Masterpact MTZ1 Commissioning

Masterpact MTZ Devices Overview

  • Apply appropriate personal protective equipment (PPE) and follow safe electrical work practices. See NFPA 70E, CSA Z462, NOM 029-STPS, or local equivalent.
  • This equipment must only be installed and serviced by qualified electrical personnel.
  • Unless specified otherwise in the commissioning procedures, all operations (inspection, test, and preventive maintenance) must be carried out with the device, the cradle, and the auxiliary circuits deenergized.
  • Check that the device and the cradle are de-energized on the upstream and downstream terminals.
  • Always use a properly rated voltage sensing device to confirm that the device, the cradle, and the auxiliary circuits are de-energized.
  • Install safety barriers and display a danger sign.
  • During the tests, it is strictly forbidden for anyone to touch the device, the cradle, or the conductors while voltage is applied.
  • Before putting the equipment back into operation, it is mandatory to check that all connections are made with the correct tightening torque, there are no tools or objects inside the equipment, all devices, doors, and protective covers are in position, and the device is off (open position).
Failure to follow these instructions will result in death or serious injury.

This chapter details the testing and commissioning procedure for Masterpact MTZ devices that must be done before the device can be accepted as fit for service and connected to a power supply.

The commissioning procedure must be done by an authorized commissioning engineer with appropriate training and experience:

  • Only qualified electrical personnel with training and experience on low voltage circuits must perform the work described in this chapter.
    Personnel must understand the hazards involved in working with or near low-voltage equipment. Such work must be performed only after reading the complete set of instructions.

  • Some inspections or procedures require that certain parts of the electrical system remain energized at hazardous voltage during the procedure. Observe all safety messages (Danger, Warning, Caution) throughout this chapter and the corresponding instruction notices.

  • Wear personal protective equipment, recognize potential hazards, and take adequate safety precautions when performing the procedures outlined in this chapter and the corresponding instruction notices.

The commissioning procedure assumes that the following conditions are met at the start of the procedure:

  • The device is not connected to a power system or a control system.

  • A drawout device is in the disconnected position.

  • The device is not connected to a communication network.

The results of all observations, tests, adjustments, together with any relevant comments must be recorded on the appropriate form, if applicable.

Wherever possible, testing must be done without disconnecting or disturbing existing wiring.

Masterpact MTZ Devices Scope

The commissioning procedure applies to the Masterpact MTZ intelligent modular unit (IMU), made up of:

  • Masterpact MTZ circuit breaker

  • Micrologic X control unit

  • Optional ULP modules:

    • One IFE, EIFE or IFM Modbus SL (RTU)

    • One or two IO modules

The associated information, which must be read with this procedure, includes specific schematic diagrams, connections, and trip levels for the devices covered by this document.

Masterpact MTZ Devices Equipment

The following equipment is required to do the tests detailed in the commissioning procedure:

  • Insulation resistance tester

  • Multimeter

  • A PC equipped with updated Ecoreach software

  • A USB to mini USB cable (LV850067SP) to connect the PC to the Micrologic X control unit

Masterpact MTZ1 Devices Test Form

A test form (see Masterpact MTZ1 Test Form) is available to guide you through the commissioning procedure and to record the results of the commissioning tests. Each test is described in detail in the Commissioning chapter.

Do only the tests required, depending on the Masterpact MTZ device type and the functions in use.

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