Toshiba GR-200 Series Instruction Manual page 9

Overvoltage protection for phase-to-phase (OVS) ................................................................... 177
Drop-off and pickup setting............................................................................................... 178
2.16.1
Delay for the operation of the OVS element .................................................................... 178
2.16.2
Time characteristic ............................................................................................................ 178
2.16.3
Miscellaneous functions .................................................................................................... 180
2.16.4
Scheme logic ...................................................................................................................... 181
2.16.5
Setting ................................................................................................................................ 183
2.16.6
Signal ................................................................................................................................. 185
2.16.7
Earth fault overvoltage protection (OVG) ............................................................................... 187
Drop-off and pickup setting............................................................................................... 188
2.17.1
Delay of the operation of the OVG element ...................................................................... 188
2.17.2
Time characteristic ............................................................................................................ 188
2.17.3
Miscellaneous functions .................................................................................................... 190
2.17.4
Scheme logic ...................................................................................................................... 191
2.17.5
Setting ................................................................................................................................ 193
2.17.6
Signal ................................................................................................................................. 195
2.17.7
Negative sequence overvoltage protection (OVN) ................................................................... 196
Drop-off and pickup setting............................................................................................... 197
2.18.1
Delay of the operation of the OVN element ..................................................................... 197
2.18.2
Time characteristic ............................................................................................................ 197
2.18.3
Miscellaneous functions .................................................................................................... 199
2.18.4
Scheme logic ...................................................................................................................... 200
2.18.5
Application ......................................................................................................................... 201
2.18.6
Setting ................................................................................................................................ 202
2.18.7
Signal ................................................................................................................................. 204
2.18.8
Frequency protection with 8 stages (FRQ/DFRQ) .................................................................. 205
FRQ features and characteristics ..................................................................................... 206
2.19.1
DFRQ features and characteristics .................................................................................. 209
2.19.2
Rapid change detector ........................................................................................................ 211
2.19.3
Setting ................................................................................................................................ 216
2.19.4
Signal ................................................................................................................................. 218
2.19.5
VT failure detection (VTF) ....................................................................................................... 222
VTF features ...................................................................................................................... 223
2.20.1
Operation for the VTF function ........................................................................................ 223
2.20.2
Scheme Logic ..................................................................................................................... 224
2.20.3
Setting ................................................................................................................................ 226
2.20.4
Signal ................................................................................................................................. 227
2.20.5
CT failure detection (CTF) ....................................................................................................... 228
CTF features ...................................................................................................................... 229
2.21.1
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6F2T0200 (0.15)