ABB REF615 F - Circuit Breaker Controller

Shot 1
(CBB1)
0.3s
Shot 2
(CBB2)
15.0s
INIT_1 (I>>)
INIT_2 (I>)
INIT_3 (Io>)
Lockout
Lockout
Lockout
A070875 V3 EN
Figure 385: 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.
9.4.4.7 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 auto-reclose function is driven to lockout or, if
allowed, an auto-initiation is activated.
The main motivation for auto-reclosing 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.
SOTF disables any initiation of an auto-reclose shot. The energizing of the power
line is detected from the CB_POS information.
SOTF is activated when the AR function is enabled or when the AR function is
started and the SOTF should remain active for the reclaim time.
When SOTF is detected, the parameter SOTF is active.
1YHT530004D05 D Section 9
Control functions
615 series 707
Technical Manual