Page 1 Grid Solutions Feeder Protection System Feeder protection and control Instruction manual 850 version: 2.2x GE publication code: 1601-0298-AD (GEK-119591N) *1601-0298-AD*...
Page 2 The contents of this manual are the property of GE Multilin Inc. This documentation is furnished on license and may not be reproduced in whole or in part without the permission of GE Multilin. The content of this manual is for informational use only and is subject to change without notice.
Page 3: Table Of Contents
Table of Contents 1.INTRODUCTION Overview .............................. 1 - 2 Description of the 850 Feeder Protection System............1 - 3 Security Overview..........................1 - 9 850 Order Codes..........................1 - 11 Specifications...........................1 - 16 Device ................................1 - 16 Protection..............................1 - 16 Control .................................
Page 4 IRIG-B................................2 - 38 3.INTERFACES Front Control Panel Interface......................3 - 2 850 Graphical Display Pages ......................3 - 4 Working with Graphical Display Pages ..................3 - 6 Single Line Diagram..........................3 - 9 Rugged and Membrane (3 PB) Front Panel LEDs ..............3 - 11 Ten (10) Pushbutton Membrane Front Panel LEDs ..............3 - 13...
Page 5 Current Sensing............................5 - 65 Voltage Sensing ............................5 - 66 Traditional VT............................5 - 66 LEA (Low Energy Analog) ........................5 - 68 Power System ............................5 - 69 Breakers..............................5 - 70 Switches..............................5 - 73 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 6 Admittance ............................ 6 - 118 Neutral Admittance (21YN)......................6 - 118 Power Elements........................... 6 - 126 Directional Power (32)........................6 - 127 Wattmetric Ground Fault (32N) .....................6 - 132 Frequency Elements ......................... 6 - 137 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 7 Shot................................8 - 88 Rate Supervision ............................. 8 - 90 Current Supervision..........................8 - 92 Zone Coordination ..........................8 - 95 CT Supervision ..........................8 - 98 VT Fuse Failure (VTFF)........................ 8 - 105 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 8 Admittance ............................11 - 5 Neutral Admittance..........................11 - 5 Currents.............................. 11 - 5 Voltages ............................. 11 - 7 Frequency ............................11 - 8 Fast Underfrequency........................11 - 9 Harmonics 1(Harmonics 2)......................11 - 9 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 9 In-service Maintenance........................13 - 4 Out-of-service Maintenance ......................13 - 4 Unscheduled Maintenance (System Interruption) ..............13 - 4 A.APPENDIX A Warranty.............................. A - 1 Revision history..........................A - 1 Major Updates ............................A - 2 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 10 VIII 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 11 850-D variant is used to provide primary (main) or backup protection for underground and overhead feeders for utility and industrial power networks. The 850-D variant, with support for up to eight CT inputs and two sets of four traditional VT inputs, provides effective protection, control and monitoring of two distribution feeders.
Page 12 Chapter 4: Setpoints. The logic diagrams include a reference to every setpoint related to a feature and show all logic signals passed between individual features. Information related to the selection of settings for each setpoint is also provided. 1–2 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 13: Description Of The 850 Feeder Protection System
CHAPTER 1: INTRODUCTION DESCRIPTION OF THE 850 FEEDER PROTECTION SYSTEM Description of the 850 Feeder Protection System Relay functions are controlled by two processors: a Freescale MPC5125 32-bit microprocessor that measures all analog signals and digital inputs and controls all output relays, and a Freescale MPC8358 32-bit microprocessor that controls all the advanced Ethernet communication protocols.
Page 14 DESCRIPTION OF THE 850 FEEDER PROTECTION SYSTEM CHAPTER 1: INTRODUCTION Figure 1-1: 850-E and 850-D (Single Feeder System) Single Line Diagram 21YN 59_2 VTFF Fast Underfrequency 3 CTs UV Restoration 50BF 51_2 50_2 67_2 SOTF* UF Restoration Bus Transfer 50G/...
Page 15 CHAPTER 1: INTRODUCTION DESCRIPTION OF THE 850 FEEDER PROTECTION SYSTEM Figure 1-3: 850-P Single Line Diagram LEA2 59 _ 2 3 CTs 3 CTs 3 CTs 50BF 51_2 50_2 50G/ Harmonic Detection Demand Pulsed Outputs Switch METERING BREAKER TRANSIENT RECORDER...
Page 16 DESCRIPTION OF THE 850 FEEDER PROTECTION SYSTEM CHAPTER 1: INTRODUCTION ANSI Description 850-E 850-D 850-P Device Industrial Distribution Padmount Neutral Overvoltage Y (4) Y (4) Y (4) Phase Overvoltage Y (4) Y (4) Auxiliary Overvoltage Y (2) Y (4) 59_2...
Page 17 CHAPTER 1: INTRODUCTION DESCRIPTION OF THE 850 FEEDER PROTECTION SYSTEM Table 1-2: Other 850 Device Functions Description Analog Input Analog Output Breaker Arcing Current (I Breaker Control Breaker Health CT Supervision Current/Power Demand Data Logger Digital Counters Event Recorder Fault Report and Fault Locator...
Page 18 DESCRIPTION OF THE 850 FEEDER PROTECTION SYSTEM CHAPTER 1: INTRODUCTION Figure 1-4: Main Menu Hierarchy Targets S tatus Summary Breakers Switches Last Trip Data Arc Flash Setpoints Device Contact Inputs System Output Relays Inputs Virtual Inputs Outputs Virtual Outputs Flex States...
Page 19: Security Overview
The basic security feature is present in the default offering of the 850 relay. The 850 introduces the notion of roles for different levels of authority. Roles are used as login names with associated passwords stored on the device. The following roles are available at present: Administrator, Operator, Factory and Observer, with a fixed permission structure for each one.
Page 20 If the user ID credential does not match one of the device local accounts, the 850 automatically forwards the request to a RADIUS server when one is provided. If a RADIUS server is provided, but is unreachable over the network, server authentication requests are denied.
Page 21: 850 Order Codes
Navigate to https://www.gegridsolutions.com/multilin/catalog/850.htm and click Buy Retrofit Kit for further information. The information to specify an 850 relay is provided in the following Order Code figures. 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 1–11...
Page 22 Basic: Membrane Keypad with 3 Pushbuttons Standard: Rugged Keypad 3 Pushbuttons Advanced: Membrane Front Panel with 10 Pushbuttons Standard (850-D): 37(3), 50P (4/CT bank), 50N (4/CT bank), 50G (4/CT bank), 51P(4), 51N(4), 51G(2/CT bank), 50SG(4/CT bank), 50_2(4/CT bank), 51SG(2/CT bank), 51_2 Current Protection...
Page 23 Not Available Retrofit Kit Option Wye 750-850 Retrofit Kit, terminal block wiring assembly for wye (retrofit kit only) Delta 750-850 Retrofit Kit, terminal block wiring assembly for delta (retrofit kit only) Wye 735-850 Retrofit Kit, terminal block wiring assembly for wye (retrofit kit only) Delta 735-850 Retrofit Kit, terminal block wiring assembly for delta (retrofit kit only) 1.
Page 24 Standard: Rugged Keypad 3 Pushbuttons Advanced: Membrane Front Panel with 10 Pushbuttons Standard (850-P): 50P (4/CT bank), 50N (4/CT bank), 50G (4/CT bank), 51P (2/CT Current Protection bank), 51N (2/CT bank), 51G (2/CT bank), 50_2 (4/CT bank), 51_2 (2/CT bank)
Page 25 18J0-0030 8 Series Depth Reducing Collar - 1 3/8" • 18J0-0029 8 Series Depth Reducing Collar - 3" • 8 Series Retrofit Kit, 750/760 to 850 • 8 Series Retrofit Kit, 735 to 850 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 26: Specifications
Curve Timing Accuracy:........at >1.1 x PKP: 3.5% of operate time ± ½ cycle (whichever is greater) from pickup to operate Timer Accuracy:..........± 3% of operate time or ± ½ cycle (whichever is greater) 1–16 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 27 Dropout Level: ............102 to 103% of Pickup Level Accuracy:............± 0.5% of reading from 10 to 208 V Undervoltage Curves: ........Definite Time, GE IAV Inverse Time or FlexCurves A/B/C/D Pickup Time Delay:..........0.000 to 6000.000 s in steps of 0.001 s Operate Time:............< 20 ms at 0.90 x pickup at 60 Hz <...
Page 28 Operate Time: ............<20 ms at 1.1 x pickup at 60 Hz <24 ms at 1.1 x pickup at 50 Hz Timing Accuracy:..........± 3% of delay setting or ± ¼ cycle (whichever is greater) from pickup to operate 1–18 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 29 Minimum Current Supervision Pickup:..............0.02 to 1.00 x CT in steps of 0.01 Dropout: ..............103% of pickup Minimum Voltage Supervision Pickup:..............0.01 to 1.50 x VT in steps of 0.01 Dropout: ..............103% of pickup 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 1–19...
Page 30 Operate Time: ............< 25 ms at 1.1 x pickup at 60 Hz < 30 ms at 1.1 x pickup at 50 Hz Timer Accuracy:..........± 3% of delay setting or ± ¼ cycle (whichever is greater) from pickup to operate 1–20 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 31 Operating time specifications given above are applicable when RMS inputs are used. NOTE: Typical times are average operate times over multiple test cases. NOTE Timer Accuracy: ..........±3% of delay setting or ± ¼ cycle (whichever is greater) from pickup to operate 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 1–21...
Page 32 Level Accuracy: ........... ±0.5% of reading from 10 to 208 V Phases Required for Operation:....Any one, Any two, All three Undervoltage Curves:........Definite Time, GE IAV Inverse Time or FlexCurves A/B/C/D Pickup Time Delay: ..........0.000 to 6000.000 s in steps of 0.001s Operate Time: ............
Page 33 Pickup Level:............0.005 to 3.000 x CT in steps of 0.001 x CT Dropout Level: ............97 to 98% Operate Time (no direction transition):..< 12 ms typical at 3 × Pickup at 60 Hz < 15 ms typical at 3 × Pickup at 50 Hz 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 1–23...
Page 34 Operate Time: ............<45 ms at 60 Hz,<50 ms at 50 Hz Timer Accuracy:..........±3% of delay setting or ± 2 power cycles (whichever is greater) from pickup to operate Stages: ..............Trip and Alarm No. of Elements:........... 3 1–24 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 35 Operate Time:............< 40 ms at 1.1 x pickup at 60 Hz, < 47 ms at 1.1 x pickup at 50 Hz Curve Timing Accuracy: ........± 3% of curve delay or ± ¾ cycle (whichever is greater) from pickup to operate 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 1–25...
Page 36: Control
LOCAL CONTROL MODE Number of Elements: ........1 Select Before Operate Mode: ......Disabled, Enabled Mode:................ Local Mode ON, Local Mode OFF Display Status: .............LM (local mode) displayed in banner Tagging: ..............Disabled, Enabled 1–26 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 37 Dropout Time Delay: .........0.000 to 6000.000 s in steps of 0.001 s Operate Time:............< 2 ms at 60 Hz Timer Accuracy: ..........± 3% of delay time or ± ¼ cycle (whichever is greater) from pickup to operate 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 1–27...
Page 38: Monitoring
CT%error + user data ZLine%error + user data Captured Data: ............ Pre-fault and fault phasors for all CT and VT banks, pre-fault and fault trigger operands, user-programmable analog channels 1 to 32 1–28 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 39: Recording
Time-tag Accuracy: ...........One microsecond Settings:..............64 Configurable FlexAnalog parameters, Event Selector Actuals: ..............Selected Event Number, Timestamp of Selected Event, Cause of Selected Event, 64 Configurable FlexAnalog values Commands: ............None (using existing Clear Event Recorder) 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 1–29...
Page 40: User-Programmable Elements
Pickup and dropout delays:......0.000 to 6000.000 s in steps of 0.001 s FLEXSTATES Number of States: ..........256 logical variables grouped under 16 Modbus addresses Programmability:..........Any FlexLogic operand, any digital input, any virtual input, any remote input 1–30 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 41: Metering
Range: ..............-214748364.8 kW to 214748364.7 kW Parameters:............3-phase; per phase if VT is Wye Accuracy:..............± 1.0% of reading or 0.2 kW (whichever is greater) at -0.8 < PF ≤ -1.0 and 0.8 < PF < 1.0 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 1–31...
Page 42 I > 0.4 x CT: ± 0.01 Hz (input frequency 15 to 70 Hz) CURRENT AND VOLTAGE HARMONICS Parameters:............Magnitude of each harmonic and THD Range:..............2 to 25 harmonic: per-phase displayed as % of f fundamental frequency THD: per-phase displayed as % of f 1–32 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 43: Inputs
Input Impedance:..........375 Ω ± 10% Conversion range: ..........0 to +21 mA DC Accuracy:..............± 1% of full scale, Type: .................Passive Analog Input Supply:.........+24 V DC at 100 mA max. Sampling Interval: ..........Typically 500 ms 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 1–33...
Page 44 RTD Inputs Available: ........6 RTD inputs with one module or 12 inputs with 2 modules (IO cards R or S). 1 RTD input with IO card L. 6 to 12 RTD inputs with RMIO modules 1 through 4 1–34 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 45: Outputs
UL508 requirements: 1 second on / 10 seconds off, 9% duty cycle. FORM-A VOLTAGE MONITOR Applicable voltage:..........20 to 250 VDC Trickle current:............1 to 2.5 mA Timer acurracy: ...........± 3% of operate time or ± 1/4 cycle (whichever is greater) 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 1–35...
Page 46 Operating Time (coil energization to contact closure, resistive load):....<8ms Contact Material: ..........Silver alloy Mechanical Endurance (no load):....> 10,000 Maximum Frequency of operation: ...360/h Protection Device across contact:....EMI Suppression Cap, 1nF 1–36 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 47 Operating Time (coil energization to contact closure, resistive load):....<0.2 ms Contact Material:..........Hybrid Mechanical Endurance (no load): ....> 10,000 Maximum Frequency of operation:....360/h Protection Device across contact: ....MO V, rated @ 250 VAC/320 VDC 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 1–37...
Page 48: Power Supply
Protocols:..............Modbus TCP, DNP3.0, IEC60870-5-104, IEC 61850, IEC 61850 GOOSE, IEEE 1588, SNTP, IEC 62439-3 clause 4 (PRP), OPC-UA Wavelength:............1310nm Typical link distance:......... 4 km Standard specification:........Compliant with USB 2.0 Protocols:..............Modbus TCP, TFTP 1–38 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 49 Maximum Distance:...........250 m (820 ft) Cable Type: ............Shielded or unshielded twisted pair Cable Gauge: ............Belden 9841 or similar 24 AWG for distances up to 100m; 22 AWG for distances up to 250 m. 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 1–39...
Page 50: Testing & Certification
Environmental (Dry heat) IEC60068-2-2 85C 16hrs Relative Humidity Cyclic IEC60068-2-30 6 day humidity variant 2 IEEE/ANSI C37.90.1 4kV, 5 kHz Damped Oscillatory IEEE/ANSI C37.90.1 2.5 kV, 1 MHz Dielectric Between contacts IEEE C37.90 1500Vrms 1–40 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 51: Physical
Operating up to 95% (non condensing) @ 55°C (As per IEC60068-2-30 Variant 2, 6 days) Altitude: 2000m (standard base reference evaluated altitude) 5000m (maximum achievable altitude) Pollution Degree: Overvoltage Category: Ingress Protection: IP54 Front Insulation Class: Noise: 0 dB 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 1–41...
Page 52: Cautions And Warnings
Follow the requirements of this manual, including adequate wiring size and type, terminal torque settings, voltage, current magnitudes applied, and adequate isolation/ clearance in external wiring from high to low voltage circuits. Use the device only for its intended purpose and application. 1–42 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 53 Use an external disconnect to isolate the mains voltage supply. 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 1–43...
Page 54: Must-Read Information
Note that the factory role password may not be changed. • In 850 both DNP and IEC104 protocol can work at the same time, but consider that there is only one point map. So, both protocols use the same configured points.
Page 55: Storage
Specifications. Use the factory-provided dust caps on all Arc Flash sensor fiber and connectors when not in use, to avoid dust contamination in the transceiver and sensor plugs. 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 1–45...
Page 56: For Further Assistance
Customers are responsible for shipping costs to the factory, regardless of whether the unit is under warranty. • Fax a copy of the shipping information to the GE Grid Solutions service department. Use the detailed return procedure outlined at https://www.gegridsolutions.com/multilin/support/ret_proc.htm The current warranty and return information are outlined at https://www.gegridsolutions.com/multilin/warranty.htm...
Page 57: Product Identification
Product Identification The product identification label is located on the side panel of the 850. This label indicates the product model, serial number, and date of manufacture. Figure 2-1: Product Label...
Page 58: Dimensions
MECHANICAL INSTALLATION CHAPTER 2: INSTALLATION Dimensions The dimensions (in inches [millimeters]) of the 850 are shown below. Additional dimensions for mounting, and panel cutouts, are shown in the following sections. Figure 2-2: 850 Dimensions 2–2 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 59: Mounting
CHAPTER 2: INSTALLATION MECHANICAL INSTALLATION Mounting The 850 unit can be mounted two ways: standard panel mount or optional tab mounting, if required. • Standard panel mounting: From the front of the panel, slide the empty case into the cutout. From the rear of the panel, screw the case into the panel at the 8 screw positions (see figures in Standard panel mount section).
Page 60: Standard Panel Mount
To avoid the potential for personal injury due to fire hazards, ensure the unit is CAUTION: mounted in a safe location and/or within an appropriate enclosure. Figure 2-4: Standard panel mount Figure 2-5: Panel cutout dimensions 2–4 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 61: Depth Reducing Collar
Dimensions in inches GE PN 'A' DEPTH 1009-0310 1 3/8" 1009-0311 3" 892703A1.dwg Figure 2-7: Depth reducing collar panel cutout 3.86 3.86 .220 4.74 3.85 9.00 3.85 4.74 7.25 Dimensions in inches 892703A1.dwg 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 2–5...
Page 62 Mount the required collar (depth 1.375" or 3") on the captive unit using eight screws as shown. Mount the combined unit and collar on the panel using eight screws as shown. 2–6 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 63: Draw-Out Unit Withdrawal And Insertion
Turn off control power before drawing out or re-inserting the relay to prevent mal- FASTPATH: operation. Follow the steps outlined in the diagrams below to insert and withdraw the Draw-out unit. Figure 2-9: Unit withdrawal and insertion diagram 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 2–7...
Page 64: Removable Power Supply
Follow the steps outlined in the Insert or Remove Power Supply diagram to insert (#1) or remove (#2) the power supply from the unit. Figure 2-10: Insert or Remove the Power Supply Figure 2-11: Unlatch Module (location is marked by arrow) 2–8 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 65: Removable Magnetic Module
CHAPTER 2: INSTALLATION MECHANICAL INSTALLATION Removable Magnetic Module Follow the steps outlined in the diagram below to insert or remove the magnetic module from the unit. Figure 2-12: Insert or Remove the Magnetic Module 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 2–9...
Page 66: Remote Module I/O (Rmio)
Figure 2-14: RMIO - Base Unit screw mounting MEETS VIBRATION REQUIREMENT OF IEC 60255 SEC 21.1, 21.2, & 21.3 2.250” (57,15 mm) #6 -32 THREADED HOLE QTY: 2 4.100” (104,14 mm) 853727A1.CDR 2–10 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 67 [58.04 mm] EXPANSION UNIT OUTLINE #6-32 THREADED HOLE 1.500” QTY: 2 [38.10 mm] #6-32X1/2 FT FLAT HEAD PHIL ZINC 853755A1.cdr QTY: 2; (SUPPLIED); GE PART # 1406-0117 TIGHTENING TORQUE: 10 lb. in. 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 2–11...
Page 68: Ip20 Back Cover
Place the IP20 cover in the orientation shown over the CT/VT terminal blocks, routing wiring through the cover slots. Secure the cover with the 4 screws provided. Suggested tightening torque is 8 lb-in. Figure 2-16: IP20 Back Cover installation 2–12 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 69: Arc Flash Sensor
Secure all sensor fibers (loosely but securely) away from any moving parts. • Use the factory-provided dust caps on all Arc Flash sensor fiber and connectors when not in use, to avoid dust contamination in the transceiver and sensor plugs. 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 2–13...
Page 70: Sensor Installation
The small rubber dust caps must be removed before operation. Electrical Installation Typical Wiring Diagram The following illustrates the electrical wiring of the Draw-out unit. 2–14 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 71 CHAPTER 2: INSTALLATION ELECTRICAL INSTALLATION Figure 2-18: Typical wiring diagram – 850-D CONTROL POWER GROUND A1 A2 * AVAILABLE WITH SENSITIVE GROUND ONLY * AVAILABLE WITH SENSITIVE STUD GROUND ONLY PHASE CTs PWR SUPPLY SLOT K SLOT A ARC FLASH...
Page 72 ELECTRICAL INSTALLATION CHAPTER 2: INSTALLATION Figure 2-19: Typical wiring diagram – 850-E DIRECTION OF POWER FLOW FOR POSITIVE WATTS POSITIVE DIRECTION OF LAGGING VARS PHASE CTs WYE VT SEE VT WIRING IN CONNECTION INSTRUCTION MANUAL CONTROL POWER SEE GROUND INPUT WIRING IN...
Page 73 CHAPTER 2: INSTALLATION ELECTRICAL INSTALLATION Figure 2-20: Typical wiring diagram – 850-P 850-P 4-Way Pad Mounted Switchgear PORT 4 PORT 5 3ph LEA 1 PORT 1 3ph CT 1 3ph CT 2 3ph CT 3 3ph CT 4 894216A1.CDR 3-Phase LEA 2 850 FEEDER PROTECTION SYSTEM –...
Page 74: Terminal Identification
This is to ensure the adjacent lower terminal block does not interfere with the lug body. NOTE Figure 2-21: Orient the Lugs Correctly SCREW WASHER LOWER TERMINAL TERMINAL BLOCK DIVIDER Figure 2-22: Correct Installation Method 2–18 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 75 ELECTRICAL INSTALLATION Figure 2-23: INCORRECT INSTALLATION METHOD (lower lug reversed) A broad range of applications are available for the 850 relays. As such, it is not possible to present typical connections for all possible schemes. The information in this section covers the important aspects of interconnections, in the general areas of instrument transformer inputs, other inputs, outputs, communications and grounding.
Page 76 Figure 2-24: Rear Terminal Layout of the 8 Series Platform BASIC COMMS COMMS S COMMS C PORT 4 PORT 4 PORT 5 PORT 5 PORT 1 BANK - J1 BANK - K1 BANK - J2 BANK - K2 AC ANALOG INPUTS 2–20 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 77 RS485_1 (-) RS485_1 COM RS485_1 COM RESERVED RESERVED RESERVED RESERVED optional RMIO COM optional RMIO COM optional RMIO + optional RMIO + optional RMIO - optional RMIO - RJ45 ETHERNET RJ45 NOT USED 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 2–21...
Page 78 RTD 5 +24 V B13/C13 COMP RTD 5/6 B14/C14 RETURN FIBER INPUT 1 B15/C15 FIBER INPUT 2 RTD 6 B16/C16 COMP FIBER INPUT 3 B17/C17 SHIELD FIBER INPUT 4 B18/C18 RESERVED 894213A1.CDR 2–22 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 79 DIGITAL INPUT 10 B/C11 B/C12 COMMON B/C13 DIGITAL INPUT 11 B/C14 DIGITAL INPUT 12 THRESHOLD B/C15 DIGITAL INPUT 13 SETTING B/C16 DIGITAL INPUT 14 GROUP 3 B/C17 DIGITAL INPUT 15 B/C18 COMMON 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 2–23...
Page 80 CT3 PhC RETURN LEA 2C CT3 N/G IN LEA 2N CT3 N/G RETURN For 850-P, the ground input of all three CTs can be used if a 4th 3-Phase CT is required. NOTE: NOTE 2–24 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 81: Wire Size
Suggested wiring screw tightening torques are: terminal strips A-H tighten to 4.5 in-lbs (0.5 N-m) and terminal blocks J, K to 15 in-lb (1.7 N-m). Figure 2-27: Fiber Connector Types (S - ST) 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 2–25...
Page 82: Rmio Module Installation
Figure 2-28: RMIO unit showing 2 IO_G modules Figure 2-29: RMIO terminal identification with 4 IO_G modules IO_G IO_G IO_G IO_G Common 896750.cdr 2–26 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 83: Phase Sequence And Transformer Polarity
Depending on order code, the 850 relay can have up to four (4) current inputs in each J slot and K slot. Three of them are used for connecting to the phase CT phases A, B, and C. The fourth input is a ground input that can be connected to either a ground CT placed on the neutral from a Wye connected transformer winding, or to a “donut”...
Page 84: Ground Ct Inputs
PHASE CT PRIMARY setpoint. The sensitive ground current input can be connected to a Zero Sequence CT for increased sensitivity and accuracy when physically possible in the system. Figure 2-31: Ground Inputs 2–28 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 85 CHAPTER 2: INSTALLATION ELECTRICAL INSTALLATION Figure 2-32: Sensitive Ground Inputs (available for 850-E and 850-D) 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 2–29...
Page 86: Voltage Inputs
CHAPTER 2: INSTALLATION Voltage Inputs The 850 relays have four channels for AC voltage inputs, each with an isolating transformer in each J and K slot. Voltage transformers up to a maximum 5000:1 ratio may be used. The nominal secondary voltage must be in the 10 to 240 V range. In Main-Tie- Main bus transfer scheme, the three phase inputs are mostly used for “Bus voltage”.
Page 87: Zero-Sequence Ct Installation
UNSHIELDED CABLE SHIELDED CABLE Ground connection to neutral Stress cone must be on the source side Source Source shields Ground outside CT To ground; LOAD must be on load side 996630A5 LOAD 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 2–31...
Page 88: Control Power
A tinned copper, braided, shielding and bonding cable should be used. As a minimum, 96 strands of number 34 AWG should be used. Belden catalog number 8660 is suitable. Figure 2-36: Control Power Connection 2–32 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 89: Contact Inputs
Wet or Dry input signal types can be connected to contact input terminals as shown in the figure: Wet and Dry Contact Input Wiring Examples. Dry inputs use an internal +24V that is supplied by the 850. The voltage threshold must be set to 17V for the inputs to be recognized using the internal +24V.
Page 90: Output Relays
RELAY_11 RELAY_19 RELAY_3 Analog Out_7 RELAY_11 RELAY_3 RELAY_11 RELAY_19 RELAY_3 Return RELAY_11 RELAY_3 RELAY_11 RELAY_19 RELAY_3 Shield RELAY_11 RELAY_4 RELAY_12 RELAY_20 RELAY_4 Analog In_1 RELAY_12 RELAY_4 RELAY_12 RELAY_20 RELAY_4 Analog In_2 RELAY_12 2–34 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 91 Digital In_5 Digital In_12 Digital In_5 Digital In_6 Digital In_13 Digital In_6 Digital In_7 Digital In_14 Digital In_7 Common Common Common +24V +24V +24V RELAY_8 RELAY_16 RELAY_8 RELAY_8 RELAY_16 RELAY_8 RELAY_8 RELAY_16 RELAY_8 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 2–35...
Page 92 Digital In_6 Digital In_13 Common Digital In_7 Common Digital In_23 Common Digital In_14 Digital In_24 +24V Digital In_15 Digital In_25 RELAY_8 Digital In_16 Digital In_26 RELAY_8 Digital In_17 Digital In_27 RELAY_8 Common Common 2–36 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 93: Serial Communications
CAUTION: that the common terminals of each RS485 port are tied together and grounded only once, at the master or at the 850. Failure to do so may result in intermittent or failed communications. The source computer/PLC/SCADA system should have similar transient protection devices installed, either internally or externally.
Page 94: Irig-B
DC level shift or amplitude modulated (AM) form. The type of form is auto-detected by the 850 relay. Third party equipment is available for generating the IRIG-B signal; this equipment may use a GPS satellite system to obtain the time reference so that devices at different geographic locations can also be synchronized.
Page 95 • Interfacing via the EnerVista 8 Series Setup software. This section provides an overview of the interfacing methods available with the 850 using the relay control panel and EnerVista 8 Series Setup software. For additional details on interface parameters (for example, settings, actual values, etc.), refer to the individual chapters.
Page 96 The rugged and membrane faceplate includes 3 programmable function pushbuttons and 17 programmable LEDs. The 10 Pushbutton Membrane faceplate includes 10 programmable function pushbuttons for a total of 22 programmable LEDs. Figure 3-1: 10 PB Membrane Faceplate 3–2 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 97: Interfaces Front Control Panel Interface
CHAPTER 3: INTERFACES FRONT CONTROL PANEL INTERFACE Figure 3-2: Membrane Faceplate (3 pushbutton) Figure 3-3: Rugged Faceplate The USB port is intended for connection to a portable computer. 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 3–3...
Page 98: Graphical Display
Pressing the Menu key during the display of the default message, returns the display to the last message shown before the default message appeared. Any Trip, Alarm, or Pickup is displayed immediately, automatically overriding the default message. 3–4 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 99 Dig Counters Energy Remote Modbus Device Power Factor Current Demand Clear Records Power Demand Thermal Capacity Directional Power Wattmetric Gnd Flt Arc Flash RTDs RRTDs RTD Maximums RRTD Maximums Analog Inputs FlexElements 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 3–5...
Page 100: Working With Graphical Display
Pages Figure 3-5: Typical paging operation from the main menu There are two ways to navigate throughout the 850 menu: using the pushbuttons corresponding to the soft tabs from the screen, or by selecting the item from the list of items on the screen using the “Up”...
Page 101 The Enter pushbutton has a dual function. It is used to display a sub-menu when an item is highlighted. It is also used to save the desired value for any selected setpoint. 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 3–7...
Page 102 The Reset pushbutton clears all latched LED indications, target messages, and latched output relays, providing the conditions causing these events are not present. To change (or view) an item on (or from) the 850 menus: Use the pushbuttons that correspond to the tabs (Targets, Status, Metering, Setpoints, Records) on the screen to select a menu.
Page 103: Single Line Diagram
Setpoints > Device > Front Panel > Display Properties > Color Scheme Single Line Diagram for 850 and Breaker status color The 850 has a single line diagram (SLD) that represents the power system. The single line diagram provided is pre-configured to show: •...
Page 104 Configured Connected Configured Disconnected *850 considers the breaker state Connected when detection of the Connected/ Disconnected state of the breaker is not configured. Connected/Disconnected detection is not configured when setpoint Connected (under Setpoints > System > Breaker ) is set to OFF.
Page 105: Rugged And Membrane (3 Pb) Front Panel Leds
• Reset mode: self-reset or latched The 850 front panel provides two columns of 7 LED indicators each, and 3 LED pushbutton indicators. The “IN-SERVICE” (LED 1) and the “PICKUP” (LED 4) indicators from the first LED column are non-programmable LEDs. The bottom 3 LED indicators from the first column, and the 7 LED indicators from the second LED column are fully programmable.
Page 106 RESET button on the front panel is pressed after the operand is reset. Default labels are shipped in the package of every 850, together with custom templates. A custom LED template is available for editing and printing, refer to publication GET-20035 from http://www.gegridsolutions.com/multilin.
Page 107: Ten (10) Pushbutton Membrane Front Panel Leds
PHASE A FAULT PHASE A FAULT PHASE B FAULT PHASE B FAULT PHASE C FAULT PHASE C FAULT GROUND FAULT GROUND FAULT 50P INST OC 50P INST OC 27 PHASE UV LOCKOUT 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 3–13...
Page 108 27 PHASE UV (Order Code without Autoreclose) This LED indicates that the Phase Undervoltage 1 function has operated. • LOCKOUT (Order Code with Autoreclose) This LED indicates that the Autoreclose function has reached the lockout stage. 3–14 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 109: Home Screen Icons
Table 3-5: Breaker Health Icon Description The Breaker Health icon is blue when the setting for the breaker health function is not disabled. When the setting is disabled the icon is grey. 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 3–15...
Page 110 Table 3-7: Local Mode Icon Description Indicates that Local Mode is active. During Local Mode, the control for the breakers and disconnect switches can be performed only by the relay front panel. 3–16 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 111: Relay Messages
Displays a detailed description of the error on the relay display as a target message • Records the minor self-test error in the Event Recorder • Flashes the “ALARM” LED Upon detection of a major problem, the relay does the following: • De-energizes critical failure relay 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 3–17...
Page 112 The Critical Failure Relay (Output Relay 8) is energized when the relay is in-service, and no NOTE: major error is present NOTE Under both conditions, the targets cannot be cleared if the error is still active. Figure 3-15: Minor Errors Figure 3-16: Major Errors 3–18 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 113 Ensure Ethernet cable is Secondary connected, check cable functionality (i.e. physical damage or perform continuity test), and ensure master or peer device is functioning. If none of these apply, contact the factory. 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 3–19...
Page 114 (error code) detected supply the failure code as noted on the display. When a total loss of power is present, the Critical Failure Relay (Output Relay 8) is de- NOTE: energized. NOTE 3–20 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 115: Out Of Service
Templates for printing custom LED labels are available online at: NOTE: http://www.gegridsolutions.com/app/ViewFiles.aspx?prod=850&type=9. NOTE The following procedures describes how to use the label removal tool. Bend the tabs of the tool upwards as shown in the image. 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 3–21...
Page 116 Slide the label tool under the user-programmable pushbutton label as shown in the next image. Make sure the bent tab is pointing away from the relay. Remove the tool and user-programmable pushbutton label as shown in image. 3–22 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 117: Software Interface
The EnerVista 8 Series Setup software can run without a 850 connected to the computer. In this case, settings may be saved to a file for future use. If a 850 is connected to a PC and communications are enabled, the 850 can be programmed from the setting screens. In addition, measured values, status and trip messages can be displayed with the actual value screens.
Page 118: Installing The Enervista 8 Series Setup Software
In the EnerVista Launchpad window, click the Add Product button and select the 850 Protection System as shown below. Select the Web option to ensure the most recent software release, or select CD if you do not have a web connection, then click the Add Now button to list software items for the 850.
Page 119 If you are going to communicate from your computer to the 850 Relay using the USB port: 10. Plug the USB cable into the USB port on the 850 Relay then into the USB port on your computer. 11. Launch EnerVista 8 Series Setup software from LaunchPad.
Page 120: Upgrading The Software
The latest EnerVista software and firmware can be downloaded from: Software https://www.gegridsolutions.com/ After upgrading, check the version number under Help > About. If the new version does not display, try uninstalling the software and reinstalling the new versions. 3–26 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 121: Connecting Enervista 8 Series Setup Software To The Relay
As indicated by the window, the "Quick Connect" feature can quickly connect the EnerVista 8 Series Setup software to a 850 front port if the USB is selected in the interface drop-down list. Select “USB” and press the Connect button. Ethernet or WiFi can also be used as the interface for Quick Connect as shown next.
Page 122: Configuring Ethernet Communications
When connected, a new Site called “Quick Connect” appears in the Site List window. The 850 Site Device has now been configured via the Quick Connect feature for either USB or Ethernet communications. Proceed to Connecting to the Relay next, to begin communications.
Page 123 Enter the IP address, slave address, and Modbus port values assigned to the 850 relay (from the Setpoints > Device > Communications menu). Click the Read Order Code button to connect to the 850 and upload the order code. If a communications error occurs, ensure that the Ethernet communication values correspond to the relay setting values.
Page 124: Connecting To The Relay
The settings can now be edited, printed, or changed. Other setpoint and command windows can be displayed and edited in a similar manner. "Actual Values" windows are also available for display. These windows can be arranged, and resized, if desired. 3–30 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 125: Working With Setpoints & Setpoints Files
Click = to exit from the keypad and keep the new value. Click on X to exit from the keypad and retain the old value. 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 3–31...
Page 126: File Support
In the Setpoints > System Setup > Voltage Sensing dialog box, click on Save to save the values into the 850. Click YES to accept any changes and exit the window. Click Restore to retain previous values. Click Default to restore Default values.
Page 127: Using Setpoints Files
Modbus user map Factory default values are supplied and can be restored after any changes. The 850 displays relay setpoints with the same hierarchy as the front panel display. Downloading & Saving Back up a copy of the in-service settings for each commissioned unit, so as to revert to the...
Page 128: Adding Setpoints Files To The Environment
The Open dialog box is displayed, prompting to select a previously saved setpoint file. As for any other MS Windows® application, browse for the file to be added then click Open. The new file and complete path will be added to the file list. 3–34 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 129: Creating A New Setpoints File
Select the file name and path to store the file, or select any displayed file name to replace an existing file. All 850 setpoint files should have the extension ‘.cid’ (for example, ‘850 1.cid’). Click OK to complete the process. Once this step is completed, the new file, with a complete path, is added to the 850 software environment.
Page 130: Upgrading Setpoints Files To A New Revision
Upgrading Setpoints It is often necessary to upgrade the revision for a previously saved setpoint file after the Files to a New 850 firmware has been upgraded. This is illustrated in the following procedure: Revision Establish communications with the 850 relay.
Page 131: Printing Setpoints
Setpoint lists can be printed in the same manner by right clicking on the desired file (in the file list) or device (in the device list) and selecting the Print Device Information or Print Settings File options. 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 3–37...
Page 132: Printing Values From A Connected Device
The following procedure illustrates how to load setpoints from a file. Before loading a setpoints file, it must first be added to the 850 environment as described in the section, Adding Setpoints Files to the Environment.
Page 133: Uninstalling Files And Clearing Data
The Quick Setup item is accessed from the EnerVista software from different screens. Online and offline settings changes are made from the corresponding Quick Setup screen. Figure 3-17: 850 Quick Setup (Online) tree position Figure 3-18: 850 Quick Setup (Offline) tree position 850 FEEDER PROTECTION SYSTEM –...
Page 134 12001 and tries to save it. Quick Setup displays a warning dialog. Pressing OK leaves the setting value at 12001, but not 12000 (max. value) as is the case with other views. 3–40 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 135 CHAPTER 3: INTERFACES SOFTWARE INTERFACE 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 3–41...
Page 136: Upgrading Relay Firmware
Note that uploading firmware to a relay having a Communications card must be done with “Port 4 operation” configured as independent. Before upgrading firmware, it is very important to save the current 850 settings to a file on FASTPATH: your PC. After the firmware has been upgraded, it will be necessary to load this file back into the 850.
Page 137 The firmware filename has the following format. The following screen appears. Select YES to proceed. EnerVista 8 Series Setup software now prepares the 850 to receive the new firmware file. The 850 front panel momentarily displays “Upload Mode”, indicating that it is in upload mode.
Page 138 After the Boot 1 upload is completed, the EnerVista 8 Series Setup software again requests the user to reboot the relay. Make sure to reboot the relay first and then press the OK. Not the other way around. CAUTION: 3–44 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 139 Wait for the Comms upload process to complete. Wait for the Mains upload process to complete. The EnerVista 8 Series Setup software notifies the user when the 850 has finished loading and notifies the user to Cycle power to the relay to complete firmware update.
Page 140: Advanced Enervista 8 Series Setup Software Features
The SLD pages can also be saved individually as local XML files. The locally stored XML files can then be reloaded to generate another diagram. SLDs represent objects using GE symbols (similar to ANSI). Figure 3-21: Template SLD 3–46 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 141 The control objects consist of selectable breakers and disconnect switches. The following figure shows the different symbols in the GE Standard style and IEC style. If the switching element is tagged, blocked, or bypassed, indicators with the letters “T”, “B”, and “By”...
Page 142 0 degrees. Orientation in multiple directions allows for configuration of the single line diagram according to the existing drawings and ensure the correct side for the fixed/moving contacts. 3–48 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 143 Blocked” signal in both On and Off state. Figure 3-25: Reclose Blocked signal In addition, Remote Breaker status objects are added for GE and IEC style. Remote breaker status allows monitoring of three distant breakers. These objects are not controllable and hence cannot be used for selection and operation.
Page 144 SLD1 can be operated and controlled. By default, when entering the SLD menu, the screen displays SLD1. SLD2 through SLD6 can be accessed through the navigation pushbuttons as shown in the following figure: Active element selection with flash message. 3–50 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 145 Pressing escape once more removes the browsing highlight around the objects. If inactive during browsing for the timeout setting ( Setpoints > Device > Front Panel > 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 3–51...
Page 146 Tagged by operator. No operation allowed. Open or Closed T B By Tagged by operator. No operation allowed. For detailed tagging, blocking and bypassing operations, refer to the section Local Control Mode (breakers and switches). 3–52 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 147: Flexcurve Editor
Load Trip Times from a CSV File • The screen above shows the model followed by 850 for viewing FlexCurves. Select Initialize to copy the trip times from the selected curve to the FlexCurve. 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 148: Transient Recorder (Waveform Capture)
"CFG." The other file is a "DAT" file, required by the COMTRADE file for proper display of waveforms. • To view a previously saved COMTRADE file, click the Open button and select the corresponding COMTRADE file. 3–54 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 149 • From the window main menu bar, press the Preference button to open the COMTRADE Setup page, in order to change the graph attributes. 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 3–55...
Page 150 The Waveform Capture window reappears based on the selected graph attributes. To view a vector graph of the quantities contained in the waveform capture, press the View Phasors button to display the following window: 3–56 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 151 CHAPTER 3: INTERFACES SOFTWARE INTERFACE 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 3–57...
Page 152: Protection Summary
With the EnerVista 8 Series Setup software running and communications established, select the Setpoints > Protection Summary menu item to open the Protection Summary window. The Protection Summary screen is as follows: 3–58 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 153 CHAPTER 3: INTERFACES SOFTWARE INTERFACE 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 3–59...
Page 154: Offline Settings File Conversion
The EnerVista 8 Series Setup software reduces the manual effort required when moving from an older product to the 850. The settings file conversion feature takes an existing 750 settings file and generates a new settings file compatible with the 8 Series order code specified.
Page 155: Conversion Summary Report
32-bit PC. If the file is 16-bit, it must be converted to 32- bit using the latest 350 EnerVista Setup before doing the 850 conversion. Click OK to begin the conversion and complete the process. Once this step is completed, the new file, with a complete path, is added to the EnerVista 8 Series Setup software environment.
Page 156: Results Window
EnerVista taskbar or it can be printed from the “GUI” print button. Although the report shows successful conversion (green checkbox), the settings must still NOTE: be verified before putting the relay in service. NOTE 3–62 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 157: About Setpoints
Chapter 4: About Setpoints About Setpoints The 850 has a considerable number of programmable setpoints, all of which make the relay extremely flexible. These setpoints have been grouped into a variety of menus which are available from the paths shown below. Each setpoints menu has sub-sections that describe in detail the setpoints found on that menu.
Page 158 Files can be stored and downloaded for fast, error free entry when a computer is used. To facilitate this process, the GE EnerVista CD with the EnerVista 8 Series Setup software is supplied with the relay. The relay leaves the factory with setpoints programmed to default values, and it is these values that are shown in all the setpoint message illustrations.
Page 159: Common Setpoints
The range is “Operate” or “Do Not Operate”, and can be applied to any combination of the auxiliary output relays. The default setting is “Do Not Operate”. The available auxiliary relays vary depending on the order code. 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 4–3...
Page 160 850 relay. The targets disappear from the screen when “Self-Reset” is selected, and the conditions are cleared. The targets stay on the screen, when “Latched” is selected, and the conditions are cleared.
Page 161: Logic Diagrams
Each feature produces output flags (operands) which can be used further for creating logic in the FlexLogic equation editor, or Trip Bus, or can be directly assigned to trigger an output. The operands from all relay features constitute the list of FlexLogic operands. 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 4–5...
Page 162: Setpoints Text Abbreviations
Hz: Hertz • MAX: maximum • MIN: minimum • SEC, s: seconds • UV: undervoltage • OV: overvoltage • VT: voltage transformer • Ctrl: control • Hr & hr: hour • O/L: overload 4–6 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 163: Device, System, Input And Output Setpoints
850 Feeder Protection System Chapter 5: Device, System, Input and Output Setpoints Device, System, Input and Output Setpoints This chapter describes the Device, System, Input and Output setpoint menu settings in detail. 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 5–1...
Page 164 (greyed out). • In Regular configuration mode, all function/features and setpoints of the device are editable and nothing is hidden or greyed out. 5–2 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 165 Instantaneous Direction Disabled Direction Disabled Voltage Restraint Disabled Voltage Restraint Disabled Relays Do Not Operate Volt Lower Limit p.u. PTOC 1 Block Relays Do Not Operate Events Enabled Targets Self-Reset PTOC 1 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 5–3...
Page 166: Clock
PTP and IRIG-B can be swapped. If both PTP and IRIG-B are available to the 850, by default the 850 clock syncs to PTP over IRIG-B. If PTP is not available the 850 CPU syncs the internal clock to IRIG-B.
Page 167: Ptp Configuration
Ethernet switch it is connected to is 9000 ns and that the delay from the switch to the relay is 11000 ns, then the mean delay is 10000 ns, and the path delay asymmetry is +1000 ns. 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 5–5...
Page 168 The setting sets the priority of PTP time for the relay. If set to 1 and IRIG-B is available, the relay syncs the relay’s time reference to the PTP time. If set to 2 and IRIG-B is available, the relay syncs its reference to IRIG-B time. 5–6 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 169: Clock
Range: 1st, 2nd, 3rd, 4th, Last Default: Not Set DST END DAY Range: SUN to SAT (all days of the week) Default: Not Set DST END HOUR Range: 0 to 23 Default: 2 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 5–7...
Page 170: Sntp Protocol
SNTP Protocol 850 Feeder Protection System relays accept time synchronization from up to two different SNTP servers. In order to define number of SNTP servers to be used, different settings for each SNTP server must be configured.
Page 171 - Non-alphabetic characters (for example, ~, !, @, #, $,%, &) PASSWORD RECOVERY PROCEDURE In the event of losing all passwords, the 850 can be reset to factory defaults by following the procedure below: Send an email to the customer support department providing a valid serial number and using a recognizable corporate email account.
Page 172: Basic Security
When the Operator PIN password is enabled, a virtual numeric keypad is shown instead of a virtual keyboard. By default, Operator PIN password is disabled. Changing this setting changes the Operator password to the default “0”. 5–10 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 173 REQUIRE PW FOR CONTROL If this setting is disabled, Operator controls do not require a password. If this setting is enabled, the Operator password is required. By default Require PW for Control is enabled. 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 5–11...
Page 174: Cybersentry
Commands may be issued freely through protocols other than Modbus (e.g., DNP, IEC 104, FASTPATH: and, IEC 61850) without user-authentication or encryption of data taking place, even if the relay has the advanced security feature enabled. 5–12 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 175 If the wrong password is entered, an “Authentication Failed!” message is displayed. – If the maximum failed authentications occur, the “Account Blocked!” message is displayed. – The Observer is the default choice and it does not require a password. 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 5–13...
Page 176 The Access timeout is the time of idleness before a logged in user is automatically logged out. This timeout setting applies to all users, independent of the communication channel (serial, Ethernet or direct access). 5–14 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 177 The two menu items: Change Administrator Password, and Change Operator Password are available only to Administrator, which is the only role that has permissions to change passwords for itself and the other local roles. 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 5–15...
Page 178 For this reason, if these settings have been modified, offline, NOTE they will not be written during the file write operation. 5–16 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 179 The following are settings that need to be configured through EnerVista, in order to set up communication with a Radius server on 850. For configuring the RADIUS server itself, consult the RADIUS documentation. An example is provided, see Communications Guide.
Page 180 Warning (4) An event to indicate when a certain role logged out or timed out. RADIUS_UNREACH, ORIGIN, Critical (2) RADIUS server is unreachable. Origin: RADIUS TIMESTAMP: server IP address and port number. 5–18 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 181: Communications
Modbus is a single master / multiple slave type of protocol suitable for a multi-drop configuration. The 850 is always a Modbus slave with a valid slave address range 1 to 254. DATA FRAME FORMAT AND DATA RATE One data frame of an asynchronous transmission to or from an 850 typically consists of 1 start bit, 8 data bits, and 1 stop bit.
Page 182 Range: 1 to 254 in steps of 1 Default: 254 For the RS485 ports each 850 must have a unique address from 1 to 254. Address 0 is the broadcast address to which all Modbus slave devices listen. Addresses do not have to be sequential, but no two devices can have the same address, otherwise conflicts resulting in errors occur.
Page 183: Rs485
850. ILLEGAL DATA ADDRESS The address referenced in the data field transmitted by the master is not an allowable address for the 850. ILLEGAL DATA VALUE The value referenced in the data field transmitted by the master is not within range for the selected data address.
Page 184 When choosing a new passphrase, the password complexity rules of CyberSentry must be used (see CyberSentry details in the relay Instruction manual). This field is visible only if the security is set to WPA2-PSK. 5–22 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 185: Wifi Quick Start Procedure
EnerVista for initial configuration and commissioning. Once the relay is configured, change the 8 Series relay default WiFi SSID and Passphrase settings before the relay goes into service. 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 5–23...
Page 186: Usb
Ethernet port located on the base CPU is disabled) Protocols: Modbus TCP, DNP 3.0, IEC 60870-5-104, IEC 61850 GOOSE, IEEE 1588, SNTP, IEC 62439-3 clause 4 (PRP) Wavelength: 1310 nm Typical link distance: 4 km 5–24 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 187: Network Settings Menu
DEVICE Network Settings Menu The following are the network settings menu of the 850 to accommodate the features of the 850 product. If the communications card is installed network port 1 is no longer available. When using more than one Ethernet port, configure each to belong to a different network or subnet using the IP addresses and mask, else communication becomes unpredictable when more than one port is configured to the same subnet.
Page 188: Routing
LAN’s. In this mode of operation both ports cannot be connected to the same LAN. The receiving devices (850 ) process the first frame received and discard the duplicate through a link redundancy entity (LRE) or similar service that operates below layer 2.
Page 189 255.255.255.0 The route destination must not be a connected network. The route gateway must be on a connected network. This rule applies to the gateway address of the default route as well. 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 5–27...
Page 190 This gateway is the address of Router 2, which is “aware” of destination 10.1.3.0 and is able to route packets coming from the 8 Series device and destined to EnerVista. 5–28 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 191: Dnp Protocol
Range: 0 to 65519 in steps of 1 Default: 65519 The DNP address sets the DNP slave address. This number identifies the 850 on a DNP communications link. Each DNP slave must be assigned a unique address. DNP Client Address 1(2) Range: standard IP address Default: 0.0.0.0...
Page 192: Dnp / Iec104 Point Lists
This setting specifies a time delay for the detection of dead network TCP connections. If there is no data traffic on a DNP TCP connection for greater than the time specified by this setting, the connection will be aborted by the 850. This frees up the connection to be re-used by a client.
Page 193 FACTOR setting is set to “/ 1000”, and the Phase A voltage is 72000 V, the Phase A voltage sent on to the 850 is 72 V. The settings are useful when analog input values must be adjusted to fit within certain ranges in DNP masters.
Page 194 When a freeze function is performed on a Binary Counter point, the frozen value is available in the corresponding Frozen Counter point. 850 Digital Counter values are represented as 16 or 32-bit integers. The DNP 3.0 protocol defines counters to be unsigned integers.
Page 195: Iec 60870-5-104
The IEC 60870-5-104 communications protocol is supported on Ethernet ports 4 and 5 only. Setting changes become active after rebooting. In 850 both DNP and IEC104 protocol can work at the same time, but consider that there is FASTPATH: only one point map. So, the two protocols use the same data mapping, i.e., same point index and same point source.
Page 196 “Network - TCP”, the IEC104 protocol can be used over TCP/IP on channels 1 or 2. The IEC104 NETWORK CLIENT ADDRESS settings can force the 850 to respond to a maximum of two specific IEC104 masters which own the configured IP Addresses. The settings in this sub-menu are shown below.
Page 197: Iec 60870-5-103
Setup software. A rebooting MUST be done before any changes made take affect. The IEC 61850 Configurator The 850 supports the IEC 61850 protocol which is identified by order code option “2E”. The IEC 61850 configurator is found in both the online and offline section of the EnerVista 8 Series Setup software for configuring the online 850 and offline 850 settings file respectively.
Page 198 Read Device Settings: The menu option reads all the settings from the relay by TFTP and creates an 850 file with extension *.CID. The created *.CID file consists of two sections. A private section where all non IEC 61850 settings are available, and a public section in which IEC 61850 related settings are implemented.
Page 199: Iec 61850 Configurator Details
61850 Configurator is open. Close the IEC61850 session to perform other operations in the EnerVista software. The IEC 61850 configurator consists of five sections: • ICD/CID • Settings • Reports • GOOSE Reception • GOOSE Transmission 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 5–37...
Page 200: Remote Modbus Device
Range: 0 to 10000 in steps of 1 Default: 502 POLL RATE Range: OFF, 3 to 120 minutes in steps of 1 Default: 3 minutes TRIGGER Range: Any FlexLogic operand fault: Off 5–38 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 201: Transient Recorder
TRIGGER ON ANY PICKUP Range: On, Off Default: Off Selection of “On” setting enables triggering of the recorder upon pickup condition detected by any of the protection or control elements. 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 5–39...
Page 202: Data Logger
“Continuous”, the data logger actively records any configured channels at the rate defined in the Data Logger Rate setting. The data logger is idle in this mode if no channels are configured. When set to “Triggered”, the data logger begins to record any 5–40 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 203 The parameters available in a given relay are dependent on: the type of relay, the type and number of CT/VT hardware installed, and the type and number of Analog Inputs hardware installed. Upon startup, the relay automatically prepares the parameter list. 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 5–41...
Page 204 “Rate”. The mean (average) is calculated simply using the well known ratio between the sum of all the values and their number over the time interval. Figure 5-8: Data Logger Storage Capacity 5–42 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 205: Fault Reports
DEVICE Fault Reports The 850 relay supports up to 15 fault reports and an associated fault locator before overwriting the oldest one. The trigger conditions and the characteristics of the feeder, as well as the analog quantities to be stored, are entered in this menu.
Page 206 V0. The method is still exact, as the fault locator would combine the line-to-line voltage measurements with the neutral voltage measurement to re-create the line-to- ground voltages. It is required to configure the delta and neutral voltages under the 5–44 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 207: Event Data
Snapshot.txt file is deleted. The Event Record remains as is and is not cleared. Path: Setpoints > Device > Event Data PARAMETER 1 to 64 Range: Off, any FlexAnalog Parameter Default: Off 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 5–45...
Page 208: Flex States
LED 5 (17) NAME LED 5 (24) NAME Range: Up to 13 alphanumeric characters Default: LED 5 The setpoint is used to select the LED name by choosing up to 13 alphanumeric characters. 5–46 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 209 Table 5-6: Default LED setpoints for 10 Pushbutton Membrane Front Panel Name Color Trigger Type LED1 See Note 1 LED2 LED3 LED4 LED5 TEST MODE Orange Testing ON Self-Reset LED6 MESSAGE Orange Active Target Self-Reset 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 5–47...
Page 210 LED 4: PICKUP – non-programmable. The LED is hardcoded to show a green light when at least one element has picked up. Note 2: LED 13 and LED 14 are not available for the 10 Pushbutton Membrane Front Panel. 5–48 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 211: Programmable Pushbuttons
It can also be programmed to Reset automatically through the PB 1 AUTORESET and PB 1 AUTORESET DELAY settings. These settings enable the auto- reset timer and specify the associated time delay. The auto-reset timer can be used in 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 5–49...
Page 212 Hot Line Tag (PB6), Demand Reset (PB7), Alt Settings (PB8), Target Reset (PB9), PB Block (PB10) This setting specifies the 13-character line of the user-programmable message and is intended to provide the ID information of the pushbutton. 5–50 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 213 Range: Off, Any FlexLogic operand Default: Off This setting assigns a FlexLogic operand serving to inhibit pushbutton operation from the front panel pushbuttons. This locking functionality is not applicable to pushbutton autoreset. 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 5–51...
Page 214 PB10 ON PB10 ON PB10 ON PB10 ON PB10 ON Dropout 0.0s 0.0s 0.0s 0.0s 0.0s 0.0s 0.0s 0.0s 0.0s 0.0s Time Events Enabled Enabled Enabled Enabled Enabled Enabled Enabled Enabled Enabled Enabled 5–52 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 215 CHAPTER 5: DEVICE, SYSTEM, INPUT AND OUTPUT SETPOINTS DEVICE Figure 5-10: Pushbuttons Logic Diagram 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 5–53...
Page 216: Ten (10) Pushbutton Membrane Front Panel Defaults
This can be implemented in Setpoints > Control > Autoreclose 1 > Setup > Reduce Maximum To 1 by assigning the PB6 ON (Hot Line Tag) operand. 5–54 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 217: Annunciator
Layout - If the grid layout is selected to be 3x3, the annunciator has 4 pages. If the grid layout is 2x2, the annunciator has 9 pages. The numbering of the indicators is shown as follows. 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 5–55...
Page 218 Setpoints > Device > Front Panel > Annunciator > Indicator 1(36) ALARM INPUT Range: Off, any FlexLogic Operand Default: Off This setting specifies the input operand used to activate the corresponding indicator. 5–56 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 219 Enter key again acknowledges the alarm and pressing the Escape button discards the message. When the alarms are active under latched mode, a power loss retains the previous state of the alarm as the alarm states are stored in non-volatile memory. 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 5–57...
Page 220: Tab Pushbuttons
The state of each pushbutton is stored in non-volatile memory and maintained through the loss of control power. Path: Setpoints > Device > Front Panel > Tab PBs > Tab PB1(X) 5–58 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 221 Range: Black, Red, Yellow, Blue, Green, Teal, Purple, White Default: Black This setting specifies the background color of the Tab Pushbutton. If the button is disabled, the button color by default is shown as grey. 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 5–59...
Page 222 “active” status after the pushbutton has been released. The length of time the operand remains on has no effect on the pulse duration. The setting is required to set the duration of the pushbutton operating pulse. EVENTS Range: Disabled, Enabled Default: Enabled 5–60 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 223: Display Properties
LANGUAGE Range: English, German, Polish Default: English This setting selects the language used to display the settings, metering, status, and targets. The range is dependent on the order code of the relay. 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 5–61...
Page 224: Default Screens
The selected object must first be de-selected by pressing the escape button to be able to use the home button functionality again. NOTE Path: Setpoints > Device > Front Panel > Home Screens 5–62 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 225: Clear Records
Default: Off The setpoint selects an operand from the list of FlexLogic operands. The targets, LEDs, and latched output relays reset upon assertion from any of the operands selected as Reset Inputs. 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 5–63...
Page 226: Installation
Lower the Voltage Cutoff and Current Cutoff levels with care as the relay accepts lower FASTPATH: signals as valid measurements. Unless dictated otherwise by a specific application, the default settings of “0.020 pu” for current and “1.0 V” for voltage are recommended.” 5–64 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 227: System
The 850-P Multi Feeder Protection System supports up to four three-phase currents in slots J and K. The single AC input from the card inserted in slot K for 850-D and 850-E is used to connect to the sensitive ground CT for measuring small currents which cannot be correctly measured by a standard type of current input.
Page 228: Voltage Sensing
The cut-off for current measurements is 0.02 x CT. This is the minimum value above which FASTPATH: metering functions. The Setpoints > System > Current Sensing > CT Bank 3 -K2 option is available in 850 with NOTE: order code option R1/R5 for Phase Current Slot K.
Page 229 115/√3 = 66.4 V. On a 14.4 kV system with a Delta connection and a VT primary to secondary turns ratio of 14400:120, the voltage value entered would be 120 V, i.e. 14400/120. 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 5–67...
Page 230: Lea (Low Energy Analog)
CHAPTER 5: DEVICE, SYSTEM, INPUT AND OUTPUT SETPOINTS LEA (Low Energy Analog) The 850-P can be connected to 6 LEA voltage inputs (two 3-phase voltage banks, LEA Bnk1-J2 and LEA Bnk2-J2). The LEA voltage inputs setup for the 850-P is shown below: Path: Setpoints >...
Page 231: Power System
Range: 0.500 to 1.500 in steps of 0.001 Default: 1.000 The 850 uses magnitude and phase correction factors to correct for manufacturing tolerances in the line-sensing equipment. This setting specifies the correction magnitude that must be applied for the measurement taken from the VT1/2/3 input.
Page 232: Breakers
52a, and 52b. However using only one of them is also acceptable. The 850-E and 850-D single feeder relays have one controllable breaker. The 850-D dual feeder and 850-P relays have two controllable breakers.
Page 233 Figure 5-14: Breaker LEDs Figure 5-15: Breaker Connected/Disconnected (Racked-In/Racked-Out) Detection FlexLogic operand status FLEXLOGIC OPERANDS BKR 1 Disconnected SETPOINT FLEXLOGIC OPERANDS BKR 1 CONNECTED BKR 1 Connected FlexLogic operand =1, Off = 0 894207A1.cdr 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 5–71...
Page 234 PB LED: BREAKER OPENED FLEXLOGIC OPERANDS FlexLogic operand (BKR 52a state) BKR 1 Opened FlexLogic operand (BKR 52b status) LED: ALARM 30 ms FLEXLOGIC OPERANDS LATCH BKR 1 Unkwn State 892740A2.cdr RESET (command) 5–72 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 235: Switches
Select an operand from the list of FlexLogic operands, which when asserted resets the Switch Discrepancy state. Please note that resetting the discrepancy alarm will work only after no discrepancy condition exists between the switch aux contacts 89a and 89b. 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 5–73...
Page 236 89b contact open Not Configured Table 5-12: Switch status with both contacts 89a and 89b programmed 89a Contact Status 89b Contact Status Disconnect Switch Status SW[X] Opened SW[X] Closed SW[X] Intermittent, SW[X] Discrepancy 5–74 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 237 CHAPTER 5: DEVICE, SYSTEM, INPUT AND OUTPUT SETPOINTS SYSTEM Figure 5-17: Disconnect Switch State Detection logic diagram 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 5–75...
Page 238: Flexcurves
(for I > I ) or the reset (for I < I ) is required. pickup pickup 5–76 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 239 FlexCurves A, B, C, and D are customized by editing the operating time (ms) values at pre- defined per-unit current multiples. Note that the pickup multiples start at zero (implying the "reset time"), operating time below Pickup, and operating time above Pickup. RECLOSER CURVE EDITING 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 5–77...
Page 240 (8) times Pickup with an operating time of 30 ms. At approximately four (4) times Pickup, the curve operating time is equal to the MRT and from then onwards the operating time remains at 200 ms (see below). 5–78 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 241 If this is attempted, the EnerVista 8 Series Setup software generates an error message and discards the proposed changes. STANDARD RECLOSER CURVES The standard recloser curves are displayed in the following graphs. 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 5–79...
Page 242 GE105 GE104 0.05 GE102 GE101 0.02 0.01 7 8 9 10 12 CURRENT (multiple of pickup) 842723A1.CDR Figure 5-22: Recloser Curves GE113, GE120, GE138 AND GE142 0.05 7 8 9 10 12 5–80 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 243 7 8 9 10 12 CURRENT (multiple of pickup) 842730A1.CDR Figure 5-24: Recloser Curves GE131, GE141, GE152, AND GE200 GE152 GE141 GE131 GE200 7 8 9 10 12 CURRENT (multiple of pickup) 842728A1.CDR 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 5–81...
Page 244 CURRENT (multiple of pickup) 842729A1.CDR Figure 5-26: Recloser Curves GE116, GE117, GE118, GE132, GE136, AND GE139 GE132 GE139 GE136 GE116 0.05 GE117 GE118 0.02 0.01 7 8 9 10 12 CURRENT (multiple of pickup) 842726A1.CDR 5–82 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 245 0.01 7 8 9 10 12 CURRENT (multiple of pickup) 842724A1.CDR Figure 5-28: Recloser Curves GE119, GE135, AND GE202 GE202 GE135 GE119 7 8 9 10 12 CURRENT (multiple of pickup) 842727A1.CDR 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 5–83...
Page 246: Inputs
INPUTS CHAPTER 5: DEVICE, SYSTEM, INPUT AND OUTPUT SETPOINTS Inputs Figure 5-29: Inputs Display Hierarchy 5–84 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 247: Contact Inputs
INPUTS Contact Inputs The 850 relay is equipped with a number of Contact Inputs, depending on the Order Code, which can be used to provide a variety of functions such as for circuit breaker control, external trips, blocking of protection elements, etc. Contact inputs accept wet and dry input signals.
Page 248 Contact Inputs (Slot F/G/H with order code ‘A’ or ‘M’ or ‘F’) or for each group of Contact Inputs (Slot F/G/H with order code ‘B’ or ‘K’ and Slot B/C with order code ‘C’). 5–86 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 249 As this time differs for different contact types and manufacturers, set it as a maximum contact debounce time (per manufacturer specifications) plus some margin to ensure proper operation. EVENTS Range: Enabled, Disabled Default: Enabled 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 5–87...
Page 250: Virtual Inputs
The 52b contact is closed when the breaker is open and open when the breaker is closed. FASTPATH: Virtual Inputs The 850 relay is equipped with 64 Virtual Inputs that can be individually programmed to respond to input signals from the keypad or from communications protocols. This has the following advantages over Contact Inputs only: •...
Page 251 FUNCTION : Disabled=0 Enabled =1 Virtual Input 1 to ON =1 LATCH FlexLogic Operands Reset- Virtual Input 1 to OFF =0 VI 1 ON Dominant SETPOINTS VIRTUAL INPUT 1 TYPE: Latched 892705A1.cdr Self-Reset 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 5–89...
Page 252: Analog Inputs
4 to 20 mA for temperatures 0 to 250°C is connected to the analog input, then enter “0” for the MINIMUM VALUE. The relay then interprets 4 mA as representing 0°C. Intermediate values between the minimum and maximum are scaled linearly. 5–90 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 253 TRIP OUTPUT RELAY X For details see Common Setpoints. ALARM FUNCTION Range: Disabled, Alarm, Latched Alarm Default: Disabled The selection of Alarm or Latched Alarm setting enables the alarm function. 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 5–91...
Page 254 This setting enables or disables the events of the Analog Input function. TARGETS Range: Disabled, Self-Reset, Latched Default: Latched The selection of the Self-Reset or Latched setting enables the targets of the Analog Input function. 5–92 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 255 CHAPTER 5: DEVICE, SYSTEM, INPUT AND OUTPUT SETPOINTS INPUTS Figure 5-32: Analog Input Threshold Logic Diagram 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 5–93...
Page 256: Remote Inputs
An alphanumeric name may be assigned to a Remote Input for diagnostic, setting, and event recording purposes. EVENTS Range: Enabled, Disabled Default: Enabled This setting enables event generation whenever Remote Input Status is updated. 5–94 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 257: Outputs
The card A I/O module from slot F, for example, provides five output relays. The first output relay (Relay 1) in the 850 is a Form A relay that can be used for Trip Coil monitoring, and is designated for tripping the breaker. The relay is energized upon operation of any element with setpoint Function set to "Trip".
Page 258 Switch, and vice versa. The table below defines the dependency of output relay availability based on the first come-first serve principal. 5–96 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 259 NOTE MAINTAINING AN UNINTERRUPTED PROCESS The Output Relays are operational (can be closed/opened) while the 850 Feeder Protection System is In-Service. If the relay goes into “Out-of-Service” mode, the status of all previously energized output relays changes to de-energized. If an output relay was used to maintain a running process, or to hold a motor contactor while energized, the process or the motor contactor will be interrupted.
Page 260: Output Relay 1 (F1) Trip
(if not already activated by an operand driving this output relay) when control power is removed from the 850. Conversely a non-failsafe relay is de-energized in its normal non-activated state and will not change state when control power is removed from the 850 (if not already activated by a protection element).
Page 261 Figure 5-35: Relay 1 “TRIP” Selected for Breaker 1 logic diagram 869 only Note: When Contactor is selected as a Switching Device, all the inputs associated with Contactor are used by the ‘Trip’ logic. 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 5–99...
Page 262: Output Relay 2 (F4) Programmed As Close
If Aux Relay 2 is selected for Breaker Close or Contactor Close, the relay name from the NOTE: For Output Relays menu changes to “Close”. If Aux Relay 2 is not selected, the name reverts to “Aux Relay 2”. NOTE 5–100 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 263 Figure 5-36: “Close” Selected for Breaker 1 logic diagram 869 only Note: When Contactor is selected as a Switching Device, all the inputs associated with Contactor are used by the ‘Trip’ logic. 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 5–101...
Page 264: Auxiliary Output Relays
FlexLogic operand (trigger) under the setpoint “Aux Rly # Operate”. Changing the state of any of the Auxiliary Relays will be inhibited if the 850 relay is in “Not Ready” mode. NAME...
Page 265: Critical Failure Relay #8
Relay ( Ready = 1) Critical Failure Relay The 850 relay is equipped with one output relay (# 8 - “Critical Failure Relay”) for failsafe indication. The Critical Failure Relay is a Form-C contact with one NO and one NC contact (no control power).
Page 266: Virtual Outputs
CHAPTER 5: DEVICE, SYSTEM, INPUT AND OUTPUT SETPOINTS Virtual Outputs The 850 relay is equipped with 96 virtual outputs that may be assigned for use via FlexLogic. Virtual outputs not assigned for use are set to OFF (Logic 0). A name can be assigned to each virtual output. Any change of state to a virtual output can be logged as an event if programmed to do so.
Page 267: Analog Outputs
Each channel can be programmed to represent a FlexAnalog parameter available in the respective 8 Series relay. The range and steps is the same as the range of the FlexAnalog. 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 5–105...
Page 268 OUTPUTS CHAPTER 5: DEVICE, SYSTEM, INPUT AND OUTPUT SETPOINTS 5–106 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 269 Grid Solutions 850 Feeder Protection System Chapter 6: Protection Setpoints Protection Setpoints The 850 protection elements are organized in six (6) identical setpoint groups: Setpoint Group 1 to Setpoint Group 6. Figure 6-1: Protection Display Hierarchy Setpoints Device Undercurrent System...
Page 270 • Neutral Admittance (21YN) Power Elements • Directional Power (32) • Wattmetric Ground Fault (32N) Frequency Elements • Underfrequency (81U) • Overfrequency (81O) • Frequency Rate of Change (81R) • Fast Underfrequency 6–2 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 271 The relay has six setpoint groups with several protection elements repeated in each group. (Available protection elements depend on the 850 model: 850D, 850E, or 850P, and on the exact relay order code.)The programming of the time-current characteristics of these elements is identical in all cases and is only covered in this section.
Page 272 I = input current = Pickup Current setting pickup A, B, p = constants = reset time in seconds (assuming energy capacity is 100% and RESET is RESET “Timed”) = characteristic constant 6–4 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 273 TDM = Multiplier setting I = input current = Pickup Current setting pickup A to E = constants = reset time in seconds (assuming energy capacity is 100% and RESET is RESET “Timed”) 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 6–5...
Page 274 0.986 8.106 4.544 2.866 2.291 1.994 1.812 1.689 1.600 1.532 1.479 10.807 6.059 3.821 3.054 2.659 2.416 2.252 2.133 2.043 1.972 10.0 13.509 7.574 4.776 3.818 3.324 3.020 2.815 2.666 2.554 2.465 6–6 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 275 6.400 2.667 1.000 0.533 0.333 0.229 0.167 0.127 0.100 0.081 0.20 12.800 5.333 2.000 1.067 0.667 0.457 0.333 0.254 0.200 0.162 0.40 25.600 10.667 4.000 2.133 1.333 0.914 0.667 0.508 0.400 0.323 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 6–7...
Page 276 A to E = constants = characteristic constant = reset time in seconds (assuming energy capacity is 100% and RESET is RESET “Timed”) Table 6-8: GE TYPE IAC INVERSE TIME CURVE CONSTANTS IAC CURVE SHAPE IAC Extremely Inverse 0.0040 0.6379 0.6200 1.7872...
Page 277 0.44 0.25 0.11 0.06 0.04 0.03 0.02 0.02 0.01 0.01 0.10 4.44 2.50 1.11 0.63 0.40 0.28 0.20 0.16 0.12 0.10 1.00 44.44 25.00 11.11 6.25 4.00 2.78 2.04 1.56 1.23 1.00 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 6–9...
Page 278 T = operate time (in seconds), TDM = Multiplier setting, I = input current, = Pickup Current setting, pickup = reset time in seconds (assuming energy capacity is 100% and RESET is RESET “Timed”) 6–10 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 279: Percent Of Load-To-Trip
“0”. Phase Time Overcurrent Protection (51P) The 850 relay TOC element can be configured with any of the IEEE, ANSI, IEC, and IAC standard inverse curves, any of the four FlexCurves, or set to definite time. The selection of...
Page 280 (around 50% of) the fault current. Refer IEEE C37.102-2006, Annex-A for more details. 6–12 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 281 Setpoints > System > Current Sensing > [Name] > VT Bank Name. BLOCK Range: Off, Any FlexLogic operand Default: Off OUTPUT RELAY X For details see Common Setpoints. EVENTS Range: Enabled, Disabled Default: Enabled TARGETS Range: Self-reset, Latched, Disabled Default: Self-reset 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 6–13...
Page 282 CURRENT ELEMENTS CHAPTER 6: PROTECTION SETPOINTS Figure 6-4: Phase Time Overcurrent Protection logic diagram 6–14 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 283: Phase Instantaneous Overcurrent Protection (50P)
CURRENT ELEMENTS Phase Instantaneous Overcurrent Protection (50P) The 850 IOC element consists of the equivalent of three separate instantaneous overcurrent relays (one per phase) - ANSI device 50P - all with identical characteristics. The settings of this function are applied to each of the three phases to produce Pickup and Trip flags per phase.
Page 284 CURRENT ELEMENTS CHAPTER 6: PROTECTION SETPOINTS Figure 6-5: Phase Instantaneous Overcurrent logic diagram 6–16 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 285: Phase Directional Overcurrent Protection (67P)
CURRENT ELEMENTS Phase Directional Overcurrent Protection (67P) The 850 Phase Directional Overcurrent protection elements (one for each of phases A, B, and C) determine the phase current flow direction for steady state and fault conditions and can be used to control the operation of the phase overcurrent elements by sending directional bits to inputs of these elements.
Page 286 10 ms must therefore be added to all the instantaneous protection elements under the supervision of the Phase Directional element. If current reversal is a concern, a longer delay – in the order of 20 ms – is needed. 6–18 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 287 CHAPTER 6: PROTECTION SETPOINTS CURRENT ELEMENTS Figure 6-6: Phase Directional Overcurrent Protection logic diagram 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 6–19...
Page 288: Neutral Time Overcurrent Protection (51N)
CURRENT ELEMENTS CHAPTER 6: PROTECTION SETPOINTS Neutral Time Overcurrent Protection (51N) The 850 computes the neutral current (In) using the following formula: |In|=|Ia+Ib+Ic| The settings of this function are applied to the neutral current to produce Trip or Pickup flags. The Neutral TOC Pickup flag is asserted when the neutral current is above the PKP value.
Page 289 Range: Disabled, Forward (Ntrl Dir OC [1-4] FWD), Reverse (Ntrl Dir OC [1-4] REV) Default: Disabled BLOCK Range: Off, Any FlexLogic operand Default: Off OUTPUT RELAY X For details see Common Setpoints. EVENTS Range: Enabled, Disabled Default: Enabled TARGETS Range: Self-reset, Latched, Disabled Default: Self-reset 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 6–21...
Page 290 CURRENT ELEMENTS CHAPTER 6: PROTECTION SETPOINTS Figure 6-7: Neutral Time Overcurrent Protection logic diagram 6–22 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 291: Neutral Instantaneous Overcurrent Protection (50N)
CHAPTER 6: PROTECTION SETPOINTS CURRENT ELEMENTS Neutral Instantaneous Overcurrent Protection (50N) The 850 Neutral Instantaneous Overcurrent protection element computes the neutral current (In) using the following formula: |In| = |Ia + Ib + Ic| The element essentially responds to the magnitude of a neutral current fundamental frequency phasor calculated from the phase currents.
Page 292 CHAPTER 6: PROTECTION SETPOINTS BLOCK Range: Off, Any FlexLogic operand Default: Off OUTPUT RELAY X For details see Common Setpoints. EVENTS Range: Enabled, Disabled Default: Enabled TARGETS Range: Self-reset, Latched, Disabled Default: Self-reset 6–24 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 293 CHAPTER 6: PROTECTION SETPOINTS CURRENT ELEMENTS Figure 6-8: Neutral Instantaneous Overcurrent Protection logic diagram 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 6–25...
Page 294: Neutral Directional Overcurrent Protection (67N)
CHAPTER 6: PROTECTION SETPOINTS Neutral Directional Overcurrent Protection (67N) The 850 Neutral Directional Overcurrent protection element provides both forward and reverse fault direction indications: the Ntrl Dir OC FWD and Ntrl Dir OC REV, respectively. The output operands are asserted if the magnitude of the operating current is above a Pickup level (overcurrent unit) and the fault direction is seen as forward or reverse, respectively (directional unit).
Page 295 -3V_0 line REV LA FWD LA line line (reference) REV Operating FWD Operating Region Region 3I_0 line ECA line -ECA line -3I_0 line REV LA FWD LA line line 3V_0 line 827805A1.CDR 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 6–27...
Page 296 The polarizing voltage can be programmed to be either the zero- sequence voltage calculated from the phase voltages ("Calculated V_0") or supplied externally as an auxiliary voltage ("Measured VX") 6–28 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 297 When selecting this setting it must be kept in mind that the design uses a ‘positive-sequence restraint’ technique for the “Calculated 3I0” mode of operation. BLOCK Range: Off, Any FlexLogic operand Default: Off EVENTS Range: Enabled, Disabled Default: Enabled TARGETS Range: Self-reset, Latched, Disabled Default: Self-reset 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 6–29...
Page 298 CURRENT ELEMENTS CHAPTER 6: PROTECTION SETPOINTS Figure 6-10: Neutral Directional Overcurrent Protection logic diagram 6–30 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 299: Ground Time Overcurrent Protection (51G)
CURRENT ELEMENTS Ground Time Overcurrent Protection (51G) The 850 is equipped with the Ground Time Overcurrent protection element. The settings of this function are applied to the ground input current to produce Trip or Pickup flags. The Ground TOC Pickup flag is asserted when the ground current is above the PKP value. The Ground TOC Trip flag is asserted if the element stays picked up for the time defined by the selected inverse curve and the magnitude of the current.
Page 300 CURRENT ELEMENTS CHAPTER 6: PROTECTION SETPOINTS EVENTS Range: Enabled, Disabled Default: Enabled TARGETS Range: Self-reset, Latched, Disabled Default: Self-reset 6–32 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 301 CHAPTER 6: PROTECTION SETPOINTS CURRENT ELEMENTS Figure 6-11: Ground Time Overcurrent Protection logic diagram 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 6–33...
Page 302: Ground Instantaneous Overcurrent Protection (50G)
CHAPTER 6: PROTECTION SETPOINTS Ground Instantaneous Overcurrent Protection (50G) The 850 relay is equipped with the Ground Instantaneous Overcurrent protection element. The settings of this function are applied to the measured Ground current for producing Pickup and Trip flags. The Ground IOC Pickup flag is asserted when the Ground current is above the PKP value.
Page 303 CHAPTER 6: PROTECTION SETPOINTS CURRENT ELEMENTS Figure 6-12: Ground Instantaneous Overcurrent Protection logic diagram 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 6–35...
Page 304: Ground Directional Overcurrent Protection (67G)
CHAPTER 6: PROTECTION SETPOINTS Ground Directional Overcurrent Protection (67G) The 850 Ground Directional Overcurrent protection element. It provides both forward and reverse fault direction indications: the Gnd Dir OC FWD and Gnd Dir OC REV operands, respectively. The output operands are asserted if the magnitude of the operating current is above a Pickup level (overcurrent unit) and the fault direction is seen as forward or reverse, respectively (directional unit).
Page 305 Default: CT Bank 1-J1 This setting provides the selection for the current input bank. The default bank names can be changed in: Setpoints > System > Current Sensing > [Name] > CT Bank Name. 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 6–37...
Page 306 When signal input is J1 in the ground directional element, Current Input is J1-CT ground NOTE: current, and Polarizing current input is K1-CT ground current. When signal input is K1 for the dual feeder 850-D, Current Input is K1-CT ground current, and Polarizing current input NOTE is J1-CT ground current.
Page 307 This setting defines the Pickup level for the overcurrent unit of the element in the reverse direction. BLOCK Range: Off, Any FlexLogic operand Default: Off EVENTS Range: Enabled, Disabled Default: Enabled TARGETS Range: Self-reset, Latched, Disabled Default: Self-reset 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 6–39...
Page 308 CURRENT ELEMENTS CHAPTER 6: PROTECTION SETPOINTS Figure 6-14: Ground Directional Overcurrent Protection logic diagram 6–40 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 309: Sensitive Ground Time Overcurrent Protection (51Sg)
CURRENT ELEMENTS Sensitive Ground Time Overcurrent Protection (51SG) The 850 is equipped with the Sensitive Ground Time Overcurrent protection element. The settings of this function are applied to the Sensitive Ground input current to produce Trip or Pickup flags. The Sensitive Ground TOC Pickup flag is asserted when the Sensitive Ground current is above the PKP value.
Page 310 The selection of the Enabled setting enables the events of Sensitive Ground TOC function. TARGETS Range: Self-reset, Latched, Disabled Default: Self-reset The selection of Self-reset or Latched settings enables the targets of the Sensitive Ground TOC function. 6–42 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 311 CHAPTER 6: PROTECTION SETPOINTS CURRENT ELEMENTS Figure 6-15: Sensitive Ground Time Overcurrent Protection logic diagram 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 6–43...
Page 312: Sensitive Ground Instantaneous Overcurrent Protection (50Sg)
CHAPTER 6: PROTECTION SETPOINTS Sensitive Ground Instantaneous Overcurrent Protection (50SG) The 850 relay is equipped with Sensitive Ground Instantaneous Overcurrent protection element. The settings of this function are applied to the measured Sensitive Ground current for producing Pickup and Trip flags. The Sensitive Ground IOC Pickup flag is asserted when the Sensitive Ground current is above the PKP value.
Page 313 CHAPTER 6: PROTECTION SETPOINTS CURRENT ELEMENTS TARGETS Range: Self-reset, Latched, Disabled Default: Self-reset 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 6–45...
Page 314 CURRENT ELEMENTS CHAPTER 6: PROTECTION SETPOINTS Figure 6-16: Sensitive Ground Instantaneous Overcurrent Protection logic diagram 6–46 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 315: Sensitive Ground Directional Overcurrent Protection (67Sg)
CURRENT ELEMENTS Sensitive Ground Directional Overcurrent Protection (67SG) The 850 relay is equipped with the Sensitive Ground Directional Overcurrent protection element. It provides both forward and reverse fault direction indications: the S.Gnd Dir OC FWD and S.Gnd Dir OC REV operands, respectively. The output operands are asserted if the magnitude of the operating current is above a Pickup level (overcurrent unit) and the fault direction is seen as forward or reverse, respectively (directional unit).
Page 316 Wye. The auxiliary voltage can be used as the polarizing voltage if the auxiliary voltage is connected to a zero-sequence voltage source (such as the open delta connected secondary of VTs). 6–48 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 317 REVERSE LIMIT ANGLE Range: 40° to 90° in steps of 1° Default: 90° This setting defines a symmetrical (in both directions from the ECA) limit angle for the reverse direction. 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 6–49...
Page 318 This setting defines the Pickup level for the overcurrent unit of the element in the reverse direction. BLOCK Range: Off, Any FlexLogic operand Default: Off EVENTS Range: Enabled, Disabled Default: Enabled TARGETS Range: Self-reset, Latched, Disabled Default: Self-reset 6–50 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 319 CHAPTER 6: PROTECTION SETPOINTS CURRENT ELEMENTS Figure 6-18: Sensitive Ground Directional Overcurrent Protection logic diagram 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 6–51...
Page 320: Restricted Ground Fault (87G)
CHAPTER 6: PROTECTION SETPOINTS Restricted Ground Fault (87G) The 850 relay is equipped with the Restricted Ground Fault (RGF) element, sometimes referred to as the Restricted Earth Fault (REF) element. The Restricted Ground Fault (RGF) protection provides ground fault detection for low- magnitude ground fault currents primarily for ground faults close to the neutral point of the wye connected winding.
Page 321 CHAPTER 6: PROTECTION SETPOINTS CURRENT ELEMENTS 850 implementation of the Restricted Ground Fault protection is a low impedance current differential scheme. The 850 calculates the magnitude of the ground differential current as an absolute value from the vector summation of the computed residual current, and the measured ground current, and applies a restraining current defined as the maximum measured line current (Imax) to produce a percent slope value.
Page 322 CURRENT SUPERVISION is set to “Enabled”. BLOCK Range: Off, Any FlexLogic operand Default: Off OUTPUT RELAY X For details see Common Setpoints. EVENTS Range: Enabled, Disabled Default: Enabled TARGETS Range: Self-reset, Latched, Disabled Default: Self-reset 6–54 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 323 @ 30% load the slope setting would be: (36 / 208 A)*100 = 17% The ground current supervision feature and/or the RGF 1 Pickup time delay can be used if CT saturation due to heavy external fault, is a concern. 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 6–55...
Page 324 CURRENT ELEMENTS CHAPTER 6: PROTECTION SETPOINTS Figure 6-22: Restricted Ground Fault Protection Logic Diagram 6–56 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 325: Switch On To Fault (Sotf)
SOTF condition. To be in SOTF condition, the same phase for current and voltage have to be in SOTF condition. VTs should be connected to the line side and not the bus side for detection by voltage and FASTPATH: currents. 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 6–57...
Page 326 BLOCK Range: Off, Any FlexLogic operand Default: Off OUTPUT RELAY X For details see Common Setpoints. EVENTS Range: Disabled, Enabled Default: Enabled TARGETS Range: Disabled, Self-Reset, Latched Default: Latched 6–58 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 327 CHAPTER 6: PROTECTION SETPOINTS CURRENT ELEMENTS Figure 6-23: SOTF 1 - Logic Diagram 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 6–59...
Page 328: Negative Sequence Time Overcurrent Protection (51_2)
CHAPTER 6: PROTECTION SETPOINTS Negative Sequence Time Overcurrent Protection (51_2) The 850 relay is equipped with the Negative Sequence Time Overcurrent protection element. The Negative Sequence Time Overcurrent element may be used to determine and clear unbalance in the system. The input for computing negative-sequence current is the fundamental phasor value.
Page 329 CHAPTER 6: PROTECTION SETPOINTS CURRENT ELEMENTS OUTPUT RELAY X For details see Common Setpoints. EVENTS Range: Enabled, Disabled Default: Enabled TARGETS Range: Self-reset, Latched, Disabled Default: Self-reset 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 6–61...
Page 330 CURRENT ELEMENTS CHAPTER 6: PROTECTION SETPOINTS Figure 6-24: Negative Sequence Time Overcurrent Protection logic diagram 6–62 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 331: Negative Sequence Instantaneous Overcurrent Protection (50_2)
The Negative Sequence Instantaneous Overcurrent element may be used to determine and clear unbalance in the system. The input for computing negative sequence current is the fundamental phasor value. The 850 computes the negative sequence current magnitude |I_2| using the following formula: |I_2|=1/3*|Ia+Ib*(1∠240º)+Ic*(1∠120 º)|...
Page 332 Default: 0.000 s BLOCK Range: Off, Any FlexLogic operand Default: Off OUTPUT RELAY X For details see Common Setpoints. EVENTS Range: Enabled, Disabled Default: Enabled TARGETS Range: Self-reset, Latched, Disabled Default: Self-reset 6–64 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 333 CHAPTER 6: PROTECTION SETPOINTS CURRENT ELEMENTS Figure 6-25: Negative Sequence Instantaneous Overcurrent logic diagram 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 6–65...
Page 334: Negative Sequence Directional Overcurrent Protection (67_2)
CHAPTER 6: PROTECTION SETPOINTS Negative Sequence Directional Overcurrent Protection (67_2) The 850 relay is equipped with the Negative Sequence Directional Overcurrent protection element. The element provides both forward and reverse fault direction indications through its output operands Neg Seq Dir OC FWD and Neg Seq Dir OC REV, respectively.
Page 335 Range: dependant upon the order code Default: CT Bank 1 -J1 This setting provides a selection for the CT Bank input. The “Current Input” setting is omitted for 850 which is defaulted to CT Bank 1-J1. FASTPATH: 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 336 When selecting the setting it must be kept in mind that the design uses a positive- sequence restraint technique. BLOCK Range: Off, Any FlexLogic operand Default: Off EVENTS Range: Enabled, Disabled Default: Enabled TARGETS Range: Self-reset, Latched, Disabled Default: Self-reset 6–68 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 337 CHAPTER 6: PROTECTION SETPOINTS CURRENT ELEMENTS Figure 6-27: Negative Sequence Directional Overcurrent Protection logic diagram 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 6–69...
Page 338: Broken Conductor
When I_1 exceeds this setting, it is considered a fault. This broken conductor function should not respond to any fault conditions so normally the setting is programmed to less than the maximum load current. 6–70 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 339 Default: 20.000 s BLOCK Range: Off, Any FlexLogic operand Default: Off OUTPUT RELAY X For details see Common Setpoints. EVENTS Range: Enabled, Disabled Default: Enabled TARGETS Range: Self-reset, Latched, Disabled Default: Self-reset 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 6–71...
Page 340 CURRENT ELEMENTS CHAPTER 6: PROTECTION SETPOINTS Figure 6-28: Broken Conductor Protection logic diagram 6–72 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 341: Load Encroachment
CHAPTER 6: PROTECTION SETPOINTS CURRENT ELEMENTS Load Encroachment The 850 relay is equipped with the Load Encroachment element. The Load Encroachment element responds to the positive-sequence voltage and current and applies a characteristic shown in the figure below: Figure 6-29: Load Encroachment Characteristic...
Page 342 Common Setpoints. EVENTS Range: Disabled, Enabled Default: Enabled TARGETS Range: Disabled, Self-reset, Latched Default: Disabled As the Load Encroachment function operates during normal conditions it is recommended FASTPATH: that targets be disabled. 6–74 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 343 CHAPTER 6: PROTECTION SETPOINTS CURRENT ELEMENTS Figure 6-30: Load Encroachment logic diagram 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 6–75...
Page 344: Undercurrent (37)
CHAPTER 6: PROTECTION SETPOINTS Undercurrent (37) The 850 relay provides three Undercurrent elements per protection group. The Undercurrent element responds to a per-phase current. An alarm will occur if the magnitude of any phase current falls below the undercurrent alarm pickup level for the time specified by the undercurrent alarm delay.
Page 345 Setpoints. BLOCK Range: Off, Any FlexLogic operand Default: Off The Undercurrent can be blocked by any asserted FlexLogic operand. EVENTS Range: Disabled, Enabled Default: Enabled TARGETS Range: Disabled, Self-reset, Latched Default: Latched 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 6–77...
Page 346 CURRENT ELEMENTS CHAPTER 6: PROTECTION SETPOINTS Figure 6-31: Undercurrent logic diagram 6–78 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 347: Thermal Overload (49)
This setting provides selection for the current bank input. PICKUP Range: 0.050 to 30.000 x CT in steps of 0.001 x CT Default: 1.000 x CT This setting sets the Pickup level of the phase current. 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 6–79...
Page 348 CHAPTER 6: PROTECTION SETPOINTS In some applications, it may be necessary to apply the K-factor to compensate for any NOTE: current measurement inaccuracies from the relay. The 850 relay has the following accuracy for RMS values in current: NOTE ± 0.25% of reading or ± 0.2% of rated (whichever is greater) from 0.1 to 2.0 x CT ±...
Page 349 When set to “Latched”, the target message will remain visible after the element output returns to logic 0 until a RESET command is received by the relay. 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 6–81...
Page 350 CURRENT ELEMENTS CHAPTER 6: PROTECTION SETPOINTS Figure 6-32: Thermal Overload 1 Protection logic diagram 6–82 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 351: Voltage Elements
The element resets instantaneously if the applied voltage exceeds the dropout voltage. The delay setting selects the minimum operating time of the phase undervoltage. At 0% of Pickup, the operating time equals the Undervoltage Pickup Time Delay setpoint. NOTE: NOTE 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 6–83...
Page 352 1.1 x PKP (not at 0.82 x PKP). On the other hand, when the measured voltage is 1 x VT, the ratio is 0.9/1 = 0.9, therefore, in the FlexCurve, the corresponding Reset time entry is at 0.9 x PKP. 6–84 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 353: Phase Undervoltage Protection (27P)
VOLTAGE ELEMENTS Phase Undervoltage Protection (27P) The 850 relay is equipped with the Phase Undervoltage (UV) element. The Phase Undervoltage element may be used to protect voltage sensitive loads and system components against sustained undervoltage conditions. This element may be used for permissive functions, initiation of the source transfer schemes, and similar functions.
Page 354 Undervoltage Curves. BLOCK Range: Off, Any FlexLogic operand Default: Off OUTPUT RELAY X For details see Common Setpoints. EVENTS Range: Enabled, Disabled Default: Enabled TARGETS Range: Disabled, Self-reset, Latched Default: Self-reset 6–86 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 355 CHAPTER 6: PROTECTION SETPOINTS VOLTAGE ELEMENTS Figure 6-35: Phase Undervoltage Protection logic diagram 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 6–87...
Page 356: Timed Undervoltage Protection (27T)
VOLTAGE ELEMENTS CHAPTER 6: PROTECTION SETPOINTS Timed Undervoltage Protection (27T) The 850 relay provides one Timed Phase Undervoltage (UV) protection element per protection group. This element may be used for protection against transient voltage drops and low voltage ride through applications.
Page 357 This setting can be coordinated with recloser shot settings. This setting is only functional if the Counter Mode setting is set to Enabled. FASTPATH: 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 6–89...
Page 358 The selection of the Disabled setting disables the targets of Timed UV function. In self- reset mode, the targets remain active until function drops out. In latched mode, the target maintains the set state until deactivated by a reset command. 6–90 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 359 CHAPTER 6: PROTECTION SETPOINTS VOLTAGE ELEMENTS Figure 6-36: Timed Undervoltage Protection logic diagram 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 6–91...
Page 360 Curve Settings: As shown in the red characteristic curve Pickup: 0.90 x VT Dropout: 105.5 % of PKP (0.95 x VT) Voltage Drops: Figure 6-38: System behaviour from Case 1 6–92 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 361 The sample settings and the expected behavior are shown below here. Curve Settings: As shown in the red characteristic curve Pickup: 0.90 x VT Dropout: 105.5 % of PKP (0.95 x VT) Voltage Drops: 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 6–93...
Page 362 In such low voltage conditions, the protection devices are required to not trip, and the energy resource can continue to support the grid under transient low voltages. To meet these requirements, the configurable curve points can be used to create the 6–94 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 363 In this case, the lower timed operating point will be put ahead of the higher operating time and the lower timed operating point is used for operation. 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 6–95...
Page 364 Time Limit Original Points New Points 1500 7,8,9,10 2000 In this case, the points are not sorted. Upon saving the settings, the points will get sorted by time to generate the curve. 6–96 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 365: Uv Reactive Power (27Q)
To the extent that the DER is disconnected from the grid at the network connection point, the individual generating units are shut down, too. Consequently, re-closing of the CB at the network connection point does not require any mains voltage measurement. Re- closing is done manually. 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 6–97...
Page 366 Setpoint Voltage Mode is only applicable when Phase VT Connection (under System > FASTPATH: Voltage Sensing > Ph VT Bnk1-J2) selection is Wye. This setting is hidden when the Phase VT Connection selection is Delta. 6–98 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 367 8 Series devices. PICKUP DELAY Range: 0.000 to 600.000 s in steps of 0.001 Default: 0.500 s This setting provides a definite time dropout delay for the trip function. 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 6–99...
Page 368 Range: Off, On Default: Off When set to ‘ON’ this setting allows the initiation of the generating unit CB re-closing from the UV Reactive Power protection function by using the operand ‘UV Var OP’. 6–100 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 369 The re-closing can be blocked, when the selected operand is asserted. EVENTS Range: Disabled, Enabled Default: Enabled The selection of the Enabled setting enables the events of the function. TARGETS Range: Disabled, Self-Reset, Latched Default: Self-Reset 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 6–101...
Page 370 VOLTAGE ELEMENTS CHAPTER 6: PROTECTION SETPOINTS Figure 6-45: Logic Diagram of UV Reactive Power Protective Function (1 of 2) 6–102 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 371 CHAPTER 6: PROTECTION SETPOINTS VOLTAGE ELEMENTS Figure 6-46: Logic Diagram of UV Reactive Power Protection Function (2 of 2) 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 6–103...
Page 372: Auxiliary Undervoltage (27X)
CHAPTER 6: PROTECTION SETPOINTS Auxiliary Undervoltage (27X) The 850 relay provides two identical Auxiliary Undervoltage (UV) elements per protection group, or a total of 12 elements. Each Auxiliary Undervoltage element may be used to protect voltage sensitive loads and system components against sustained undervoltage conditions.
Page 373 SETPOINTS Vx > MINIMUM SIGNAL INPUT: SETPOINTS OUTPUT RELAYS 3 to 7 NAME( Ax VT Bnk1-J2 Do Not Operate, Operate 889 only Auxiliary voltage (Vaux) LED: PICKUP 894047A3.cdr Aux UV 1(2) PKP: 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 6–105...
Page 374: Phase Overvoltage Protection (59P)
CHAPTER 6: PROTECTION SETPOINTS Phase Overvoltage Protection (59P) The 850 relay provides two identical Phase Overvoltage (OV) elements per protection group, or a total of 12 elements. Each Phase Overvoltage element may be used to protect voltage sensitive loads and system components against sustained overvoltage conditions.
Page 375 Default: 1.000 s BLOCK Range: Off, Any FlexLogic operand Default: Off OUTPUT RELAY X For details see Common Setpoints. EVENTS Range: Enabled, Disabled Default: Enabled TARGETS Range: Disabled, Self-reset, Latched Default: Self-reset 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 6–107...
Page 376 VOLTAGE ELEMENTS CHAPTER 6: PROTECTION SETPOINTS Figure 6-48: Phase Overvoltage logic diagram 6–108 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 377: Auxiliary Overvoltage Protection (59X)
VOLTAGE ELEMENTS Auxiliary Overvoltage Protection (59X) The 850 relay provides one Auxiliary Overvoltage (OV) element per protection group, or a total of 6 elements. Each Auxiliary OV element is used to protect voltage sensitive loads and system components against sustained overvoltage conditions. This element can be used for monitoring zero-sequence voltage (from an "open corner delta"...
Page 378 Default: 1.000 s BLOCK Range: Off, Any FlexLogic operand Default: Off OUTPUT RELAY X For details see Common Setpoints. EVENTS Range: Enabled, Disabled Default: Enabled TARGETS Range: Disabled, Self-reset, Latched Default: Self-reset 6–110 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 379 CHAPTER 6: PROTECTION SETPOINTS VOLTAGE ELEMENTS Figure 6-50: Auxiliary Overvoltage Protection logic diagram 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 6–111...
Page 380: Neutral Overvoltage Protection (59N)
VOLTAGE ELEMENTS CHAPTER 6: PROTECTION SETPOINTS Neutral Overvoltage Protection (59N) The 850 relay provides one Neutral Overvoltage (also called Neutral Displacement) (Neutral OV) element per protection group. The Neutral Overvoltage element can be used to detect asymmetrical system voltage conditions caused by a ground fault or the loss of one or two phases of the source. The element responds to the system neutral voltage (3V_0), calculated from the phase voltages.
Page 381 Default: 1.000 s BLOCK Range: Off, Any FlexLogic operand Default: Off OUTPUT RELAY X For details see Common Setpoints. EVENTS Range: Enabled, Disabled Default: Enabled TARGETS Range: Disabled, Self-reset, Latched Default: Self-reset 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 6–113...
Page 382 VOLTAGE ELEMENTS CHAPTER 6: PROTECTION SETPOINTS Figure 6-51: Neutral Overvoltage Protection logic diagram 6–114 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 383: Negative Sequence Overvoltage Protection (59_2)
VOLTAGE ELEMENTS Negative Sequence Overvoltage Protection (59_2) The 850 relay provides one Negative Sequence Overvoltage (Negative Sequence OV 1) element per protection group, or a total of 6 elements. The Negative Sequence Overvoltage element can be used to detect an asymmetrical system voltage condition, loss of one or two phases of the source, or reversed phase sequence of voltages.
Page 384 VOLTAGE ELEMENTS CHAPTER 6: PROTECTION SETPOINTS TARGETS Range: Disabled, Self-reset, Latched Default: Self-reset 6–116 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 385 CHAPTER 6: PROTECTION SETPOINTS VOLTAGE ELEMENTS Figure 6-52: Negative Sequence Overvoltage Protection logic diagram 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 6–117...
Page 386: Admittance
Setpoints > System > Voltage Sensing set to “Wye.” Selection of K2 V0, K2 Vaux, is only available with the Slot K Bank order code. Otherwise, the neutral admittance is calculated from Slot J options only. 6–118 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 387 Mode and Direction per the tripping and operating ranges of the Neutral Admittance Ground Fault protection. This is setting is not applicable to protection criterion mode Y0. FASTPATH: 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 6–119...
Page 388 Secondly, this angle can also be used to eliminate the angular errors of the voltage transformer and/or current transformers (CT); measured phase angle deviations caused by measuring inaccuracy of voltage transformers, can be eliminated by properly setting this value. Y0" 6–120 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 389 Neutral Admittance Ground Fault protection will operate after the set Pickup Delay time when the neutral conductance quantity, G0, exceeds the reach level defined by this setting. This setting is not applicable when the Direction setting is set to Reverse. 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 6–121...
Page 390 Neutral Admittance Ground Fault protection will operate after the set Pickup Delay time when the neutral susceptance quantity, B0, exceeds this setting. This setting is not applicable when the Direction setpoint is set as Reverse. 6–122 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 391 This setting specifies the minimum limit of the measuring process ground voltage to activate Neutral Admittance Ground Fault protection. The element remains blocked until the ground voltage value for building the protective criterion exceeds this minimum limit. 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 6–123...
Page 392 OUTPUT RELAY X For details see Common Setpoints. EVENTS Range: Enabled, Disabled Default: Enabled The element will be blocked, when the selected operand is asserted. TARGETS Range: Self-reset, Latched, Disabled Default: Self-reset 6–124 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 393 CHAPTER 6: PROTECTION SETPOINTS ADMITTANCE Figure 6-53: Neutral Admittance Ground Protection logic diagram 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 6–125...
Page 394: Power Elements
POWER ELEMENTS CHAPTER 6: PROTECTION SETPOINTS Power Elements Figure 6-54: Power Elements Display Hierarchy 6–126 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 395: Directional Power (32)
CHAPTER 6: PROTECTION SETPOINTS POWER ELEMENTS Directional Power (32) The 850 relay provides two identical Directional Power elements per protection group; a total of 12 elements. The Directional Power element responds to three-phase directional power and is designed for reverse power (32REV) and low forward power (32FWD) applications for synchronous machines or interconnections involving co-generation.
Page 396 POWER ELEMENTS CHAPTER 6: PROTECTION SETPOINTS Figure 6-56: Sample applications of the Directional Power element 6–128 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 397 The setting specifies the minimum power as defined along the relay characteristic angle (RCA) for the stage 1 of the element. The positive values imply a shift towards the operate region along the RCA line; the negative values imply a shift towards the restrain 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 6–129...
Page 398 2 for tripping. BLOCK Range: Off, Any FlexLogic operand Default: Off OUTPUT RELAY X For details see Common Setpoints. EVENTS Range: Enabled, Disabled Default: Enabled TARGETS Range: Self-reset, Latched, Disabled Default: Self-reset 6–130 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 399 CHAPTER 6: PROTECTION SETPOINTS POWER ELEMENTS Figure 6-57: Directional Power logic diagram 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 6–131...
Page 400: Wattmetric Ground Fault (32N)
1 x VT is the nominal phase-to-ground voltage per the VT bank settings. CT INPUT Range: dependant upon the order code Default: CT Bank 1 -J1 This setting provides selection for the current bank input. 6–132 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 401 * indicates complex conjugate. By varying the element characteristic angle (ECA), the element can be made to respond to forward or reverse direction in inductive, resistive, or capacitive networks as shown in the Wattmetric characteristic angle response diagram. 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 6–133...
Page 402 The definite time timer specified by this setting, is used, and when it expires it releases the inverse time timer for operation (torque control). 6–134 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 403 Default: 1.00 s BLOCK Range: Off, Any FlexLogic operand Default: Off OUTPUT RELAY X For details see Common Setpoints. EVENTS Range: Enabled, Disabled Default: Enabled TARGETS Range: Self-reset, Latched, Disabled Default: Self-reset 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 6–135...
Page 404 POWER ELEMENTS CHAPTER 6: PROTECTION SETPOINTS Figure 6-59: Wattmetric Ground Fault logic diagram 6–136 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 405: Frequency Elements
Power Outputs Group 3 Frequency Rate of Change Frequency Protection Group 4 Fast Underfrequency Monitoring Group 5 Control Group 6 FlexLogic Testing Level 1 Level 2 Level 3 Level 4 Level 5 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 6–137...
Page 406: Underfrequency (81U)
CHAPTER 6: PROTECTION SETPOINTS Underfrequency (81U) The 850 can be used as the primary detecting relay in automatic load-shedding schemes based on underfrequency. The need for such a relay arises if during a system disturbance, an area becomes electrically isolated from the main system and suffers a generation deficiency due to the loss of either transmission or generation facilities.
Page 407 A setting of zero is suspend current supervision. BLOCK Range: Off, Any FlexLogic operand Default: Off OUTPUT RELAY X For details see Common Setpoints. EVENTS Range: Enabled, Disabled Default: Enabled TARGETS Range: Disabled, Self-reset, Latched Default: Self-reset 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 6–139...
Page 408 FREQUENCY ELEMENTS CHAPTER 6: PROTECTION SETPOINTS Figure 6-61: Underfrequency Protection logic diagram 6–140 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 409: Overfrequency (81O)
CHAPTER 6: PROTECTION SETPOINTS FREQUENCY ELEMENTS Overfrequency (81O) The 850 relay providesfour identical Overfrequency (OVERFREQ) elements per protection group, or a total of 24 elements. A significant overfrequency condition, likely caused by a breaker opening and disconnecting load from a particular generation location, can be detected and used to quickly ramp the turbine speed back to normal.
Page 410 BLOCK Range: Off, Any FlexLogic operand Default: Off OUTPUT RELAY X For details see Common Setpoints. EVENTS Range: Enabled, Disabled Default: Enabled TARGETS Range: Disabled, Self-reset, Latched Default: Self-reset 6–142 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 411 CHAPTER 6: PROTECTION SETPOINTS FREQUENCY ELEMENTS Figure 6-62: Overfrequency Protection logic diagram 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 6–143...
Page 412: Frequency Rate Of Change (81R)
Configurable setting is selected and the element operates TREND Range: Decreasing, Increasing, Bi-directional Default: Decreasing The setting allows configuring of the element to respond to increasing or decreasing frequency, or to a frequency change in either direction. 6–144 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 413 In such condition, the true supervision level is internally changed to 1/sqrt(3) of the user setting since the base of VT here is the phase-phase voltage. 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 6–145...
Page 414 When set to “Latched,” the target message will remain visible after the element output returns to logic 0 until a RESET command is received by the relay. 6–146 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 415 CHAPTER 6: PROTECTION SETPOINTS FREQUENCY ELEMENTS Figure 6-63: Frequency Rate-of-Change Protection logic diagram 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 6–147...
Page 416: Fast Underfrequency
In such condition, the true supervision level is internally changed to 1/sqrt(3) of the user setting since the base of VT here is the phase-phase voltage. 6–148 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 417 Range: 0.000 to 6000.000 s in steps of 0.001 s Default: 1.000 s RESET DELAY Range: 0.000 to 6000.000 s in steps of 0.001 s Default: 0.000 s BLOCK Range: Off, Any FlexLogic operand Default: Off 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 6–149...
Page 418 FREQUENCY ELEMENTS CHAPTER 6: PROTECTION SETPOINTS OUTPUT RELAY X For details see Common Setpoints. EVENTS Range: Enabled, Disabled Default: Enabled TARGETS Range: Self-reset, Latched, Disabled Default: Self-reset 6–150 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 419 CHAPTER 6: PROTECTION SETPOINTS FREQUENCY ELEMENTS Figure 6-64: Fast Underfrequency logic diagram 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 6–151...
Page 420 FREQUENCY ELEMENTS CHAPTER 6: PROTECTION SETPOINTS 6–152 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 421: Monitoring
Data Capture Real Power FlexLogic Pulsed Outputs RTD Temperature Testing Reactive Power Data Capture RTD Trouble Digital Counters Loss of Comms Apparent Power Level 1 Level 2 Level 3 Level 4 Level 5 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 7–1...
Page 422: Trip And Close Circuit Monitoring
CHAPTER 7: MONITORING Trip and Close Circuit Monitoring The 850 relay provides Trip and Close Circuit Monitoring elements. The first and second Form A relay outputs on slot “F” include a circuit to monitor the DC voltage across the output contact when it is open. To do that, an external jumper is wired between the terminals “FA_1 COM”...
Page 423 FA_2 FA_2 OPT/V contact Close Coil DC - Figure 7-4: Trip Coil Circuit with Monitoring DC + Output Relay 1 (TRIP) FA_1 External FA_1 Jumper FA_1 OPT/V contact Trip Coil DC - 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 7–3...
Page 424 52a in the trip circuit (across 52b contact(s) for Close coil). With such connections, the trickle current is maintained by the resistor. For these applications the setting for the Bypass Breaker Status should be set to ENABLED. 7–4 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 425 Table 7-1: Value of Resistor “R” Power Supply (V DC) Resistance (Ohms) Power (Watts) 1000 10000 25000 25000 50000 Trip and Close Contacts must be considered unsafe to touch when the relay is DANGER: energized. 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 7–5...
Page 426 (not closed) open. BLOCK Range: Off, Any FlexLogic operand Default: Off OUTPUT RELAY X For details see Common Setpoints. EVENTS Range: Disabled, Enabled Default: Enabled TARGETS Default: Self-reset Range: Disabled, Self-reset, Latched 7–6 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 427 CHAPTER 7: MONITORING TRIP AND CLOSE CIRCUIT MONITORING Figure 7-7: Trip Circuit Monitoring Diagram 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 7–7...
Page 428 (not open) closed. BLOCK Default: Off Range: Off, Any FlexLogic operand OUTPUT RELAY X For details see Common Setpoints. EVENTS Range: Disabled, Enabled Default: Enabled TARGETS Range: Disabled, Self-reset, Latched Default: Self-reset 7–8 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 429 CHAPTER 7: MONITORING TRIP AND CLOSE CIRCUIT MONITORING Figure 7-8: Close Circuit Monitoring Diagram 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 7–9...
Page 430: Breaker Arcing Current
CHAPTER 7: MONITORING Breaker Arcing Current The 850 relay provides one Breaker Arcing Current element.This element calculates an estimate of the per-phase wear on the breaker contacts by measuring and integrating the current squared passing through the breaker contacts as an arc. These per-phase values are added to accumulated totals for each phase and compared to a programmed threshold value.
Page 431 The setpoint specifies the threshold value (kA2-cycle) above which the output operand is set. BLOCK Range: Off, Any FlexLogic operand Default: Off OUTPUT RELAYS X For details see Common Setpoints. EVENTS Range: Enabled, Disabled Default: Enabled TARGETS Range: Self-reset, Latched, Disabled Default: Self-reset 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 7–11...
Page 432 BREAKER ARCING CURRENT CHAPTER 7: MONITORING Figure 7-10: Breaker Arcing Current logic diagram 7–12 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 433: Breaker Health
BREAKER HEALTH Breaker Health The 850 relay provides breaker health information by monitoring and analyzing the operation count, arcing energy of breaking current, arcing time, tripping time, closing time and spring charging time if applicable. The breaker health status depends on many factors, such as permissible operation number, magnitude of breaking current, mechanical wear and contact wear.
Page 434 Default: 0.300 s The setting declares an Arc time failure condition if there are currents flowing through the breaker after this time delay. This setting should be greater than the Arc time PKP value. 7–14 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 435 LED is lit and one operand is asserted. BLOCK Range: Off, Any FlexLogic operand Default: Off OUTPUT RELAY X For details see Common Setpoints. EVENTS Range: Enabled, Disabled Default: Enabled TARGETS Range: Disabled, Self-reset, Latched Default: Self-reset 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 7–15...
Page 436 BREAKER HEALTH CHAPTER 7: MONITORING Figure 7-11: Breaker Health and Operation logic diagram 7–16 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 437: Functions
For wye-connected VTs, the power factor value is calculated from the valid phase(s) with a voltage that is above a user-selected threshold and a current that is above 0.002 x CT. Power Factor element delay timers are only allowed to time when the supervision 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 7–17...
Page 438 If the element is continuously asserted with the new power factor value, the timer will continue timing, otherwise, the element will reset without operating. The following figure illustrates the conventions established for use in 850 relays, where the negative value means the lead power factor, and the positive value means the lag power factor.
Page 439 CHAPTER 7: MONITORING FUNCTIONS 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 7–19...
Page 440 Power Factor Operate flag in the Switch-Out level is asserted if the element stays switched out for the time defined by the time delay. The minimum operating voltage is set as a threshold below which the element is reset. 7–20 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 441 SIGNAL INPUT Range: Power 1, Power 2 Default: Power 1 This setting provides the selection for the power input. (850-D only) SWITCH-IN Range: -0.01 to -0.99, 1, 0.99 to 0.01 (for 8 Series Enervista Setup software: 0.01 Lead, 0.02 Lead, …, 0.98 Lead, 0.99 Lead, 1, 0.99 Lag, 0.98 Lag, …, 0.02 Lag, 0.01 Lag) Default: 0.08 Lag...
Page 442 FUNCTIONS CHAPTER 7: MONITORING Figure 7-14: Power Factor logic diagram 7–22 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 443: Demand
Demand time interval, in the same way as Block Interval. The value is updated every minute and indicates the Demand over the time interval just proceeding the time of update. 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 7–23...
Page 444: Current Demand
This setpoint sets the Current Demand Pickup level. BLOCK Range: Off, Any FlexLogic operand Default: Off OUTPUT RELAY X For details see Common Setpoints. EVENTS Range: Enabled, Disabled Default: Enabled TARGETS Range: Disabled, Self-reset, Latched Default: Self-reset 7–24 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 445 CHAPTER 7: MONITORING FUNCTIONS Figure 7-16: Current Demand logic diagram 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 7–25...
Page 446: Real Power Demand
Pickup comparison. BLOCK Range: Off, Any FlexLogic operand Default: Off OUTPUT RELAYS X For details see Common Setpoints. EVENTS Range: Enabled, Disabled Default: Enabled TARGETS Range: Disabled, Self-reset, Latched Default: Self-reset 7–26 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 447 CHAPTER 7: MONITORING FUNCTIONS Figure 7-17: Real Power Demand logic diagram 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 7–27...
Page 448: Reactive Power
Pickup comparison. BLOCK Range: Off, Any FlexLogic operand Default: Off OUTPUT RELAY X For details see Common Setpoints. EVENTS Range: Enabled, Disabled Default: Enabled TARGETS Range: Disabled, Self-reset, Latched Default: Self-reset 7–28 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 449 CHAPTER 7: MONITORING FUNCTIONS Figure 7-18: Reactive Power Demand logic diagram 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 7–29...
Page 450: Apparent Power Demand
The setting sets the Apparent Power Demand Pickup level. BLOCK Range: Off, Any FlexLogic operand Default: Off OUTPUT RELAY X For details see Common Setpoints. EVENTS Range: Enabled, Disabled Default: Enabled TARGETS Range: Disabled, Self-reset, Latched Default: Self-reset 7–30 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 451 CHAPTER 7: MONITORING FUNCTIONS Figure 7-19: Apparent Power Demand logic diagram 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 7–31...
Page 452: Pulsed Outputs
This feature is programmed such that no more than one pulse per two seconds is required. The 850 is not a revenue class meter and cannot be used for billing purposes. Energy quantities are displayed in MWh and MVarh, with resolutions of 1 kWh and 1 kVarh respectively.
Page 453 The setpoint specifies the positive VARhours threshold pulse increment after which the output pulse and output operand are set. NEG VARHS PULSE RELAY X For details see Common Setpoints. EVENTS Range: Disabled, Enabled Default: Enabled TARGETS Range: Disabled, Self-reset, Latched Default: Self-Reset 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 7–33...
Page 454 FUNCTIONS CHAPTER 7: MONITORING Figure 7-20: Pulsed Outputs logic diagram 7–34 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 455: Digital Counters
FUNCTIONS Digital Counters The 850 relay provides sixteen identical Digital Counters. A Digital Counter counts the number of state transitions from logic 0 to logic 1. The Digital Counters are numbered from 1 to 16. The counters are used to count operations such as the Pickups of an element, the changes of state of an external contact (e.g.
Page 456 The counter accumulated value can be reset to zero either by asserting an operand NOTE: programmed under Reset from the counter menu, executing the clear Digital Counters command under the Records/Clear menu, or by setting the function of the counter to NOTE “Disabled”. 7–36 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 457 CHAPTER 7: MONITORING FUNCTIONS Figure 7-21: Digital Counter logic diagram 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 7–37...
Page 458: Harmonic Detection
This setting defines the phases required for operation, and the detail is explained below: – ANY ONE: At least one phase picked up. – ANY TWO: Two or more phases picked up. – ANY THREE: All three phases picked up. 7–38 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 459 A similar adaptive average algorithm is applied to calculate the average of operation current magnitude. OUTPUT RELAY X For details see Common Setpoints. EVENTS Range: Disabled, Enabled Default: Enabled TARGETS Range: Self-reset, Latched, Disabled Default: Self-reset 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 7–39...
Page 460 HARMONIC DETECTION CHAPTER 7: MONITORING Figure 7-22: Harmonic Detection logic diagram 7–40 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 461: Transient Ground Fault Detection
However, the relays on other feeders detect the fault in the reverse direction. In the Peterson coil figure, the colors represent the following: • Red: inductive (Peterson coil) current • Purple: Capacitive (faulty feeder) current • Green: Capacitive (healthy feeder) current 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 7–41...
Page 462 Figure 7-24: Power characteristics The Power characteristics figure shows Active Power (P) and Reactive Power (Q). The small P/Q area is represented by the small green rectangles from (2, 5) to (-2, -5). 7–42 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 463 VT tolerance is 2%-5% and this range needs to be avoided. BLOCK Range: Off, Any FlexLogic operand Default: Off OUTPUT RELAY X For details see Common Setpoints. EVENTS Range: Disabled, Enabled Default: Enabled TARGETS Range: Self-reset, Latched, Disabled Default: Self-reset 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 7–43...
Page 464 TRANSIENT GROUND FAULT DETECTION CHAPTER 7: MONITORING Figure 7-25: Transient Ground Fault Detection logic diagram 7–44 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 465: Rtd Temperature
These channels are intended to be connected to any of the RTD types in common use. Depending on the order code: L option on slot G, the 850 relay is packaged with one LVIO card consisting of one RTD input, four DCmA inputs and seven DCmA outputs. Additionally, the relay can be furnished with up to two optional RTD cards, each of them having 6 RTD input channels.
Page 466 RTD Protection NOTE The 850 relay can monitor up to 13 RTDs and 12 RRTDs, each of which can be configured to have a trip temperature and an alarm temperature. The RTD Temperature protection menu will be seen on the relay upon availability of RTD input/inputs. The RRTD Temperature protection setpoints can be seen only if the 850 has the RMIO module installed and validated.
Page 467 Range: 1°C to 250°C in steps of 1°C (33°F to 482°F in steps of 2°F) Default: 130°C (266°F) ALARM PICKUP DELAY Range: 0 s to 600 s in steps of 1 s Default: 2 s 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 7–47...
Page 468 Default: 0 s ALARM OUTPUT RELAY X For details see Common Setpoints. BLOCK Range: Off, Any FlexLogic operand Default: Off EVENTS Range: Disabled, Enabled Default: Enabled TARGETS Range: Disabled, Self-reset, Latched Default: Latched 7–48 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 469 CHAPTER 7: MONITORING RTD TEMPERATURE Figure 7-27: RTD Protection logic diagram 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 7–49...
Page 470: Rtd Trouble
Range: Disabled, Alarm, Latched Alarm Default: Disabled ALARM OUTPUT RELAY X For details see Common Setpoints. EVENTS Range: Disabled, Enabled Default: Enabled TARGETS Range: Disabled, Self-reset, Latched Default: Latched Figure 7-28: RTD Trouble logic diagram 7–50 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 471: Loss Of Communications
Default: 2 s OUTPUT RELAY X For details see Common Setpoints. BLOCK Range: Off, Any FlexLogic operand Default: Off EVENTS Range: Disabled, Enabled Default: Enabled TARGETS Range: Disabled, Self-reset, Latched Default: Latched 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 7–51...
Page 472 LOSS OF COMMUNICATIONS CHAPTER 7: MONITORING Figure 7-29: Loss of Communications logic diagram 7–52 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 473 Underfrequency Restoration Bus Transfer AR Shot 1 to 4 Autoreclose AR Rate Supervision CT Supervision AR Current Supervision VT Fuse Failure AR Zone Coordination Level 1 Level 2 Level 3 Level 4 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 8–1...
Page 474 CHAPTER 8: CONTROL Setpoint Group The 850 relay provides six setpoint groups. All setpoints contained under the protection setpoints are reproduced in six groups, identified as Setpoint Groups 1, 2, 3, 4, 5 and 6. These multiple setpoints provide the capability for both automatic and manual switching to protection settings for different operating situations.
Page 475: Control Setpoint Group
CHAPTER 8: CONTROL SETPOINT GROUP Figure 8-2: Setpoint Groups logic diagram 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 8–3...
Page 476: Local Control Mode (Breakers And Switches)
“Local Mode” input de-asserted), or LOCAL MODE (Local Mode setpoint asserted). Breaker Mode defaults The default value of the breaker control mode for the 850-E ordered with one breaker is Remote (Local Mode set to Off or the selected LOCAL MODE input de-asserted). In this mode, all programmed setpoints from the respective menus for Breaker Control and Switch Control (see the respective logic) are active.
Page 477 PB must be pressed again to enable the selection. The local mode breaker selection and operation is only active if the user has proper level security access. The default value for “Select Before Operate” setpoint is set to “Disabled” for 850-E. For NOTE: 850-D relay ordered with one breaker this value is set to “Enabled”.
Page 478 PB “Block” will block the closing command, and vice versa (see figures: Local Control for breakers/Local Control for switches). When the block is active, the letter “B” appears in the SLD next to the controlled component 8–6 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 479 “Bypass” will allow closing command. If the bypass is active for the selected breaker or switch, a letter “By” appears next to the symbol in the SLD. Figure 8-5: SLD Pushbutton “Bypass Block” logic diagram 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 8–7...
Page 480 The Local Mode control allows programming of separate pair of PBs for Open and Close FASTPATH: commands to breakers and for Open and Close commands to switches. If desired, one pair of pushbuttons can be programmed for Open and Close commands to both breakers and switches. 8–8 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 481 CHAPTER 8: CONTROL LOCAL CONTROL MODE (BREAKERS AND SWITCHES) Figure 8-7: Local Control for breakers 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 8–9...
Page 482 LOCAL CONTROL MODE (BREAKERS AND SWITCHES) CHAPTER 8: CONTROL Figure 8-8: Local Control for Switches 8–10 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 483 SELECT BEFORE OPERATE Range: Disabled, Enabled Default: Disabled, or Enabled for 850-D without phase current inputs. This setpoint is included in the Local Control Mode menu only if the 8 Series relay supports one breaker. This setpoint is omitted for relays supporting more than one breaker.
Page 484 The tagging cannot be bypassed and can only be disabled (untagged) by pressing the TAG key again. EVENTS Range: Disabled, Enabled Default: Enabled TARGETS Range: Disabled, Self-reset, Latched Default: Self-reset 8–12 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 485: Breaker Control (2)
Local Control Mode menu is set to Disabled. The breaker remote open and close commands are operational. The 850 relay provides control of up to two breakers, depending on the order code. 850-D FASTPATH: and 850-E single feeders provides control of one breaker, while 850-D dual feeders and 850-P provide control of two breakers.
Page 486 DEAD SOURCE PERM setpoint from the Synchrocheck menu shall not be disabled. EVENTS Range: Disabled, Enabled Default: Enabled TARGETS Range: Disabled, Self-reset, Latched Default: Self-reset 8–14 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 487 CHAPTER 8: CONTROL BREAKER CONTROL (2) Figure 8-9: Breaker Control logic diagram 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 8–15...
Page 488: Switch Control (9)
Range: 0.000 to 6000.000 s in steps of 0.001 s Default: 0.000 s This setting specifies the seal-in time of the open commands due to an operator initiated manual or remote open command to the disconnect switch. 8–16 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 489 This setting specifies the selection of an input which when asserted bypasses the block to the disconnect close control. The Close command is permitted. EVENTS Range: Disabled, Enabled Default: Enabled TARGETS Range: Disabled, Self-reset, Latched Default: Self-reset 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 8–17...
Page 490 SWITCH CONTROL (9) CHAPTER 8: CONTROL Figure 8-10: Switch Control logic diagram 8–18 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 491: Pole Discordance (52)
The pole discordance scheme in the 850-D relay allows two types of breaker contact wiring: Figure 8-11:Detecting Pole Discordance externally shows wiring of the breaker pole discordance signal detected externally.
Page 492 Even though the minimum Pickup Delay of 100 ms from the range serves most breakers FASTPATH: with shorter operating times, make sure to check the breaker operating times, and set the delay to be longer than these times. 8–20 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 493 Block the Pole Discordance element during single-pole breaker reclosing, as the status of FASTPATH: the three breaker poles creates conditions for pole discordance operation. OUTPUT RELAY X For details see Common Setpoints. 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 8–21...
Page 494 Reset mode, the targets remain active until the function drops out. In Latched mode, the target maintains the set state until deactivated by a reset command. Figure 8-13: Pole Discordance detection - main logic (A) 8–22 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 495 CHAPTER 8: CONTROL POLE DISCORDANCE (52) Figure 8-14: Contact based Pole Discordance detection logic (B) 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 8–23...
Page 496 POLE DISCORDANCE (52) CHAPTER 8: CONTROL Figure 8-15: Current based Pole Discordance detection logic (C) 8–24 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 497: Virtual Input Control
Virtual Input is also “On” until the “Off” command is received. If the Virtual Input type is “Self-Reset,” the command and status of this Virtual Input reverts to “Off” after one evaluation of the FlexLogic™ equations. 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 8–25...
Page 498: Trip Bus
CHAPTER 8: CONTROL Trip Bus The 850 relay provides six identical Trip Bus elements. The Trip Bus element allows aggregating outputs of protection, control elements, inputs without using FlexLogic and assigning them in a simple and effective manner. Each Trip Bus can be assigned to trip, alarm or the other logic actions.
Page 499 CHAPTER 8: CONTROL TRIP BUS Figure 8-17: Trip Bus logic diagram 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 8–27...
Page 500: Breaker Failure (50Bf)
Pickup value. The overcurrent detectors are required to operate after the Breaker Failure delay interval to eliminate the need for very fast resetting overcurrent detectors. 8–28 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 501: Setup
BREAKER CLOSED Range: Off, Any FlexLogic operand Default: Off The setpoint selects the FlexLogic operand (auxiliary switch contact) to indicate that the circuit breaker is closed. 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 8–29...
Page 502 In a microprocessor relay this time is not significant. In the 850 relay, the current magnitude ramps-down to zero in ¾ of a power cycle after the current is interrupted.
Page 503 BLOCK Range: Off, Any FlexLogic operand Default: Off OUTPUT RELAY X For details see Common Setpoints. EVENTS Range: Disabled, Enabled Default: Enabled TARGETS Range: Disabled, Self-reset, Latched Default: Self-reset 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 8–31...
Page 504: Initiate
Ntrl IOC 1 OP Ntrl IOC 2 OP GND TOC 1 OP GND IOC 1 OP For 850-P with 4 CT banks, the default setting for IN9 and IN10 is Off. NOTE: NOTE 8–32 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 505 CHAPTER 8: CONTROL BREAKER FAILURE (50BF) Figure 8-18: Breaker Failure logic diagram 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 8–33...
Page 506: Arc Flash Protection
J1-Bank (4-0B in the order code). NOTE LIGHT SENSOR 1(4) Range: Disabled, Enabled Default: Disabled BLOCK Range: Off, Any FlexLogic operand Default: Off OUTPUT RELAY X For details see Common Setpoints. 8–34 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 507 ARC FLASH PROTECTION EVENTS Range: Disabled, Enabled Default: Enabled This setting enables or disables the events of the Arc Flash function. TARGETS Range: Self-reset, Latched, Disabled Default: Latched Figure 8-19: Arc Flash logic diagram 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 8–35...
Page 508: Synchrocheck (25)
CHAPTER 8: CONTROL Synchrocheck (25) The 850 relay provides one Synchrocheck element. The synchronism check function is intended for supervising the paralleling of two parts of a system which are to be joined by the closure of a circuit breaker. The Synchrocheck elements are typically used at locations where the two parts of the system are interconnected.
Page 509 The setpoint selects the maximum angular difference in degrees between the two sources. An angular difference between the two input voltage phasors below this value is within the permissible limit for synchronism. 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 8–37...
Page 510 Range: 0.00 to 1.50 x VT in steps of 0.01 x VT Default: 0.80 x VT The setpoint establishes a minimum voltage magnitude for the Line Voltage. Above this magnitude, the Line Voltage input used for Synchrocheck is considered “Live” or energized. 8–38 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 511 Synchrocheck can be also blocked when the relay is tripping. OUTPUT RELAY X For details see Common Setpoints. EVENTS Range: Enabled, Disabled Default: Enabled TARGETS Range: Disabled, Self-reset, Latched Default: Self-reset 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 8–39...
Page 512 SYNCHROCHECK (25) CHAPTER 8: CONTROL Figure 8-20: Synchrocheck logic diagram 8–40 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 513: Manual Close Blocking
Manual Close Blocking The 850 relay provides one Manual Close Blocking (MCB) element. The 850 can be programmed to block instantaneous overcurrent elements, to raise the Pickup level of time overcurrent elements, or to change the setpoint group, when a manual circuit breaker close is initiated.
Page 514 The setpoint determines the setpoint group that is used after the Manual Close Blocking condition is detected. OUTPUT RELAY X For details see Common Setpoints. EVENTS Range: Enabled, Disabled Default: Enabled TARGETS Range: Disabled, Self-reset, Latched Default: Self-reset 8–42 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 515 CHAPTER 8: CONTROL MANUAL CLOSE BLOCKING Figure 8-21: Manual Close Blocking logic diagram 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 8–43...
Page 516: Cold Load Pickup
Cold Load Pickup The 850 relay provides one Cold Load Pickup (CLP) element. The 850 can be programmed to block instantaneous overcurrent elements, to raise the pickup level of time overcurrent elements, or change the setting group when a Cold Load Pickup condition is detected.
Page 517 Both initiating inputs can be inhibited by a blocking input. Two CLP elements, CLP1 and CLP2 are provided in 850 relays ordered to support two NOTE: breakers. In this case the selection of the CT bank under the Signal Input setpoint for CLP1...
Page 518 BLOCK Range: Off, Any FlexLogic operand Default: Off OUTPUT RELAY X For details see Common Setpoints. EVENTS Range: Disabled, Enabled Default: Enabled TARGETS Range: Disabled, Self-reset, Latched Default: Self-reset 8–46 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 519 CHAPTER 8: CONTROL COLD LOAD PICKUP Figure 8-23: Cold Load Pickup logic diagram 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 8–47...
Page 520: Undervoltage Restoration
Undervoltage Restoration The 8 Series relay provides up to two Undervoltage Restoration (UV Restore) elements. When the 850 relay is ordered to support two UV Restoration elements, the UV Restore 1 NOTE: element is always associated with Breaker 1, and UV Restore 2 element is always associated with Breaker 2.
Page 521 A Synchrocheck supervised UV Restore CLOSE command is sent directly to output #2. For FASTPATH: other outputs, logic has to be created for supervision as required. BLOCK Range: Off, Any FlexLogic operand Default: Off 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 8–49...
Page 522 Close output relay, will reset automatically after the breaker is detected closed. If the “Close” output relay is selected as Pulsed type, the output relay will stay closed, until the programmed Seal-In time expires. 8–50 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 523 CHAPTER 8: CONTROL UNDERVOLTAGE RESTORATION Figure 8-24: Undervoltage Restoration logic diagram 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 8–51...
Page 524: Underfrequency Restoration
Output relay #2 “Close” operates only when the Close function is selected, the element operates, and Synchrocheck supervision is applied. The “ALARM” LED does not turn on if the element operates when set to function Close. 8–52 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 525 If the supervision is not bypassed and UF Restore is applied for an application where the FASTPATH: breaker is located on radial feeders, or line is powered by one source only, the DEAD SOURCE PERM setpoint from the Synchrocheck menu must not be disabled. 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 8–53...
Page 526 BLOCK Range: Off, Any FlexLogic operand Default: Off OUTPUT RELAY X For details see Common Setpoints. EVENTS Range: Disabled, Enabled Default: Enabled TARGETS Range: Disabled, Self-reset, Latched Default: Self-reset 8–54 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 527 Close output relay will reset automatically after the breaker is detected closed. If the “Close” output relay is selected as Pulsed type, the output relay will stay closed, until the programmed Seal-In time expires. 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 8–55...
Page 528: Bus Transfer
The transfer scheme implemented in the 850 relay is known as Open Transfer, with an “Open-before-Close” operation sequence. This means that the faulty incomer is removed from service before the tie breaker is closed.
Page 529 CHAPTER 8: CONTROL BUS TRANSFER Figure 8-26: Transfer Scheme One-Line Diagram 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 8–57...
Page 530 When Device 43/83 is in the “Block” position, the contact connected to 850 places the corresponding input in the position for blocking the operation of the Auto Transfer Scheme. At this point in time, a system condition that might trip one of the incomers does not initiate the Transfer sequence.
Page 531 Identical logic with all 1s and 2s interchanged applies to Relay 2 for a loss of Source 2. FASTPATH: Once a condition has caused the 850-1 relay on Incomer 1 (Relay 1) to initiate a transfer, the following sequence of events will take place: •...
Page 532 INC1 CB CON & CLSD required for Incomer 2 Circuit Breaker transfer logic, Bus Tie Circuit Breaker transfer logic, and for blocking #2 close relay. For non-draw-out breakers without associated disconnect switches, this setpoint must be FASTPATH: set as ON. 8–60 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 533 Range: 0.000 to 6000.000 s in steps of 0.001 s Default: 0.000 s The setting provides the selection of a time delay to be applied to the 850 Trip output relay. The following conditions must be met to start the “Delay Select To Trip” setpoint: –...
Page 534 (Device 94). The signal triggering the Transfer sequence can be originated from the upstream protection. Typically, an auxiliary contact from the tripping device (94) is fed to one of the 850 contact inputs and set as “Source Trip”. TIMED UV ON THIS SOURCE...
Page 535 The 50N element is set to detect arcing ground faults, but allow permitted unbalances. BLOCK TRANSFER Range: Off, Any FlexLogic operand Default: Off The Transfer is blocked when the selected operand is asserted. 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 8–63...
Page 536 INC2 CB CON & CLSD required for Incomer 2 Circuit Breaker transfer logic, Bus Tie Circuit Breaker transfer logic, and for blocking #2 close relay. For non-draw-out breakers without associated disconnect switches, this setpoint must be FASTPATH: set as ON. 8–64 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 537 Range: 0.000 to 6000.000 s in steps of 0.001 s Default: 0.000 s The setting provides the selection of a time delay to be applied to the 850 trip output relay. The following conditions must be met to start the “Delay Select To Trip” setpoint.
Page 538 (Device 94). The signal triggering the Transfer sequence can be originated from the upstream protection. Typically, an auxiliary contact from the tripping device (94) is fed to one of the 850 contact inputs and set as “Source Trip”. TIMED UV ON THIS SOURCE...
Page 539 The 50N element is set to detect arcing ground faults, but allow permitted unbalances. BLOCK TRANSFER Range: Off, Any FlexLogic operand Default: Off The Transfer is blocked when the selected operand is asserted. 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 8–67...
Page 540 Range: 0.000 to 6000.000 s in steps of 0.001 s Default: 0.000 s The setting provides the selection of a time delay to be applied to the 850 trip output relay. The following conditions must be met to start the “Delay Select To Trip” setpoint.
Page 541 The #2 CLOSE OUTPUT relay is blocked if Transfer is enabled, but blocked while the breaker FASTPATH: is connected (racked-in). If breaker closing is required during maintenance, Transfer must be disabled. EVENTS Range: Disabled, Enabled Default: Enabled TARGETS Range: Disabled, Self-reset, Latched Default: Self-reset 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 8–69...
Page 542 DC source to turn on a single light bulb (“white light”). The Auxiliary Output relay from each 850 relay can also be wired to turn on an individual light bulb. The TRANSFER READY flag is high, if all of the following conditions are met: Incomer 1 Relay: •...
Page 543 CHAPTER 8: CONTROL BUS TRANSFER Figure 8-27: Transfer Scheme - Incomer Breaker 1 logic diagram 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 8–71...
Page 544 BUS TRANSFER CHAPTER 8: CONTROL Figure 8-28: Transfer Scheme - Incomer Breaker 2 logic diagram 8–72 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 545 (Bus VT) voltage is below a dead threshold value (setpoints for voltage check - dead sources associated with the Synchrocheck function must be set). 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 8–73...
Page 546 Synchrocheck (25) is required to supervise the initial closing of the incoming breakers, to provide synchronism-check supervision when paralleling the busses, or to measure the residual voltage on the bus that has lost source. 8–74 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 547: Ats Wiring Diagrams
Transfers are inhibited. A normal setting for this element is about 0.25 of Pickup of nominal voltage. When the 850 measures a single phase-phase voltage, these values should be multiplied by 1/√3 to cover the case of a phase-ground fault on a measured phase reducing that phase voltage but leaving the other two phases at a higher voltage.
Page 548 BUS TRANSFER CHAPTER 8: CONTROL Figure 8-30: 850-For Incomer (1) Wiring Diagram 8–76 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 549 CHAPTER 8: CONTROL BUS TRANSFER Figure 8-31: 850-For Incomer (2) Wiring Diagram 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 8–77...
Page 550 BUS TRANSFER CHAPTER 8: CONTROL Figure 8-32: 850-3 For Bus Tie (3) Wiring Diagram 8–78 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 551: Autoreclose
CHAPTER 8: CONTROL AUTORECLOSE Autoreclose The 850 relay provides up to two Autoreclose (AR1) elements. The Autoreclose scheme provides flexibility that allows the application of many typical distribution and subtransmission control strategies. Up to four reclosing ‘shots’ with separately programmable ‘dead times’ can be set for each shot.
Page 552 Trip occurs. If a breaker failure condition is detected at any time during operation, the scheme goes straight to Lockout. When in Lockout, the 850 disables the Reclose scheme and returns all protection setpoints to their initial values. To re-enable...
Page 553: Setup
OPEN to CLOSE. For applications where the breaker may be closed directly, without using the 850 to provide the closing signal to the breaker, this setpoint uses, for example, FlexLogic for the detection of the breaker going from the OPEN state to the CLOSED state (the breaker 850 FEEDER PROTECTION SYSTEM –...
Page 554 AUTORECLOSE CHAPTER 8: CONTROL state has to be determined by the 52a/b contact inputs wired to the 850 ) to determine if a manual CLOSE has occurred. The 850 uses the detection of a manual CLOSE to disable the Autoreclose scheme to prevent reclosing on to a fault.
Page 555 ENABLED OUTPUT RELAY 3 (X) Range: Do Not Operate, Operate Default: Do Not Operate Selects the relays required to operate while Autoreclosure is enabled. The selected relays operate while the front panel Reclosure-enabled indicator is on. 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 8–83...
Page 556 Selects the relays required to operate when Autoreclose scheme goes to Lockout. No further circuit breaker closure is initiated until the Autoreclose Lockout is Reset. The selected relays operate while the front panel Reclosure Lockout indicator is on. EVENTS Range: Disabled, Enabled Default: Enabled 8–84 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 557 CHAPTER 8: CONTROL AUTORECLOSE Figure 8-33: Autoreclose - AR1 Setup logic diagram - “PAGE 1” 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 8–85...
Page 558 AUTORECLOSE CHAPTER 8: CONTROL Figure 8-34: Autoreclose - AR1 Setup logic diagram - “PAGE 2” 8–86 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 559: Initiate
Ph IOC 1 OP Ph IOC 2 OP Ntrl TOC 1 OP Ntrl TOC 2 OP Ntrl IOC 1 OP Ntrl IOC 2 OP GND TOC 1 OP GND IOC 1 OP 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 8–87...
Page 560: Shot
Reset time of the Autoreclosure for the last shot will result in 850 failure to clear the fault and must be avoided. Doing this causes the relay to fail clearing the fault, and repeat the operation of the Autoreclosure function without reaching the lockout state.
Page 561 Default: Group 1 This setpoint determines the setting group that is used for AR1 Reclose Shot 1. The above setpoints are repeated for each of the Reclose shots 1 through 4. FASTPATH: 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 8–89...
Page 562: Rate Supervision
The setpoint specifies the number of Reclosures per hour that can be attempted before Reclosure goes to Lockout. OUTPUT RELAY X For details see Common Setpoints. EVENTS Range: Disabled, Enabled Default: Disabled 8–90 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 563 CHAPTER 8: CONTROL AUTORECLOSE Figure 8-35: Autorecloser - AR1 Rate Supervision logic diagram - “PAGE 3” 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 8–91...
Page 564: Current Supervision
The setpoint specifies the fault current level, which, when exceeded, sets the Shot Counter to maximum and with Reclosure initiates taking the scheme to Lockout without reclosing. For this setting to take effect Current Supervision to Lockout must be enabled. 8–92 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 565 AUTORECLOSE LOCKOUT Range: Disabled, Enabled Default: Disabled The selection of the Enabled setting enables Current Supervision to Lockout if the fault current exceeds the specified level. EVENTS Range: Disabled, Enabled Default: Enabled 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 8–93...
Page 566 AUTORECLOSE CHAPTER 8: CONTROL Figure 8-36: Autorecloser - AR1 Current Supervision logic diagram - “PAGE 4” 8–94 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 567: Zone Coordination
If this continues to the maximum number of shots programmed in the 850, the Autoreclose scheme goes to Lockout. If the fault is transient, then the Autoreclose scheme and shot counter are reset by the normal reset mechanism.
Page 568 Range: 0.000 to 6000.000 s in steps of 0.001 s Default: 0.020 s If the (phase or neutral) fault current drops, the downstream Reclose opening is declared for the duration of Coordination Dropout Time. EVENTS Range: Disabled, Enabled Default: Enabled 8–96 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 569 CHAPTER 8: CONTROL AUTORECLOSE Figure 8-38: Autoreclose - AR1 Zone Coordination - “PAGE 5” 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 8–97...
Page 570: Ct Supervision
The 850 relay provides a CT Supervision element that uses three distinct checks that can be enabled or disabled individually once the overall function is enabled. These three checks are sequence check, differential check, and symmetry check.
Page 571 CT errors at higher currents. With higher currents, a higher total difference is tolerated. However, an additional maximum load current supervision check is added to limit the CT failure detection during real fault conditions. 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 8–99...
Page 572 I and lower than the maximum load current I . This additional maximum Lmin Lmax load current supervision ensures that the symmetry check does not operate when a real 8–100 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 573 Default: 0.100 x CT This setting is part of the sequence check and it represents the threshold for zero sequence current measurement. This zero sequence current is calculated from the set of 3 Phase CTs. 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 8–101...
Page 574 This setting only applies to the differential check portion of the element. Other elements in the relay will remain unaffected. Refer to the Differential Check Ground Inputs figure for additional grounding information FASTPATH: and CT polarity setting. 8–102 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 575 BLOCK Range: Off, Any FlexLogic operand Default: Off OUTPUT RELAY X For details see Common Setpoints. EVENTS Range: Disabled, Enabled Default: Enabled TARGETS Range: Disabled, Self-Reset, Latched Default: Latched 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 8–103...
Page 576 CT SUPERVISION CHAPTER 8: CONTROL Figure 8-40: CT Supervision logic diagram 8–104 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 577: Vt Fuse Failure (Vtff)
VT FUSE FAILURE (VTFF) VT Fuse Failure (VTFF) The 850 relay provides one VT Fuse Failure. The VT Fuse Failure detector can be used to raise an alarm and/or block elements that may operate incorrectly for a full or partial loss of AC potential caused by one or more blown fuses.
Page 578 VT FUSE FAILURE (VTFF) CHAPTER 8: CONTROL Figure 8-41: VT Fuse Failure logic diagram 8–106 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 579: Flexlogic And Other Setpoints
This chapter describes the FlexLogic and Testing setpoints in detail. Flexlogic setpoints provide access to the variable logic used with the relay. Testing setpoints include simulated current and voltage inputs, and test operations for LEDs, input contacts, and output relays. 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 9–1...
Page 580 CHAPTER 9: FLEXLOGIC AND OTHER SETPOINTS Figure 9-2: Main Setpoints HMI Screen Factory setpoints, as seen in the HMI Main Setpoints Screen, are for GE internal use only. These cannot be accessed by users. Figure 9-3: Enervista 8 Series Setup software Setpoints Menu...
Page 581 NOTE Figure 9-4: FlexLogic Display Hierarchy The states of all digital signals used in the 850 are represented by flags (FlexLogic™ operands). A digital “1” is represented by a 'set' flag. Any external contact change-of-state can be used to block an element from operating, as an input to a control feature in a 850 FEEDER PROTECTION SYSTEM –...
Page 582 Some types of operands are present in the relay in multiple instances; e.g. contact and remote inputs. These types of operands are grouped together (for presentation purposes only) on the faceplate display. The characteristics of the different types of operands are listed in the table below. 9–4 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 583 BKR[X] Disconnected Breaker has been detached from the power system BKR[X] Configured Breaker status contact is configured [X] - the element number. Breaker Arcing BKR1 Arc OP Breaking arcing 1 element operated 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 9–5...
Page 584 Phase C from current demand element has picked up RealPwr Dmd PKP Real power demand has picked up ReactvPwr Dmd PKP Reactive power demand has picked up ApprntPwr Dmd PKP Apparent power demand has picked up 9–6 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 585 The same set of operands as per Harmonic Detection 1 Load Encroachment Load Encro [X] PKP Load encroachment protection has picked up Load Encro [X] OP Load encroachment protection has operated [X] - the element number. 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 9–7...
Page 586 BKR[X] Close Relay Select setpoint Over-Frequency Overfreq 1 PKP Overfrequency 1 has picked up Overfreq 1 OP Overfrequency 1 has operated Overfreq 2 The same set of operands as per Overfreq 1 9–8 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 587 # – any remote input number Rem Ip # OFF Remote Modbus Device FlexLogic Operand [X] On [X] - the element number. Note the operand name will change depending FlexLogic Operand [X] Off on what is programmed. 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 9–9...
Page 588 SW[X] Not Configured No contact Input 89a or 89b is programmed to reflect the status of SW[X] [X] - the element number. Note the operand name will change depending on what is programmed. 9–10 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 589 Phase voltage of undervoltage restoration element has operated Aux UV Restore PKP Auxiliary voltage of undervoltage restoration has element picked up Aux UV Restore OP Auxiliary voltage of undervoltage restoration element has operated 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 9–11...
Page 590 (positive) for only one DUAL ONE SHOT One shot that responds pass through the to both the positive and FlexLogic equation. There negative going edges. is a maximum of 64 ‘one shots’. 9–12 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 591 A timer operator (for example, "TIMER 1") or Virtual Output assignment (for example, " = Virt Op 1") may only be used once. If this rule is broken, a syntax error will be declared. 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 9–13...
Page 592 Range: 0 to 60000 s in steps of 1 s Default: 0 s The setpoint sets the time delay to Dropout. If a Dropout delay is not required, set this function to "0”. 9–14 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 593: Non-Volatile Latches
Range: Any FlexLogic operand Default: Off If asserted, this specified FlexLogic operand ‘SET’ NV LATCH 1. LATCH 1 RESET Range: Any FlexLogic operand Default: Off If asserted, this specified FlexLogic operand ‘RESET’ NV LATCH 1. 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 9–15...
Page 594: Flexlogic Equation
File Conversion and Handling of Time Stamps: When File Conversion is applied the three time stamps are processed (either carry forwarded, defaulted, updated with latest PC time) based on the Source and Destination File versions and Order code supported. 9–16 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 595 • If the ‘Logic Designer’ is open and in saved mode (no edits to save or compile), the ‘Logic Designer’ screen is closed and then the ‘FlexLogic Equation Editor’ launch is initiated. 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 9–17...
Page 596: Viewing Flexlogic Graphics
It is strongly recommended and helpful to view an equation as a graphic diagram before it is saved to the 850 device in order to troubleshoot any possible error in the equation.
Page 597 “Off”. For proper operation of the element at least one input must be selected. Otherwise, the element will not assert its output operands. 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 9–19...
Page 598 BASE = 100% BASE Frequency = nominal frequency as entered under the SYSTEM BASE SETUP menu Volt/Hz BASE = 1.00 RTDs BASE = 1.00°C t (arcing Amps) BASE = 2000 kA *cycle 9–20 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 599 Vab input is 66.4 V *120 = 7.968kV. The analog input J2 Vaux is directly measured phase-phase voltage and its primary RMS nominal voltage is 115V *120 = 13.8kV = max (7.968kV, 13.8kV) = 13.8kV. BASE 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 9–21...
Page 600 Hysteresis setpoint to the desired percentage can define the PF value at which the cap bank can be switched off. For example, if the cap bank is required to be switched off at PF value of -0.9, than the percent hysteresis is computed as: 9–22 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 601 A FlexElement can be programmed to detect the Top-Bottom oil difference, and issue an alarm, trip, or energize a contact used 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 9–23...
Page 602 Hysteresis: 0.0 % To configure the pickup setpoint for a total arcing current of 5000kA /cycle, the per-unit pickup value can be calculated as follows: Pickup = 5000kA *cycle/2000 kA *cycle = 2.500 pu 9–24 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 603: Testing
The 8 Series can simulate current and voltage inputs when the Simulation feature is enabled. Other test operations are also possible such as the LED lamp test of each color, contact input states and testing of output relays. 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 9–25...
Page 604: Simulation
When in test mode, and Force Relays is “Disabled”, the relay states maintain their normal operation. Forcing of output relay states is not performed when the Simulation State is “Disabled”. 9–26 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 605: Pre-Fault
CT Bank GROUND CT PRIMARY setpoint. For Sensitive Ground CT, the magnitude is entered as a multiple of the corresponding CT Bank SENS GROUND CT PRIMARY setpoint. J1(K1) Prefault la(lb,lc,lg) Angle: Range: -359.9° to 0.0° in steps of 0.1 Default: 0.0° 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 9–27...
Page 606: Fault
For Sensitive Ground CT: 0.000 to 4.600 x CT in steps of 0.001 x CT Default: 0.000 x CT J1(K1) Fault la(lb,lc,lg) Angle: Range: -359.9° to 0.0° in steps of 0.1 Default: 0.0° 9–28 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 607: Post-Fault
JK Postfault Phase la(lb,lc): Range: 0.000 to 46.000 x CT in steps of 0.001 x CT Default: 0.000 x CT JK Postfault la(lb,lc) Angle: Range: -359.9° to 0.0° in steps of 0.1 Default: 0.0° 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 9–29...
Page 608: Test Leds
The number of Output Relays available is dependent on the installed Order Code options. Output Relays setpoints here (in test mode) will revert to default values at power-up. NOTE: Path: Setpoints > Testing > Output Relays NOTE OUTPUT RELAY X Range: Off, On Default: Off 9–30 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 609 Grid Solutions 850 Feeder Protection System Chapter 10: Status Status Figure 10-1: Main Status Screen 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 10–1...
Page 610: Configurable Sld
To reset an active alarm, first highlight the active alarm using the navigation keys, then press the reset button to reset the highlighted alarm. If no indicator is selected, all alarms on the page are reset by pushing the reset button. 10–2 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 611: Tab Pushbuttons
Only the tab pushbuttons that are not set to Disabled are shown in color; labels for the tab pushbuttons are shown for both active and disabled pushbuttons if labels have been configured. (Configure tab pushbuttons from Device > Front Panel > Tab PBs > Tab PB1(X) 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 10–3...
Page 612: Breakers
Range: 0.00 to 42949672.95 kA2-cyc in steps of 0.01 The measure of arcing current from all three phases during breaker trips. Refer to the Breaker Arcing Current element description (under Setpoints > Monitoring > Breaker) for more details. 10–4 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 613: Information
• Boot Time: The Main CPU boot code build time • MAC Address 1: The MAC address for Ethernet port 4 • MAC Address 2: The MAC address for Ethernet port 5 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 10–5...
Page 614: Hardware Versions
EAM stayed in the range specified. • Temp and Humidity (e.g. >40°C and <55%): The accumulated amount of time (hrs) that the temperature and humidity measured by the EAM stayed in the ranges specified. 10–6 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 615: Settings Audit
EVENT Range: 0 to 4294967295 in steps of 1 Default: 0 DATE Range: MM/DD/YYYY HH:MM Default: 01/01/08 00:00:00 PARAMETER 1 to 64 Range: -2147483648 to 2147483647 in steps of 1 Default: 0 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 10–7...
Page 616: Arc Flash
In this case, Output relay is named “Output relay 2”. The value in the column “Value” indicates the logic state of the output relay, it can be “On” or “Off”. 10–8 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 617: Virtual Inputs
The state of all virtual outputs is shown here, see next figure. The value for each Virtual Output is shown on the control panel graphically as a toggle switch in either the On (|) state or the Off (O) state. Figure 10-8: Status of Virtual Outputs, HMI 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 10–9...
Page 618: Flex State
GOOSE message can be a digital or analog value. Messages are launched within one scan of a digital point status change or an analog exceeding its deadband. The 850 server supports a subset of the server features described in part 7.2 of the IEC61850 standard.
Page 619 COMMS NOT VALIDATED DONE Range: YES, NO Default: YES COMMS VALIDATED OK Range: YES, NO Default: YES COMMS VALIDATED DONE Range: YES, NO Default: YES MAIN NOT VALIDATED OK Range: NO, YES Default: NO 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 10–11...
Page 620 Range: NONE, ACTIVE Default: NONE SERIAL DNP Range: NONE, ACTIVE Default: NONE SERIAL IEC103 Range: NONE, ACTIVE Default: NONE ETHERNET MODBUS Range: NONE, ACTIVE Default: NONE ETHERNET DNP Range: NONE, ACTIVE Default: NONE 10–12 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 621 Default: 0 IEC - 104 - Remaining Range: 0 to 99 in steps of 1 Default: 0 OPC - UA - Maximum Range: 0 to 99 in steps of 1 Default: 0 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 10–13...
Page 622: Device Status
Default: YES BREAKER X CONNECTED Range: YES, NO Default: YES BREAKER X CLOSED Range: YES, NO Default: NO BREAKER X TRIPPED Range: YES, NO Default: NO ALARM Range: YES, NO Default: NO 10–14 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 623: Clock Status
If an active master has been selected but lock is not at present established • SYNCH’D (NO PDELAY) If the port is synchronized, but the peer delay mechanism is non-operational • SYNCHRONIZED If the port is synchronized 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 10–15...
Page 624: Autoreclose
The number of reclosures in the past hour is shown in the SHOT RATE PER HOUR value. Shot Cnt Last Rst D/T Range: MM/DD/YY HH:MM Default: 01/01/08 00:00:00 The TOTAL SHOT COUNT value shows the total number of reclosures since the SHOT CNT LAST RST D/T. 10–16 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 625 The phase angles in 8 Series relays are always presented as negative values in the lagging direction as illustrated in the following. Figure 11-1: Phase Angle Measurement 8 Series Convention 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 11–1...
Page 626 VTs; to the A-B voltage phasor for delta-connected VTs; or to the phase A current phasor when no voltage signals are present. Figure 11-2: An example of the Metering menu Figure 11-3: An example of the Metering\Summary submenu 11–2 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 627 EnerVista 8 Series program is shown as follows. Figure 11-4: Current Metering Screen (EnerVista 8 Series) The complete list of actual values available in the Metering menu is covered in the following sections. 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 11–3...
Page 628: Metering Summary
SUMMARY CHAPTER 11: METERING Summary Path: Metering > Summary The Metering Summary menu consists of three display screens, including a graphical presentation of key phasor quantities. 11–4 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 629: Admittance
Neutral (In) Range: 0.000 to 12000.000 A Phase A/B/C (Ia/Ib/Ic RMS) Range: 0.000 to 12000.000 A Ground (Ig RMS) Range: 0.000 to 12000.000 A Sensitive Ground (Isg RMS) Range: 0.000 to 1200.000 A 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 11–5...
Page 630 If all these elements are disabled, the value displayed is "0". For example, if the lowest pickup is 0.5 xCT, and the highest injected phase current is 1 xCT, the displayed value for load-to-trip is 200%. 11–6 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 631: Voltages
Range: 0.00 to 600000.00 V Phase A Angle (Van Angle) Range: 0.0 to 359.9° Phase B Angle (Vbn Angle) Range: 0.0 to 359.9° Phase C Angle (Vcn Angle) Range: 0.0 to 359.9° 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 11–7...
Page 632: Frequency
Frequency Rate of Change (Phase Voltage Input J2-3VT) Range: -20.00 to 20.00 Hz/s Frequency (Auxiliary Voltage Input J2-Vx) Range: 2.000 to 90.000 Hz Frequency Rate of Change (Auxiliary Voltage Input J2-Vx) Range: -20.00 to 20.00 Hz/s 11–8 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 633: Fast Underfrequency
Phase A/B/C Second Harmonic (Phase A/B/C 2) Range: 0.0 to 100.0 % Phase A/B/C Third Harmonic (Phase A/B/C 3) Range: 0.0 to 100.0 % Phase A/B/C Twenty Fifth Harmonic (Phase A/B/C 25) Range: 0.0 to 100.0 % 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 11–9...
Page 634: Harmonic Detection
Range: 2.000 to 90.000 Hz Voltage Difference (Volts Difference) Range: 0.00 to 600000.00 V Voltage Angle Difference (Angle Difference) Range: 0.0 to 359.9° Voltage Frequency Difference (Frequency Difference) Range: 2.000 to 90.000 Hz 11–10 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 635: Power
Power 1 is calculated using 3-phase J1 Currents & 3-phase J2 Voltages. Power 2 is NOTE: calculated using 3-phase K1 Currents & 3-phase J2 Voltages. NOTE Figure 11-5: Flow direction of signed values for watts and VARs 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 11–11...
Page 636 Range: 0.01 Lag to 1.00 to 0.01 Lead Phase B Power Factor (Ph B PF) Range: 0.01 Lag to 1.00 to 0.01 Lead Phase C Power Factor (Ph C PF) Range: 0.01 Lag to 1.00 to 0.01 Lead 11–12 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 637: Energy
Metering > Power 1 since the supervision conditions are applied in the element. Path: Metering > Power Factor POWER FACTOR 1(X) Range: -0.99 to 1.00 in steps of 0.01 Default: 0.00 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 11–13...
Page 638: Current Demand
Range: 0.0 kvar to 214748364.7 kvar D/T Reactive Dmd MM/DD/YY 00:00:00 Apparent Demand (Apparent Dmd) Range: 0.0 kVA to 214748364.7 kVA Max Apparent Dmd Range: 0.0 kVA to 214748364.7 kVA D/T Apparent Dmd MM/DD/YY 00:00:00 11–14 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 639: Thermal Capacity
The menu displays the wattmetric ground fault element operating power value. Wattmetric Ground Fault 1 Range: -21474836.48 W to 21474836.47 W Default: 0.00 W Wattmetric Ground Fault X Range: -21474836.48 W to 21474836.47 W Default: 0.00 W 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 11–15...
Page 640: Transient Ground Fault Detection
CT Supervision monitoring element. CTS X SYM QUOTIENT Range: 0.00 to 1.00 in steps of 0.01 Default: 0.00 This value is the quotient (I ) from the symmetry check in the CT Supervision element. 11–16 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 641: Rtds
The Temperature can be displayed in Celsius or Fahrenheit. The selection is made in NOTE: Setpoints > Device > Installation > Temperature Display. NOTE RRTD 1(12) 40°C Range: -40 to 250°C (temperatures < -40°C or temperatures >250°C are displayed as “Trouble RRTD”) 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 11–17...
Page 642: Rtd Maximums
Temperatures < -40°C are displayed as “Shorted” and temperatures > 250°C are displayed as “Open RRTD”. RRTD 1(12) Date/Time Range: DD/MM/YY hh/mm/ss Analog Inputs Path: Metering > Analog Inputs Analog Ip 1 (4) Range: -500000 to 500000 units in steps of 1 11–18 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 643: Flexelements
FlexEI 1 Op Signal FlexEI 2 Op Signal FlexEI 3 Op Signal FlexEI 4 Op Signal FlexEI 5 Op Signal FlexEI 6 Op Signal FlexEI 7 Op Signal FlexEI 8 Op Signal 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 11–19...
Page 644 FLEXELEMENTS CHAPTER 11: METERING 11–20 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 645: Events
Records Events The 850 has an event recorder which runs continuously. All event records are stored in flash memory such that information is permanently retained. The events are displayed from newest to oldest event. Each event has a header message containing a summary of the event that occurred, and is assigned an event number equal to the number of events that have occurred since the recorder was cleared.
Page 646: Transient Records
Viewer” button to view the waveform. Data Logger The 850 Data Logger record can be retrieved and seen from this window. It displays the oldest and newest timestamps, and the total number of samples captured for all channels programmed in Setpoints > Device > Data Logger menu.
Page 647 Phase C Current (IC) FAULT DISTANCE FAULT REPORT CALCULATION TYPE OF FAULT Neutral Current (3I0) FAULT REPORT Voltage Inputs DISTANCE TO FAULT DELTA Vn or V 0 Type of Fault (Phase selector) 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 12–3...
Page 648: Breakers Records
Range: 00.00 TO 42949672.95 Ka2-cyc in steps of 0.01 AVG. OF 5 PH A/B/C ARC TIME Range: 0 TO 4294967295 ms in steps 1 AVG. OF PH A/B/C ARC TIME Range: 0 TO 4294967295 ms in steps 1 12–4 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 649: Digital Counters
COUNTER X FROZEN Range: -2147483648 to 2147483647 in steps of 1 DATE/TIME FROZEN Default: 01/01/70 00:00:00 Range: Date/Time Format (MM/DD/YY HH:MM:SS) COUNTER X us FROZEN Range: 0 to 999999 µs in steps of 1 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 12–5...
Page 650: Remote Modbus Device
FlexLogic name defined in the Generic Modbus Device Setpoint label field in the CID file. The value displayed is based on the Format Code field defined in the Generic Modbus Device Setpoint for a specific digital value in the CID file. 12–6 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 651 FlexAnalog name defined in the Generic Modbus Device Setpoint label field in the CID file. The value displayed is based on the Data Type and the Units field defined in the Generic Modbus Device Setpoint for a specific analog value in the CID file. 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 12–7...
Page 652: Clear Records
Records can be cleared by assigning “On” to the appropriate setting. The Clear Records command is also available from , where the Device > Clear Records FASTPATH: allowable settings also include FlexLogic operands. 12–8 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 653 Relay Firmware in Chapter 3, Interfaces > Software Interface > Upgrading Relay Firmware. Path: Maintenance > Environmental Awareness Health Report Over the life of the 850 product remedial action can be required. The 850 has a module which can record environmental data. 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 654 Prolonged exposure to harsh environments and transient conditions that exceed those stated in Section 1 - Specifications reduce the life of electronic products. The 850 has an Environmental Awareness Module (EAM) to record environmental data over the life of the product.
Page 655: Maintenance Environmental Health Report
CHAPTER 13: MAINTENANCE ENVIRONMENTAL HEALTH REPORT Figure 13-1: Environmental Report 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 13–3...
Page 656: General Maintenance
General Maintenance The 850 requires minimal maintenance. As a microprocessor-based relay, its characteristics do not change over time. The expected service life of a 850 is 20 years when the environment and electrical conditions are within stated specifications. While the 850 performs continual self-tests, it is recommended that maintenance be scheduled with other system maintenance.
Page 657: Warranty
Appendix A includes the warranty and revision history. Warranty For products shipped as of 1 October 2013, GE Digital Energy warrants most of its GE manufactured products for 10 years. For warranty details including any limitations and disclaimers, see the GE Digital Energy Terms and Conditions at https:// www.gegridsolutions.com/multilin/warranty.htm...
Page 658: Revision History
Membrane Front Panel, 850-E / 850-D / 850-P models. cover Manual revision number from AB to AC, 850 version updated to 2.2x Introduction updated to include 850-E, 850-D, and 850-P options. Note and link to online store for available order codes updated.
Page 659 Chapter SECTION and CHANGES cover Manual revision number from AA to AB, 850 version updated to 2.0x Added Accessories list to Order Code section Added note to Order Code section: Refer to the online store for available order code combinations.
Page 660 Added new Ethernet Loopback test section to Setpoints > Testing Table A-5: Major Updates for 850-AA PAGE PAGE CHANGES NUMBER NUMBER (A9) (AA) Manual revision number from A9 to AA, 850 version updated to cover cover 1.7x A–4 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...
Page 661 PAGE PAGE CHANGES NUMBER NUMBER (A8) (A9) Manual revision number from A8 to A9, and 850 version cover cover updated to 1.6x cover cover Replaced GE Digital Energy with GE Grid Solutions throughout Added Harmonic detection specification to Specifications >...
Page 662 NUMBER NUMBER (A7) (A8) Manual revision number from A7 to A8, 850 version updated to 1.5x Updated 850 order codes, see slots B, C, G and H Added Arc Flash specifications to Specifications>Protection Added Analog Inputs and Analog Outputs to Specifications>...
Page 663 Synchrocheck General Minor Corrections Table A-10: Major Updates for 850-A5 PAGE NUMBER CHANGES Manual revision number from A4 to A5, 850 version updated to 1.2x Chapter 1 Updated some specifications Replaced screen captures with latest version, updated flexlogic Chapter 4...
Page 664 Revised Line VT Connections diagram from A1 to A2 General Minor Corrections Table A-13: Major Updates for 850-A2 PAGE NUMBER CHANGES Manual revision number from A1 to A2 Chapter 2 Revised Typical wiring diagram-Draw out unit General Minor Corrections A–8 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL...

GE 850 Instruction Manual

3 INTERFACES Front Control Panel Interface

4 About Setpoints

5 Device, System, Input and Output Setpoints

7 Monitoring

Trip and Close Circuit Monitoring

8 CONTROL Setpoint Group

9 Flexlogic and Other Setpoints

Quick Links

Related Manuals for GE 850

Summary of Contents for GE 850