Workscope: Motor Starter (Limit-Amp) - Major Overhaul

• The contactor will be inspected for worn, damaged and missing components
  

  -	Inspection includes, but is not limited to, damaged secondary power connections, bent or damaged interlock arms, cracked frame, bent primary disconnects and missing hardware.
  -	Any item found damaged will be recorded and a suitable replacement identified.

• Phase barriers will be removed and interrupters will be inspected for erosion and damage
  

  -	Barriers will be inspected for cracks and damage.
  -	Interrupter assemblies will be inspected for chipped or broken fins.
  -	Any item found damaged will be recorded and a suitable replacement identified.

• Contacts will be cleaned (as applicable) and inspected for proper wipe and signs of deterioration
  

  -	Contact structures will be disassembled and all components inspected for damage and wear.
  -	All component parts will be cleaned.
  -	The contact structures will be re-assembled.
  -	Parts needing silver plating will be quoted separately.

• Contacts/interrupters will be replaced as necessary
  

  -	Where available, interrupter assemblies containing asbestos should be replaced with the manufacturer's recommended non-asbestos parts. These asbestos replacement parts will be quoted at the customer's request.
  -	Upon request, GE will properly dispose off the asbestos-containing materials.

• The frame and mechanism will be cleaned and inspected
  

  -	The contactor frame will be disassembled and inspected for damage and wear.
  -	The contactor mechanism will be disassembled into component parts and each part inspected for damage or wear.
  -	All parts will be cleaned and re-assembled.

• The operating mechanism will be lubricated with extended life lubricant. Mechanical adjustments will be checked and adjusted as required
  

  -	Contact wipe and gap measurements will be taken as required.
  -	Mechanism adjustments will be completed according to manufacturer's specification.

• Interlocks, mechanical and electrical, will be checked and adjusted for proper operation, if necessary.
• Electrical accessory devices will be tested for proper operation (if applicable)
• Final electrical tests will be performed, as applicable
  

  -	Contact resistance tests - A digital low resistance ohmmeter will be used to record the contact resistance and compare it to the manufacturer's specifications. High resistance in the contact structure
  -	Insulation resistance tests - A 500 to 1,000 volt megger will be used to determine the condition of the circuit breaker insulation to ground and across phases.
  -	Vacuum integrity test (if applicable) - The vacuum integrity test is used to verify the condition of the vacuum interrupters.
  -	Functional/operational tests (electrical and manual) - Control power will be used to operate the contactor and verify correct operation and measurements.

• Test data will be included as part of the final customer report
  

  -	All test data received will be included with the circuit breaker test report.
  -	A quotation of recommended repairs will be generated and sent to the customer.

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