ABB RELION 615 Series Applications Manual page 50

Section 3
REG615 standard configurations
44
BLOCK
GUID-0C2E754B-1654-4783-8592-114295C871A5 V2 EN
Figure 17: Inrush detector function
Two negative-sequence overcurrent stages NSPTOC1 and NSPTOC2 are provided
for phase unbalance protection. These functions are used to protect the feeder against
phase unbalance.
CCSPVC1_FAIL
CCSPVC1_FAIL
NSPTOC1_OPERATE
NSPTOC2_OPERATE
GUID-3449C623-2993-4C9D-9973-D655F8B283A2 V2 EN
Figure 18: Negative sequence overcurrent protection function
One non-directional sensitive earth-fault stage EFHPTOC1 is offered for earth-fault
protection.
CCSPVC1_FAIL
GUID-EC5E7304-8DB0-4CF2-B4BA-E3C72DB8FF25 V2 EN
Figure 19: Earth-fault protection function
Three-phase thermal protection for feeders, cables and distribution transformers
T1PTTR1 detects overloads under varying load conditions. The BLK_CLOSE output
of the function is used to block the closing operation of the circuit breaker.
BLK_OPR
ENA_MULT
AMB_TEMP
GUID-F30D16E2-EE36-4B01-B992-C804C1E87AA7 V2 EN
Figure 20: Thermal overcurrent protection function
Circuit breaker failure protection CCBRBRF1 is initiated via the START input by a
number of different protection functions available in the relay. The breaker failure
protection function offers different operating modes associated with the circuit
breaker position and the measured phase and residual currents.
INRPHAR1(3I2f>(
BLK2H
NSPTOC1(I2>(1))
BLOCK
ENA_MULT
NSPTOC2(I2>(2))
BLOCK
ENA_MULT
OR
B1
B2
EFHPTOC1(Io>>(1
BLOCK OPERATE
ENA_MULT
T1PTTR1(3Ith>F(
OPERATE
START
ALARM
BLK_CLOSE
1MRS758272 B
INRPHAR1_BLK2H
OPERATE
NSPTOC1_OPERATE
START
NSPTOC1_START
OPERATE
NSPTOC2_OPERATE
START
NSPTOC2_START
O
NSPTOC_OPERATE
EFHPTOC1_OPERATE
START
EFHPTOC1_START
T1PTTR1_OPERATE
T1PTTR1_START
T1PTTR1_BLK_CLOSE
Application Manual
REG615