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Toshiba GRT100 Manual

Safety Precautions

Introduction

Application Notes

Protection Scheme

Current Differential Protection

Matching of CT Secondary Currents

Connection between CT Secondary Circuit and the GRT100

Setting

Restricted Earth Fault Protection

Overcurrent Protection

Thermal Overload Protection

Frequency Protection

Overexcitation Protection

Trip by External Devices

Tripping Output

Characteristics of Measuring Elements

High-set Overcurrent Element HOC

Inverse Time Overcurrent Element OCI and EFI

Definite Time Overcurrent element OC and EF

Thermal Overload Element THR

Frequency Element FRQ

Technical Description

Transformer Module

Signal Processing Module

Binary Input and Output Module

Human Machine Interface (HMI) Module

Input and Output Signals

Binary Output Signals

PLC (Programmable Logic Controller) Function

Automatic Supervision

Failure Alarms

Recording Function

Event Recording

Disturbance Recording

Metering Function

User Interface

Communication Ports

Operation of the User Interface

Relay Menu

Displaying Records

Displaying the Status

Viewing the Settings

Testing

Personal Computer Interface

IEC 60870-5-103 Interface

Installation

External Connections

Commissioning and Maintenance

Cautions

Preparations

Hardware Tests

Binary Input Circuit

Binary Output Circuit

AC Input Circuits

Function Test

Timer Test

Conjunctive Tests

Maintenance

Replacing Failed Modules

Resumption of Service

Putting Relay into Service

Appendix A Block Diagram

Appendix B Signal List

Appendix C Variable Timer List

Appendix D Binary Output Default Setting List

Appendix E Details of Relay Menu and LCD & Button Operation

Appendix F Case Outline

Appendix G External Connections

Appendix H Relay Setting Sheet

Appendix I Commissioning Test Sheet (sample)

Appendix J Return Repair Form

Appendix K Technical Data

Appendix M Symbols Used in Scheme Logic

Appendix N Implementation of Thermal Model to IEC60255-8

Appendix O IEC60870-5-103: Interoperability and Troubleshooting

Appendix Q Inverse Time Characteristics

Appendix R Failed Module Tracing and Replacement

Appendix S Ordering

GRT100 Series

Toshiba GRT100 Manual

Product

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