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ElectricalPreventiveGeneral

Motor Starter / Contactor PM

Preventive inspection and cleaning of motor starters, contactors, and overload relays.

Estimated time

1 hours

Craft required

1 technician(s)

Skill level

journeyman

Procedure steps

  1. 1

    LOTO motor starter and verify zero voltage

    ~10 minLOTO required
  2. 2

    Inspect contactor tips for pitting or welding

    ~15 minLOTO required
  3. 3

    Check overload settings against motor FLA nameplate

    ~10 minLOTO required
  4. 4

    Tighten power and control terminations to spec

    ~10 minLOTO required
  5. 5

    Restore power; bump motor and verify smooth start

    ~10 min

Safety notes

  • De-energize and LOTO starter cubicle
  • Capacitors may retain charge

Tools

  • • Multimeter
  • • Contact cleaner
  • • Torque screwdriver
  • • IR thermometer

Parts

  • • Contact kit (if worn)
  • • Overload heaters (match FLA)