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Documents & Manuals

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

Pre-built workflows to keep your asset running smoothly.

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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Parts

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Drive Motor
B2 Rollers
Tensioning System
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Siemens Low Voltage Power Circuit Breaker WLH2A308

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Maintenance Plans for Siemens Low Voltage Power Circuit Breaker Model WLH2A308

Integrate maintenance plans directly into your work orders in MaintainX.

Rear Wall Removal

Remove upper screws

Remove lower screws

Support circuit breaker

Rearwall carefully draw off to view the end position retaining springs

Note the position of the end position retaining springs

Separate and remove rearwall

Remove end position retaining springs

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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 opened and closing spring discharged

Circuit breaker moved into the withdrawn position in the cradle

Closing spring manually charged

Circuit breaker closed

Arc chutes removed

Is the indicator pin visible?

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

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Circuit Breaker Removal

Circuit breaker cranked into the disconnected position

Racking handle unlocked / withdrawn

Racking handle pushed in

NOTICE: Racking Handle Damage. Turning the racking handle beyond the stop will cause damage to the racking mechanism.

Racking handle rotated counter-clockwise until it can be stowed

Circuit breaker pulled into withdrawn position and removed

Sign off on the circuit breaker removal

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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

Front Panel Change

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?

Closing spring discharged?

Upload a photo of the open circuit breaker

Sign off on the front panel change

Run this procedure