Alstom MiCOM P546 - Page 202

P54x/EN OP/La4 Operation
(OP) 5-28 MiCOM P543, P544, P545 & P546
OP
DDB CB Open C ph (906)
DDB CB Open B ph (905)
INTSIG Phase A Undercurrent Operation
t
0
20ms
&
1
t
0
20ms
&
1
t
0
20ms
&
1
INTSIG Phase A Undervoltage Operation
DDB CB Open A ph (904)
INTSIG Phase B Undercurrent Operation
INTSIG Phase C Undercurrent Operation
DDB CB Open 3 ph (903)
&
1
DDB Pole Dead C (894)
DDB Any Pole Dead (891)
DDB All Poles Dead (890)
DDB Pole Dead B (893)
DDB Pole Dead A (892)
INTSIG VTS Slow Block
P1112ENd
INTSIG Phase B Undervoltage Operation
INTSIG Phase C Undervoltage Operation
&
&
&
&
Figure 13 Pole dead logic for P543/P545