ABB Relion 615 series - Page 146

The upstream blocking from the pickup of the second low stage of three-phase directional
overcurrent protection DPHLPDOC2_67/51P-2 is connected to the binary output
X110:SO1. This output can be used for sending a blocking signal to the relevant
overcurrent protection stage of the relay at the infeeding bay.
OR6
O:144|T:2.5|I:65
B1
B2
B3
B4
B5
B6
O
UPSTEAM_OC_BLOCKINGDPHLPDOC2_67/51P-2_PICKUP
GUID-521CF39B-4A35-4293-AC42-15BA90D21B36 V1 EN
Figure 169: 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:103|T:2.5|I:1
BLOCK BLK2H
INRPHAR1_INR-1_BLK2H
GUID-C7820A35-3477-402F-90DC-C0C5D9992258 V1 EN
Figure 170: 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:51|T:5|I:1
BLOCK
ENA_MULT
TRIP
PICKUP
NSPTOC2
O:52|T:5|I:2
BLOCK
ENA_MULT
TRIP
PICKUP
NSPTOC1_46-1_TRIP
NSPTOC2_46-2_TRIP
NSPTOC1_46-1_PICKUP
NSPTOC2_46-2_PICKUP
CCSPVC1_CCM_FAIL
CCSPVC1_CCM_FAIL
GUID-3CDF9CBF-DBDC-44D0-A4CB-F8D207F22E34 V1 EN
Figure 171: Negative-sequence overcurrent protection function
Three stages are provided for directional ground-fault protection. According to the relay's
order code, the directional ground-fault protection method can be based on conventional
directional ground-fault DEFxPDEF_67/5xN only or alternatively used together with
admittance-based ground-fault protection EFPADM_21YN or wattmetric-based ground-
fault protection WPWDE_32N. A dedicated protection stage INTRPTEF_67NIEF is used
either for transient-based ground-fault protection or for cable intermittent ground-fault
Section 3 1MAC109016-MB C
REF615 standard configurations
140 REF615 ANSI
Application Manual