Measuring Insulation Resistance

When we measure insulation resistance of wiring, cables, motors, transformers, alternators etc. what is the standard reference temperature?. If we measure at a different temperature is there a table/chart to convert to a standard reference temperature(say,20 deg C)?

asked 7/4/2012

1 Answer

I'm a little bogged down at the moment to answer in too much depth.

The following online publication describes how to adjust for temperature:

There is also a rule of thumb for rotating machines that says "insulation resistance halves for 10 oC increase in temperature.

answered 7/30/2012 Steven McFadyen 232
Steven McFadyen
edited 7/30/2012
Steven McFadyen232
Steven McFadyen

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