About the Book

Document Scope

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

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 IEC circuit breaker with MicroLogic Active control unit that must be maintained:

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

  • Power connections

  • Chassis

  • Charging Mechanism

  • MicroLogic Active control unit

  • 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 IEC circuit breaker with MicroLogic Active control unit 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 circuit breakers with MicroLogic Active control unit.

Online Information

Convention

In this guide, the term MasterPacT MTZ device covers MasterPacT MTZ circuit breakers with MicroLogic Active control unit.

Related Documents

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.