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GE L30 Instruction Manual

Line current differential system.
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GE
Grid Solutions
L30
Line Current Differential System
Instruction Manual
Product version: 7.4x
GE publication code: 1601-9050-AE3 (GEK-130983B)
E83849
LISTED
IND.CONT. EQ.
52TL
1601-9050-AE3

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  • Page 1 Grid Solutions Line Current Differential System Instruction Manual Product version: 7.4x GE publication code: 1601-9050-AE3 (GEK-130983B) E83849 LISTED IND.CONT. EQ. 52TL 1601-9050-AE3...
  • 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

    Inputs ............................2-35 2.6.6 Power supply ........................2-36 2.6.7 Outputs............................2-36 2.6.8 Communication protocols....................2-39 2.6.9 Inter-relay communications..................2-40 2.6.10 CyberSentry security......................2-41 2.6.11 Environmental........................2-41 2.6.12 Type tests ..........................2-42 2.6.13 Production tests ........................2-42 2.6.14 Approvals ..........................2-43 2.6.15 Maintenance.........................2-43 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 4 Settings files ..........................4-1 4.1.3 Event viewing..........................4-2 4.1.4 File support ..........................4-3 4.1.5 EnerVista main window .....................4-3 4.1.6 Protection summary window..................4-4 4.1.7 Settings templates........................4-5 4.1.8 Secure and lock FlexLogic equations ................4-9 4.1.9 Settings file traceability....................4-12 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 5 Remote resources configuration ................5-117 System setup ....................5-118 5.5.1 AC inputs ..........................5-118 5.5.2 Power system........................5-119 5.5.3 Signal sources........................5-120 5.5.4 87L power system......................5-123 5.5.5 Breakers..........................5-130 5.5.6 Disconnect switches ......................5-135 5.5.7 FlexCurves...........................5-138 5.5.8 Phasor Measurement Unit ..................5-145 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 6 Phasor Measurement Unit test values..............5-297 5.11.4 Force contact inputs ..................... 5-298 5.11.5 Force contact outputs ....................5-299 5.11.6 Channel tests ........................5-299 6 ACTUAL VALUES Actual Values menu..................6-1 Front panel......................6-3 Status......................... 6-4 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 7 Set date and time......................... 7-3 7.1.4 Relay maintenance......................7-3 7.1.5 Phasor Measurement Unit one-shot................7-4 7.1.6 Security ............................. 7-6 Targets menu ....................7-6 7.2.1 Target messages ........................7-6 7.2.2 Relay self-tests ........................7-7 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 8 10.1.20 Relay synchronization....................10-16 10.2 Operating condition characteristics............10-17 10.2.1 Description ......................... 10-17 10.2.2 Trip decision example ....................10-19 10.2.3 Trip decision test ......................10-19 10.3 Fault locator ....................10-20 10.3.1 Description ......................... 10-20 viii L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 9 A.1 FlexAnalog items .....................A-1 OPERANDS B RADIUS SERVER B.1 RADIUS server configuration ................. B-1 CONFIGURATION C COMMAND LINE C.1 Command line interface .................C-1 INTERFACE D MISCELLANEOUS D.1 Warranty ......................D-1 D.2 Revision history ....................D-1 ABBREVIATIONS INDEX L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 10 TABLE OF CONTENTS L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 11: Introduction

    Ensure that the control power applied to the device, the AC current, and voltage input match the ratings specified on the relay nameplate. Do not apply current or voltage in excess of the specified limits. L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 12: For Further Assistance

    Worldwide e-mail: multilin.tech@ge.com Europe e-mail: multilin.tech.euro@ge.com 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. L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 13 CHAPTER 1: INTRODUCTION FOR FURTHER ASSISTANCE Figure 1-1: Generate service report L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 14 FOR FURTHER ASSISTANCE CHAPTER 1: INTRODUCTION L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 15: Product Description

    2.1 Product description 2.1.1 Overview The L30 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. The L30 is intended to provide complete protection for transmission lines of any voltage level. Both three phase and single phase tripping schemes are available.
  • Page 16 CHAPTER 2: PRODUCT DESCRIPTION standard web browser (L30 web pages). The IEC 60870-5-104 protocol is supported on the Ethernet port. The Ethernet port also supports the Parallel Redundancy Protocol (PRP) of IEC 62439-3 (clause 4, 2012) when purchased as an option.
  • Page 17: Features

    VT fuse failure 2.1.2 Features 2.1.2.1 Line current differential • Phase segregated, high-speed digital current differential system • Overhead and underground AC transmission lines, series compensated lines • Two-terminal and three-terminal line applications L30 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

    (DTT) signal to all of the other L30 relays on the protected line. If a slave L30 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.
  • Page 20 Receives current phasor information from all relays • Performs the current differential algorithm • Sends a current differential DTT signal to all L30 relays on the protected line In the peer-to-peer mode, all L30 relays act as masters. L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 21: Channel Monitor

    2.2.2 Channel monitor The L30 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 L30 supports password entry from a local or remote connection. Local access is defined as any access to settings or commands via the faceplate interface. This includes both keypad entry and the through the faceplate RS232 port. Remote access is defined as any access to settings or commands via any rear communications port.
  • Page 23 See table notes See table notes |--------------- Display Properties |--------------- Clear Relay Records (settings) |--------------- Communications |--------------- Modbus User Map |--------------- Real Time Clock |--------------- Oscillography |--------------- Data Logger |--------------- Demand |--------------- User-Programmable LEDs L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 24 |---------- Set Date and Time User Displays Targets Actual Values |---------- Front panel labels designer |---------- Status |---------- Metering |---------- Transducer I/O |---------- Records |---------- Product Info Maintenance |---------- Modbus Analyzer 2-10 L30 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 L30 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. If R-GOOSE security is required, the CyberSentry software option also must be purchased. 2.4.1 Order codes with enhanced CT/VT modules Table 2-4: L30 order codes for horizontal units - * ** - * *...
  • Page 27 French display with 4 small and 12 large programmable pushbuttons Russian display with 4 small and 12 large programmable pushbuttons Chinese display with 4 small and 12 large programmable pushbuttons Enhanced front panel with English display L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 2-13...
  • Page 28 Channel 1 - RS422; Channel 2 - 1300 nm, single-mode, Laser Channel 1 - G.703; Channel 2 - 1300 nm, single-mode Laser G.703, 1 Channel G.703, 2 Channels RS422, 1 Channel RS422, 2 Channels, 2 Clock Inputs 7W RS422, 2 Channels 2-14 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 29 CHAPTER 2: PRODUCT DESCRIPTION ORDER CODES Table 2-5: L30 order codes for reduced-size vertical units - * * * - F ** - H ** - L ** - N ** - R ** Reduced Size Vertical Mount BASE UNIT...
  • Page 30 IEEE C37.94, 820 nm, 128 kbps, multimode, LED, 1 Channel IEEE C37.94, 820 nm, 128 kbps, multimode, LED, 2 Channels Channel 1 - IEEE C37.94, MM, 64/128 kbps; Channel 2 - 1300 nm, single-mode, Laser 2-16 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 31: 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: L30 order codes for horizontal units with process bus - * ** - * * * - F **...
  • Page 32 English display with 4 small and 12 large programmable pushbuttons French display with 4 small and 12 large programmable pushbuttons Russian display with 4 small and 12 large programmable pushbuttons Chinese display with 4 small and 12 large programmable pushbuttons 2-18 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 33 7Q Channel 1 - G.703; Channel 2 - 1300 nm, single-mode Laser G.703, 1 Channel G.703, 2 Channels RS422, 1 Channel RS422, 2 Channels, 2 Clock Inputs 7W RS422, 2 Channels L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 2-19...
  • Page 34 ORDER CODES CHAPTER 2: PRODUCT DESCRIPTION Table 2-7: L30 order codes for reduced-size vertical units with process bus - * ** - * * * - F ** - H ** - L ** - N ** - R **...
  • Page 35 Channel 1 - G.703; Channel 2 - 1550 nm, single-mode Laser 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 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 2-21...
  • Page 36: Replacement Modules

    Replacement modules can be ordered separately. When ordering a replacement CPU module or faceplate, provide the serial number of your existing unit. Not all replacement modules apply to the L30 relay. The modules specified in the order codes for the L30 are available as replacement modules for the L30.
  • Page 37 Channel 1 - G.703; Channel 2 - 820 nm, multimode Channel 1 - G.703; Channel 2 - 1300 nm, multimode Channel 1 - G.703; Channel 2 - 1300 nm, single-mode ELED 820 nm, multimode, LED, 2 Channels L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 2-23...
  • Page 38: 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. 2-24 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 39 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. L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 2-25...
  • Page 40: 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. 2-26 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 41: Protection Elements

    > 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 42 0.1 to 2.0 x CT rating ±1.5% of reading > 2.0 x 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...
  • Page 43 97 to 98% of pickup Level accuracy: ±0.5% of reading from 10 to 208 V Pickup delay: 0 to 600.00 s in steps of 0.01 Reset delay: 0 to 600.00 s in steps of 0.01 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 2-29...
  • Page 44 CT/VT module (not including 8Z modules) Pickup level: 0.1 to 10.00 pu in steps of 0.01 Reset delay: 0.000 to 65.535 s in steps of 0.001 Operating mode: number of counts, counts per time window 2-30 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 45: 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 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 2-31...
  • Page 46 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 2-32 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 47: Monitoring

    IEEE C37.118 or IEC 61850-90-5 standard Number of channels: 14 synchrophasors, 8 analogs, 16 digitals TVE (total vector error): <1% Triggering: frequency, voltage, current, power, rate of change of frequency, user-defined L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 2-33...
  • Page 48: Metering

    ±0.001 Hz (when voltage signal is used for frequency measurement) I = 0.1 to 0.25 pu: ±0.005 Hz I > 0.25 pu: ±0.02 Hz (when current signal is used for frequency measurement) 2-34 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 49: Inputs

    379 Ω ±10% Conversion range: –1 to + 20 mA DC Accuracy: ±0.2% of full scale Type: Passive RTD INPUTS Types (3-wire): 100 Ω Platinum, 100 and 120 Ω Nickel, 10 Ω Copper L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 2-35...
  • Page 50: Power Supply

    4 A / 250 V Interrupting capacity: 100 000 A RMS symmetrical 10 000 A 2.6.7 Outputs FORM-A RELAY Make and carry for 0.2 s: 30 A as per ANSI C37.90 Carry continuous: 2-36 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 51 48 V 0.5 A 125 V 0.3 A 250 V 0.2 A Operate time: < 8 ms Contact material: silver alloy FAST FORM-C RELAY Make and carry: 0.1 A max. (resistive load) L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 2-37...
  • Page 52 99% Settling time to a step change: 100 ms Isolation: 1.5 kV Driving signal: any FlexAnalog quantity Upper and lower limit for the driving signal: –90 to 90 pu in steps of 0.001 2-38 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 53: 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 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 2-39...
  • Page 54: 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. 2-40 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 55: Cybersentry Security

    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 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 2-41...
  • Page 56: Type Tests

    Insulation: class 1, Pollution degree: 2, Over voltage cat II 1 Not tested by third party. 2.6.13 Production tests THERMAL Products go through an environmental test based upon an Accepted Quality Level (AQL) sampling process. 2-42 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 57: Maintenance

    Normally, cleaning is not required. When dust has accumulated on the faceplate 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. L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 2-43...
  • Page 58 SPECIFICATIONS CHAPTER 2: PRODUCT DESCRIPTION 2-44 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 59: Installation

    For any issues, contact GE Grid Solutions as outlined in the For Further Assistance section in chapter 1. Check that you have the latest copy of the L30 Instruction Manual and the UR Family Communications Guide, for the applicable firmware version, at http://www.gegridsolutions.com/multilin/manuals/index.htm...
  • Page 60: Panel Cutouts

    Maintenance > Change Front Panel. 3.2.1 Horizontal units The L30 is available as a 19-inch rack horizontal mount unit with a removable faceplate. The faceplate can be specified as either standard or enhanced at the time of ordering. The enhanced faceplate contains additional user-programmable pushbuttons and LED indicators.
  • Page 61: Vertical Units

    3.2.2 Vertical units The L30 is available as a reduced size (¾) vertical mount unit, with a removable faceplate. The faceplate can be specified as either standard or enhanced at the time of ordering. The enhanced faceplate contains additional user-programmable pushbuttons and LED indicators.
  • Page 62 PANEL CUTOUTS CHAPTER 3: INSTALLATION Figure 3-4: Vertical dimensions (enhanced panel) L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 63 CHAPTER 3: INSTALLATION PANEL CUTOUTS Figure 3-5: Vertical and mounting dimensions (standard panel) For side-mounting L30 devices with the enhanced front panel, see the following documents available on the UR DVD and the GE Grid Solutions website: • GEK-113180 — UR-Series UR-V Side-Mounting Front Panel Assembly Instructions •...
  • Page 64 PANEL CUTOUTS CHAPTER 3: INSTALLATION For side-mounting L30 devices with the standard front panel, use the following figures. Figure 3-6: Vertical side-mounting installation (standard panel) L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 65 CHAPTER 3: INSTALLATION PANEL CUTOUTS Figure 3-7: Vertical side-mounting rear dimensions (standard panel) L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 66: Rear Terminal Layout

    (nearest to CPU module), indicated by an arrow marker on the terminal block. The figure shows an example of rear terminal assignments. Figure 3-8: Example of modules in F and H slots L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 67 (rows 1 to 8), use a minimum of 17 inch-pounds. During manufacturing, the power supply and CPU modules are installed in slots B and D of the chassis with 13 inch-pounds of torque on the screws at the top and bottom of the modules. L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 68: Wiring

    WIRING CHAPTER 3: INSTALLATION 3.3 Wiring 3.3.1 Typical wiring Figure 3-9: Typical wiring diagram (T module shown for CPU) 3-10 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 69: Dielectric Strength

    The power supply module can be ordered for two possible voltage ranges, and the L30 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 70: 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. 3-12 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 71 UR models. Substitute the tilde “~” symbol with the slot position of the module in the following figure. Figure 3-12: CT/VT module wiring L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 3-13...
  • Page 72: Process Bus Modules

    3.3.5 Process bus modules The L30 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 73 Where a tilde “~” symbol appears, substitute the slot position of the module. Where a number sign “#” appears, substitute the contact number. L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 3-15...
  • Page 74 ~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 3-16 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 75 ~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 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 3-17...
  • Page 76 WIRING CHAPTER 3: INSTALLATION Figure 3-14: Contact input and output module wiring (Sheet 1 of 2) 3-18 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 77 CHAPTER 3: INSTALLATION WIRING Figure 3-15: 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. L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 3-19...
  • Page 78 L30 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 L30 input and the debounce time setting in the L30 relay is low enough.
  • Page 79 This example is for illustrative purposes only and the calculations present the worst-case scenario. In practice, the value of debounce time can be lower. Contact input ON state impedance used in the calculation of the discharge period is based on the following table. L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 3-21...
  • Page 80 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 81 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. Figure 3-20: Auto-burnish DIP switches L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 3-23...
  • Page 82 In case of external devices that are susceptible to parasitic capacitance of long cable runs affected by switching surges from external circuits, that can cause inadvertent activation of contact inputs with the external contact open, GE recommends using the Digital I/O module with active impedance circuit.
  • Page 83: Transducer Inputs And Outputs

    (5A, 5C, 5D, 5E, and 5F) and channel arrangements that can be ordered for the relay. Where a tilde “~” symbol appears, substitute the slot position of the module. Figure 3-22: Transducer input/output module wiring The following figure show how to connect RTDs. L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 3-25...
  • Page 84: Rs232 Faceplate 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. 3-26 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 85: Cpu Communication Ports

    Figure 3-24: RS232 faceplate port connection 3.3.9 CPU communication ports 3.3.9.1 Overview In addition to the faceplate RS232 port, there is a rear RS485 communication port. The CPU modules do not require a surge ground connection. L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 3-27...
  • Page 86 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 L30 COM terminal (#3); others function correctly only if the common wire is connected to the L30 COM terminal, but insulated from the shield.
  • Page 87: 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 L30 operates an internal oscillator with 1 µs resolution and accuracy.
  • Page 88: Pilot Channel Communications

    3.4 Pilot channel communications A special inter-relay communications module is available for the L30. 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 89: Fiber: Led And Eled Transmitters

    CHAPTER 3: INSTALLATION PILOT CHANNEL COMMUNICATIONS All of the fiber modules use ST type connectors. For two-terminal applications, each L30 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 90: 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. 3-32 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 91 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. L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 3-33...
  • Page 92 (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. 3-34 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 93 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 3-36: G.703 dual loopback mode L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 3-35...
  • Page 94: 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 3-36 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 95 Figure 3-39: Timing configuration for RS422 two-channel, three-terminal application Data module 1 provides timing to the L30 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 96: 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. 3-38 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 97: 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. L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 3-39...
  • Page 98: 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. 3-40 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 99 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 L30 communication for two and three terminal applications.
  • Page 100 Modules shipped since January 2012 have status LEDs that indicate the status of the DIP switches, as shown in the following figure. Figure 3-48: Status LEDs The clock configuration LED status is as follows: • Flashing green — loop timing mode while receiving a valid data packet 3-42 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 101: 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 L30 communication for two and three terminal applications.
  • Page 102 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. 3-44 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 103 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 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 3-45...
  • Page 104: 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. 3-46 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 105: 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 L30 rear communications port. The converter terminals (+, –, GND) are connected to the L30 communication module (+, –, COM) terminals. See the CPU Communication Ports section in chapter 3 for details.
  • Page 106: 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. 3-48 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 107: Add Device To Software

    3.7 Add device to software You connect remotely to the L30 through the rear RS485 or Ethernet port with a computer running the EnerVista UR Setup software. The L30 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 108: 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 109 CHAPTER 3: INSTALLATION ADD DEVICE TO SOFTWARE 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. L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 3-51...
  • Page 110 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 L30 relay and the last number different (in this example, 1.1.1.2).
  • Page 111 Minimum = 0ms, Maximum = 0ms, Average = 0 ms Pinging 1.1.1.1 with 32 bytes of data: verify the physical connection between the L30 and the computer, and double-check the programmed IP address in setting, then repeat step 2. Product Setup  Communications  Network  IP Address...
  • Page 112 Click the Quick Connect button to open the window. Select the Ethernet interface and enter the IP address assigned to the L30, 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 113: 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 114: 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 L30 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 L30 ports.
  • Page 115 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 L30 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 L30 ports.
  • Page 116: Configure Modem Connection

    ADD DEVICE TO SOFTWARE CHAPTER 3: INSTALLATION The device has been configured for Ethernet communications. Proceed to the Connect to the L30 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 117: Connect To The L30

    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 L30 ports, for example under Settings > Product Setup > Communications > Network.
  • Page 118: 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 119: Set Up Cybersentry And Change Default Password

    Connect" and displays them in the Online Window. Expand the sections to view data directly from the L30 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 L30.
  • Page 120: Import Settings

    If required, change the Files of type drop-down list. Select the file to import. To apply the settings to a live device, drag-and-drop the device entry from the Offline Window area to its entry in the Online Window area. 3-62 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 121 CHAPTER 3: INSTALLATION IMPORT SETTINGS Individual settings also can be dragged and dropped between Online and Offline Window areas. The order codes much match. L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 3-63...
  • Page 122 IMPORT SETTINGS CHAPTER 3: INSTALLATION 3-64 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 123: Interfaces

    The EnerVista UR Setup software is provided with every L30. 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 124: Event Viewing

    IP Address IP Subnet Mask IP Routing When a settings file is loaded to a L30 that is in-service, the following sequence occurs: The L30 takes itself out of service. The L30 issues a UNIT NOT PROGRAMMED major self-test error.
  • Page 125: File Support

    Settings list / offline window area Software windows, with common tool bar Settings file data view windows, with common tool bar Workspace area with data view tabs Status bar 10. Quick action hot links L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 126: 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. L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 127: 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. L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 128 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. L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 129 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. L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 130 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. L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 131: 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. L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 132 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 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 133 Right-click the setting file in the offline window area and select the Edit Device Properties item. The window opens. L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 4-11...
  • Page 134: Settings File Traceability

    When a settings file is transferred to a L30 device, the date, time, and serial number of the L30 are sent back to EnerVista UR Setup and added to the settings file on the local computer. This information can be compared with the L30 actual values at any later date to determine if security has been compromised.
  • Page 135 With respect to the figure, the traceability feature is used as follows. The transfer date of a settings file written to a L30 is logged in the relay and can be viewed in the EnerVista software or the front panel display. Likewise, the transfer date of a settings file saved to a local computer is logged in the EnerVista software.
  • Page 136 4.1.9.2 Online device traceability information The L30 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 137: Front Panel Interface

    The front panel can be viewed and used in the EnerVista software, for example to view an error message displayed on the front panel. To view the front panel in EnerVista software: Click Actual Values > Front Panel. Figure 4-18: Front panel use in the software (C60 shown) L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 4-15...
  • Page 138: Front Panel Keypad

    Conversely, continually pressing the MESSAGE left arrow from a setting value or actual value display returns to the header display. 4-16 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 139: Changing Settings

    MESSAGE TIME setting.  MINIMUM: 0.5 Press the HELP key to view the minimum and maximum values. Press the key again to view the MAXIMUM: 10.0 next context sensitive help message. L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 4-17...
  • Page 140 Flash messages appear sequentially for several HELP seconds each. For the case of a text setting message, pressing displays how to edit and store new values. HELP 4-18 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 141: Faceplate

    The following figure shows the horizontal arrangement of the faceplate panel. Figure 4-21: Standard horizontal faceplate The following figure shows the vertical arrangement of the faceplate panel for relays ordered with the vertical option. L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 4-19...
  • Page 142: Led Indicators

    SETTINGS  INPUT/OUTPUTS  RESETTING keys are used by the breaker control feature. USER Figure 4-23: Typical LED panel for enhanced faceplate 4-20 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 143 Support for applying a customized label beside every LED is provided. Default labels are shipped in the label package of every L30, 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 144 NEUTRAL/GROUND — Indicates that neutral or ground was involved User-programmable indicators The second and third panels provide 48 amber LED indicators whose operation is controlled by the user. Support for applying a customized label beside every LED is provided. 4-22 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 145: Custom Led Labeling

    LEDs are fully user-programmable. The default labels can be replaced by user-printed labels for both panels as explained in the next section. Figure 4-26: LED panel 2 (default labels) 4.2.8 Custom LED labeling 4.2.8.1 Enhanced faceplate The following procedure requires these pre-requisites: L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 4-23...
  • Page 146 Select the Front Panel Label Designer item from the Online Window or Offline Window area, for example under Settings > Front Panel Label Designer. If the option does not display, it means that the L30 does not have an enhanced front panel or that no customization is possible. The Online Window has the advantage of displaying the live fields as opposed to blank fields.
  • Page 147 CHAPTER 4: INTERFACES FRONT PANEL INTERFACE The label package shipped with every L30 contains the three default labels, the custom label template sheet, and the label removal tool. If the default labels are suitable for your application, insert them in the appropriate slots and program the LEDs to match them.
  • Page 148 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 L30 enhanced 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 4-26 L30 LINE CURRENT DIFFERENTIAL SYSTEM –...
  • Page 149 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 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 4-27...
  • Page 150: Breaker Control

    4.2.9 Breaker control The L30 can interface with associated circuit breakers. In many cases the application monitors the state of the breaker, that can be presented on faceplate LEDs, along with a breaker trouble indication. Breaker operations can be manually initiated from the faceplate keypad or automatically initiated from a FlexLogic operand.
  • Page 151: Change Passwords

    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 L30, the remote password must be used. If the connection is to the RS232 port of the faceplate, the local password must be used.
  • Page 152: Invalid Password Entry

    By default, when an incorrect Command or Setting password has been entered via the faceplate interface three times within five minutes, the FlexLogic operand is set to “On” and the L30 does not allow settings or LOCAL ACCESS DENIED command level access via the faceplate interface for five minutes.
  • Page 153: Logic Diagrams

    Not. Negates/reverses the output, for example 0 becomes 1.  Connection  S, R Set, Reset Timer pickup. Triggered by the settings latch in the diagram. Timer reset. Triggered by the reset latch in the diagram. L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 4-31...
  • Page 154: Flexlogic Design And Monitoring 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. 4-32 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 155 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 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 4-33...
  • Page 156: 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 4-34 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 157 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 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 4-35...
  • Page 158 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. 4-36 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 159 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. L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 4-37...
  • Page 160 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. 4-38 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 161 'Do not update IID file when updating SCL files') are updated. If the CID file is not already there, it is generated. The location of these files is C:\ProgramData\GE Power Management\urpc, for example, in the Offline and Online folders.
  • Page 162 The same timer is used in more than one place in the editor. This means (TIMER_ID, SheetReference) either the circuit that the Timer belongs to has been branched, or the Timer has been duplicated. 4-40 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 163 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. L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 4-41...
  • Page 164 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 4-45: Code optimization results 4-42 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 165 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. L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 4-43...
  • Page 166: 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. 4-44 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 167: 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. L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 4-45...
  • Page 168: 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. 4-46 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 169: 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. L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 4-47...
  • Page 170 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 171 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. L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 4-49...
  • Page 172 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. 4-50 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 173: 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. L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 4-51...
  • Page 174 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. 4-52 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 175 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. L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 4-53...
  • Page 176 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. 4-54 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 177 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 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 4-55...
  • Page 178 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 4-56 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 179: Settings

     OSCILLOGRAPHY See page 5-100    DATA LOGGER See page 5-102    USER-PROGRAMMABLE See page 5-104   LEDS  USER-PROGRAMMABLE See page 5-107   SELF TESTS L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 180  SETTING GROUP 2     SETTING GROUP 3    SETTING GROUP 4    SETTING GROUP 5    SETTING GROUP 6    L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 181 See page 5-296 TEST MODE FORCING: Range: FlexLogic operand   See page 5-297  PMU See page 5-297   TEST VALUES  FORCE CONTACT See page 5-298   INPUTS L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 182: Overview

    VTs, the secondary base quantity and secondary voltage setting is: Eq. 5-1 For wye-connected VTs, the primary and secondary base quantities are as before, but the secondary voltage setting (here a phase-to-ground value) is: Eq. 5-2 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 183: Introduction To Ac Sources

    VT and the line VT. These requirements can be satisfied with a single L30, equipped with sufficient CT and VT input channels, by selecting proper parameter to measure. A mechanism is provided to specify the AC parameter (or group of parameters) used as the input to protection/control comparators and some metering elements.
  • Page 184 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 L30, 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 185 Upon startup, the CPU configures the settings required to characterize the current and voltage inputs, and it displays them in the appropriate section in the sequence of the banks (as described earlier) as follows for a maximum configuration: F1, F5, L1, L5, S1, and S5. L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 186: Product Setup

    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 187 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 L30, the remote password must be used. If the connection is to the RS232 port of the faceplate, the local password must be used.
  • Page 188 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. 5-10 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 189 INVALID ATTEMPTS BEFORE LOCKOUT The L30 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 190 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. 5-12 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 191 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. L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 192 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 193 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. L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-15...
  • Page 194 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 L30 access using either a server or the device. Access to functions depends on user role.
  • Page 195 When the "Device" button is selected, the L30 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 L30 device.
  • Page 196 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. 5-18 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 197 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. L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-19...
  • Page 198 Range: Administrator, Engineer, Supervisor,   None Operator, Factory (for factory use only), None  CHANGE LOCAL See page 5-21   PASSWORDS  SESSION See page 5-22   SETTINGS 5-20 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 199 • Observer — This role has read-only access to all L30 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 200 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 201 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 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-23...
  • Page 202 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. 5-24 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 203 Clear Energy command (not applicable to all UR products) Clear Unauthorized Access command Clear Teleprotection Counters command (not applicable to all UR products) Clear All Relay Records command Role Log in Role Log off L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-25...
  • Page 204: Display Properties

    PRODUCT SETUP CHAPTER 5: SETTINGS In addition to supporting syslog, a L30 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 205 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 L30 applies a cut-off value to the magnitudes and angles of the measured currents.
  • Page 206: Clear Relay Records

    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 L30 responds to rising edges of the configured FlexLogic operands, they must be asserted for at least 50 ms to take effect.
  • Page 207: Communications

    Range: 0 to 1000 ms in steps of 10  MIN TIME: 0 ms , and — The L30 is equipped with two independent serial communication RS232 BAUD RATE RS485 COM2 BAUD RATE PARITY ports. The faceplate RS232 port is intended for local use and has two options for baud rate. The rear COM2 port is RS485 and has settings for baud rate and parity.
  • Page 208 5.3.4.3 Ethernet network topology The L30 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 209 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. Figure 5-6: Multiple LANs, with redundancy L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-31...
  • Page 210 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 211 2 is performed. The delay in switching back ensures that rebooted switching devices connected to the L30, 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 212 UR 7 redundancy Failover is selected for redundancy. 5.3.4.6 Parallel Redundancy Protocol (PRP) The L30 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 213 The default route is used as the last choice when no other route towards a given destination is found.  DEFAULT IPv4 ROUTE GATEWAY ADDRESS: Range: standard IPV4 unicast address format   127.0.0.1  IPv4 NETWORK RT1 DESTINATION: Range: standard IPV4 address format   ROUTE 1 127.0.0.1 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-35...
  • Page 214 (RtGwy & Prt1Mask) == (Prt1IP & Prt1Mask) || (RtGwy & Prt2Mask) == (Prt2IP & Prt2Mask) || (RtGwy & Prt3Mask) == (Prt3IP & Prt3Mask) where & is the bitwise-AND operator == is the equality operator || is the logical OR operator 5-36 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 215 PRT2 SUBNET IP MASK = 255.255.255.0 IPV4 DEFAULT ROUTE: GATEWAY ADDRESS = 10.1.1.1 STATIC NETWORK ROUTE 1: RT1 DESTINATION = 10.1.3.0/24; RT1 NET MASK = 255.255.255.0; and RT1 GATEWAY = 10.1.2.1 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-37...
  • Page 216 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 L30 is restarted. When it is set to 0, use the front panel or serial port to communicate with the relay.
  • Page 217 Modbus, IEC 61850 Channel 2: RS485 Channel 1: RS485 Modbus Modbus, IEC 61850 Channel 2: none IEC 104 Modbus Modbus IEC 104, Modbus, IEC 61850 IEC 103 Modbus IEC 103 Modbus, IEC 61850 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-39...
  • Page 218 Range: 1 to 10080 min. in steps of 1  PERIOD: 1440 min DNP MESSAGE FRAGMENT Range: 30 to 2048 in steps of 1  SIZE: 240 DNP OBJECT 1 Range: 1, 2  DEFAULT VARIATION: 2 5-40 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 219  COMMUNICATIONS  PROTOCOL multiple DNP masters (usually an RTU or a SCADA master station). Since the L30 maintains two sets of DNP data change buffers and connection information, two DNP masters can actively communicate with the L30 at one time.
  • Page 220 DNP ADDRESS unique address to each DNP slave. The L30 can specify a maximum of five clients for its DNP connections. These are IP addresses for the controllers to which the L30 can connect. The settings follow. SETTINGS  PRODUCT SETUP  COMMUNICATIONS  DNP PROTOCOL  DNP NETWORK CLIENT ADDRESSES ...
  • Page 221 DNP TCP connection for greater than the time specified by this setting, the connection is aborted by the L30. This frees up the connection to be re-used by a client. Any change takes effect after cycling power to the relay.
  • Page 222 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 L30 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 223 Figure 5-11: IEC 61850 panel Opening the IEC 61850 window while online causes the UR Setup software to retrieve and import an SCL file from the L30. 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 224 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 L30. Upon receipt, the L30 checks the CID file for correctness, going out of service, then back into service when the CID file is accepted.
  • Page 225 Default: TEMPLATE The value entered sets the IED name used by IEC 61850 for the L30. An IED name unique within the network must be entered for proper operation. Valid characters are upper and lowercase letters, digits, and the underscore (_) character.
  • Page 226 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 L30. 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 227 Protection logical device has been set to instance name "Prot", the function-related name "Feeder1Prot" and the configuration revision "2016-03-07 08:46." The text is clipped on the right if the line is longer than the available width. The next paragraphs explain how to do this setup. L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-49...
  • Page 228 Figure 5-15: 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. 5-50 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 229 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 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-51...
  • Page 230 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 5-52 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 231 Routable GOOSE (R-GOOSE) is supported in firmware release 7.4 and later. Routable GOOSE allows UR and other devices to be located in separate networks. Encryption/decryption of messages is performed by a separate gateway device. Messages are routed using a separate router, using IP addresses. Note the following behavior: L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-53...
  • Page 232 The UR does not implement the Fixed-Length encoded GOOSE messages option specified in IEC 61850-8-1:2011 clause A.3; the UR always uses the ASN.1 Basic encoding rules (as specified in ISO/IEC 8825-1) as specified in IEC 61850 edition 1.0 and as optional in IEC 61850 edition 2.0. 5-54 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 233 TxGOOSE1 messages from other GOOSE messages. <LDName> is a syntactic variable that is set to the value of setting Master functional ldName if one or more characters have been entered to that setting, otherwise the value of setting IED NAME suffixed with "Master". L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-55...
  • Page 234 Network devices can forward a message with a higher priority value before a message with a lower priority value, which speeds delivery of high-priority messages in heavily loaded networks. The standard recommends that higher-priority messages, such as GOOSE, have priority values in the range of 4 to 7. 5-56 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 235 Range: 1 to 60 s in steps of 1 s Default: 60 s This setting specifies the time interval between heartbeat messages, meaning messages that are sent periodically while no events are detected. L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-57...
  • Page 236 61850-90-5 R GOOSE service can be subscribed to. The UR accepts both the variable length encoded GOOSE messages specified IEC 61850 8 1:2004 and the Fixed-Length encoded GOOSE messages as specified in IEC 61850 8 1:2011 clause A.3. 5-58 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 237 If the publisher is a UR 7.3x series device, this setting needs match the value of the publisher's TxGOOSE GoID setting. L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-59...
  • Page 238 <GoCBName> is the name of the publishing control block. The L30 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 239 If the publisher is a UR 7.3x or 7.40 series device, set these settings to match the basic type of the members of the publisher's data set selected by the publisher's TxGOOSE datSet setting. L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-61...
  • Page 240 SCD (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. 5-62 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 241 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: L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-63...
  • Page 242 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. 5-64 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 243 (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 5-23: RxGOOSE Analog Inputs panel There are 32 RxGOOSE analog inputs. L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-65...
  • Page 244 Range: 0.000 to 1000000000.000 in steps of 0.001 Default: 1.000 This setting specifies the per-unit base value for other L30 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 245 RptEna attribute is false. Buffered and unbuffered reports Navigate to Settings > Product Setup > Communications > IEC 61850 > Reports > Buffered Reports or Unbuffered Reports. L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-67...
  • Page 246 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. 5-68 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 247 Control blocks and data sets can be pre-configured by sending the L30 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 248 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. 5-70 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 249 DataSets Navigate to Settings > Product Setup > Communications > IEC 61850 > DataSets. L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-71...
  • Page 250 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. 5-72 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 251 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. L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-73...
  • Page 252 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. 5-74 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 253 However, a tabulation of the analog values and their associated deadband setting can be found in the UR Family Communications Guide. Figure 5-30: Deadband settings with .db suffix L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-75...
  • Page 254 Navigate to Settings > Communications > IEC 61850 > System Setup > Breakers > Breaker 1 to access the settings that configure the IEC 61850 protocol interface with the first breaker control and status monitoring element. The settings and functionality for the others are similar. 5-76 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 255 SelectWithValue or Operate service with ctlVal true and with Check.Interlock-check true is requested of either BkrCSWI1.Pos or Bkr0XCBR1.Pos and the selected operand is not activated, a Negative Response (-Rsp) is issued with the REASON CODE of Blocked-by-interlocking. L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-77...
  • Page 256 This setting specifies the maximum time between an operate command to breaker 1 via BkrCSWI1.Pos until BkrCSWI1.Pos.stVal enters the commanded state. The command terminates if the commanded state is not reached in the set time. 5-78 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 257 If a SelectWithValue or Operate service with ctlVal true and with Check.Interlock-check true is requested of DiscCSWI1.Pos or Disc0XSWI1.Pos and the selected operand is not activated, a Negative Response (-Rsp) is issued with the REASON CODE of Blocked-by-interlocking. L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-79...
  • Page 258 > 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 L30 reports to the client the disconnect switch 1 position the end of the command sequence.
  • Page 259 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. L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-81...
  • Page 260 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 L30 reports to the client the breaker 1 position at the end of the command sequence.
  • Page 261 Virtual Inputs are controllable FlexLogic operands that can be controlled via IEC 61850 commands to GGIO2, by DNP, by Modbus, and by the UR front panel. The settings related to these IEC 61850 commands are described here. L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-83...
  • Page 262 Navigate to Settings > Product Setup > Communications > IEC 61850 > GGIO > GGIO4 > GGIO4.AnIn1 to access the settings for the first GGIO4 value. The settings and functionality for the others are similar. 5-84 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 263 <LDName>/GGIO4.AnIn01.instMag.f. This setting is stored as an IEEE 754 / IEC 60559 floating point number. Because of the large range of this setting, not all possible values can be stored. Some values are rounded to the closest possible floating point number. L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-85...
  • Page 264 CHAPTER 5: SETTINGS File transfer by IEC 61850 The L30 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 265 NUMBER: 0 The Trivial File Transfer Protocol (TFTP) can be used to transfer files from the L30 over a network. The L30 operates as a TFTP server. TFTP client software is available from various sources, including Microsoft Windows NT. The dir.txt file obtained from the L30 contains a list and description of all available files, for example event records and oscillography.
  • Page 266 COMMUNICATIONS  PROTOCOL connected to a maximum of two masters (usually either an RTU or a SCADA master station). Since the L30 maintains two sets of IEC 60870-5-104 data change buffers, ideally no more than two masters actively communicate with the L30 at one time.
  • Page 267 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 L30 sets the invalid bit in the time stamp of a time-tagged message.
  • Page 268 Spontaneous transmission occurs as a response to cyclic Class 2 requests. If the L30 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 269 FlexAnalog operands. The measurands sent are voltage, current, power, power factor, and frequency. If any other FlexAnalog is chosen, the L30 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 270 Vt = 0.006 * 1200000 - 4096 = 7200 - 4096 = 3104 SETTINGS  PRODUCT SETUP  COMMUNICATIONS  IEC 60870-5-103  IEC103 COMMANDS  IEC103 COMMANDS  COMMAND 0 See below     COMMAND 1    5-92 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 271: Modbus User Map

    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 L30. 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 272: Real-time Clock

    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 273 See the Order Codes section in chapter 2 for details. The L30 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 274 When a clock on start-up discovers that it is “better” than the present grandmaster, it assumes the grandmaster role and the previous grandmaster reverts to slave. The L30 qualification mechanism accepts a potential master clock as a new grandmaster, when in a four-second interval it has received three announce messages from it, all better than the present grandmaster clock and better than any other announce in this interval.
  • Page 275 L30 clock is closely synchronized with the SNTP/ NTP server. It takes up to two minutes for the L30 to signal an SNTP self-test error if the server is offline.
  • Page 276: Fault Reports

     2:00 The L30 maintains two times: local time and Universal Coordinated Time (UTC). Local time can be provided by IRIG-B signals. UTC time is provided by SNTP servers. The real-time clock (RTC) and time stamps reported in historical records and communication protocols can be incorrect if the Local Time settings are not configured properly.
  • Page 277 MAG: 0.00 Ω The L30 relay supports one fault report and an associated fault locator per CT bank to a maximum of two. The signal source and trigger condition, as well as the characteristics of the line or feeder, are entered in this menu.
  • Page 278: Oscillography

    Range: FlexLogic operand  AC INPUT WAVEFORMS: Range: Off; 8, 16, 32, 64 samples/cycle  16 samples/cycle  DIGITAL CHANNELS See below    ANALOG CHANNELS See below   5-100 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 279 Parameters set to “Off” are ignored. To populate quickly the rows in the Offline Window, use Ctrl C/V to copy/paste, or click then double-click a row to display a quick selection window. L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-101...
  • Page 280: Data Logger

    DATA LOGGER CHNL 1: Range: Off, any FlexAnalog/actual value parameter  See Appendix A for list  DATA LOGGER CHNL 16: Range: Off, any FlexAnalog/actual value parameter  See Appendix A for list 5-102 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 281 — This display presents the total amount of time that the Data Logger can record the channels not DATA LOGGER CONFIG selected to “Off” without overwriting old data. L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-103...
  • Page 282: User-programmable Leds

    The test responds to the position and rising edges of the control input defined by the LED TEST CONTROL setting. The control pulses must last at least 250 ms to take effect. The following diagram explains how the test is executed. 5-104 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 283 2. When stage 2 is completed, stage 3 starts automatically. The test can be cancelled at any time by pressing the pushbutton. L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-105...
  • Page 284 AR ENABLED LED 10 operand BREAKER 1 CLOSED LED 22 operand AR DISABLED LED 11 operand BREAKER 1 TROUBLE LED 23 operand AR RIP LED 12 operand LED 24 operand AR LO 5-106 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 285: User-programmable Self-tests

    These are user-programmable and can be used for various applications such as performing an LED test, switching setting groups, and invoking and scrolling though user-programmable displays. The location of the control pushbuttons are shown in the following figures. L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-107...
  • Page 286 PRODUCT SETUP CHAPTER 5: SETTINGS Figure 5-43: Control pushbuttons (enhanced faceplate) An additional four control pushbuttons are included on the standard faceplate when the L30 is ordered with the 12 user- programmable pushbutton option. Figure 5-44: Control pushbuttons (standard faceplate) Control pushbuttons are not typically used for critical operations and are not protected by the control password.
  • Page 287: User-programmable Pushbuttons

    Range: 0 to 60.00 s in steps of 0.05  TIME: 0.00 s PUSHBTN 1 LED CTL: Range: FlexLogic operand  PUSHBTN 1 MESSAGE: Range: Disabled, Normal, High Priority  Disabled PUSHBUTTON 1 Range: Disabled, Enabled  EVENTS: Disabled L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-109...
  • Page 288 PRODUCT SETUP CHAPTER 5: SETTINGS The L30 is provided with this optional feature, specified as an option at the time of ordering. Using the order code for your device, see the order codes in chapter 2 for details. User-programmable pushbuttons provide an easy and error-free method of entering digital state (on, off) information. The number depends on the front panel ordered.
  • Page 289 This setting is applicable only if the user-programmable pushbutton is in "Latched" mode. — This setting enables the user-programmable pushbutton autoreset feature. This setting is applicable PUSHBTN 1 AUTORST only if the pushbutton is in “Latched” mode. L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-111...
  • Page 290 10 seconds. — If this setting is enabled, each user-programmable pushbutton state change is logged as an PUSHBUTTON 1 EVENTS event into the event recorder. The figures show the user-programmable pushbutton logic. 5-112 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 291 CHAPTER 5: SETTINGS PRODUCT SETUP Figure 5-48: User-programmable pushbutton logic (Sheet 1 of 2) L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-113...
  • Page 292: Flex State Parameters

    The state bits can be read out in the “Flex States” register array beginning at Modbus address 0900h. Sixteen states are packed into each register, with the lowest-numbered state in the lowest-order bit. Sixteen registers accommodate the 256 state bits. 5-114 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 293: User-definable Displays

    When this type of entry occurs, the sub-menus are automatically configured with the proper content—this content can be edited subsequently. L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-115...
  • Page 294: Installation

    The units are only displayed on both lines if the units specified both the top and bottom line items are different. 5.3.16 Installation SETTINGS  PRODUCT SETUP  INSTALLATION  INSTALLATION RELAY SETTINGS: Range: Not Programmed, Programmed   Not Programmed 5-116 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 295: Remote Resources

    5.4 Remote resources 5.4.1 Remote resources configuration When the L30 is ordered with a process card module as a part of HardFiber system, an additional Remote Resources menu tree is available in the EnerVista software to allow configuration of the HardFiber system.
  • Page 296: Ac Inputs

    1000:1 CT before summation. If a protection element is set up to act on SRC 1 currents, then a pickup level of 1 pu operates on 1000 A primary. The same rule applies for current sums from CTs with different secondary taps (5 A and 1 A). 5-118 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 297: Power System

    L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-119...
  • Page 298: Signal Sources

    FREQUENCY TRACKING frequency applications. The frequency tracking feature functions only when the L30 is in the “Programmed” mode. If the L30 is “Not Programmed,” then metering values are available but can exhibit significant errors. Select the nominal system frequency as 50 Hz or 60 Hz only. The...
  • Page 299 CT wiring problem. A disturbance detector is provided for each source. The 50DD function responds to the changes in magnitude of the sequence currents. The disturbance detector logic is as follows. L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-121...
  • Page 300 8 CTs 4 CTs, 4 VTs 4 CTs, 4 VTs C60, D60, G30, G60, L30, L90, M60, T60 not applicable This configuration can be used on a two-winding transformer, with one winding connected into a breaker-and-a-half system. The following figure shows the arrangement of sources used to provide the functions required in this application, and the CT/VT inputs that are used to provide the data.
  • Page 301: Power System

     NUMBER OF CHANNELS: Range: 1, 2  CHARGING CURRENT Range: Disabled, Enabled  COMPENSATN: Disabled POS SEQ CAPACITIVE Range: 0.100 to 65.535 kΩin steps of 0.001  REACTANCE: 0.100 kΩ L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-123...
  • Page 302   TRANSFORMER Any changes to the L30 power system settings change the protection system configuration. As such, the 87L protection at all L30 protection system terminals must be temporarily disabled to allow the relays to acknowledge the new settings.
  • Page 303 2 (or 3 for a three-terminal line) before use in the previous equations. If the reactors installed at both ends of the line are different, the following equations apply: For two terminal line: Eq. 5-9 For three terminal line: Eq. 5-10 where L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-125...
  • Page 304 LOCAL (TERMINAL 1 and TERMINAL 2) ID NUMBER desirable to ensure the data used by the relays protecting a given line comes from the correct relays. The L30 performs this check by reading the ID number contained in the messages sent by transmitting relays and comparing this ID to the programmed correct ID numbers by the receiving relays.
  • Page 305 Fail-safe output of the GPS receiver — Some receivers can be equipped with the fail-safe output relay. The L30 system requires a maximum error of 250 µs. The fail-safe output of the GPS receiver can be connected to the local L30 via an input contact.
  • Page 306 µs, or accuracy less than 250 µs, or unknown accuracy/error (that is, not locked to an international time standard). Apply two security counts (2 seconds) to both set and reset of this operand when change is based on accuracy. There is no corresponding quality test for IRIG-B sources here. 5-128 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 307 5.5.4.2 In-zone transformer SETTINGS  SYSTEM SETUP  87L POWER SYSTEM  IN-ZONE TRANSFORMER  IN-ZONE IN-ZONE TRANSFORMER Range: None, 0 to 330° lag in steps of 30°   TRANSFORMER CONNECTION: None L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-129...
  • Page 308: Breakers

     LOCAL-TAP The L30 is provided with this optional feature, specified as an option at the time of ordering. Using the order code for your device, see the order codes in chapter 2 for details. These settings ensure that the 87L element correctly applies magnitude and phase compensation for the in-zone transformer.
  • Page 309 1. The number of breaker control elements depends on the number of CT/VT modules specified with the L30. The following settings are available for each breaker control element.
  • Page 310 MANUAL CLOSE RECAL1 TIME operator has initiated a manual close command to operate a circuit breaker. — Selects an operand indicating that breaker 1 is out-of-service. BREAKER 1 OUT OF SV 5-132 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 311 CHAPTER 5: SETTINGS SYSTEM SETUP Figure 5-56: Dual breaker control logic (Sheet 1 of 2) IEC 61850 functionality is permitted when the L30 is in “Programmed” mode and not in local control mode. L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-133...
  • Page 312 IEC 61850 trip and close commands shown is one protection pass only. To maintain the close/ open command for a certain time, do so on the contact outputs using the "Seal-in" setting, in the Trip Output element, or in FlexLogic. 5-134 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 313: Disconnect Switches

    “1-Pole” mode where each disconnect switch pole has its own auxiliary switch. — This setting selects an operand that when activated, and unless blocked, initiates the disconnect switch 1 SWITCH 1 OPEN open command. L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-135...
  • Page 314 SWITCH 1 ALARM DELAY position tracking operands do not declare a pole disagreement. This allows for non-simultaneous operation of the poles. IEC 61850 functionality is permitted when the L30 is in “Programmed” mode and not in local control mode. 5-136...
  • Page 315 CHAPTER 5: SETTINGS SYSTEM SETUP Figure 5-58: Disconnect switch logic L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-137...
  • Page 316: Flexcurves

    0.48 0.88 15.5 0.50 0.90 16.0 0.52 0.91 16.5 0.54 0.92 17.0 0.56 0.93 17.5 0.58 0.94 18.0 0.60 0.95 18.5 0.62 0.96 19.0 0.64 0.97 19.5 0.66 0.98 10.0 20.0 5-138 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 317 30 ms. At approximately four times pickup, the curve operating time is equal to the MRT and from then onwards the operating time remains at 200 ms. L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-139...
  • Page 318 Configuring a composite curve with an increase in operating time at increased pickup multiples is not allowed. If this is attempted, the EnerVista software generates an error message and discards the proposed changes. 5.5.7.5 Standard recloser curves The following graphs display standard recloser curves available for the L30. 5-140 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 319 CHAPTER 5: SETTINGS SYSTEM SETUP Figure 5-62: Recloser curves GE101 to GE106 Figure 5-63: Recloser curves GE113, GE120, GE138, and GE142 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-141...
  • Page 320 SYSTEM SETUP CHAPTER 5: SETTINGS Figure 5-64: Recloser curves GE134, GE137, GE140, GE151, and GE201 Figure 5-65: Recloser curves GE131, GE141, GE152, and GE200 5-142 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 321 CHAPTER 5: SETTINGS SYSTEM SETUP Figure 5-66: Recloser curves GE133, GE161, GE162, GE163, GE164, and GE165 Figure 5-67: Recloser curves GE116, GE117, GE118, GE132, GE136, and GE139 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-143...
  • Page 322 SYSTEM SETUP CHAPTER 5: SETTINGS Figure 5-68: Recloser curves GE107, GE111, GE112, GE114, GE115, GE121, and GE122 Figure 5-69: Recloser curves GE119, GE135, and GE202 5-144 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 323: Phasor Measurement Unit

      CONFIGURATION The L30 is provided with an optional Phasor Measurement Unit (PMU) feature. This feature is specified as a software option at the time of ordering. The number of PMUs available also depends on this option. Using the order code for your device, see the order codes in chapter 2 for details.
  • Page 324 NONE, which within the standard is classified as PRES OR UNKNOWN under the Calculation Method - ClcMth. Each Logical Device PMU supports one MxxMMXU, MxxMSQI, PxxxMMXU , PxxxMSQI, NxxMMXU, and one NxxMSQI logical node. 5-146 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 325 All bitstrings less than or equal to 32 bits in length map into a 32 bit bitstring in an IEC 61850-90-5 dataset. The Value of the Nominal Frequency of the chassis is instantiated as a DO in LPHD of LD1. The value is named HzNom and is an Integer Status (INS). L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-147...
  • Page 326 5.5.8.5 Example: Creation of different data sets The aggregators allow the aggregation of phasors from multiple PMUs (with the same reporting rate) into a single custom data set to optimize bandwidth when streaming. 5-148 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 327 5.5.8.6 Configuration example: CFG-2 based configuration (using IEC 61850-90-5) The L30 is expected to send the CFG-2 file (IEEE C37.118 config. file) upon request from the upstream synchrophasor devices (for example, P30) without stopping R-SV multicasting, as shown in the following figure. The primary domain controller (PDC) does not need to use a stop/start data stream command if the UR protocol is set to IEC 61850-90-5 prior to requesting the configuration via CFG-2 (IEEE C37.118 config.
  • Page 328 PMU 1 PHS-14: Range: available synchrophasor values  PMU 1 PHS- 1: Range: 16-character ASCII string  NM: GE-UR-PMU-PHS 1  PMU 1 PHS-14: Range: 16-character ASCII string  NM: GE-UR-PMU-PHS 14 5-150 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 329 IEEE C37.118 protocol. This value is a 16-character ASCII string as per the IEEE C37.118 standard. — This setting specifies one of the available L30 signal sources for processing in the PMU. Any PMU 1 SIGNAL SOURCE combination of voltages and currents can be configured as a source.
  • Page 330 10 Hz, 12 Hz, 15 Hz, 20 Hz, 30 Hz, 60 Hz, or 120 Hz (or 10 Hz, 25 Hz, 50 Hz, or 100 Hz when the system frequency is 50 Hz) when entered via the keypad or software; and the L30 stops the transmission of reports.
  • Page 331 ANGLE: 0.00° PMU 1 VB CALIBRATION Range: 95.0 to 105.0 in steps of 0.1%  MAG: 100.0% PMU 1 VC CALIBRATION Range: –5.00 to 5.00° in steps of 0.05  ANGLE: 0.00° L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-153...
  • Page 332 When receiving synchrophasor data at multiple locations, with possibly different reference nodes, it can be more beneficial to allow the central locations to perform the compensation of sequence voltages. • This setting applies to PMU data only. The L30 calculates symmetrical voltages independently for protection and control purposes without applying this correction. •...
  • Page 333 TRIGGER DPO TIME PMU x TRIGGERED operand with stat bits 3 and 11 for a fixed interval defined by this setting. If it is required that operand with PMU x TRIGGERED L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-155...
  • Page 334 L30 standards. This element requires that the frequency be above the minimum measurable value. If the frequency is below this value, such as when the circuit is de-energized, the trigger drops out.
  • Page 335 — Use to extend the trigger after the situation returns to normal. This setting is of importance PMU 1 VOLT TRIGGER DPO TIME when using the recorder in the forced mode (recording as long as the triggering condition is asserted). L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-157...
  • Page 336 — Use to extend the trigger after the situation returns to normal. This setting is of PMU 1 CURR TRIGGER DPO TIME importance when using the recorder in the forced mode (recording as long as the triggering condition is asserted). Figure 5-79: Current trigger logic 5-158 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 337 — Use to extend the trigger after the situation returns to normal. This setting is of PMU 1 POWER TRIGGER DPO TIME particular importance when using the recorder in the forced mode (recording as long as the triggering condition is asserted). L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-159...
  • Page 338 — Use to extend the trigger after the situation returns to normal. This setting is of importance PMU 1 df/dt TRIGGER DPO TIME when using the recorder in the forced mode (recording as long as the triggering condition is asserted). 5-160 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 339 Range: NONE, 37.118, 90-5   PROTOCOL: NONE PMU AGGREGATOR 1 Range: 1 to 65534 in steps of 1  IDCODE: 1 PMU AGGREGATOR 1 Range: No, Yes  INCLUDE PMU1: No L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-161...
  • Page 340 Phasor data concentrator asserts control bit 3 as received via the network  as above AGTR1 PDC CNTRL 16 Phasor data concentrator asserts control bit 16, as received via the network 5-162 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 341 R-SV CB1 SVENA: Range: FlexLogic operand   CONFIGURATION R-SV CB1 CLIENT CTRL: Range: FlexLogic operand  R-SV CB1 SVENA DFLT: Range: FlexLogic operand  R-SV CB1 CONFREV: Range: 1 to 4294967295  L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-163...
  • Page 342 — A range of values limited from 0 to 4095. R-SV CB1 VLAN ID — This setting allows the selection of a specific application ID for each sending device. R-SV CB1 APPID 5-164 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 343: Flexlogic

    FlexLogic. In general, the system receives analog and digital inputs that it uses to produce analog and digital outputs. The figure shows major subsystems of a generic UR-series relay involved in this process. L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-165...
  • Page 344 Figure 5-83: UR architecture overview The states of all digital signals used in the L30 are represented by flags (or FlexLogic operands, which are described later in this section). A digital “1” is represented by a set flag. Any external contact change-of-state can be used to block an element from operating, as an input to a control feature in a FlexLogic equation, or to operate a contact output.
  • Page 345 The following table lists the operands available for the relay. The operands can be viewed online by entering the IP address of the relay in a web browser and accessing the Device Information Menu. L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-167...
  • Page 346 Exceeded maximum CRC error threshold on channel 2 87L DIFF CH1 ID FAIL The ID check for a peer L30 on channel 1 has failed 87L DIFF CH2 ID FAIL The ID check for a peer L30 on channel 2 has failed...
  • Page 347 Digital counter 1 output is ‘equal to’ comparison value Counter 1 LO Digital counter 1 output is ‘less than’ comparison value Counter 2 to 8 Same set of operands as shown for Counter 1 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-169...
  • Page 348 NEUTRAL TOC1 OP Neutral time overcurrent 1 has operated overcurrent NEUTRAL TOC1 DPO Neutral time overcurrent 1 has dropped out NEUTRAL TOC2 Same set of operands as shown for NEUTRAL TOC1 5-170 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 349 Phase A of phase undervoltage 1 has dropped out PHASE UV1 DPO B Phase B of phase undervoltage 1 has dropped out PHASE UV1 DPO C Phase C of phase undervoltage 1 has dropped out L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-171...
  • Page 350 Delta connected VT. SRC2 VT FUSE FAIL Same set of operands as shown for SRC1 VT FF ELEMENT: STUB BUS OP Stub bus is operated Stub bus 5-172 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 351 (does not appear unless ordered) Cont Ip 2 Off (does not appear unless ordered) ↓ ↓ Cont Ip 96 On (does not appear unless ordered) Cont Ip 96 Off (does not appear unless ordered) L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-173...
  • Page 352 LED test LED INDICATORS: LED USER 1 Asserted when user-programmable LED 1 is on User-programmable LEDs LED USER 2 to 48 The operand above is available for user-programmable LEDs 2 through 48 5-174 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 353 PUSHBUTTONS ANY PB ON Any of 12 pushbuttons is in the “On” position PUSHBUTTON 2 to 6, 12, or 16 Same set of operands as PUSHBUTTON 1 depending on front panel L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-175...
  • Page 354 Assigns previous FlexLogic operand to virtual The virtual output is set by the preceding virtual ↓ output 1 parameter output = Virt Op 96 ↓ Assigns previous FlexLogic operand to virtual output 96 5-176 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 355: Flexlogic Rules

    If this is not possible, the logic must be altered until this condition is satisfied. Once done, count the inputs to each gate to verify that the number of inputs does not exceed the FlexLogic limits, which is unlikely but possible. If L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-177...
  • Page 356 Figure 5-86: Logic for virtual output 3 Prepare a logic diagram for virtual output 4, replacing the logic ahead of virtual output 3 with a symbol identified as virtual output 3, shown as follows. 5-178 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 357 Assume for this example that the state is to be ON for a closed contact. The operand is therefore “Cont Ip H1c On”. L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-179...
  • Page 358 [88] Virt Ip 1 On [89] DIG ELEM 1 PKP [90] XOR(2) [91] Virt Op 3 On [92] OR(4) [93] LATCH (S,R) [94] Virt Op 3 On [95] TIMER 1 [96] Cont Ip H1c On 5-180 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 359 Virt Op 2 On Virt Ip 1 On DIG ELEM 1 PKP XOR(2) Virt Op 3 On OR(4) LATCH (S,R) Virt Op 3 On TIMER 1 Cont Ip H1c On OR(3) L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-181...
  • Page 360: Flexlogic Equation Editor

    Range: up to six alphanumeric characters  FxE 1 FLEXELEMENT 1 +IN: Range: Off, any analog actual value parameter  FLEXELEMENT 1 -IN: Range: Off, any analog actual value parameter  5-182 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 361 The element can be programmed to respond either to a signal level or to a rate-of-change (delta) over a pre-defined period of time. The output operand is asserted when the operating signal is higher than a threshold or lower than a threshold, as per your choice. L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-183...
  • Page 362 — Enables the relay to respond to either high or low values of the operating signal. The following FLEXELEMENT 1 DIRECTION figure explains the application of the , and FLEXELEMENT 1 DIRECTION FLEXELEMENT 1 PICKUP FLEXELEMENT 1 HYSTERESIS settings. 5-184 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 363 Figure 5-92: FlexElement direction, pickup, and hysteresis In conjunction with the setting, the element can be programmed to provide two extra FLEXELEMENT 1 INPUT MODE characteristics, as shown in the following figure. L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-185...
  • Page 364 (Terminal 2 IA Mag, IB and IC) 87L SIGNALS BASE = Squared CT secondary of the 87L source (Op Square Curr IA, IB, and IC) (Rest Square Curr IA, IB, and IC) 5-186 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 365: Non-volatile Latches

    The non-volatile latches provide a permanent logical flag that is stored safely and do not reset upon restart after the relay is powered down. Typical applications include sustaining operator commands or permanently blocking relay functions, such as Autorecloser, until a deliberate interface action resets the latch. L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-187...
  • Page 366: Grouped Elements

    5.7.2 Setting group 1 SETTINGS  GROUPED ELEMENTS  SETTING GROUP 1(6)  SETTING GROUP 1  LINE DIFFERENTIAL See below    ELEMENTS  PHASE CURRENT See page 5-194   5-188 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 367  RESTRAINT 2: 50% CURRENT DIFF Range: 0.0 to 20.0 pu in steps of 0.1  BREAK PT: 1.0 pu INRUSH INHIBIT MODE: Range: Disabled, Per phase, 2-out-of-3, Average  Disabled L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-189...
  • Page 368 If set to “Disabled”, no inrush inhibit action is taken. If set to “Per phase”, the L30 performs inrush inhibit individually in each phase. 5-190...
  • Page 369 CHAPTER 5: SETTINGS GROUPED ELEMENTS If set to “2-out-of-3,” the L30 checks second harmonic level in all three phases individually. If any two phases establish an inhibiting condition, then the remaining phase is restrained automatically. If set to “Average”, the L30 first calculates the average second harmonic ratio, then applies the inrush threshold to the calculated average.
  • Page 370 GROUPED ELEMENTS CHAPTER 5: SETTINGS Figure 5-95: Current differential logic 5-192 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 371 It should be blocked unless disconnect is open. To prevent 87L tripping from remote L30 relays still protecting the line, assign the auxiliary contact of line disconnect switch (logic “1” when line switch is open) to block the local 87L function by using the setting.
  • Page 372  DIRECTIONAL 2 5.7.4.2 Inverse TOC curve characteristics The inverse time overcurrent curves used by the time overcurrent elements are the IEEE, IEC, GE Type IAC, and I t standard curve shapes. This allows for simplified coordination with downstream devices.
  • Page 373 97.074 42.166 17.654 10.790 7.849 6.308 5.397 4.814 4.417 4.134 129.432 56.221 23.538 14.387 10.465 8.410 7.196 6.418 5.889 5.513 10.0 161.790 70.277 29.423 17.983 13.081 10.513 8.995 8.023 7.361 6.891 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-195...
  • Page 374 4.280 3.837 3.528 3.297 3.116 2.971 IEC Curve B 0.05 1.350 0.675 0.338 0.225 0.169 0.135 0.113 0.096 0.084 0.075 0.10 2.700 1.350 0.675 0.450 0.338 0.270 0.225 0.193 0.169 0.150 5-196 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 375 A to E = constants defined in the table = characteristic constant defined in the table = reset time in seconds (assuming energy capacity is 100% and RESET is “Timed”) RESET Table 5-32: GE type IAC inverse time curve constants IAC curve shape IAC Extreme Inverse 0.0040 0.6379...
  • Page 376 0.490 0.455 0.434 0.419 0.409 0.401 0.394 10.0 1.431 0.948 0.699 0.613 0.569 0.542 0.524 0.511 0.501 0.493 t curves The I t curves are derived as follows: Eq. 5-17 where 5-198 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 377 T = Operate Time (in seconds) TDM = Multiplier setting I = Input Current = Pickup Current setting pickup = Reset Time in seconds (assuming energy capacity is 100% and RESET: Timed) RESET L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-199...
  • Page 378 GROUPED ELEMENTS CHAPTER 5: SETTINGS Recloser curves The L30 uses the FlexCurve feature to facilitate programming of 41 recloser curves. See the FlexCurves settings section earlier in this chapter for details. 5.7.4.3 Phase time overcurrent (ANSI 51P, IEC PTOC) SETTINGS  GROUPED ELEMENTS  SETTING GROUP 1(6)  PHASE CURRENT  PHASE TOC1(2) ...
  • Page 379 — Selects the signal source for the phase time overcurrent protection element. SIGNAL SOURCE — Selects how phase current input quantities are interpreted by the L30. Inputs can be selected as fundamental INPUT phasor magnitudes or total waveform RMS magnitudes as required by the application.
  • Page 380 PHASE IOC1 BLOCK A: Range: FlexLogic operand   PHASE IOC1 BLOCK C: Range: FlexLogic operand  PHASE IOC1 Range: Self-reset, Latched, Disabled  TARGET: Self-reset PHASE IOC1 Range: Disabled, Enabled  EVENTS: Disabled 5-202 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 381 Range: 0.004 to 3.000 pu in steps of 0.001  THRESHOLD: 0.700 pu PHASE DIR 1 BLOCK Range: No, Yes  WHEN V MEM EXP: No PHASE DIR 1 Range: Self-reset, Latched, Disabled  TARGET: Self-reset L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-203...
  • Page 382 (phase current) and the polarizing signal (the line voltage, shifted in the leading direction by the characteristic angle, ECA). The table shows the operating and polarizing signals used for phase directional control. 5-204 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 383 When set to "No," the directional element allows tripping of phase overcurrent elements under directional control. — This setting enables and disables the logging of phase directional overcurrent events in the PHASE DIR 1 EVENTS sequence of events recorder. L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-205...
  • Page 384: Neutral Current

     NEUTRAL TOC 1 See below     NEUTRAL TOC 2    NEUTRAL IOC 1 See page 5-208     NEUTRAL IOC 4   5-206 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 385 — This setting selects the signal source for the neutral time overcurrent protection element. NEUTRAL TOC1 SIGNAL SOURCE — This setting selects how neutral current input quantities are interpreted by the L30. Inputs can be NEUTRAL TOC1 INPUT selected as fundamental phasor magnitudes or total waveform RMS magnitudes as required by the application.
  • Page 386 The positive-sequence restraint allows for more sensitive settings by counterbalancing spurious zero-sequence currents resulting from: • System unbalances under heavy load conditions • Transformation errors of current transformers (CTs) during double-line and three-phase faults • Switch-off transients during double-line and three-phase faults 5-208 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 387 VOLT: Calculated V0 NEUTRAL DIR OC1 OP Range: Calculated 3I0, Measured IG  CURR: Calculated 3I0 NEUTRAL DIR OC1 POS- Range: 0.000 to 0.500 in steps of 0.001  SEQ RESTRAINT: 0.063 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-209...
  • Page 388 The following tables define the neutral directional overcurrent element. V_0 is the zero-sequence voltage, I_0 is the zero-sequence current, ECA is the element characteristic angle, and IG is the ground current. 5-210 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 389 REV LA = 80° (reverse limit angle = the ± angular limit with the ECA for operation) Take the bias into account when using the neutral directional overcurrent element to directionalize other protection elements. L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-211...
  • Page 390 A similar situation arises for a wye/delta/wye transformer, where current in one transformer winding neutral can reverse when faults on both sides of the transformer are considered. 5-212 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 391 — This setting defines the pickup level for the overcurrent unit of the element in the reverse NEUTRAL DIR OC1 REV PICKUP direction. When selecting this setting, keep in mind that the design uses a positive-sequence restraint technique for the “Calculated 3I0” mode of operation. L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-213...
  • Page 392: Ground Current

     GROUND IOC1 See page 5-216     GROUND IOC4   The L30 contains protection elements for ground time overcurrent (ANSI device 51G) and ground instantaneous overcurrent (ANSI device 50G). 5-214 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 393 — This setting selects the signal source for the ground time overcurrent protection element. GROUND TOC1 SIGNAL SOURCE — This setting selects how ground current input quantities are interpreted by the L30. Inputs can be GROUND TOC1 INPUT selected as fundamental phasor magnitudes or total waveform RMS magnitudes as required by the application.
  • Page 394 These elements measure the current that is connected to the ground channel of a CT/VT module. The conversion range of a standard channel is from 0.02 to 46 times the CT rating. 5-216 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 395: Negative Sequence Current

    Range: Instantaneous, Timed  RESET: Instantaneous NEG SEQ TOC1 BLOCK: Range: FlexLogic operand  NEG SEQ TOC1 Range: Self-reset, Latched, Disabled  TARGET: Self-reset NEG SEQ TOC1 Range: Disabled, Enabled  EVENTS: Disabled L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-217...
  • Page 396 (12.5%) of the positive-sequence current magnitude is subtracted from the negative-sequence current magnitude when forming the operating quantity. = |I_2| - K x |I_1| where K = 1/8 Eq. 5-25 5-218 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 397: Breaker Failure (ansi 50bf)

    Range: 0.020 to 30.000 pu in steps of 0.001  PICKUP: 1.050 pu BF1 USE TIMER 1: Range: Yes, No  BF1 TIMER 1 PICKUP Range: 0.000 to 65.535 s in steps of 0.001  DELAY: 0.000 s L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-219...
  • Page 398 Because breaker failure can result in tripping a large number of breakers and this affects system safety and stability, a very high level of security is required. 5-220 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 399 Output The outputs from the schemes are: • FlexLogic operands that report on the operation of portions of the scheme • FlexLogic operand used to re-trip the protected breaker L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-221...
  • Page 400 — If set to "Yes," the element is sealed-in if current flowing through the breaker is above the supervision BF1 USE SEAL-IN pickup level. — This setting selects the FlexLogic operand that initiates three-pole tripping of the breaker. BF1 3-POLE INITIATE 5-222 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 401 In microprocessor relays this time is not significant. In L30 relays, which use a Fourier transform, the calculated current magnitude ramps-down to zero one power frequency cycle after the current is interrupted, and this lag needs to be included in the overall margin duration, as it occurs after current interruption.
  • Page 402 Upon operation of the breaker failure element for a single pole trip command, a three-pole trip command needs to be given via output operand BKR FAIL 1 TRIP Figure 5-112: Single-pole breaker failure initiate logic 5-224 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 403 CHAPTER 5: SETTINGS GROUPED ELEMENTS Figure 5-113: Single-pole breaker failure, timers logic L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-225...
  • Page 404 GROUPED ELEMENTS CHAPTER 5: SETTINGS Figure 5-114: Three-pole breaker failure, initiate logic 5-226 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 405 CHAPTER 5: SETTINGS GROUPED ELEMENTS Figure 5-115: Three-pole breaker failure, timers logic L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-227...
  • Page 406: Voltage Elements

    The time delay is adjustable from 0 to 600.00 seconds in steps of 0.01. The undervoltage elements can also be programmed to have an inverse time delay characteristic. 5-228 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 407 Range: 0.00 to 600.00 s in steps of 0.01  DELAY: 1.00 s PHASE UV1 MINIMUM Range: 0.000 to 3.000 pu in steps of 0.001  VOLTAGE: 0.100 pu PHASE UV1 BLOCK: Range: FlexLogic operand  L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-229...
  • Page 408 Range: 0.00 to 600.00 s in steps of 0.01  DELAY: 1.00 s PHASE OV1 BLOCK: Range: FlexLogic Operand  PHASE OV1 Range: Self-reset, Latched, Disabled  TARGET: Self-reset PHASE OV1 Range: Disabled, Enabled  EVENTS: Disabled 5-230 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 409 Range: 0.00 to 600.00 s in steps of 0.01  DELAY: 1.00 s NEUTRAL OV1 BLOCK: Range: FlexLogic operand  NEUTRAL OV1 TARGET: Range: Self-reset, Latched, Disabled  Self-reset NEUTRAL OV1 EVENTS: Range: Disabled, Enabled  Disabled L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-231...
  • Page 410 There are three negative-sequence overvoltage elements available. Use the negative-sequence overvoltage element to detect loss of one or two phases of the source, a reversed phase sequence of voltage, or a non-symmetrical system voltage condition. 5-232 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 411 Range: Disabled, Enabled  Disabled The L30 contains one auxiliary undervoltage element for each VT bank. This element monitors undervoltage conditions of the auxiliary voltage. selects the voltage level at which the time undervoltage element starts timing. The nominal secondary...
  • Page 412 Range: Disabled, Enabled  Disabled The L30 contains one auxiliary overvoltage element for each VT bank. This element is intended for monitoring overvoltage conditions of the auxiliary voltage. The nominal secondary voltage of the auxiliary voltage channel entered under SYSTEM is the per-unit (pu) base used when setting the SETUP ...
  • Page 413: Supervising Elements

    (I_0), the change in negative-sequence current (DI_2), the change in zero-sequence current (DI_0), and the change in positive-sequence current (DI_1). The disturbance detector element uses net local current, computed as L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-235...
  • Page 414 — This setting can be disabled when the disturbance detector element responds to any current disturbance on DD EVENTS the system that results in filling the events buffer and possible loss of valuable data. 5-236 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 415 CHAPTER 5: SETTINGS GROUPED ELEMENTS Figure 5-123: Disturbance detector logic L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-237...
  • Page 416: Control Elements

    If more than one operate-type operand is required, it can be assigned directly from the trip bus menu. 5-238 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 417 TRIP BUS 1 RESET RESET OP operand is pre-wired to the reset gate of the latch, As such, a reset command from the front panel interface or via communications resets the trip bus output. L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-239...
  • Page 418: Setting Groups

    Prevents the active setting group from changing when the selected FlexLogic operand is "On." This SETTING GROUPS BLK — can be useful in applications where it is undesirable to change the settings under certain conditions, such as during a control sequence. 5-240 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 419: Selector Switch

    SELECTOR 1 TIME-OUT: Range: 3.0 to 60.0 s in steps of 0.1  5.0 s SELECTOR 1 STEP-UP: Range: FlexLogic operand  SELECTOR 1 STEP-UP Range: Time-out, Acknowledge  MODE: Time-out L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-241...
  • Page 420 (“Acknowledge” mode). When the new position is applied, the relay displays the SELECTOR SWITCH 1: POSITION Z IN USE message. Typically, a user-programmable pushbutton is configured as the stepping up control input. 5-242 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 421 (that is, the three-bit input is not available (0,0,0) or out of range), then the selector switch output is set to position 0 (no output operand selected) and an alarm is established ( SELECTOR 1 PWR ALARM L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-243...
  • Page 422 The selector position pre-selected via the three-bit control input has not been confirmed before the time The following figures illustrate the operation of the selector switch. In these diagrams, “T” represents a time-out setting. 5-244 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 423 CHAPTER 5: SETTINGS CONTROL ELEMENTS Figure 5-127: Time-out mode L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-245...
  • Page 424 1 through 3. The pre-selected setting group is to be applied automatically after five seconds of inactivity of the control inputs. When the relay powers up, it is to synchronize the setting group to the three-bit control input. 5-246 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 425 SETTINGS  PRODUCT menu: SETUP  USER-PROGRAMMABLE PUSHBUTTONS  USER PUSHBUTTON 1 : “Self-reset” PUSHBUTTON 1 FUNCTION : “0.10 s” PUSHBUTTON 1 DROP-OUT TIME The figure shows the logic for the selector switch. L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-247...
  • Page 426: Underfrequency (ansi 81u)

    DELAY : 2.000 s UNDERFREQ 1 TARGET: Range: Self-reset, Latched, Disabled  Self-reset UNDERFREQ 1 EVENTS: Range: Disabled, Enabled  Disabled There are six identical underfrequency elements, numbered 1 through 6. 5-248 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 427: Frequency Rate Of Change (ansi 81r)

    FREQ RATE 1 PICKUP Range: 0 to 65.535 s in steps of 0.001  DELAY: 0.000 s FREQ RATE 1 RESET Range: 0 to 65.535 s in steps of 0.001  DELAY: 0.000 s L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-249...
  • Page 428 (such as for load shedding), set this setting to the required frequency level. If the signal source assigned to the frequency rate of change element is only set to auxiliary VT, then the minimum voltage supervision is 3 V. 5-250 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 429: Synchrocheck (ansi 25)

    DIFF: 10000 V SYNCHK1 MAX ANGLE Range: 0 to 100° in steps of 1  DIFF: 30° SYNCHK1 MAX FREQ Range: 0.00 to 2.00 Hz in steps of 0.01  DIFF: 1.00 Hz L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-251...
  • Page 430 — This setting selects the source for voltage V1 (see the Notes section that follows). SYNCHK1 V1 SOURCE — Selects the source for voltage V2, which must not be the same as used for the V1 (see Notes). SYNCHK1 V2 SOURCE 5-252 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 431 V2 magnitude can be directly compared with V1 magnitude. For example, when V1 and V2 are taken from 2 different windings of the transformer and at different voltage levels, the magnitude compensation must be performed before starting magnitude comparison in synchrocheck element. L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-253...
  • Page 432 The relay uses the phase channel of a three-phase set of voltages if programmed as part of that source. The relay uses the auxiliary voltage channel only if that channel is programmed 5-254 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 433 CHAPTER 5: SETTINGS CONTROL ELEMENTS as part of the Source and a three-phase set is not. L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-255...
  • Page 434 CONTROL ELEMENTS CHAPTER 5: SETTINGS Figure 5-134: Synchrocheck logic 5-256 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 435: Autoreclose (ansi 79)

     AR1 DELAY 2: Range: 0.00 to 655.35 s in steps of 0.01  0.000 s AR1 RESET LOCKOUT Range: 0.00 to 655.35 s in steps of 0.01  DELAY: 60.000 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-257...
  • Page 436  Disabled The L30 is provided with this optional feature, specified as an option at the time of ordering. Using the order code for your device, see the order codes in chapter 2 for details. The maximum number of autoreclosure elements available is equal to the number of installed CT banks.
  • Page 437 "reclose-in-progress" state. If all conditions allowing a breaker closure are not satisfied when this time expires, the scheme goes to Lockout. This timer must be set to a delay less than the reset timer. L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-259...
  • Page 438 CONTROL ELEMENTS CHAPTER 5: SETTINGS Figure 5-135: Autoreclosure logic (Sheet 1 of 2) 5-260 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 439 CHAPTER 5: SETTINGS CONTROL ELEMENTS Figure 5-136: Autorecloser logic (Sheet 2 of 2) L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-261...
  • Page 440 CONTROL ELEMENTS CHAPTER 5: SETTINGS Figure 5-137: Single shot autoreclosing sequence - permanent fault 5-262 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 441: Digital Elements

    DIGITAL ELEMENT 1 RESET DELAY — This setting enables or disabled the digital element pickup LED. When set to “Disabled,” the DIGITAL ELEMENT 1 PICKUP LED operation of the pickup LED is blocked. L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-263...
  • Page 442 In most breaker control circuits, the trip coil is connected in series with a breaker auxiliary contact that is open when the breaker is open (see figure). To prevent unwanted alarms in this situation, the trip circuit monitoring logic must include the breaker position. Figure 5-139: Trip circuit example 1 5-264 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 443 In this case, it is not required to supervise the monitoring circuit with the breaker position – the setting is BLOCK selected to “Off.” In this case, the settings are as follows (EnerVista example shown). L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-265...
  • Page 444: Digital Counters

    Range: FlexLogic operand  CNT1 SET TO PRESET: Range: FlexLogic operand  COUNTER 1 RESET: Range: FlexLogic operand  COUNT1 FREEZE/RESET: Range: FlexLogic operand  COUNT1 FREEZE/COUNT: Range: FlexLogic operand  5-266 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 445 If control power is interrupted, the accumulated and frozen values are saved into non-volatile memory during the power-down operation. L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-267...
  • Page 446: Monitoring Elements

     VT FUSE FAILURE 1 See page 5-275    VT FUSE FAILURE 2    THERMAL OVERLOAD See page 5-277   PROTECTION  BROKEN CONDUCTOR See page 5-280   5-268 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 447 — Selects the threshold value above which the output operand is set. BKR 1 ARC AMP LIMIT L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-269...
  • Page 448 -cycle) and AMP MAX (kA) values of the last event. — This setting specifies the maximum symmetrical interruption rating of the circuit breaker. BKR 1 INTERUPTION RATING Figure 5-142: Arcing current measurement 5-270 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 449 CHAPTER 5: SETTINGS CONTROL ELEMENTS Figure 5-143: Breaker arcing current logic L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-271...
  • Page 450 CT FAIL 1 3V0 INPUT — Specifies the pickup value for the 3V_0 source. CT FAIL 1 3V0 INPUT PICKUP — Specifies the pickup delay of the CT failure element. CT FAIL 1 PICKUP DELAY 5-272 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 451 RESET DELAY: 0.100 s INCIPIENT FAULT 1 Range: Self-reset, Latched, Disabled  TARGET: Self-reset INCIPIENT FAULT 1 Range: Disabled, Enabled  EVENTS: Disabled There is one incipient cable fault detection element. L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-273...
  • Page 452 — Selects a current source for the incipient cable fault detector element. This source must be INCIPIENT FAULT 1 SOURCE assigned a valid CT bank. — Specifies the pickup level of the overcurrent detector in per-unit values of the CT nominal INCIPIENT FAULT 1 PICKUP current. 5-274 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 453 B failures is when positive sequence current is present and there is an insignificant amount of positive sequence voltage. Also, a rapid decrease in the phase voltages magnitude from a healthy L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-275...
  • Page 454 PHASE VT SECONDARY of DELTA VTs. The setting is found under SETTINGS  SYSTEM SETUP  AC INPUTS  VOLTAGE BANK  PHASE VT SECONDARY Figure 5-147: VT fuse fail logic 5-276 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 455 = protected element base (nominal) current To ensure element accuracy for high overcurrent conditions, the maximum value of I/(k x I ) is limited to 8, even when realistically it is exceeding this value. L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-277...
  • Page 456 The thermal overload protection element estimates accumulated thermal energy E using the following equations calculated each power cycle. When current is greater than the pickup level, I > k × I , element starts increasing the thermal energy: Eq. 5-31 5-278 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 457 30 minutes Busbar 60 minutes 20 minutes Underground cable 20 to 60 minutes 60 minutes The figure shows the logic for the thermal overload protection element. Figure 5-149: Thermal overload protection logic L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-279...
  • Page 458 — This setting specifies the pickup time delay for this function to operate after assertion BROKEN CONDUCTOR 1 PKP DELAY of the broken conductor pickup FlexLogic operand. 5-280 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 459 CHAPTER 5: SETTINGS CONTROL ELEMENTS Figure 5-150: Broken conductor detection logic L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-281...
  • Page 460: Inputs/outputs

    The DC input voltage is compared to a user-settable threshold. A new contact input state must be maintained for a user-settable debounce time in order for the L30 to validate the new contact state. In the following figure, the debounce time is set at 2.5 ms;...
  • Page 461 For example, to use contact input H5a as a status input from the breaker 52b contact to seal-in the trip relay and record it in the Event Records menu, make the following settings changes: L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-283...
  • Page 462: Virtual Inputs

    FlexLogic equation, it likely needs to be lengthened in time. A FlexLogic timer with a delayed reset can perform this function. Figure 5-152: Virtual inputs logic 5-284 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 463: Contact Outputs

    : any suitable FlexLogic operand OUTPUT H1 OPERATE “Cont Op 1 OUTPUT H1 SEAL-IN IOn” : “Enabled” CONTACT OUTPUT H1 EVENTS Figure 5-153: Contact input/output module type 6A contact 1 logic L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-285...
  • Page 464 Figure 5-154: Contact input/output module type 4L contact 1 logic Application example 1 A latching output contact H1a is to be controlled from two user-programmable pushbuttons (buttons number 1 and 2). The following settings are applied. 5-286 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 465 (assuming an H4L module): OUTPUTS  CONTACT OUTPUT H1a CONTACT OUTPUT H1c : “VO1” OUTPUT H1a OPERATE : “VO4” OUTPUT H1a RESET : “VO2” OUTPUT H1c OPERATE : “VO3” OUTPUT H1c RESET L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-287...
  • Page 466: Virtual Outputs

    The command can be sent from the faceplate RESET button, a remote device via a communications channel, or any selected operand. RESET 5-288 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 467: Direct Inputs And Outputs

    5.9.6.3 Direct outputs SETTINGS  INPUTS/OUTPUTS  DIRECT  DIRECT OUTPUTS  DIRECT OUTPUTS DIRECT OUTPUT 1-1: Range: FlexLogic operand    DIRECT OUTPUT 1-8: Range: FlexLogic operand  L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-289...
  • Page 468: Transducer Inputs/outputs

     VALUE: 0.000 The L30 is provided with optional DCmA capability. This feature is specified as an option at the time of ordering. See the Order Codes section in chapter 2 for details. 5-290 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 469: Rtd Inputs

    An alphanumeric ID is assigned to the channel; this ID is included in the channel actual values. It is also used to reference the channel as the input parameter to features designed to measure this type of parameter. Selecting the type of RTD connected to the channel configures the channel. L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-291...
  • Page 470: Dcma Outputs

    Range: Off, any analog actual value parameter   SOURCE: Off DCMA OUTPUT H1 Range: –1 to 1 mA, 0 to 1 mA, 4 to 20 mA  RANGE: –1 to 1 mA 5-292 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 471 MAX VAL MIN VAL MAX VAL – < 0.1 pu. The resulting characteristic is illustrated in the following figure. MIN VAL Figure 5-156: DCmA output characteristic Settings L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-293...
  • Page 472 ±1% of reading error for the active power at power factor of 0.9 For example at the reading of 20 MW, the worst-case error is 0.01 × 20 MW + 0.207 MW = 0.407 MW. 5-294 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 473 6), while at the same time the VT nominal voltage is 1 pu for the settings. Consequently the settings required in this example differ from naturally expected by the factor of The worst-case error for this application could be calculated by superimposing the following two sources of error: L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-295...
  • Page 474: Testing

     FUNCTION: Disabled The L30 provides a test facility to verify the functionality of contact inputs and outputs, some communication functions and the phasor measurement unit (where applicable), using simulated conditions. The test mode can be in any of three states: Disabled, Isolated, or Forcible.
  • Page 475: Test Mode Forcing

      When in Forcible mode, the operand selected by the setting dictates further response of the L30 to TEST MODE FORCING testing conditions, as described in the following two sections. The test mode state is indicated on the relay faceplate by a combination of the Test Mode LED indicator, the In-Service LED indicator, and by the critical fail relay, as shown in the following table.
  • Page 476: Force Contact Inputs

    If set to “Closed,” the input is forced to report as closed (Logic 1) while the operand selected by TEST MODE FORCING setting is On regardless of the voltage across the input terminals. While the selected operand is Off, the input behaves as it does when in service. 5-298 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 477: Force Contact Outputs

     This function checks the communications established by both relays.  LOCAL LOOPBACK LOCAL LOOPBACK Range: Yes, No  FUNCTION: No  LOCAL LOOPBACK Range: 1, 2  CHANNEL NUMBER: 1 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-299...
  • Page 478  REMOTE LOOPBACK REMOTE LOOPBACK Range: Yes, No   FUNCTION: No REMOTE LOOPBACK Range: 1, 2  CHANNEL NUMBER: 1 See the Commissioning chapter for information on using the channel tests. 5-300 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 479: Actual Values

     RxGOOSE STATUS See page 6-5    RxGOOSE See page 6-6   STATISTICS  CHANNEL TESTS See page 6-6    DIGITAL COUNTERS See page 6-7   L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 480  RTD INPUTS  ACTUAL VALUES  FAULT REPORT See page 6-24   RECORDS   EVENT RECORDS See page 6-25     OSCILLOGRAPHY See page 6-26   L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 481: Front Panel

    The front panel can be viewed and used in the EnerVista software, for example to view an error message displayed on the front panel. To view the front panel in EnerVista software: Click Actual Values > Front Panel. Figure 6-1: Front panel use in the software (C60 shown) L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 482: Status

    Range: On, Off  STATUS: Off The L30 is provided with optional IEC 61850 capability. This feature is specified as a software option at the time of ordering. See the Order Codes section of chapter 2 for details. 6.3.4 RxGOOSE DPS inputs ACTUAL VALUES ...
  • Page 483: Contact Outputs

    CHAPTER 6: ACTUAL VALUES STATUS The L30 is provided with optional IEC 61850 capability. This feature is specified as a software option at the time of ordering. See the Order Codes section of chapter 2 for details. 6.3.5 Contact outputs ACTUAL VALUES ...
  • Page 484: Rxgoose Statistics

    STATUS CHAPTER 6: ACTUAL VALUES The L30 is provided with optional IEC 61850 capability. This feature is specified as a software option at the time of ordering. See the Order Codes section of chapter 2 for details. actual value does not consider RxGOOSE that are not configured or are not used by any RxGOOSE All RxGOOSE Online Input.
  • Page 485: Digital Counters

    (the count units label also appears). Also included, is the date and time stamp for the frozen count. The value refers to the microsecond portion of the time stamp. COUNTER 1 MICROS L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 486: Selector Switches

    No Signal Pdelay), Synchronized PORT 3 PTP STATE: Range: Disabled, No Signal, Calibrating, Synch’d (No  No Signal Pdelay), Synchronized PTP - IRIG-B DELTA: Range: -500,000,000 to +500,000,000 ns  500000000 ns L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 487: Direct Inputs

    The number of detected incipient faults for each incipient fault element are displayed here for each phase. These values can be reset to zero with the command. COMMANDS  CLEAR RECORDS  CLEAR INCIPENT FAULT COUNTERS L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 488: Remaining Connection Status

    Range: 0 to 4G, blank if PRP disabled  The L30 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 489: Txgoose Status

     ARP: The L30 is provided with optional IEC 61850 capability. This feature is specified as a software option at the time of ordering. See the Order Codes section of chapter 2 for details. This status is relevant to R-GOOSE reception when configured for SSM or ASM reception modes. It is not relevant for GOOSE or for R-GOOSE in unicast reception mode.
  • Page 490 6.4.1.2 UR convention for measuring phase angles All phasors calculated by URs and used for protection, control and metering functions are rotating phasors that maintain the correct phase angle relationships with each other at all times. 6-12 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 491 For display and oscillography purposes the phase angles of symmetrical components are referenced to a common reference as described in the previous sub-section. WYE-connected instrument transformers • ABC phase rotation: • ACB phase rotation: The above equations apply to currents as well. L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 6-13...
  • Page 492 * The power system voltages are phase-referenced – for simplicity – to V and V , respectively. This, however, is a relative matter. It is important to remember that the L30 displays are always referenced as specified under SETTINGS  SYSTEM SETUP  POWER SYSTEM  FREQUENCY AND PHASE REFERENCE The example above is illustrated in the following figure.
  • Page 493: Differential Current

    Terminal 1 refers to the communication channel 1 interface to a remote L30 at terminal 1. Terminal 2 refers to the communication channel 2 interface to a remote L30 at terminal 2.
  • Page 494: Sources

    SRC 1 PHASOR Ib:  0.000 A 0.0° SRC 1 PHASOR Ic:  0.000 A 0.0° SRC 1 PHASOR In:  0.000 A 0.0° SRC 1 ZERO SEQ I0:  0.000 A 0.0° 6-16 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 495 SRC 1 PHASOR Vab:  0.000 V 0.0° SRC 1 PHASOR Vbc:  0.000 V 0.0° SRC 1 PHASOR Vca:  0.000 V 0.0° SRC 1 ZERO SEQ V0:  0.000 V 0.0° L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 6-17...
  • Page 496 φa: 0.000 VA SRC 1 APPARENT PWR  φb: 0.000 VA SRC 1 APPARENT PWR  φc: 0.000 VA SRC 1 POWER FACTOR  3φ: 1.000 SRC 1 POWER FACTOR  φa: 1.000 6-18 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 497 S = V x Î x Î x Î Eq. 6-1 When VTs are configured in delta, the L30 does not calculate power in each phase and three-phase power is measured as S = V x Î x Î Eq. 6-2...
  • Page 498: Synchrocheck

    ACTUAL VALUES  METERING  SYNCHROCHECK  SYNCHROCHECK 1(4)  SYNCHROCHECK 1 SYNCHROCHECK 1 DELTA   VOLT: 0.000 kV SYNCHROCHECK 1 DELTA  FREQ: 0.00 Hz SYNCHROCHECK 1  DELTA PHASE: 0.0° SYNCHROCHECK 1  SYNSCP D_PH: 0.0° 6-20 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 499: Tracking Frequency

    (CT primary for source currents, and 87L source primary current for line differential currents) (Diff Curr IA Mag, IB, and IC) (Terminal 1 IA Mag, IB, and IC) (Terminal 2 IA Mag, IB and IC) L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 6-21...
  • Page 500: Rxgoose Analogs

     0.000 The L30 is provided with optional GOOSE communications capability. This feature is specified as a software option at the time of ordering. See the Order Codes section of chapter 2 for details. The RxGOOSE Analog values display in this menu. The RxGOOSE Analog values are received via IEC 61850 GOOSE messages sent from other devices.
  • Page 501: Pmu Aggregator

    Actual values for each DCmA input channel that is enabled are displayed with the top line as the programmed channel ID and the bottom line as the value followed by the programmed units. L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 6-23...
  • Page 502: Records

    IA + (Z0/Z1-1)*I0 + Z0M/Z1*IG/3 IB + (Z0/Z1-1)*I0 + Z0M/Z1*IG/3 IC + (Z0/Z1-1)*I0 + Z0M/Z1*IG/3 AB, ABG VA – VB IA - IB BC, BCG VB – VC IB - IC 6-24 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 503: Event Records

    The event records are also viewable in the software and in a web browser. The figure shows the event records in the software. To view them in a web browser, enter the IP address of the device. L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 6-25...
  • Page 504: Oscillography

    It is static until the log gets OLDEST SAMPLE TIME full, at which time it starts counting at the defined sampling rate. 6-26 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 505: Phasor Measurement Unit Records

    BKR 1 ARCING AMP φA:  0.00 kA2-cyc BKR 1 ARCING AMP φB:  0.00 kA2-cyc BKR 1 ARCING AMP φC:  0.00 kA2-cyc BKR 1 AMP MAX φA:  0.00 kA L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 6-27...
  • Page 506: Product Information

    The MAC address displays for port 1. The MAC address for port 2 is one higher. The MAC address for port 3 is one higher than port 2. In redundant mode, the MAC addresses for ports 2 and 3 are the same as port 2. 6-28 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 507: Firmware Revisions

     2016/09/15 16:41:32 Date and time when the FPGA was built. The shown data is illustrative only. A modification file number of 0 indicates that, currently, no modifications have been installed. L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 6-29...
  • Page 508 PRODUCT INFORMATION CHAPTER 6: ACTUAL VALUES 6-30 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 509: Commands And Targets

    The commands menu contains relay directives intended for operations personnel. All commands can be protected from unauthorized access via the command password; see the Security section of chapter 5 for details. The following flash message appears after successfully command entry. COMMAND EXECUTED L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 510: Virtual Inputs

    This menu contains commands for clearing historical data such as the event records. Data is cleared by changing a command setting to “Yes” and pressing the key. After clearing data, the command setting automatically reverts to ENTER “No.” L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 511: Set Date And Time

    — This command causes the relay to scan the backplane for the hardware modules and update the UPDATE ORDER CODE order code to match. If an update occurs, the following message displays. L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 512: Phasor Measurement Unit One-shot

    Although the diagnostic information is cleared before the L30 is shipped from the factory, the user can want to clear the diagnostic information for themselves under certain circumstances. For example, you clear diagnostic information after replacement of hardware. Once the diagnostic information is cleared, all self-checking variables are reset to their initial state and diagnostics restart from scratch.
  • Page 513 CHAPTER 7: COMMANDS AND TARGETS COMMANDS MENU The one-shot function applies to all logical PMUs of a given L30 relay. Figure 7-1: PMU one-shot FlexLogic operands 7.1.5.1 Testing accuracy of the PMU The one-shot feature is used to test accuracy of the synchrophasor measurement. GPS-synchronized tests sets perform a similar function to PMUs;...
  • Page 514: Security

    A target enables the EnerVista UR Setup software to monitor automatically and display the status of any active target messages of all the devices inserted into that site. Each L30 element with a TARGET setting has a target message that when activated by its element is displayed in sequence with any other currently active target messages in the menu.
  • Page 515: Relay Self-tests

    Contact Factory (xxx) • Latched target message: Yes. • Description of problem: One or more installed hardware modules is not compatible with the L30 order code. • How often the test is performed: Module dependent. • What to do: Contact the factory and supply the failure code noted in the display. The “xxx” text identifies the failed module (for example, F8L).
  • Page 516 C37.118 - 2005 standard. The new functionality leveraging the hardware is supported with firmware revision 7.25 and above. When using an older revision of the process card with a new firmware revision L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 517 At least one PTP grandmaster-capable clock is functioning. – If strict PP is enabled, that entire network is PP compliant. – The network is delivering PTP messages to the relay. MAINTENANCE ALERT: SNTP Failure • Latched target message: No. L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 518 What to do: Check GOOSE setup. AGGREGATOR ERROR: • Latched target message: No. • Description of problem: The second line of this self-test error indicates the problem with the PMU Aggregator. 7-10 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 519 Description of problem: The ambient temperature is greater than the maximum operating temperature (+80°C). • How often the test is performed: Every hour. • What to do: Remove the L30 from service and install in a location that meets operating temperature standards. UNEXPECTED RESTART: Press “RESET” key •...
  • Page 520 Any abnormal diagnostic condition indicated by the LEDs or the critical failure relay also results in a self-test Plus message, so troubleshooting is described here. For other relays, such at the B95 , see that product’s instruction manual. 7-12 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 521 Card through to the affected Brick. If the problem continues after cleaning, consult the factory. Brick trouble minor self-test • Description of problem: Brick internal self-testing has detected a trouble internal to the Brick. L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 7-13...
  • Page 522 Brick output failing to respond to an output command can only be detected while the command is active, and so in this case the target is latched. A latched target can be unlatched by pressing the faceplate reset key if the command has ended, however the output can still be non-functional. 7-14 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 523: Application Of Settings

    As per the IEEE C37.110-2007 "Guide for the Application of Current Transformers Used for Protective Relaying Purposes," the CT must be capable of a secondary saturation voltage V to avoid DC saturation: Eq. 8-2 where L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 524: Ct Saturation Analysis Tool

    8.1.2 CT saturation analysis tool The CT saturation analysis tool is an Excel spreadsheet provided for users to analyze the L30 reliability during CT saturation caused by an external fault, to investigate the effect of adjusting 87L settings, and to examine the possibility of reducing the CT requirement.
  • Page 525: Current Differential (87l) Settings

    8.2 Current differential (87L) settings 8.2.1 Introduction Software is available from the GE Digital Energy website that is helpful in selecting settings for the specific application. Checking the performance of selected element settings with respect to known power system fault parameters makes it relatively simple to choose the optimum settings for the application.
  • Page 526: Current Differential Pickup

    CHAPTER 8: APPLICATION OF SETTINGS This software program is also useful for establishing test parameters. It is strongly recommended this program be downloaded. Look for the "L90 Test Tool" on the GE Grid Solutions website, for example in the L90 support documents at http://www.gegridsolutions.com/support/l90.htm...
  • Page 527 For relay 1, channel 1 communicates to relay 2 and channel 2 communicates to relay 3 • For relay 2, channel 1 communicates to relay 1 and channel 2 communicates to relay 3 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 528: Channel Asymmetry Compensation Using Gps

    8.3 Channel asymmetry compensation using GPS 8.3.1 Introduction As indicated in the Settings chapter, the L30 provides three basic methods of applying channel asymmetry compensation using GPS. Channel asymmetry can also be monitored with actual values and an indication signalled (FlexLogic operands asserted) if channel asymmetry exceeds preset values.
  • Page 529: Compensation Method 2

    CHANNEL ASYMMETRY COMPENSATION USING GPS If GPS is enabled at all terminals and the GPS signal is present, the L30 compensates for the channel asymmetry. On the loss of the GPS signal, the L30 stores the last measured value of the channel asymmetry per channel and compensates for the asymmetry until the GPS clock is available.
  • Page 530: Compensation Method 3

    Create FlexLogic similar to that shown as follows to switch the 87L element to Settings Group 2 (with most sensitive settings) if the L30 has a valid GPS time reference. If a GPS or 87L communications failure occurs, the L30 switches back to Settings Group 1 with less sensitive settings.
  • Page 531: Instantaneous Elements

    8.4.1 Instantaneous element error during L30 synchronization Two or three L30 relays are synchronized to each other and to system frequency to provide digital differential protection and accurate measurements for other protection and control functions. When an L30 system starts up, the relays adjust their frequency aggressively to bring all relays into synchronization with the system quickly.
  • Page 532 INSTANTANEOUS ELEMENTS CHAPTER 8: APPLICATION OF SETTINGS Element Maximum error on startup (operate Recommended block duration signal vs. setting) Phase instantaneous overcurrent 0.5 seconds 8-10 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 533: Commissioning

    64 Kbaud in a transparent synchronous mode with automatic synchronous character detection and CRC insertion. The Local Loopback Channel Test verifies the L30 communication modules are working properly. The Remote Loopback Channel Test verifies the communication link between the relays meets requirements (BER less than 10–4). All tests are verified by using the internal channel monitoring and the monitoring in the Channel Tests.
  • Page 534: Clock Synchronization Tests

    ACTUAL VALUES  STATUS  CHANNEL TESTS  CHANNEL 1(2) STATUS : “n/a” ACTUAL VALUES  STATUS  CHANNEL TESTS  REMOTE LOOPBACK STATUS : “OK” ACTUAL VALUES  STATUS  CHANNEL TESTS  PFLL STATUS L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 535: Current Differential

    Minimum pickup test with local current only: 3.1. Ensure that all 87L setting are properly entered into the relay and connect a test set to the relay to inject current into Phase A. L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 536: Local-remote Relay Tests

    Download the UR test software from the GE Grid Solutions website (http://www.gegridsolutions.com/products/ support/ur/l90test.zip) or contact GE Grid Solutions for information about the UR current differential test program that allows the user to simulate different operating conditions for verifying correct responses of the relays during commissioning activities.
  • Page 537 These phasors and differential currents can be monitored at the menu where all current magnitudes and angles can be ACTUAL VALUES  METERING  87L DIFFERENTIAL CURRENT observed and conclusions of proper relay interconnections can be made. L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 538 TESTING CHAPTER 9: COMMISSIONING L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 539: Theory Of Operation

    The second major technical consideration is the restraint characteristic, which is the decision boundary between situations that are declared to be a fault and those that are not. The L30 uses an innovative adaptive decision process based on an online computation of the sources of measurement error. In this adaptive approach, the restraint region is an ellipse with variable major axis, minor axis, and orientation.
  • Page 540: L30 Architecture

    CHAPTER 10: THEORY OF OPERATION The third major element of L30 design is sampling synchronization. In order for a differential scheme to work, the data being compared must be taken at the same time. This creates a challenge when data is taken at remote locations.
  • Page 541: Disturbance Detection

    If more than one CT is connected to the relay (breaker-and-the half applications), then a maximum of all (up to four) currents is chosen to be processed for traditional restraint. L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 10-3...
  • Page 542 Outside of the restraint boundary, the computed severity grows as the square of the fault current. The restraint area grows as the square of the error in the measurements. 10-4 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 543: Ground Differential Element

    The line ground differential function allows sensitive ground protection for single-line-to-ground faults, allowing the phase differential element to be set higher (above load) to provide protection for multi-phase faults. The L30 ground differential function calculates ground differential current from all terminal phase currents. The maximum phase current is used for the restraint.
  • Page 544: Clock Synchronization

    A loop filter then uses the frequency and phase angle deviation information to make fine adjustments to the clock frequency. Frequency tracking starts if the current at one or more terminals is above 0.125 pu of nominal; otherwise, the nominal frequency is used. 10-6 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 545: Frequency Detection

    (GPS) to compensate for the channel delay asymmetry. This feature requires a GPS receiver to provide a GPS clock signal to the L30. With this option there are two clocks at each terminal: a local sampling clock and a local GPS clock.
  • Page 546: Phase Detection

    In all cases, frequency deviation information also is used when available. The phase difference between a pair of clocks is computed by an exchange of time stamps. Each relay exchanges time stamps with all other relays that can be reached. 10-8 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 547 This can be done either in software or hardware, provided the jitter is limited to less than plus or minus 130 µs. A fixed bias in the time stamp is acceptable, provided it is the same for all terminals. L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 10-9...
  • Page 548: Phase-locking Filter

    It is very important to combine these two integrators into a single function because it can be shown if two separate integrators are used, they can drift in opposite directions into saturation, because the loop would only drive their sum to zero. 10-10 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 549: Matching Phaselets

    A lost message is detected simply by looking at the sequence numbers of incoming messages. A lost message shows up as a gap in the sequence. L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 10-11...
  • Page 550: Start-up

    10.1.16 Online estimate of measurement errors GE's adaptive elliptical restraint characteristic is a good approximation to the cumulative effects of various sources of error in determining phasors. Sources of error include power system noise, transients, inaccuracy in line charging current computation, current sensor gain, phase and saturation error, clock error, and asynchronous sampling.
  • Page 551: Ct Saturation Detection

    The L30 applies a dedicated mechanism to cope with CT saturation and ensure security of protection for external faults. The relay dynamically increases the weight of the square of errors (the so-called ‘sigma’) portion in the total restraint quantity, but for external faults only.
  • Page 552: Charging Current Compensation

    For short transmission lines the charging current is a small factor and can therefore be treated as an unknown error. In this application, the L30 can be deployed without voltage sensors and the line charging current is included as a constant term in the total variance, increasing the differential restraint current.
  • Page 553: Differential Element Characteristics

    Since the zero sequence voltage is not available, the L30 cannot compensate for the zero sequence current. The compensation scheme continues to work with the breakers open, provided that the voltages are measured on the line side of the breakers.
  • Page 554: Relay Synchronization

    CT errors can be high and/or CT saturation can be experienced. The major difference between the L30 differential scheme and a percent differential scheme is the use of an estimate of errors in the input currents to increase the restraint parameter during faults, permitting the use of more sensitive settings than those used in the traditional scheme.
  • Page 555: Operating Condition Characteristics

    10.2 Operating condition characteristics 10.2.1 Description Characteristics of differential elements can be shown in the complex plane. The operating characteristics of the L30 are fundamentally dependant on the relative ratios of the local and remote current phasor magnitudes and the angles of I as shown in the Restraint Characteristics figure.
  • Page 556 OPERATING CONDITION CHARACTERISTICS CHAPTER 10: THEORY OF OPERATION Figure 10-7: Restraint characteristics 10-18 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 557: Trip Decision Example

    Current Differential section of the Settings chapter. The following figure shows how the L30 settings affect the restraint characteristics. The local and remote currents are 180° apart, which represents an external fault. The breakpoint between the two slopes indicates the point where the restraint area is becoming wider to override uncertainties from CT saturation, fault noise, harmonics, and so on.
  • Page 558: Fault Locator

    The single-ended fault location method assumes that the fault components of the currents supplied from the local (A) and remote (B) systems are in phase. The figure shows an equivalent system for fault location. 10-20 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 559 Depending on the fault type, appropriate voltage and current signals are selected from the phase quantities before applying the preceding equation (the superscripts denote phases, the subscripts denote stations). For AG faults: Eq. 10-41 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 10-21...
  • Page 560 If the VTs are connected in a delta configuration, fault location is performed based on the delta voltages and zero-sequence voltage approximated based on the zero-sequence current: Eq. 10-48 10-22 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 561 CHAPTER 10: THEORY OF OPERATION FAULT LOCATOR where Z is the equivalent zero-sequence impedance behind the relay as entered under the fault report setting menu. SYS0 Figure 10-10: Fault locator scheme L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 10-23...
  • Page 562 FAULT LOCATOR CHAPTER 10: THEORY OF OPERATION 10-24 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 563: Maintenance

    UR Family Communications Guide for the entries. The upper part of the window displays values. The lower part of the window is for factory service use. L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 11-1...
  • Page 564 Float — A numbering system with no fixed number of digits before or after the decimal point. An example is 0.000000. Binary — A numbering system using 0 and 1. An example is 0000-0000-0000-0000. Entries are not saved when closing the window. 11-2 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 565: General Maintenance

    GENERAL MAINTENANCE 11.2 General maintenance The L30 requires minimal maintenance. As a microprocessor-based relay, its characteristics do not change over time. Expected service life is 20 years for UR devices manufactured June 2014 or later when applied in a controlled indoors environment and electrical conditions within specification.
  • Page 566 15 = Role Log in 11.3.1.2 Setting changes file The SETTING_CHANGES.LOG file stores all the setting changes. A total of 1024 events are stored in a circular buffer in non- volatile memory. 11-4 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 567: Copy Settings To Other Device

    11.4 Copy settings to other device Settings from one L30 device can be copied to another L30 device for rapid deployment. The order codes must match. See the Settings File section at the beginning of the Interfaces chapter for a list of settings not deployed, such as IP address.
  • Page 568: Back Up And Restore Settings

    This section describes how to backup settings to a file and how to use that file to restore the settings to the original relay or to a replacement relay. 11-6 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 569: Back Up Settings

    Have this option enabled when you want to keep the IID file from the UR device instead of from another tool. The location of the file is C:\ProgramData\GE Power Management\urpc\Offline, for example.
  • Page 570 Select the Save As option, which displays for firmware 7.3 and later, and select the CID option from the drop-down list. The file is copied from the computer to the location specified. 11-8 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 571: Restore Settings

    This means that the URS file is from UR version 7.30 or higher, has the IEC 61850 software option in the order code, but any IEC 61850 content will be compromised and will need to be configured. L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 11-9...
  • Page 572 EnerVista UR Setup software. The values that these settings had at the time the backup was created are contained within the backup file, accessed through EnerVista UR Setup software. 11-10 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 573: Upgrade Software

    Expand the entry for the UR device. Click the Read Order Code button. The order code and version of the device are populated to the software. Click the OK button to save the change. L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 11-11...
  • Page 574: Upgrade Firmware

    You access the Convert Device Settings option by right-clicking the file in the Offline Window area at the lower left. GE recommends converting settings in firmware steps, for example when converting from 6.0 to 7.4x, convert first to 7.0 then 7.4 in order to follow embedded conversion rules and keep settings. Note that the values of all settings that have been defaulted during conversion are not listed in the conversion report;...
  • Page 575: Replace Module

    Open the enhanced faceplate to the left once the thumb screw has been removed. This allows for easy access of the modules for withdrawal. The new wide-angle hinge assembly in the enhanced front panel opens completely and allows easy access to all modules in the L30. Figure 11-10: Modules inside relay with front cover open (enhanced faceplate) The standard faceplate can be opened to the left once the black plastic sliding latch on the right side has been pushed up, as shown below.
  • Page 576: Battery

    Risk of fire if battery is replaced with incorrect type or polarity. To replace the battery: Turn off the power to the unit. Wait a minimum of three minutes to ensure that there is no power to the battery. 11-14 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 577: Dispose Of Battery

    The battery is marked with this symbol, which may include lettering to indicate cadmium (Cd), lead (Pb), or mercury (Hg). For proper recycling return the battery to your supplier or to a designated collection point. For more information see: www.recyclethis.info. L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 11-15...
  • Page 578 (Cd), plomb (Pb), ou mercure (Hg). Pour le recyclage, retourner la batterie à votre fournisseur ou à un point de collecte. Pour plus d'informations, voir: www.recyclethis.info. 11-16 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 579 (Cd), ołowiu (Pb) lub rtęci (Hg). Dla zapewnienia właściwej utylizacji, należy zwrócić baterie do dostawcy albo do wyznaczonego punktu zbiórki. Więcej informacji można znaleźć na stronie internetowej www.recyclethis.info. L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 11-17...
  • Page 580 905-294-6222 Latin America +55 11 3614 1700 Europe, Middle East, Africa +(34) 94 485 88 00 Asia +86-21-2401-3208 India +91 80 41314617 From GE Part Number 1604-0021-A1, GE Publication Number GEK-113574. 11-18 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 581: Clear Files And Data After Uninstall

    Customers are responsible for shipping costs to the factory, regardless of whether the unit is under warranty. • Fax a copy of the shipping information to the GE Grid Solutions service department in Canada at +1 905 927 5098. Use the detailed return procedure outlined at https://www.gegridsolutions.com/multilin/support/ret_proc.htm...
  • Page 582: Storage

    European Union, dispose of the battery as outlined earlier. To prevent non-intended use of the unit, remove the modules, dismantle the unit, and recycle the metal when possible. 11-20 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 583: A.1 Flexanalog Items

    Frequency rate of change 1 actual value 5860 Freq Rate 2 Value Hz/s Frequency rate of change 2 actual value 6144 SRC 1 Ia RMS Amps Source 1 phase A current RMS L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 584 SRC 2 Igd Angle Degrees Source 2 differential ground current angle 6656 SRC 1 Vag RMS Volts Source 1 phase AG voltage RMS 6658 SRC 1 Vbg RMS Volts Source 1 phase BG voltage RMS L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 585 SRC 2 Vx Mag Volts Source 2 auxiliary voltage magnitude 6754 SRC 2 Vx Angle Degrees Source 2 auxiliary voltage angle 6755 SRC 2 V_0 Mag Volts Source 2 zero-sequence voltage magnitude L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 586 SRC 1 Va Harm[6] Source 1 phase A voltage sixth harmonic 8070 SRC 1 Va Harm[7] Source 1 phase A voltage seventh harmonic 8071 SRC 1 Va Harm[8] Source 1 phase A voltage eighth harmonic L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 587 SRC 1 Vc Harm[3] Source 1 phase C voltage third harmonic 8117 SRC 1 Vc Harm[4] Source 1 phase C voltage fourth harmonic 8118 SRC 1 Vc Harm[5] Source 1 phase C voltage fifth harmonic L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 588 Source 2 phase A voltage twenty-fifth harmonic 8164 SRC 2 Vb THD Source 2 phase B voltage total harmonic distortion (THD) 8165 SRC 2 Vb Harm[2] Source 2 phase B voltage second harmonic L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 589 SRC 2 Vc Harm[22] Source 2 phase C voltage twenty-second harmonic 8211 SRC 2 Vc Harm[23] Source 2 phase C voltage twenty-third harmonic 8212 SRC 2 Vc Harm[24] Source 2 phase C voltage twenty-fourth harmonic L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 590 Remote terminal 1 current phase C angle 9374 Terminal 2 IA Angle Degrees Remote terminal 2 current phase A angle 9375 Terminal 2 IB Angle Degrees Remote terminal 2 current phase B angle L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 591 Phasor measurement unit 1 phase C current angle 9611 PMU 1 Ig Mag Amps Phasor measurement unit 1 ground current magnitude 9613 PMU 1 Ig Angle Degrees Phasor measurement unit 1 ground current angle L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 592 Source 1 phase B current eleventh harmonic 10284 SRC 1 Ib Harm[12] Source 1 phase B current twelfth harmonic 10285 SRC 1 Ib Harm[13] Source 1 phase B current thirteenth harmonic A-10 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 593 Source 2 phase A current eighth harmonic 10347 SRC 2 Ia Harm[9] Source 2 phase A current ninth harmonic 10348 SRC 2 Ia Harm[10] Source 2 phase A current tenth harmonic L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL A-11...
  • Page 594 Source 2 phase C current fifth harmonic 10410 SRC 2 Ic Harm[6] Source 2 phase C current sixth harmonic 10411 SRC 2 Ic Harm[7] Source 2 phase C current seventh harmonic A-12 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 595 Synchrocheck 3 delta phase 10883 Synchchk 3 Synchscp Degrees Synchrocheck 3 synchscope 10884 Synchchk 3 Delta F Volts Synchrocheck 3 delta frequency 10885 Synchchk 3 V1 Mag Volts Synchrocheck 3 V1 mag L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL A-13...
  • Page 596 Breaker 2 amp max phase B 12074 Brk 2 Amp Max C kA2-cyc Breaker 2 amp max phase C 12306 Oscill Num Triggers Oscillography number of triggers 13504 DCmA Ip 1 DCmA input 1 actual value A-14 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 597 RTD input 21 actual value 13573 RTD Ip 22 RTD input 22 actual value 13574 RTD Ip 23 RTD input 23 actual value 13575 RTD Ip 24 RTD input 24 actual value L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL A-15...
  • Page 598 RxGOOSE Analog 4 RxGOOSE analog input 4 45592 RxGOOSE Analog 5 RxGOOSE analog input 5 45594 RxGOOSE Analog 6 RxGOOSE analog input 6 45596 RxGOOSE Analog 7 RxGOOSE analog input 7 A-16 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 599 RxGOOSE analog input 30 45644 RxGOOSE Analog 31 RxGOOSE analog input 31 45646 RxGOOSE Analog 32 RxGOOSE analog input 32 61439 PMU Num Triggers Phasor measurement unit recording number of triggers L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL A-17...
  • Page 600 FLEXANALOG ITEMS APPENDIX A: FLEXANALOG OPERANDS A-18 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 601: B Radius Server Configuration

    UR device for successful authentication, and the shortname is a short, optional alias that can be used in place of the IP address. client 10.0.0.2/24 { secret = testing123 shortname = private-network-1 In the <Path_to_Radius>\etc\raddb folder, create a file called dictionary.ge and add the following content. # ########################################################## GE VSAs ############################################################ VENDOR...
  • Page 602 8.2. Access Settings > Product Setup > Security. Configure the IP address and ports for the RADIUS server. Leave the GE vendor ID field at the default of 2910. Update the RADIUS shared secret as specified in the clients.conf file.
  • Page 603: C Command Line Interface

    This setting cannot be changed using the command line interface. • Use quotes ("") to enclose any parameter containing a space • Commands, options, and parameters are case sensitive L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 604 For non-CyberSentry devices — Set <authentication type> to "traditional". Note that <authentication type> defaults to "traditional" if not specified. Set <account> to "COMMANDS" or "SETTINGS". If not specified, the SETTINGS account is used. Example: SetupCLI URPC login -d "C30 Melbourne" -A traditional -a SETTINGS -w 1password1 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 605 Read settings from device <device> and save them to the .urs file <File>. The <File> must not already exist. The default path to the output file is C:\Users\Public\Public Documents\GE Power Management\URPC\Data Example: SetupCLI URPC getsettings -d C30 -f "C30 Markham.urs"...
  • Page 606 SetupCLI URPC getsettings -d demoDevice -f devicefile.urs SetupCLI URPC compare -f existingfile.urs -r devicefile.urs -o output.txt The output is similar to the following: Comparing settings file aaa.urs : C:\Users\Public\Public Documents\GE Power Management\URPC\Data\ with bbb.urs : C:\Users\Public\Public Documents\GE Power Management\URPC\Data\ Setting Name...
  • Page 607 SetupCLI URPC getsettings -d DEV@SETUP_CLI -f "example file.urs" SetupCLI URPC logout -d DEV@SETUP_CLI SetupCLI URPC exit DEV@SETUP_CLI has to be used as the device name in the commands followed by the 'adddevice' command. L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 608 COMMAND LINE INTERFACE APPENDIX C: COMMAND LINE INTERFACE L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 609: Revision History

    This chapter provides the warranty and revision history. D.1 Warranty For products shipped as of 1 October 2013, GE Grid Solutions warrants most of its GE manufactured products for 10 years. For warranty details including any limitations and disclaimers, see the Terms and Conditions at https://www.gegridsolutions.com/multilin/warranty.htm...
  • Page 610 1601-9050-AE1 7.41x 31 January 2017 17-3427 1601-9050-AE3 7.4x 28 April 2017 17-3561 Table D-2: Major changes for L30 manual version AE3 (English) Page Description General revision Updated order codes 5-150 Updated PMU Basic Configuration settings 11-5 Added Copy Settings to Other Device section...
  • Page 611 Added Monitoring section 11-2 Added Retrieve Files section Added Command Line Interface appendix Table D-5: Major changes for L30 manual version AB2 (English) Page Description Updated document throughout, including numbers of elements and FlexLogic operands table Added EAC compliance information throughout, including logo on title page, rear panel, added specifications, added life...
  • Page 612 REVISION HISTORY APPENDIX D: MISCELLANEOUS L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 613 Contact Output FPGA Field-programmable Gate Array Communication FREQ Frequency COMM Communications Frequency-Shift Keying COMP Compensated, Comparison File Transfer Protocol CONN Connection FlexElement™ CONT Continuous, Contact Forward CO-ORD Coordination Central Processing Unit Generator L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 614 Permissive Under-reaching Transfer Trip Manual / Manually Pulse Width Modulated Maximum Power Model Implementation Conformance Minimum, Minutes QUAD Quadrilateral Man Machine Interface Manufacturing Message Specification Rate, Reverse Minimum Response Time Registration Authority L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 615 Transport Selector Time Undercurrent Time Undervoltage TX (Tx) Transmit, Transmitter Under Undercurrent Utility Communications Architecture User Datagram Protocol Underwriters Laboratories UNBAL Unbalance Universal Relay Universal Recloser Control .URS Filename extension for settings files L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 616 ABBREVIATIONS L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 617: Approvals ...............................................................................................................................2-43

    ............7-10 AWG wire size ............ 3-12, 3-32, 3-36, 3-39 Alarm LEDs ...................5-106 AND gate explained ................4-53 ANSI device numbers ................2-2 Apparent power ..................6-18 Back up settings ..............5-46, 11-6 specifications ..................2-34 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 618 ....................5-299 timeout ....................5-39 Charging current compensation ..........5-124 web server ................... 5-86 CID file, SCD file ............5-62, 5-64, 5-65 Compare settings ................11-5 Compliance ..................... 2-43 COMTRADE files, view ............... 4-50 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 619 FlexCurves ................5-138, 5-199 Digital elements IAC ......................5-197 application example ..............5-265 IEC ......................5-196 FlexLogic operands ...............5-170 IEEE .......................5-195 logic diagram ...................5-264 inverse time undervoltage ............5-228 settings ....................5-263 types ....................5-194 Cutout, panel ...................3-2, 3-3 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL...
  • Page 620 ....................11-20 Factory default reset ..............5-8, 5-22 Far-End Fault Indication ..............5-34 Fast form-C relay specifications ..........2-37