Toshiba GR 200 Series User manual

6F2S1915 (Rev. 0.46)
Notice: GRZ200 manual is issued for ‘031’ and ‘032’
software code, which you can identify at ’S, G, and
T positions’ on Software nameplate.
GRZ200---
S, G, and T positions
TOSHIBA ENERGY SYSTEMS&SOLUTIONS CORPORATION
Instruction manual
Distance Protection IED
GR200 series (GRZ200)

6F2S1915 (0.46)
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Safety Precautions
Before using this equipment, please read this chapter carefully.
This chapter describes the safety precautions recommended when using the GR
equipment. 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 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 or property damage.
•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
CLASS 1 LASER PRODUCT.
DANGER
WARNING
DANGER
WARNING

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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 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.
•Modification
Do not modify this equipment, as this may cause the equipment to malfunction.
•Short-wire (Short-bar)
Do not remove the short-wire/short-bar(s) connected to the frame earth (FG) at the terminal
block on the rear of cases.
•Electric wire between #35 - #37 on the power-supply terminal block
Make sure the wire is connected.
(Exception: This wire needs to be detached for performing the dielectric voltage test.)

6F2S1915 (0.46)
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•Disposal
This equipment contains neither expendable supplies nor parts that can be recycled. When
disposing of this equipment, the customer must contact an operator responsible for
industrial waste disposal, and request that the operator dispose of this equipment in
accordance with the local waste disposal regulations; otherwise the person who disposes
of this equipment may be punished under local regulations. When disposing of this
equipment is practiced by the customer acting on their own behalf, it must be done so in a
safe manner according to local regulations. For further information in terms of the disposal,
the customer shall contact to a local dealer and sales staff at Toshiba Energy Systems &
Solutions Corporation (Toshiba ESS, Japan).
This equipment contains neither expendable supplies nor recyclables.
•Plastics material
This equipment contains the following plastics material.
- ABS, Polycarbonate, Acrylic resins, Nylon 66, and others.
Equipment installation and operation
•Equipment installation
Never remove cables at frame ground terminals (FGs) while the AC/DC power supplies.
•Equipment operation
The user shall have responsibilities to use and install the equipment where the
specifications are designated by the manufacture. Never operate the equipment on the
condition where the manufacture cannot intend. Otherwise, the safety function furnished
into the equipment may not be operated properly.
•Symbols
Symbol
Description
Protective conductor terminal
Caution, risk of electric shock

6F2S1915 (0.46)
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Liability, copyright and others
•Disclaimer of liability
We have checked the description of this manual against the hardware and software
described, but we cannot guarantee that all deviations have been eliminated from the
description completely; hence, no liability can be accepted for any errors or omissions
contained in the information given. We review the information in this manual regularly
and there will be some corrections in subsequent editions. We reserve the right to make
technical improvements without notice.
•Copyright
© Toshiba Energy Systems & Solutions Corporation 2021.
All rights reserved.
•Registered Trademarks
Product/Equipment names (mentioned herein) may be trademarks of their respective
companies.

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Contents
1Introduction ......................................................................................................................................... 1
Protection functions...................................................................................................................... 2
1.1.1 Purposes of the protection..................................................................................................... 2
1.1.2 Requirements in the protection functions ............................................................................ 2
1.1.3 Behavior of backup protections............................................................................................. 4
1.1.4 Concepts of current differential protection (DIF) function.................................................. 6
1.1.5 Concepts of distance protection (ZS/ZG) function ................................................................ 6
1.1.6 Concepts of carrier command protection (DISCAR/DEFCAR) function ........................... 10
1.1.7 Tripping CB by the protection functions.............................................................................. 10
1.1.8 Autoreclosing CB (ARC) after the operation of the protection functions...........................11
1.1.9 Conventional applications....................................................................................................11
Control......................................................................................................................................... 12
1.2.1 General control function...................................................................................................... 12
1.2.2 Control and monitoring application.................................................................................... 12
Monitoring and metering functions ........................................................................................... 13
Hardware overview..................................................................................................................... 14
Symbols used in logical diagrams .............................................................................................. 15
Abbreviation................................................................................................................................ 19
Function Block (FB), Function ID, Signal number (Data ID) .................................................. 21
2Relay application ............................................................................................................................... 23
Distance protection (ZS/ZG) ....................................................................................................... 24
2.1.1 Principle of distance measurement .................................................................................... 25
2.1.2 Equations in distance protection function.......................................................................... 29
2.1.3 Element characteristic in distance relay............................................................................ 36
2.1.4 Common application for ZS and ZG.................................................................................... 50
2.1.5 Extended application........................................................................................................... 58
2.1.6 Command protection feature .............................................................................................. 60
2.1.7 Scheme logic ........................................................................................................................ 65
2.1.8 Tips to set the main/remote backup relays ........................................................................ 81
2.1.9 Tips to set the distance zones for multi-terminal lines...................................................... 85
2.1.10 ZS/ZG test ............................................................................................................................ 87
2.1.11 Setting.................................................................................................................................. 88
2.1.12 Data ID .............................................................................................................................. 104
Switch on to fault (SOTF-OC)...................................................................................................117
2.2.1 Scheme logic .......................................................................................................................118
2.2.2 Setting................................................................................................................................ 120
2.2.3 Data ID .............................................................................................................................. 120
Distance carrier command protection (DISCAR).................................................................... 121

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2.3.1 Permissive underreach protection (PUP) ......................................................................... 122
2.3.2 Permissive overreach protection (POP)............................................................................ 123
2.3.3 Unblocking overreach protection (UOP)........................................................................... 126
2.3.4 Blocking overreach protection (BOP) ............................................................................... 128
2.3.5 Protection for week infeed terminal ................................................................................. 131
2.3.6 Countermeasure for current reversal............................................................................... 133
2.3.7 Carrier signal reception .................................................................................................... 135
2.3.8 Setting................................................................................................................................ 137
2.3.9 Data ID .............................................................................................................................. 138
Directional earth fault command protection (DEFCAR) ........................................................ 140
2.4.1 Permissive overreach protection (POP)............................................................................ 141
2.4.2 Unblocking overreach protection (UOP)........................................................................... 144
2.4.3 Blocking overreach protection (BOP) ............................................................................... 144
2.4.4 Coordination with DISCAR protection............................................................................. 146
2.4.5 Carrier signal reception .................................................................................................... 147
2.4.6 Setting................................................................................................................................ 149
2.4.7 Data ID .............................................................................................................................. 150
Overcurrent protection (OC) .................................................................................................... 152
2.5.1 Relay polarity .................................................................................................................... 153
2.5.2 Inverse time and definite time delay characteristic ........................................................ 156
2.5.3 Threshold value for operation........................................................................................... 163
2.5.4 Reset Ratio......................................................................................................................... 163
2.5.5 Miscellaneous functions .................................................................................................... 163
2.5.6 Scheme logic ...................................................................................................................... 165
2.5.7 Setting................................................................................................................................ 167
2.5.8 Data ID .............................................................................................................................. 172
Earth fault protection (EF) ...................................................................................................... 175
2.6.1 Relay polarity .................................................................................................................... 176
2.6.2 Inverse time and definite time delay characteristic ........................................................ 178
2.6.3 Threshold level for operation ............................................................................................ 183
2.6.4 Reset Ratio......................................................................................................................... 183
2.6.5 Miscellaneous functions .................................................................................................... 183
2.6.6 Scheme logic ...................................................................................................................... 184
2.6.7 Setting................................................................................................................................ 186
2.6.8 Data ID .............................................................................................................................. 191
Negative sequence overcurrent protection (OCN)................................................................... 193
2.7.1 Relay polarity .................................................................................................................... 194
2.7.2 Inverse time and definite time delay characteristic ........................................................ 196
2.7.3 Threshold value ................................................................................................................. 201

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2.7.4 Reset Ratio......................................................................................................................... 201
2.7.5 Miscellaneous functions .................................................................................................... 201
2.7.6 Scheme logic ...................................................................................................................... 202
2.7.7 Setting................................................................................................................................ 204
2.7.8 Data ID .............................................................................................................................. 209
Thermal overload function (THM)............................................................................................211
2.8.1 Thermal state determination............................................................................................ 212
2.8.2 Thermal characteristic...................................................................................................... 213
2.8.3 Scheme logic ...................................................................................................................... 214
2.8.4 Setting................................................................................................................................ 215
2.8.5 Data ID .............................................................................................................................. 216
Broken conductor protection (BCD)......................................................................................... 217
2.9.1 Equivalent circuit for a one-phase series fault ................................................................ 218
2.9.2 Characteristic and setting................................................................................................. 220
2.9.3 Miscellaneous functions .................................................................................................... 220
2.9.4 Scheme logic ...................................................................................................................... 221
2.9.5 Setting................................................................................................................................ 221
2.9.6 Data ID .............................................................................................................................. 222
Circuit breaker fail protection (CBF)....................................................................................... 223
2.10.1 CBF operation and its elements ....................................................................................... 224
2.10.2 Re-trip feature ................................................................................................................... 224
2.10.3 Backup feature .................................................................................................................. 225
2.10.4 Scheme logic ...................................................................................................................... 227
2.10.5 Operation timing ............................................................................................................... 229
2.10.6 Setting................................................................................................................................ 230
2.10.7 Data ID .............................................................................................................................. 231
Stub protection with overcurrent relay (STUB-OC) ............................................................... 233
2.11.1 Stub-OC characteristic...................................................................................................... 234
2.11.2 Scheme logic ...................................................................................................................... 234
2.11.3 Setting................................................................................................................................ 236
2.11.4 Data ID .............................................................................................................................. 237
Overvoltage protection for phase-to-neutral (OV)................................................................... 238
2.12.1 Drop-off and pickup characteristic ................................................................................... 239
2.12.2 Delay for the operation of the OV element....................................................................... 239
2.12.3 Time characteristic............................................................................................................ 239
2.12.4 Miscellaneous functions .................................................................................................... 242
2.12.5 Scheme logic ...................................................................................................................... 242
2.12.6 Setting list ......................................................................................................................... 244
2.12.7 Data ID .............................................................................................................................. 245

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Overvoltage protection for phase-to-phase (OVS)................................................................... 246
2.13.1 Drop-off and pickup setting............................................................................................... 247
2.13.2 Delay for the operation of the OVS element .................................................................... 247
2.13.3 Time characteristic............................................................................................................ 247
2.13.4 Miscellaneous functions .................................................................................................... 249
2.13.5 Scheme logic ...................................................................................................................... 250
2.13.6 Setting list ......................................................................................................................... 251
2.13.7 Data ID .............................................................................................................................. 252
Earth fault overvoltage protection (OVG) ............................................................................... 253
2.14.1 Drop-off and pickup setting............................................................................................... 254
2.14.2 Delay of the operation of the OVG element...................................................................... 254
2.14.3 Time characteristic............................................................................................................ 254
2.14.4 Miscellaneous functions .................................................................................................... 257
2.14.5 Scheme logic ...................................................................................................................... 257
2.14.6 Setting................................................................................................................................ 259
2.14.7 Data ID .............................................................................................................................. 260
Phase under-voltage protection (UV)....................................................................................... 261
2.15.1 Drop-off and pick-up characteristic .................................................................................. 262
2.15.2 Time characteristic............................................................................................................ 262
2.15.3 Miscellaneous functions .................................................................................................... 265
2.15.4 Scheme logic ...................................................................................................................... 265
2.15.5 Setting................................................................................................................................ 267
2.15.6 Data ID .............................................................................................................................. 268
Phase-to-phase under-voltage protection (UVS) ..................................................................... 269
2.16.1 Drop-off and pick-up characteristic .................................................................................. 270
2.16.2 Time characteristic............................................................................................................ 270
2.16.3 Miscellaneous functions .................................................................................................... 273
2.16.4 Scheme logic ...................................................................................................................... 273
2.16.5 Setting................................................................................................................................ 275
2.16.6 Data ID .............................................................................................................................. 276
Frequency protection (FRQ/DFRQ) ......................................................................................... 278
2.17.1 FRQ features and characteristics ..................................................................................... 279
2.17.2 DFRQ features and characteristics .................................................................................. 281
2.17.3 Setting................................................................................................................................ 283
2.17.4 Data ID .............................................................................................................................. 285
Out of step tripping protection by distance relay (OSTZ)....................................................... 288
2.18.1 Phenomenon and principle of out-of-step......................................................................... 289
2.18.2 Function features .............................................................................................................. 290
2.18.3 Operation zones and element characteristics .................................................................. 290

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2.18.4 Scheme logic and setting................................................................................................... 292
2.18.5 Setting................................................................................................................................ 294
2.18.6 Data ID .............................................................................................................................. 295
Inrush current detection function (ICD).................................................................................. 296
2.19.1 Operation and characteristic ............................................................................................ 297
2.19.2 Scheme logic ...................................................................................................................... 297
2.19.3 Setting................................................................................................................................ 298
2.19.4 Data ID .............................................................................................................................. 298
Fail safe (FS)............................................................................................................................. 299
2.20.1 Overcurrent element (OCFS)............................................................................................ 300
2.20.2 Phase current change detector element (OCDFS) ........................................................... 300
2.20.3 Earth fault current element (EFFS)................................................................................. 300
2.20.4 Multi-level overcurrent elements (OCMFS)..................................................................... 301
2.20.5 Under-voltage element for phase-to-earth (UVFS).......................................................... 302
2.20.6 Under-voltage element for phase-to-phase (UVSFS)....................................................... 302
2.20.7 Under-voltage change detection element (DUVFS) ......................................................... 302
2.20.8 Scheme logic ...................................................................................................................... 303
2.20.9 Setting................................................................................................................................ 305
2.20.10 Data ID list..................................................................................................................... 306
VT failure detection (VTF) ....................................................................................................... 307
2.21.1 VTF features...................................................................................................................... 308
2.21.2 Operation for the VTF function ........................................................................................ 308
2.21.3 VTF Logic........................................................................................................................... 309
2.21.4 Setting.................................................................................................................................311
2.21.5 Data ID .............................................................................................................................. 312
CT failure detection (CTF) ....................................................................................................... 313
2.22.1 CTF features...................................................................................................................... 314
2.22.2 Operation for the CTF function ........................................................................................ 314
2.22.3 Scheme logic ...................................................................................................................... 314
2.22.4 Setting................................................................................................................................ 316
2.22.5 Data ID .............................................................................................................................. 317
Single-end fault locator (FL-Z)................................................................................................. 318
2.23.1 Computation method......................................................................................................... 319
2.23.2 Output of FL computation on display............................................................................... 322
2.23.3 Setting and operation........................................................................................................ 323
2.23.4 Setting................................................................................................................................ 331
2.23.5 Data ID .............................................................................................................................. 333
Autoreclose (ARC)..................................................................................................................... 334
2.24.1 Outline ............................................................................................................................... 335