This webinar recording discusses the equalized connections found in an increasing number of factory windings, explains why they are used, and addresses whether or not they are needed when converting a concentric winding to a lap winding.

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Avoid using a slot liner with vacuum pressure impregnation (VPI) coils. The liner inhibits VPI penetration. If you have winders who are worried that they might damage the coil at the slot ends, have them cut “slot liner” about two inches long and just position them at the slot ends. 

Not only does a full-length slot liner make it more difficult for VPI to penetrate the coil, the slot liner also tends to flare slightly in vent ducts, restricting airflow.

• Treat all electrical circuits as though they were energized. Lock out controls and switches before beginning repairs or maintenance on any machine. 
• Allow only the person who placed the lock to remove it. Never begin work until all moving parts of the machinery have stopped in a fixed position. Make sure the machine is in a “zero mechanical state.”
• Special precautions are necessary in shutting down hydraulic or air-operated machinery. Check with your supervisor.