What is the recommended IR value for generator?

What is the recommended IR value for generator?  
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1 Answer

Answer :

Main generator is class B insulated machine. Without stator water recommended insulation value for the generator is R60 = kV + 1 MΩ

R60 – minimum recommended IR in MΩ of entire winding at 40°C of 60 Sec.

kV – rated voltage.

For the IR measurement 1 kV megger should be used. 
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