Siemens Low Voltage Power Circuit Breaker WLF2A308

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.

It is strongly recommended that the breaker's internal contacts be inspected on a regular basis. Load breaking and short-circuit trips cause contact erosion. The WL circuit breaker is equipped with a contact erosion indicator for monitoring wear of the circuit breaker's internal contacts.

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

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

Will cause serious personal injury.

Do not place hands or objects within the arc chamber

Lay circuit breaker on its side

Sign off on the current sensor removal

It is recommended that the arc chutes be inspected on a regular basis.The arc splitter plates erode as the result of load breaking. This constitutes normal wear. The erosion of the arc splitter plates can manifest itself as wear of the plates, a layer of soot, or small spots of collections of molten metal. In case of heavy wear (severe erosion, large deposits of molten metal, etc), the circuit breaker should be replaced.

It is also necessary to replace the arc chutes when the circuit breaker's internal contacts are replaced. See Checking contact erosion (page 23-10) for evaluation of contact wear, and Replacing the circuit breaker internal contact assemblies (page 23-11) for internal contact replacement.

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

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

Can cause serious personal injury.

Charge the closing spring manually (refer to page 6-4)

Close the system (refer to page 6-7)

Using a screwdriver, cut the plastic indicator pin along the upper edge of the large recess. Was this successful?

Is the indicator pin still visible?

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

Sign off on the contact wear indicator adjustment