ABB relion REF615 Applications Manual page 108

Section 3
REF615 standard configurations
102
X120_BI1_EXT_OC_BLOCKING
PHIPTOC1_OPERATE
PHHPTOC1_OPERATE
PHHPTOC2_OPERATE
PHLPTOC1_OPERATE
GUID-FED7D122-DE13-4004-8273-906D289F7EBA V1 EN
Figure 98: Overcurrent protection functions
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.
BLOCK
GUID-D54BF44E-9EBD-4C83-ABDD-49BB5BB6373E V1 EN
Figure 99: 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.
PHIPTOC1
BLOCK
ENA_MULT
PHHPTOC1
BLOCK
ENA_MULT
PHHPTOC2
BLOCK
ENA_MULT
PHLPTOC1
BLOCK
ENA_MULT
OR6
B1
B2
B3
B4
B5
B6
INRPHAR1
BLK2H
1MRS756378 S
OPERATE
PHIPTOC1_OPERATE
START
PHIPTOC1_START
OPERATE
PHHPTOC1_OPERATE
START
PHHPTOC1_START
OPERATE
PHHPTOC2_OPERATE
START
PHHPTOC2_START
OPERATE
PHLPTOC1_OPERATE
START
PHLPTOC1_START
O
PHxPTOC_OPERATE
INRPHAR1_BLK2H
Application Manual
REF615