what voltage to be select in megger for insulation resistance testing to L.V ,

what voltage to be select in megger for insulation
resistance testing to L.V , H.T cables,motors and
transfomer?and ohms valve should be giga ohms only or what?

Question Posted / fmcool75

what voltage to be select in megger for insulation resistance testing to L.V , H.T cables,motors a..

Answer / guest

You must know what is the voltage of your installation or
the cable. Eg. if its used for 230 v. Then you can use 250V
Megger or even 500V megger. For 440V application or cables
use 500V or 1000v megger.
For HT cables 3.3kv and above you can use 5kv megger.
Ohms value will come according to the reading. If reading
is in Megaohms or Gigaohms it will appear on the scale or
change tapping accordingly if any.

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