Toshiba GRZ100-211B User manual

6F2S0834
INSTRUCTION MANUAL
DISTANCE RELAY
WITH INTEGRAL DIGITAL COMMUNICATION
GRZ100 - 211B, 214B, 216B, 311B
- 221B, 224B, 226B, 321B, 323B
©TOSHIBA Corporation 2005
All Rights Reserved.
( Ver. 0.3 )
www . ElectricalPartManuals . com

1
6F2S0834
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
R
WARNING
www . ElectricalPartManuals . com

2
6F2S0834
•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
Invisible laser radiation
Do not view directly with optical instruments.
Class 1M laser product
- the maximum output of laser radiation: 0.2 mW
- the pulse duration: 79.2 ns
- the emitted wavelength(s): 1310 nm
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 the 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.
DANGE
R
WARNING
www . ElectricalPartManuals . com

3
6F2S0834
•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.
•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.
•Disposal
When disposing of this equipment, do so in a safe manner according to local regulations.
www . ElectricalPartManuals . com

4
6F2S0834
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
2.1.3 Main Protection and Backup Protection 14
2.1.4 Distance Relay - General Performance 14
2.1.5 Power Swing and Out-of-Step 15
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 High-Resistance Earth Fault Protection 60
2.4.5 Overcurrent Backup Protection 67
2.4.6 Thermal Overload Protection 71
2.4.7 Switch-Onto-Fault Protection 73
2.4.8 Stub Protection 75
2.4.9 Overvoltage and Undervoltage Protection 76
2.4.10 Broken Conductor Protection 83
2.4.11 Transfer Trip Function 86
2.4.12 Breaker Failure Protection 88
2.4.13 Out-of-Step Protection 91
2.4.14 Voltage Transformer Failure Supervision 93
2.4.15 Power Swing Blocking 95
2.4.16 Tripping Output Signals 99
2.5 Communication System 100
2.5.1 Integral Digital Communication Interface 100
2.5.2 External Communication Interface 110
2.6 Characteristics of Measuring Elements 113
2.6.1 Distance Measuring Elements Z1, Z1X, Z2, ZF, Z3, Z4, ZR1, ZR2, ZND
and PSB 113
2.6.2 Phase Selection Element UVC 121
2.6.3 Directional Earth Fault Elements DEFF and DEFR 122
www . ElectricalPartManuals . com

5
6F2S0834
2.6.4 Inverse Definite Minimum Time Overcurrent Element IDMT 123
2.6.5 Out-of-Step Element OST 124
2.6.6 Voltage and Synchronism Check Elements OVL, UVL, OVB, UVB, and
SYN 125
2.6.7 Current Change Detection Elements OCD and OCDP 126
2.6.8 Negative Sequence Directional Elements DOCNF and DOCNR 127
2.6.9 Level Detectors 128
2.7 Autoreclose 129
2.7.1 Application 129
2.7.2 Scheme Logic 131
2.7.3 Setting 141
2.7.4 Autoreclose Output Signals 144
2.8 Fault Locator 145
2.8.1 Application 145
2.8.2 Starting Calculation 146
2.8.3 Displaying Location 146
2.8.4 Distance to Fault Calculation 146
2.8.5 Setting 150
3. Technical Description 152
3.1 Hardware Description 152
3.1.1 Outline of Hardware Modules 152
3.1.2 Transformer Module 156
3.1.3 Signal Processing Module 157
3.1.4 Binary Input and Output Module 158
3.1.5 Human Machine Interface (HMI) Module 163
3.2 Input and Output Signals 165
3.2.1 Input Signals 165
3.2.2 Binary Output Signals 169
3.2.3 PLC (Programmable Logic Controller) Function 170
3.3 Automatic Supervision 171
3.3.1 Basic Concept of Supervision 171
3.3.2 Relay Monitoring and Testing 171
3.3.3 CT Circuit Current Monitoring 172
3.3.4 Signal Channel Monitoring for Integral Digital Communication 172
3.3.5 Signal Channel Monitoring and Testing for External Communication 173
3.3.6 Relay Address Monitoring 174
3.3.7 Disconnector Monitoring 174
3.3.8 Failure Alarms 174
3.3.9 Trip Blocking 175
3.3.10 Setting 176
3.4 Recording Function 178
3.4.1 Fault Recording 178
3.4.2 Event Recording 180
3.4.3 Disturbance Recording 180
3.5 Metering Function 182
www . ElectricalPartManuals . com

6
6F2S0834
4. User Interface 183
4.1 Outline of User Interface 183
4.1.1 Front Panel 183
4.1.2 Communication Ports 185
4.2 Operation of the User Interface 187
4.2.1 LCD and LED Displays 187
4.2.2 Relay Menu 189
4.2.3 Displaying Records 192
4.2.4 Displaying Status Information 197
4.2.5 Viewing the Settings 202
4.2.6 Changing the Settings 203
4.2.7 Testing 227
4.3 Personal Computer Interface 234
4.4 Relay Setting and Monitoring System 234
4.5 IEC 60870-5-103 Interface 235
4.6 Clock Function 235
5. Installation 236
5.1 Receipt of Relays 236
5.2 Relay Mounting 236
5.3 Electrostatic Discharge 236
5.4 Handling Precautions 236
5.5 External Connections 237
6. Commissioning and Maintenance 239
6.1 Outline of Commissioning Tests 239
6.2 Cautions 240
6.2.1 Safety Precautions 240
6.2.2 Cautions on Tests 240
6.3 Preparations 241
6.4 Hardware Tests 242
6.4.1 User Interfaces 242
6.4.2 Binary Input Circuit 243
6.4.3 Binary Output Circuit 244
6.4.4 AC Input Circuits 245
6.5 Function Test 246
6.5.1 Measuring Element 246
6.5.2 Timer Test 265
6.5.3 Protection Scheme 266
6.5.4 Metering and Recording 272
6.5.5 Fault Locator 272
6.6 Conjunctive Tests 273
6.6.1 On Load Test 273
6.6.2 Signaling Circuit Test 273
6.6.3 Tripping and Reclosing Circuit Test 275
6.7 Maintenance 277
www . ElectricalPartManuals . com

7
6F2S0834
6.7.1 Regular Testing 277
6.7.2 Failure Tracing and Repair 277
6.7.3 Replacing Failed Modules 279
6.7.4 Resumption of Service 281
6.7.5 Storage 281
7. Putting Relay into Service 282
www . ElectricalPartManuals . com

8
6F2S0834
Appendix A Block Diagrams 283
Appendix B Signal List 287
Appendix C Variable Timer List 323
Appendix D Binary Input/Output Default Setting List 325
Appendix E Details of Relay Menu and LCD & Button Operation 333
Appendix F Case Outline 343
Appendix G External Connections 351
Appendix H Relay Setting Sheet 357
Appendix I Commissioning Test Sheet (sample) 383
Appendix J Return Repair Form 389
Appendix K Technical Data 395
Appendix L Symbols Used in Scheme Logic 407
Appendix M Example of Setting Calculation 411
Appendix N IEC60870-5-103: Interoperability 423
Appendix O Programmable Reset Characteristics and Implementation of
Thermal Model to IEC60255-8 435
Appendix P Data Transmission Format 439
Appendix Q Relay Operation under Communication Failure in Backup Carrier
Scheme 443
Appendix R Inverse Time Characteristics 447
Appendix S Failed Module Tracing and Replacement 451
Appendix S Ordering 459
The data given in this manual are subject to change without notice. (Ver.0.3)
www . ElectricalPartManuals . com

9
6F2S0834
1. Introduction
GRZ100 is a fully numeric distance protection incorporating integral digital communication
channels for teleprotection signalling. Either one or two communication channels are provided,
suitable for relay-to-relay connection via fibre-optic links, or via electrical interfaces to a digital
communication network. GRZ100 can be configured using the integral communication channels
to support the following functions:
- Phase-segregated command protection distance schemes (PUP, POP, BOP and UOP with
week infeed and current reversal logic).
- Phase-segregated command protection DEF schemes (POP, BOP and UOP).
- Command protection signalling for tripping during a power swing.
- Command protection for 2- or 3-terminal applications.
- Single-phase autoreclosing available for carrier tripping.
- Phase-segregated transfer trip (intertripping).
- Transmission of binary signals for user-configurable applications.
- Transmission of measured values to be displayed at the remote terminals.
- Synchronisation of the clocks at the various terminals.
- Fault-location by use of remote-end data in the case of 3-terminal applications.
- Continuous monitoring of the communication channels, with capability to provide
dual-redundant channels in the case of a 2-ended system, and automatic re-routing of signals
in the event of a communication channel failure in a 3-ended system.
GRZ100 can be also applied with conventional external communication channels.
Other features of GRZ100 are as follows:
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
- High-resistance earth fault protection
- Broken conductor detection
- Overcurrent backup protection
- Thermal overload protection
- Switch-on-to-fault and stub protection
- Breaker failure protection
- Out-of-step trip protection
- Power swing blocking
The GRZ100 actuates high-speed single-shot autoreclose or multi-shot autoreclose.
The GRZ100 is a member of the G-series family of numerical relays which utilise common
hardware modules with the common features:
www . ElectricalPartManuals . com