Class I Repair
for AC Electric Motors:
Renewed Reliability
Procedure:
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Incoming meggar test
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Check shaft run out (only if shaft turns: incoming inspection)
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Dismantle
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Test stator windings (visual, meggar, surge, high potential as required – medium voltage)
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Inspection and documentation of stator leads and lugs
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286T & smaller: Bearing housing visual and fit test. Shaft journals – visual
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300 Series & larger: Mic and record all bearing housing & shaft journals
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Digitally photograph condition (as required)
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Core test stator 400 series and larger**
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Estimate
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Test and record winding & bearing temp limiting device(s)**
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Steaming of end belts and all components
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Thermostatically controlled char oven cycle
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Record and strip existing winding
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Glass bead cleaning of stator core
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Stator confirmation core test
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Stator rewind
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Class H (180° C) materials
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Pulse shield inverter duty wire (as applicable)
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Test stator windings (surge and high potential)
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Stator/winding immersion Class N (200° C) solvent-less polyester resin
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Thermostatically controlled oven cure stator
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Dynamic balance of rotor and (as required) external fan(s) 300 series & larger**
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Assemble complete unit
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Meggar, test run & documentation results
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Vibration report on 300 series & larger**
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Paint
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Block shaft Non Nema frames & Babbit bearings**
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Prepare for shipping as required
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It is recommended that vibration monitoring occur on site after installation of motor**
**Recommended procedure at additional cost.
All work performed to ISO 9001:2000 Quality Assurance Standards.
Optional Procedures:
Inspection & certification for CSA approved explosion proof motors.
