ABB RELION REX640 Technical Manual page 884

Section 4
Protection functions
Table 837: 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 838: 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 839: 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
Table continues on next page
878
Faulted loops
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
Faulted loops
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
Faulted loops
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
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
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
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
1MRS759142 C
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
REX640
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