ABB relion REF615 Applications Manual page 110

Section 3
REF615 standard configurations
104
Phase discontinuity protection PDNSPTOC1 protects from interruptions in the
normal three-phase load supply, for example, in downed conductor situations.
BLOCK
GUID-72DBEEFC-1AD7-4930-A949-A340CF2767AA V1 EN
Figure 103: Phase discontinuity protection
Three-phase thermal protection for feeders, cables and distribution transformers
T1PTTR1 detects overloads under varying load conditions.
BLK_OPR
ENA_MULT
TEMP_AMB
GUID-59CDFFD0-91B8-4746-B478-32FC628A357D V1 EN
Figure 104: Thermal overcurrent protection function
Circuit breaker failure protection CCBRBRF1 is initiated via the START input by
number of different protection functions available in the IED. The breaker failure
protection function offers different operating modes associated with the circuit
breaker position and the measured phase and residual currents.
The circuit breaker failure protection function has two operating outputs: TRRET and
TRBU. The TRRET operate output is used for retripping its own breaker through
TRPPTRC2_TRIP. The TRBU output is used to give a backup trip to the breaker
feeding upstream. For this purpose, the TRBU operate output signal is connected to the
binary output X100:PO2.
OR6
B1
PHIPTOC1_OPERATE
PHHPTOC1_OPERATE B2
PHHPTOC2_OPERATE B3
B4
EFLPTOC1_OPERATE
B5
EFHPTOC1_OPERATE
B6
EFIPTOC1_OPERATE
OR6
B1
ARCSARC1_OPERATE
B2
ARCSARC2_OPERATE
B3
ARCSARC3_OPERATE
B4
B5
B6
X120_BI2_CB_CLOSED
GUID-6AB0BAF9-2B09-46D6-94DB-EBF6EF3F113A V1 EN
Figure 105: Circuit breaker failure protection function
Three arc protection ARCSARC1...3 stages are included as an optional function. The
arc protection offers individual function blocks for three arc sensors that can be
connected to the IED. Each arc protection function block has two different operation
modes, that is, with or without the phase and residual current check.
The operate signals from ARCSARC1...3 are connected to both trip logic TRPPTRC1
and TRPPTRC2.
PDNSPTOC1
OPERATE
START
T1PTTR1
OPERATE
START
ALARM
BLK_CLOSE
OR6
O B1
B2
B3
B4
B5
B6
O
1MRS756378 S
PDNSPTOC1_OPERATE
PDNSPTOC1_START
T1PTTR1_OPERATE
T1PTTR1_START
T1PTTR1_ALARM
CCBRBRF1
BLOCK CB_FAULT_AL
O START TRBU
POSCLOSE TRRET
CB_FAULT
Application Manual
CCBRBRF1_TRBU
CCBRBRF1_TRRET
REF615