LED 3
UNBALANCE PROTECTION
NSPTOC1
I
2
>(1)
46(1)
BLOCK
START
OPERATE
3I
ENA_MULT
NSPTOC2
I
2
>(2)
46(2)
BLOCK
START
OPERATE
3I
ENA_MULT
SELGAPC4
IN_12
OUT_3
OSWGAPC10
OR
OUT
IN_9
IN_10
IN_11
PDNSPTOC1
I
2
/I
1
(1)
46PD(1)
BLOCK
START
OPERATE
3I
GUID-4CFBCA74-5D5E-4C39-87DE-18EE2BE86C19 V1 EN
Figure 64:
Unbalance protection
Two negative-sequence overcurrent stages NSPTOC1 and NSPTOC2 and one phase
discontinuity stage PDNPSTOC1 are offered for the unbalance protection. The phase
discontinuity protection PDNPSTOC1 provides protection for interruptions in the
normal three-phase load supply, for example, in downed conductor situations.
The operate signals of these unbalance protections are connected to the Master Trip
and also to alarm LED 3.
Section 3
1MRS757456 D
REF611 standardized configurations
86
REF611
Application Manual
Содержание REF611
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