ABB RELION 615 Series Applications Manual page 146

Section 3
REF615 standard configurations
140
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.
DPHLPDOC2_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.
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.
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
OR6
B1 O
B2
B3
B4
B5
B6
O:144|T:2.5|I:65
INRPHAR1
BLOCK BLK2H
O:103|T:2.5|I:1
NSPTOC1
BLOCK TRIP
ENA_MULT PICKUP
O:51|T:5|I:1
NSPTOC2
BLOCK TRIP
ENA_MULT PICKUP
O:52|T:5|I:2
1MAC109016-MB C
UPSTEAM_OC_BLOCKING
INRPHAR1_INR-1_BLK2H
NSPTOC1_46-1_TRIP
NSPTOC1_46-1_PICKUP
NSPTOC2_46-2_TRIP
NSPTOC2_46-2_PICKUP
REF615 ANSI
Application Manual