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GE UR Series L90 Instruction Manual

Line current differential system.
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GE
Digital Energy
GE Digital Energy
650 Markland Street
Markham, Ontario
Canada L6C 0M1
Tel: +1 905 927 7070 Fax: +1 905 927 5098
Internet:
http://www.GEDigitalEnergy.com
*1601-0081-Z1*
L90 Line Current Differential
UR Series Instruction Manual
Manual P/N: 1601-0081-Z1 (GEK-119522)
E83849
LISTED
IND.CONT. EQ.
52TL
System
L90 revision: 7.1x
831776A2.CDR
GE Multilin's Quality Management
System is registered to ISO
9001:2008
QMI # 005094
UL # A3775

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Table of Contents

   Related Manuals for GE UR Series L90

   Summary of Contents for GE UR Series L90

  • Page 1 GE Digital Energy LISTED 650 Markland Street IND.CONT. EQ. 52TL Markham, Ontario GE Multilin's Quality Management Canada L6C 0M1 System is registered to ISO 9001:2008 Tel: +1 905 927 7070 Fax: +1 905 927 5098 QMI # 005094 UL # A3775 Internet: http://www.GEDigitalEnergy.com...
  • Page 2 The contents of this manual are the property of GE Multilin Inc. This documentation is furnished on license and may not be reproduced in whole or in part without the permission of GE Multilin. The content of this manual is for informational use only and is subject to change without notice.
  • Page 3: Table Of Contents

    OUTPUTS ......................2-29 2.4.8 COMMUNICATIONS..................2-30 2.4.9 INTER-RELAY COMMUNICATIONS ............... 2-31 2.4.10 ENVIRONMENTAL ..................2-31 2.4.11 TYPE TESTS ....................2-32 2.4.12 PRODUCTION TESTS ..................2-32 2.4.13 APPROVALS ....................2-33 2.4.14 MAINTENANCE ....................2-33 GE Multilin L90 Line Current Differential System...
  • Page 4 INTRODUCTION TO AC SOURCES..............5-5 5.2 PRODUCT SETUP 5.2.1 SECURITY......................5-8 5.2.2 CYBERSENTRY SECURITY................5-12 5.2.3 DISPLAY PROPERTIES ..................5-18 5.2.4 CLEAR RELAY RECORDS ................5-19 5.2.5 COMMUNICATIONS ..................5-21 5.2.6 MODBUS USER MAP ..................5-50 5.2.7 REAL TIME CLOCK ..................5-50 L90 Line Current Differential System GE Multilin...
  • Page 5 OVERFREQUENCY ..................5-262 5.7.8 FREQUENCY RATE OF CHANGE..............5-263 5.7.9 SYNCHROCHECK..................5-265 5.7.10 DIGITAL ELEMENTS..................5-269 5.7.11 DIGITAL COUNTERS ..................5-272 5.7.12 MONITORING ELEMENTS ................5-274 5.7.13 PILOT SCHEMES ..................5-297 5.7.14 AUTORECLOSE .................... 5-321 GE Multilin L90 Line Current Differential System...
  • Page 6 IEC 61580 GOOSE ANALOG VALUES ............6-22 6.3.10 WATTMETRIC GROUND FAULT..............6-23 6.3.11 PHASOR MEASUREMENT UNIT ..............6-23 6.3.12 RESTRICTED GROUND FAULT..............6-24 6.3.13 TRANSDUCER INPUTS AND OUTPUTS ............6-24 6.4 RECORDS 6.4.1 FAULT REPORTS ....................6-25 6.4.2 EVENT RECORDS ...................6-25 L90 Line Current Differential System GE Multilin...
  • Page 7 9.1.18 CHARGING CURRENT COMPENSATION ............. 9-13 9.1.19 DIFFERENTIAL ELEMENT CHARACTERISTICS........... 9-14 9.1.20 RELAY SYNCHRONIZATION................9-15 9.2 OPERATING CONDITION CHARACTERISTICS 9.2.1 DESCRIPTION....................9-16 9.2.2 TRIP DECISION EXAMPLE................9-18 9.2.3 TRIP DECISION TEST ..................9-18 GE Multilin L90 Line Current Differential System...
  • Page 8 DISTANCE SETTINGS ON SERIES COMPENSATED LINES ......10-22 10.6.2 GROUND DIRECTIONAL OVERCURRENT ..........10-23 10.7 LINES WITH TAPPED TRANSFORMERS 10.7.1 DESCRIPTION ....................10-24 10.7.2 TRANSFORMER LOAD CURRENTS ............10-24 10.7.3 LV-SIDE FAULTS ...................10-25 10.7.4 EXTERNAL GROUND FAULTS ..............10-25 viii L90 Line Current Differential System GE Multilin...
  • Page 9 GGIO4: GENERIC ANALOG MEASURED VALUES .........C-2 C.2.6 MMXU: ANALOG MEASURED VALUES............C-3 C.2.7 PROTECTION AND OTHER LOGICAL NODES ..........C-3 C.3 SERVER FEATURES AND CONFIGURATION C.3.1 BUFFERED/UNBUFFERED REPORTING ............C-5 C.3.2 FILE TRANSFER ....................C-5 C.3.3 TIMESTAMPS AND SCANNING ...............C-5 GE Multilin L90 Line Current Differential System...
  • Page 10 ANALOG INPUTS.................... E-11 F. MISCELLANEOUS F.1 CHANGE NOTES F.1.1 REVISION HISTORY..................F-1 F.1.2 CHANGES TO THE L90 MANUAL ..............F-2 F.2 ABBREVIATIONS F.2.1 STANDARD ABBREVIATIONS ................. F-5 F.3 WARRANTY F.3.1 GE MULTILIN WARRANTY................F-9 L90 Line Current Differential System GE Multilin...
  • Page 11 (Cd), ólom (Pb) vagy higany (Hg) tartalomra utaló betűjelzés. A hulladék akkumulátor leadható a termék forgalmazójánál új akkumulátor vásárlásakor, vagy a kijelölt elektronikai hulladékudvarokban. További információ a www.recyclethis.info oldalon. GE Multilin L90 Line Current Differential System...
  • Page 12 Batteriet är märkt med denna symbol, vilket kan innebära att det innehåller kadmium (Cd), bly (Pb) eller kvicksilver (Hg). För korrekt återvinning skall batteriet returneras till leverantören eller till en därför avsedd deponering. För mer information, se: www.recyclethis.info. L90 Line Current Differential System GE Multilin...
  • Page 13 North America 905-294-6222 Latin America +55 11 3614 1700 Europe, Middle East, Africa +(34) 94 485 88 00 Asia +86-21-2401-3208 India +91 80 41314617 From GE Part Number 1604-0021-A1, GE Publication Number GEK-113574 GE Multilin L90 Line Current Differential System xiii...
  • Page 14 0.1 BATTERY DISPOSAL 0 BATTERY DISPOSAL L90 Line Current Differential System GE Multilin...
  • Page 15: Getting Started

    This product is rated to Class A emissions levels and is to be used in Utility, Substation Industrial environments. Not to be used near electronic devices rated for Class B levels. Inspection Checklist GE Multilin L90 Line Current Differential System...
  • Page 16 For product information, instruction manual updates, and the latest software updates, visit the GE Digital Energy website at http://www.gedigitalenergy.com. If there is any noticeable physical damage, or any of the contents listed are missing, please contact GE Digital Energy immediately.
  • Page 17: Ur Overview

    This new generation of equipment is easily incorporated into automation systems, at both the station and enterprise levels. The GE Multilin Uni- versal Relay (UR) series meets these goals.
  • Page 18 The UR-series devices operate in a cyclic scan fashion. The device reads the inputs into an input status table, solves the logic program (FlexLogic equation), and then sets each output to the appropriate state in an output status table. Any result- ing task execution is priority interrupt-driven. Figure 1–3: UR-SERIES SCAN OPERATION L90 Line Current Differential System GE Multilin...
  • Page 19: Software Architecture

    5. An explanation of the use of inputs from CTs and VTs is in the Introduction to AC sources section in chapter 5. A description of how digital signals are used and routed within the relay is contained in the Introduction to FlexLogic section in chapter 5. GE Multilin L90 Line Current Differential System...
  • Page 20: Enervista Ur Setup Software

    PCTEL 2304WT V.92 MDC internal modem 1.3.2 INSTALLATION After ensuring the minimum requirements for using EnerVista UR Setup are met (previous section), install the EnerVista UR Setup from the GE EnerVista CD. Or download the UR EnerVista software from http://www.gedigitalenergy.com/multilin and install it.
  • Page 21: Configuring The L90 For Software Access

    EnerVista UR Setup software. The L90 can also be accessed locally with a laptop computer through the front panel RS232 port or the rear Ethernet port using the Quick Connect feature. • To configure the L90 for remote access via the rear RS485 port, see the Configuring Serial Communications section. GE Multilin L90 Line Current Differential System...
  • Page 22 A GE Multilin F485 converter (or compatible RS232-to-RS485 converter) is required. Refer to the F485 instruction manual for details. Verify that the latest version of the EnerVista UR Setup software is installed (available from the GE EnerVista CD or online from http://www.gedigitalenergy.com/multilin). See the Software Installation section if not already installed.
  • Page 23 UR device must be on the same subnet. Verify that the latest version of the EnerVista UR Setup software is installed (available from the GE EnerVista CD or online from http://www.gedigitalenergy.com/multilin). See the Software Installation section for installation details.
  • Page 24: Using The Quick Connect Feature

    Before starting, verify that the serial cable is properly connected from the computer to the front panel RS232 port with a straight-through 9-pin to 9-pin RS232 cable. Verify that the latest version of the EnerVista UR Setup software is installed (available from the GE EnerVista CD or online from http://www.gedigitalenergy.com/multilin). See the Software Installation section if not already installed.
  • Page 25 Now, assign the computer an IP address compatible with the relay’s IP address. From the Windows desktop, right-click the My Network Places icon and select Properties to open the network con- nections window. Right-click the Local Area Connection icon and select Properties. GE Multilin L90 Line Current Differential System 1-11...
  • Page 26 Minimum = 0ms, Maximum = 0ms, Average = 0 ms Note that the values for vary depending on local network configuration. time If the following sequence of messages appears when entering the command: C:\WINNT>ping 1.1.1.1 1-12 L90 Line Current Differential System GE Multilin...
  • Page 27 Default Gateway ..: C:\WINNT> It can be necessary to restart the computer for the change in IP address to take effect (Windows 98 or NT). GE Multilin L90 Line Current Differential System 1-13...
  • Page 28 From the Windows desktop, right-click the My Network Places icon and select Properties to open the network con- nections window. Right-click the Local Area Connection icon and select the Properties item. Select the Internet Protocol (TCP/IP) item from the list provided and click the Properties button. 1-14 L90 Line Current Differential System GE Multilin...
  • Page 29 The EnerVista UR Setup software then proceeds to configure all settings and order code options in the Device Setup menu. This feature allows the user to identify and interrogate all UR-series devices at a loca- tion. GE Multilin L90 Line Current Differential System 1-15...
  • Page 30: Connecting To The L90 Relay

    View the last recorded oscillography record • View the status of all L90 inputs and outputs • View all of the L90 metering values • View the L90 protection summary • Generate a service report 1-16 L90 Line Current Differential System GE Multilin...
  • Page 31: Ur Hardware

    Figure 1–7: RELAY COMMUNICATION OPTIONS To communicate through the L90 rear RS485 port from a computer RS232 port, the GE Multilin RS232/RS485 converter box is required. This device (catalog number F485) connects to the computer using a straight-through serial cable. A shielded twisted-pair (20, 22, or 24 AWG) connects the F485 converter to the L90 rear communications port.
  • Page 32: Using The Relay

    To put the relay in the “Programmed” state, press either of the VALUE keys once and then press ENTER. The face- plate Trouble LED turns off and the In Service LED turns on. 1-18 L90 Line Current Differential System GE Multilin...
  • Page 33: Relay Passwords

    See the Changing Settings section in Chapter 4 for complete instructions on setting security-level passwords. 1.5.6 FLEXLOGIC CUSTOMIZATION NOTE FlexLogic equation editing is required for setting user-defined logic for customizing the relay operations. See the FlexLogic section in Chapter 5. GE Multilin L90 Line Current Differential System 1-19...
  • Page 34: Commissioning

    Unscheduled maintenance, such as a disturbance causing system interruption: View the event recorder and oscillography or fault report for correct operation of inputs, outputs, and elements. If it is concluded that the relay or one of its modules is of concern, contact GE Multilin for service. 1-20...
  • Page 35: Product Description

    The L90 uses per phase differential at 64 kbps transmitting two phaselets per cycle. The current differential scheme is based on innovative patented techniques developed by GE. The L90 algorithms are based on the Fourier transform– phaselet approach and an adaptive statistical restraint. The restraint is similar to a traditional percentage differential scheme, but is adaptive based on relay measurements.
  • Page 36 Direct Inputs (8 per L90 comms channel) Non-Volatile Selector Switch VT Fuse Failure Disconnect Switches Open Pole Detector DNP 3.0 or IEC 60870-5-104 protocol Oscillography Event Recorder Pilot Schemes Fault Locator Setting Groups (6) L90 Line Current Differential System GE Multilin...
  • Page 37: Features

    Zero-sequence removal for application on lines with tapped transformers connected in a grounded wye on the line side • GE phaselets approach based on the Discrete Fourier Transform with 64 samples per cycle and transmitting two time- stamped phaselets per cycle •...
  • Page 38: Ordering

    Each of these modules can be supplied in a number of configurations specified at the time of ordering. The information required to completely specify the relay is provided in the following tables (see chapter 3 for full details of relay modules). Order codes are subject to change without notice. See the GE Multilin ordering page at http://www.gedigitalenergy.com/multilin/order.htm for the latest ordering options.
  • Page 39 IEEE 1588, PRP, CyberSentry Lvl 1, In-zone transformer protection, IEC 61850, Breaker-and-a-half IEEE 1588, PRP, CyberSentry Lvl 1, In-zone transformer protection, breaker-and-a-hal, and PMU IEEE 1588, PRP, CyberSentry Lvl 1, In-zone Tx protection, IEC 61850, breaker-and-a half, and PMU GE Multilin L90 Line Current Differential System...
  • Page 40 CyberSentry Lvl 1, IEC 61850, and Breaker-and-a-half CyberSentry Lvl 1 and PMU CyberSentry Lvl 1, IEC 61850, and PMU CyberSentry Lvl 1, PMU, and Breaker-and-a-half CyberSentry Lvl 1, IEC 61850, PMU, and Breaker-and-a-half L90 Line Current Differential System GE Multilin...
  • Page 41 Enhanced front panel with Russian display and user-programmable pushbuttons Enhanced front panel with Chinese display and user-programmable pushbuttons Enhanced front panel with Turkish display Enhanced front panel with Turkish display and user-programmable pushbuttons GE Multilin L90 Line Current Differential System...
  • Page 42 IEEE 1588, IEC 61850, and In-zone transformer protection IEEE 1588, PMU, and In-zone transformer protection IEEE 1588, IEC 61850, PMU, and In-zone transformer protection Parallel Redundancy Protocol (PRP) PRP and Breaker-and-a-half PRP and IEC 61850 PRP, IEC 61850, and Breaker-and-a-half L90 Line Current Differential System GE Multilin...
  • Page 43 IEEE 1588, PRP, CyberSentry Lvl 1, In-zone transformer protection, IEC 61850, Breaker-and-a-half IEEE 1588, PRP, CyberSentry Lvl 1, In-zone transformer protection, breaker-and-a-hal, and PMU IEEE 1588, PRP, CyberSentry Lvl 1, In-zone Tx protection, IEC 61850, breaker-and-a half, and PMU GE Multilin L90 Line Current Differential System...
  • Page 44 CyberSentry Lvl 1, IEC 61850, PMU, and In-zone transformer protection IEEE 1588 IEEE 1588 and Breaker-and-a-half IEEE 1588 and IEC 61850 IEEE 1588, IEC 61850, and Breaker-and-a-half IEEE 1588 and PMU IEEE 1588, IEC 61850, and PMU 2-10 L90 Line Current Differential System GE Multilin...
  • Page 45 Enhanced front panel with English display and user-programmable pushbuttons Enhanced front panel with French display and user-programmable pushbuttons Enhanced front panel with Russian display and user-programmable pushbuttons Enhanced front panel with Chinese display and user-programmable pushbuttons GE Multilin L90 Line Current Differential System 2-11...
  • Page 46: Replacement Modules

    Not all replacement modules may be applicable to the L90 relay. Only the modules specified in the order codes are available as replacement modules. NOTE Replacement module codes are subject to change without notice. See the GE Multilin ordering page at http://www.gedigitalenergy.com/multilin/order.htm for the latest L90 ordering options.
  • Page 47 4 dcmA inputs, 4 dcmA outputs (only one 5A module is allowed) 8 RTD inputs INPUTS/OUTPUTS 4 RTD inputs, 4 dcmA outputs (only one 5D module is allowed) 4 dcmA inputs, 4 RTD inputs 8 dcmA inputs GE Multilin L90 Line Current Differential System 2-13...
  • Page 48 4 dcmA inputs, 4 dcmA outputs (only one 5A module is allowed) 8 RTD inputs INPUTS/OUTPUTS 4 RTD inputs, 4 dcmA outputs (only one 5D module is allowed) 4 dcmA inputs, 4 RTD inputs 8 dcmA inputs 2-14 L90 Line Current Differential System GE Multilin...
  • Page 49: Pilot Channel Relaying

    Receives current differential DTT and Direct Input signals from all other L90 relays • Transmits direct output signals to all communicating relays • Sends synchronization information of local clock to all other L90 clocks The master L90 relay performs the following functions: GE Multilin L90 Line Current Differential System 2-15...
  • Page 50: Channel Monitor

    Every relay on the protec- tion system can assigned an unique ID to prevent advertent loopbacks at multiplexed channels. 2-16 L90 Line Current Differential System GE Multilin...
  • Page 51: Loopback Test

    L90 communications channel to create trip, block, or signaling logic. A FlexLogic operand, an external contact closure, or a signal over the LAN communication channels can be assigned for that logic. GE Multilin L90 Line Current Differential System...
  • Page 52: Functionality

    The processors in the CPU and all CT/VT modules participate in startup self-testing. Self-testing checks approximately 85 to 90% of the hardware, and CRC/check-sum verification of all PROMs is performed. The proces- 2-18 L90 Line Current Differential System GE Multilin...
  • Page 53: Other Functions

    PFLL Status Frequency Deviation Phase and Frequency Master Locked Loop (PFLL) Clock Phase Deviation PHASELETS TO REMOTE Communications Remote Relay PHASELETS FROM REMOTE Interface Direct Transfer Trip 831732A3.CDR Figure 2–3: L90 BLOCK DIAGRAM GE Multilin L90 Line Current Differential System 2-19...
  • Page 54: Specifications

    1 to 1.5 cycles (typical) Reset time: 1 power cycle (typical) LINE PICKUP Phase instantaneous overcurrent: 0.000 to 30.000 pu Undervoltage pickup: 0.000 to 3.000 pu Overvoltage delay: 0.000 to 65.535 s 2-20 L90 Line Current Differential System GE Multilin...
  • Page 55 Breakpoint between slopes: 0.0 to 20.0 pu in steps of 0.1 Curve shapes: IEEE Moderately/Very/Extremely Zero-sequence current differential (87LG): Inverse; IEC (and BS) A/B/C and Short Inverse; GE IAC Inverse, Short/Very/ 87LG pickup level: 0.05 to 1.00 pu in steps of 0.01 Extremely Inverse; I t; FlexCurves™...
  • Page 56 –90 to 90° in steps of 1 Inverse; IEC (and BS) A/B/C and Short Limit angle: 40 to 90° in steps of 1, independent for Inverse; GE IAC Inverse, Short/Very/ forward and reverse Extremely Inverse; I t; FlexCurves™ (programmable); Definite Time (0.01 s Angle accuracy: ±2°...
  • Page 57 ±3% of operate time or ±1/4 cycle Level accuracy: ±0.5% of reading from 10 to 208 V (whichever is greater) Curve shapes: GE IAV Inverse, Definite Time Operate time: typically 4 cycles at 0.1 Hz/s change typically 3.5 cycles at 0.3 Hz/s change Curve multiplier: Time Dial = 0 to 600.00 in steps of 0.01...
  • Page 58 ±2° Characteristic limit angles: 40 to 140° in steps of 1 Timers: 0.000 to 65.535 s in steps of 0.001 Timer accuracy: ±3% of operate time or ±1/4 cycle (whichever is greater) 2-24 L90 Line Current Differential System GE Multilin...
  • Page 59: User-programmable Elements

    LEDs on Test sequence 2: all LEDs off, one LED at a time on for 1 s Test sequence 3: all LEDs on, one LED at a time off for 1 s GE Multilin L90 Line Current Differential System 2-25...
  • Page 60: Monitoring

    Storage capacity: (NN is dependent on memory) 1-second rate: 01 channel for NN days 16 channels for NN days  60-minute rate: 01 channel for NN days 16 channels for NN days 2-26 L90 Line Current Differential System GE Multilin...
  • Page 61: Metering

    Phases A, B, and C present and maxi- CT rating and 0.8 to mum measured currents 1.2 x VT rating: ±1.0% of reading 3-Phase Power (P, Q, and S) present and maximum measured currents Accuracy: ±2.0% GE Multilin L90 Line Current Differential System 2-27...
  • Page 62: Inputs

    < 1 ms Remote devices: Debounce time: 0.0 to 16.0 ms in steps of 0.5 Default states on loss of comms.: On, Off, Latest/Off, Latest/On Continuous current draw:3 mA (when energized) Remote DPS inputs: 2-28 L90 Line Current Differential System GE Multilin...
  • Page 63: Power Supply

    Operate time: < 0.6 ms FORM-A VOLTAGE MONITOR Internal Limiting Resistor: 100 , 2 W Applicable voltage: approx. 15 to 250 V DC Trickle current: approx. 1 to 2.5 mA GE Multilin L90 Line Current Differential System 2-29...
  • Page 64: Communications

    Typical distance 2 km Duplex full/half Redundancy ETHERNET (10/100 MB TWISTED PAIR) Modes: 10 MB, 10/100 MB (auto-detect) Connector: RJ45 SIMPLE NETWORK TIME PROTOCOL (SNTP) clock synchronization error: <10 ms (typical) 2-30 L90 Line Current Differential System GE Multilin...
  • Page 65: Inter-relay Communications

    Pollution degree: impaired at temperatures less than – Overvoltage category: 20°C Ingress protection: IP20 front, IP10 back HUMIDITY Humidity: operating up to 95% (non-condensing) at 55°C (as per IEC60068-2-30 variant 1, 6 days). GE Multilin L90 Line Current Differential System 2-31...
  • Page 66: Type Tests

    Safety UL508 e83849 NKCR Safety UL C22.2-14 e83849 NKCR7 Safety UL1053 e83849 NKCR 2.4.12 PRODUCTION TESTS THERMAL Products go through an environmental test based upon an Accepted Quality Level (AQL) sampling process. 2-32 L90 Line Current Differential System GE Multilin...
  • Page 67: Approvals

    To avoid deterioration of electrolytic capacitors, power up units that are stored in a de-energized state once per year, for one hour continuously. GE Multilin L90 Line Current Differential System 2-33...
  • Page 68 2.4 SPECIFICATIONS 2 PRODUCT DESCRIPTION 2-34 L90 Line Current Differential System GE Multilin...
  • Page 69: Hardware

    11.016” [279,81 mm] 9.687” [246,05 mm] 17.56” [446,02 mm] 7.460” [189,48 mm] 6.995” 6.960” [177,67 mm] [176,78 mm] 19.040” [483,62 mm] 842807A1.CDR Figure 3–1: L90 HORIZONTAL DIMENSIONS (ENHANCED PANEL) GE Multilin L90 Line Current Differential System...
  • Page 70 The case dimensions are shown below, along with panel cutout details for panel mounting. When planning the location of your panel cutout, ensure that provision is made for the faceplate to swing open without interference to or from adjacent equipment. L90 Line Current Differential System GE Multilin...
  • Page 71 RS232 communications port. The relay is secured to the panel with the use of four screws supplied with the relay. 11.015” 7.482” 1.329” 13.560” 15.000” 14.025” 4.000” 9.780” 843809A1.CDR Figure 3–4: L90 VERTICAL DIMENSIONS (ENHANCED PANEL) GE Multilin L90 Line Current Differential System...
  • Page 72 Figure 3–5: L90 VERTICAL MOUNTING AND DIMENSIONS (STANDARD PANEL) For details on side mounting L90 devices with the enhanced front panel, refer to the following documents available online from the GE Multilin website. • GEK-113180: UR-series UR-V side-mounting front panel assembly instructions.
  • Page 73 3 HARDWARE 3.1 DESCRIPTION Figure 3–6: L90 VERTICAL SIDE MOUNTING INSTALLATION (STANDARD PANEL) GE Multilin L90 Line Current Differential System...
  • Page 74: Module Withdrawal And Insertion

    The enhanced faceplate can be opened to the left, once the thumb screw has been removed, as shown below. This allows for easy accessibility of the modules for withdrawal. The new wide-angle hinge assembly in the enhanced front panel opens completely and allows easy access to all modules in the L90. L90 Line Current Differential System GE Multilin...
  • Page 75 The new CT/VT modules can only be used with new CPUs; similarly, old CT/VT modules can only be used with old CPUs. In the event that there is a mismatch between the CPU and CT/VT module, the relay does not function and error displays. NOTE DSP ERROR HARDWARE MISMATCH GE Multilin L90 Line Current Differential System...
  • Page 76: Rear Terminal Layout

    (nearest to CPU module) which is indicated by an arrow marker on the terminal block. See the following figure for an example of rear terminal assignments. Figure 3–11: EXAMPLE OF MODULES IN F AND H SLOTS L90 Line Current Differential System GE Multilin...
  • Page 77: Wiring

    3 HARDWARE 3.2 WIRING 3.2WIRING 3.2.1 TYPICAL WIRING Figure 3–12: TYPICAL WIRING DIAGRAM GE Multilin L90 Line Current Differential System...
  • Page 78: Dielectric Strength

    An LED on the front of the control power module shows the status of the power supply: LED INDICATION POWER SUPPLY CONTINUOUS ON ON / OFF CYCLING Failure Failure 3-10 L90 Line Current Differential System GE Multilin...
  • Page 79: Ct/vt Modules

    CT connections for both ABC and ACB phase rotations are identical as shown in the Typical wiring diagram. The exact placement of a zero-sequence core balance CT to detect ground fault current is shown below. Twisted-pair cabling on the zero-sequence CT is recommended. GE Multilin L90 Line Current Differential System 3-11...
  • Page 80 NOTE Current inputs Voltage inputs 8F, 8G, 8L, and 8M modules (4 CTs and 4 VTs) Current inputs 8H, 8J, 8N, and 8R modules (8 CTs) 842766A3.CDR Figure 3–15: CT/VT MODULE WIRING 3-12 L90 Line Current Differential System GE Multilin...
  • Page 81: Process Bus Modules

    3.2.5 PROCESS BUS MODULES The L90 can be ordered with a process bus interface module. This module is designed to interface with the GE Multilin HardFiber system, allowing bidirectional IEC 61850 fiber optic communications with up to eight HardFiber merging units, known as Bricks.
  • Page 82 Logic operand driving the contact output should be given a reset delay of 10 ms to prevent damage of the output contact (in situations when the element initiating the contact output is bouncing, at val- ues in the region of the pickup value). 3-14 L90 Line Current Differential System GE Multilin...
  • Page 83 ~7a, ~7c 2 Inputs ~7a, ~7c 2 Inputs ~7a, ~7c 2 Inputs ~7a, ~7c 2 Inputs ~8a, ~8c 2 Inputs ~8a, ~8c 2 Inputs ~8a, ~8c 2 Inputs ~8a, ~8c 2 Inputs GE Multilin L90 Line Current Differential System 3-15...
  • Page 84 ~5a, ~5c 2 Inputs 2 Outputs Solid-State Solid-State ~6a, ~6c 2 Inputs 2 Outputs Not Used Not Used ~7a, ~7c 2 Inputs 2 Outputs Solid-State Solid-State ~8a, ~8c 2 Inputs Not Used 3-16 L90 Line Current Differential System GE Multilin...
  • Page 85 3 HARDWARE 3.2 WIRING Figure 3–17: CONTACT INPUT AND OUTPUT MODULE WIRING (1 of 2) GE Multilin L90 Line Current Differential System 3-17...
  • Page 86 CONTACT IN COMMON SURGE 842763A2.CDR Figure 3–18: CONTACT INPUT AND OUTPUT MODULE WIRING (2 of 2) For proper functionality, observe correct polarity for all contact input and solid state output connec- tions. 3-18 L90 Line Current Differential System GE Multilin...
  • Page 87 There is no provision in the relay to detect a DC ground fault on 48 V DC control power external output. We recom- mend using an external DC supply. NOTE GE Multilin L90 Line Current Differential System 3-19...
  • Page 88 CONTACT INPUT 2 AUTO-BURNISH = ON 842751A1.CDR Figure 3–21: AUTO-BURNISH DIP SWITCHES The auto-burnish circuitry has an internal fuse for safety purposes. During regular maintenance, check the auto- burnish functionality using an oscilloscope. NOTE 3-20 L90 Line Current Differential System GE Multilin...
  • Page 89: Transducer Inputs And Outputs

    (5A, 5C, 5D, 5E, and 5F) and channel arrangements that can be ordered for the relay. Wherever a tilde “~” symbol appears, substitute with the slot position of the module. NOTE Figure 3–22: TRANSDUCER INPUT/OUTPUT MODULE WIRING GE Multilin L90 Line Current Differential System 3-21...
  • Page 90: Rs232 Faceplate Port

    3.2.9 CPU COMMUNICATION PORTS a) OPTIONS In addition to the faceplate RS232 port, the L90 provides a rear RS485 communication port. The CPU modules do not require a surge ground connection. NOTE 3-22 L90 Line Current Differential System GE Multilin...
  • Page 91 For larger systems, additional serial channels must be added. It is also possible to use com- mercially available repeaters to have more than 32 relays on a single channel. Avoid star or stub connections entirely. GE Multilin L90 Line Current Differential System...
  • Page 92 62.5 µm for 100 Mbps. For optical power budgeting, splices are required every 1 km for the transmitter/receiver pair. When splicing optical fibers, the diameter and numerical aperture of each fiber must be the same. 3-24 L90 Line Current Differential System GE Multilin...
  • Page 93: Irig-b

    Using an amplitude modulated receiver causes errors up to 1 ms in event time-stamping. NOTE Using an amplitude modulated receiver also causes errors of up to 1 ms in metered synchrophasor values. NOTE GE Multilin L90 Line Current Differential System 3-25...
  • Page 94: Pilot Channel Communications

    RS422, 1 channel RS422, 2 channels, 2 clock inputs RS422, 2 channels All of the fiber modules use ST type connectors. For two-terminal applications, each L90 relay requires at least one com- munications channel. 3-26 L90 Line Current Differential System GE Multilin...
  • Page 95: Fiber: Led And Eled Transmitters

    The following figure shows the configuration for the 72, 73, 7D, and 7K fiber-laser module. Figure 3–28: LASER FIBER MODULES When using a laser Interface, attenuators can be necessary to ensure that you do not exceed the maximum optical input power to the receiver. GE Multilin L90 Line Current Differential System 3-27...
  • Page 96: Interface

    Remove the top cover by sliding it towards the rear and then lift it upwards. Set the timing selection switches (channel 1, channel 2) to the desired timing modes. Replace the top cover and the cover screw. 3-28 L90 Line Current Differential System GE Multilin...
  • Page 97 For connection to a higher order system (UR- to-multiplexer, factory defaults), set to octet timing (S1 = ON) and set timing mode to loop timing (S5 = OFF and S6 = OFF). GE Multilin L90 Line Current Differential System 3-29...
  • Page 98 G.703 line side of the interface while the other lies on the differential Manchester side of the interface. DMR = Differential Manchester Receiver DMX = Differential Manchester Transmitter G7X = G.703 Transmitter G7R = G.703 Receiver 842775A1.CDR Figure 3–33: G.703 DUAL LOOPBACK MODE 3-30 L90 Line Current Differential System GE Multilin...
  • Page 99: Rs422 Interface

    (data module 1), connects to the clock inputs of the UR–RS422 interface in the usual fashion. In addition, the send timing outputs of data module 1 is also paralleled to the terminal timing inputs of data module 2. By using this con- GE Multilin L90 Line Current Differential System...
  • Page 100 For example, the following figure shows the positive edge of the Tx clock in the center of the Tx data bit. Tx Clock Tx Data Figure 3–37: CLOCK AND DATA TRANSITIONS 3-32 L90 Line Current Differential System GE Multilin...
  • Page 101: Two-channel Two-clock Rs422 Interface

    When using a LASER Interface, attenuators can be necessary to ensure that you do not exceed maximum optical input power to the receiver. Figure 3–39: RS422 AND FIBER INTERFACE CONNECTION Connections shown above are for multiplexers configured as DCE (data communications equipment) units. GE Multilin L90 Line Current Differential System 3-33...
  • Page 102: And Fiber Interface

    Connection: as per all fiber optic connections, a Tx to Rx connection is required The UR-series C37.94 communication module can be connected directly to any compliant digital multiplexer that supports the IEEE C37.94 standard as shown below. 3-34 L90 Line Current Differential System GE Multilin...
  • Page 103 Once the clips have cleared the raised edge of the chassis, engage the clips simultaneously. When the clips have locked into position, the module is fully inserted. GE Multilin L90 Line Current Differential System...
  • Page 104 3.3 PILOT CHANNEL COMMUNICATIONS 3 HARDWARE Figure 3–41: IEEE C37.94 TIMING SELECTION SWITCH SETTING 3-36 L90 Line Current Differential System GE Multilin...
  • Page 105 Solid yellow — FPGA is receiving a "yellow bit" and remains yellow for each "yellow bit" • Solid red — FPGA is not receiving a valid packet or the packet received is invalid GE Multilin L90 Line Current Differential System 3-37...
  • Page 106: C37.94sm Interface

    For the internal timing mode, the system clock is generated internally. Therefore, the timing switch selection should be internal timing for relay 1 and loop timed for relay 2. There must be only one timing source configured. 3-38 L90 Line Current Differential System GE Multilin...
  • Page 107 Once the clips have cleared the raised edge of the chassis, engage the clips simultaneously. When the clips have locked into position, the module is fully inserted. Figure 3–43: C37.94SM TIMING SELECTION SWITCH SETTING GE Multilin L90 Line Current Differential System 3-39...
  • Page 108 Solid yellow — FPGA is receiving a "yellow bit" and remains yellow for each "yellow bit" • Solid red — FPGA is not receiving a valid packet or the packet received is invalid 3-40 L90 Line Current Differential System GE Multilin...
  • Page 109: Human Interfaces

    Factory default values are supplied and can be restored after any changes. The following communications settings are not transferred to the L90 with settings files. Modbus Slave Address Modbus IP Port Number RS485 COM2 Baud Rate RS485 COM2 Parity COM2 Minimum Response Time GE Multilin L90 Line Current Differential System...
  • Page 110 EEPROM DATA ERROR message intended to inform users that the Modbus addresses have changed with the upgraded firmware. This message does not signal any problems when appearing after firmware upgrades. L90 Line Current Differential System GE Multilin...
  • Page 111: Enervista Ur Setup Main Window

    Device data view windows, with common tool bar Settings file data view windows, with common tool bar Workspace area with data view tabs Status bar 10. Quick action hot links 842786A2.CDR Figure 4–1: ENERVISTA UR SETUP SOFTWARE MAIN WINDOW GE Multilin L90 Line Current Differential System...
  • Page 112: Extended Enervista Ur Setup Features

    Select the Template Mode > Edit Template option to place the device in template editing mode. Enter the template password then click OK. Open the relevant settings windows that contain settings to be specified as viewable. L90 Line Current Differential System GE Multilin...
  • Page 113 The following procedure describes how to add password protection to a settings file template. Select a settings file from the offline window on the left of the EnerVista UR Setup main screen. Selecting the Template Mode > Password Protect Template option. GE Multilin L90 Line Current Differential System...
  • Page 114 Template Mode > View In Template Mode command. The template specifies that only the Pickup Curve Phase time overcurrent settings window without template applied. settings be available. 842858A1.CDR Figure 4–4: APPLYING TEMPLATES VIA THE VIEW IN TEMPLATE MODE COMMAND L90 Line Current Differential System GE Multilin...
  • Page 115 Select an installed device or settings file from the tree menu on the left of the EnerVista UR Setup main screen. Select the Template Mode > Remove Settings Template option. Enter the template password and click OK to continue. GE Multilin L90 Line Current Differential System...
  • Page 116: Securing And Locking Flexlogic Equations

    Click on Save to save and apply changes to the settings template. Select the Template Mode > View In Template Mode option to view the template. Apply a password to the template then click OK to secure the FlexLogic equation. L90 Line Current Differential System GE Multilin...
  • Page 117 FlexLogic entries in a settings file have been secured, use the following procedure to lock the settings file to a specific serial number. Select the settings file in the offline window. Right-click on the file and select the Edit Settings File Properties item. GE Multilin L90 Line Current Differential System...
  • Page 118: Settings File Traceability

    L90 device. Any partial settings transfers by way of drag and drop do not add the traceability information to the settings file. Figure 4–11: SETTINGS FILE TRACEABILITY MECHANISM With respect to the above diagram, the traceability feature is used as follows. 4-10 L90 Line Current Differential System GE Multilin...
  • Page 119 Figure 4–12: DEVICE DEFINITION SHOWING TRACEABILITY DATA This information is also available in printed settings file reports as shown in the example below. Traceability data in settings report 842862A1.CDR Figure 4–13: SETTINGS FILE REPORT SHOWING TRACEABILITY DATA GE Multilin L90 Line Current Differential System 4-11...
  • Page 120 If the user converts an existing settings file to another revision, then any existing traceability information is removed from the settings file. • If the user duplicates an existing settings file, then any traceability information is transferred to the duplicate settings file. 4-12 L90 Line Current Differential System GE Multilin...
  • Page 121: Faceplate Interface

    LED panel 2 LED panel 3 Display Front panel RS232 port Small user-programmable User-programmable Keypad (control) pushbuttons 1 to 7 pushbuttons 1 to 12 827801A . Figure 4–16: UR-SERIES STANDARD HORIZONTAL FACEPLATE PANELS GE Multilin L90 Line Current Differential System 4-13...
  • Page 122: Led Indicators

    The status indicators in the first column are described below. • IN SERVICE: This LED indicates that control power is applied, all monitored inputs, outputs, and internal systems are OK, and that the device has been programmed. 4-14 L90 Line Current Differential System GE Multilin...
  • Page 123 IN SERVICE VOLTAGE TROUBLE CURRENT RESET TEST MODE FREQUENCY TRIP OTHER USER 1 ALARM PHASE A PICKUP USER 2 PHASE B PHASE C NEUTRAL/GROUND USER 3 842781A1.CDR Figure 4–19: LED PANEL 1 GE Multilin L90 Line Current Differential System 4-15...
  • Page 124 LEDs on these panels. USER-PROGRAMMABLE LEDS USER-PROGRAMMABLE LEDS 842782A1.CDR Figure 4–20: LED PANELS 2 AND 3 (INDEX TEMPLATE) DEFAULT LABELS FOR LED PANEL 2: The default labels are intended to represent: 4-16 L90 Line Current Differential System GE Multilin...
  • Page 125: Custom Labeling Of Leds

    EnerVista UR Setup software is installed and operational • The L90 settings have been saved to a settings file • The L90 front panel label cutout sheet (GE Multilin part number 1006-0047) has been downloaded from http://www.gedigitalenergy.com/products/support/ur/URLEDenhanced.doc and printed •...
  • Page 126 Remove the L90 label insert tool from the package and bend the tabs as described in the following procedures. These tabs are used for removal of the default and custom LED labels. It is important that the tool be used EXACTLY as shown below, with the printed side containing the GE part number facing the user.
  • Page 127 Use the knife to lift the LED label and slide the label tool underneath. Make sure the bent tabs are pointing away from the relay. Slide the label tool under the LED label until the tabs snap out as shown below. This attaches the label tool to the LED label. GE Multilin L90 Line Current Differential System 4-19...
  • Page 128 Use the knife to lift the pushbutton label and slide the tail of the label tool underneath, as shown below. Make sure the bent tab is pointing away from the relay. 4-20 L90 Line Current Differential System GE Multilin...
  • Page 129 Slide the label tool under the user-programmable pushbutton label until the tabs snap out as shown below. This attaches the label tool to the user-programmable pushbutton label. Remove the tool and attached user-programmable pushbutton label as shown below. GE Multilin L90 Line Current Differential System 4-21...
  • Page 130 The panel templates provide relative LED locations and located example text (x) edit boxes. The following procedure demonstrates how to install/uninstall the custom panel labeling. Remove the clear Lexan Front Cover (GE Multilin part number: 1501-0014). Push in...
  • Page 131: Display

    Microsoft Word 97 or later software for editing the template • 1 each of: 8.5" x 11" white paper, exacto knife, ruler, custom display module (GE Multilin Part Number: 1516-0069), and a custom module cover (GE Multilin Part Number: 1502-0015) The following procedure describes how to customize the L90 display module: Open the LED panel customization template with Microsoft Word.
  • Page 132: Menus

    Each press of the MENU key advances through the following main heading pages: • Actual values • Settings • Commands • Targets • User displays (when enabled) 4-24 L90 Line Current Differential System GE Multilin...
  • Page 133 Properties. TIME: 1.0 s  To view the remaining settings associated with the Display Properties subheader, DEFAULT MESSAGE repeatedly press the MESSAGE DOWN key. The last message appears as shown. INTENSITY: 25% GE Multilin L90 Line Current Differential System 4-25...
  • Page 134: Changing Settings

    ENTERING ALPHANUMERIC TEXT Text settings have data values which are fixed in length, but user-defined in character. They can be upper case letters, lower case letters, numerals, and a selection of special characters. 4-26 L90 Line Current Differential System GE Multilin...
  • Page 135: Settings

    When the "NEW SETTING HAS BEEN STORED" message appears, the relay is in "Programmed" state and the In Service LED turns on. e) ENTERING INITIAL PASSWORDS The L90 supports password entry from a local or remote connection. GE Multilin L90 Line Current Differential System 4-27...
  • Page 136 FlexLogic operand is set to “On” and the L90 does not allow settings or command LOCAL ACCESS DENIED level access via the faceplate interface for the next five minutes, or in the event that an incorrect Command Or Setting 4-28 L90 Line Current Differential System GE Multilin...
  • Page 137 L90 does not allow Settings or Command access via the any external communications interface for the next ten minutes. FlexLogic operand is set to “Off” after the expiration of the ten-minute timeout. REMOTE ACCESS DENIED GE Multilin L90 Line Current Differential System 4-29...
  • Page 138 4.3 FACEPLATE INTERFACE 4 HUMAN INTERFACES 4-30 L90 Line Current Differential System GE Multilin...
  • Page 139: Overview

     SETTINGS  AC INPUTS See page 5-79.  SYSTEM SETUP   POWER SYSTEM See page 5-80.   SIGNAL SOURCES See page 5-81.   87L POWER SYSTEM See page 5-84.  GE Multilin L90 Line Current Differential System...
  • Page 140  UNDERFREQUENCY See page 5-261.   OVERFREQUENCY See page 5-262.   FREQUENCY RATE See page 5-263.  OF CHANGE  SYNCHROCHECK See page 5-265.   DIGITAL ELEMENTS See page 5-269.  L90 Line Current Differential System GE Multilin...
  • Page 141  DCMA INPUTS See page 5-348.  TRANSDUCER I/O   RTD INPUTS See page 5-349.   DCMA OUTPUTS See page 5-351.   SETTINGS TEST MODE See page 5-354.  TESTING FUNCTION: Disabled GE Multilin L90 Line Current Differential System...
  • Page 142: Introduction To Elements

    For wye-connected VTs, the secondary nominal voltage (1 pu) would be: 13800 --------------- -  --------- - 66.4 V (EQ 5.2) 14400 Many settings are common to most elements and are discussed below: L90 Line Current Differential System GE Multilin...
  • Page 143: Introduction To Ac Sources

    A given source may contain all or some of the following signals: three-phase currents, single-phase ground current, three-phase voltages and an auxiliary voltages from a single-phase VT for checking for synchronism. GE Multilin L90 Line Current Differential System...
  • Page 144 The CT/VT modules calculate total waveform RMS levels, fundamental frequency phasors, symmetrical components and harmonics for voltage or current, as allowed by the hardware in each channel. These modules may calculate other parameters as directed by the CPU module. L90 Line Current Differential System GE Multilin...
  • Page 145 CTs on each of two breakers is required to measure the winding current flow. GE Multilin L90 Line Current Differential System...
  • Page 146: Product Setup

    “0”, the password security feature is disabled. As shown in the figures, the window indicates when the password is at the default and when the password has been set. Figure 5–2: WINDOW INDICATES DEFAULT PASSWORD (LEFT) AND PASSWORD SET (RIGHT) The L90 supports password entry from a local or remote connection. L90 Line Current Differential System GE Multilin...
  • Page 147 Accessibility automatically reverts to the “Restricted” level according to the access level timeout setting values. If an entered password is lost (or forgotten), consult the factory with the corresponding ENCRYPTED PASSWORD GE Multilin L90 Line Current Differential System...
  • Page 148 PASSWORD LOCKOUT DURATION: This setting specifies the time that the L90 will lockout password access after the number of invalid password entries specified by the setting has occurred. INVALID ATTEMPTS BEFORE LOCKOUT 5-10 L90 Line Current Differential System GE Multilin...
  • Page 149 ACCESS AUTH TIMEOUT: This setting represents the timeout delay for local setting access. This setting is applicable when the setting is programmed to any operand except “On”. The state of the FlexLogic operand LOCAL SETTING AUTH GE Multilin L90 Line Current Differential System 5-11...
  • Page 150: Cybersentry Security

    The choice of authentication type (server versus device) and the capacity to configure server parameters are available only in the EnerVista software. 5-12 L90 Line Current Differential System GE Multilin...
  • Page 151 UR device for successful authentication, and the shortname is a short, optional alias that can be used in place of the IP address. client 10.0.0.2/24 { secret = testing123 shortname = private-network-1 e. In the <Path_to_Radius>\etc\raddb folder, create a file called dictionary.ge and add the following content. # ########################################################## GE VSAs ############################################################ VENDOR...
  • Page 152 Set up the RADIUS client on the UR as follows. Access Device > Settings > Product Setup > Security. Configure the IP address and ports for the RADIUS server. Leave the GE vendor ID field at the default of 2910. Update the RADIUS shared secret as specified in the CLIENTS.CONF file.
  • Page 153 PRODUCT SETUP SECURITY SESSION SETTINGS Range: 0 to 99  SESSION SESSION LOCKOUT:  SETTINGS Range: 0 to 9999 minutes SESSION LOCKOUT MESSAGE PERIOD: 3 min The following session settings are available. GE Multilin L90 Line Current Differential System 5-15...
  • Page 154 No passwords for allowed RBAC levels No SSH tunneling The bypass options are as follows: • Local — Bypasses authentication for push buttons, keypad, RS232, and RS485 • Remote — Bypasses authentication for Ethernet 5-16 L90 Line Current Differential System GE Multilin...
  • Page 155 Settings Lock: If this setting is Enabled then an unauthorized write attempt to a setting for a given role activates this self test.      PATH: SETTINGS PRODUCT SETUP SECURITY SUPERVISORY SELF TESTS FAILED AUTHENTICATE Range: Enabled, Disabled  FAILED FAILED AUTHENTICATE:  AUTHENTICATE Enabled GE Multilin L90 Line Current Differential System 5-17...
  • Page 156: Display Properties

    The L90 applies a cut-off value to the magnitudes and angles of the measured voltages. If the magnitude is below the cut-off level, it is substituted with zero. This operation applies to phase and auxiliary voltages, and symmetrical 5-18 L90 Line Current Differential System GE Multilin...
  • Page 157: Clear Relay Records

    CLEAR EVENT RECORDS: MESSAGE Range: FlexLogic operand CLEAR OSCILLOGRAPHY? MESSAGE Range: FlexLogic operand CLEAR DATA LOGGER: MESSAGE Range: FlexLogic operand CLEAR ARC AMPS 1: MESSAGE Range: FlexLogic operand CLEAR ARC AMPS 2: MESSAGE GE Multilin L90 Line Current Differential System 5-19...
  • Page 158 Set the properties for user-programmable pushbutton 1 by making the following changes in the  SETTINGS PRODUCT   menu: SETUP USER-PROGRAMMABLE PUSHBUTTONS USER PUSHBUTTON 1 “Self-reset” PUSHBUTTON 1 FUNCTION: “0.20 s” PUSHBTN 1 DROP-OUT TIME: 5-20 L90 Line Current Differential System GE Multilin...
  • Page 159: Communications

    When using more than one Ethernet port, configure each to belong to a different network or subnet using the IP addresses and mask, else communication becomes unpredictable when more than one port is configured to the same subnet. GE Multilin L90 Line Current Differential System...
  • Page 160 The topology shown in the following figure allows communications to SCADA, local configuration/monitoring through EnerVista, and access to the public network shared on the same LAN. No redundancy is provided. Figure 5–3: NETWORK CONFIGURATION FOR SINGLE LAN 5-22 L90 Line Current Differential System GE Multilin...
  • Page 161 LAN2, to which port 2 (P2) is connected and communications with SCADA on LAN3, to which port 3 (P3) is connected. There is no redundancy. Figure 5–5: MULTIPLE LANS, NO REDUNDANCY GE Multilin L90 Line Current Differential System 5-23...
  • Page 162 Failover, the operation of ports 2 and 3 is as follows: • Ports 2 and 3 use the port 2 MAC address, IP address, and mask • The configuration fields for IP address and mask on port 3 are hidden 5-24 L90 Line Current Differential System GE Multilin...
  • Page 163 There is a second type of specialized device used in PRP networks, called RedBox, with the role of connecting Single Attached Nodes (SANs) to a redundant network. UR relays implement only the DANP functionality. The RedBox functionality is not implemented. GE Multilin L90 Line Current Differential System 5-25...
  • Page 164 1 to 6, that entry becomes a static route and it must meet all the rules listed in the next section, General Conditions to be Satisfied by Static Routes. 5-26 L90 Line Current Differential System GE Multilin...
  • Page 165 Port 2 (IP address 10.1.2.2) connects the UR to LAN 10.1.2.0/24 and to the EnerVista software through Router 2. Router 2 has an interface on 10.1.2.0/24 and the IP address of this interface is 10.1.2.1. The configuration before release 7.10 was as follows: GE Multilin L90 Line Current Differential System 5-27...
  • Page 166 COMMUNICATIONS MODBUS PROTOCOL Range: 0 to 254 in steps of 1  MODBUS PROTOCOL MODBUS SLAVE  ADDRESS: 254 Range: 0 to 65535 in steps of 1 MODBUS TCP PORT MESSAGE NUMBER: 5-28 L90 Line Current Differential System GE Multilin...
  • Page 167 MESSAGE 100000 FACTOR: 1 Range: 0 to 100000000 in steps of 1 DNP CURRENT DEFAULT MESSAGE DEADBAND: 30000 Range: 0 to 100000000 in steps of 1 DNP VOLTAGE DEFAULT MESSAGE DEADBAND: 30000 GE Multilin L90 Line Current Differential System 5-29...
  • Page 168 FRONT PANEL - RS232, NETWORK - TCP,  NETWORK NETWORK - UDP Range: NONE, COM2 - RS485, DNP CHANNEL 2 PORT: MESSAGE FRONT PANEL - RS232, NETWORK - TCP, COM2 - RS485 NETWORK - UDP 5-30 L90 Line Current Differential System GE Multilin...
  • Page 169 “DNP Points Lists” L90 web page to view the points lists. This page can be viewed with a web browser by enter- NOTE ing the L90 IP address to access the L90 “Main Menu”, then by selecting the “Device Information Menu” > “DNP Points Lists” menu item. GE Multilin L90 Line Current Differential System 5-31...
  • Page 170 FlexLogic operand. Refer to the Introduction to FlexLogic section in this chapter for the full range of assignable operands. The menu for the analog input points (DNP) or MME points (IEC 60870-5-104) is shown below. 5-32 L90 Line Current Differential System GE Multilin...
  • Page 171 The L90 Line Current Differential System is provided with optional IEC 61850 communications capability. This feature is specified as a software option at the time of ordering. Refer to the Ordering section of chap- ter 2 for additional details. GE Multilin L90 Line Current Differential System 5-33...
  • Page 172 IEC 61850 GSSE application ID name string sent as part of each GSSE message. This GSSE ID string identifies the GSSE message to the receiving device. In L90 releases previous to 5.0x, this name string was repre- sented by the setting. RELAY NAME 5-34 L90 Line Current Differential System GE Multilin...
  • Page 173 ID for each GOOSE sending device. This value can be left at its default if the feature is not required. Both the GOOSE VLAN settings are required by IEC 61850. PRIORITY GOOSE ETYPE APPID GE Multilin L90 Line Current Differential System 5-35...
  • Page 174 The aggressive scheme is only supported in fast type 1A GOOSE messages (GOOSEOut 1 and GOOSEOut 2). For slow GOOSE messages (GOOSEOut 3 to GOOSEOut 8) the aggressive scheme is the same as the medium scheme. 5-36 L90 Line Current Differential System GE Multilin...
  • Page 175 Configure the transmission dataset. Configure the GOOSE service settings. Configure the data. The general steps required for reception configuration are: Configure the reception dataset. Configure the GOOSE service settings. Configure the data. GE Multilin L90 Line Current Differential System 5-37...
  • Page 176 Configure the GOOSE service settings by making the following changes in the  INPUTS/OUTPUTS REMOTE DEVICES  settings menu: REMOTE DEVICE 1 – to match the GOOSE ID string for the transmitting device. Enter “GOOSEOut_1”. REMOTE DEVICE 1 ID 5-38 L90 Line Current Differential System GE Multilin...
  • Page 177 The status value for GGIO1.ST.Ind1.stVal is determined by the FlexLogic operand assigned to GGIO1 indication 1. Changes to this operand will result in the transmission of GOOSE messages con- taining the defined dataset. GE Multilin L90 Line Current Differential System 5-39...
  • Page 178 Received values are used to populate the GGIO3.MX.AnIn1 and higher items. Received values are also available as FlexAnalog parameters (GOOSE analog In1 and up). GGIO3.MX.AnIn1 to GGIO3.MX.AnIn32 can only be used once for all sixteen reception datasets. NOTE 5-40 L90 Line Current Differential System GE Multilin...
  • Page 179 L90. Clients are still able to connect to the server (L90 relay), but most data values are not updated. This set- ting does not affect GOOSE/GSSE operation. Changes to the setting, setting, and GOOSE dataset take effect when the L90 is restarted. IED NAME LD INST NOTE GE Multilin L90 Line Current Differential System 5-41...
  • Page 180 275  VT ratio setting • power (real, reactive, and apparent): 46  phase CT primary setting  275  VT ratio setting • • frequency: 90 Hz • power factor: 2 5-42 L90 Line Current Differential System GE Multilin...
  • Page 181 GGIO4. When this value is NUMBER OF ANALOG POINTS changed, the L90 must be rebooted in order to allow the GGIO4 logical node to be re-instantiated and contain the newly configured number of analog points. GE Multilin L90 Line Current Differential System 5-43...
  • Page 182 GGIO5 integer inputs. The following setting is available for all GGIO5 configuration points. • GGIO5 UINT IN 1 VALUE: This setting selects the FlexInteger value to drive each GGIO5 integer status value (GGIO5.ST.UIntIn1). This setting is stored as an 32-bit unsigned integer value. 5-44 L90 Line Current Differential System GE Multilin...
  • Page 183 LLN0 if a user needs some (but not all) data from already existing GGIO1, GGIO4, and MMXU4 points and their quantity is not greater than 64 minus the number items in this dataset. GE Multilin L90 Line Current Differential System...
  • Page 184 XCBR operating counter status attribute (OpCnt) increments with every operation. Frequent breaker operation can result in very large OpCnt values over time. This setting allows the OpCnt to be reset to “0” for XCBR1. 5-46 L90 Line Current Differential System GE Multilin...
  • Page 185 Since GSSE/GOOSE messages are multicast Ethernet by specification, they will not usually be forwarded by net- work routers. However, GOOSE messages may be forwarded by routers if the router has been configured for VLAN functionality. NOTE GE Multilin L90 Line Current Differential System 5-47...
  • Page 186 L90 contains a list and description of all available files (event records, oscillography, etc.). When the is set to 0, the change takes effect when the L90 is restarted. TFTP MAIN UDP PORT NUMBER NOTE 5-48 L90 Line Current Differential System GE Multilin...
  • Page 187 The IEC 60870-5-104 and DNP protocols cannot be used simultaneously. When the IEC 60870-5-104 FUNCTION setting is set to “Enabled”, the DNP protocol does not operate. When this setting is changed, it takes effect when power to the relay is cycled (off-to-on). NOTE GE Multilin L90 Line Current Differential System 5-49...
  • Page 188: Modbus User Map

     REAL TIME SYNCRONIZING SOURCE: SNTP, PP/PTP/IRIG-B/SNTP  CLOCK None  PRECISION TIME See below MESSAGE  PROTOCOL (1588)  SNTP PROTOCOL See below MESSAGE   LOCAL TIME See below MESSAGE  5-50 L90 Line Current Differential System GE Multilin...
  • Page 189 None. To configure and enable PTP and/or SNTP, or to set local time parameters (for example time zone, daylight savings), use the following sections. Precision Time Protocol (1588) GE Multilin L90 Line Current Differential System 5-51...
  • Page 190 PP, the associated propagation delay and/or latency may not be compensated for, and the time received at the end-device could be in error by more than 100 µs. 5-52 L90 Line Current Differential System GE Multilin...
  • Page 191 Depending on the characteristics of the device to which the relay is directly linked, VLAN Priority may have no effect. • This setting applies to all of the relay’s PTP capable ports. GE Multilin L90 Line Current Differential System 5-53...
  • Page 192 123 for normal SNTP operation. If SNTP is not required, close the port by setting it to 0. SNTP UDP PORT NUMBER When the is set to 0, the change takes effect when the L90 is restarted. SNTP UDP PORT NUMBER NOTE 5-54 L90 Line Current Differential System GE Multilin...
  • Page 193 DAYLIGHT SAVINGS TIME (DST) Note that when IRIG-B time synchronization is active, the local time in the IRIG-B signal contains any daylight savings time offset and so the DST settings are ignored. GE Multilin L90 Line Current Differential System 5-55...
  • Page 194 5-56 L90 Line Current Differential System GE Multilin...
  • Page 195 FAULT 1 REPORT TRIG operational fault location calculations. The distance to fault calculations are initiated by this signal. The FAULT REPORT 1 Z1 impedances are entered in secondary ohms. FAULT REPORT 1 Z0 MAG GE Multilin L90 Line Current Differential System 5-57...
  • Page 196: Oscillography

    TRIGGER POSITION: MESSAGE Range: FlexLogic operand TRIGGER SOURCE: MESSAGE Range: Off; 8, 16, 32, 64 samples/cycle AC INPUT WAVEFORMS: MESSAGE 16 samples/cycle  DIGITAL CHANNELS MESSAGE   ANALOG CHANNELS MESSAGE  5-58 L90 Line Current Differential System GE Multilin...
  • Page 197 FlexLogic operand state recorded in an oscillography trace. The length of each DIGITAL 1(63) CHANNEL oscillography trace depends in part on the number of parameters selected here. Parameters set to “Off” are ignored. Upon startup, the relay will automatically prepare the parameter list. GE Multilin L90 Line Current Differential System 5-59...
  • Page 198 IB signal on terminal 2 of the CT/VT module in slot F. If there are no CT/VT modules and analog input modules, no analog traces will appear in the file; only the digital traces will appear. 5-60 L90 Line Current Differential System GE Multilin...
  • Page 199: Data Logger

    436380 s 254460 s 3600000 ms 2727.5 235645200 s 340.9 29455200 s 26182800 s Changing any setting affecting data logger operation will clear any data that is currently in the log. NOTE GE Multilin L90 Line Current Differential System 5-61...
  • Page 200: Demand

    D 1 e (EQ 5.6) – where: d = demand value after applying input quantity for time t (in minutes) D = input quantity (constant), and k = 2.3 / thermal 90% response time. 5-62 L90 Line Current Differential System GE Multilin...
  • Page 201  LEDS   TRIP & ALARM LEDS See page 5–66. MESSAGE   USER-PROGRAMMABLE See page 5–66. MESSAGE  LED1  USER-PROGRAMMABLE MESSAGE  LED2   USER-PROGRAMMABLE MESSAGE  LED48 GE Multilin L90 Line Current Differential System 5-63...
  • Page 202 The test responds to the position and rising edges of the control input defined by the set- LED TEST CONTROL ting. The control pulses must last at least 250 ms to take effect. The following diagram explains how the test is executed. 5-64 L90 Line Current Differential System GE Multilin...
  • Page 203 2. Once stage 2 has started, the pushbutton can be released. When stage 2 is completed, stage 3 will automatically start. The test may be aborted at any time by pressing the pushbutton. GE Multilin L90 Line Current Differential System...
  • Page 204: User-programmable Leds

    AR ENABLED LED 10 operand BREAKER 1 CLOSED LED 22 operand AR DISABLED LED 11 operand BREAKER 1 TROUBLE LED 23 operand AR RIP LED 12 operand LED 24 operand AR LO 5-66 L90 Line Current Differential System GE Multilin...
  • Page 205: User-programmable Self-tests

    Firmware revisions 3.2x and older use these three pushbuttons for manual breaker control. This functionality has been retained – if the breaker control feature is configured to use the three pushbuttons, they cannot be used as user-program- mable control pushbuttons. GE Multilin L90 Line Current Differential System 5-67...
  • Page 206 SYSTEM SETUP/ BREAKERS/BREAKER 1/ BREAKER 1 PUSHBUTTON CONTROL Enabled=1 TIMER FLEXLOGIC OPERAND SYSTEM SETUP/ BREAKERS/BREAKER 2/ CONTROL PUSHBTN 1 ON 100 msec BREAKER 2 PUSHBUTTON CONTROL 842010A2.CDR Enabled=1 Figure 5–12: CONTROL PUSHBUTTON LOGIC 5-68 L90 Line Current Differential System GE Multilin...
  • Page 207: User-programmable Pushbuttons

    FlexLogic equations, protection elements, and control elements. Typical applications include breaker control, autorecloser blocking, and setting groups changes. The user-programmable pushbuttons are under the control level of password protection. The user-configurable pushbuttons for the enhanced faceplate are shown below. GE Multilin L90 Line Current Differential System 5-69...
  • Page 208 The pulse duration of the remote set, remote reset, or local pushbutton must be at least 50 ms to operate the push- button. This allows the user-programmable pushbuttons to properly operate during power cycling events and vari- ous system disturbances that may cause transient assertion of the operating signals. NOTE 5-70 L90 Line Current Differential System GE Multilin...
  • Page 209 PUSHBTN 1 RESET • PUSHBTN 1 LOCAL: This setting assigns the FlexLogic operand serving to inhibit pushbutton operation from the front panel pushbuttons. This locking functionality is not applicable to pushbutton autoreset. GE Multilin L90 Line Current Differential System 5-71...
  • Page 210 “Normal” if the setting is “High Priority” or “Normal”. PUSHBTN 1 MESSAGE • PUSHBUTTON 1 EVENTS: If this setting is enabled, each pushbutton state change will be logged as an event into event recorder. 5-72 L90 Line Current Differential System GE Multilin...
  • Page 211 Off = 0 SETTING SETTING Autoreset Delay Autoreset Function = Enabled = Disabled SETTING Drop-Out Timer TIMER FLEXLOGIC OPERAND 200 ms PUSHBUTTON 1 ON 842021A3.CDR Figure 5–15: USER-PROGRAMMABLE PUSHBUTTON LOGIC (Sheet 1 of 2) GE Multilin L90 Line Current Differential System 5-73...
  • Page 212: Flex State Parameters

    PATH: SETTINGS PRODUCT SETUP FLEX STATE PARAMETERS Range: FlexLogic operand  FLEX STATE PARAMETER  PARAMETERS Range: FlexLogic operand PARAMETER MESSAGE Range: FlexLogic operand PARAMETER MESSAGE  Range: FlexLogic operand PARAMETER 256: MESSAGE 5-74 L90 Line Current Differential System GE Multilin...
  • Page 213: User-definable Displays

    INVOKE AND SCROLL play, not at the first user-defined display. The pulses must last for at least 250 ms to take effect. INVOKE AND SCROLL GE Multilin L90 Line Current Differential System 5-75...
  • Page 214 While viewing a user display, press the ENTER key and then select the ‘Yes” option to remove the display from the user display list. Use the MENU key again to exit the user displays menu. 5-76 L90 Line Current Differential System GE Multilin...
  • Page 215: Installation

    "Programmed" state. UNIT NOT PROGRAMMED setting allows the user to uniquely identify a relay. This name will appear on generated reports. RELAY NAME GE Multilin L90 Line Current Differential System 5-77...
  • Page 216: Remote Resources Configuration

    Configure shared inputs and outputs as required for the application's functionality. Shared inputs and outputs are dis- tinct binary channels that provide high-speed protection quality signaling between relays through a Brick. For additional information on how to configure a relay with a process bus module, see GE publication number GEK-113658: HardFiber Process Bus System Instruction Manual.
  • Page 217: System Setup

    1000:1 CT before summation. If a protection element is set up to act on SRC 1 currents, then a pickup level of 1 pu will operate on 1000 A primary. The same rule applies for current sums from CTs with different secondary taps (5 A and 1 A). GE Multilin L90 Line Current Differential System 5-79...
  • Page 218: Power System

    5-80 L90 Line Current Differential System GE Multilin...
  • Page 219: Signal Sources

    (1, 2, 3, 4) called “1” or the second bank of four channels (5, 6, 7, 8) called “5” in a particular CT/VT module. Refer to the Introduction to AC sources section at the beginning of this chapter for additional details on this concept. GE Multilin L90 Line Current Differential System 5-81...
  • Page 220 0.02 pu; thus by default the disturbance detector responds to a change of 0.04 pu. The metering sensitivity setting ( PROD-   ) controls the sensitivity of the disturbance detector UCT SETUP DISPLAY PROPERTIES CURRENT CUT-OFF LEVEL accordingly. 5-82 L90 Line Current Differential System GE Multilin...
  • Page 221 Figure 5–19: EXAMPLE USE OF SOURCES Y LV D HV SRC 1 SRC 2 SRC 3 Phase CT F1+F5 None Ground CT None None Phase VT None None Aux VT None None GE Multilin L90 Line Current Differential System 5-83...
  • Page 222: Power System

    The voltage signals used for charging current compensation are taken from the source assigned with the setting. As such, it's critical to ensure that three-phase line voltage is CURRENT DIFF SIGNAL SOURCE 1 assigned to this source. The following diagram shows possible configurations. 5-84 L90 Line Current Differential System GE Multilin...
  • Page 223 The effect of charging current compensation is viewed in the METERING  actual values menu. This effect is very dependent on CT and VT accuracy. NOTE 87L DIFFERENTIAL CURRENT GE Multilin L90 Line Current Differential System 5-85...
  • Page 224 L90 via an input contact. In the case of GPS receiver fail, the channel compensation function can be effectively disabled by using the input contact in conjunction with the (GPS) setting. BLOCK GPS TIME REF 5-86 L90 Line Current Differential System GE Multilin...
  • Page 225 250 µs, or accuracy less than 250 µs, or unknown accuracy/error (that is, not locked to an international time standard). Apply 2 security counts (2 seconds) to both set and reset of this operand when change is based on accuracy. There is no corresponding quality test for IRIG-B sources here. GE Multilin L90 Line Current Differential System 5-87...
  • Page 226 IN-ZONE TRANSFORMER CONNECTION: This setting is used to indicate the presence and group connection of the in-zone transformer. The winding angle selection specifies the phase shift of the remote terminal side winding with 5-88 L90 Line Current Differential System GE Multilin...
  • Page 227 When the L90 ordered has in-zone functionality, it does not support the multi-ended fault locator. Do not set the setting to "None" at one terminal and set other terminals to a IN-ZONE TRANSFORMER CONNECTION NOTE value other than "None." 87L is blocked under these circumstances. GE Multilin L90 Line Current Differential System 5-89...
  • Page 228: Breakers

    Range: 0.000 to 65.535 s in steps of 0.001 MANUAL CLOSE RECAL1 MESSAGE TIME: 0.000 s Range: FlexLogic operand BREAKER 1 OUT OF SV: MESSAGE Range: Disabled, Enabled BREAKER 1 EVENTS: MESSAGE Disabled 5-90 L90 Line Current Differential System GE Multilin...
  • Page 229 MANUAL CLOSE RECAL1 TIME: This setting specifies the interval required to maintain setting changes in effect after an operator has initiated a manual close command to operate a circuit breaker. • BREAKER 1 OUT OF SV: Selects an operand indicating that breaker 1 is out-of-service. GE Multilin L90 Line Current Differential System 5-91...
  • Page 230 5 SETTINGS Figure 5–23: DUAL BREAKER CONTROL SCHEME LOGIC (Sheet 1 of 2) IEC 61850 functionality is permitted when the L90 is in “Programmed” mode and not in the local control mode. NOTE 5-92 L90 Line Current Differential System GE Multilin...
  • Page 231 Note that IEC 61850 commands are event-driven and dwell time for these is one protection pass only. If you want to main- tain the close/open command for a certain time, do so either on the contact outputs using the "Seal-in" setting or in Flex- Logic. GE Multilin L90 Line Current Differential System 5-93...
  • Page 232: Disconnect Switches

    • SWITCH 1 MODE: This setting selects “3-Pole” mode, where disconnect switch poles have a single common auxiliary switch, or “1-Pole” mode where each disconnect switch pole has its own auxiliary switch. 5-94 L90 Line Current Differential System GE Multilin...
  • Page 233 This allows for non-simultaneous operation of the poles. IEC 61850 functionality is permitted when the L90 is in “Programmed” mode and not in the local control mode. NOTE GE Multilin L90 Line Current Differential System 5-95...
  • Page 234 5.4 SYSTEM SETUP 5 SETTINGS Figure 5–25: DISCONNECT SWITCH SCHEME LOGIC 5-96 L90 Line Current Differential System GE Multilin...
  • Page 235: Flexcurves

    15.0 0.48 0.88 15.5 0.50 0.90 16.0 0.52 0.91 16.5 0.54 0.92 17.0 0.56 0.93 17.5 0.58 0.94 18.0 0.60 0.95 18.5 0.62 0.96 19.0 0.64 0.97 19.5 0.66 0.98 10.0 20.0 GE Multilin L90 Line Current Differential System 5-97...
  • Page 236 The multiplier and adder settings only affect the curve portion of the characteristic and not the MRT and HCT set- tings. The HCT settings override the MRT settings for multiples of pickup greater than the HCT ratio. NOTE 5-98 L90 Line Current Differential System GE Multilin...
  • Page 237 EnerVista UR Setup software generates an error message and discards the proposed changes. NOTE e) STANDARD RECLOSER CURVES The standard recloser curves available for the L90 are displayed in the following graphs. GE Multilin L90 Line Current Differential System 5-99...
  • Page 238 842723A1.CDR Figure 5–29: RECLOSER CURVES GE101 TO GE106 GE142 GE138 GE120 GE113 0.05 7 8 9 10 12 CURRENT (multiple of pickup) 842725A1.CDR Figure 5–30: RECLOSER CURVES GE113, GE120, GE138 AND GE142 5-100 L90 Line Current Differential System GE Multilin...
  • Page 239 Figure 5–31: RECLOSER CURVES GE134, GE137, GE140, GE151 AND GE201 GE152 GE141 GE131 GE200 7 8 9 10 12 CURRENT (multiple of pickup) 842728A1.CDR Figure 5–32: RECLOSER CURVES GE131, GE141, GE152, AND GE200 GE Multilin L90 Line Current Differential System 5-101...
  • Page 240 Figure 5–33: RECLOSER CURVES GE133, GE161, GE162, GE163, GE164 AND GE165 GE132 GE139 GE136 GE116 0.05 GE117 GE118 0.02 0.01 7 8 9 10 12 CURRENT (multiple of pickup) 842726A1.CDR Figure 5–34: RECLOSER CURVES GE116, GE117, GE118, GE132, GE136, AND GE139 5-102 L90 Line Current Differential System GE Multilin...
  • Page 241 Figure 5–35: RECLOSER CURVES GE107, GE111, GE112, GE114, GE115, GE121, AND GE122 GE202 GE135 GE119 7 8 9 10 12 CURRENT (multiple of pickup) 842727A1.CDR Figure 5–36: RECLOSER CURVES GE119, GE135, AND GE202 GE Multilin L90 Line Current Differential System 5-103...
  • Page 242: Phasor Measurement Unit

    The IEEE C37.118-2005 standard defines synchrophasors and related message for- mats to transmit synchrophasor data. Synchrophasor streaming via IEEE C37.118 has proven to work but the desire to 5-104 L90 Line Current Differential System GE Multilin...
  • Page 243 Precise time input to the relay from the international time standard, via either IRIG-B or PTP, is vital for correct syn- chrophasor measurement and reporting. For IRIG-B, a DC level shift IRIG-B receiver must be used for the phasor measurement unit to output proper synchrophasor values. NOTE GE Multilin L90 Line Current Differential System 5-105...
  • Page 244 The number of descriptions are equal to the number of bits configured in the 16 bit digital status word. All bitstrings less than or equal to 32 bits in length map into a 32 bit bitstring in an IEC 61850-90-5 dataset. NOTE 5-106 L90 Line Current Differential System GE Multilin...
  • Page 245 From each PMU the user selects the phasor information of interest that is mapped into the selected aggregator datset(s). For version 7.0 only FCDA data is supported. Figure 5–40: DATA SET CREATED FROM USER SELECTED INTERNAL ITEMS GE Multilin L90 Line Current Differential System 5-107...
  • Page 246 CFG-2 (IEEE C37.118 config. file). The CFG-2 request from the P30 can be on TCP/IP or UDP/IP, however, R-SV data streaming is only UDP multicasts (not TCP). Figure 5–42: CFG-2 BASED CONFIGURATION SOLUTION 5-108 L90 Line Current Differential System GE Multilin...
  • Page 247  UNIT 1  CONFIGURATION  PMU 1 See page 5-113. MESSAGE  COMMUNICATION  PMU 1 See page 5-115. MESSAGE  TRIGGERING  PMU 1 See page 5-122. MESSAGE  RECORDING GE Multilin L90 Line Current Differential System 5-109...
  • Page 248 Range: 1 to 65534 in steps of 1 PMU 1 IDCODE: MESSAGE Default: 1 Range: 32-character ASCII string truncated to 16 PMU 1 STN: MESSAGE characters if mapped into C37.118 Default: GE-UR-PMU GE-UR-PMU Range: Available signal sources PMU 1 SIGNAL SOURCE: MESSAGE Default: SRC 1 SRC 1...
  • Page 249 PMU 1 REPORTING RATE: This setting specifies the reporting rate for the network (Ethernet) port. This value applies to all PMU streams of the device that are assigned to transmit over this aggregator. For a system frequency of 60 Hz GE Multilin L90 Line Current Differential System...
  • Page 250 PMU1 D-CH-1 NORMAL STATE to PMU1 D-CH-16 NORMAL STATE: These settings allow for specifying a normal state for each digital channel. These states are transmitted in configuration frames to the data concentrator. 5-112 L90 Line Current Differential System GE Multilin...
  • Page 251 Range: available synchrophasor values PMU1 PORT PHS-1 MESSAGE PMU 1 V1 Range: 16-character ASCII string PMU1 PORT PHS-1 MESSAGE NM: GE-UR-PMU1-V1  Range: available synchrophasor values PMU1 PORT PHS-14 MESSAGE PMU 1 V1 Range: 16 alphanumeric characters PMU1 PORT PHS-14...
  • Page 252 PMU1 PORT D-CH-1 NORMAL STATE to PMU1 PORT D-CH-16 NORMAL STATE: These settings allow for specify- ing a normal state for each digital channel. These states are transmitted in configuration frames to the data concentra- tor. 5-114 L90 Line Current Differential System GE Multilin...
  • Page 253  PMU 1 USER PMU1 USER TRIGGER:  TRIGGER The user trigger allows customized triggering logic to be constructed from FlexLogic. The entire triggering logic is refreshed once every two power system cycles. GE Multilin L90 Line Current Differential System 5-115...
  • Page 254 PMU 1 FREQ TRIGGER DPO TIME: This setting could be used to extend the trigger after the situation returned to nor- mal. This setting is of particular importance when using the recorder in the forced mode (recording as long as the trig- gering condition is asserted). Figure 5–44: FREQUENCY TRIGGER SCHEME LOGIC 5-116 L90 Line Current Differential System GE Multilin...
  • Page 255 PMU 1 VOLT TRIGGER DPO TIME: This setting could be used to extend the trigger after the situation returned to nor- mal. This setting is of particular importance when using the recorder in the forced mode (recording as long as the trig- gering condition is asserted). GE Multilin L90 Line Current Differential System 5-117...
  • Page 256 PMU 1 CURR TRIGGER DPO TIME: This setting could be used to extend the trigger after the situation returned to nor- mal. This setting is of particular importance when using the recorder in the forced mode (recording as long as the trig- gering condition is asserted). 5-118 L90 Line Current Differential System GE Multilin...
  • Page 257 For single-phase power, 1 pu is a product of 1 pu voltage and 1 pu current, or the product of nominal second- ary voltage, the VT ratio and the nominal primary current. For the three-phase power, 1 pu is three times that for a sin- gle-phase power. The comparator applies a 3% hysteresis. GE Multilin L90 Line Current Differential System 5-119...
  • Page 258 S > APPARENT PICKUP APPARENT POWER, SB S > APPARENT PICKUP APPARENT POWER, SC S > APPARENT PICKUP 3P APPARENT POWER, S S > 3*(APPARENT PICKUP) 847003A1.CDR Figure 5–47: POWER TRIGGER SCHEME LOGIC 5-120 L90 Line Current Differential System GE Multilin...
  • Page 259 PMU 1 df/dt TRIGGER DPO TIME: PMU 1 SIGNAL FLEXLOGIC OPERAND SOURCE: df/dt > RAISE PMU 1 ROCOF TRIGGER ROCOF, df/dt –df/dt > FALL 847000A1.CDR Figure 5–48: RATE OF CHANGE OF FREQUENCY TRIGGER SCHEME LOGIC GE Multilin L90 Line Current Differential System 5-121...
  • Page 260 When the protocol selection is set via the software or keypad, all aggregators whose protocol is not set to None will be set to the last protocol saved (i.e., C37.118 or IEC61850-90-5) to any aggregators, as both C37.118 and IEC61850-90-5 simultaneous streaming of both R-SV values is not possible. NOTE 5-122 L90 Line Current Differential System GE Multilin...
  • Page 261 AGTR1 PDC CNTRL 3 Phasor data concentrator asserts control bit 3 as received via the network.  as above AGTR1 PDC CNTRL 16 Phasor data concentrator asserts control bit 16, as received via the network. GE Multilin L90 Line Current Differential System 5-123...
  • Page 262 Range: 0 to 4095 MSVCB 1 VID: MESSAGE Default: 0 Range: 0 to 16383 MSVCB 1 APPID: MESSAGE Default: 0 Range: 0 to 255.255.255.255 MSVCB 1 DEST. IP: MESSAGE Default: 224.0.0.0 224.0.0.0 5-124 L90 Line Current Differential System GE Multilin...
  • Page 263 MSVCB 1 Security: This setting selects what level of security and authentication is used, see table below, and is in the form of an enumeration as per standard. The range is 1, 2 and 3. Shaded settings in table below are not supported in firmware 7.0. ENUMERATION AUTHENTICATION ENCRYPTION NOTE GE Multilin L90 Line Current Differential System 5-125...
  • Page 264 NETWORK UDP PORT 1: This setting selects the first UDP port that will be used for network reporting. • NETWORK UDP PORT 2: This setting selects the second UDP port that will be used for network reporting. 5-126 L90 Line Current Differential System GE Multilin...
  • Page 265: Flexlogic

    Traditionally, protective relay logic has been relatively limited. Any unusual applications involving interlocks, blocking, or supervisory functions had to be hard-wired using contact inputs and outputs. FlexLogic minimizes the requirement for aux- iliary components and wiring while making more complex schemes possible. GE Multilin L90 Line Current Differential System 5-127...
  • Page 266 The virtual input is presently in the ON state. Virtual Output Virt Op 1 On The virtual output is presently in the set state (i.e. evaluation of the equation which produces this virtual output results in a "1"). 5-128 L90 Line Current Differential System GE Multilin...
  • Page 267 Phase B of the trip output element has operated 87L TRIP OP C Phase C of the trip output element has operated 87L TRIP 1P OP Single-pole trip is initiated 87L TRIP 3P OP Three-pole trip is initiated GE Multilin L90 Line Current Differential System 5-129...
  • Page 268 Breaker restrike detected in phase B of the breaker control 1 element. BRK RESTRIKE 1 OP C Breaker restrike detected in phase C of the breaker control 1 element. BKR RESTRIKE 2... Same set of operands as shown for BKR RESTRIKE 1 5-130 L90 Line Current Differential System GE Multilin...
  • Page 269 FlexElement 1 has picked up FlexElements FxE 1 OP FlexElement 1 has operated FxE 1 DPO FlexElement 1 has dropped out FxE 2 to FxE 8 Same set of operands as shown for FxE 1 GE Multilin L90 Line Current Differential System 5-131...
  • Page 270 Neutral directional overcurrent 1 forward has operated Neutral directional NTRL DIR OC1 REV Neutral directional overcurrent 1 reverse has operated overcurrent NTRL DIR OC2 Same set of operands as shown for NTRL DIR OC1 5-132 L90 Line Current Differential System GE Multilin...
  • Page 271 Phase B of phase instantaneous overcurrent 1 has dropped out PHASE IOC1 DPO C Phase C of phase instantaneous overcurrent 1 has dropped out PHASE IOC2 and higher Same set of operands as shown for PHASE IOC1 GE Multilin L90 Line Current Differential System 5-133...
  • Page 272 PMU ONE-SHOT OP Indicates the one-shot operation and remains asserted for 30 seconds afterwards PMU ONE-SHOT PENDING Indicates the one-shot operation is pending; that is, the present time is before the scheduled one-shot time 5-134 L90 Line Current Differential System GE Multilin...
  • Page 273 Sub-harmonic stator ground module trouble has picked up SH STAT GND TRB DPO Sub-harmonic stator ground module trouble has dropped out SH STAT GND TRB OP Sub-harmonic stator ground module trouble has operated GE Multilin L90 Line Current Differential System 5-135...
  • Page 274 Asserted when the trip bus 1 element picks up. Trip bus TRIP BUS 1 OP Asserted when the trip bus 1 element operates. TRIP BUS 2... Same set of operands as shown for TRIP BUS 1 5-136 L90 Line Current Differential System GE Multilin...
  • Page 275 Virt Op 1 Flag is set, logic=1 Virtual outputs Virt Op 2 Flag is set, logic=1 Virt Op 3 Flag is set, logic=1   Virt Op 96 Flag is set, logic=1 GE Multilin L90 Line Current Differential System 5-137...
  • Page 276 Monitors ambient temperature and maximum operating temperature UNIT NOT PROGRAMMED The product setup>installation>relay settings setting is not programmed TEMPERATURE TEMP MONITOR Asserted while the ambient temperature is greater than the maximum MONITOR operating temperature (80°C) 5-138 L90 Line Current Differential System GE Multilin...
  • Page 277 2 to 16 any input is ‘1’ 2 to 16 all inputs are ‘1’ 2 to 16 all inputs are ‘0’ NAND 2 to 16 any input is ‘0’ only one input is ‘1’ GE Multilin L90 Line Current Differential System 5-139...
  • Page 278: Flexlogic Rules

    When making changes to settings, all FlexLogic equations are re-compiled whenever any new setting value is entered, so all latches are automatically reset. If it is necessary to re-initialize FlexLogic during testing, for example, it is suggested to power the unit down and then back up. 5-140 L90 Line Current Differential System GE Multilin...
  • Page 279: Flexlogic Example

    Dropout State=Pickup (200 ms) DIGITAL ELEMENT 2 Timer 1 State=Operated Time Delay on Pickup (800 ms) CONTACT INPUT H1c State=Closed VIRTUAL OUTPUT 3 827026A2.VSD Figure 5–52: LOGIC EXAMPLE WITH VIRTUAL OUTPUTS GE Multilin L90 Line Current Differential System 5-141...
  • Page 280 Following the procedure outlined, start with parameter 99, as follows: 99: The final output of the equation is virtual output 3, which is created by the operator "= Virt Op n". This parameter is therefore "= Virt Op 3." 5-142 L90 Line Current Differential System GE Multilin...
  • Page 281 87: The input just below the upper input to OR #1 is operand “Virt Op 2 On". 86: The upper input to OR #1 is operand “Virt Op 1 On". 85: The last parameter is used to set the latch, and is operand “Virt Op 4 On". GE Multilin L90 Line Current Differential System 5-143...
  • Page 282 In the following equation, virtual output 3 is used as an input to both latch 1 and timer 1 as arranged in the order shown below: DIG ELEM 2 OP Cont Ip H1c On AND(2) 5-144 L90 Line Current Differential System GE Multilin...
  • Page 283: Flexlogic Equation Editor

    TIMER 1 TYPE: This setting is used to select the time measuring unit. • TIMER 1 PICKUP DELAY: Sets the time delay to pickup. If a pickup delay is not required, set this function to "0". GE Multilin L90 Line Current Differential System 5-145...
  • Page 284: Flexelements

    The element can be programmed to respond either to a signal level or to a rate-of-change (delta) over a pre-defined period of time. The output operand is asserted when the operating signal is higher than a threshold or lower than a threshold as per user's choice. 5-146 L90 Line Current Differential System GE Multilin...
  • Page 285 The FLEXELEMENT 1 DIRECTION following figure explains the application of the FLEXELEMENT 1 DIRECTION FLEXELEMENT 1 PICKUP FLEXELEMENT 1 HYS- settings. TERESIS GE Multilin L90 Line Current Differential System 5-147...
  • Page 286 DIRECTION = Under; FLEXELEMENT INPUT MODE = Signed; FlexElement 1 OpSig FLEXELEMENT 1 PKP FLEXELEMENT DIRECTION = Under; FLEXELEMENT INPUT MODE = Absolute; FlexElement 1 OpSig 842706A2.CDR Figure 5–60: FLEXELEMENT INPUT MODE SETTING 5-148 L90 Line Current Differential System GE Multilin...
  • Page 287 “Delta”. FLEXELEMENT 1 COMP MODE This setting specifies the pickup delay of the element. The setting FLEXELEMENT 1 PKP DELAY FLEXELEMENT 1 RST DELAY specifies the reset delay of the element. GE Multilin L90 Line Current Differential System 5-149...
  • Page 288: Non-volatile Latches

    LATCH N LATCH N LATCH N TYPE RESET Reset Dominant Previous Previous State State Dominant Previous Previous State State Figure 5–61: NON-VOLATILE LATCH OPERATION TABLE (N = 1 to 16) AND LOGIC 5-150 L90 Line Current Differential System GE Multilin...
  • Page 289: Grouped Elements

    Each of the six setting group menus is identical. Setting group 1 (the default active group) automatically becomes active if no other group is active (see the Control elements section for additional details). GE Multilin L90 Line Current Differential System...
  • Page 290: Line Differential Element

    FUNCTION: Disabled Range: 0.05 to 1.00 pu in steps of 0.01 CURRENT DIFF GND MESSAGE PICKUP: 0.10 pu Range: 1 to 50% in steps of 1 CURRENT DIFF GND MESSAGE RESTRAINT: 25% 5-152 L90 Line Current Differential System GE Multilin...
  • Page 291 If set to “Per phase”, the L90 performs inrush inhibit individually in each phase. – If set to “2-out-of-3”, the L90 checks second harmonic level in all three phases individually. If any two phases establish an inhibiting condition, then the remaining phase is restrained automatically. GE Multilin L90 Line Current Differential System 5-153...
  • Page 292 For the current differential element to function properly, it is imperative that all L90 devices on the protected line have exactly identical firmware revisions. For example, revision 5.62 in only compatible with 5.62, not 5.61 or 5.63. NOTE 5-154 L90 Line Current Differential System GE Multilin...
  • Page 293 5 SETTINGS 5.6 GROUPED ELEMENTS Figure 5–62: CURRENT DIFFERENTIAL SCHEME LOGIC GE Multilin L90 Line Current Differential System 5-155...
  • Page 294 STUB BUS TRIGGER associated instantaneous overcurrent pickup operand. The source assigned for the current of this element must cover the stub between CTs of the associated breakers and disconnect switch. 5-156 L90 Line Current Differential System GE Multilin...
  • Page 295 5 SETTINGS 5.6 GROUPED ELEMENTS Figure 5–63: STUB BUS SCHEME LOGIC GE Multilin L90 Line Current Differential System 5-157...
  • Page 296: Line Pickup

    2 or excessive phase current within eight power cycles after the autorecloser issues a close command results in the FlexLogic operand. For security, the overcurrent trip is supervised by LINE PICKUP RCL TRIP 5-158 L90 Line Current Differential System GE Multilin...
  • Page 297 1 extension functionality if external autoreclosure is employed. Another zone 1 extension approach is to permanently apply an overreaching zone, and reduce the reach when reclosing. This philosophy can be programmed via the autore- close scheme. Figure 5–64: LINE PICKUP SCHEME LOGIC GE Multilin L90 Line Current Differential System 5-159...
  • Page 298: Distance

    (logic 1), the distance functions become memory-polarized regardless of the positive-sequence voltage magnitude at this time. When the selected operand is de-asserted (logic 0), the distance functions follow other conditions of the memory volt- age logic. 5-160 L90 Line Current Differential System GE Multilin...
  • Page 299 The distance zones of the L90 are identical to that of the UR-series D60 Line Distance Relay. For additional infor- mation on the L90 distance functions, please refer to Chapter 8 of the D60 manual, available on the GE EnerVista CD or free of charge on the GE Multilin web page.
  • Page 300 PHS DIST Z1 DIR: All phase distance zones are reversible. The forward direction is defined by the PHS DIST Z1 RCA setting, whereas the reverse direction is shifted 180° from that angle. The non-directional zone spans between the for- 5-162 L90 Line Current Differential System GE Multilin...
  • Page 301 COMP LIMIT DIR COMP LIMIT DIR COMP LIMIT DIR RCA 837720A1.CDR Figure 5–66: DIRECTIONAL MHO DISTANCE CHARACTERISTIC COMP LIMIT REV REACH 837802A1.CDR Figure 5–67: NON-DIRECTIONAL MHO DISTANCE CHARACTERISTIC GE Multilin L90 Line Current Differential System 5-163...
  • Page 302 Figure 5–68: DIRECTIONAL QUADRILATERAL PHASE DISTANCE CHARACTERISTIC COMP LIMIT COMP LIMIT LFT BLD RCA RGT BLD RCA -LFT BLD RGT BLD REV REACH COMP LIMIT COMP LIMIT 837803A1.CDR Figure 5–69: NON-DIRECTIONAL QUADRILATERAL PHASE DISTANCE CHARACTERISTIC 5-164 L90 Line Current Differential System GE Multilin...
  • Page 303 DIR COMP LIMIT = 60 RGT BLD RCA = 90 RGT BLD RCA = 80 LFT BLD RCA = 90 LFT BLD RCA = 80 837723A1.CDR Figure 5–71: QUADRILATERAL DISTANCE CHARACTERISTIC SAMPLE SHAPES GE Multilin L90 Line Current Differential System 5-165...
  • Page 304 The setting is an angle of reach impedance as shown in the distance characteristic figures shown earlier. This setting is independent from , the characteristic angle of an PHS DIST Z1 DIR RCA extra directional supervising function. 5-166 L90 Line Current Differential System GE Multilin...
  • Page 305 PHS DIST Z1 BLK: This setting enables the user to select a FlexLogic operand to block a given distance element. VT fuse fail detection is one of the applications for this setting. GE Multilin L90 Line Current Differential System 5-167...
  • Page 306 2 operation when the fault evolves from one type to another or migrates from the initial zone to zone 2. Desired zones in the trip output function should be assigned to accomplish NOTE this functionality. 5-168 L90 Line Current Differential System GE Multilin...
  • Page 307 5 SETTINGS 5.6 GROUPED ELEMENTS Figure 5–75: PHASE DISTANCE ZONES 3 AND HIGHER OP SCHEME Figure 5–76: PHASE DISTANCE SCHEME LOGIC GE Multilin L90 Line Current Differential System 5-169...
  • Page 308 Range: 60 to 90° in steps of 1 GND DIST Z1 QUAD MESSAGE LFT BLD RCA: 85° Range: 0.050 to 30.000 pu in steps of 0.001 GND DIST Z1 MESSAGE SUPV: 0.200 pu 5-170 L90 Line Current Differential System GE Multilin...
  • Page 309 The directional and non-directional quadrilateral ground distance characteristics are shown below. The directional and non-directional mho ground distance characteristics are the same as those shown for the phase distance element in the previous sub-section. GE Multilin L90 Line Current Differential System 5-171...
  • Page 310 DISTANCE SOURCE zero-sequence impedance between the lines and the positive-sequence impedance of the protected line. It is impera- tive to set this setting to zero if the compensation is not to be performed. 5-172 L90 Line Current Differential System GE Multilin...
  • Page 311 This setting applies only to the GND DIST Z1 QUAD RGT BLD RCA quadrilateral characteristic and should be set with consideration to the maximum load current and required resistive coverage. GE Multilin L90 Line Current Differential System 5-173...
  • Page 312 GND DIST Z1 SUPN IN OPEN POLE OP ** ** D60, L60, and L90 only. Other UR-series models apply regular current seal-in for zone 1. 837018A7.CDR Figure 5–79: GROUND DISTANCE ZONE 1 OP SCHEME 5-174 L90 Line Current Differential System GE Multilin...
  • Page 313 3 or 4 to zone 2. The desired zones should be assigned in the trip output element to accomplish this NOTE functionality. Figure 5–81: GROUND DISTANCE ZONES 3 AND HIGHER OP SCHEME GE Multilin L90 Line Current Differential System 5-175...
  • Page 314 5.6 GROUPED ELEMENTS 5 SETTINGS Figure 5–82: GROUND DISTANCE ZONE 1 SCHEME LOGIC 5-176 L90 Line Current Differential System GE Multilin...
  • Page 315 The supervision is biased toward operation in order to avoid compromising the sensitivity of ground distance elements at low signal levels. Otherwise, the reverse fault condition that generates concern will have high polarizing levels so that a cor- rect reverse fault decision can be reliably made. GE Multilin L90 Line Current Differential System 5-177...
  • Page 316: Power Swing Detect

    LIMIT ANGLE: 120° Range: 40 to 140° in steps of 1 POWER SWING MIDDLE MESSAGE LIMIT ANGLE: 90° Range: 40 to 140° in steps of 1 POWER SWING INNER MESSAGE LIMIT ANGLE: 60° 5-178 L90 Line Current Differential System GE Multilin...
  • Page 317 Different protection elements respond differently to power swings. If tripping is required for faults during power swing condi- tions, some elements may be blocked permanently (using the operand), and others may be blocked POWER SWING BLOCK and dynamically unblocked upon fault detection (using the operand). POWER SWING UN/BLOCK GE Multilin L90 Line Current Differential System 5-179...
  • Page 318 The element can be set to use either lens (mho) or rectangular (quadrilateral) characteristics as illustrated below. When set to “Mho”, the element applies the right and left blinders as well. If the blinders are not required, their settings should be set high enough to effectively disable the blinders. 5-180 L90 Line Current Differential System GE Multilin...
  • Page 319 5 SETTINGS 5.6 GROUPED ELEMENTS Figure 5–85: POWER SWING DETECT MHO OPERATING CHARACTERISTICS Figure 5–86: EFFECTS OF BLINDERS ON THE MHO CHARACTERISTICS GE Multilin L90 Line Current Differential System 5-181...
  • Page 320 POWER SWING SHAPE: This setting selects the shapes (either “Mho” or “Quad”) of the outer, middle and, inner char- acteristics of the power swing detect element. The operating principle is not affected. The “Mho” characteristics use the left and right blinders. 5-182 L90 Line Current Differential System GE Multilin...
  • Page 321 (the actual trip may be delayed as per the setting). Therefore, this angle must be selected in consider- TRIP MODE ation to the power swing angle beyond which the system becomes unstable and cannot recover. GE Multilin L90 Line Current Differential System 5-183...
  • Page 322 The blocking signal resets the output operand but does not stop the out-of-step tripping sequence. POWER SWING TRIP 5-184 L90 Line Current Differential System GE Multilin...
  • Page 323 5 SETTINGS 5.6 GROUPED ELEMENTS Figure 5–88: POWER SWING DETECT SCHEME LOGIC (1 of 3) Figure 5–89: POWER SWING DETECT SCHEME LOGIC (2 of 3) GE Multilin L90 Line Current Differential System 5-185...
  • Page 324 L1 AND L4 LATCHES ARE SET DOMINANT L2, L3 AND L5 LATCHES ARE RESET DOMINANT Off=0 FLEXLOGIC OPERAND POWER SWING OUTGOING 827841A4.CDR Figure 5–90: POWER SWING DETECT SCHEME LOGIC (3 of 3) 5-186 L90 Line Current Differential System GE Multilin...
  • Page 325: Load Encroachment

    The element operates if the positive-sequence voltage is above a settable level and asserts its output signal that can be used to block selected protection elements such as distance or phase overcurrent. The following figure shows an effect of the load encroachment characteristics used to block the quadrilateral distance element. GE Multilin L90 Line Current Differential System 5-187...
  • Page 326 LOAD ENCROACHMENT ANGLE: This setting specifies the size of the blocking region as shown on the Load encroachment characteristic diagram and applies to the positive-sequence impedance. Figure 5–93: LOAD ENCROACHMENT SCHEME LOGIC 5-188 L90 Line Current Differential System GE Multilin...
  • Page 327: Phase Current

     DIRECTIONAL 2 b) INVERSE TIME OVERCURRENT CHARACTERISTICS The inverse time overcurrent curves used by the time overcurrent elements are the IEEE, IEC, GE Type IAC, and I t stan- dard curve shapes. This allows for simplified coordination with downstream devices.
  • Page 328 4.827 38.634 22.819 14.593 11.675 10.130 9.153 8.470 7.960 7.562 7.241 51.512 30.426 19.458 15.567 13.507 12.204 11.294 10.614 10.083 9.654 10.0 64.390 38.032 24.322 19.458 16.883 15.255 14.117 13.267 12.604 12.068 5-190 L90 Line Current Differential System GE Multilin...
  • Page 329 1.835 1.067 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 GE Multilin L90 Line Current Differential System 5-191...
  • Page 330 = characteristic constant, and T = reset time in seconds (assuming energy capacity is 100% RESET is “Timed”) RESET Table 5–21: GE TYPE IAC INVERSE TIME CURVE CONSTANTS IAC CURVE SHAPE IAC Extreme Inverse 0.0040 0.6379 0.6200 1.7872 0.2461...
  • Page 331 = Reset Time in seconds (assuming energy capacity is 100% and RESET: Timed) RESET RECLOSER CURVES: The L90 uses the FlexCurve feature to facilitate programming of 41 recloser curves. Please refer to the FlexCurve section in this chapter for additional details. GE Multilin L90 Line Current Differential System 5-193...
  • Page 332 ‘Mvr’ times the setting. If the voltage restraint feature PHASE TOC1 PICKUP is disabled, the pickup level always remains at the setting value. 5-194 L90 Line Current Differential System GE Multilin...
  • Page 333 5 SETTINGS 5.6 GROUPED ELEMENTS Phase-Phase Voltage ÷ VT Nominal Phase-phase Voltage 818784A4.CDR Figure 5–94: PHASE TIME OVERCURRENT VOLTAGE RESTRAINT CHARACTERISTIC Figure 5–95: PHASE TIME OVERCURRENT 1 SCHEME LOGIC GE Multilin L90 Line Current Differential System 5-195...
  • Page 334 The input current is the fundamental phasor magnitude. For timing curves, see the publication Instan- taneous Overcurrent Element Response to Saturated Waveforms in UR-Series Relays (GET-8400A). Figure 5–96: PHASE INSTANTANEOUS OVERCURRENT 1 SCHEME LOGIC 5-196 L90 Line Current Differential System GE Multilin...
  • Page 335 CTs and the line-line voltage from the VTs, based on the 90° or quadrature connection. If there is a requirement to supervise overcurrent elements for flows in opposite directions, such as can happen through a bus-tie breaker, two phase directional elements should be programmed with opposite element characteristic angle (ECA) settings. GE Multilin L90 Line Current Differential System 5-197...
  • Page 336 10 ms must be added to all the instantaneous protection elements under the supervi- sion of the phase directional element. If current reversal is of a concern, a longer delay – in the order of 20 ms – may be needed. 5-198 L90 Line Current Differential System GE Multilin...
  • Page 337: Neutral Current

     NEUTRAL IOC1 See page 5-201. MESSAGE   NEUTRAL IOC2 See page 5-201. MESSAGE   NEUTRAL See page 5-202. MESSAGE  DIRECTIONAL OC1  NEUTRAL See page 5-202. MESSAGE  DIRECTIONAL OC2 GE Multilin L90 Line Current Differential System 5-199...
  • Page 338 For example, if the element reset characteristic is set to “Instan- taneous” and the element is blocked, the time accumulator will be cleared immediately. Figure 5–99: NEUTRAL TIME OVERCURRENT 1 SCHEME LOGIC 5-200 L90 Line Current Differential System GE Multilin...
  • Page 339 The operating quantity depends on how test currents are injected into the relay (single-phase injection:   0.9375 I ; three-phase pure zero-sequence injection: injected injected Figure 5–100: NEUTRAL IOC1 SCHEME LOGIC GE Multilin L90 Line Current Differential System 5-201...
  • Page 340     (EQ 5.20) – The positive-sequence restraint allows for more sensitive settings by counterbalancing spurious zero-sequence currents resulting from: • System unbalances under heavy load conditions. 5-202 L90 Line Current Differential System GE Multilin...
  • Page 341 1.5 of a power system cycle. The element is designed to emulate an electromechanical directional device. Larger operating and polarizing signals results in faster directional discrimination bringing more security to the element operation. GE Multilin L90 Line Current Differential System 5-203...
  • Page 342 The low-side system impedance should be assumed minimal when checking for this condition. A similar sit- uation arises for a wye/delta/wye transformer, where current in one transformer winding neutral may reverse when faults on both sides of the transformer are considered. 5-204 L90 Line Current Differential System GE Multilin...
  • Page 343 NEUTRAL DIR OC1 REV PICKUP: This setting defines the pickup level for the overcurrent unit of the element in the reverse direction. When selecting this setting it must be kept in mind that the design uses a positive-sequence restraint technique for the “Calculated 3I0” mode of operation. GE Multilin L90 Line Current Differential System 5-205...
  • Page 344 5.6 GROUPED ELEMENTS 5 SETTINGS Figure 5–102: NEUTRAL DIRECTIONAL OVERCURRENT LOGIC 5-206 L90 Line Current Differential System GE Multilin...
  • Page 345: Wattmetric Ground Fault

    VT connected to the auxiliary channel bank of the relay). When the latter selection is made, the auxiliary channel must be identified by the user as a neutral voltage under the VT bank settings. This element operates when the auxil- iary voltage is configured as neutral. GE Multilin L90 Line Current Differential System 5-207...
  • Page 346   FlexCurve --------- - (EQ 5.23)   Again, the FlexCurve timer starts after the definite time timer expires. 5-208 L90 Line Current Differential System GE Multilin...
  • Page 347 1 FUNCTION: WATTMETRIC GND FLT 1 Enabled = 1 OC PKP DEL: WATT GND FLT 1 BLK: FLEXLOGIC OPERAND Off = 0 WATTMETRIC 1 PKP 837033A4.CDR Figure 5–104: WATTMETRIC ZERO-SEQUENCE DIRECTIONAL LOGIC GE Multilin L90 Line Current Differential System 5-209...
  • Page 348: Ground Current

    These elements measure the current that is connected to the ground channel of a CT/VT module. The conversion range of a standard channel is from 0.02 to 46 times the CT rating. NOTE Figure 5–105: GROUND TOC1 SCHEME LOGIC 5-210 L90 Line Current Differential System GE Multilin...
  • Page 349 These elements measure the current that is connected to the ground channel of a CT/VT module. The conversion range of a standard channel is from 0.02 to 46 times the CT rating. NOTE Figure 5–106: GROUND IOC1 SCHEME LOGIC GE Multilin L90 Line Current Differential System 5-211...
  • Page 350 CT installed in the grounding path, or the ground current obtained by external summation of the neutral-side stator CTs. The Typical Applications of RGF Protec- tion diagram explains the basic application and wiring rules. 5-212 L90 Line Current Differential System GE Multilin...
  • Page 351 The zero-sequence component of the restraining signal (IR0) is meant to provide maximum restraint during external ground faults, and therefore is calculated as a vectorial difference of the ground and neutral currents:   IG IN (EQ 5.26) – – GE Multilin L90 Line Current Differential System 5-213...
  • Page 352 Having the differential and restraining signals developed, the element applies a single slope differential characteristic with a minimum pickup as shown in the logic diagram below. Figure 5–109: RESTRICTED GROUND FAULT SCHEME LOGIC 5-214 L90 Line Current Differential System GE Multilin...
  • Page 353 Igd = abs(3  3.3 + 0.0) = 10 pu, IR0 = abs(3  3.3 – (0.0)) = 10 pu, IR2 = 3  3.3 = 10 pu, IR1 = 3  (3.33 – 3.33) = 0 pu, and Igr = 10 pu The differential current is 100% of the restraining current. GE Multilin L90 Line Current Differential System 5-215...
  • Page 354: Negative Sequence Current

    For example, if the element reset characteristic is set to “Instanta- neous” and the element is blocked, the time accumulator is cleared immediately. Figure 5–110: NEGATIVE SEQUENCE TOC1 SCHEME LOGIC 5-216 L90 Line Current Differential System GE Multilin...
  • Page 355 The operating quantity depends on the way the test currents are injected into the relay (single-phase injection:  0.2917 I ; three-phase injection, opposite rotation: injected injected Figure 5–111: NEGATIVE SEQUENCE IOC1 SCHEME LOGIC GE Multilin L90 Line Current Differential System 5-217...
  • Page 356 The positive-sequence restraint allows for more sensitive settings by counterbalancing spurious negative-sequence and zero-sequence currents resulting from: • System unbalances under heavy load conditions. • Transformation errors of current transformers (CTs). • Fault inception and switch-off transients. 5-218 L90 Line Current Differential System GE Multilin...
  • Page 357 = 80° (forward limit angle = ± the angular limit with the ECA for operation) REV LA = 80° (reverse limit angle = ± the angular limit with the ECA for operation) GE Multilin L90 Line Current Differential System 5-219...
  • Page 358 The element characteristic angle in the reverse direction is the angle set for the forward direction shifted by 180°. • NEG SEQ DIR OC1 FWD LIMIT ANGLE: This setting defines a symmetrical (in both directions from the ECA) limit angle for the forward direction. 5-220 L90 Line Current Differential System GE Multilin...
  • Page 359 When NEG SEQ DIR OC1 TYPE selecting this setting it must be kept in mind that the design uses a positive-sequence restraint technique. Figure 5–113: NEGATIVE SEQUENCE DIRECTIONAL OC1 SCHEME LOGIC GE Multilin L90 Line Current Differential System 5-221...
  • Page 360: Breaker Failure

    Range: 0.001 to 30.000 pu in steps of 0.001 BF1 N AMP HISET MESSAGE PICKUP: 1.050 pu Range: 0.001 to 30.000 pu in steps of 0.001 BF1 PH AMP LOSET MESSAGE PICKUP: 1.050 pu 5-222 L90 Line Current Differential System GE Multilin...
  • Page 361 Thus, if this choice is made, fault levels must always be above the supervision pickup levels for dependable operation of GE Multilin L90 Line Current Differential System...
  • Page 362 BREAKER FAILURE TIMER No. 2 (±1/8 cycle) INITIATE (1/8 cycle) BREAKER FAILURE CURRENT DETECTOR PICKUP (1/8 cycle) BREAKER FAILURE OUTPUT RELAY PICKUP (1/4 cycle) FAULT cycles OCCURS 827083A6.CDR Figure 5–114: BREAKER FAILURE MAIN PATH SEQUENCE 5-224 L90 Line Current Differential System GE Multilin...
  • Page 363 BF1 TIMER 3 PICKUP DELAY: