Protection Functions
PRS-7367 157
VOL_SEL
U3P
Sel2
BothAct
VoltageLoss
Invalid
CB_Open1
CB_Close1
CB_Open2
CB_Close2
Sel1
BIErr
Figure 3.31-1 Function block
3.31.1.2 Signals
Table 3.31-1 Input Signals
The voltage magnitude in all the three phases
The open position of Bus1 and Bus2 or Line1 and Line2
disconnections.
The close position of Bus1 and Bus2 or Line1 and Line2
disconnectors.
Table 3.31-2 Output Signals
It means the Bus1 or Line1 voltage is valid
It means the Bus2 or Line2 voltage is valid.
It means both Bus1 and Bus2 voltage, or both Line1 and
Line2 voltage are valid, and Bus1 or Line1 voltage will be
selected.
It means neither Bus1 nor Bus2 voltage, or neither Line1
nor Line2 voltage transformer fuse failed.
It means the position is invalid.
It means the position of CBs are error.
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