ABB REF611 - Page 93

X120-BI2
X100 PO2
LED 8
SELGAPC3
OUT_2IN_4
OSWGAPC15
OUTIN_5
LED 4
THERMAL OVERLOAD PROTECTION
CIRCUIT BREAKER FAILURE PROTECTION
SELGAPC4
OUT_8
IN_17
OSWGAPC11
OUT
IN_1
SELGAPC4
OUT_4
IN_13
SELGAPC1
OUT_2IN_2
PHIPTOC1_OPERATE
PHHPTOC2_OPERATE
PHLPTOC1_OPERATE
PHHPTOC1_OPERATE
EFHPTOC1_OPERATE
OR
EFLPTOC1_OPERATE
EFLPTOC2_OPERATE
EFIPTOC1_OPERATE
CB Closed Position
51BF/51NBF(1)
3I
I
0
START
TRRET
TRBU
POSCLOSE
CB_FAULT
BLOCK
CB_FAULT_AL
CCBRBRF1
3I>/I
0
>BF(1)
T1PTTR1
3Ith>F(1)
49F(1)
BLK_OPR
START
OPERATE3I
BLK_CLOSE
ALARMENA_MULT
AMB_TEMP
GUID-05F6D382-22E2-41D8-84A3-1EC01A52B6B1 V3 EN
Figure 65: Thermal overload and circuit-breaker failure protection
The thermal overload protection T1PTTR1 provides indication on overload
situations. LED 4 is used for the thermal overload protection alarm indication.
The circuit-breaker failure protection CCBRBRF1 is initiated via the start input by a
number of different protection stages in the protection relay. CCBRBRF1 offers
different operating modes associated with the circuit-breaker position and the
measured phase and residual currents. CCBRBRF1 has two operating outputs:
TRRET and TRBU. The TRRET operate output is used for retripping its own circuit
breaker through Master Trip 2. The TRBU output is used to give a backup trip to the
circuit-breaker feeding upstream. For this purpose, the TRBU operate output signal is
connected to the output PO2 (X100:8-9). LED 8 is used for the backup (TRBU) operate
indication.
1MRS757456 D Section 3
REF611 standardized configurations
REF611 87
Application Manual