5.4.3 Regulator synchronisation parameters................................................................................................................................................................159
5.5 Synchronisation and breaker alarms.........................................................................................................................................................................160
5.5.1 Breaker synchronisation failure...............................................................................................................................................................................160
5.5.2 De-load failure................................................................................................................................................................................................................ 161
5.5.3 Vector mismatch............................................................................................................................................................................................................162
5.5.4 Breaker opening failure.............................................................................................................................................................................................. 162
5.5.5 Breaker closing failure................................................................................................................................................................................................ 163
5.5.6 Breaker position failure...............................................................................................................................................................................................163
5.5.7 Breaker trip (external)................................................................................................................................................................................................. 164
5.5.8 Breaker short circuit.....................................................................................................................................................................................................164
5.5.9 Phase sequence error.................................................................................................................................................................................................165
5.5.10 Breaker configuration failure..................................................................................................................................................................................166
5.5.11 Any tie breaker position failure..............................................................................................................................................................................166
5.5.12 Any bus tie breaker position failure.....................................................................................................................................................................167
6. Regulation
6.1 Introduction..............................................................................................................................................................................................................................168
6.1.1 Overview...........................................................................................................................................................................................................................168
6.1.2 Analogue regulation.....................................................................................................................................................................................................168
6.1.3 Relay regulation.............................................................................................................................................................................................................171
6.1.4 Regulation mode overview........................................................................................................................................................................................173
6.2 Governor regulation modes............................................................................................................................................................................................175
6.2.1 Overview...........................................................................................................................................................................................................................175
6.2.2 Frequency regulation...................................................................................................................................................................................................175
6.2.3 Frequency synchronisation.......................................................................................................................................................................................176
6.2.4 Phase synchronisation................................................................................................................................................................................................176
6.2.5 Power regulation........................................................................................................................................................................................................... 176
6.2.6 Power load sharing.......................................................................................................................................................................................................177
6.2.7 Governor stand-alone mode.....................................................................................................................................................................................178
6.3 AVR regulation modes....................................................................................................................................................................................................... 180
6.3.1 Overview...........................................................................................................................................................................................................................180
6.3.2 Voltage regulation......................................................................................................................................................................................................... 180
6.3.3 Reactive power regulation.........................................................................................................................................................................................181
6.3.4 Reactive power load sharing....................................................................................................................................................................................182
6.3.5 AVR stand-alone mode...............................................................................................................................................................................................183
6.4 External communication...................................................................................................................................................................................................185
6.4.1 Overview...........................................................................................................................................................................................................................185
6.4.2 External communication using an analogue input.......................................................................................................................................... 185
6.4.3 External communication using Modbus...............................................................................................................................................................188
6.5 Governor....................................................................................................................................................................................................................................190
6.5.1 Governor regulation function....................................................................................................................................................................................190
6.5.2 Governor analogue regulation function............................................................................................................................................................... 192
6.5.3 Governor relay regulation function........................................................................................................................................................................ 194
6.6 Automatic voltage regulator........................................................................................................................................................................................... 196
6.6.1 AVR regulator................................................................................................................................................................................................................. 196
6.6.2 AVR analogue regulation function..........................................................................................................................................................................198
6.6.3 AVR relay regulation parameters........................................................................................................................................................................... 200
6.7 Configuration alarms.......................................................................................................................................................................................................... 201
6.7.1 GOV relay setup incomplete.................................................................................................................................................................................... 201
DESIGNER'S HANDBOOK 4189340911K UK Page 6 of 521
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