Presentation

DANGER
HAZARD OF ELECTRIC SHOCK, EXPLOSION, OR ARC FLASH Do not install a MicroLogic Active control unit with version number less than 004.000.000 in a MasterPacT MTZ circuit breaker with performance level L1 or H3. Failure to follow these instructions will result in death or serious injury.

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.

NOTE: Replacement of a MicroLogic Active control unit in MasterPacT NT/NW circuit breakers must be carried out by accredited Schneider Electric Services representatives or accredited Schneider Electric certified partners.

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

Replacement Process

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

MicroLogic Active Replacement Video

To access a demonstration video about replacement of a MicroLogic Active control unit, click here, scan the QR code, or copy and paste the link to your Web browser: