Toshiba GRD150 User manual

6F2S0842
INSTRUCTION MANUAL
FEEDER MANAGER
GRD150
©TOSHIBA Corporation 2005
All Rights Reserved.
(Ver. 0.6)

⎯ 1⎯
6F2S0842
Safety Precautions
Before using this product, please read this chapter carefully.
This chapter describes the safety precautions recommended when using the GRD150. 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

⎯ 2⎯
6F2S0842
•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 approximately 30 seconds for the voltage to discharge.
•Fiber optic
When connecting this equipment via an optical fiber, do not look directly at the optical signal.
CAUTION
•Earth
The earthing terminal of the equipment must be securely earthed.
CAUTION
•Operating environment
The equipment must only used within the range of ambient temperature, humidity and dust
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.
•Connection cable
Carefully handle the connection cable without applying excessive force.
DANGE
R
WARNING

⎯ 3⎯
6F2S0842
•Modification
Do not modify this equipment, as this may cause the equipment to malfunction.
•Disposal
When disposing of this equipment, do so in a safe manner according to local regulations.
环保使用期限标识是根据《电子信息产品污染控制管理办法》以及《电子信息产品污染控制标识要求》
(SJ/T11364-2006)、《电子信息产品环保使用期限通则》制定的，适用于中国境内销售的电子信息产品的标识。
只要按照安全及使用说明内容在正常使用电子信息产品情况下，从生产日期算起，在此期限内产品中含有的有毒
有害物质不致发生外泄或突变，不致对环境造成严重污染或对其人身、财产造成严重损害。
产品正常使用后，要废弃在环保使用年限内或者刚到年限的产品，请根据国家标准采取适当的方法进行处置。
另外，此期限不同于质量/功能的保证期限。
The Mark and Information are applicable for People's Republic of China only.

⎯ 4⎯
6F2S0842
Contents
Safety Precautions 1
1. Introduction 9
2. Application Notes 12
2.1 Overcurrent and Undercurrent Protection 12
2.1.1 Non-directional Overcurrent Protection 12
2.1.1.1 Inverse Time Overcurrent Protection 12
2.1.1.2 Definite Time Overcurrent Protection 16
2.1.1.3 Instantaneous Overcurrent Protection 17
2.1.1.4 Staged Definite Time Overcurrent Protection 17
2.1.1.5 Scheme Logic 18
2.1.1.6 Setting 23
2.1.1.7 Sensitive Earth Fault Protection 27
2.1.1.8 Negative Sequence Overcurrent Protection 33
2.1.1.9 Application of Protection Inhibits 36
2.1.2 Directional Overcurrent Protection 38
2.1.2.1 Application of Directional Overcurrent Protection 38
2.1.2.2 Directional Characteristics 40
2.1.2.2 Scheme Logic 42
2.1.2.3 Setting 46
2.1.2.4 Directional Sensitive Earth Fault Protection 49
2.1.2.5 Directional Negative Sequence Overcurrent Protection 53
2.1.2.6 Blocked Busbar Protection 55
2.1.3 Phase Undercurrent Protection 57
2.1.4 Thermal Overload Protection 59
2.1.6 Breaker Failure Protection 65
2.1.7 Countermeasures for Magnetising Inrush 68
2.1.7.1 Inrush Current Detector 68
2.1.7.2 Cold Load Protection 69
2.1.8 CT Requirements 72
2.1.8.1 Phase Fault and Earth Fault Protection 72
2.1.8.3 Sensitive Earth Fault Protection 73
2.1.8.4 Restricted Earth Fault Protection 73
2.2 Overvoltage and Undervoltage Protection 74
2.2.1 Phase Overvoltage Protection 74
2.2.1.1 Inverse Time Overvoltage Protection 74
2.2.1.2 Definite Time Overvoltage Protection 77
2.2.1.3 Setting 77
2.2.2 Phase Undervoltage Protection 78
2.2.2.1 Inverse Time Undervoltage Protection 78
2.2.2.2 Definite Time Undervoltage Protection 81
2.2.2.3 Setting 81

⎯ 5⎯
6F2S0842
2.2.3 Zero Phase Sequence Overvoltage Protection 82
2.2.4 Negative Phase Sequence Overvoltage Protection 85
2.3 Frequency Protection 87
2.4 Trip Signal Output 92
2.5 Autoreclose 95
2.5.1 Autoreclosing Scheme 95
2.5.2 Scheme Logic 96
2.5.3 Setting 101
2.5.4 Characteristics of Measuring Elements 103
2.6 Control Function 105
2.6.1 MIMIC Configuration 105
2.6.2 Control 107
2.6.3 Synchronism and Voltage Check 112
2.6.4 Metering and Counter Function 113
2.7 PLC (Programmable Logic Control) Function 121
3. Technical Description 124
3.1 Hardware Description 124
3.1.1 Outline of Hardware Modules 124
3.2 Input and Output Signals 128
3.2.1 AC Input Signals 128
3.2.2 Binary Input, Output Signals 128
3.3 Automatic Supervision 130
3.3.1 Basic Concept of Supervision 130
3.3.2 Relay Monitoring 130
3.3.3 CT Failure Supervision 131
3.3.4 VT Failure Supervision 132
3.3.5 Trip Circuit Supervision 133
3.3.4 Circuit Breaker State Monitoring 134
3.3.5 Failure Alarms 134
3.3.6 Trip Blocking 135
3.3.7 Setting 135
3.4 Recording Function 136
3.4.1 Fault Recording 136
3.4.2 Alarm Recording 137
3.4.3 Event Recording 138
3.4.4 Disturbance Recording 138
3.5 Fault locator 141
3.5.1 Application 141
3.5.2 Distance to Fault Calculation 141
3.5.3 Starting Calculation 142
3.5.4 Displaying Location 142
3.5.5 Setting 143
4. User Interface 144
4.1 Outline of User Interface 144

⎯ 6⎯
6F2S0842
4.1.1 Front Panel 144
4.1.2 Communication Ports 147
4.2 Operation of the User Interface 148
4.2.1 LCD and LED Displays 148
4.2.2 Relay Menu 151
4.2.3 MIMIC Menu 155
4.2.3.1 Displaying MIMIC menu 155
4.2.3.2 Changing the MIMIC control mode 155
4.2.4 Displaying Records 156
4.2.4.1 Displaying Fault Records 156
4.2.4.2 Displaying Alarm Records 158
4.2.4.3 Displaying Event Records 159
4.2.4.4 Displaying Disturbance Records 159
4.2.4.5 Displaying Counters 160
4.2.4.6 Clear records 161
4.2.5 Displaying the Status 162
4.2.5.1 Displaying Metering Data 162
4.2.5.2 Displaying the Status of Measuring Relay Elements 164
4.2.5.3 Displaying the Status of Condition monitoring 166
4.2.5.4 Displaying the Status of Binary Inputs and Outputs 167
4.2.5.5 Displaying the Relay model information 168
4.2.6 Viewing and Changing the Settings 169
4.2.6.1 Setting Method 170
4.2.6.2 Protection 172
4.2.6.3 Setting the Control 212
4.2.6.4 Setting the Recording 216
4.2.6.5 Setting the Status 223
4.2.6.6 Setting the Time 227
4.2.6.7 Communication 228
4.2.6.8 Password 233
4.2.6.9 Panel 234
4.2.6.10 Others 235
4.2.7 Testing 236
4.2.7.1 Switch 237
4.2.7.2 Binary Output Relay 239
4.2.7.3 Logic circuit 240
4.3 Local Communication 241
4.4 Remote Communication 241
4.5 Clock Function 243
5. Installation 244
5.1 Receipt of Relays 244
5.2 Relay Mounting 244
5.3 Electrostatic Discharge 244
5.4 Handling Precautions 244

⎯ 7⎯
6F2S0842
5.5 External Connections 245
6. Commissioning and Maintenance 246
6.1 Outline of Commissioning Tests 246
6.2 Cautions 247
6.2.1 Safety Precautions 247
6.2.2 Cautions on Tests 247
6.3 Preparations 248
6.4 Hardware Tests 249
6.4.1 User Interfaces 249
6.4.2 Binary Input Circuit 250
6.4.3 Binary Output Circuit 250
6.4.4 AC Input Circuits 252
6.5 Function Test 253
6.5.1 Measuring Relay Element 253
6.5.2 Protection Scheme 269
6.5.3 Metering and Recording 269
6.6 Conjunctive Tests 270
6.6.1 On Load Test 270
6.6.2 Tripping, Reclosing and Control Circuit Test 271
6.7 Maintenance 273
6.7.1 Regular Testing 273
6.7.2 Failure Tracing and Repair 273
6.7.3 Replacing Failed Relay Unit 275
6.7.4 Resumption of Service 275
6.7.5 Storage 275
7. Putting Relay into Service 276

⎯ 8⎯
6F2S0842
Appendix A Programmable Reset Characteristics and Implementation of Thermal
Model to IEC60255-8 277
Appendix B Directional Earth Fault Protection and Power System Earthing 281
Appendix C Signal List 287
Appendix D LCD Message for Fault Record 321
Appendix E Details of Relay Menu and LCD & Button Operation 323
Appendix F Case Outline 333
Appendix G Typical External Connection 335
Appendix H Relay Setting Sheet 339
Appendix I Commissioning Test Sheet (sample) 381
Appendix J Return Repair Form 385
Appendix K Technical Data 391
Appendix L Symbols Used in Scheme Logic 401
Appendix M IEC60870-5-103: Interoperability 403
Appendix N Inverse Time Characteristics 417
Appendix O Ordering 423
The data given in this manual are subject to change without notice. (Ver.0.6)

⎯ 9⎯
6F2S0842
1. Introduction
GRD150 feeder manager relay is designed for protection, control, monitoring and metering of
medium voltage networks.
The GRD150 series provides the following protection functions.
•Non-directional and directional overcurrent and earth-fault protections
•Non-directional and directional sensitive earth fault protection (depending on the relay
models)
•Non-directional and directional negative phase sequence overcurrent protection
•Undercurrent protection
•Thermal overload protection
•Broken conductor detection
•Circuit breaker failure protection
•Cold load pick-up feature
•Overvoltage and undervoltage protection
•Zero phase sequence overvoltage protection
•Negative phase sequence overvoltage protection
•Frequency protection (over-/under-frequency and frequency rate-of-change)
•Autoreclose function (depending on the relay models)
The GRD150 series provides the following control functions.
•Indication of the status of switching devices, i.e. circuit breakers and disconnectors
•Open and close commands for switching devices
•Synchronism check function (depending on the relay models)
•MIMIC configuration picture
The GRD150 series provides the following monitoring and metering functions.
•Circuit breaker condition monitoring
•Trip circuit supervision
•Metering: three-phase currents and voltages, residual current and voltage, frequency, active
and reactive power, power factor, and max. demand values.
The GRD150 series provides the following recording function.
•Event record: 480 most recent events
•Alarm record: 32 most recent alarms
•Fault record: 8 most recent faults
•Disturbance record: 9 analog and 32 binary signals