HREFPDIF1
BLOCK OPERATE
START
HREFPDIF1_OPERATE
HREFPDIF1_START
GUID-8034927A-76EB-4106-8ACE-2408181CF096 V1 EN
Figure 453: High impedance restricted 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 circuit breaker.
T1PTTR1
BLK_OPR
ENA_MULT
TEMP_AMB
OPERATE
START
ALARM
BLK_CLOSE
T1PTTR1_BLK_C LOSE
T1PTTR1_START
T1PTTR1_OPERATE
GUID-260F8A52-6DC6-41E9-9AA2-F37CBA88AB14 V1 EN
Figure 454: Thermal overcurrent protection function
Fault locator SCEFRFLO1 provides impedance-based fault location. Function is
triggered by operation of non-directional overcurrent and earth-fault protection
function. However the outputs of fault locator are not connected to any logic and those
needs to be connected as per application need.
SCEFRFLO1
BLOCK
TRIGG
TRIGG_XC0F
ALARM
OR6
B1
B2
B3
B4
B5
B6
O
OR
B1
B2
O
EFLPTOC2_OPERATE
PHIPTOC1_OPERATE
PHLPTOC1_OPERATE
PHHPTOC1_OPERATE
EFLPTOC1_OPERATE
EFHPTOC1_OPERATE
GUID-129824AC-339E-453E-A209-6C2D79259970 V1 EN
Figure 455: Fault locator 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.
1MRS756378 S Section 3
REF615 standard configurations
REF615 299
Application Manual
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