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GE 760 User Manual

GE 760
504 pages
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R
E
G
I
S
T
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D
750/760
FEEDER MANAGEMENT RELAY
®
Instruction Manual
Firmware Rev.: 402-000
Analog Rev.: 27H402A4.000
Control Rev.: 27H402C4.000
Manual P/N: 1601-0044-AL (GEK-106293A)
Copyright © 2002 GE Power Management
GE Power Management
215 Anderson Avenue, Markham, Ontario
Canada L6E 1B3
Tel: (905) 294-6222 Fax: (905) 294-8512
Internet: http://www.GEindustrial.com/pm
Manufactured under an
ISO9001 Registered system.
g
GE Power Management
760 Feeder Management
®
818789A3.CDR
RELAY IN SERVICE
760 STATUS SYSTEM STATUS OUTPUT STATUS
BREAKER OPEN 1 TRIP
TRIP BREAKER CLOSED 2 CLOSE
ALARM
RECLOSURE
ENABLED
3 AUXILIARY
PICKUP
RECLOSURE
DISABLED
4 AUXILIARY
SETPOINT
GROUP 1
SETPOINT
GROUP 2
SETPOINT
GROUP 3
SETPOINT
GROUP 4
RECLOSURE
IN PROGRESS
5 AUXILIARY
RESET
OPEN
NEXT
SETPOINT
MESSAGE
VALUE
ACTUAL
CLEAR
STORE
CLOSE
RECLOSURE
LOCKOUT
6 AUXILIARY
LOCAL
7 AUXILIARY
8
PROGRAM PORTPROGRAM
PORT
REMOTE
BREAKER
SELF-TEST
WARNING
789
456
12
0
3
HELP
.
g

Table of Contents

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GE 760 Specifications

General IconGeneral
BrandGE
Model760
CategoryRelays
LanguageEnglish

Summary

1 PRODUCT OVERVIEW

1.2 TECHNICAL SPECIFICATIONS

Details the technical specifications of the relay, covering inputs, outputs, protection elements, control, communications, and physical properties.

2 GETTING STARTED

3 INSTALLATION

3.2 TYPICAL WIRING

Covers important interconnection aspects for instrument transformer inputs, other inputs, outputs, communications, and grounding.

4 750/760 PC PROGRAM

4.1 OVERVIEW

Outlines the capabilities of the PC Program for training, testing, setpoint management, simulation, and firmware upgrades.

4.4 USING 750/760 PC

Details communication configuration, firmware upgrading, entering setpoints, viewing actual values, and saving/loading setpoint files.

5 FRONT PANEL OPERATION

5.1 DESCRIPTION

Details the front panel interface components: display, LED status indicators, control keys, and RS232 program port.

6 ACTUAL VALUES

6.3 A2 METERING

Explains how the relay measures currents, voltages, frequency, and other derived quantities.

7 SETPOINTS

7.3 SETPOINT ACCESS SECURITY

Details hardware (jumper) and passcode security features to protect against unauthorized setpoint changes.

8 S1 RELAY SETUP

8.1 PASSCODE

Explains the passcode security feature and its settings for enabling/disabling setpoint access.

8.2 COMMUNICATIONS

Details communication ports (COM1, COM2, RS232) and their programmable settings.

9 S2 SYSTEM SETUP

9.1 CURRENT SENSING

Explains the critical setpoints for current sensing, including CT input specifications.

10 S3 LOGIC INPUTS

10.4 CONTROL FUNCTIONS

Details setpoints for control functions like Local Mode, Reset, Remote Open/Close, Cold Load Pickup, and Setpoint Group control.

10.6 BLOCK FUNCTIONS

Explains how logic input functions block various operations within the relay.

10.7 BLOCK OVERCURRENT FUNCTIONS

Explains how logic input functions allow overcurrent protection elements to be blocked.

11 S4 OUTPUT RELAYS

11.1 OVERVIEW

Describes the eight electromechanical output relays and their configuration options.

12 S5 PROTECTION

12.1 TIME OVERCURRENT CURVE CHARACTERISTICS

Explains programming of time-current characteristics using Pickup, Curve Shape, Multiplier, and Reset Time.

12.2 DIRECTIONAL OVERCURRENT CHARACTERISTICS

Explains directional overcurrent relaying and details phase, neutral, ground, and negative sequence directional elements.

12.7 VOLTAGE

Explains undervoltage and overvoltage protection elements for various applications.

12.9 BREAKER FAILURE

Details the breaker failure feature which monitors phase currents after a trip command.

14 S7 CONTROL

14.1 SETPOINT GROUPS

Explains how setpoints are reproduced in four groups for automatic and manual changes to protection settings.

14.3 MANUAL CLOSE BLOCKING

Explains how to program the relay to block overcurrent elements during manual breaker close.

14.4 COLD LOAD PICKUP BLOCKING

Details programming to block instantaneous overcurrents and raise pickup levels during cold load conditions.

14.7 TRANSFER

Describes the Transfer scheme for minimizing outage effects by opening/closing breakers to transfer to a live source.

14.8 AUTORECLOSE (760 ONLY)

Explains the flexible autoreclose scheme, including dead times, current supervision, and zone coordination.

15 S8 TESTING

15.1 OUTPUT RELAYS

Details the ability to override normal function of solid state and output contacts for testing.

15.4 SIMULATION

Describes the simulation feature for testing relay functionality without external inputs, including prefault, fault, and postfault states.

16 COMMUNICATIONS

16.1 OVERVIEW

Provides general notes on the 750/760 relay's communication capabilities using Modbus or DNP protocols.

16.3 MODBUS PROTOCOL

Discusses details of the Modbus protocol, including data link layer, packet format, function codes, and CRC-16 algorithm.

16.4 MODBUS MEMORY MAP

Provides a detailed organization of the Modbus memory map, including register addresses, descriptions, ranges, units, types, and factory defaults.

17 COMMISSIONING

17.1 OVERVIEW

Outlines procedures for verifying proper relay operation and programming.

17.2 PRELIMINARIES

Covers safety precautions, conventions, required test equipment, and installation checks.

17.5 OUTPUT RELAYS

Describes procedures for testing output relays by forcing them to energize or de-energize.

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