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The output
BLK2H
of three-phase inrush detector INRPHAR1 enables either blocking
the function or multiplying the active settings for any of the available overcurrent or
earth-fault function blocks.
INRPHAR1
BLOCK
BLK2H
INRPHAR1_BLK2H
GUID-C4B49350-27F3-4310-AC69-1B01CD67F03B V1 EN
Figure 449:
Inrush detector function
Two negative-sequence overcurrent protection stages NSPTOC1 and NSPTOC2 are
provided for phase unbalance protection. These functions are used to protect the
feeder against phase unbalance. Both the negative sequence overcurrent protections
are blocked in case of detection in failure in secondary circuit of current transformer.
NSPTOC1
BLOCK
ENA_MULT
OPERATE
START
NSPTOC2
BLOCK
ENA_MULT
OPERATE
START
OR
B1
B2
O
NSPTOC1_OPERATE
NSPTOC1_OPERATE
NSPTOC2_OPERATE
NSPTOC2_OPERATE
NSPTOC1_START
NSPTOC2_START
CCSPVC1_FAIL
CCSPVC1_FAIL
NSPTOC_OPERATE
GUID-6143300A-A295-45FC-A14A-D0F05747F5E5 V2 EN
Figure 450:
Negative-sequence overcurrent protection function
Six stages are provided for earth-fault protection. Two stages are dedicated for
directional earth-fault protection. Apart from these earth-fault protection functions,
configuration also includes a dedicated high impedance restricted earth-fault
protection function.
1MRS756378 S
Section 3
REF615 standard configurations
REF615
297
Application Manual
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