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GE L90 Instruction Manual

Line current differential system.
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GE
Grid Solutions
L90
Line Current Differential System
Instruction Manual
Product version: 7.6x
GE publication code: 1601-0081-AF1 (GEK-131004)
E83849
LISTED
IND.CONT. EQ.
52TL
1601-0081-AF1

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   Summary of Contents for GE L90

  • Page 1 Grid Solutions Line Current Differential System Instruction Manual Product version: 7.6x GE publication code: 1601-0081-AF1 (GEK-131004) E83849 LISTED IND.CONT. EQ. 52TL 1601-0081-AF1...
  • 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

    Power supply ........................2-45 2.6.7 Outputs............................2-46 2.6.8 Communication protocols....................2-48 2.6.9 Inter-relay communications..................2-49 2.6.10 CyberSentry security......................2-50 2.6.11 Graphical front panel......................2-50 2.6.12 Environmental........................2-51 2.6.13 Type tests ..........................2-52 2.6.14 Production tests ........................2-52 2.6.15 Approvals ..........................2-53 2.6.16 Maintenance.........................2-53 L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 4 3.11.2 Event records ........................3-66 3.11.3 Log files........................... 3-66 3.11.4 Setting files..........................3-67 4 INTERFACES EnerVista software interface................4-1 4.1.1 Introduction ..........................4-1 4.1.2 Settings files ..........................4-1 4.1.3 Event viewing..........................4-2 4.1.4 File support ..........................4-3 L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 5 5.3.15 User-programmable pushbuttons ................5-127 5.3.16 Flex state parameters ....................5-133 5.3.17 User-definable displays....................5-134 5.3.18 Installation ..........................5-135 Remote resources ....................5-136 5.4.1 Remote resources configuration ................5-136 System setup.......................5-137 5.5.1 AC inputs ..........................5-137 5.5.2 Power system........................5-138 L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 6 5.9.2 Virtual inputs ........................5-415 5.9.3 Contact outputs....................... 5-416 5.9.4 Virtual outputs........................5-420 5.9.5 Direct inputs and outputs ................... 5-420 5.9.6 Resetting ..........................5-421 5.10 Transducer inputs/outputs................5-422 5.10.1 DCmA inputs........................5-422 L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 7 Restricted ground fault....................6-27 6.4.15 Transducer inputs and outputs ...................6-27 6.4.16 Distance..........................6-27 Records ........................6-29 6.5.1 Fault reports .........................6-29 6.5.2 Event records ........................6-30 6.5.3 Oscillography........................6-32 6.5.4 Data logger ...........................6-32 6.5.5 Phasor Measurement Unit records................6-33 L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 8 Ground directional overcurrent .................. 8-23 Lines with tapped transformers ................8-23 8.7.1 Overview ..........................8-23 8.7.2 Transformer load currents .................... 8-24 8.7.3 LV-side faults........................8-24 8.7.4 External ground faults ..................... 8-24 Instantaneous elements ..................8-25 viii L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 9 10.5.1 Overview..........................10-37 10.5.2 Phase selection ........................10-40 10.5.3 Communications channels for pilot-aided schemes........10-42 10.5.4 Permissive echo signaling...................10-48 10.5.5 Pilot scheme / phase selector coordination ............10-49 10.5.6 Cross-country fault example ..................10-50 10.6 Fault locator......................10-51 L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 10 FlexAnalog items ....................A-1 OPERANDS B RADIUS SERVER RADIUS server configuration ................B-1 CONFIGURATION C COMMAND LINE Command line interface ..................C-1 INTERFACE D MISCELLANEOUS Warranty ......................... D-1 Revision history ..................... D-1 ABBREVIATIONS INDEX L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 11: Introduction

    Ensure that the control power applied to the device, the alternating current (AC), and voltage input match the ratings specified on the relay nameplate. Do not apply current or voltage in excess of the specified limits. L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 12: For Further Assistance

    Website: http://www.gegridsolutions.com/multilin When contacting GE by e-mail, optionally include a device information file, which is generated in the EnerVista software by clicking the Service Report button. When using the optional graphical front panel, the report instead can be generated by connecting a USB drive to the front panel.
  • Page 13 CHAPTER 1: INTRODUCTION FOR FURTHER ASSISTANCE Figure 1-1: Generate service report in EnerVista software L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 14 FOR FURTHER ASSISTANCE CHAPTER 1: INTRODUCTION L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 15: Product Description

    2.1 Product description The L90 Line Current Differential System is part of the Universal Relay (UR) series of products. It is a digital current differential relay system with an integral communications channel interface. It is a complete line terminal protection and control system, able to deliver protection as either a line differential and/or distance device.
  • Page 16: Description

    RMS magnitude, or as fundamental frequency only root mean square (RMS) magnitude and angle (phasor). Settings and actual values can be accessed from the front panel or EnerVista software. The L90 uses flash memory technology that allows field upgrading as new features are added. Firmware and software are upgradable.
  • Page 17: Features

    VT Fuse Failure Event Recorder Open Pole Detector 2.1.1 Features 2.1.1.1 Line current differential • Phase segregated, high-speed digital current differential system • Overhead and underground AC transmission lines, series compensated lines L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 18 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 19: Pilot Channel Relaying

    IEEE C37.94 820 nm multimode fiber with an LED transmitter All fiber optic options use an ST connector. L90 models are available for use on two or three terminal lines. A two terminal line application requires one bidirectional channel. However, in two terminal line applications, it is also possible to use an L90 relay with two bidirectional channels.
  • Page 20 CHAPTER 2: PRODUCT DESCRIPTION If a slave L90 issues a trip from one of its backup functions, it can send a transfer trip signal to its master and other slave relays if such option is designated. Because a slave cannot communicate with all the relays in the differential scheme, the master then “broadcasts”...
  • Page 21: Channel Monitor

    2.2.2 Channel monitor The L90 has logic to detect that the communications channel is deteriorating or has failed completely. This can provide an alarm indication and disable the current differential protection. Note that a failure of the communications from the master to a slave does not prevent the master from performing the current differential algorithm;...
  • Page 22: Direct Transfer Tripping

    The L90 supports password entry from a local or remote connection. Local access is defined as any access to settings or commands via the front panel interface. This includes both keypad entry and the through the front panel RS232 port.
  • Page 23 |--------------- Supervisory See table notes See table notes |--------------- Display Properties |--------------- Clear Relay Records (settings) |--------------- Communications |--------------- Modbus User Map |--------------- Real Time Clock |--------------- Oscillography |--------------- Data Logger |--------------- Demand L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 24 |---------- Virtual Inputs |---------- Clear Records |---------- Set Date and Time User Displays Targets Actual Values |---------- Front panel labels designer |---------- Status |---------- Metering |---------- Transducer I/O |---------- Records |---------- Product Info 2-10 L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 25: Order Codes

    The order code is on the product label and indicates the product options applicable. The L90 is available as a 19-inch rack horizontal mount or reduced-size (¾) vertical unit. It consists of the following modules: power supply, CPU, CT/VT, contact input and output, transducer input and output, and inter-relay communications.
  • Page 26: Order Codes With Enhanced Ct/vt Modules

    The R-GOOSE protocol described in IEC 61850-8-1 is available through the IEC 61850 software option. R-GOOSE security requires the CyberSentry software option. 2.4.1 Order codes with enhanced CT/VT modules Table 2-4: L90 order codes for horizontal units - * ** - * *...
  • Page 27 IEC 60870-5-103 + PMU IEC 60870-5-103 + IEC 61850 + PMU IEC 60870-5-103 + Breaker-and-a-half + PMU IEC 60870-5-103 + IEC 61850 + Breaker-and-a-half + PMU IEC 60870-5-103 + In-zone transformer protection L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 2-13...
  • Page 28 Half + PMU + 61850-90-5 IEC 60870-5-103 + IEEE 1588 + PRP + CyberSentry UR Lvl 1 + In-zone TX + IEC 61850 + Breaker and Half + PMU + 61850-90-5 2-14 L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 29 Channel 1 - G.703; Channel 2 - 1300 nm, single-mode ELED 820 nm, multimode, LED, 2 Channels 1300 nm, multimode, LED, 2 Channels 1300 nm, single-mode, ELED, 2 Channels 1300 nm, single-mode, Laser, 2 Channels L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 2-15...
  • Page 30 G.703, 2 Channels RS422, 1 Channel RS422, 2 Channels, 2 Clock Inputs 7W RS422, 2 Channels Table 2-5: L90 order codes for reduced-size vertical units - * ** - * * * - F ** - H ** - L **...
  • Page 31 IEC 61850 + Breaker and Half + PMU + 61850-90-5 In-zone TX protection + IEC 61850 + PMU + 61850-90-5 In-zone TX + IEC 61850 + Breaker and Half + PMU + 61850-90-5 L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 2-17...
  • Page 32 8 DCmA inputs INTER-RELAY C37.94SM, 1300 nm single-mode, ELED, 1 channel single-mode C37.94SM, 1300 nm single-mode, ELED, 2 channel single-mode COMMUNICATIONS Bi-phase, single channel (select a maximum of 1 per unit) 2-18 L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 33: Order Codes With Process Bus Modules

    RS422, 1 Channel RS422, 2 Channels, 2 Clock Inputs 7W RS422, 2 Channels 2.4.2 Order codes with process bus modules Table 2-6: L90 order codes for horizontal units with process bus - * * * - F ** - H **...
  • Page 34 IEC 60870-5-103 + Breaker-and-a-half IEC 60870-5-103 + IEC 61850 IEC 60870-5-103 + IEC 61850 + Breaker-and-a-half IEC 60870-5-103 + PMU IEC 60870-5-103 + IEC 61850 + PMU IEC 60870-5-103 + Breaker-and-a-half + PMU 2-20 L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 35 IEC 60870-5-103 + IEEE 1588 + PRP + In-zone TX + IEC 61850 + Breaker and Half + PMU + 61850-90-5 IEC 60870-5-103 + IEEE 1588 + PRP + CyberSentry UR Lvl 1 + In-zone TX + IEC 61850 + Breaker and Half + PMU + 61850-90-5 L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 2-21...
  • Page 36 7Q Channel 1 - G.703; Channel 2 - 1300 nm, single-mode Laser 7R G.703, 1 Channel 7S G.703, 2 Channels 7T RS422, 1 Channel 7V RS422, 2 Channels, 2 Clock Inputs 7W RS422, 2 Channels 2-22 L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 37 CHAPTER 2: PRODUCT DESCRIPTION ORDER CODES Table 2-7: L90 order codes for reduced-size vertical units with process bus - * ** - * * * - F ** - H ** - L ** - N ** - R **...
  • Page 38 IEEE 1588 + PRP + IEC 61850 + Breaker and Half + PMU + 61850-90-5 IEEE 1588 + PRP + In-zone TX protection + IEC 61850 + PMU + 61850-90-5 PRP + CyberSentry UR Lvl 1 + IEC 61850 + PMU + 61850-90-5 2-24 L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 39 7M Channel 1 - RS422; Channel 2 - 1300 nm, multimode, LED Channel 1 - RS422; Channel 2 - 1300 nm, single-mode, ELED Channel 1 - RS422; Channel 2 - 1300 nm, single-mode, Laser L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 2-25...
  • Page 40: Replacement Modules

    Replacement modules can be ordered separately. When ordering a replacement CPU module or front panel, provide the serial number of your existing unit. Not all replacement modules apply to the L90 relay. The modules specified in the order codes for the L90 are available as replacement modules for the L90.
  • Page 41 IEEE C37.94, 820 nm, 64 kbps, multimode, LED, 1 Channel IEEE C37.94, 820 nm, 64 kbps, multimode, LED, 2 Channels 820 nm, multimode, LED, 1 Channel 1300 nm, multimode, LED, 1 Channel 1300 nm, single-mode, ELED, 1 Channel L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 2-27...
  • Page 42: Signal Processing

    (when applicable), and auxiliary voltages. The 2.4 kHz cut-off frequency applies to both 50 Hz and 60 Hz applications and fixed in the hardware, and thus is not dependent on the system nominal frequency setting. 2-28 L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 43 The A/D converter has the following ranges of AC signals: Voltages: Eq. 2-1 Currents: Eq. 2-2 Current harmonics are estimated based on raw samples with the use of the full-cycle Fourier filter. Harmonics 2nd through 25th are estimated. L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 2-29...
  • Page 44: Specifications

    ICD/CID/IID files, and so on), IEEE 1588 (IEEE C37.238 power profile) based time synchronization, CyberSentry (advanced cyber security), the Parallel Redundancy Protocol (PRP), IEC 60870-5-103, and so on. 2.6 Specifications Specifications are subject to change without notice. 2-30 L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 45: Protection Elements

    5 to 25 cycles in steps of 1 VT location: all delta-wye and wye-delta transformers CT location: all delta-wye and wye-delta transformers Voltage supervision pickup (series compensation applications): 0 to 5.000 pu in steps of 0.001 L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 2-31...
  • Page 46 60 to 90° in steps of 1 Time delay: 0.000 to 65.535 s in steps of 0.001 Timer accuracy: ±3% of operate time or ±1/4 cycle (whichever is greater) Current supervision: Level: neutral current (3I_0) 2-32 L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 47 ±3% of reading of the maximum circuit current Breakpoint between slopes: 0.0 to 20.0 pu in steps of 0.1 DTT: Direct Transfer Trip (1 and 3 pole) to remote L90 Operating Time: 1.0 to 1.5 power cycles duration Asymmetrical channel delay compensation using GPS: asymmetry up to 10 ms In-zone transformer group compensation: 0 to 330°...
  • Page 48 > 2.0 × CT: ±1.5% of reading > 2.0 × CT rating Curve shapes: IEEE Moderately/Very/Extremely Inverse; IEC (and BS) A/B/C and Short Inverse; GE IAC Inverse, Short/Very/ Extremely Inverse; I t; FlexCurves™ (programmable); Definite Time (0.01 s base curve) Curve multiplier: Time Dial = 0.00 to 600.00 in steps of 0.01...
  • Page 49 CHAPTER 2: PRODUCT DESCRIPTION SPECIFICATIONS Curve shapes: IEEE Moderately/Very/Extremely Inverse; IEC (and BS) A/B/C and Short Inverse; GE IAC Inverse, Short/Very/ Extremely Inverse; I t; FlexCurves™ (programmable); Definite Time (0.01 s base curve) Curve multiplier (Time dial): 0.00 to 600.00 in steps of 0.01...
  • Page 50 PHASE OVERVOLTAGE Voltage: Phasor only Pickup level: 0.004 to 3.000 pu in steps of 0.001 Dropout level: 97 to 98% of pickup Level accuracy: ±0.5% of reading from 10 to 208 V 2-36 L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 51 Typical times are average operate times including variables such as frequency change instance, test method, and so on, and can vary by ±0.5 cycles. OVERFREQUENCY Pickup level: 20.00 to 65.00 Hz in steps of 0.01 L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 2-37...
  • Page 52 ±3% of operate time or ±42 ms, whichever is greater Operate time: <42 ms at 1.10 × pickup at 60 Hz BREAKER RESTRIKE Principle: detection of high-frequency overcurrent condition ¼ cycle after breaker opens 2-38 L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 53 ±3% of operate time or ±1/4 cycle (whichever is greater) LOAD ENCROACHMENT Responds to: Positive-sequence quantities Minimum voltage: 0.004 to 3.000 pu in steps of 0.001 Reach (sec. Ω): 0.02 to 250.00 Ω in steps of 0.01 L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 2-39...
  • Page 54: User-programmable Elements

    Time delay: 0 to 65535 ms in steps of 1 FLEX STATES Number: up to 256 logical variables grouped under 16 Modbus addresses Programmability: any logical variable, contact, or virtual input 2-40 L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 55 Time-out timer: 3.0 to 60.0 s in steps of 0.1 Control inputs: step-up and 3-bit Power-up mode: restore from non-volatile memory or synchronize to a 3-bit control input or synch/restore mode L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 2-41...
  • Page 56: Monitoring

    See Theory of Operation chapter (single-ended method) RELAY ACCURACY 1.5% %error PHASOR MEASUREMENT UNIT Output format: per IEEE C37.118 or IEC 61850-90-5 standard Number of channels: 14 synchrophasors, 8 analogs, 16 digitals 2-42 L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 57: Metering

    < 0.4pu: as above plus %error of f VOLTAGE HARMONICS Harmonics: 2nd to 25th harmonic: per phase, displayed as a % of f fundamental frequency phasor) THD: per phase, displayed as a % of f Accuracy: L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 2-43...
  • Page 58: Inputs

    Continuous current draw: 4 mA (when energized) CONTACT INPUTS WITH AUTO-BURNISHING 1000 Ω maximum Dry contacts: Wet contacts: 300 V DC maximum Selectable thresholds: 17 V, 33 V, 84 V, 166 V 2-44 L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 59: Power Supply

    Volt withstand: 2 × Highest Nominal Voltage for 10 ms Power consumption: typical = 15 to 20 W/VA maximum = 45 W/VA contact factory for exact order code consumption INTERNAL FUSE Ratings: L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 2-45...
  • Page 60: Outputs

    30 A as per ANSI C37.90 Carry continuous: Break (DC inductive, L/R = 40 ms): Voltage Current 24 V 48 V 0.5 A 125 V 0.3 A 250 V 0.2 A 2-46 L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 61 ±0.75% of full-scale for 0 to 1 mA range ±0.5% of full-scale for –1 to 1 mA range ±0.75% of full-scale for 0 to 20 mA range 99% Settling time to a step change: 100 ms Isolation: 1.5 kV L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 2-47...
  • Page 62: Communication Protocols

    PARALLEL REDUNDANCY PROTOCOL (PRP) (IEC 62439-3 CLAUSE 4, 2012) Ethernet ports used: 2 and 3 Networks supported: 10/100 Mb Ethernet OTHER TFTP, SFTP, HTTP, IEC 60870-5-104, Ethernet Global Data (EGD), IEEE C37.118 2-48 L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 63: Inter-relay Communications

    At extreme temperatures these values deviate based on component tolerance. On average, the output power decreases as the temperature is increased by a factor of 1 dB / 5 °C. L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 2-49...
  • Page 64: Cybersentry Security

    1 phasor metering page for each AC Source 5 tabular metering pages with dynamic metering and status event records page with dynamic update product information page settings, actual values, error messages (targets) 2-50 L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 65: Environmental

    95% (non-condensing) at 55°C (as per IEC60068-2-30 variant 1, 6 days) OTHER Altitude: 2000 m (maximum) Pollution degree: Overvoltage category: Ingress protection: IP20 front, IP10 back Noise: 0 dB L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 2-51...
  • Page 66: Type Tests

    Insulation: class 1, Pollution degree: 2, Over voltage cat II 1 Not tested by third party. 2.6.14 Production tests THERMAL Products go through an environmental test based upon an Accepted Quality Level (AQL) sampling process. 2-52 L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 67: Approvals

    Normally, cleaning is not required. When dust has accumulated on the front panel display, wipe with a dry cloth. To avoid deterioration of electrolytic capacitors, power up units that are stored in a de-energized state once per year, for one hour continuously. L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 2-53...
  • Page 68 SPECIFICATIONS CHAPTER 2: PRODUCT DESCRIPTION 2-54 L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 69: Installation

    For any issues, contact GE as outlined in the For Further Assistance section in chapter 1. Check that you have the latest copy of the L90 Instruction Manual and the UR Family Communications Guide, for the applicable firmware version, at http://www.gegridsolutions.com/multilin/manuals/index.htm...
  • Page 70: Panel Cutouts

    3.2.1 Horizontal units The L90 is available as a 19-inch rack horizontal mount unit with a removable front panel. The front panel can be specified as either standard or enhanced at the time of ordering. The enhanced front panel contains additional user-programmable pushbuttons and LED indicators.
  • Page 71 CHAPTER 3: INSTALLATION PANEL CUTOUTS Figure 3-1: Horizontal dimensions (enhanced front panel) Figure 3-2: Horizontal mounting (enhanced and graphical front panel) L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 72 PANEL CUTOUTS CHAPTER 3: INSTALLATION Figure 3-3: Horizontal mounting and dimensions (standard front panel) Figure 3-4: Horizontal dimension (graphical front panel) L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 73: Vertical Units

    3.2.2 Vertical units The L90 is available as a reduced size (¾) vertical mount unit, with a removable front panel. The front panel can be specified as either standard or enhanced at the time of ordering. The enhanced front panel contains additional user- programmable pushbuttons and LED indicators.
  • Page 74 PANEL CUTOUTS CHAPTER 3: INSTALLATION Figure 3-5: Vertical dimensions (enhanced front panel) L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 75 CHAPTER 3: INSTALLATION PANEL CUTOUTS Figure 3-6: Vertical and mounting dimensions (standard front panel) For side-mounting L90 devices with the enhanced front panel, see the following documents available on the UR DVD and the GE Grid Solutions website: • GEK-113180 —...
  • Page 76 PANEL CUTOUTS CHAPTER 3: INSTALLATION For side-mounting L90 devices with the standard front panel, use the following figures. Figure 3-7: Vertical side-mounting installation (standard front panel) L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 77 CHAPTER 3: INSTALLATION PANEL CUTOUTS Figure 3-8: Vertical side-mounting rear dimensions (standard front panel) L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 78: Rear Terminal Layout

    Two-slot wide modules take their slot designation from the first slot position (nearest to CPU module), indicated by an arrow marker on the terminal block. The figure shows an example of rear terminal assignments. 3-10 L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 79 Wire connections to these two modules at 13 inch-pounds. Figure 3-10: CPU modules and power supply The following figure shows the optical connectors for CPU modules. Figure 3-11: LC fiber connector (left) and ST fiber connector (right) L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 3-11...
  • Page 80: Wiring

    WIRING CHAPTER 3: INSTALLATION 3.3 Wiring 3.3.1 Typical wiring Figure 3-12: Typical wiring diagram (T module shown for CPU) 3-12 L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 81: Dielectric Strength

    The power supply module can be ordered for two possible voltage ranges, and the L90 can be ordered with or without a redundant power supply module option. Each range has a dedicated input connection for proper operation. The ranges are as follows (see the Specifications section of chapter 2 for details): •...
  • Page 82: Ct/vt Modules

    These modules have enhanced diagnostics that can automatically detect CT/VT hardware failure and take the relay out of service. CT connections for both ABC and ACB phase rotations are identical, as shown in the Typical Wiring Diagram. 3-14 L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 83 UR models. Substitute the tilde “~” symbol with the slot position of the module in the following figure. Figure 3-15: CT/VT module wiring L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 3-15...
  • Page 84: Process Bus Modules

    3.3.5 Process bus modules The L90 can be ordered with a process bus interface module. The module interfaces with the HardFiber Process Bus System, or HardFiber Brick, allowing bidirectional IEC 61850 fiber optic communications with up to eight HardFiber Bricks.
  • Page 85 Where a tilde “~” symbol appears, substitute the slot position of the module. Where a number sign “#” appears, substitute the contact number. L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 3-17...
  • Page 86 ~6a, ~6c 2 Inputs Fast Form-C ~7a, ~7c 2 Inputs ~7a, ~7c 2 Inputs ~7a, ~7c 2 Inputs Fast Form-C ~8a, ~8c 2 Inputs ~8a, ~8c 2 Inputs ~8a, ~8c 2 Inputs 3-18 L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 87 ~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 L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 3-19...
  • Page 88 WIRING CHAPTER 3: INSTALLATION Figure 3-17: Contact input and output module wiring (Sheet 1 of 2) 3-20 L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 89 CHAPTER 3: INSTALLATION WIRING Figure 3-18: Contact input and output module wiring (Sheet 2 of 2) For proper functionality, observe the polarity shown in the figures for all contact input and output connections. L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 3-21...
  • Page 90 L90 input even when the output is open, if there is a substantial distributed capacitance (represented by C1) present in the wiring between the output and the L90 input and the debounce time setting in the L90 relay is low enough.
  • Page 91 This operation of contact inputs also can be prevented by using the Auto-Burnish contact inputs or contact inputs with active impedance. Figure 3-21: Contact input connected to a contact output with resistor (R2) across the input L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 3-23...
  • Page 92 Eq. 3-2 The 2 mA current is used in case the contact input is connected across the GE Form A contact output with voltage monitoring. Otherwise use the amperage of the active circuit connected to the contact input when its contact output is open and the voltage across the contact input is third trigger threshold to calculate the resistor value.
  • Page 93 The auto-burnish feature can be disabled or enabled using the DIP switches found on each daughter card. There is a DIP switch for each contact, for a total of 16 inputs. L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 3-25...
  • Page 94 Contact inputs susceptible to parasitic capacitance caused by long cable runs affected by switching surges from external circuits can result in inadvertent activation of contact inputs with the external contact open. In this case, GE recommends using the contact I/O module with active impedance circuit.
  • Page 95: Transducer Inputs And Outputs

    The following figure illustrates the transducer module types (5A, 5C, 5D, 5E, and 5F) and channel arrangements that can be ordered for the relay. L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 3-27...
  • Page 96 WIRING CHAPTER 3: INSTALLATION Where a tilde “~” symbol appears, substitute the slot position of the module. Figure 3-25: Transducer input/output module wiring The following figure show how to connect RTDs. 3-28 L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 97: Rs232 Port

    EnerVista UR Setup software provided with the relay. Cabling for the RS232 port is shown in the following figure for both 9-pin and 25-pin connectors. The baud rate for this port can be set, with a default of 115200 bps. L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 3-29...
  • Page 98: Cpu Communication Ports

    3.3.9 CPU communication ports 3.3.9.1 Overview In addition to the front panel RS232 port, there is a rear RS485 communication port. The CPU modules do not require a surge ground connection. 3-30 L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 99 This common voltage is implied to be a power supply common. Some systems allow the shield (drain wire) to be used as common wire and to connect directly to the L90 COM terminal (#3); others function correctly only if the common wire is connected to the L90 COM terminal, but insulated from the shield.
  • Page 100: Irig-b

    IRIG-B is a standard time code format that allows stamping of events to be synchronized among connected devices. The IRIG-B code allows time accuracies of up to 100 ns. Using the IRIG-B input, the L90 operates an internal oscillator with 1 µs resolution and accuracy.
  • Page 101: Pilot Channel Communications

    3.4 Pilot channel communications A special inter-relay communications module is available for the L90. This module is plugged into slot “W” in horizontally mounted units and slot “R” in vertically mounted units. Inter-relay channel communications is not the same as 10/ 100Base-F interface communications (available as an option with the CPU module).
  • Page 102: Fiber: Led And Eled Transmitters

    PILOT CHANNEL COMMUNICATIONS CHAPTER 3: INSTALLATION All of the fiber modules use ST type connectors. For two-terminal applications, each L90 relay requires at least one communications channel. The current differential function must be “Enabled” for the communications module to properly operate. See the menu.
  • Page 103: Interface

    The following figure shows the typical pin interconnection between two G.703 interfaces. For the actual physical arrangement of these pins, see the Rear Terminal Layout section earlier in this chapter. All pin interconnections are to be maintained for a connection to a multiplexer. L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 3-35...
  • Page 104 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 inserted fully. 3-36 L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 105 (S1 = ON) and set timing mode to loop timing (S5 = OFF and S6 = OFF). The switch settings for the internal and loop timing modes are shown. L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 3-37...
  • Page 106 One source lies on the G.703 line side of the interface while the other lies on the differential Manchester side of the interface. Figure 3-39: G.703 dual loopback mode 3-38 L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 107: Rs422 Interface

    When used in single-channel applications, the RS422 interface links to higher-order systems in a typical way, observing transmit (Tx), receive (Rx), and send timing (ST) connections. However, when used in two-channel applications, certain L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 3-39...
  • Page 108 Figure 3-42: Timing configuration for RS422 two-channel, three-terminal application Data module 1 provides timing to the L90 RS422 interface via the ST(A) and ST(B) outputs. Data module 1 also provides timing to data module 2 TT(A) and TT(B) inputs via the ST(A) and AT(B) outputs. The data module pin numbers have been omitted in the figure because they vary by manufacturer.
  • Page 109: Two-channel Two-clock Rs422 Interface

    (SCC) receive clock. 3.4.5 Two-channel two-clock RS422 interface The two-channel two-clock RS422 interface (module 7V) is for use with the synchrophasor feature. The figure shows the module connections. L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 3-41...
  • Page 110: Rs422 And Fiber Interface

    G.703 and fiber interfaces. When using a laser interface, attenuators can be necessary to ensure that you do not exceed the maximum optical input power to the receiver. 3-42 L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 111: Ieee C37.94 Interface

    The UR-series C37.94 communication module can be connected to the electrical interface (G.703, RS422, or X.21) of a non- compliant digital multiplexer via an optical-to-electrical interface converter that supports the IEEE C37.94 standard. The following figure shows the concept. L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 3-43...
  • Page 112 5.60. For customers using firmware release 5.60 and higher, the module can be identified with "Rev D" printed on the module and is to be used on all ends of L90 communication for two and three terminal applications.
  • Page 113 Modules shipped since January 2012 have status LEDs that indicate the status of the DIP switches, as shown in the following figure. Figure 3-51: Status LEDs The clock configuration LED status is as follows: • Flashing green — loop timing mode while receiving a valid data packet L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 3-45...
  • Page 114: C37.94sm Interface

    5.60. For customers using firmware release 5.60 and higher, the module can be identified with "Rev D" printed on the module and is to be used on all ends of L90 communication for two and three terminal applications.
  • Page 115 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 inserted fully. L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 3-47...
  • Page 116 Modules shipped since January 2012 have status LEDs that indicate the status of the DIP switches, as shown in the following figure. Figure 3-54: Status LEDs The clock configuration LED status is as follows: • Flashing green — loop timing mode while receiving a valid data packet 3-48 L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 117: Activate Relay

    RELAY SETTINGS: NEW SETTING Not Programmed Programmed HAS BEEN STORED When the "NEW SETTING HAS BEEN STORED" message appears, the relay is in "Programmed" state and the "In Service" LED turns on. L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 3-49...
  • Page 118: Install Software

    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. The converter terminals (+, –, GND) are connected to the L90 communication module (+, –, COM) terminals. See the CPU Communication Ports section in chapter 3 for details.
  • Page 119: System Requirements

    Select the Web option to ensure the most recent software release, or select CD if you do not have an Internet connection, then click the Add Now button to list software items for the product. EnerVista Launchpad obtains the software from the Internet or DVD and automatically starts the installation program. L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 3-51...
  • Page 120: Add Device To Software

    3.7 Add device to software You connect remotely to the L90 through the rear RS485 or Ethernet port with a computer running the EnerVista UR Setup software. The L90 also can be accessed locally with a computer through the front panel RS232 port or the rear Ethernet port using the Quick Connect feature.
  • Page 121: Set Ip Address In Ur

    Online Window area, cannot be moved from it to another grouping, and needs to be renamed in the Device Setup window. GE instead recommends using the Device Setup window to add devices, as outlined here. 3.7.1 Set IP address in UR The IP and subnet addresses need to be added to the UR for Ethernet communication.
  • Page 122 ADD DEVICE TO SOFTWARE CHAPTER 3: INSTALLATION connections window. Or in Windows 7, access the Network and Sharing Center in the Control Panel. Right-click the Local Area Connection icon and select Properties. 3-54 L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 123 Select the Internet Protocol (TCP/IP) item from the list, and click the Properties button. Click the “Use the following IP address” box. Enter an IP address with the first three numbers the same as the IP address of the L90 relay and the last number different (in this example, 1.1.1.2).
  • Page 124 Minimum = 0ms, Maximum = 0ms, Average = 0 ms Pinging 1.1.1.1 with 32 bytes of data: verify the physical connection between the L90 and the computer, and double-check the programmed IP address in setting, then repeat step 2. Product Setup  Communications  Network  IP Address...
  • Page 125 Click the Quick Connect button to open the window. Select the Ethernet interface and enter the IP address assigned to the L90, then click the Connect button. The EnerVista UR Setup software creates a site named “Quick Connect” with a corresponding device also named “Quick Connect”...
  • Page 126: Configure Serial Connection

    For the RS232 connection, a computer with an RS232 port and a serial cable are required. To use the RS485 port at the back of the relay, a GE Grid Solutions F485 converter (or compatible RS232-to-RS485 converter) is required. See the F485 instruction manual for details.
  • Page 127: Configure Ethernet Connection

    SEL-2032. This option enables display of a terminal window to allow interaction with the other device. 11. Click the Read Order Code button to connect to the L90 and upload the order code to the software. If a communications error occurs, ensure that the EnerVista software serial communications values entered in the previous step correspond to the relay setting values, and also ensure that the same IP address is not assigned to multiple L90 ports.
  • Page 128 12. If using a gateway to connect to the device, select Yes from the drop-down list. 13. Click the Read Order Code button to connect to the L90 device and upload the order code. If the device was entered already, a message displays "Device ’x’ is also using IP address.." If a communications error occurs, ensure that the values entered in the previous steps correspond to the relay setting values, and also ensure that the same IP address is not assigned to multiple L90 ports.
  • Page 129: Configure Modem Connection

    CHAPTER 3: INSTALLATION ADD DEVICE TO SOFTWARE The device has been configured for Ethernet communications. Proceed to the Connect to the L90 section to begin communications. 3.7.4 Configure modem connection A modem connection allows a computer to communicate with a UR device over phone lines.
  • Page 130: Connect To The L90

    When unable to connect because of an "ACCESS VIOLATION," access Device Setup and refresh the order code for the device. When unable to connect, ensure that the same IP address is not assigned to multiple L90 ports, for example under Settings > Product Setup > Communications > Network.
  • Page 131: Use Quick Connect Via The Front Panel Rs232 Port

    Connect a nine-pin to nine-pin RS232 serial cable to the computer and the front panel RS232 port. Verify that the latest version of the EnerVista UR Setup software is installed (available from the GE EnerVista DVD or online from http://www.gegridsolutions.com/multilin). See the software installation section if not already installed.
  • Page 132: Use Quick Connect Via A Rear Ethernet Port

    Connect" and displays them in the Online Window. Expand the sections to view data directly from the L90 device. Use the Device Setup button to change the site name. Each time that the EnerVista software is initialized, click the Quick Connect button to establish direct communications to the L90.
  • Page 133: Set Up Cybersentry And Change Default Password

    IID — Instantiated IED capability description file — Actual settings on UR • CID — Configured IED description file — Settings sent to the UR (may or may not be actual settings) The import is done in the Offline Window area. L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 3-65...
  • Page 134: Connect To D400 Gateway

    3.11 Connect to D400 gateway A GE Multilin D400 Substation Gateway can be used to collect data from UR devices in a local area network (LAN). It collects metering, status, event, and fault report data from serial or LAN-based intelligent substation devices, and it pre-processes the data.
  • Page 135: Setting Files

    These are the configuration/settings files in the IEC 61850 SCL/IID format. The ur.iid file is saved with a "_YYMMDDhhmmss" retrieval time stamp, for example ur_170525183124.iid. It is stored in the D400 folder system using the UR site and device name. L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 3-67...
  • Page 136 CONNECT TO D400 GATEWAY CHAPTER 3: INSTALLATION 3-68 L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 137: Interfaces

    The EnerVista UR Setup software is provided with every L90. This chapter outlines the EnerVista software interface features. The EnerVista UR Setup Help File also provides details for getting started and using the software interface.
  • Page 138: Event Viewing

    IP Address IP Subnet Mask IP Routing When a settings file is loaded to a L90 that is in-service, the following sequence occurs: The L90 takes itself out of service. The L90 issues a UNIT NOT PROGRAMMED major self-test error.
  • Page 139: File Support

    Settings list / offline window area Software windows, with common toolbar Settings file data view windows, with common toolbar Workspace area with data view tabs Status bar 10. Quick action hot links L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 140: Protection Summary Window

    The Protection Summary is a graphical user interface to manage elements, such as enabling and disabling them. Access it under Settings > Protection Summary. See the Settings chapter for information on use. L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 141: Settings Templates

    Right-click the selected device or settings file and select the Template Mode > Create Template option. The settings file template is now enabled and the file menus displayed in light blue. A message displays. The settings file is now in template editing mode. L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 142 Figure 4-4: Settings template with all settings specified as locked Specify the settings to make viewable by clicking them. A setting available to view is displayed against a yellow background. L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 143 Select an installed device or a settings file from the left menu of the EnerVista UR Setup window. Apply the template by selecting the Template Mode > View In Template Mode option. L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 144 Once the template has been applied, users are limited to edit the settings specified by the template, but all settings are shown. The effect of applying the template to the phase time overcurrent settings is shown as follows. L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 145: Secure And Lock Flexlogic Equations

    4.1.8.1 Lock FlexLogic equations To lock individual entries of a FlexLogic equation: Right-click the settings file or online device and select the Template Mode > Create Template item to enable the settings template feature. L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 146 The effect of applying the template to the FlexLogic entries is shown here. Figure 4-10: Locking FlexLogic entries through settings templates The FlexLogic entries are also shown as locked in the graphical view and on the front panel display. 4-10 L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 147 Right-click the setting file in the offline window area and select the Edit Device Properties item. The window opens. Figure 4-12: Settings file properties window L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 4-11...
  • Page 148: Settings File Traceability

    When a settings file is transferred to a L90 device, the date, time, and serial number of the L90 are sent back to EnerVista UR Setup and added to the settings file on the local computer. This information can be compared with the L90 actual values at any later date to determine if security has been compromised.
  • Page 149 4.1.9.2 Online device traceability information The L90 serial number and file transfer date are available for an online device through the actual values. Select the Actual Values > Product Info > Model Information menu item within the EnerVista online window as shown in the example.
  • Page 150: Front Panel Interface

    The enhanced front panel consists of LED panels, an RS232 port, keypad, LCD display, control pushbuttons, and optional user-programmable pushbuttons. The front panel is hinged to allow access to removable modules inside the chassis. 4-14 L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 151 The standard front panel can be horizontal or vertical. The following figure shows the horizontal front panel. Figure 4-18: Standard horizontal front panel The following figure shows the vertical front panel for relays ordered with the vertical option. L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 4-15...
  • Page 152 The USB port is the square type B. User-programmable pushbuttons 9 to 16 can be programmed among the 10 pushbuttons on the left and right sides of the display. 4-16 L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 153: Front Panel Display

    The front panel can be viewed and used in the EnerVista software, for example to view an error message displayed on the front panel or the LEDs. To view the front panel in EnerVista software: Click Actual Values > Front Panel, then any option. L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 4-17...
  • Page 154 The footer dynamically labels the Tab, or control, pushbuttons immediately below. Page content displays between the header and footer. The pages are arranged for navigation in a hierarchical structure similar to that used for the enhanced and standard front panels. 4-18 L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 155 Active targets symbol. View error messages by pressing the Menu Tab pushbutton, then accessing the TARGETS menu. L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 4-19...
  • Page 156 Factory default names are SLD 1, SLD 2, and so on. Pages that have no configured content have a blank Tab pushbutton label, and the Tab pushbutton does nothing. The label for the current page has a blue background. 4-20 L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 157 Single-line diagram example The following example outlines how to create a circuit breaker diagram, then how to close the second circuit breaker. The figure shows six switches, two breakers, feeder, and ground. L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 4-21...
  • Page 158 Line Diagram Editor. Add the four switches for the top line by clicking the GE switch symbol in the toolbar, then clicking in the window. If the UR device is not online, the software attempts to connect. Double-click to edit properties. Rotate switches SW569 and SW5682 to 270 degrees.
  • Page 159 Add the two lower switches. Leave rotation at 0 degrees. Add the breakers by clicking the GE breaker symbol in the toolbar, then clicking in the window. Double-click to edit properties, rotating 90 degrees and setting the color to red (open).
  • Page 160 Load — Opens single-line diagram files, which replaces all five windows with that in the file To save drawings as a separate file, click File > Save As. The file is saved in the .mif format. 4-24 L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 161 Up to 32 static symbols can be used per single-line diagram. To add a symbol, click it in the toolbox, then click in the window. Double-click the symbol to open its properties window to set orientation. L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 4-25...
  • Page 162 Each breaker and each disconnect can be configured to use the UR-style symbols, IEC symbols, or simple square/slash symbols as shown in the following figure. The symbols assume horizontal symbol orientation, red - closed color, and green - open scheme. With vertical orientation, they are rotated 90 degrees. 4-26 L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 163 (horizontal or vertical), color scheme (red - closed, or red - open), and assigned side button (if any). If the selected breaker or disconnect element L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 4-27...
  • Page 164 A question mark displays in a symbol on the graphical front panel when status is bad. The question mark does not rotate with orientation. Figure 4-34: Symbols when status is bad The following figures show the orientation available for the static components. The default position is 0 degrees. 4-28 L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 165 CHAPTER 4: INTERFACES FRONT PANEL INTERFACE Figure 4-35: Single-line diagram static symbol orientation (sheet 1 of 2) L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 4-29...
  • Page 166 User-programmable pushbuttons 9 to 16 can be programmed among the 10 pushbuttons on the left and right sides of the screen display. They show dynamically and provide a means to perform the same control as a hardware user- programmable pushbutton. 4-30 L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 167 To add a metering component, click the M symbol in the toolbox, then click in the window. Drag it to its final location. Double-click it to open the properties window. The figure shows the properties that can be edited. L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 4-31...
  • Page 168 Self Reset, so the alarm displays in a solid color. The blue alarm type is Acknowledgeable, so the alarm flashes until it is acknowledged, for example by navigating with the arrow keys and pressing the ENTER button. The alarm then remains blue until the trigger condition is eliminated. 4-32 L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 169 Alarm types of each window can be configured as Self Reset, Latched, or Acknowledgeable. In Self Reset mode, the window lighting follows the state of the configured FlexLogic operand. The self-reset mode alarm sequence conforms to ISA-18.1-1979 (R2004) standard type A 4 5 6. L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 4-33...
  • Page 170 In Acknowledgeable mode, both Off to On and On to Off state changes in the configured operand cause the background to flash; the window must be acknowledged/reset to cancel flashing. This mode conforms to ISA-18.1-1979 (R2004) standard type R-6. 4-34 L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 171 The last window is not configured and displays blank/grey. In order for the Ethernet and battery alarms to work, the corresponding self-test alarms have been enabled under Settings > Product Setup > User-Programmable Self Tests (not shown). L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 4-35...
  • Page 172 AC source. They display on the graphical front panel using the Metering Tab pushbutton. The path to the editor is Settings > Product Setup > Graphical Panel > Metering Editor. 4-36 L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 173 Content to display is configured with the cell lines. The content can be actual values, a status indicator, or text. • Actual value — Select from the FlexAnalogs applicable to the L90, where a FlexAnalog is an analog parameter •...
  • Page 174: Front Panel Navigation Keys

    The decimal key initiates and advances to the next character in text edit mode or enters a decimal point. key can be pressed at any time for context-sensitive help messages. HELP 4-38 L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 175 Tab pushbutton — Five pushbuttons under the display. They navigate through the page hierarchy, and on some pages activate other actions. The display footer dynamically labels the page or action that is activated by the tab pushbutton. L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 4-39...
  • Page 176: Led Indicators

    “Enabled” or “Latched.” If a protection element target setting is “Enabled,” then the corresponding event-cause LEDs remain on as long as the operand associated with the element remains asserted. If a 4-40 L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 177 Support for applying a customized label beside every LED is provided. Default labels are shipped in the label package of every L90, together with custom templates. The default labels can be replaced by user-printed labels. User customization of LED operation is of maximum benefit in installations where languages other than English are used to communicate with operators.
  • Page 178 Default labels for LED panel 2 The default labels are intended to represent the following: • GROUP 1...6 — The illuminated GROUP is the active settings group • BREAKER 1(2) OPEN — The breaker is open 4-42 L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 179 TRIP — Indicates that the selected FlexLogic operand serving as a trip output has operated. This indicator latches; initiate the reset command to reset the latch. • ALARM — Indicates that the selected FlexLogic operand serving as an alarm output has operated L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 4-43...
  • Page 180: Front Panel Labelling

    NEUTRAL/GROUND — LED 14 — Indicates that neutral or ground was involved 4.2.5 Front panel labelling 4.2.5.1 Enhanced front panel The following procedure requires these pre-requisites: • The UR front panel label cutout sheet (GE part number 1006-0047) has been downloaded from http://www.gegridsolutions.com/products/support/ur/URLEDenhanced.doc and printed • Small-bladed knife To create custom LED and pushbuttons labels for the enhanced front panel: Start the EnerVista UR Setup software.
  • Page 181 LED labels. Use the tool with the printed side containing the GE part number facing the user. The label package shipped with every L90 contains the three default labels, the custom label template sheet, and the label removal tool.
  • Page 182 Bend the tab at the center of the tool tail as shown. To remove the LED labels from the L90 front panel and insert the custom labels: Use the knife to lift the LED label and slide the label tool underneath. Ensure that the bent tabs are pointing away from the relay.
  • Page 183 Slide the new LED label inside the pocket until the text is properly aligned with the LEDs, as shown. To remove the user-programmable pushbutton labels from the L90 front panel and insert the custom labels: Use the knife to lift the pushbutton label and slide the tail of the label tool underneath, as shown. Ensure that the bent L90 LINE CURRENT DIFFERENTIAL SYSTEM –...
  • Page 184 Remove the tool and attached user-programmable pushbutton label. Slide the new user-programmable pushbutton label inside the pocket until the text is properly aligned with the 4-48 L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 185 To create LED and pushbutton labels for a standard front panel: In the EnerVista software, if the L90 is not already listed in the Offline Window area, add it by right-clicking it and selecting the Add Device to Offline Window option.
  • Page 186 4.2.5.3 Graphical front panel The L90 includes software for labelling the LEDs and pushbuttons on the graphical front panel and a sticker sheet with pre- printed and blank labels. The pre-printed labels are on the top-left of the template sheet, and the blank labels are on the bottom-right.
  • Page 187: Menu Navigation

    Use the down, right, left, and up arrows to navigate the menu. The up and down arrow keys move within a group of headers, sub-headers, setting values, or actual MESSAGE L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 4-51...
  • Page 188 The Page Up and Page Down Tab pushbuttons also navigate through the list. When there is only a single page of options, they jump to the first and last entries. The options displayed depend on order code. 4-52 L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 189: Change Settings

    This flash message momentarily appears as confirmation of the storing process. Numerical values that contain decimal places are rounded-off if more decimal place digits are entered than specified by the step value. L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 4-53...
  • Page 190 An example is a confirmation message upon saving settings. This setting specifies how long to display the message. Press the Menu pushbutton to display the main menu. 4-54 L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 191 Figure 4-56: Main menu Use the Up or Down pushbutton to select SETTINGS, then press the Right or ENTER pushbutton. Figure 4-57: Settings menu With PRODUCT SETUP selected, press the Right or ENTER pushbutton. L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 4-55...
  • Page 192 As the FLASH MESSAGE TIME setting accepts a numerical value, a keypad displays. The time is to be changed to 4.0 seconds. 4-56 L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 193 The shift key (up arrow on keyboard) is green upon activation, while the keyboard letters switch to upper case. The globe key (shown greyed-out) toggles the keyboard language between English and another display language selected, for example between English and French. L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 4-57...
  • Page 194: View Actual Values

    Each phasor page has a name, which consists of the value of the SOURCE # NAME setting appended with " Phasors." Phasor pages that have no configured CTs or VTs do not have a Tab pushbutton, and phasor pages that have no configured cells cannot be displayed. 4-58 L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 195: Breaker Control

    4.2.9 Breaker control The L90 can interface with associated circuit breakers. In many cases the application monitors the state of the breaker, that can be presented on front panel LEDs, along with a breaker trouble indication. Breaker operations can be manually initiated from the front panel keypad or automatically initiated from a FlexLogic operand.
  • Page 196: Change Passwords

    The information in this section refers to password security. For information on how to set the password for the first time or change CyberSentry passwords, see the previous chapter or the Settings > Product Setup > Security > CyberSentry section in the next chapter. 4-60 L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 197 When entering a settings or command password via EnerVista or any serial interface, the user must enter the corresponding connection password. If the connection is to the back of the L90, the remote password must be used. If the connection is to the RS232 port of the front panel, the local password must be used.
  • Page 198: Logic Diagrams

    By default, when an incorrect Command or Setting password has been entered via the front panel three times within five minutes, the FlexLogic operand is set to “On” and the L90 does not allow settings or command level LOCAL ACCESS DENIED access via the front panel for five minutes.
  • Page 199: Flexlogic Design Using Engineer

    Works with all UR firmware versions The figure shows an example where several inputs are used to trigger an output. With the OR function, any one of the inputs can trigger the output. L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 4-63...
  • Page 200 This section explains how to use Engineer. It outlines the following topics: • Design logic • Send file to and from device • Monitor logic • View front panel • Generate connectivity report • Preferences 4-64 L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 201: Design Logic

    Preparation — Under Settings > Inputs/Outputs > Virtual Outputs, virtual outputs 3 and 4 are named DLTrigger Top logic — Seven-minute timer trigger Bottom logic — Turn on LED 9 for 10 seconds when the trigger starts L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 4-65...
  • Page 202 This procedure uses input / output logic as an example. To create a logic diagram: In the Offline Window area, access Engineer for the device, then Logic Designer. If the device is not listed, right-click 4-66 L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 203 Add the input blocks to the logic diagram. For example, click the I/O Tokens tab on the right, click the Input element, then click in the logic sheet to add it. Or drag-and-drop it. L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 4-67...
  • Page 204 Line option. The cursor needs to be at the connection point to end the line, not elsewhere on the block. Note that the outline color is no longer red on the blocks. 4-68 L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 205 The warning "input using disabled feature" means that input needs to be enabled. Double-click the block, click the View Associated Screen button, enable the setting, save, and recompile. The output and messages are explained in the next section. L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 4-69...
  • Page 206 IEC 61850 panel and thereby become synchronized. The CID file and the IID file (depending on the preference 'Do not update IID file when updating SCL files') are updated. If the CID file is not already there, it is generated. 4-70 L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 207 FLEXLOGIC DESIGN USING ENGINEER The location of these files is C:\ProgramData\GE Power Management\urpc, for example, in the Offline and Online folders. Any FlexLogic equations entered in the Offline Window area are erased. The logic drawn in the Logic Designer window in Engineer in the Offline Window area remain.
  • Page 208 Click the Ok button to save and exit from the window. In the logic diagram, select an element, then click in the drawing area to add it, click again to add a second box, and so on. 4-72 L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 209 Optimization Summary. Changes also display when the FlexLogic Equation Editor is accessed. The logic diagram does not change. In the example shown, no lines were saved to free up space. Figure 4-81: Code optimization results L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 4-73...
  • Page 210 Type in the second text string box, or select any of the 32 previous searches from the drop-down list. Click the Search button. Any results display. The search applies to all tabs, not just the active tab. Double-click a search result to view the item. 4-74 L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 211: Send File To And From Device

    When a window opens, select the device to which you want to send the file, then click the Send button and confirm. The order codes must match. The file is sent to the live device. Any errors can be viewed in the log file at the prompt. L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 4-75...
  • Page 212: Monitor Logic

    (green box outline). In this case, the battery is weak and needs to be replaced. This can be viewed as the Replace Battery message on the front panel of the device and in the EnerVista software under Actual Values > Front Panel > Front Panel or Display/Keypad. 4-76 L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 213: View Front Panel And Print Labels

    To save the report and labels, click File > Save As, enter a file name, and select the FPR, JPG, or PDF format. Use the instructions in the second tab of the window to add the labels to the physical device. L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 4-77...
  • Page 214: Generate Connectivity Report

    View > Toolbar > Advanced Actions — Active when in Logic Designer. Toggles a toolbar to nudge, rotate, flip, or change the order of an element. View > Show Unused Pins — Enable to display unconnected pins. Disable to eliminate unconnected pins from the view, for example when printing. 4-78 L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 215 File Information The text entered here displays at the bottom right of a diagram when printing, provided that the Show Title Block option is enabled. Note the option to change the logo from the GE logo to your company logo. Display The panel sets how the element boxes display.
  • Page 216 The software displays the color specified when an element is on. There is no color when the element is off. The software displays another color when the status cannot be determined and is unknown. 4-80 L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 217 Options display for filtering, such as recording timing for Virtual Inputs and Outputs, but not Communications Status. 4.4.6.4 COMTRADE waveforms Waveform files are viewable in the EnerVista software. The preferences are unrelated to Engineer and are outlined in the UR Family Communications Guide. L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 4-81...
  • Page 218: Toolbars

    4.4.7.2 Token Toolbox Drawing Tools Draw a line. Click and drag to draw. Draw multiple joined lines. Click and drag for each line. Double-click to finish. 4-82 L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 219 Input from another UR device. Teleprotection inputs/outputs and direct inputs/outputs are mutually exclusive and cannot be used simultaneously. Teleprotection inputs/outputs and direct inputs/outputs are mutually exclusive and cannot be used simultaneously. L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 4-83...
  • Page 220 Tag-In can is used to reference an existing Tag-Out. It joins another diagram to a previous diagram. Boolean Tokens These symbols are used to create FlexLogic Equations. Use them as intermediate logic for the Virtual Output equations. The display can vary from that shown here. 4-84 L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 221 Place a positive one shot and a negative one shot symbol in the Logic Designer diagram Place a timer in the Logic Designer diagram Elements These blocks configure properties of the element or use element operands as input to FlexLogic equations. L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 4-85...
  • Page 222 Set the width of the selected components to the same width as the reference component Same Height Set the height of the selected components to the same height as the reference component 4-86 L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 223 Front, Back Moves current components to the absolute front or back of all viewable layers Forward, Backward Moves current components on layer higher or lower than its original layer hierarchy L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 4-87...
  • Page 224 FLEXLOGIC DESIGN USING ENGINEER CHAPTER 4: INTERFACES 4-88 L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 225: Settings

     REAL TIME See page 5-108   CLOCK  FAULT REPORTS See page 5-113    OSCILLOGRAPHY See page 5-116    DATA LOGGER See page 5-118   L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 226 See page 5-214    LATCHES  SETTINGS  SETTING GROUP 1 See page 5-216   GROUPED ELEMENTS   SETTING GROUP 2     SETTING GROUP 3   L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 227 See page 5-420    DIRECT OUTPUTS See page 5-421    RESETTING See page 5-421     SETTINGS  DCMA INPUTS See page 5-422   TRANSDUCER I/O  L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 228: Overview

    For example, if CT1 = 300 / 5 A and CT2 = 100 / 1 A, then in order to sum these, CT2 is scaled to the CT1 ratio. In this case, the base quantity is 300 A primary, 5 A secondary for CT1, and 300/(100/1) = 3 A secondary for CT2. L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 229 Not every operand of a given element in a UR relay generates events, only the major output operands. Elements, asserting output per phase, log operating phase output only, without asserting the common three-phase operand event. L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 230: Introduction To Ac Sources

    Sources, in the context of L90 relays, refer to the logical grouping of current and voltage signals such that one source contains all the signals required to measure the load or fault in a particular power apparatus. A given source can 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.
  • Page 231 CTs through which any portion of the current for the element being protected could flow. Auxiliary CTs are required to perform ratio matching if the ratios of the primary CTs to be summed are not identical. In the L90, provisions have been included for all the current signals to be brought to the device where grouping, CT ratio correction, and summation are applied internally via configuration settings.
  • Page 232: Product Setup

    Password security — Basic security present by default • EnerVista security — Role-based access to various EnerVista software screens and configuration elements. The feature is present by default in the EnerVista software. L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 233 To reset the unit after a lost password: Email GE customer service at multilin.tech@ge.com with the serial number and using a recognizable corporate email account. Customer service provides a code to reset the relay to the factory defaults.
  • Page 234 When entering a settings or command password via EnerVista or any serial interface, the user must enter the corresponding connection password. If the connection is to the back of the L90, the remote password must be used. If the connection is to the RS232 port of the front panel, the local password must be used.
  • Page 235 When an original password has already been used, enter it in the Enter Password field and click the Send Password to Device button. Re-enter the password in the Confirm Password field. L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-11...
  • Page 236 INVALID ATTEMPTS BEFORE LOCKOUT The L90 provides a means to raise an alarm upon failed password entry. If password verification fails while accessing a password-protected level of the relay (either settings or commands), the FlexLogic operand is UNAUTHORIZED ACCESS asserted.
  • Page 237 ACCESS AUTH TIMEOUT immediately denied. If access is permitted and an off-to-on transition of the FlexLogic operand is detected, the timeout is restarted. The status of this timer updates every five seconds. L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-13...
  • Page 238 The EnerVista security system allows an administrator to manage access privileges of multiple users of EnerVista. It is disabled by default to allow access to the device immediately after installation. When security is disabled, all users have administrator access. GE recommends enabling the EnerVista security before placing the device in service. 5-14...
  • Page 239 If you force password entry by using this feature, ensure that you know the Administrator password. If you do not know the password and are locked out of the software, contact GE Grid Solutions for the default password of a UR device.
  • Page 240 The EnerVista security management system must be enabled (the Enable Security check box enabled) To modify user privileges: Select the Security > User Management item from the top menu to open the user management window. Locate the username in the User field. 5-16 L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 241 This feature requires a CyberSentry software option. See the Order Codes section in chapter 2 for details. The EnerVista software provides the means to configure and authenticate the L90 access using either a server or the device. Access to functions depends on user role.
  • Page 242 When the "Device" button is selected, the L90 uses its local authentication database and not the RADIUS server to authenticate the user. In this case, it uses built-in roles (Administrator, Engineer, Supervisor, Operator, Observer, or Administrator and Supervisor when Device Authentication is disabled), as login accounts and the associated passwords are stored on the L90 device.
  • Page 243 Figure 5-3: Security panel when CyberSentry installed For the Device > Settings > Product Setup > Supervisory option, the panel looks like the following. Figure 5-4: Supervisory panel For the Security panel, the following settings are available. L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-19...
  • Page 244 Administrator is to re-enable Device authentication when Device authentication is disabled. To re-enable Device authentication, the Supervisor unlocks the device for setting changes, and then the Administrator can re- enable Device authentication. 5-20 L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 245 Range: Administrator, Engineer, Supervisor,   None Operator, Factory (for factory use only), None  CHANGE LOCAL See page 5-22   PASSWORDS  SESSION See page 5-23   SETTINGS L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-21...
  • Page 246 • Observer — This role has read-only access to all L90 settings. This role allows unlimited concurrent access but it has no download access to any files on the device. Observer is the default role if no authentication has been done to the device.
  • Page 247 In Device authentication mode, the Observer role does not have a password associated with it. In Server authentication mode the Observer role requires a password. If you are locked out of the software, contact GE Grid Solutions for the default password. When using CyberSentry, the default password is "ChangeMe1#".
  • Page 248 SETTINGS  PRODUCT SETUP  SECURITY  SUPERVISORY  SELF TESTS  SELF TESTS  FAILED See below   AUTHENTICATE  FIRMWARE LOCK: Range: Enabled, Disabled  Enabled SETTINGS LOCK: Range: Enabled, Disabled  Enabled 5-24 L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 249 After making any required changes, log out. When changing settings offline, ensure that only settings permitted by the role that performs the settings download are changed because only those changes are applied. L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-25...
  • Page 250 If "System Integrity Recovery" events are logged during a restart of the unit due to an incorrect shutdown sequence, upgrade the firmware to version 7.31 or later to correct this issue. 5-26 L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 251: Display Properties

    CHAPTER 5: SETTINGS PRODUCT SETUP In addition to supporting syslog, a L90 with CyberSentry also saves the security events in two local security files, these being SECURITY_EVENTS.CSV and SETTING_CHANGES.LOG. Details on these files and how to retrieve them are available in the EnerVista software under Maintenance >...
  • Page 252 Some customers prefer very low currents to display as zero, while others prefer the current to display even when the value reflects noise rather than the actual signal. The L90 applies a cut-off value to the magnitudes and angles of the measured currents.
  • Page 253: Graphical Front Panel

    The path is Settings > Product Setup > Graphical Panel > Home Page. The menu does not display when there is no graphical front panel. L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-29...
  • Page 254 Whenever an annunciator window changes state this list is re-evaluated, which can result in the home page displaying a different annunciator page. The Tabular option displays a configured actual values/metering page. The Targets option displays error messages. 5-30 L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 255 If the display rolls, the rolling mode pages remain displaying regardless of the home page or rolling mode delay specified. Each page displays for a few seconds; duration cannot be set. The path is Settings > Product Setup > Graphical Panel > Rolling Mode. L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-31...
  • Page 256 Range: 1 to 10 in steps of 1 Default: 1 This setting specifies the number of rolling pages. During rolling mode, the graphical front panel displays pages from 1 to the selected number. 5-32 L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 257 Metering Tab pushbutton on the graphical front panel. The Metering Editor is not used. The figures show setup and preview for monitoring actual values in a table on the graphical front panel. L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-33...
  • Page 258 A maximum of eight Status Inputs can be used per metering page, and 16 in all metering pages. Select the metering input from the drop-down list. The options reflect the FlexLogic operands applicable to the L90. They are inputs for all five metering pages, not just the current page.
  • Page 259 Range: 24-bit color selector Default: Black Set the text color to display in the specified cell. BACK COLOR Range: 24-bit color selector Default: Grey Set the background color to display for the specified cell. L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-35...
  • Page 260 Range: 1 to 12 in steps of 1 Default: 1 This setting specifies the number of integers in the displayed metered value. It can be used to provide for leading character spacing of the display value. 5-36 L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 261 User-Programmable Self Tests (not shown). When the alarms are triggered, they display with a red background. An alarm is acknowledged by using the arrow keys on the graphical front panel then pressing the Enter button. L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-37...
  • Page 262 Range: up to 20 alphanumeric characters Default: Page 1...Page 8 Up to 20 characters can be input as the name of each annunciator page. The number of pages depends on the Layout. 5-38 L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 263 The background color to display for any triggered cell, for example when alarm is triggered. Configure Range: Configure Default: Configure The Configure button becomes active when the CONTENT field is set to "Actual" or "Mixed." The window configures metered values. L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-39...
  • Page 264 (such as wrong password), IRIG-B clock failure, or breaker trouble, the Event Records display. When a breaker opens, a single-line diagram displays. For the Ethernet and IRIG-B failure operation to work, these functions also have been enabled under Settings > Product Setup > User-Programmable Self Tests. 5-40 L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 265: Clear Relay Records

    SETTINGS  PRODUCT SETUP  CLEAR RELAY RECORDS  CLEAR RELAY CLEAR FAULT REPORTS: Range: FlexLogic operand   RECORDS CLEAR EVENT RECORDS: Range: FlexLogic operand  CLEAR OSCILLOGRAPHY: Range: FlexLogic operand  L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-41...
  • Page 266: Communications

    Selected records can be cleared from user-programmable conditions with FlexLogic operands. Assigning user- programmable pushbuttons to clear specific records is a typical application for these commands. Since the L90 responds to rising edges of the configured FlexLogic operands, they must be asserted for at least 50 ms to take effect.
  • Page 267 5.3.5.3 Ethernet network topology The L90 has three Ethernet ports. Each Ethernet port must belong to a different network or subnetwork. Configure the IP address and subnet to ensure that each port meets this requirement. Two subnets are different when the bitwise AND operation performed between their respective IP address and mask produces a different result.
  • Page 268 SCADA is provided through LAN2. P2 and P3 are connected to LAN2, where P2 is the primary channel and P3 is the redundant channel. In this configuration, P3 uses the IP and MAC addresses of P2. 5-44 L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 269 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 5-15: Multiple LANS, no redundancy L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-45...
  • Page 270 IP addresses and mask. Configure the network IP and subnet settings before configuring the routing settings. To obtain a list of all port numbers used, for example for audit purposes, contact GE technical support with substantiating information, such as the serial number and order code of your device.
  • Page 271 2 is performed. The delay in switching back ensures that rebooted switching devices connected to the L90, which signal their ports as active prior to being completely functional, have time to completely initialize themselves and become active. Once port 2 is active again, port 3 returns to standby mode.
  • Page 272 UR 7 redundancy Failover is selected for redundancy. 5.3.5.6 Parallel Redundancy Protocol (PRP) The L90 is provided with optional PRP capability. This feature is specified as a software option at the time of ordering. See the Order Codes section in chapter 2 for details.
  • Page 273 Delete the default route by replacing the default gateway with the default value of 127.0.0.1. General conditions to be satisfied by static routes The following rules are validated internally: L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-49...
  • Page 274 Port 2 (IP address 10.1.2.2) connects the UR to LAN 10.1.2.0/24 and to the EnerVista software through Router2. Router2 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: 5-50 L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 275  MODBUS PROTOCOL MODBUS SLAVE Range: 1 to 254 in steps of 1   ADDRESS: 254 MODBUS TCP PORT Range: 0 to 65535 in steps of 1  NUMBER(502): 502 L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-51...
  • Page 276 0 disables Modbus over TCP/IP, meaning closes the Modbus TCP port. When the port number is changed to 0, the change takes effect when the L90 is restarted. When it is set to 0, use the front panel or serial port to communicate with the relay.
  • Page 277 Range: 0 to 65519 in steps of 1  DEST ADDRESS: 1 DNP CURRENT SCALE Range: 0.001, 0.01. 0.1, 1, 10, 100, 1000, 10000,  FACTOR: 1 100000, 1000000, 10000000, 100000000 L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-53...
  • Page 278 Range: 0 to 32 in steps of 1  CONTROL POINTS: 0 DNP TCP CONNECTION Range: 10 to 7200 s in steps of 1  TIMEOUT: 120 s DNP EVENT TIME BASE: Range: UTC, LOCAL  LOCAL 5-54 L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 279 DNP ADDRESS unique address to each DNP slave. The L90 can specify a maximum of five clients for its DNP connections. These are IP addresses for the controllers to which the L90 can connect. The settings follow. SETTINGS  PRODUCT SETUP  COMMUNICATIONS  DNP PROTOCOL  DNP NETWORK CLIENT ADDRESSES ...
  • Page 280 DNP TCP connection for greater than the time specified by this setting, the connection is aborted by the L90. This frees up the connection to be re-used by a client. For any change to take effect, restart the relay.
  • Page 281 60870-5-104 point lists must be in one continuous block, any points assigned after the first “Off” point are ignored. 5.3.5.12 IEC 61850 protocol The L90 is provided with optional IEC 61850 communications. This feature is specified as a software option at the time of ordering. See the Order Codes section in chapter 2 for details.
  • Page 282 The maximum number of simultaneous clients supported by the UR family is five. EnerVista setup for IEC 61850 The EnerVista UR Setup software provides the interface to configure L90 settings for the IEC 61850 protocol. This section describes this interface. The software also supports import/export and merging of IEC 61850 Substation Configuration Language (SCL) files as documented in the UR Family Communications Guide.
  • Page 283 Figure 5-19: IEC 61850 panel Opening the IEC 61850 window while online causes the UR Setup software to retrieve and import an SCL file from the L90. This System Configuration Description (SCD) file contains all the settings in the UR at the time of the file request, both those that are mapped into the IEC 61850 information model (that is, the "public"...
  • Page 284 When the Save button is clicked in the online IEC 61850 window, UR Setup software prepares a configured IED description (CID) file containing all the settings of the UR and sends the CID file to the L90. Upon receipt, the L90 checks the CID file for correctness, going out of service, then back into service when the CID file is accepted.
  • Page 285 Range: status-only, direct-with-normal-security, sbo-with-normal-security Default: sbo-with-normal-security This setting specifies the control service that clients must use to control the TEST MODE FUNCTION of the L90. An "on" control to <LDName>/LLN0.Mod changes TEST MODE FUNCTION to Disabled, an "on-blocked" control changes it to Forcible, and a "test/blocked"...
  • Page 286 The LLN0 in the Master logical device, which includes setting group, GOOSE and report control blocks, and datasets • LPHD1 — Models common issues for physical devices • GGIO1 — For unmapped FlexLogic operands 5-62 L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 287 Figure 5-23: Menu for logical node If the insert option is selected, or the edit option is selected for other than the Master logical device, a logical device parameters edit dialog opens. L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-63...
  • Page 288 Each logical device inst name is required to be unique within the device, and it cannot be blank. Also, if the corresponding functional ldName setting is blank, the concatenation of the IED name and the logical device 5-64 L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 289 The UR increments the value of paramRev by one whenever one or multiple setting changes occurs in one Modbus write request by any means (front panel, Modbus, or MMS) other than by SCL file L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-65...
  • Page 290 A v7.4 device can send an R-GOOSE message to another v7.4 device when both have R-GOOSE active as the protocol • A v7.4 device can send a GOOSE message to another v7.4 device when both have GOOSE active as the protocol 5-66 L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 291 Navigate to Settings > Product Setup > Communications > IEC 61850 > GOOSE > TxGOOSE > TxGOOSE1 to access the settings for the first TxGOOSE. The settings and functionality for the others are similar. L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-67...
  • Page 292 Range: 0 to 129 VisibleString characters Default: TxGOOSE1 The entered value sets the goID value published in TxGOOSE1 messages, and can be used by subscribers to discriminate the TxGOOSE1 messages from other GOOSE messages. 5-68 L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 293 VID values of 0 and 1 are assigned by IEEE 802.1Q to other functions and are not to be used for GOOSE. L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-69...
  • Page 294 Also, Port 3 configuration in the CID file is ignored. The Port 3 ConnectedAP elements has no meaning, as ports 2 and 3 use the port 2 MAC address, IP address, and mask. 5-70 L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 295 (test field in edition 1.0 messages) are accepted only when the UR Test Mode Function setting is set to Forcible or Isolated. RxGOOSE messages can be received through any UR Ethernet port. L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-71...
  • Page 296 RxGOOSE1 messages. An entered address of zero disables RxGOOSE1. If the publisher is a UR series 7.3x device, the setting needs to match the value of the publisher’s TxGOOSE DST MAC setting. 5-72 L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 297 <GoCBName> is the name of the publishing control block. The L90 translates the ACSI format required for this setting to the MMS format used in GOOSE messages: <LDName>/LLN0$GO$<GoCBName> If the publisher is a UR 7.3x or 7.40 series device, <LDName> is the value of the publisher's Master functional ldName setting if that setting is not empty, otherwise it is the value of the publisher's IED NAME suffixed with "Master".
  • Page 298 7.40 UR Setup RxGOOSE Inputs pages. In this case the Member setting displays as the product-related name used by the publishing IED of the data object or data attribute, in standard SCSM format (e.g. Publisher1LD1/LLN0$ST$Off$stVal). 5-74 L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 299 (supported in version 7.40 and later). When the file format is SCD, the system lists all IEDs inside the SCD file and lets the user select the ones to add. The figure shows a selection being made by importing a CID file using the Add IED function. L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-75...
  • Page 300 This setting selects the logic state for the RxGOOSE Boolean1 FlexLogic operand if the UR has just completed startup and the selected RxGOOSE has not yet received a message, or the selected RxGOOSE has lost its connectivity with the publisher. The following choices are available: 5-76 L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 301 Default: None This setting selects the GOOSE message containing the value that drives the RxGOOSE DPS1 FlexLogic operand. If set to None, the RxGOOSE DPS1 FlexLogic operand assumes its default state. L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-77...
  • Page 302 (supported in version 7.40 and later). When the file format is SCD, the system lists all IEDs inside the SCD file and lets the user select the ones to add. Figure 5-31: RxGOOSE Analog Inputs panel There are 32 RxGOOSE analog inputs. 5-78 L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 303 Range: 0.000 to 1000000000.000 in steps of 0.001 Default: 1.000 This setting specifies the per-unit base value for other L90 features to use with the RxGOOSE Analog1 operand. A FlexElement for instance subtracts two quantities after converting their values to integers rescaled to a common base, the common base being the largest of the base values of the two quantities.
  • Page 304 RptEna attribute is false. Buffered and unbuffered reports Navigate to Settings > Product Setup > Communications > IEC 61850 > Reports > Buffered Reports or Unbuffered Reports. 5-80 L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 305 Also, the control block can be configured to send integrity reports containing the present value of all members either on demand from the client or periodically. A TCP handshaking mechanism causes messages that are not read and acknowledged by the client to be retransmitted. L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-81...
  • Page 306 Control blocks and data sets can be pre-configured by sending the L90 a CID file. See the UR Family Communications Guide for details. EnerVista UR Setup also can be used to select the data set members and to pre-configure the control blocks.
  • Page 307 This setting selects the data set whose members' status is reported in Unbuffered Report1 messages using the UR Setup software designator for the data set. The IEC 61850 name of the data sets are configured in the Datasets panel, as described later. L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-83...
  • Page 308 DataSets Navigate to Settings > Product Setup > Communications > IEC 61850 > DataSets. 5-84 L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 309 The DataSet name is not copied or pasted. In short, use this feature to copy a DataSet Member setting and paste it into another Member setting, a text file, or Word, as examples. L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-85...
  • Page 310 Select the member from the drop-down list. Or right-click an entry to copy, paste, delete, or insert. Product setup Navigate to Settings > Product Setup > Communications > IEC 61850 > Product Setup. 5-86 L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 311 Deadband parameters of measured values related to the Energy metering are configured here. Real Time Clock Navigate to Settings > Product Setup > Communications > IEC 61850 > Product Setup > Real Time Clock. L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-87...
  • Page 312 However, a tabulation of the analog values and their associated deadband setting can be found in the UR Family Communications Guide. 5-88 L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 313 Auxiliary voltage — 275 x auxiliary VT ration setting • Power (real, reactive, apparent, 3-phase, and 1-phase) — 4 × phase CT primary setting × 1.5 × VT Secondary setting × VT ratio setting L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-89...
  • Page 314 While the selected operand is asserted, Bkr0XCBR1.Loc.stVal is true and IEC 61850 commands to BkrCSWI1.Pos and Bkr0XCBR1.Pos are not accepted, and a Negative Response (-Rsp) is issued with the REASON CODE of Blocked-by- switching-hierarchy. 5-90 L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 315 Bkr0XCBR1.BlkOpn.ctlVal signal on the Breaker Control Logic (Sheet 1 of 2) diagram in the Settings > System Setup section later. This signal when true blocks breaker 1 trip control while the operand selected by setting XCBR1 ST.LOC OPERAND is not active. L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-91...
  • Page 316 Navigate to Settings > Product Setup > Communications > IEC 61850 > System Setup > Switches > Switch 1 to access the settings that configure the IEC 61850 protocol interface with the first disconnect switch control and status monitoring element. The settings and functionality for the others are similar. 5-92 L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 317 > System Setup section later. These signals force a disconnect switch trip or close control while the operand selected by setting XSWI1 ST.LOC OPERAND is not active. "sbo" here is select-before-operate. Enhanced security means that the L90 reports to the client the disconnect switch 1 position the end of the command sequence.
  • Page 318 SelectEditSG. The setting related to these IEC 61850 commands are described here. Navigate to Settings > Product Setup > Communications > IEC 61850 > Control Elements > Setting Groups to access the setting that configures the IEC 61850 setting group commands. 5-94 L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 319 Navigate to Settings > Product Setup > Communications > IEC 61850 > Settings for Commands to access the settings that configure the IEC 61850 protocol interface for record clear commands. Figure 5-43: Commands panel L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-95...
  • Page 320 This setting selects the control model clients must use to successfully control the command CLEAR FAULT REPORTS. "sbo" here is select-before-operate. Enhanced security means that the L90 reports to the client the breaker 1 position at the end of the command sequence.
  • Page 321 Navigate to Settings > Product Setup > Communications > IEC 61850 > GGIO > GGIO2 to access the settings that configure the IEC 61850 protocol interface for Virtual Input commands. Figure 5-45: GGIO2 panel L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-97...
  • Page 322 <LDName>/GGIO4.AnIn01.instMag.f. The value of the FlexAnalog operand is converted automatically to the format and scaling required by the standard, that is to say primary amperes, primary volts, and so on. See Appendix A for a list of FlexAnalog operands. 5-98 L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 323 File transfer by IEC 61850 The L90 supports file transfer by IEC 61850. The approach is as follows, using the SISCO AX-S4 61850 client software as an example. In the AX-S4 61850 Explorer window, click the Tools menu and access the SISCO File Transfer Utility.
  • Page 324 NUMBER(80): 80 The L90 contains an embedded web server and can display pages in a web browser. The web pages are organized as a series of menus that can be accessed starting at the L90 “Main Menu.” Web pages are read-only and are available showing DNP and IEC 60870-5-104 points lists, Modbus registers, event records, fault reports, and so on.
  • Page 325 NUMBER: 0 The Trivial File Transfer Protocol (TFTP) can be used to transfer files from the L90 over a network. The L90 operates as a TFTP server. TFTP client software is available from various sources, including Microsoft Windows NT. The dir.txt file obtained from the L90 contains a list and description of all available files, for example event records and oscillography.
  • Page 326 COMMUNICATIONS  PROTOCOL connected to a maximum of two masters (usually either an RTU or a SCADA master station). Since the L90 maintains two sets of IEC 60870-5-104 data change buffers, ideally no more than two masters actively communicate with the L90 at one time.
  • Page 327 PTP, or SNTP, its time is overwritten by these three sources, if any of them is active. If the synchronization timeout occurs and none of IRIG-B, PTP, or SNTP is active, the L90 sets the invalid bit in the time stamp of a time-tagged message.
  • Page 328 Spontaneous transmission occurs as a response to cyclic Class 2 requests. If the L90 wants to transmit Class 1 data at that time, it demands access for Class 1 data transmission (ACD=1 in the control field of the response).
  • Page 329 INFORMATION NUMBER (INF) as defined in IEC 60870-103. For any change to take effect, restart the relay. — This is the cyclic period used by the L90 to decide when a measurand ASDU is included in a SCAN TIMEOUT (SCAN TOUT) response.
  • Page 330 FlexAnalog operands. The measurands sent are voltage, current, power, power factor, and frequency. If any other FlexAnalog is chosen, the L90 sends 0 instead of its value. Note that the power is transmitted in KW, not W. Measurands are transmitted as ASDU 3 or ASDU 9 (type identification value set to measurands I, respectively measurands II).
  • Page 331 Commands are received as General Command (Type Identification 20). The user can configure the action to perform when an ASDU command comes. A list of available mappings is provided on the L90. This includes 64 virtual inputs (see the following table). The ON and OFF for the same ASDU command can be mapped to different virtual inputs.
  • Page 332: Modbus User Map

    ADDRESS The UR Family Communications Guide outlines the Modbus memory map. The map is also viewable in a web browser; enter the IP address of the L90 in a web browser and click the option. 5.3.7 Real-time clock 5.3.7.1 Menu SETTINGS ...
  • Page 333 FlexLogic operand is CLOCK UNSYNCHRONIZED activated. When the L30/L90 channel asymmetry function is used, the relay’s real time clock must be synchronized to an external time source using PTP or IRIG-B, typically from a global positioning system (GPS) receiver. setting displays when the relay includes the IEEE 1588 software option. The setting configures...
  • Page 334 See the Order Codes section in chapter 2 for details. The L90 supports the Precision Time Protocol (PTP) specified in IEEE Std 1588 2008 using the Power Profile (PP) specified in IEEE Std C37.238 2011. This enables the relay to synchronize to the international time standard over an Ethernet network that implements PP.
  • Page 335 Range: Enabled, Disabled  Disabled  SNTP SERVER IP ADDR: Range: standard IP address format  0.0.0.0 SNTP UDP PORT Range: 1 to 65535 in steps of 1  NUMBER: 123 L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-111...
  • Page 336 L90 clock is closely synchronized with the SNTP/ NTP server. It takes up to two minutes for the L90 to signal an SNTP self-test error if the server is offline.