ABB REF611 User Manual

LED 2
EARTH-FAULT PROTECTION
DOUBLE (CROSS-COUNTRY) EARTH-FAULT PROTECTION
DIRECTIONAL EARTH-FAULT PROTECTION
INTERMITTENT EARTH-FAULT PROTECTION
DEFLPDEF1
Io>->(1)
67N-1(1)
BLOCK
START
OPERATE
Io
ENA_MULT
Uo
RCA_CTL
DEFLPDEF2
Io>->(2)
67N-1(2)
BLOCK
START
OPERATE
Io
ENA_MULT
Uo
RCA_CTL
DEFHPDEF1
Io>>->(1)
67N-2(1)
BLOCK
START
OPERATEIo
ENA_MULT
Uo
RCA_CTL
OSWGAPC9
OR
OUT
IN_5
IN_6
IN_7
IN_8
IN_12
SELGAPC4
OUT_2
IN_11
INTRPTEF1
Io>->IEF(1)
67NIEF(1)
START
OPERATE
BLK_EF
BLOCK
Io
Uo
EFHPTOC1
Io>>(1)
51N-2(1)
BLOCK START
OPERATE
Io
ENA_MULT
Calculated lo
GUID-7DA854F7-A732-46FD-A9D9-398B3E4150C8 V1 EN
Figure 17: Earth-fault protection
Three stages are offered for directional earth-fault protection. In addition, there is a
dedicated protection stage INTRPTEF either for transient-based earth-fault
protection or for cable intermittent earth-fault protection in compensated networks.
1MRS757456 D Section 3
REF611 standardized configurations
REF611 39
Application Manual

ABB REF611 Specifications

General

Brand	ABB
Model	REF611
Category	Protection Device
Language	English