Dear all i am kumaravel. now in chennai. my work is control and relay panel auto cad designing.up to 11kv to 400kv then question is i am improving my knowledge. i want some books name and auther are available for this C&R panel related. plese any one help me

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why to use 50hz only in tansmisson and as well as in distribution why not60hz?

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WHY ARMAD USE IN CABLE

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what is the equation of insulating resistance of motor???

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Describe Non I.S. Earth System and why is it used?

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