Figure 3.34-16 Diagram of the operation process of BPAS3
The operation processes of BPAS3 and BPAS4 are similar, so take BPAS3 for example.
After BPAS3 is completed charged, if the line voltage of busbar 1 is less than
Bus_Dead_Vol, current of operating incoming line 1 is less than L1_Live_Cur, and the line voltage
of busbar 2 is more than Bus_Live_Vol, backup power automatic switching device will send “BPAS
Trip CB01” signal and transmit CB01 tripping pulse after CB01_Trip_T. The backup power
automatic switching device will intertrip the load of busbar 1 meanwhile if Intertrip_Ena is “Enable”.
Once CB01 fails to operate within 5s after the release of “BPAS Trip CB01” signal, terminate
BPAS3 logic and discharge BPAS3, and then the device would send “BPAS trip CB fail” signal;
Countermand CB01 tripping command after CB01 is confirmed have tripped off. Backup
power automatic switching device will transmit CB03 closing pulse and send “BPAS Close CB03”
signal after CB03_Close_T;
Countermand “BPAS Close CB03” signal and send “BPAS success” after CB03 is
confirmed to have been closed. Once CB03 fails to operate within 5s after the release of “BPAS
Close CB03” signal, terminate logic and discharge BPAS3, and then the device would give “BPAS
Close CB fail” signal.
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