1VAL050503-MB Rev B Replaces (1VAL057485-MB Rev. C) Oct 2013
19
E
LECTRICAL
O
PERATION
:
To operate the breaker electrically, control power must be available. The section entitled
Racking
describes the
application of control power through the secondary disconnect when the breaker is in the Test and Connect positions.
Optional test jumpers and test cabinets to connect control power to a withdrawn circuit breaker are available (contact the
local ABB sales office for details).
1. Inspect initial state of the breaker to determine the operations available from Table 2 on previous page.
a. Close/Open Indicator
b. Closing Spring Charged/Discharged Indicator
c. Circuit breaker position Test or Connect (or control power applied externally, if withdrawn)
2. Energize Control Power source
a. Charging motor energizes
Charge time approximately 8-10 seconds (at nominal voltage)
Closing Spring Charged/Discharged Indicator shows CHARGED
b. Breaker ready to perform C-O operation
3. Close breaker using manual close push-button or by electrical signal to the rclose coil (after close operation the motor
charges unless control power is removed)
a. Close coil operates
Close/Open Indicator changes to CLOSED
Closing Spring Charged/Discharged Indicator changes to DISCHARGED
Charging motor energizes
Charge time approximately 8-10 seconds (at nominal voltage)
Closing Spring Charged/Discharged Indicator shows CHARGED
b. Breaker ready to perform O-C-O operation
4. Open breaker using manual open push-button or by electrical signal to the open coil
a. Open coil operates and opens breaker
Close/Open Indicator changes to OPEN
Closing Spring Charged/Discharged Indicator remains CHARGED
b. Breaker ready to perform C-O operation
5. Breaker ready to continue operations returning to step 3 above until the source of the control power is deactivated.
Once control power is removed from the charging motor, the Closing Spring will not recharge after a close operation.
MECHANISM AND OPERATION