GUID-A367FC04-F391-48E9-9CBF-599AC625C7FF V1 EN
Figure 19: Unbalance protection
Two negative-sequence overcurrent stages NSPTOC1 and NSPTOC2 and one phase
discontinuity stage PDNPSTOC1 are offered for 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 to alarm LED 3.
1MRS757456 D Section 3
REF611 standardized configurations
REF611 41
Application Manual
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