About the Book

Document Scope

Schneider Electric recommends a preventive maintenance program to ensure that devices retain the operating and technical characteristics specified in the catalogs during their service life. Maintenance must be carried out by trained and qualified personnel, in accordance with instructions specified in this MasterPacT™ MTZ maintenance guide.

This guide contains information on:

• Maintenance frequency depending on the environmental and operating conditions and criticality of the user application.

• Maintenance required after prolonged storage.

• Schneider Electric tools for maintenance assistance.

• The parts of the MasterPacT MTZ devices that must be maintained:

  • Elements of the breaking unit: case, arc chutes, and main contacts

  • Power connections

  • Chassis

  • Charging mechanism

  • MicroLogic™ X control unit

  • Communication system

  • Auxiliary circuits

  • Mechanical interlocking systems

• The risks involved when a part is not fully operational.

• The preventive maintenance program to be carried out, and the competence level required for each program.

• Environmental and operating conditions that cause accelerated aging of a device.

• Limits governing the use of mechanical and electrical accessories and subassemblies.

• Links to device guides and related documents that can help to maintain the MasterPacT MTZ devices in proper operating order.

Audience

This guide is intended for trained and qualified personnel in charge of equipment maintenance and for Schneider Electric Services representatives in charge of equipment maintenance and diagnostics.

Validity Note

This guide applies to MasterPacT MTZ IEC switch-disconnectors and circuit breakers with MicroLogic X control unit.

Online Information

The information contained in this guide is likely to be updated at any time. Schneider Electric strongly recommends that you have the most recent and up-to-date version available on www.se.com/ww/en/download.

The technical characteristics of the devices described in this guide also appear online. To access the information online, go to the Schneider Electric home page at www.se.com.

Convention

In this guide, the term MasterPacT MTZ device covers circuit breakers with MicroLogic X control unit and switch-disconnectors.

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Trademarks

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Information on Non-Inclusive or Insensitive Terminology

As a responsible, inclusive company, Schneider Electric is constantly updating its communications and products that contain non-inclusive or insensitive terminology. However, despite these efforts, our content may still contain terms that are deemed inappropriate by some customers.