IEC 60137:2008 specifies the characteristics and tests for insulated bushings. It is applicable to bushings, as defined in Clause 3, intended for use in electrical apparatus, machinery, transformers, switchgear, and installations for three-phase alternating current systems, with the highest voltage being above 1000 V and power frequencies ranging from 15 Hz up to and including 60 Hz.
Under special agreement between the purchaser and supplier, this standard may be applied, in part or as a whole, to the following:
• Bushings used in other than three-phase systems;
• Bushings for high-voltage direct current systems;
• Bushings for testing transformers;
• Bushings for capacitors.
Special requirements and tests for transformer bushings in this standard also apply to reactor bushings.
This standard applies to bushings made and sold separately. Bushings that are part of an apparatus and cannot be tested according to this standard should be tested with the apparatus they form part of.
