Poc Logic; Figure 202: Phase Overcurrent Protection Logic Diagram - GE MiCOM P40 Technical Manual

Chapter 13 - Current Protection Functions
2.3

POC LOGIC

IA
I>1 Current Set
VBC
I>1 Direction
VTS Fast Block
I> Blocking
VTS Blocks I>1
IB
I>1 Current Set
VCA
I>1 Direction
VTS Fast Block
I> Blocking
VTS Blocks I>1
IC
I>1 Current Set
VAB
I>1 Direction
VTS Fast Block
I> Blocking
VTS Blocks I>1
I>1 Timer Block
V00735

Figure 202: Phase Overcurrent Protection logic diagram

362
Directional
check
832
&
Directional
check
832
&
Directional
check
832
&
401
& &
Timer Settings
& &
Timer Settings
& &
Timer Settings
Note: For the purpose of clarity , this diagram shows the first
relevant stage number for each signal and setting name .
P446SV
762
I>1 Start A
656
I>1 Trip A
763
I>1 Start B
657
I>1 Trip B
764
I>1 Start C
658
I >1 Trip C
761
1
I>1 Start
655
1
I>1 Trip
P446SV-TM-EN-1