The insulation resistance test of alternator is very important. The IR test must be done in regular interval of minimum 6 month. Plus any time IR test may be needed to do if there are symptom of burning of stator.
Insulation resistance test method of alternator
So the main concept is to complete isolation of test subject. Synchronous alternator are mostly of star connected. First thing to disconnect the star connection and also disconnect the protective device or measurement device like CT, PT. Then we can continue to Insulation resistance of Alternator.
01. What is insulation resistance & how it is calculated.
02. Insulation resistance test- 9 safety tips to follow.