GE MiCOM P40 Agile - Page 224

Cyclic criteria are such that the priorities of the phases are always compared cyclically. For example, C(A) Cyclic
logic means: phase C is higher priority than phase A, phase A is higher priority than phase B, but in this case phase
B priority is higher than phase C.
The definitions of all acyclic and cyclic combinations are listed in the following table:
Criterion Priority Convergent loops Selected phase
A(B) acyclic A before B, B before C
AN, BN
BN, CN
CN, AN
AN, BN, CN
AN
BN
AN
AN
B(A) acyclic B before A, A before C
AN, BN
BN, CN
CN, AN
AN, BN, CN
BN
BN
AN
BN
A(C) acyclic A before C, C before B
AN, BN
BN, CN
CN, AN
AN, BN, CN
AN
CN
AN
AN
C(A) acyclic C before A, A before B
AN, BN
BN, CN
CN, AN
AN, BN, CN
AN
CN
CN
CN
B(C) acyclic B before C, C before A
AN, BN
BN, CN
CN, AN
AN, BN, CN
BN
BN
CN
BN
C(B) acyclic C before B, B before A
AN, BN
BN, CN
CN, AN
AN, BN, CN
BN
CN
CN
CN
A(C) cyclic A before C, C before B, B before A
AN, BN
BN, CN
CN, AN
AN, BN, CN
BN
CN
AN
AN
C(A) cyclic C before A, A before B, B before C
AN, BN
BN, CN
CN, AN
AN, BN, CN
AN
BN
CN
CN
You can set the phase preference with the
Phase prio. 2pG setting in the SCHEME LOGIC column.
Chapter 7 - Distance Protection P543i/P545i
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