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Insulation Resistance Test on a Transformer

Class 1 Transformer

Insulation resistance tests between each winding and earth

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 2 Transformer Symbol

Insulation Resistance Test Between Windings

Transformer Insulation Resistance Test

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