Siemens Low Voltage Power Circuit Breaker WLL2A308

DANGER: Hazardous voltage. Will cause death, serious personal injury, or equipment damage. Turn off and lock out all power supplying this device before working on this device.

WARNING: High speed moving parts. Can cause serious personal injury. Discharge the closing spring before inspection and before carrying out any work on the circuit breaker

Power turned off and locked out?

Upload a photo of the circuit breaker in open position

Sign off on the front panel change

NOTICE: Damage to the operator mechanism. Failure to install the actuating shaft retainer will cause the closing spring to discharge and will result in the operator mechanism being misaligned and damaged.

Press contacts together and hold them

Sign off on the pole assembly removal

Rearwall carefully draw off to view the end position retaining springs

Note the position of the end position retaining springs

Remove end position retaining springs

DANGER: Hazardous voltage. Will cause death, serious personal injury, or equipment damage. Turn off and lock out all power supplying this device before working on this device.

WARNING: High speed moving parts. Can cause serious personal injury. Discharge the closing spring before inspection and before carrying out any work on the circuit breaker.

NOTE: Pole assemblies are not field-replaceable for frame size III, M-class circuit breakers.

All three poles replaced at the same time?

Circuit breaker opened and closing spring discharged?

Circuit breaker removed from the cradle?

Sign off on the circuit breaker internal contact assembly replacement

- Charge closing spring of circuit breakers to be interlocked (page 6-4)

- Test the various possibilities of the planned interlocking configuration one after the other

- Re-adjust Bowden cables if necessary

- Discharge the closing spring of the circuit breakers to be interlocked (page 23-2)

Note: The following maintenance points must be followed:

1 The adjustment of the Bowden cables needs to be checked after the first 100 switching operations and must be readjusted if necessary.

2 The adjustment of the interlocking device needs to be checked and, if necessary, readjusted every 1000 operations or at least once every year.