Schneider Electric Circuit Breaker MTZ1-1000-L1

Record equipment identification

Check that the device is undamaged, correctly mounted, and securely fastened in the switchboard

Check the 3-phase clearance at terminal blocks

Check for debris at the back of the device housing/enclosure

Check that the ground terminals are securely connected with the correct grounding cables

Check that all external surfaces are undamaged

Rectify any non-conformities, if possible

Refer all equipment non-conformities to asset management

Power the Micrologic X control unit

Check the Micrologic X Ready LED status

If the Ready LED is not flashing green, refer to chapter Critical Cases

Remove the MCH gear motor power supply

Perform an opening/closing/opening cycle to discharge the mechanism

Check electrical continuity and non-continuity

Reconnect the MCH gear motor power supply

Confirm the device closes and the mechanism is automatically charged

Manually charge the mechanism by pulling the spring charging handle down

Check the closing of the device in the different control modes and means designed for the application

Check the opening of the device in the different control modes and means designed for the application

Check electrical continuity for each phase

For fixed device: Check continuity on the power terminals

For drawout device: Check continuity on the chassis power terminals with the device in the connected position

Record any anomalies found during the continuity check

Verify all tools and equipment are removed from the work area

Sign off on the completion of the procedure