HD 398.3 S1:1986

Power transformers - Part 3: Insulation levels and dielectric tests

Scope

Gives insulation requirements for power transformers and the corresponding insulation tests for specific windings and their terminals. Includes appendices on: partial discharge measurements during induced overvoltage withstand tests on transformers; overvoltage transferred from a high-voltage winding to a low-voltage winding; information to be supplied with enquiries and orders.