Insulation Resistance Test on a Transformer

Class 1 Transformer

Insulation resistance tests between each winding and earth

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Transformer Insulation Resistance Test

 

Insulation resistance test between windings

Transformer Insulation Resistance Test

The minimum insulation resistance value accepted in each of the above tests is 2M. A 500V Insulation Resistance Test is suitable for 110 – 400 Volt transformers.

Class 2 Transformer

Double Insulated Symbol Class Two Transformer Symbol

Insulation Resistance Test Between Windings

 

Transformer Insulation Resistance Test

 

The minimum insulation resistance value accepted in the test is 2 M.