Endurandce test on transformer for class 313 E.M.U. (TM-DOS-022B)

The C.M. & E.E. Specification for Power Equipment is extremely difficult to apply to a sealed transformer where the identification and measurement of internal resonances are virtually impossible. The Specification is based on I.E.C, Recommendation No.77 which is over ten years old and consequently takes no account of the improved...