ABB Relion 611 Series - Page 48

X120-BI2
X100 PO2
LED 8
PHIPTOC1_OPERATE
PHHPTOC2_OPERATE
PHLPTOC1_OPERATE
PHHPTOC1_OPERATE
DEFHPTOC1_OPERATE
OR
DEFLPTOC1_OPERATE
DEFLPTOC2_OPERATE
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
CB Closed Position
51BF/51NBF(1)
3I
Io
START
TRRET
TRBU
POSCLOSE
CB_FAULT
BLOCK
CB_FAULT_AL
CCBRBRF1
3I>/Io>BF(1)
T1PTTR1
3Ith>F(1)
49F(1)
BLK_OPR
START
OPERATE3I
BLK_CLOSE
ALARMENA_MULT
AMB_TEMP
GUID-A046A312-1E3B-4186-BBEB-2AF8C2423C5F V1 EN
Figure 20: 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. The circuit-breaker
failure protection function offers different operating modes associated with the circuit
breaker position and the measured phase and residual currents. The breaker failure
protection has two operating outputs: TRRET and TRBU. The TRRET operate output
is used for retripping its own breaker through the Master Trip 2. 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 backup (TRBU) operate indication.
Section 3 1MRS757456 D
REF611 standardized configurations
42 REF611
Application Manual