Schneider Electric Circuit Breaker MTZ1-1000-H2

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

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

Use a thin screwdriver to briefly push in (<1 s) the test button on the control unit

Check that all indicators are in the correct state after the test

Reset the circuit breaker after the test

CAUTION! DETERIORATION OF VPS MODULE

Disconnect the VPS module and unplug any cables from the mini USB port on the front face of the Micrologic X control unit.

Close the Masterpact MTZ device.

Measure the insulation resistance using a 500 Vdc insulation resistance tester between one of the phases and the other two phases grounded. Repeat for each phase.

Open the Masterpact MTZ device by pressing the opening pushbutton.

Measure the insulation resistance using a 500 Vdc insulation resistance tester between one of the phases and ground, with all other phases grounded. Repeat for each phase.

Check that the insulation resistance is above 5 MΩ in each case.

Contact your field service representative if the insulation resistance is not above 5 MΩ.

Use a thin screwdriver to briefly push in (<1 s) the test button on the control unit

Check that the circuit breaker is open

Check that the blue fault-trip reset button has popped out

Check that the Ig/IΔn LED is on

Check that the SDE contacts have switched

Reset the circuit breaker after the test