ABB RELION REX640 Technical Manual page 877

1MRS759142 C
REX640
Technical Manual
Table 835: Conversion from element start to monitored data signals
Start of element START_GFC
I > & U < & TRUE
A A
EARTH_FLT |
I >> &
A
EARTH_FLT
I > & U < & TRUE
B B
EARTH_FLT |
I >> &
B
EARTH_FLT
I > & U < & TRUE
C C
EARTH_FLT |
I >> &
C
EARTH_FLT
I > & I > & U < | TRUE
A B AB
I >> & I >>
A B
I > & I > & U < | TRUE
B C BC
I >> & I >>
B C
I > & I > & U < | TRUE
C A CA
I >> & I >>
C A
I > & I > & U < & TRUE
A B AB
EARTH_FLT |
I >> & I >> &
A B
EARTH_FLT
I > & I > & U < TRUE
B C BC
& EARTH_FLT |
I >>I >> &
B C
EARTH_FLT
I > & I > & U < TRUE
C A CA
& EARTH_FLT |
I >>I >> &
C A
EARTH_FLT
I > & I > & I & TRUE
A B C
U < & U <
AB BC
U < |
CA
I >>, I >> & I
A B C
1)
>>
I > & I > & I & TRUE
A B C
U < & U <
AB BC
U < &
CA
EARTH_FLT |
I >>, I >> & I >>
A B C
2)
& EARTH_FLT
1) This applies to near three-phase faults. If voltages are still relatively high, all PP releases are given.
2) This applies to near three-phase faults with EF indication. If voltages are still relatively high, all PE and
PP releases (except ABC Fault) are given.
Ix> Phase current exceeds the
Ix>> Phase current exceeds the
Ux< Phase voltage undershoots the
Uxy< Phase-to-phase voltage undershoots the
STARTS_GFC RELEASE PE
AG Fault AG Fault
BG Fault BG Fault
CG Fault CG Fault
AB Fault No fault
BC Fault No fault
CA Fault No fault
AB Fault AB Fault
BC Fault BC Fault
CA Fault CA Fault
ABC Fault No fault
ABC Fault No fault
Lo A Ph Sel GFC setting
Str A Ph Sel GFC setting
Ph V Ph Sel GFC setting
PP V Ph Sel GFC setting
Section 4
Protection functions
RELEASE PP
No fault
No fault
No fault
AB Fault
BC Fault
CA Fault
AB Fault
BC Fault
CA Fault
ABC Fault
ABC Fault
871