Insulation capacitance

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from the maintenance department...

Insulation capacitance

Posted by pk on 1 August, 2008 - 12:39 am

What will be the effect on the capacitance between the two live parts and ground if the insulation value increases or decreases?

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Posted by mph on 1 August, 2008 - 11:34 pm

Capacitance is proportional to the overlapping area of the conductors involved and the distance between them. Decreasing the insulation or gap between them increases the capacitance.

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Posted by pk on 6 August, 2008 - 11:57 pm

OK, I agree. But should I check resistance of a capacitor or capacitance? Because when we talk about the insulation resistance we check it with meggar. We never talk about insulation capacitance.

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Posted by Jim on 12 August, 2008 - 10:46 pm

You would check capacitance with a capacitance meter, or DMM that has that setting. You have to check capacitance on two wires running parallel that are not shorted together at any point.

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