Presentation

The replacement procedure described in this guide specifically applies to:

• The replacement of a MicroLogic Active control unit embedded in a MasterPacT MTZ circuit breaker, by another MicroLogic Active control unit.

• The removal and reinstallation of a MicroLogic Active control unit embedded in a MasterPacT MTZ circuit breaker, for example during the replacement of an accessory.

It does not apply to any other MicroLogic Active replacement scenario.

In all cases, the replacement procedure must be followed by the compulsory tests to perform after reinstallation of the MicroLogic Active control unit.

The replacement of a MicroLogic Active control unit must be carried out by accredited Schneider Electric Services representatives or accredited Schneider Electric certified partners.

Replacement Process

Stage	Description
1	Obtain data from the initial MicroLogic Active control unit.
2	On site, prepare the MasterPacT MTZ1 circuit breaker or MasterPacT MTZ2/MTZ3 circuit breaker, before working on the equipment.
3	Replace the MicroLogic Active control unit.
4	Test the replacement MicroLogic Active control unit: Perform a Primary Injection Test. Perform a Secondary Injection Test. Test the Microswitch.
5	Prepare the MasterPacT MTZ circuit breaker before setting.
6	Set data in the replacement MicroLogic Active control unit.