Figure 3.34-7 Diagram of CB position error logic
5) The time period during which backup power supply doesn’t meet live voltage condition is
longer than 15s;
6) Backup breaker is not in backup status, that means backup breaker has been closed;
7) Operating breaker fails to trip or backup breaker fails to close;
Charge Conditions
The logic diagrams of the charge condition of BPAS1 is shown in Figure 3.34-8.
Figure 3.34-8 Diagram of the charge condition of BPAS1
The charge conditions of BPAS1 and BPAS2 are similar, so take BPAS1 for example.
The charge conditions of BPAS1 cover the following items:
1) No blocking condition, discharge condition;
To Next Page