GE Feeder Management Relay 750 Instruction Manual

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GE Multilin

215 Anderson Avenue, Markham, Ontario

Canada L6E 1B3

Tel: (905) 294-6222 Fax: (905) 294-2098

Internet: http://www.GEindustrial.com/multilin

Courtesy of NationalSwitchgear.com

750/760

Feeder Management Relay

Instruction Manual

Manual P/N: 1601-0044-AP (GEK-106293D)

760 STATUS

SYSTEM STATUS

OUTPUT STATUS

RELAY IN SERVICE

BREAKER OPEN

TRIP

BREAKER CLOSED

RECLOSURE

ALARM

ENABLED

RECLOSURE

PICKUP

DISABLED

SETPOINT

RECLOSURE

GROUP 1

IN PROGRESS

SETPOINT

RECLOSURE

GROUP 2

LOCKOUT

SETPOINT

LOCAL

GROUP 3

RESET

OPEN

BREAKER

SETPOINT

REMOTE

GROUP 4

PROGRAM PORT

SETPOINT

MESSAGE

ACTUAL

CLEAR

VALUE

STORE

760

Feeder Management

Firmware Rev: 5.X

1 TRIP

2 CLOSE

3 AUXILIARY

4 AUXILIARY

5 AUXILIARY

6 AUXILIARY

7 AUXILIARY

SELF-TEST

WARNING

HELP

818789A4.CDR

GE Industrial Systems

ISO9001:2000

GE Multilin's Quality

Management System is

registered to ISO9001:2000

QMI # 005094

UL # A3775

Table of Contents

Summary of Contents for GE Feeder Management Relay 750

Page 1 GE Industrial Systems 750/760 ® Feeder Management Relay Instruction Manual Firmware Rev: 5.X Manual P/N: 1601-0044-AP (GEK-106293D) Copyright © 2006 GE Multilin 760 STATUS SYSTEM STATUS OUTPUT STATUS RELAY IN SERVICE BREAKER OPEN 1 TRIP TRIP BREAKER CLOSED 2 CLOSE...
Page 2 Courtesy of NationalSwitchgear.com...
Page 3: Table Of Contents
4.1 FRONT PANEL INTERFACE 4.1.1 Description ......................4-1 4.1.2 LED Status Indicators ..................4-2 4.1.3 Keypad Operation ....................4-3 4.1.4 Messages......................4-4 4.2 750/760PC SOFTWARE INTERFACE 4.2.1 Description ......................4-7 4.2.2 Requirements..................... 4-7 GE Multilin 750/760 Feeder Management Relay Courtesy of NationalSwitchgear.com...
Page 4 Negative Sequence ..................5-58 5.6.7 Voltage......................5-63 5.6.8 Frequency ......................5-68 5.6.9 Breaker Failure ....................5-71 5.6.10 Reverse Power (if Enabled) ................5-72 5.7 S6 MONITORING 5.7.1 Current Level ....................5-73 5.7.2 Power Factor ....................5-75 5.7.3 Fault Locator .....................5-76 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 5 Revision Codes ....................6-19 6.6.3 Calibration Dates....................6-19 7. COMMUNICATIONS 7.1 OVERVIEW 7.1.1 Protocols ......................7-1 7.1.2 Physical Layer....................7-1 7.2 MODBUS PROTOCOL 7.2.1 Description ......................7-2 7.2.2 Data Link Layer ....................7-2 GE Multilin 750/760 Feeder Management Relay Courtesy of NationalSwitchgear.com...
Page 6 VT Failure ......................8-36 8.5.8 Trip Coil Monitor ....................8-37 8.5.9 Close Coil Monitor ....................8-37 8.5.10 Breaker Operation Failure ................8-37 8.5.11 Arcing Current....................8-38 8.5.12 Analog Output Channels...................8-38 8.5.13 IRIG-B .......................8-38 8.5.14 Pulse Output .....................8-38 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 7 On-Load Testing ....................8-56 8.7.3 Dielectric Strength Testing ................8-57 A. APPENDIX A.1 RELAY MODS A.1.1 Reverse Power....................A-1 A.2 CONFORMITY A.2.1 EU Declaration of Conformity................A-3 A.3 WARRANTY A.3.1 GE Multilin Warranty ..................A-4 GE Multilin 750/760 Feeder Management Relay Courtesy of NationalSwitchgear.com...
Page 8 TABLE OF CONTENTS 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 9: Getting Started
• registration card (attached as the last page of the manual) • Fill out the registration form and mail it back to GE Multilin (include the serial number located on the rear nameplate). • For product information, instruction manual updates, and the latest software updates, please visit the GE Multilin web- site at www.GEindustrial.com/multilin.
Page 10: Using The Relay
Press the ESCAPE key twice to return to the sub-page header. A2 METERING DMND ESCAPE PHASE A CURRENT [ENTER] for more 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 11: Panel Keying Example
NOMINAL VT SECONDARY VOLTAGE NOMINAL VT SECONDARY VOLTAGE: 120.0 V Press the 6, 3, decimal, and 9 keys. The display message will change as shown. NOMINAL VT SECONDARY VOLTAGE: 63.9 V GE Multilin 750/760 Feeder Management Relay Courtesy of NationalSwitchgear.com...
Page 12 The editing and storing of a text value is accomplished with the use of the , and keys. ENTER ESCAPE VALUE VALUE 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 13: Application Example
Instantaneous Overcurrent 1: Pickup = 840 A; Phases Required = Any Two; Delay = 0 seconds Instantaneous Overcurrent 2: Pickup = 10100 A; Phases Required = Any Two; Delay = 0 seconds GE Multilin 750/760 Feeder Management Relay Courtesy of NationalSwitchgear.com...
Page 14 LOCAL MODE: "Input 6" RESET: "Input 4" REMOTE OPEN: "Input 5" REMOTE CLOSE: To setup an Alarm-after-Delay Input. make the following changes to the setpoints page: S3 LOGIC INPUTS USER INPUT A 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 15 GROUND INST O/C FUNCTION: "Disabled" S5 PROTECTION NEGATIVE SEQUENCE NEG SEQ TIME OC NEG SEQ TIME OC FUNCTION: "Disabled" S5 PROTECTION NEGATIVE SEQUENCE NEG SEQ INST OC NEG SEQ INST O/C FUNCTION: GE Multilin 750/760 Feeder Management Relay Courtesy of NationalSwitchgear.com...
Page 16: Commissioning
Extensive commissioning tests are available in Chapter 8: Commissioning Tests. Commissioning tables for recording required settings are available in Microsoft Excel format from the GE Multilin website at http://www.GEindustrial.com/multi- lin. The website also contains additional technical papers and FAQs relevant to the 750/760 Feeder Management Relay.
Page 17: Introduction
SENSITIVE GROUND OPERATING CURRENT 50SG 67SG 51SG Control 818840AD.dwg * POLARIZING CURRENT AND GND CURRENT ARE MUTUALLY EXCLUSIVE SINCE BOTH USE THE SAME RELAY CT INPUT TERMINALS Figure 2–1: FUNCTIONAL BLOCK DIAGRAM GE Multilin 750/760 Feeder Management Relay Courtesy of NationalSwitchgear.com...
Page 18 Breaker Operation Failure Trip/Close Circuit Failure Total Breaker Arcing Current VT Failure Demand (A, MW, Mvar, MVA) Analog Input Event Recording Analog Output Fault Locator Trip Counter FEATUR60/50.AI Figure 2–2: SUMMARY OF FEATURES 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 19: Theory Of Operation
Contact inputs are debounced to eliminate false operations due to noise. The inputs must be in the same state for three consecutive readings spaced evenly over one power frequency cycle before a new state is recognized. GE Multilin 750/760 Feeder Management Relay...
Page 20 2.1 OVERVIEW 2 INTRODUCTION Figure 2–3: HARDWARE BLOCK DIAGRAM 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 21: Ordering
SR 1 3/8" COLLAR: For shallow switchgear, the collar reduces the depth of the relay by 1 3/8" • SR 3" COLLAR: For shallow switchgear, the collar reduces the depth of the relay by 3" GE Multilin 750/760 Feeder Management Relay Courtesy of NationalSwitchgear.com...
Page 22: Specifications
< 0.1 × CT: ±0.2% of 1 × CT at ≥ 0.1 × CT: ±1% of 1 × CT Overload withstand: 1 second at 80 × rated current continuous at 3 × rated current 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 23: Measured Parameters
≥ 1.03 × PU greater) at ≥ 1.03 × PU VOLTAGE RESTRAINED PHASE TOC Pickup adjustment: Modifies pickup from 0.10 to 0.90 × VT nominal in a fixed line relationship GE Multilin 750/760 Feeder Management Relay Courtesy of NationalSwitchgear.com...
Page 24 Angle accuracy: ±2° Curve multiplier: 0.00 to 100.00 in steps of 0.01 Operation delay: 25 to 40 ms Reset type: Instantaneous/Linear Level accuracy: 3 × voltage input error Timing accuracy: ±50 ms 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 25: Monitoring Elements
0 to 100 ms in steps of 1 TRIP / CLOSE COIL MONITORS Detect open trip and close circuits. PULSED OUTPUT Pulsed output is 1 second on time and one second off time after the programmed interval. GE Multilin 750/760 Feeder Management Relay Courtesy of NationalSwitchgear.com...
Page 26: Control Elements
Up to four (4) before lockout. Blocking: Each reclose shot can block IOC and raise TOC Pickup. Adjustability: Current supervision can adjust the maxi- mum number of shots to be attempted. 2-10 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 27: Outputs
Accuracy with IRIG-B: ±1 ms Protocol: Modbus RTU or DNP 3.0 protocol Accuracy without IRIG-B: ±1 minute/month Backup battery life: 10 years continuous use EEPROM 100000 program/erase cycles max. GE Multilin 750/760 Feeder Management Relay 2-11 Courtesy of NationalSwitchgear.com...
Page 28: Physical
2.2.12 APPROVALS Recognized under E83849 Conforms to IEC 947-1, IEC 1010-1 Approved under LR 41286-56 Manufactured to an ISO9001 registered program. Specifications subject to change without notice. NOTE 2-12 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 29: Mechanical
As such, a separate seal can be installed on the outside of the door to prevent it from being opened. Figure 3–2: DRAWOUT CASE SEAL GE Multilin 750/760 Feeder Management Relay Courtesy of NationalSwitchgear.com...
Page 30 After bending all tabs, the case will be securely mounted so that its relay can be inserted. The SR unit is now ready for panel wiring. Figure 3–4: MOUNTING TABS 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 31: Unit Withdrawal And Insertion
When the stop position is reached, the locking mechanism will release. The relay will now slide out of the case when pulled from its handle. To free the relay, it may sometimes be necessary to adjust the handle position slightly. GE Multilin 750/760 Feeder Management Relay...
Page 32 No special ventilation requirements need to be observed during the installation of the unit. NOTE The unit does not require cleaning. NOTE 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 33: Rear Terminal Layout
WARNING levels! HAZARD may result if the product is not used for its intended purposes. WARNING Figure 3–8: REAR TERMINAL LAYOUT GE Multilin 750/760 Feeder Management Relay Courtesy of NationalSwitchgear.com...
Page 34 LOGIC INPUT 13 PHASE VT NEUTRAL (BUS) LOGIC INPUT 14 PHASE A CT RESERVED PHASE B CT RESERVED PHASE C CT RESERVED GROUND CT RESERVED CONTROL POWER - DC NEGATIVE CONTROL POWER + 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 35: Electrical
3 INSTALLATION 3.2 ELECTRICAL 3.2ELECTRICAL 3.2.1 TYPICAL WIRING Figure 3–9: TYPICAL WIRING DIAGRAM GE Multilin 750/760 Feeder Management Relay Courtesy of NationalSwitchgear.com...
Page 36: Phase Sequence And Transformer Polarity
These connections will be shown on the terminal assignment label on the back of the relay’s case. The Sensitive Ground input (G3 and H3 terminals) must only be used on systems where the maximum ground cur- rent does not exceed 500 A. NOTE 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 37 3 INSTALLATION 3.2 ELECTRICAL Figure 3–10: GROUND INPUTS Figure 3–11: SENSITIVE GROUND INPUTS GE Multilin 750/760 Feeder Management Relay Courtesy of NationalSwitchgear.com...
Page 38 The various CT connections and the exact placement of a Zero Sequence CT, so that ground fault current will be detected, are shown in the figure below. Twisted pair cabling on the Zero Sequence CT is recommended. Figure 3–13: ZERO SEQUENCE (CORE BALANCE) CT INSTALLATION 3-10 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 39: Voltage Inputs
The single phase input is designated as the “line voltage”. The line VT input channel, used for the synchrocheck feature, can be connected for phase-neutral voltages V , or V ; or for phase-phase voltages V or V as shown below. GE Multilin 750/760 Feeder Management Relay 3-11 Courtesy of NationalSwitchgear.com...
Page 40: Control Power
When the breaker is open, the 52a auxiliary contact is also open and no trickle current will flow. When the breaker position monitoring inputs detect an open breaker, the trip coil supervision monitoring function will be disabled. 3-12 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 41 A above, continuous coil monitoring regardless of breaker state is possible without using a resistor to bypass the 52a/b contact. A high speed solid state (SCR) output is also provided. This output is intended for applications where it is required to key a communications channel. GE Multilin 750/760 Feeder Management Relay 3-13 Courtesy of NationalSwitchgear.com...
Page 42: Logic Inputs
Both terminals are clamped to within 36 V of ground with surge protection. As such, common mode voltages should not exceed this limit. Shielded wire, with only one end of the shield grounded, is recom- mended to minimize noise effects. 3-14 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 43: Analog Outputs
For a 0 to 5 mA channel this resistor would be 1 kW and for a 4 to 20 mA channel this resistor would be 250 Ω. The Analog Output connection diagram is shown below. Figure 3–18: ANALOG OUTPUT CONNECTION GE Multilin 750/760 Feeder Management Relay 3-15...
Page 44: Rs485 And Rs422 Communications
To ensure maximum reliability, all equipment should have similar transient protection devices installed. Figure 3–19: RS485 WIRING DIAGRAM 3-16 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 45 3 INSTALLATION 3.2 ELECTRICAL Figure 3–20: RS422 WIRING DIAGRAM GE Multilin 750/760 Feeder Management Relay 3-17 Courtesy of NationalSwitchgear.com...
Page 46: Rs232 Communications
(AM) form. 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 syn- chronized. GPS SATELLITE SYSTEM GPS CONNECTION OPTIONAL GE MULTILIN IRIG-B SR FAMILY RG58/59 COAXIAL CABLE TIME CODE GENERATOR...
Page 47: User Interfaces
Trip and alarm condition messages will automatically override default messages. Figure 4–1: 750/760 FRONT PANEL GE Multilin 750/760 Feeder Management Relay Courtesy of NationalSwitchgear.com...
Page 48: Led Status Indicators
RECLOSURE DISABLED (760 only): This indicator will be on continuously when autoreclosure is not allowed to oper- ate as programmed. This is when the autoreclose function setpoint is disabled, or if used, the block reclosure logic 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 49: Keypad Operation
They also decre- VALUE VALUE ment and increment numerical setpoints. Numerical setpoints may also be entered through the numeric keypad. GE Multilin 750/760 Feeder Management Relay Courtesy of NationalSwitchgear.com...
Page 50: Messages
Record the failure in the Event Recorder. Upon detection of a major problem, the relay will (if possible) also: • Turn off the Relay In Service LED. • Inhibit operation of all output relays. 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 51 CHANGE PASSCODE CODE NOT STORED prompt is different from the one entered ENTER A NEW PASSCODE PLEASE ENTER A prompt, the relay dumps the new passcode and display this message NEW PASSCODE GE Multilin 750/760 Feeder Management Relay Courtesy of NationalSwitchgear.com...
Page 52 S1 RELAY SETUP PASSCODE RESTRICT ACCESS TO SETPOINTS IS NOW RESTRICTED The command to restrict access to setpoints has been successfully executed and set- points cannot be changed. 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 53: 750/760Pc Software Interface
To communicate with the relay via the rear RS485 ports, the GE Multilin F485 RS232/RS485 Converter box is needed. The F485 converter box is connected to the relay using a “straight-through” serial cable. A shielded twisted pair (20, 22 or 24 AWG) cable is used to connect the converter box to the 750/760 rear terminals.
Page 54: Installation/Upgrade
If 750/760PC is already installed, run the program and check if it needs upgrading as follows: While 750/760PC is running, insert the GE Multilin Products CD and allow it to autostart (alternately, load the D:\index.htm file into your default web browser, OR Go to the GE Multilin website at http://www.GEindustrial.com/multilin (preferred method).
Page 55 Windows 3.1, open the Products CD by launching the index.htm file in the CD root directory. The Products CD is essentially a “snapshot” of the GE Multilin website at the date printed on the CD. As such, the pro- cedures for installation from the CD and the web are identical;...
Page 56: Startup And Communications Configuration
RS232/RS485 converter. If connected through the 750/760 front pane RS232 port, select “No Control Type”. If connected through a GE Multilin F485 converter unit, select “MULTILIN RS232/RS485 CONVERTOR”. If connected through a modem, select “Modem”. If a third- party RS232/RS485 converter is being used, select the appropriate control type from the available list based on the manufacturer’s specifications.
Page 57: Using 750/760Pc
A warning message will appear (remember that all previously programmed setpoints will be erased). If you have not yet saved the current setpoints to a file, click No to exit. Otherwise, click Yes to proceed. GE Multilin 750/760 Feeder Management Relay 4-11 Courtesy of NationalSwitchgear.com...
Page 58 750/760PC will launch the Open window and list all filenames in the 750/760 default directory with the 750/760 exten- sion. Select the setpoint file to download and click OK to continue. 4-12 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 59 For setpoints requiring an alphanumeric text string (e.g. message scratchpad messages), the value may be entered directly within the setpoint value box. GE Multilin 750/760 Feeder Management Relay 4-13 Courtesy of NationalSwitchgear.com...
Page 60 Establish communications with the 750/760. Select the File > Print Setup menu item. Select Actual Values and click OK. Select the File > Print menu item to print the 750/760 actual values. 4-14 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 61: Advanced 750/760Pc Features
The Save button stores the current image on the screen to a CSV (comma delimited) file, and Open recalls saved waveforms in CSV format. Waveform captures can also be printed from this window. GE Multilin 750/760 Feeder Management Relay 4-15...
Page 62 The Event Recorder Selector at the top of the View Data window scrolls through different events. Select Save to store the details of the selected events to a file. Select Print to send the events to the system printer, and OK to close the window. 4-16 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 63 Selecting Setpoint > User Map opens the window below. This window allows the desired addresses to be written to User Map locations. The User Map values that correspond to these addresses are then displayed. Figure 4–9: USER MAP WINDOW GE Multilin 750/760 Feeder Management Relay 4-17...
Page 64 4.2 750/760PC SOFTWARE INTERFACE 4 USER INTERFACES 4-18 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 65: Setpoints
[ENTER] for more MESSAGE ESCAPE MESSAGE ð SETPOINTS LOGIC INPUTS SETUP ENTER See page 5–19. S3 LOGIC INPUTS ESCAPE [ENTER] for more BREAKER FUNCTIONS ESCAPE See page 5–21. [ENTER] for more MESSAGE GE Multilin 750/760 Feeder Management Relay Courtesy of NationalSwitchgear.com...
Page 66 FREQ ESCAPE See page 5–68. [ENTER] for more MESSAGE BRKR FAILURE ESCAPE See page 5–71. [ENTER] for more MESSAGE REV PWR ESCAPE See page 5–72. [ENTER] for more MESSAGE ESCAPE MESSAGE 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 67 ESCAPE [ENTER] for more PICKUP TEST ESCAPE See page 5–130. [ENTER] for more MESSAGE ESCAPE See page 5–130. [ENTER] for more MESSAGE SIMULATION ESCAPE See page 5–131. [ENTER] for more MESSAGE GE Multilin 750/760 Feeder Management Relay Courtesy of NationalSwitchgear.com...
Page 68: Setpoint Entry Methods
Any of these methods can be used to enter the same information. A computer, however, makes entry much easier. Files can be stored and downloaded for fast, error free entry when a computer is used. To facilitate this process, a GE Multilin Products CD with the 750/760PC software is supplied with the relay.
Page 69 PHASES REQUIRED FOR ANY OPERATION: phase parameters are beyond the pickup value. • "All Three", then n output is generated if all three phase parameters are PHASES REQUIRED FOR ANY OPERATION: beyond the pickup value. GE Multilin 750/760 Feeder Management Relay Courtesy of NationalSwitchgear.com...
Page 70: Logic Diagrams
Conditions are mutually exclusive, i.e., only one condition can be active at any point in time. • Conditions latch until another condition becomes active. • The output of an active condition is 1 or logic high. 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 71: S1 Relay Setup
If the passcode is correctly entered, entering new setpoints will be allowed. If no keys are pressed for longer than 30 minutes, setpoint access automatically becomes restricted. Removing the setpoint access jumper immediately restricts setpoint access. If passcode protection is active but the passcode is not known, contact GE Multilin with the value.
Page 72 FRONT PANEL RS232 BAUD RATE and PARITY: These setpoints select the baud rate and parity for front panel RS232 serial communications port. When upgrading the relay firmware, the baud rate should be set to 9600. 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 73 Enabling this setpoint will cause the cold start request to initialize only the DNP sub-module. When is "Disabled" is selected, a cold restart request causes loss of protection until the COLD START INHIBIT 750/760 reset completes. WARNING GE Multilin 750/760 Feeder Management Relay Courtesy of NationalSwitchgear.com...
Page 74: Clock
(e.g. Power Factor events in a capacitor bank switching scheme). For this reason, certain event types can be ‘filtered’ from the event recorder to save room for other events. The following setpoints describe the events that can be filtered. 5-10 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 75: Trace Memory
"2 × 2048", then there will be 512 samples (32 cycles) cap- is set to "25%" and the TION BUFFER ORGANIZATION tured before the trigger point. setpoints select specific event types to trigger new waveform captures TRIGGER ON <EventType> GE Multilin 750/760 Feeder Management Relay 5-11 Courtesy of NationalSwitchgear.com...
Page 76: Data Logger
For example, "4 x 1024" indi- TION cates that the last three triggers with 1024 data samples per channel can be stored in memory. Note that one buffer must 5-12 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 77: Front Panel
MESSAGE any setpoint or actual values page. The keystrokes must be entered in the above order. Any other variation of the key sequence will not permit the clearing of the maximum demand values. GE Multilin 750/760 Feeder Management Relay 5-13...
Page 78: Default Messages
Range: 0 to 30 messages DEFAULT MESSAGES ENTER 3 MESSAGES SELECTED ESCAPE [ENTER] for more 27 MESSAGES REMAIN Range: Displays the first selected default message GE MULTILIN ESCAPE MESSAGE 750 REV 5.00 Range: Displays the second selected default message 0 B: ESCAPE MESSAGE...
Page 79: Clear Data
The setpoint clears the autoreclose shot rate value and updates the RESET AR RATE DATA ARCING CURRENT LAST date. These two setpoints are applicable to the 760 only. RESET GE Multilin 750/760 Feeder Management Relay 5-15 Courtesy of NationalSwitchgear.com...
Page 80: S2 System Setup
= 66.4 V. • VT RATIO: Enter the VT primary to secondary turns ratio with this setpoint. For a 14400:120 VT, the entry would be "120:1" (since 14400 / 120 = 120.0). 5-16 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 81: Line Vt Sensing
Enter an estimated average cost in cents per kWh. Approximate energy cost will be determined by the relay, providing a value useful for budgeting purposes. GE Multilin 750/760 Feeder Management Relay 5-17...
Page 82: Flexcurves
6.50 16.5 2.20 4.20 7.00 17.0 2.30 4.30 7.50 17.5 2.40 4.40 8.00 18.0 2.50 4.50 8.50 18.5 2.60 4.60 9.00 19.0 2.70 4.70 9.50 19.5 2.80 4.80 10.0 20.0 5-18 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 83: S3 Logic Inputs
The state of Logic Input n (where n = 1 to 14) is determined by combining the state of Contact Input n with the state of Virtual Input n according to the setpoint; this is a limited form of programmable logic. INPUT n ASSERTED LOGIC GE Multilin 750/760 Feeder Management Relay 5-19 Courtesy of NationalSwitchgear.com...
Page 84 For Logic Inputs 15 through 20, this setpoint may be assigned the following values: VALUE LOGIC INPUT ASSERTED WHEN: Disabled Never Virtual On Virtual input is on Virtual Off Virtual input is off 5-20 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 85: Breaker Functions
When the breaker is determined to be disconnected, the breaker state is shown to be neither open nor closed. For further information regarding operation with only one auxiliary breaker contact, see Section 4.1.2: LED Status Indicators on page 4–2. GE Multilin 750/760 Feeder Management Relay 5-21...
Page 86: Control Functions
Form-C contact; and provide a contact multiplier for an external contact by operating multiple relays. The setpoints for User Input A are shown above; setpoints for User Inputs B through T are identical. 5-22 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 87: Block Functions
This data includes breaker operation and TRIP COUNTERS A3 MAINTENANCE ARCING CURRENT trip counters along with breaker arcing current. This input could be used during testing to prevent maintenance operations from being accumulated. GE Multilin 750/760 Feeder Management Relay 5-23 Courtesy of NationalSwitchgear.com...
Page 88: Block Overcurrent Functions
5-24 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 89: Transfer Functions
Source 1(2) is about to be lost. TRANSFORMER LOCKOUT SOURCE TRIP setpoint disables the transfer scheme. BLOCK TRANSFER GE Multilin 750/760 Feeder Management Relay 5-25 Courtesy of NationalSwitchgear.com...
Page 90: Reclose Functions (760 Only)
(real or simulated breaker) and presently in the prefault state. When the assigned input is asserted, the relay is forced into the fault state where the programmed ‘fault’ values are used. 5-26 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 91: S4 Output Relays
Upon being operated by any programmed feature, the relay output contacts change state and remain in the new state for a programmed time interval called the . The dwell timer is started when PULSED OUTPUT DWELL TIME the first feature causes operation of the output relay. GE Multilin 750/760 Feeder Management Relay 5-27 Courtesy of NationalSwitchgear.com...
Page 92: Trip Relay
This is for use in applications where the 52 contacts reporting breaker state to the 750/760 are faster than the 52 contacts that are responsible for interrupting coil current. Figure 5–1: OUTPUT RELAY 1 TRIP LOGIC 5-28 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 93: Close Relay
This is for use in applications where the 52 contacts reporting breaker state to the 750/760 are faster than the 52 contacts that are responsible for interrupting coil current. Figure 5–2: OUTPUT RELAY 2 CLOSE LOGIC GE Multilin 750/760 Feeder Management Relay 5-29...
Page 94: Auxiliary Relays
PULSED OUTPUT DWELL TIME RELAY 3 OUTPUT TYPE point determines the time interval that the pulsed contacts remain in the operated state. Figure 5–3: OUTPUT RELAYS 3 TO 7 AUXILIARY LOGIC 5-30 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 95: Self-Test Warning Relay
There are no user-programmable setpoints associated with the Self-Test Warning Relay (Output Relay 8). The logic for this relay is shown below: Figure 5–4: OUTPUT RELAY 8 SELF-TEST WARNING LOGIC GE Multilin 750/760 Feeder Management Relay 5-31 Courtesy of NationalSwitchgear.com...
Page 96: S5 Protection
> 1. Select the appropriate curve shape and multiplier, thus matching the appropriate curve with the protection requirements. The available curves are shown in the table below. Table 5–4: TOC CURVE SELECTIONS ANSI GE TYPE IAC OTHER Extremely Inverse Extremely Inverse...
Page 97 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 GE Multilin 750/760 Feeder Management Relay 5-33 Courtesy of NationalSwitchgear.com...
Page 98 0.668 0.526 0.451 0.404 0.371 0.346 0.327 0.311 0.80 2.446 1.423 0.890 0.702 0.602 0.538 0.494 0.461 0.435 0.415 1.00 3.058 1.778 1.113 0.877 0.752 0.673 0.618 0.576 0.544 0.518 5-34 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 99 T = trip time (seconds) M = multiplier setpoint I = input current = pickup current setpoint A to E = constants pickup Table 5–9: GE TYPE IAC INVERSE CURVE CONSTANTS IAC CURVE SHAPE IAC EXTREME INVERSE 0.0040 0.6379 0.6200 1.7872...
Page 100: Phase Current
ANSI Device 51P, with identical characteristics. These elements can be controlled by the phase directional element, providing operation for current flow in the permitted direction only. Voltage restrained operation which reduces the pickup level with reduced voltage is also available. 5-36 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 101 If voltage restraint is enabled, the adjusted pickup, calculated by adjusting the pickup value by the multi- plier, will not fall below 0.05 × CT, which is the lowest value for the PHASE TIME OC PICKUP NOTE Figure 5–6: PHASE TOC LOGIC (1 OF 2) GE Multilin 750/760 Feeder Management Relay 5-37 Courtesy of NationalSwitchgear.com...
Page 102 ANSI device 50P, all with identical characteristics. These elements can be controlled by the phase directional element, providing operation for current flow in the permitted direction only. 5-38 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 103 If directional control is selected, it will determine whether current flow in each phase is in the forward or reverse direction, as determined by the connection of the GE Multilin 750/760 Feeder Management Relay 5-39 Courtesy of NationalSwitchgear.com...
Page 104 The voltage memory remains valid for MIN POLARIZING VOLTAGE one second after the voltages have collapsed. Once the voltage memory has expired, after one second, the phase overcur- 5-40 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 105 When set to "Disabled", all phase overcurrent elements are be inhibited by directional control. This setpoint also determines the operation of phase overcurrent elements under directional control upon ‘Close Into Fault’ (CIF). GE Multilin 750/760 Feeder Management Relay 5-41...
Page 106: Neutral Current
Neutral overcurrent elements can be controlled by the neutral directional element allowing operation for faults in the permitted direction only. Also, the elements can be blocked individually or as a group by logic inputs. 5-42 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 107 Neutral Time Overcurrent elements 1 and 2 are programmed in this subgroup. They are two identical protection elements each equivalent to a single ANSI device 51N neutral time overcurrent relay. Figure 5–11: NEUTRAL TOC LOGIC GE Multilin 750/760 Feeder Management Relay 5-43...
Page 108 The Neutral Instantaneous Overcurrent elements 1 and 2 are programmed in this subgroup. They are two identical protec- tion elements each equivalent to a single ANSI device 50N neutral instantaneous overcurrent relay. Figure 5–12: NEUTRAL IOC LOGIC 5-44 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 109 Dual polarization provides maximum security and reliability. If the polarizing voltage magnitude is insufficient then current polarizing takes control. If the polarizing current magnitude is insufficient then the voltage polarizing takes control. If neither voltage nor current polarizing is possible then the direction defaults to forward. GE Multilin 750/760 Feeder Management Relay 5-45...
Page 110 2% of VT nominal voltage. For systems with high-resistance grounding or floating neutrals, this setpoint can be as high as 20%. The default value of "0.05 × VT" is appropriate for most solidly grounded systems. 5-46 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 111: Ground Current
Terminals G10 and H10. Ground overcurrent elements can be blocked individually or as a group by logic inputs. Ground overcurrent elements can be controlled by the ground directional element allowing operation for faults in the permitted direction only. GE Multilin 750/760 Feeder Management Relay 5-47...
Page 112 GND TIME OC 1 ESCAPE MESSAGE DIRECTION: Disabled The equivalent of a single ground time overcurrent relay, ANSI device 51G, is programmed in this subgroup. Figure 5–15: GROUND TOC LOGIC 5-48 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 113 Range: Disabled, Forward, Reverse GND INST OC 1 ESCAPE MESSAGE DIRECTION: Disabled The equivalent of a single ground instantaneous relay, ANSI device 50G, is programmed in this subgroup. Figure 5–16: GROUND IOC LOGIC GE Multilin 750/760 Feeder Management Relay 5-49 Courtesy of NationalSwitchgear.com...
Page 114 2% of VT nominal voltage. For systems with high-resistance grounding or floating neutrals, this setpoint can be as high as 20%. The default value of "0.05 x VT" is appropriate for most solidly grounded systems. 5-50 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 115: Sensitive Ground Current
Sensitive ground overcurrent elements can be controlled by the sensitive ground direc- tional element allowing operation for faults in the permitted direction only. Also, the elements can be blocked individually or as a group by logic inputs. GE Multilin 750/760 Feeder Management Relay 5-51...
Page 116 Range: Disabled, Forward, Reverse SENSTV GND TIME OC ESCAPE MESSAGE DIRECTION: Disabled The sensitive ground time overcurrent element, ANSI device 51SG is programmed in this subgroup. Figure 5–18: SENSITIVE GROUND TOC LOGIC 5-52 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 117 Range: Disabled, Forward, Reverse SENSTV GND INST OC ESCAPE MESSAGE DIRECTION: Disabled The sensitive ground instantaneous overcurrent element, ANSI device 50SG is programmed in this subgroup. Figure 5–19: SENSITIVE GROUND IOC LOGIC GE Multilin 750/760 Feeder Management Relay 5-53 Courtesy of NationalSwitchgear.com...
Page 118 2% of VT nominal voltage. For systems with high-resistance grounding or floating neutrals, this setpoint can be as high as 20%. The default value of "0.05 x VT" is appropriate for most solidly grounded systems. 5-54 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 119 2000 V. Refer to Restricted Earth Fault Inputs on page 3–10 for the con- nections required to use the 750/760 to perform Restricted Earth Fault protection. GE Multilin 750/760 Feeder Management Relay 5-55 Courtesy of NationalSwitchgear.com...
Page 120 X(%) = impedance of transformer = 7% = 0.07 2000 kVA The rated transformer current through wye windings is given as: --------------------------- - 2887 A (EQ 5.9) 3 400 V ⋅ 5-56 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 121 4353 V 150 V 2246 V – A non-linear resistor is recommended as the peak fault voltage is above relay voltage maximum of 2000 V. Figure 5–22: RESTRICTED EARTH FAULT LOGIC GE Multilin 750/760 Feeder Management Relay 5-57 Courtesy of NationalSwitchgear.com...
Page 122: Negative Sequence
NEG SEQ TIME OC ESCAPE MESSAGE MULTIPLIER: 1.00 Range: Instantaneous, Linear NEG SEQ TIME OC ESCAPE MESSAGE RESET: Instantaneous Range: Disabled, Forward, Reverse NEG SEQ TIME OC ESCAPE MESSAGE DIRECTION: Disabled 5-58 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 123 Range: Disabled, Forward, Reverse NEG SEQ INST OC ESCAPE MESSAGE DIRECTION: Disabled A instantaneous overcurrent element operating on the negative sequence component of current, ANSI device 46 is pro- grammed in this subgroup. GE Multilin 750/760 Feeder Management Relay 5-59 Courtesy of NationalSwitchgear.com...
Page 124 The operating current and polarizing voltage is shown in the following table. If the polarizing voltage drops below the value, the direction defaults to forward. MIN OPERATING VOLTAGE 5-60 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 125 For systems with high-resistance grounding or floating neutrals, this setpoint can be as high as 20%. The default value of "0.05 x VT" is appropriate for most solidly grounded systems. Figure 5–25: NEGATIVE SEQUENCE DIRECTIONAL LOGIC GE Multilin 750/760 Feeder Management Relay 5-61...
Page 126 Figure 5–26: NEGATIVE SEQUENCE VOLTAGE LOGIC 5-62 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 127: Voltage
= Pickup Level At 0% of pickup, the operating time equals the Undervoltage Delay setpoint. NOTE 20 30 80 90 100 110 % of V pickup Figure 5–27: INVERSE TIME UNDERVOLTAGE CURVES GE Multilin 750/760 Feeder Management Relay 5-63 Courtesy of NationalSwitchgear.com...
Page 128 The setpoints for Under- voltage 1 are shown above; Undervoltage 2 setpoints are identical. Figure 5–28: BUS UNDERVOLTAGE LOGIC 5-64 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 129 The set- points for the Undervoltage 3 element are shown above; the Undervoltage 4 setpoints are identical. Figure 5–29: LINE UNDERVOLTAGE LOGIC GE Multilin 750/760 Feeder Management Relay 5-65...
Page 130 The setpoints above are repeated for both Overvoltage 1 and Overvoltage 2. Figure 5–30: OVERVOLTAGE LOGIC 5-66 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 131 Use of a time delayed back-up or an alarm mode allow other protections an opportunity to isolate the faulted element first. Figure 5–31: NEUTRAL DISPLACEMENT LOGIC GE Multilin 750/760 Feeder Management Relay 5-67...
Page 132: Frequency
MIN OPERATING CURRENT: Enter the minimum value of current required on any phase to allow the underfrequency element to operate. This setpoint is used to prevent underfrequency tripping during periods of light load, when this action would have an insignificant effect on the system. 5-68 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 133 5 SETPOINTS 5.6 S5 PROTECTION Figure 5–32: UNDERFREQUENCY LOGIC GE Multilin 750/760 Feeder Management Relay 5-69 Courtesy of NationalSwitchgear.com...
Page 134 There is one frequency decay protection element, ANSI device 81D which can provide a faster response to system distur- bances than the underfrequency elements. See the previous section for descriptions of the MIN OPERATING CURRENT setpoints. MIN OPERATING VOLTAGE Figure 5–33: FREQUENCY DECAY LOGIC 5-70 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 135: Breaker Failure
It is strongly recommended that a margin of at least 1.5 NOTE power frequency cycles be added to the expected breaker time-to-trip for the BRKR FAILURE DELAY 1 BRKR FAIL- setpoints. URE DELAY 2 Figure 5–34: BREAKER FAILURE LOGIC GE Multilin 750/760 Feeder Management Relay 5-71 Courtesy of NationalSwitchgear.com...
Page 136: Reverse Power (If Enabled)
NOTE This element is optional and available from GE Multilin as Mod 008. To order, please contact the factory with the serial num- ber of the 750/760 relay. Refer to Appendix A.1.1: Reverse Power on page A–1 for the complete procedure for installing and verifying the Reverse Power element.
Page 137: S6 Monitoring
PICKUP: 1.10 x CT Range: 0 to 60000 s in steps of 1 PHASE CURRENT ESCAPE See 5.6.1: Overview on page 5–32 for details. MESSAGE DELAY: Figure 5–36: PHASE CURRENT LEVEL LOGIC GE Multilin 750/760 Feeder Management Relay 5-73 Courtesy of NationalSwitchgear.com...
Page 138 PICKUP: 1.00 x CT Range: 0 to 60000 s in steps of 1 NEUTRAL CURRENT ESCAPE See 5.6.1: Overview on page 5–32 for details. MESSAGE DELAY: Figure 5–37: NEUTRAL CURRENT LEVEL LOGIC 5-74 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 139: Power Factor
0. Power Factor 1 and 2 delay timers will only be allowed to time when the 30% threshold is exceeded on all phases and the power factor remains outside of the programmed pickup and dropout levels. In the same GE Multilin 750/760 Feeder Management Relay 5-75 Courtesy of NationalSwitchgear.com...
Page 140: Fault Locator
Zzero (INDUCTIVE) OF ESCAPE Ω MESSAGE FEEDER: 0.01 Range: Disabled, Enabled FAULT TYPE OUTPUT TO ESCAPE MESSAGE RELAYS 4-7: Disabled Range: Disabled, Enabled FAULT LOCATION AFTER ESCAPE MESSAGE TRIP: Disabled 5-76 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 141 The fault distance message will be removed when the active conditions are reset. This message only appears after the first Trip condition; any subsequent Trips will only update the fault distance value (if required). GE Multilin 750/760 Feeder Management Relay 5-77...
Page 142: Demand
Block Interval. The value is updated every minute and indicates the demand over the time interval just preceding the time of update. 5-78 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 143 This setpoint allows the user to approximately match the response of the relay to analog instruments. For the setpoint, enter the time period over which the current demand calculation is to be performed. TIME INTERVAL Figure 5–41: CURRENT DEMAND LOGIC GE Multilin 750/760 Feeder Management Relay 5-79 Courtesy of NationalSwitchgear.com...
Page 144 For the TIME INTERVAL setpoint, power quantities auto-range to show units appropriate to the power system size. REAL POWER DMND PICKUP Figure 5–42: REAL POWER DEMAND LOGIC 5-80 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 145 For TIME INTERVAL setpoint, the power quantities auto-range to show units appropriate to the power system REACTIVE PWR DMND PICKUP size. Figure 5–43: REACTIVE POWER DEMAND LOGIC GE Multilin 750/760 Feeder Management Relay 5-81 Courtesy of NationalSwitchgear.com...
Page 146 TIME INTERVAL For the setpoint, the power quantities auto-range to show units appropriate to the power sys- APPARENT PWR DMND PICKUP tem size. Figure 5–44: APPARENT POWER DEMAND LOGIC 5-82 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 147: Analog Input
"0" for . The relay then interprets 4 mA as representing 0°C. Inter- A/I MIN VALUE mediate values between the minimum and maximum are scaled linearly. GE Multilin 750/760 Feeder Management Relay 5-83 Courtesy of NationalSwitchgear.com...
Page 148 ANALOG THRESHLD 1 PICKUP TYPE programmed threshold. When set to “Over”, the Drop Out value is calculated shown in the equation above. 5-84 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 149 The rate of change is equal to the slope of this line which is a stable quantity not unduly affected by noise or fluctuations from the input. GE Multilin 750/760 Feeder Management Relay 5-85 Courtesy of NationalSwitchgear.com...
Page 150: Analog Outputs
Type A channel ranges extend from a minimum of 0 units. Type B channels range between definite boundaries. Type C channels include the direction of flow. The following diagram illustrates these charac- teristics. 5-86 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 151 0.0 to 6553.5 Mvarh 1000.0 Ground Current 0 to 65535 Amps 2000 Ground Current Angle 0 to 359° Lag Power and energy quantities auto-range to display units appropriate to power system size. GE Multilin 750/760 Feeder Management Relay 5-87 Courtesy of NationalSwitchgear.com...
Page 152: Overfrequency
Note that the system frequency will still be measured and displayed in if both the Overfrequency A2 METERING FREQ and Underfrequency functions are set to "Disabled". 5-88 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 153: Equipment
Range: 1 to 10000 Trips in steps of 1 TRIP COUNTER ESCAPE MESSAGE LIMIT: 10000 Trips When the total number of trips detected reaches the setpoint, an output will occur. TRIP COUNTER LIMIT GE Multilin 750/760 Feeder Management Relay 5-89 Courtesy of NationalSwitchgear.com...
Page 154 An output will occur when the total arcing current in any phase reaches this setpoint. Note that the total arcing current for each phase will still be available for display under A3 MAINTENANCE ARCING CUR- if the set to "Disabled". RENT ARCING CURRENT FUNCTION 5-90 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 155 Part Total Area = Breaker Arcing Current (kA x cycle) Programmable 100 ms Start Delay Start Stop Integration Integration ARCING.CDR Figure 5–51: ARCING CURRENT MEASUREMENT Figure 5–52: ARCING CURRENT LOGIC GE Multilin 750/760 Feeder Management Relay 5-91 Courtesy of NationalSwitchgear.com...
Page 156 A Breaker Operation failure condition results if the breaker does not respond within the time. This BRKR OPERATION DELAY time is a characteristic of the breaker being used. Figure 5–53: BREAKER OPERATION LOGIC 5-92 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 157 “Enabled”. Generally, this selection will require a wiring modification of the breaker, as BRKR STATE BYPASS detailed in Section 3.2.6: Trip/Close Coil Supervision on page 3–12. Figure 5–54: COIL MONITOR LOGIC GE Multilin 750/760 Feeder Management Relay 5-93 Courtesy of NationalSwitchgear.com...
Page 158 VT fuses have been pulled or the VTs have been racked out. Figure 5–55: VT FAILURE LOGIC 5-94 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 159: Pulse Output
This feature should be programmed such that no more than one pulse per two seconds will be required or the pulsing will lag behind the interval activation. Figure 5–56: PULSED OUTPUT LOGIC GE Multilin 750/760 Feeder Management Relay 5-95...
Page 160: S7 Control
Each setpoint group includes the selection of Auxiliary Output Relays 3 to 7 that can be operated by the protection features. As these relays are hard-wired to external equipment, the selection should only be changed from that in setpoint Group 1 with considerable care. CAUTION 5-96 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 161 5 SETPOINTS 5.8 S7 CONTROL Figure 5–57: SETPOINT CONTROL (1 OF 3) Figure 5–58: SETPOINT CONTROL (2 OF 3) GE Multilin 750/760 Feeder Management Relay 5-97 Courtesy of NationalSwitchgear.com...
Page 162 5.8 S7 CONTROL 5 SETPOINTS Figure 5–59: SETPOINT CONTROL (3 OF 3) 5-98 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 163: Synchrocheck
DEAD LINE MAX VOLTAGE or line VT input nominal voltage. If the bus or line voltage falls below these values, the single bus/line voltage input used for synchrocheck will be considered "Dead", or de-energized. GE Multilin 750/760 Feeder Management Relay 5-99...
Page 164 ENCE MAX ANGLE DIFFERENCE MAX FREQ DIFFERENCE quency differential on the two input voltages below the values entered here is within the permissible limit for synchronism. Figure 5–60: SYNCHROCHECK LOGIC 5-100 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 165: Manual Close Blocking
The 750/760 can be programmed to block instantaneous overcurrent elements and raise the pickup level of time overcur- rent elements when a manual breaker close is performed. This prevents optimally set overcurrent elements from errone- ously operating on startup due to inrush currents. GE Multilin 750/760 Feeder Management Relay 5-101...
Page 166 5.8 S7 CONTROL 5 SETPOINTS Figure 5–61: MANUAL CLOSE BLOCKING LOGIC 5-102 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 167: Cold Load Pickup Blocking
‘Cold Load Pickup’. Overcurrent settings are returned to nor- mal after any phase current is restored to greater than 10% of nominal and then a timer of duration equal to COLD LOAD expires. PICKUP BLOCK TIME GE Multilin 750/760 Feeder Management Relay 5-103 Courtesy of NationalSwitchgear.com...
Page 168 5.8 S7 CONTROL 5 SETPOINTS NORMAL TRIP SETTING PICKUP PICKUP OUTAGE Time (seconds) LOAD ENERGIZED Figure 5–62: COLD LOAD PICKUP Figure 5–63: COLD LOAD PICKUP LOGIC 5-104 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 169: Undervoltage Restoration
It is recommended that if automatic undervoltage restoration is to be used, that the cold load pickup feature is also enabled, to prevent the breaker from tripping shortly after it is automatically closed. Figure 5–64: UNDERVOLTAGE RESTORATION LOGIC GE Multilin 750/760 Feeder Management Relay 5-105...
Page 170: Underfrequency Restoration
It is recommended that if automatic underfrequency restora- tion is to be used, that the cold load pickup feature is also enabled, to prevent the breaker from tripping shortly after it is automatically closed. 5-106 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 171: Transfer
To protect against damage to motors connected to the dead bus, the bus tie breaker is not allowed to close, after a transfer has been initiated, until the decaying (residual) voltage on the bus has been reduced to a safe level. GE Multilin 750/760 Feeder Management Relay 5-107 Courtesy of NationalSwitchgear.com...
Page 172 An overcurrent condition on Bus 1 is detected by Devices 50P-1 or 2 or 50N-1 or 2, to prevent a faulted bus from being transferred to a healthy source. • The line definite time Undervoltage element (Device 27-3) on Source 2 is operated, indicating low voltage on the other source. 5-108 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 173 Control or Alarm. It is imperative that the setpoint be either "DL|DB" (Dead Line or Dead DEAD SOURCE PERMISSIVE Bus) or "DLXDB" (Dead Line or Dead Bus, but not both) to allow for transfers to either incomer. GE Multilin 750/760 Feeder Management Relay 5-109 Courtesy of NationalSwitchgear.com...
Page 174 Asserted Logic: Contact Open Asserted Logic: Contact Open Contact Close Contact Close Name: Source Trip Name: Source Trip Asserted Logic: Contact Open Asserted Logic: Contact Open (optional) Contact Close Contact Close 5-110 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 175 5 SETPOINTS 5.8 S7 CONTROL Figure 5–66: TRANSFER SCHEME ONE LINE DIAGRAM GE Multilin 750/760 Feeder Management Relay 5-111 Courtesy of NationalSwitchgear.com...
Page 176 5.8 S7 CONTROL 5 SETPOINTS Figure 5–67: TRANSFER SCHEME INCOMER NO. 1 DC SCHEMATIC 5-112 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 177 5 SETPOINTS 5.8 S7 CONTROL Figure 5–68: TRANSFER SCHEME INCOMER NO. 2 DC SCHEMATIC GE Multilin 750/760 Feeder Management Relay 5-113 Courtesy of NationalSwitchgear.com...
Page 178 5.8 S7 CONTROL 5 SETPOINTS Figure 5–69: TRANSFER SCHEME BUS TIE BREAKER DC SCHEMATIC 5-114 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 179 5 SETPOINTS 5.8 S7 CONTROL Figure 5–70: TRANSFER SCHEME INCOMER NO. 1 LOGIC GE Multilin 750/760 Feeder Management Relay 5-115 Courtesy of NationalSwitchgear.com...
Page 180 5.8 S7 CONTROL 5 SETPOINTS Figure 5–71: TRANSFER SCHEME INCOMER NO. 2 LOGIC 5-116 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 181 5 SETPOINTS 5.8 S7 CONTROL Figure 5–72: TRANSFER SCHEME BUS TIE BREAKER LOGIC GE Multilin 750/760 Feeder Management Relay 5-117 Courtesy of NationalSwitchgear.com...
Page 182: Autoreclose (760 Only)
Reclosure 1 setpoint, the shot counter is incremented and a breaker closure is initiated using the ‘2 Close’ output con- SURE tact. At the same time, overcurrent element characteristics are modified according to the Reclosure 1 setpoints. 5-118 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 183 ‘reclaim time’ in a traditional scheme with fixed protection settings. This time must be set to a value greater than the sum of all programmed dead times plus the maximum time to trip on each reclose shot. GE Multilin 750/760 Feeder Management Relay 5-119 Courtesy of NationalSwitchgear.com...
Page 184 This indicator is on when the autoreclose scheme has progressed to a lockout condition, such that no fur- ther breaker closures will be initiated until the 760 has been reset. 5-120 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 185 5 SETPOINTS 5.8 S7 CONTROL Figure 5–73: AUTORECLOSE SCHEME SETUP LOGIC GE Multilin 750/760 Feeder Management Relay 5-121 Courtesy of NationalSwitchgear.com...
Page 186 ABOVE: 19.00 x CT Range: Enabled, Disabled CURRENT SUPERVISION ESCAPE MESSAGE TO LOCKOUT: Disabled Range: 0.00 to 20.00 x CT in steps of 0.01 LOCKOUT FOR CURRENT ESCAPE MESSAGE ABOVE: 20.00 x CT 5-122 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 187 The fault current level above which the number of autoreclosure shots will be reduced to one, two, or three shots can be selected. If the autoreclose scheme is to be taken directly to lockout without reclosing, set the CURRENT SUPERVISION TO setpoint to "Enabled" LOCKOUT Figure 5–75: AUTORECLOSE CURRENT SUPERVISION LOGIC GE Multilin 750/760 Feeder Management Relay 5-123 Courtesy of NationalSwitchgear.com...
Page 188 In addition, the autoreclose reset timer must be set longer than the maximum time for the recloser to reach lockout. NOTE 5-124 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 189 5 SETPOINTS 5.8 S7 CONTROL Figure 5–76: AUTORECLOSE ZONE COORDINATION LOGIC GE Multilin 750/760 Feeder Management Relay 5-125 Courtesy of NationalSwitchgear.com...
Page 190 Selections for shots, that are greater than the maximum number of shots programmed in the scheme setup, will not be used by the scheme. 5-126 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 191 5 SETPOINTS 5.8 S7 CONTROL Figure 5–77: AUTORECLOSURE SHOTS 1 TO 4 LOGIC GE Multilin 750/760 Feeder Management Relay 5-127 Courtesy of NationalSwitchgear.com...
Page 192 10. If the shot counter has not reached its maximum allowed value then the cycle begins at step 6 using protection set- points for the current shot. 11. If the shot counter has reached its maximum then the scheme goes to lockout. 5-128 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 193: S8 Testing
Select "De-energized" for the remaining setpoints to force the output relays to the de-energized state while FORCE OUTPUT is set to "Enabled". Selecting "Energized" forces the output relay to the energized state while the RELAYS FUNCTION FORCE setpoint is "Enabled". OUTPUT RELAYS FUNCTION GE Multilin 750/760 Feeder Management Relay 5-129 Courtesy of NationalSwitchgear.com...
Page 194: Pickup Test
For example, if the relay has been ordered with 4 to 20 mA analog outputs, setting this value to FORCE A/O 1(8) "100%" will output 20 mA, "0%" will output 4 mA, and "50%" will output 12 mA. 5-130 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 195: Simulation
Logic inputs, except for the 52a and 52b contacts, are monitored normally throughout the simulation. The relay’s simulation of a circuit breaker is indicated by the status of the Breaker Open and Breaker Closed front panel indicators. GE Multilin 750/760 Feeder Management Relay 5-131...
Page 196 Note that the default value blocks the operation of all output relays. For timing tests, a selected output relay can be set to be operational, to provide a signal to stop a timer. 5-132 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 197 Range: 0.00 to 20.00 x CT in steps of 0.01 POLARIZING CURRENT ESCAPE MESSAGE LEVEL: 1.00 x CT Range: 0 to 359° Lag in steps of 1 POLARIZING CURRENT ESCAPE MESSAGE POSITION: 0° Lag GE Multilin 750/760 Feeder Management Relay 5-133 Courtesy of NationalSwitchgear.com...
Page 198: Factory Service
All phasor angles are referenced to the prefault A-N bus voltage at 0°. 5.9.5 FACTORY SERVICE PATH: SETPOINTS S8 TESTING FACTORY SERVICE ð Range: Restricted access for GE personnel only FACTORY SERVICE ENTER FACTORY ENTER ESCAPE [ENTER] for more PASSCODE: These messages are intended for factory use only, to perform testing and diagnostics.
Page 199: Actual Values
[ENTER] for more MESSAGE ESCAPE MESSAGE ð ACTUAL VALUES TRIP COUNTERS ENTER See page 6–15. A3 MAINTENANCE ESCAPE [ENTER] for more ARCING CURRENT ESCAPE See page 6–15. MESSAGE [ENTER] for more GE Multilin 750/760 Feeder Management Relay Courtesy of NationalSwitchgear.com...
Page 200 REV CODES ESCAPE See page 6–19. [ENTER] for more MESSAGE CAL DATES ESCAPE See page 6–19. MESSAGE [ENTER] for more The following two figures show block diagrams from the Actual Values messages. 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 201 6 ACTUAL VALUES 6.1 OVERVIEW Figure 6–1: ACTUAL VALUES BLOCK DIAGRAM (1 GE Multilin 750/760 Feeder Management Relay Courtesy of NationalSwitchgear.com...
Page 202 6.1 OVERVIEW 6 ACTUAL VALUES Figure 6–2: ACTUAL VALUES BLOCK DIAGRAM (2 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 203: A1 Status
These messages display the state of all hardware inputs. The top line in the last two values above reflect the names pro- grammed in the setpoints, S6 MONITORING EQUIPMENT COIL 1 MON COIL 1 MON NAME COIL 2 MON NAME respectively. GE Multilin 750/760 Feeder Management Relay Courtesy of NationalSwitchgear.com...
Page 204: Last Trip Data
Phase and Neutral Instantaneous Overcurrent 1 elements) then only the first trip event detected by the relay will have Last Trip Data captured. This information cannot be cleared; data for a new trip overwrites the previous trip data. 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 205: Fault Locations
AR SHOT RATE RESET AR command via the front panel or communications. RATE DATA value shows the total number of reclosures since the date. AR SHOT COUNT AR SHOT COUNT LAST RESET GE Multilin 750/760 Feeder Management Relay Courtesy of NationalSwitchgear.com...
Page 206: A2 Metering
- Var PF=Lag PF=Lead Bus Voltage E S4=E + Watt - Watt + Var + Var PF=Lag PF=Lead = Angle By Which Voltage Leads Current 818773AC.CDR Figure 6–3: POWER QUANTITY RELATIONSHIPS 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 207: Current
RMS phasor as given by: NEG SEQ CURRENT ----------------------------------- for ABC phase sequence; I ----------------------------------- for ACB phase sequence (EQ 6.4) displays the calculated zero-sequence current RMS phasor: ------------------------ - (EQ 6.5) ZERO SEQ CURRENT GE Multilin 750/760 Feeder Management Relay Courtesy of NationalSwitchgear.com...
Page 208 ) 3 ⁄ for ABC phase sequence; V ) 3 ⁄ for ACB phase sequence (EQ 6.9) value shows the calculated zero-sequence current RMS phasor: ) 3 ⁄ ZERO SEQ VOLTAGE (EQ 6.10) 6-10 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 209: Synchronizing Voltage
ΦA APPARENT PWR: Range: 0 to 30000 kVA. See the Power Quantities table ESCAPE below for further explanation. MESSAGE 0.0 kVA ΦA PWR FACTOR: Range: –0.99 to 1.00 ESCAPE MESSAGE 0.00 GE Multilin 750/760 Feeder Management Relay 6-11 Courtesy of NationalSwitchgear.com...
Page 210: Energy
Power quantities in the positive direction are added to the positive values; power quantities in the opposite direction are added to the negative values. The 750/760 is not a revenue class meter and cannot be used for billing purposes. NOTE 6-12 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 211 [ENTER] for more RESET: Mar 16 1997 This message displays the last date the maximum demand data was cleared. If the date has never been programmed, this relay will display "Unavailable". GE Multilin 750/760 Feeder Management Relay 6-13 Courtesy of NationalSwitchgear.com...
Page 212: Analog Input
"µA". MONITORING A/I SETUP A/I UNITS The subsequent actual value messages display the analog input rate of change in per minutes and per hour. 6-14 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 213: A3 Maintenance
The relay calculates an estimate of the per-phase wear on the breaker contacts. Arcing current data can be reset to zero with the setpoint command. S1 RELAY SETUP INSTALLATION RESET ARCING CURRENT DATA GE Multilin 750/760 Feeder Management Relay 6-15 Courtesy of NationalSwitchgear.com...
Page 214: A4 Event Recorder
Each event is assigned an event number equal to the number of events that have occurred since the recorder was cleared; the event number is incremented for each new event. Event recorder data can be cleared with the setpoint. RELAY SETUP CLEAR DATA CLEAR EVENT RECORDER DATA 6-16 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 215 These are events that occur when a self-test warning is detected or one of the SELF-TEST WARNING: Events manual testing The event causes are listed alphabetically by type of event in the following table. GE Multilin 750/760 Feeder Management Relay 6-17 Courtesy of NationalSwitchgear.com...
Page 216 EVENT RECORDER LAST ENTER ESCAPE [ENTER] for more RESET: Mar 16 1997 After the header message for the last event is a message indicating when the event recorder was last cleared. 6-18 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 217: A5 Product Info
DATE: Oct 25 1997 Displays the last calibration date in the format shown. LAST CAL ESCAPE MESSAGE DATE: Oct 25 1997 This information is primarily intended for GE Multilin service personnel. GE Multilin 750/760 Feeder Management Relay 6-19 Courtesy of NationalSwitchgear.com...
Page 218 6.6 A5 PRODUCT INFO 6 ACTUAL VALUES 6-20 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 219: Communications
7 COMMUNICATIONS 7.1OVERVIEW 7.1.1 PROTOCOLS The GE Multilin 750/760 Feeder Management Relay communicates with other computerized equipment such as program- mable logic controllers, personal computers, or plant master computers using either the AEG Modicon Modbus protocol or the Harris Distributed Network Protocol (DNP), Version 3.0. Following are some general notes: •...
Page 220: Modbus Protocol
(CRC-16) with every packet which is an industry standard method used for error detection. If a GE Multilin Modbus slave device receives a packet in which an error is indicated by the CRC, the slave device will not act upon or respond to the packet thus preventing any erroneous operations.
Page 221: Algorithm
No: go to 3. Yes: continue. A --> CRC GE Multilin will provide a C programming language implementation of this algorithm upon request. NOTE 7.2.4 MESSAGE TIMING Communication message synchronization is maintained by timing constraints. The receiving device must measure the time between the reception of characters.
Page 222: Modbus Operations
Modbus officially defines function codes from 1 to 127 though only a small subset is generally needed. The 750/760 relays support some of these functions, as summarized in the following table. Subsequent sections describe each function code in detail. Table 7–1: GE MULTILIN MODBUS FUNCTION CODES FUNCTION CODE DEFINITION DESCRIPTION...
Page 223 OPERATION CODE: high order byte, low order byte 00 01 remote reset CODE VALUE: high order byte, low order byte FF 00 perform operation CRC: low order byte, high order byte DF 6A computed cyclic redundancy check code GE Multilin 750/760 Feeder Management Relay Courtesy of NationalSwitchgear.com...
Page 224 1100 DATA: high order byte, low order byte 00 C8 data for address 1100 = 00C8 CRC: low order byte, high order byte 8F F0 CRC computed by slave 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 225: Exception Responses
Programming or operation errors happen because of illegal data in a packet, hardware or software problems in the slave device, etc. These errors result in an exception response from the slave. The GE Multilin 750/760 implements the error codes listed below. The slave detecting one of these errors sends a response packet to the master with the high order bit of the function code set to 1.
Page 226: Clock Synchronization Of Multiple Relays
An external device connected to the addressed slave device has failed and the data DEVICE requested cannot be sent. This response will be returned if a GE Multilin device connected to the RS485 external device port of the 745 has failed to respond to the 750/760.
Page 227: Reading The Event Recorder
3501h A-C Phase Time Overcurrent 1 Trip 8501h A-C Phase Time Overcurrent 1 Dropout 4212h B Overvoltage 1 Alarm 6514h User Input A Asserted via Contact Input 7009h Clock Not Set GE Multilin 750/760 Feeder Management Relay Courtesy of NationalSwitchgear.com...
Page 228: Reading Trace Memory
Read the setpoint TRACE MEMORY BUFFER ORGANIZATION Write a value of 4 to the Trace Memory Number Selector. Read all the Trace Memory Information registers and store to SCADA memory. 7-10 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 229: Reading The Data Logger
The following table shows the register addresses to store in the User Map Addresses #1 to #6 so that several different data registers can be read in one continuous block from User Map Value #1 to #6. Reading the User Map Values is done via function code 03h or 04h. GE Multilin 750/760 Feeder Management Relay 7-11...
Page 230: Memory Map Organization
Event Recorder, Trace 2000h to 2FFFh See relevant sections in this chapter for details. Memory, Data Logger Reserved 3000h to 3FFFh Reserved for future use. Factory Service Data 4000h to FFFFh Reserved. 7-12 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 231: Modbus Memory Map
Table 7–6: MODBUS MEMORY MAP (SHEET 1 OF 27) ADDR DESCRIPTION RANGE UNITS TYPE DEFAULT PRODUCT ID READ ONLY 0000 GE Multilin Product Device Code 0001 Hardware Revision 1 to 26 0002 Software Revision 0003 Version Number 000 to 999 0004...
Page 232 Average Phase Voltage 0.00 to 600.00 1 2 3 4 5 6 7 8 9 For explanation of Table footnotes, see the Memory Map Notes at the end of this table. 7-14 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 233 φA Real Power 0360 -30000 to 30000 1 2 3 4 5 6 7 8 9 For explanation of Table footnotes, see the Memory Map Notes at the end of this table. GE Multilin 750/760 Feeder Management Relay 7-15 Courtesy of NationalSwitchgear.com...
Page 234 Distance to Fault -327.68 to 327.67 1 2 3 4 5 6 7 8 9 For explanation of Table footnotes, see the Memory Map Notes at the end of this table. 7-16 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 235 Neutral Voltage Angle 0 to 359 1 2 3 4 5 6 7 8 9 For explanation of Table footnotes, see the Memory Map Notes at the end of this table. GE Multilin 750/760 Feeder Management Relay 7-17 Courtesy of NationalSwitchgear.com...
Page 236 Arcing Current 0626 VT Failure 1 2 3 4 5 6 7 8 9 For explanation of Table footnotes, see the Memory Map Notes at the end of this table. 7-18 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 237 Set Date (2 words) 01/01/1993 1 2 3 4 5 6 7 8 9 For explanation of Table footnotes, see the Memory Map Notes at the end of this table. GE Multilin 750/760 Feeder Management Relay 7-19 Courtesy of NationalSwitchgear.com...
Page 238 Pickup & Trip 10E5 Channel 1 Source 1 2 3 4 5 6 7 8 9 For explanation of Table footnotes, see the Memory Map Notes at the end of this table. 7-20 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 239 1176 Setpoint Group 3 Disabled 1 2 3 4 5 6 7 8 9 For explanation of Table footnotes, see the Memory Map Notes at the end of this table. GE Multilin 750/760 Feeder Management Relay 7-21 Courtesy of NationalSwitchgear.com...
Page 240 Disabled 1242 Block Reset Disabled 1 2 3 4 5 6 7 8 9 For explanation of Table footnotes, see the Memory Map Notes at the end of this table. 7-22 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 241 12A2 Trigger Data Logger Disabled 1 2 3 4 5 6 7 8 9 For explanation of Table footnotes, see the Memory Map Notes at the end of this table. GE Multilin 750/760 Feeder Management Relay 7-23 Courtesy of NationalSwitchgear.com...
Page 242 User Input L Relays None 1 2 3 4 5 6 7 8 9 For explanation of Table footnotes, see the Memory Map Notes at the end of this table. 7-24 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 243 0 to 65535 0 ms 1 2 3 4 5 6 7 8 9 For explanation of Table footnotes, see the Memory Map Notes at the end of this table. GE Multilin 750/760 Feeder Management Relay 7-25 Courtesy of NationalSwitchgear.com...
Page 244 0 to 65535 0 ms 1 2 3 4 5 6 7 8 9 For explanation of Table footnotes, see the Memory Map Notes at the end of this table. 7-26 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 245 VT 0.05 x VT 1 2 3 4 5 6 7 8 9 For explanation of Table footnotes, see the Memory Map Notes at the end of this table. GE Multilin 750/760 Feeder Management Relay 7-27 Courtesy of NationalSwitchgear.com...
Page 246 Neutral Time Overcurrent 2 Function Disabled 1 2 3 4 5 6 7 8 9 For explanation of Table footnotes, see the Memory Map Notes at the end of this table. 7-28 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 247 0 to 359 ° 315° 1 2 3 4 5 6 7 8 9 For explanation of Table footnotes, see the Memory Map Notes at the end of this table. GE Multilin 750/760 Feeder Management Relay 7-29 Courtesy of NationalSwitchgear.com...
Page 248 20.00 to 65.00 58.00 Hz 1 2 3 4 5 6 7 8 9 For explanation of Table footnotes, see the Memory Map Notes at the end of this table. 7-30 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 249 0 to 60,000 50 s 1 2 3 4 5 6 7 8 9 For explanation of Table footnotes, see the Memory Map Notes at the end of this table. GE Multilin 750/760 Feeder Management Relay 7-31 Courtesy of NationalSwitchgear.com...
Page 250 0 to 6553.5 Mvarh 100 Mvarh 1 2 3 4 5 6 7 8 9 For explanation of Table footnotes, see the Memory Map Notes at the end of this table. 7-32 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 251 18D6 Analog Output 6 Maximum 1 2 3 4 5 6 7 8 9 For explanation of Table footnotes, see the Memory Map Notes at the end of this table. GE Multilin 750/760 Feeder Management Relay 7-33 Courtesy of NationalSwitchgear.com...
Page 252 CT 0.100 x CT 1 2 3 4 5 6 7 8 9 For explanation of Table footnotes, see the Memory Map Notes at the end of this table. 7-34 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 253 Force Analog Output 5 0 to 100 1 2 3 4 5 6 7 8 9 For explanation of Table footnotes, see the Memory Map Notes at the end of this table. GE Multilin 750/760 Feeder Management Relay 7-35 Courtesy of NationalSwitchgear.com...
Page 254 VT 0.90 x V 1 2 3 4 5 6 7 8 9 For explanation of Table footnotes, see the Memory Map Notes at the end of this table. 7-36 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 255 Select Setpoint Group Active Group 1 2 3 4 5 6 7 8 9 For explanation of Table footnotes, see the Memory Map Notes at the end of this table. GE Multilin 750/760 Feeder Management Relay 7-37 Courtesy of NationalSwitchgear.com...
Page 256 Record #N B-N (C-B) Voltage Angle 0 to 359 1 2 3 4 5 6 7 8 9 For explanation of Table footnotes, see the Memory Map Notes at the end of this table. 7-38 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 257 7 These registers are new or have changed for version 3.40 MOD 010 8 These registers are new or have changed for version 3.60 9 These registers are new or have changed for version 3.70 GE Multilin 750/760 Feeder Management Relay 7-39...
Page 258: Data Formats
1 2 3 4 5 6 7 8 9 For explanation of footnotes, see notes of end of Table. 1 2 3 4 5 6 7 8 9 For explanation of footnotes, see notes of end of Table. 7-40 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 259 1 2 3 4 5 6 7 8 9 For explanation of footnotes, see notes of end of Table. 1 2 3 4 5 6 7 8 9 For explanation of footnotes, see notes of end of Table. GE Multilin 750/760 Feeder Management Relay 7-41 Courtesy of NationalSwitchgear.com...
Page 260 1 2 3 4 5 6 7 8 9 For explanation of footnotes, see notes of end of Table. 1 2 3 4 5 6 7 8 9 For explanation of footnotes, see notes of end of Table. 7-42 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 261 1 2 3 4 5 6 7 8 9 For explanation of footnotes, see notes of end of Table. 1 2 3 4 5 6 7 8 9 For explanation of footnotes, see notes of end of Table. GE Multilin 750/760 Feeder Management Relay 7-43 Courtesy of NationalSwitchgear.com...
Page 262 1 2 3 4 5 6 7 8 9 For explanation of footnotes, see notes of end of Table. 1 2 3 4 5 6 7 8 9 For explanation of footnotes, see notes of end of Table. 7-44 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 263 1 2 3 4 5 6 7 8 9 For explanation of footnotes, see notes of end of Table. 1 2 3 4 5 6 7 8 9 For explanation of footnotes, see notes of end of Table. GE Multilin 750/760 Feeder Management Relay 7-45 Courtesy of NationalSwitchgear.com...
Page 264 1 2 3 4 5 6 7 8 9 For explanation of footnotes, see notes of end of Table. 1 2 3 4 5 6 7 8 9 For explanation of footnotes, see notes of end of Table. 7-46 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 265 1 2 3 4 5 6 7 8 9 For explanation of footnotes, see notes of end of Table. Over Under 1 2 3 4 5 6 7 8 9 For explanation of footnotes, see notes of end of Table. GE Multilin 750/760 Feeder Management Relay 7-47 Courtesy of NationalSwitchgear.com...
Page 266 6 New for version 3.31 MOD 010 7 New or have changed for version 3.60 8 New or have changed for version 3.70 9 New or have changed for version 4.00 7-48 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 267: Dnp Communications
Data Link Confirm None Fixed Variable Configurable (Note 1) Complete Appl. Fragment None Fixed Variable Configurable Application Confirm None Fixed Variable Configurable Complete Appl. Response None Fixed Variable Configurable Others: (None) GE Multilin 750/760 Feeder Management Relay 7-49 Courtesy of NationalSwitchgear.com...
Page 268 Sends Multi-Fragment Responses: Table Notes: The data link layer confirmation mode, confirmation time-out, and number of retries are all configurable. Refer to DNP Configuration on page 5–9 for more details. 7-50 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 269: Dnp Implementation
The point tables for Binary Input and Analog Input objects contain a field which defines to which event class the corre- sponding static data has been assigned. For this object, the qualifier code must specify an index of 7 only. GE Multilin 750/760 Feeder Management Relay 7-51...
Page 270: Dnp Point Lists
Any detected change in the state of any point will cause the generation of an event object. An event object will be generated as a result of any change in any point. 7-52 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 271 A Status of “Control Operation not Supported for this Point” (4) will be returned if an attempt was made to operate the “Open Breaker” (1), “Close Breaker” (2) or “Breaker Control” (23) points and the relay is in local mode (this sta- tus is indicated by Object 1, Point 14). GE Multilin 750/760 Feeder Management Relay 7-53...
Page 272 Power Factor 1 Class 1 Power Factor 2 Class 1 Synchrocheck Block (Not In Sync) Class 1 Current Demand Class 1 Real Power Demand Class 1 Reactive Power Demand Class 1 7-54 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 273 Note 3 Phase C-Phase A RMS Voltage Class 2 Note 3 Sensitive Ground Current Class 2 Note 3 Average Current Class 2 Note 3 Average Line Voltage Class 2 Note 3 GE Multilin 750/760 Feeder Management Relay 7-55 Courtesy of NationalSwitchgear.com...
Page 274 Time Of Fault 3 (Lower 16 Bits - See Note 1) Note 1 Type Of Fault 3 Distance To Fault 3 Line Z1 To Fault 3 (Magnitude) Date Of Fault 4 (Upper 16 Bits - See Note 1) Note 1 7-56 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 275 Time Of Fault 10 (Upper 16 Bits - See Note 1) Note 1 Time Of Fault 10 (Lower 16 Bits - See Note 1) Note 1 Type Of Fault 10 GE Multilin 750/760 Feeder Management Relay 7-57 Courtesy of NationalSwitchgear.com...
Page 276 Modbus). Refer to Section 7.3.7: Accessing Data via the User Map on page 7–11 for more informa- tion. Please note that changes in User Map Values never generate event objects. 7-58 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 277: Commissioning Tests
We also recommend that the procedures outlined in Section 8.7: Placing the Relay In Service on page 8–56 be performed for all installations to verify proper operation and function of the equipment. GE Multilin 750/760 Feeder Management Relay Courtesy of NationalSwitchgear.com...
Page 278: Conventions
Check that the installed relay agrees with the drawings, particularly the Analog Output range. Check that the external wiring is correct. Check that all grounding terminals of the relay are properly connected to the ground bus. 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 279: Wiring Diagrams
φ 3 VARIABLE SOURCE 3 ALARM Ω ± ± ± MULTIMETER ± 750/760 ± ± POWER MULTIMETER ANALOG INPUT VARIABLE DCmA SOURCE 818777A5.CDR Figure 8–2: RELAY TEST WIRING – DELTA CONNECTION GE Multilin 750/760 Feeder Management Relay Courtesy of NationalSwitchgear.com...
Page 280: Inputs/Outputs
Set the monitored virtual input for the logic input programmed in setpoint message to the USER INPUT A SOURCE on state. Note that the corresponding contact input will have no affect. 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 281 Repeat steps 8.3 through 8.7 for all functions programmed to be asserted by a Closed & Voff input. setpoints set to "Open & Von": INPUT ASSERTED LOGIC 9.1. Check that there is no logic input diagnostic message on the display. GE Multilin 750/760 Feeder Management Relay Courtesy of NationalSwitchgear.com...
Page 282 12.3. Leave the monitored contact in the closed state and put the virtual input in the off state. Check that the diagnos- tic message, the Auxiliary LED and relay remain activated. 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 283 16.2. Set the monitored contact for the logic input programmed in setpoint message User Input A Source to the closed state and the virtual input to the on state. Check that the diagnostic message, either User Input A or the GE Multilin 750/760 Feeder Management Relay...
Page 284: Virtual Inputs 15 To 20
Trip LED. 8.2.2 VIRTUAL INPUTS 15 TO 20 Follow the Virtual On and Virtual Off Input Asserted Logic procedures outlined for Logic/Virtual Inputs 1 to 14 in the previ- ous section. 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 285: Output Relays
Check that a voltage has appeared on the voltmeter. Turn off the source and disconnect the test wiring. 10. Change setting to: : "De-energized". S8 TESTING OUTPUT RELAYS FORCE SOLID STATE OUTPUT 11. Change setting to: : "Disabled". S8 TESTING OUTPUT RELAYS FORCE OUTPUT RELAYS FUNCTION GE Multilin 750/760 Feeder Management Relay Courtesy of NationalSwitchgear.com...
Page 286: Metering
): ±0.68 V for 50 to 130 V; ±2.18 V for all other voltages within the specified limits. Phase-phase voltages (calculated V ): ±1.36 V for 50 to 130 V; ±4.36 V for other voltages within the specified limits. 8-10 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 287 A2 METERING SYNCHRO VOLTAGE (Phasor) SYNCHRO VOLTAGE: SYNCHRO FREQ: SYNCHRO DELTA ΔF: ΔV: ΔF: Inject voltage of various magnitudes and frequencies into the line voltage input and verify the displays. GE Multilin 750/760 Feeder Management Relay 8-11 Courtesy of NationalSwitchgear.com...
Page 288: Power Metering
(not available when connected Delta) ΦC APPARENT PWR: A2 METERING Inject 3-phase voltage and current of various values and angles into the relay. Note that reactive power is measured and displayed. 8-12 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 289: Demand Metering
Check that the maximum current demand, including date and time of occurrence, is recorded and displayed. Repeat Steps 2 to 4 for Phases B and C. For Block Interval Demand: (for example, a time interval setting of 5 minutes), the procedure is as follows: GE Multilin 750/760 Feeder Management Relay 8-13...
Page 290 MAX APPARENT PWR DATE A2 METERING DMND APPARENT PWR MAX APPARENT PWR TIME Follow the procedure in Current Demand on page 8–13, except that the injected and monitored parameter is VA. 8-14 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 291: Analog Input Metering
Inject a fixed rate of ramping DC current (in mA) of various values into relay terminals A1(+) and A2(–) for at least 2 hours. At the end of this time, verify that the analog input is correctly measured and displayed in the value. A/I (/HOUR) GE Multilin 750/760 Feeder Management Relay 8-15 Courtesy of NationalSwitchgear.com...
Page 292: Protection Schemes
Inject current to cause a pickup and wait until the element times to Alarm. Check that the Alarm and Message LEDs are flashing, the Active Alarm message is displayed, and any output relays programmed to operate (as well as their associated LEDs) operate. 8-16 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 293 The time-to-trip should be much less than the trip-time established by the settings. The following procedure checks the voltage restrained Phase TOC function: Apply three-phase nominal voltage to the relay. GE Multilin 750/760 Feeder Management Relay 8-17 Courtesy of NationalSwitchgear.com...
Page 294 Inject current into Phases B and C at 150% of pickup. Inject current at a level below the pickup level into Phase A. Slowly increase the Phase A current until the Pickup LED comes on and note the pickup value. 8-18 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 295 The following descriptions present angles with reference to the polarizing voltage and assume an MTA set- ting of 180°. For an MTA setting other than 180° alter the noted angles to those established by the pro- NOTE grammed MTA. GE Multilin 750/760 Feeder Management Relay 8-19 Courtesy of NationalSwitchgear.com...
Page 296: Neutral Overcurrent
The blocking from logic inputs check is different from that for Phase TOC 1 and is performed as follows: Inject current to cause a pickup. Assert logic input to provide a "Block Neutral Time 2". The Pickup LED should immediately go out. 8-20 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 297 Slowly increase the angle of the Phase A current in the lagging direction. At an angle lagging Van by 270° ±2°, any out- put relays programmed for this condition should operate if the function is set to “Control”. If the function is set to GE Multilin 750/760 Feeder Management Relay 8-21 Courtesy of NationalSwitchgear.com...
Page 298 Inject a current of 0.2 x nominal into the phase current input of the relay (3I ) at an angle outside the tripping region of the set MTA, as compared to faulted phase voltage V . The Neutral Directional Reverse alarm should appear. 8-22 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 299: Ground Overcurrent
Assert a logic input to provide a "Blk Sens Gnd Time". The Pickup LED should immediately go out. Repeat Steps 1 and 2 for logic inputs "Block Sens Gnd O/C", "Block All O/C" and “Block 1 Trip Relay” as required. GE Multilin 750/760 Feeder Management Relay 8-23 Courtesy of NationalSwitchgear.com...
Page 300: Negative-Sequence Overcurrent And Voltage
Slowly raise the voltage until the Pickup LED comes on. This is the pickup level. Lower the voltage until the Pickup LED goes out. This is the reset voltage, which should be 2% of VT less than the pickup level. 8-24 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 301: Voltage
Lower V until the Pickup LED comes on. This is the pickup voltage of V Repeat Steps 1 through 7, substituting V for V for V and V for V GE Multilin 750/760 Feeder Management Relay 8-25 Courtesy of NationalSwitchgear.com...
Page 302 Connection or Figure 8–2: Relay Test Wiring – Delta Connection on page 8–3. The procedures for testing Indications and Operations are the same as those outlined for Phase TOC 1 on page 8–16. The following procedure tests Blocking From Logic Inputs: 8-26 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 303 2% of VT. Raise V until the Pickup LED comes on. Repeat Steps 1 through 4, substituting V for V for V and V for V GE Multilin 750/760 Feeder Management Relay 8-27 Courtesy of NationalSwitchgear.com...
Page 304 The following procedure tests the Pickup Level: Apply a three phase balanced nominal voltage to the relay. Reduce one phase voltage slowly until the Neutral Displacement element operates and note this voltage. 8-28 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 305: Frequency
97 to 98% of the Minimum Operating Current level. For the following Underfrequency test procedures, the injected voltage and currents are always above the minimum operating levels. NOTE GE Multilin 750/760 Feeder Management Relay 8-29 Courtesy of NationalSwitchgear.com...
Page 306 , drop the frequency of V at a speed greater FREQ DECAY PICKUP than the setting. The Pickup LED should come on while the V frequency is dropping. FREQ DECAY RATE 8-30 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 307: Breaker Failure
BRKR FAILURE CURRENT input. Assert a Trip logic input, which cannot be performed by the breaker. The element should not generate an output. GE Multilin 750/760 Feeder Management Relay 8-31 Courtesy of NationalSwitchgear.com...
Page 308: Reverse Power
Inject the preset voltage and current and note the measured delay time. Reset the timer. Repeat Step 3 four more times and obtain an average of the time intervals. Disconnect the Stop Trigger. 8-32 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 309: Monitoring
Inject the prefault voltages and currents, then apply the fault. The relay should trip and determine the type of fault (A- G), the distance to the fault (5.0 km) and the reactance to the fault (2.73 Ω). GE Multilin 750/760 Feeder Management Relay 8-33 Courtesy of NationalSwitchgear.com...
Page 310: Demand Monitoring
Clear demand data registers before starting this test. Inject a fixed value of vars. Monitor the actual value of the measured demand, and note the level at which the feature generates an output. Turn the current off. 8-34 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 311: Analog Inputs
Inject voltage at a frequency below the pickup level into Phase A. Slowly increase the frequency until the element generates an output. Slowly reduce the frequency until the element resets. GE Multilin 750/760 Feeder Management Relay 8-35 Courtesy of NationalSwitchgear.com...
Page 312: Power Factor
Alarm and Message LEDs are flashing, the VT Failure alarm message is displayed, and any output relays pro- grammed for this condition are operated. Apply the balanced voltages and the VT Failure condition should reset. 8-36 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 313: Trip Coil Monitor
Restore the open circuit and reset the relay. Open and close the breaker a number of times to confirm the delay time provides sufficient margin to allow for normal operation of the breaker. GE Multilin 750/760 Feeder Management Relay 8-37...
Page 314: Arcing Current
A procedure is available upon request from GE Multilin for those users wishing to perform this test. We suggest the following procedure to confirm this element is operational.
Page 315 De-assert logic input Setpoint Group 2. The faceplate LED should indicate the relay is still using Setpoint Group 2. Reduce the injected current until the overcurrent element resets. The LED on the faceplate should indicate the relay is now using Setpoint Group 1. Turn current off. GE Multilin 750/760 Feeder Management Relay 8-39...
Page 316 The “Out of Sync” alarm will be displayed as the line voltage is below the minimum voltage requirement. Slowly raise this voltage until the “Out of Sync” alarm is no longer displayed. This magnitude should be the setpoint value. 8-40 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 317 Slowly reduce the bus voltage magnitude until the “Out of Sync” alarm is no longer displayed. This should be at the dead bus max volt limit. Turn both voltages off. The “Out of Sync” alarm will be displayed as the line voltage is below its minimum voltage setting limit. GE Multilin 750/760 Feeder Management Relay 8-41...
Page 318 Alarm LED turned on. After a time interval equal to the Manual Close Block Time, the above indications should reset. This interval can be checked in the Event Recorder. 8-42 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 319 Wait until the element operates, as shown by the Pickup LED coming on at the end of the programmed time. COLD LOAD PICKUP BLOCK GE Multilin 750/760 Feeder Management Relay 8-43 Courtesy of NationalSwitchgear.com...
Page 320 LED should be displayed, and output relays operated. 12. Provide a Reset to the relay, and the alarm message and LED should be removed from the display and output relays reset. Remove the Reset. 8-44 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 321 0 and V to nominal. 20. Slowly raise V until the Close Relay operates. This is the operating level of the set- UNDERVOLT RESTORE MIN VOLTS point for V with V GE Multilin 750/760 Feeder Management Relay 8-45 Courtesy of NationalSwitchgear.com...
Page 322 Reduce the frequency to below the underfrequency pickup level. After the programmed delay Underfrequency 1 should cause a trip, which should not initiate underfrequency restoration as the breaker is closed. Diagnostic message "Ufreq Restore Init" should not be displayed. 8-46 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 323 De-assert Logic Inputs 1, 2, 3, 4, 5, 6, 11, 12, and 13 at both Incomer relays. De-assert Logic Inputs 1, 2, 3, 4, 5, 6, and 11 at the Bus Tie relay. GE Multilin 750/760 Feeder Management Relay 8-47...
Page 324 27. Assert Logic Input 11 (Block Transfer) at the Incomer 2 relay; Output Relays 5 and 7 should reset; at both Incomer relays the Transfer Not Ready message should be displayed. 8-48 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 325 Momentarily assert Logic Input 2 (Remote Close) at the Incomer 2 relay. The Incomer 2 breaker should close. Check the Event Recorders in the Incomer 2 and Bus Tie relays for the correct messages and sequences, then clear the recorders. GE Multilin 750/760 Feeder Management Relay 8-49...
Page 326 At the Bus Tie relay de-assert Logic Input 6 (Selected To Trip). Check the Event Recorders in the Incomer 1 and Bus Tie relays for the correct messages and sequences, then clear the recorders. 8-50 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 327 After this the Incomer 2 breaker should trip. Turn the voltages off. Check the Event Recorders in the Incomer 1 and 2 and Bus Tie relays for the correct messages and sequences, then clear the recorders. GE Multilin 750/760 Feeder Management Relay 8-51...
Page 328 Assert a Block Reclosure logic input. The Reclosure Enabled LED should go out and the Reclosure Disabled LED come on. De-assert the Block Reclosure logic input. The Reclosure Enabled LED should come on and the Reclosure Disabled LED should go out. 8-52 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 329 The event recorder should have recorded logic input Ini- tiate Reclosure, Remote Open, the Reclose, and Reclosure Reset. Check the interval of the autoreclose reset timer in the event recorder. GE Multilin 750/760 Feeder Management Relay 8-53...
Page 330 PHASE CURRENT INCREASE NEUTRAL CURRENT INCREASE setpoint value. Turn the current on and then off. The value should increment by one. AR SHOT NUMBER IN EFFECT 8-54 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 331 Turn on the current. The relay will Trip and Autoreclose four times due to the following elements, in order: Phase TOC 1, Phase TOC 2, Phase IOC 1, Phase IOC 2, Phase TOC 1. The event recorder will show this sequence of events. Turn off the current, and reset the relay. GE Multilin 750/760 Feeder Management Relay 8-55...
Page 332 PHASE A(C) CURRENT LAST PHASE A(C) CURRENT DMND values. PHASE A CURRENT DMND Under subheading , verify the A2 METERING DMND REAL PWR LAST REAL PWR DMND MAX REAL PWR DMND values. 8-56 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 333 1 minute and is then reduced smoothly to zero as rapidly as possible. According to IEC255-5, the Hi-Pot test is repeated with a voltage not less than 500 V AC. Figure 8–7: DIELECTRIC STRENGTH WIRING GE Multilin 750/760 Feeder Management Relay 8-57...
Page 334 8.7 PLACING THE RELAY IN SERVICE 8 COMMISSIONING TESTS 8-58 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 335 A.1.1 REVERSE POWER To upgrade the 750/760 to include Mod 008 (Reverse Power), a special 16-digit passcode must be purchased from the GE Multilin Sales Department. As well, the firmware version must be 5.00 or higher. The latest firmware for the 750/760 can be obtained from the GE Multilin website at http://www.GEindustrial.com/multilin.
Page 336 Enabled) on page 5–72. Should assistance be required at any time during this procedure, please contact GE Multilin technical support at 1-800-547- 8629 (within the U.S. and Canada) or +1(905) 294-6222 (outside U.S. or Canada). You can also send an e-mail to our tech- nical support department at gemultilin@indsys.ge.com.
Page 337 APPENDIX A A.2 CONFORMITY A.2 CONFORMITY A.2.1 EU DECLARATION OF CONFORMITY GE Multilin 750/760 Feeder Management Relay Courtesy of NationalSwitchgear.com...
Page 338 24 months from date of ship- ment from factory. In the event of a failure covered by warranty, GE Multilin will undertake to repair or replace the relay providing the warrantor determined that it is defective and it is returned with all transportation charges prepaid to an authorized service centre or the factory.
Page 339 ................4-14 manual close ..............5-101 summary ................6-1 setpoints ................5-23 synchronizing voltage ............6-11 BREAKER FAILURE technical support ..............6-19 logic diagram ............... 5-71 trip counters ................. 6-15 GE Multilin 750/760 Feeder Management Relay Courtesy of NationalSwitchgear.com...
Page 340 EARTH FAULT synchrocheck ............... 8-40 restricted ................5-55 transfer ................8-47 ENERGY ACTUAL VALUES ..........6-12 underfrequency restoration ........... 8-46 undervoltage restoration ............8-44 ENTERING SETPOINTS COUNTERS with SR750/760 PC .............. 4-13 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 341 ............... 5-48 logic diagram ............... 5-65 protection scheme ..............8-23 protection scheme ..............8-27 setpoints ................5-48 setpoints ................5-65 setting example ..............1-7 LINE VT SENSING SETPOINTS ........... 5-17 GE Multilin 750/760 Feeder Management Relay Courtesy of NationalSwitchgear.com...
Page 342 ..............1-7 OVERVIEW ................2-1 NEGATIVE SEQUENCE VOLTAGE OVERVOLTAGE logic diagram ............... 5-62 logic diagram ............... 5-66 protection scheme ..............8-24 protection scheme ..............8-27 setpoints ................5-62 setpoints ................5-66 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 343 ............8-20 SAMPLE APPLICATION ............1-5 overvoltage ................8-27 phase directional overcurrent ..........8-19 SAVING SETPOINTS ............4-11 phase instantaneous overcurrent ......... 8-18 8-19 SCHEME SETUP SETPOINTS ........... 5-119 GE Multilin 750/760 Feeder Management Relay Courtesy of NationalSwitchgear.com...
Page 344 SCR OUTPUT ground instantaneous overcurrent ......... 5-49 SPECIFICATIONS ground time overcurrent ............5-48 clock ..................2-11 installation ................5-15 communications ..............2-11 installing the setpoint access jumper ........1-3 control ................. 2-10 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...
Page 345 1 logic diagram ............. 5-115 logic diagram ............... 5-94 incomer 2 DC schematic ............. 5-113 monitoring ................8-36 incomer 2 logic diagram ............. 5-116 setpoints ................5-94 one line diagram ..............5-111 GE Multilin 750/760 Feeder Management Relay Courtesy of NationalSwitchgear.com...
Page 346 ................4-16 WEBSITE ................1-1 WET CONTACT CONNECTIONS ......... 3-14 WARRANTY ................A-4 WATTHOURS MEASUREMENT ........... 8-12 WAVEFORM CAPTURE ZERO SEQUENCE CT INSTALLATION ....... 3-10 description ..............2-3 4-15 viii 750/760 Feeder Management Relay GE Multilin Courtesy of NationalSwitchgear.com...

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Feeder management relay 760

GE Feeder Management Relay 750 Instruction Manual

1 Getting Started

2 Introduction

4 User Interfaces

5 Setpoints

6 Actual Values

7 Communications

8 Commissioning Tests

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Summary of Contents for GE Feeder Management Relay 750