ABB RELION 615 Series Applications Manual page 81

1MRS758272 B
REG615
Application Manual
DEFHPDEF1_OPERATE
DEFLPDEF2_OPERATE
DEFLPDEF1_OPERATE
EFHPTOC1_OPERATE
GUID-C7981340-D7D1-4F19-9A89-08343F9C8022 V2 EN
Figure 79: Earth-fault protection function
Third harmonic-based stator earth-fault protection is provided to give 100% stator
winding protection. The protection is blocked by MCB open from neutral side VT.
X110_BI2_NEUTRAL_VT_MCB_OPEN
X110_BI7_CB_CLOSED
GUID-C27337B1-C47F-4DF8-A1F7-817D5738427B V2 EN
Figure 80: Third harmonic-based stator earth-fault protection function
Three-phase thermal overload protection, two time constants, T2PTTR1 detects
continuous overloading conditions preventing excessive insulation damage in the
long run.
BLOCK
AMB_TEMP
GUID-C253628A-3CC5-4868-AAB6-8B563DC52AEB V2 EN
Figure 81: 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.
The circuit breaker failure protection function has two operating outputs: TRRET and
TRBU. The TRRET operating output is used for retripping its own breaker through
TRPPTRC2_TRIP. The TRBU output gives a backup trip to the breaker feeding
upstream. For this purpose, the TRBU operating output signal is connected to the
binary output X100:PO2. In addition, TRBU operating output is also used to trip field
excitation circuit breaker through TRPPTRC6_TRIP_FIELD EXCITATION.
REG615 standard configurations
EFHPTOC1
BLOCK OPERATE
ENA_MULT START
OR6
B1
B2
B3
B4
B5
B6
H3EFPSEF1
BLOCK
GCB_CLOSED
T2PTTR1
OPERATE
START
ALARM
BLK_CLOSE
Section 3
EFHPTOC1_OPERATE
EFHPTOC1_START
O
EF_OPERATE
OPERATE
H3EFPSEF1_OPERATE
START
H3EFPSEF1_START
INT_BLKD
T2PTTR1_OPERATE
T2PTTR1_START
75