ABB relion REF615 Applications Manual page 87

1MRS756378 S
REF615
Application Manual
A dedicated non-directional earth-fault protection block EFHPTOC protects from
double earth-fault situations in isolated or compensated networks. The protection
function uses the calculated residual current originating from the phase currents.
BLOCK
ENA_MULT
GUID-F3F7FE78-72D3-4491-AF23-BA53F8ED35D7 V1 EN
Figure 61: Non-directional earth-fault protection
Phase discontinuity protection PDNSPTOC1 protects from interruptions in the
normal three-phase load supply, for example, in downed conductor situations.
BLOCK
GUID-1B82152F-2E3C-4894-8E9C-8148BE01D12C V1 EN
Figure 62: 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-EBDA9A91-9075-4D0F-8B3F-E3035732C9B1 V1 EN
Figure 63: 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 output TRBU gives a backup trip to the breaker feeding
upstream. For this purpose, the TRBU operate output signal is connected to the binary
output X100:PO2.
PHIPTOC1_OPERATE B1
B2
PHHPTOC1_OPERATE
B3
PHHPTOC2_OPERATE
B4
ARCSARC1_OPERATE
B5
ARCSARC2_OPERATE
B6
ARCSARC3_OPERATE
B1
DEFHPDEF1_OPERATE
B2
DEFLPDEF2_OPERATE
B3
WPWDE2_OPERATE
B4
WPWDE3_OPERATE
B5
EFPADM2_OPERATE
EFPADM3_OPERATE B6
X120_BI2_CB_CLOSED
GUID-3CC55117-F6EF-4ABF-BF0E-FFC78F84833A V1 EN
Figure 64: Circuit breaker failure protection function
REF615 standard configurations
EFHPTOC1
OPERATE
START
PDNSPTOC1
OPERATE
START
T1PTTR1
OPERATE
START
ALARM
BLK_CLOSE
OR6 OR6
O B1
B2
B3
B4
B5
B6
OR6
O
Section 3
EFHPTOC1_OPERATE
EFHPTOC1_START
PDNSPTOC1_OPERATE
PDNSPTOC1_START
T1PTTR1_OPERATE
T1PTTR1_START
T1PTTR1_ALARM
CCBRBRF1
BLOCK CB_FAULT_AL
O START TRBU
POSCLOSE TRRET
CB_FAULT
CCBRBRF1_TRBU
CCBRBRF1_TRRET
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