Toshiba GRZ100 B Series Bedienungsanleitung

6F2S0846

INSTRUCTION MANUAL

DISTANCE RELAY

GRZ100 - ∗∗∗B

©TOSHIBA Corporation 2006

( Ver. 0.5)

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6F2S0846

Safety Precautions

Before using this product, please read this chapter carefully.

This chapter describes the safety precautions recommended when using the GRZ100. Before

installing and using the equipment, this chapter must be thoroughly read and understood.

Explanation of symbols used

Signal words such as DANGER, WARNING, and two kinds of CAUTION, will be followed by

important safety information that must be carefully reviewed.

Indicates an imminently hazardous situation which will result in death or

serious injury if you do not follow the instructions.

Indicates a potentially hazardous situation which could result in death or

serious injury if you do not follow the instructions.

CAUTION Indicates a potentially hazardous situation which if not avoided, may result in

minor injury or moderate injury.

CAUTION Indicates a potentially hazardous situation which if not avoided, may result in

property damage.

DANGE

WARNING

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•Current transformer circuit

Never allow the current transformer (CT) secondary circuit connected to this equipment to be

opened while the primary system is live. Opening the CT circuit will produce a dangerously high

voltage.

•Exposed terminals

Do not touch the terminals of this equipment while the power is on, as the high voltage generated

is dangerous.

•Residual voltage

Hazardous voltage can be present in the DC circuit just after switching off the DC power supply. It

takes about 30 seconds for the voltage to discharge.

•Fiber optic

Do not view directly with optical instruments.

CAUTION

•Earth

The earthing terminal of the equipment must be securely earthed.

CAUTION

•Operating environment

The equipment must only be used within the range of ambient temperature, humidity and dust, etc.

detailed in the specification and in an environment free of abnormal vibration.

•Ratings

Before applying AC voltage and current or the DC power supply to the equipment, check that they

conform to the equipment ratings.

•Printed circuit board

Do not attach and remove printed circuit boards when DC power to the equipment is on, as this

may cause the equipment to malfunction.

•External circuit

When connecting the output contacts of the equipment to an external circuit, carefully check the

supply voltage used in order to prevent the connected circuit from overheating.

•Connection cable

Carefully handle the connection cable without applying excessive force.

•Modification

Do not modify this equipment, as this may cause the equipment to malfunction.

DANGE

WARNING

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•Short-link

Do not remove a short-link which is mounted at the terminal block on the rear of the relay before

shipment, as this may cause the performance of this equipment such as withstand voltage, etc., to

reduce.

•Tripping circuit connections

Must connect the FD (Fault Detector) output contact with A- to C-phase tripping output contacts

in series in case of the model 400 and 500 series.

•Disposal

When disposing of this product, do so in a safe manner according to local regulations.

This product contains a battery, which should be removed at the end-of-life of the product. The

battery must be recycled or disposed of in accordance with local regulations. The battery can be

removed by withdrawing the Signal Processing module (SPM) from the relay case, and cutting the

connecting leads and plastic strap which hold the battery.

•Plastics material

This product contains the following plastics material.

- ABS, Polycarbonate, Acrylic resins

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6F2S0846

Contents

Safety Precautions 1

1. Introduction 9

2. Application Notes 12

2.1 Power System Protection - Basic Concepts 12

2.1.1 The Function of The Protection Relay 12

2.1.2 Protection Relay Requirements 12

2.1.4 Distance Relay - General Performance 14

2.1.5 Power Swing and Out-of-Step 15

2.1.6 Redundant Configuration of Protection Relay and Improvement of

Reliability 16

2.2 Principle of Distance Measurement 17

2.2.1 Phase Fault 17

2.2.2 Earth Fault 18

2.3 Multi-Terminal Line Protection 20

2.3.1 Increased Use of Multi-Terminal Lines 20

2.3.2 Protection Problems on Three-Terminal Application 20

2.3.3 Three-Terminal Line Protection 22

2.4 Protection Scheme 24

2.4.1 Time-Stepped Distance Protection 24

2.4.2 Zone 1 Extension Protection 40

2.4.3 Command Protection 43

2.4.4 Directional Earth Fault Protection 60

2.4.5 Overcurrent Backup Protection 65

2.4.6 Thermal Overload Protection 69

2.4.7 Switch-Onto-Fault Protection 72

2.4.8 Stub Protection 73

2.4.9 Overvoltage and Undervoltage Protection 74

2.4.10 Broken Conductor Protection 81

2.4.11 Breaker Failure Protection 84

2.4.12 Out-of-Step Protection 87

2.4.13 Voltage Transformer Failure Supervision 89

2.4.14 Power Swing Blocking 91

2.4.15 Tripping Output Signals 95

2.4.16 Fault Detector 97

2.5 Characteristics of Measuring Elements 100

2.5.1 Distance Measuring Elements Z1, Z1X, Z2, ZF, Z3, Z4, ZR1, ZR2, ZND

and PSB 100

2.5.2 Phase Selection Element UVC 109

2.5.3 Directional Earth Fault Elements DEFF and DEFR 109

2.5.4 Inverse Definite Minimum Time (IDMT) OC, EF, DEF Elements 111

2.5.5 Out-of-Step Element OST 112

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2.5.6 Voltage and Synchronism Check Elements OVL, UVL, OVB, UVB, and

SYN 113

2.5.7 Current Change Detection Elements OCD and OCDP 114

2.5.8 Negative Sequence Directional Elements DOCNF and DOCNR 115

2.5.9 Level Detectors 116

2.5.10 Fault Detector Elements 117

2.6 Autoreclose 119

2.6.1 Application 119

2.6.2 Scheme Logic 121

2.6.3 Setting 131

2.6.4 Autoreclose Output Signals 133

2.7 Fault Locator 134

2.7.1 Application 134

2.7.2 Distance to Fault Calculation 134

2.7.3 Starting Calculation 135

2.7.4 Displaying Location 136

2.7.5 Setting 136

3. Technical Description 138

3.1 Hardware Description 138

3.1.1 Outline of Hardware Modules 138

3.1.2 Transformer Module 145

3.1.3 Signal Processing Module 146

3.1.4 Binary Input and Output Module 147

3.1.5 Human Machine Interface (HMI) Module 152

3.1.6 Fault Detector Module 154

3.2 Input and Output Signals 155

3.2.1 Input Signals 155

3.2.2 Binary Output Signals 157

3.2.3 PLC (Programmable Logic Controller) Function 158

3.3 Automatic Supervision 159

3.3.1 Basic Concept of Supervision 159

3.3.2 Relay Monitoring and Testing 159

3.3.3 CT Circuit Current Monitoring 160

3.3.4 Signal Channel Monitoring and Testing 160

3.3.5 Disconnector Monitoring 161

3.3.6 Failure Alarms 161

3.3.7 Trip Blocking 162

3.3.8 Setting 162

3.4 Recording Function 163

3.4.1 Fault Recording 163

3.4.2 Event Recording 165

3.4.3 Disturbance Recording 165

3.5 Metering Function 167

4. User Interface 168

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4.1 Outline of User Interface 168

4.1.1 Front Panel 168

4.1.2 Communication Ports 170

4.2 Operation of the User Interface 172

4.2.1 LCD and LED Displays 172

4.2.2 Relay Menu 174

4.2.3 Displaying Records 177

4.2.4 Displaying Status Information 182

4.2.5 Viewing the Settings 186

4.2.6 Changing the Settings 187

4.2.7 Testing 210

4.3 Personal Computer Interface 216

4.4 Relay Setting and Monitoring System 216

4.5 IEC 60870-5-103 Interface 217

4.6 Clock Function 217

5. Installation 218

5.1 Receipt of Relays 218

5.2 Relay Mounting 218

5.3 Electrostatic Discharge 218

5.4 Handling Precautions 218

5.5 External Connections 219

6. Commissioning and Maintenance 220

6.1 Outline of Commissioning Tests 220

6.2 Cautions 221

6.2.1 Safety Precautions 221

6.2.2 Cautions on Tests 221

6.3 Preparations 222

6.4 Hardware Tests 223

6.4.1 User Interfaces 223

6.4.2 Binary Input Circuit 224

6.4.3 Binary Output Circuit 225

6.4.4 AC Input Circuits 226

6.5 Function Test 227

6.5.1 Measuring Element 227

6.5.2 Timer Test 246

6.5.3 Protection Scheme 247

6.5.4 Metering and Recording 252

6.5.5 Fault Locator 252

6.6 Conjunctive Tests 253

6.6.1 On Load Test 253

6.6.2 Signaling Circuit Test 253

6.6.3 Tripping and Reclosing Circuit Test 255

6.7 Maintenance 257

6.7.1 Regular Testing 257

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6.7.2 Failure Tracing and Repair 257

6.7.3 Replacing Failed Modules 259

6.7.4 Resumption of Service 261

6.7.5 Storage 261

7. Putting Relay into Service 262

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Appendix A Block Diagrams 263

Appendix B Signal List 271

Appendix C Variable Timer List 307

Appendix D Binary Input/Output Default Setting List 309

Appendix E Details of Relay Menu and LCD & Button Operation 321

Appendix F Case Outline 331

Appendix G Typical External Connections 339

Appendix H Relay Setting Sheet 351

Appendix I Commissioning Test Sheet (sample) 377

Appendix J Return Repair Form 383

Appendix K Technical Data 389

Appendix L Symbols Used in Scheme Logic 401

Appendix M Example of Setting Calculation 405

Appendix N IEC60870-5-103: Interoperability and Troubleshooting 417

Appendix O Programmable Reset Characteristics and Implementation of Thermal

Model to IEC60255-8 429

Appendix P Inverse time Characteristics 433

Appendix Q Failed Module Tracing and Replacement 437

Appendix R Ordering 443

The data given in this manual are subject to change without notice. (Ver.0.5)

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6F2S0846

1. Introduction

GRZ100 is a fully numeric distance protection for application to transmission lines on solidly

earthed network.

The GRZ100 provides the following protection schemes.

- Time-stepped distance protection with four forward zones, three reverse zones, and one

non-directional zone

- Zone 1 extension protection

- Command protection (Distance protection using telecommunication)

- Overcurrent backup protection

- Thermal overload protection

- Switch-on-to-fault and stub protection

- Circuit breaker failure protection

- Broken conductor detection

- Out-of-step protection

- Overvoltage and undervoltage protection

For high-resistance earth faults, the GRZ100 provides the following directional earth fault

protections.

- Directional earth fault protection

- Directional earth fault protection utilizing telecommunications facilities

The GRZ100 actuates high-speed single-shot autoreclose or multi-shot autoreclose.

The GRZ100 provides the following metering and recording functions.

- Metering

- Fault record

- Event record

- Fault location

- Disturbance record

The GRZ100 provides the following menu-driven human interfaces for relay setting or viewing of

stored data.

- Relay front panel; LCD, LED display and operation keys

- Local PC

- Remote PC

Password protection is provided to change settings. Eight active setting groups are provided. This

allows the user to set one group for normal operating conditions while other groups may be set to

cover alternative operating conditions.

GRZ100 provides either two or three serial ports, and an IRIG-B port for an external clock

connection. A local PC can be connected via the RS232C port on the front panel of the relay.

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