Introduction

Preventive maintenance tasks on MasterPacT MTZ circuit breakers with MicroLogic X control units, and on MasterPacT MTZ switch-disconnectors, are to be carried out following the Schneider Electric maintenance strategy.

Preventive maintenance tasks are organized into three programs depending on complexity and maintenance frequency:

• Routine end-user maintenance

• Intermediate end-user maintenance

• Manufacturer maintenance

For more information on the Schneider Electric maintenance strategy, refer to MasterPacT MTZ - IEC Switch-Disconnectors and Circuit Breakers with MicroLogic X Control Unit - Maintenance Guide in Related Documents at the beginning of this guide.

Instruction Sheets

When a corrective action in a maintenance procedure references an instruction sheet, refer to the Related documents section at the top of the procedure to find the relevant instruction sheet for the product.

For example, a reference to MasterPacT MTZ - MN-MX-XF Voltage Releases - Instruction Sheet means using:

• MasterPacT MTZ1/MTZ2/MTZ3 - MN-MX-XF Voltage Releases - Instruction Sheet or

• MasterPacT MTZ1/MTZ2/MTZ3 - MN-MX-XF Communicating Voltage Releases with Diagnostic Function - Instruction Sheet.

Instruction sheets are available on TIPI, the internal website for Schneider Electric Services representatives.

Illustrations

The pictures and drawings in this document are for illustration only.

Tools

Performing the procedures of the maintenance program requires the following:

• A standard toolbox with electrical tools and equipment for an electrician.

• Specific tools, detailed in the maintenance procedures.