HD 540.3 S1:1991

Insulation co-ordination - Part 3: Phase-to-phase insulation co-ordination - Principles, rules and application guide

Scope

This standard applies to equipment for three-phase a.c. systems with a highest voltage for equipment above 1 kV - It does not apply to equipment on which the different phases are separated by metal barriers - As Part 3 of IEC Publication 71: Insulation Co-ordination it covers phase-to-phase insulation