Figure 3.34-6 Diagram of the discharge condition of BPAS1
The discharge conditions of BPAS1 and BPAS2 are similar, so take BPAS1 for example.
Discharge conditions normally cover the following items. Backup power automatic switching
would be discharged immediately after any discharge condition is satisfied.
1) Blocking condition is satisfied. Backup power automatic switching is forcibly blocked,
regardless of whether it has been started;
2) Backup power automatic switching is disabled, that means the setting value BPAS1_Ena
is set to “Disabled”, or the binary input BPAS_Ena is “Disable”;
3) The binary input CB01_Aft_Cls or CB03_Aft_Cls disappears when setting value
CB_Aft_Cls_Ena is set to “Enable”;
4) Operation breakers are in error status, that means the current at one phase of incoming
line of operational power supply is more than incoming line no-current setting value, although the
operation breakers are open. The logic diagram of CB position error is shown in Figure 3.34-7;
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