Siemens Low Voltage Power Circuit Breaker WLL2A316

Warning: Ensure to strip off the driving collar of the spring dump mechanism when extracting the racking shaft (page 23-21).

Racking shaft pulled out on the other side

Sign off on the racking shaft removal

Charge the closing spring manually (page 6-4)

Using a screwdriver, cut the plastic indicator pin along the upper edge of the large recess

Is the indicator pin still visible?

If the indicator pin is no longer visible, the contact system must be replaced.

Will cause death, serious personal injury, or equipment/property damage.

Turn off and lock out all power supplying this device before working on this device.

Only qualified personnel should work on this equipment, after becoming thoroughly familiar with all warnings, safety notices, and maintenance procedures contained herein and on the devices.

The successful and safe operation of this equipment is dependent on proper handling, installation, operation and maintenance.

Can cause serious personal injury.

Lay circuit breaker on its side

Sign off on the current sensor removal

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.

Circuit breaker opened and closing spring discharged

Circuit breaker moved into the withdrawn position in the cradle

Arc splitter plates inspected for erosion

Arc splitter plates show signs of heavy wear (severe erosion, large deposits of molten metal, etc)

Circuit breaker's internal contacts replaced

Sign off on the arc chute check