ABB relion REF615 Applications Manual page 84

Section 3
REF615 standard configurations
78
BLOCK
GUID-ED765A4F-9F2B-4546-BE25-269CBABC0F9D V1 EN
Figure 55: 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.
NSPTOC1_OPERATE
NSPTOC2_OPERATE
GUID-825A5CAA-9EEF-433A-9977-D52FF37CBFFC V1 EN
Figure 56: Negative-sequence overcurrent protection function
Three stages are provided for directional earth-fault protection. According to the
IED's order code, the directional earth-fault protection method can be based on
conventional directional earth-fault DEFxPDEF only or alternatively used together
with admittance-based earth-fault protection EFPADM or wattmetric-based earth-
fault protection WPWDE or harmonics-based earth-fault protection HAEFPTOC1. In
addition, there is a dedicated protection stage INTRPTEF either for transient-based
earth-fault protection or for cable intermittent earth-fault protection in compensated
networks.
The binary input X110:BI2 is used for controlling directional earth-fault protection
block's relay characteristic angle (RCA: 0°, -90°) or operation mode (IoSinφ,
IoCosφ) change. The same input is also available for wattmetric protection.
INRPHAR1
BLK2H
NSPTOC1
BLOCK OPERATE
ENA_MULT START
NSPTOC2
BLOCK OPERATE
ENA_MULT START
OR
B1
B2
1MRS756378 S
INRPHAR1_BLK2H
NSPTOC1_OPERATE
NSPTOC1_START
NSPTOC2_OPERATE
NSPTOC2_START
O
NSPTOC_OPERATE
Application Manual
REF615