The running winding of a single phase motor on testing with meggar is found to be ground. Most probable location of the ground will be___________?
Correct answer: D. at the slot edge where coil enters or comes out of the slot
- A. at the end connections
- B. at the end terminals
- C. anywhere on the winding inside a slot
- D. at the slot edge where coil enters or comes out of the slot
Explanation
Mechanical vibration and electromagnetic forces can damage insulation where a coil enters or leaves a slot, making the slot edge the most probable ground location. End terminals and internal slot portions are less commonly exposed to this abrasion.
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