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Documents & Manuals

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Tensioning Guide
Belt-diagram
C-120 pulleys
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Work Order Templates

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Daily Electrical System Inspection
Replace Roller and Pulley
Install Engine B-120
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Procedures

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Motion Industries
Applied Industrial Technologies
Electrical Brothers
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Drive Motor
B2 Rollers
Tensioning System
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Siemens Low Voltage Power Circuit Breaker WLF2S308

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Maintenance Plans for Siemens Low Voltage Power Circuit Breaker Model WLF2S308

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Arc Chute Removal

Warning: Mishandling may lead to broken insulation plates of the arc chute housing, and compromised insulation capacity.

Loosen screw by approx. 15 mm; do not remove it; FS III and FS II, class C: remove screw completely

Push the cover back; FS III: lift the cover carefully

Remove the cover

Take out the arc chute

Do not stand arc chutes up, when placing them on a table, or any other surface outside of the circuit breaker. The arc chutes should be placed on their side to prevent breakage of the insulation plates.

Sign off on the arc chute removal

Run this procedure

1 Yearly Circuit Breaker Maintenance

DANGER:

Hazardous voltage.

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.

WARNING:

High speed moving parts.

Can cause serious personal injury.

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Contact Erosion Check

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. Will cause serious personal injury. Do not place hands or objects within the arc chamber.

Circuit breaker is turned off and locked out

Circuit breaker is in the withdrawn position in the cradle

Closing spring is manually charged

Circuit breaker is closed

Arc chutes are removed

Is the indicator pin visible?

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

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Lower Moving Contact Removal

Clean and grease bearings and coupling bolts before assembly. (Grease: Isoflex Topas NB 52, Fa. Klüber Lubrication München KG)

Support connecting bars

Push out coupling bolt

Remove coupling bolt

Remove pole assemblies

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Arc Chute Check

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

Condition of arc splitter plates

Is there heavy wear (burnout) on arc splitter plates?

If heavy wear is observed, replace the arc chutes.

Arc chutes replaced if necessary

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