Alstom MiCOM P54 Series - Page 179

Operation P54x/EN OP/La4
MiCOM P543, P544, P545 & P546 (OP) 5-5
OP
3.2 Current transformer supervision 127
3.2.1 Differential CTS (no need of local voltage measurements to declare CTS) 127
3.2.2 Standard CTS (voltage dependant CTS no need of communications to declare CTS) 128
3.2.3 CTS blocking 129
3.3 Transformer magnetizing inrush detector 129
3.4 Function keys 129
3.5 Setting groups selection 130
3.6 Control inputs 131
3.7 Real time clock synchronization via opto-inputs 132
3.8 Fault locator 132
3.8.1 Basic theory for ground faults 133
3.8.2 Data acquisition and buffer processing 133
3.8.3 Faulted phase selection 133
3.8.4 The fault location calculation 133
3.8.5 Obtaining the vectors 134
3.8.6 Solving the equation for the fault location 134
3.8.7 Mutual compensation 135
4. SINGLE CIRCUIT BREAKER CONTROL : P543/P545 OPERATIONAL
DESCRIPTION 136
4.1 Single and three phase auto-reclosing 136
4.1.1 Time delayed and high speed auto-reclosing 136
4.1.2 Auto-reclose logic inputs (P543/P545) 136
4.1.2.1 CB healthy (P543/P545) 136
4.1.2.2 BAR (P543/P545) 136
4.1.2.3 Reset lockout (P543/P545) 136
4.1.2.4 Pole discrepancy (P543/P545) 137
4.1.2.5 Enable 1 pole AR (P543/P545) 137
4.1.2.6 Enable 3 pole AR(P543/P545) 137
4.1.2.7 External trip (P543/P545) 137
4.1.3 Internal signals (P543/P545) 137
4.1.3.1 Trip initiate signals (P543/P545) 137
4.1.3.2 Circuit breaker status (P543/P545) 137
4.1.3.3 Check synch ok and system check ok (P543/P545) 137
4.1.4 Auto-reclose logic outputs (P543/P545) 138
4.1.4.1 AR 1 pole in progress (P543/P545) 138
4.1.4.2 AR 3 pole in progress (P543/P545) 138
4.1.4.3 Successful close (P543/P545) 138
4.1.4.4 AR status (P543/P545) 138
4.1.4.5 Auto close (P543/P545) 138
4.1.5 Auto-reclose alarms (P543/P545) 138
4.1.5.1 AR No checksync (latched) (P543/P545) 138