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What is the minimum permissive IR value for LT & HT motor for safe starting?
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Answer Posted / vinoth
IR means Insulation Resistance. basically IR value need is ( Rated KV+1 ) Mohm.
For eg if motor rated voltage is 11Kv then we need IR value has 12Mohm.
Minimum 1Mohm is sufficient to start LT motors.
For HT Motor- ( Rated KV +1)Mohm
it is very suffient to start motors
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