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7UM62 Manual
C53000-G1176-C149-3
1402 Ip
IL1
1402 Ip
IL2
1402 Ip
IL3
UL1
Loop
UL2
release
UL3
Fuse Failure
FNr. 000361
>FAIL:Feeder VT
FNo. 01883
>BLOCK O/C Ip
Figure 2-18
Logic Diagram of the Voltage-Controlled Inverse O/C Time Protection
The changeover to the lower current pick-up value in case of decreasing voltage (loop
release) is performed on a phase by phase basis according to table 2-5.
Inverse-Time Overcurrent Protection (ANSI 51V)
FNo. 01899
O/C Ip pick.up
OR
FNo. 01896
O/C Ip Fault L1
1403 T Ip
&
FNo. 01897
O/C Ip Fault L2
1403 T Ip
&
FNo. 01898
O/C Ip Fault L3
1403 T Ip
&
OR
FNo. 01892
O/C Ip BLOCKED
FNo. 01900
Tripping
O/C Ip TRIP
matrix
OR
TMin
TRIP CMD
51
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