Circuit Breaker Controller - ABB RELION Series Technical Manual

Section 9
Control functions
9.4.4.7
646
PHLPTOC
I_A OPERATE
I_B
START
I_C
BLOCK
ENA_MULT
CB_POSITION
CB_READY
A070875 V3 EN
Figure 338: Configuration example of using the PROT_CRD output for protection
blocking
If the Protection crd limit setting has the value "1", the instantaneous three-phase
overcurrent protection function PHIPTOC is disabled or blocked after the first shot.

Circuit breaker controller

Circuit breaker controller contains two features: SOTF and frequent-operation
counter. SOTF protects the AR function in permanent faults.
The circuit breaker position information is controlled with the CB closed Pos status
setting. The setting value "TRUE" means that when the circuit breaker is closed, the
CB_POS input is TRUE. When the setting value is "FALSE", the CB_POS input is
FALSE, provided that the circuit breaker is closed. The reclose command pulse time
can be controlled with the Close pulse time setting: the CLOSE_CB output is active for
the time set with the Close pulse time setting. The CLOSE_CB output is deactivated
also when the circuit breaker is detected to be closed, that is, when the CB_POS input
changes from open state to closed state. The Wait close time setting defines the time
after the CLOSE_CB command activation, during which the circuit breaker should be
closed. If the closing of circuit breaker does not happen during this time, the
autoreclosing function is driven to lockout or, if allowed, an auto-initiation is
activated.
The main motivation for autoreclosing to begin with is the assumption that the fault is
temporary by nature, and that a momentary de-energizing of the power line and an
automatic reclosing restores the power supply. However, when the power line is
manually energized and an immediate protection trip is detected, it is very likely that
the fault is of a permanent type. A permanent fault is, for example, energizing a power
line into a forgotten earthing after a maintenance work along the power line. In such
cases, SOTF is activated, but only for the reclaim time after energizing the power line
and only when the circuit breaker is closed manually and not by the AR function.
DARREC
INIT_1 OPEN_CB
INIT_2 CLOSE_CB
INIT_3 CMD_WAIT
INIT_4 PROT_CRD
PROT_DISA
INIT_5
INIT_6
INPRO
DEL_INIT_2 LO CKED
DEL_INIT_3
UNSUC_RECL
DEL_INIT_4
AR_ON
BLK_RECL_T
BLK_RCLM_T
BLK_THERM
CB_POS
CB_READY
DISA_COUNT
INC_SHOTP
INHIBIT_RECL
RECL_ON
SYNC
1MRS758755 A
OR
CB_TRIP
CB_CLOSE
REC615 and RER615
Technical Manual