Answer / achal

Class 2 co-ordination?
As you have not clearly specified we assume it as Insulation Co-ordination hence Class 2 is the protection level (i.e. ability to withstand current capacity).

Answer / surajit mishra

Read the article by "Square D", an Electrical Company in the US. I am giving the link below.
http://static.schneider-electric.us/docs/Motor%20Control/0140PD9202A.pdf

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