ABB Relion 615 series - Page 80

OR6
O:160|T:2.5|I:62
B1
B2
B3
B4
B5
B6
O
UPSTEAM_OC_BLOCKING
D
PHLPDOC2_67/51P-2_PICKUP
GUID-908E611F-601E-4D56-87FB-4B26D2609AA0 V1 EN
Figure 55: Upstream blocking logic
The output BLK2H of three-phase inrush detector INRPHAR1_INR-1 enables either
blocking the function or multiplying the active settings for any of the available
overcurrent or ground-fault function blocks.
INRPHAR1
O:108|T:2.5|I:1
BLOCK BLK2H
INRPHAR1_INR-1_BLK2H
GUID-E08204A5-87A6-40CC-B6D3-C89231CD0286 V1 EN
Figure 56: Inrush detector function
Two negative-sequence overcurrent protection stages NSPTOC1_46-1 and
NSPTOC2_46-2 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
O:49|T:5|I:1
BLOCK
ENA_MULT
TRIP
PICKUP
NSPTOC2
O:50|T:5|I:2
BLOCK
ENA_MULT
TRIP
PICKUP
OR
O:149|T:2.5|I:19
B1
B2
O
NSPTOC1_46-1_TRIP
NSPTOC1_46-1_TRIP
NSPTOC2_46-2_TRIP
NSPTOC2_46-2_TRIP
NSPTOC1_46-1_PICKUP
NSPTOC2_46-2_PICKUP
CCSPVC1_CCM_FAIL
CCSPVC1_CCM_FAIL
NSPTOC_TRI P
GUID-E761F91D-D886-48A3-B4D4-740E94220DAB V1 EN
Figure 57: Negative-sequence overcurrent protection function
Three stages are provided for directional ground-fault protection DEFxPDEF_67/5xN.
One stage is provided for non-directional ground-fault protection EFHPTOC1_50G-1.
According to the relay's order code, the directional ground-fault protection method can be
Section 3 1MAC109016-MB C
REF615 standard configurations
74 REF615 ANSI
Application Manual