ABB RELION REX640 Technical Manual page 959

1MRS759142 F
Table 915: Supported phase preference logic schemes for high-impedance earthed networks and
their operation in case of single phase start with and without cross-country fault detection
Ph Prf mode Hi Z GFC
1 No filter
2 No preference
3 Cyc A-B-C-A
4 Cyc A-C-B-A
5 Acyc A-B-C
6 Acyc A-C-B
7 Acyc B-A-C
8 Acyc B-C-A
9 Acyc C-A-B
10 Acyc C-B-A
Table 916: Supported phase preference logic schemes for high-impedance earthed networks and
their operation in case of two phase starts without cross-country fault detection
Ph Prf mode Hi Z GFC
1 No filter
2 No preference
3 Cyc A-B-C-A
4 Cyc A-C-B-A
5 Acyc A-B-C
6 Acyc A-C-B
7 Acyc B-A-C
8 Acyc B-C-A
9 Acyc C-A-B
10 Acyc C-B-A
Table 917: Supported phase preference logic schemes for high-impedance earthed networks and
their operation in case of two phase starts with cross-country fault detection
Ph Pref logic Hi Imp
1 No filter
2 No preference
3 Cyc A-B-C-A
4 Cyc A-C-B-A
5 Acyc A-B-C
6 Acyc A-C-B
7 Acyc B-A-C
Table continues on the next page
REX640
Technical Manual
"No filter" option does not block the single-phase earth-faults, therefore
this option should be used with caution.
A & B &
EARTH_FLT EARTH_FLT
RELEASE_PE
AG Fault BG Fault
No fault No fault
No fault No fault
No fault No fault
No fault No fault
No fault No fault
No fault No fault
No fault No fault
No fault No fault
No fault No fault
A & B B & C
EARTH_FLT EARTH_FLT
RELEASE_PE
AB Fault BC Fault
No fault No fault
No fault No fault
No fault No fault
No fault No fault
No fault No fault
No fault No fault
No fault No fault
No fault No fault
No fault No fault
A & B XC_FLT B & C XC_FLT
RELEASE_PE
AB Fault BC Fault
AB Fault BC Fault
AB Fault BC Fault
AB Fault BC Fault
AB Fault BC Fault
AB Fault BC Fault
AB Fault BC Fault
Faulted loops
C & A & XC_FLT
EARTH_FLT
RELEASE_PP
CG Fault AG Fault
No fault AG Fault
No fault AG Fault
No fault AG Fault
No fault AG Fault
No fault AG Fault
No fault AG Fault
No fault AG Fault
No fault AG Fault
No fault AG Fault
Faulted loops
C & A A & B
EARTH_FLT EARTH_FLT
RELEASE_PP
CA Fault AB Fault
No fault AB Fault
No fault AB Fault
No fault AB Fault
No fault AB Fault
No fault AB Fault
No fault AB Fault
No fault AB Fault
No fault AB Fault
No fault AB Fault
Faulted loops
C & A XC_FLT A & B XC_FLT
RELEASE_PP
CA Fault AB Fault
CA Fault AB Fault
CA Fault AB Fault
CA Fault AB Fault
CA Fault AB Fault
CA Fault AB Fault
CA Fault AB Fault
Protection functions
B & XC_FLT C & XC_FLT
BG Fault CG Fault
BG Fault CG Fault
BG Fault CG Fault
BG Fault CG Fault
BG Fault CG Fault
BG Fault CG Fault
BG Fault CG Fault
BG Fault CG Fault
BG Fault CG Fault
BG Fault CG Fault
B & C C & A
EARTH_FLT EARTH_FLT
BC Fault CA Fault
BC Fault CA Fault
BC Fault CA Fault
BC Fault CA Fault
BC Fault CA Fault
BC Fault CA Fault
BC Fault CA Fault
BC Fault CA Fault
BC Fault CA Fault
BC Fault CA Fault
B & C XC_FLT C & A XC_FLT
BC Fault CA Fault
BC Fault CA Fault
BC Fault CA Fault
BC Fault CA Fault
BC Fault CA Fault
BC Fault CA Fault
BC Fault CA Fault
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