標準號：IS 2026 Pt.1-1977
發布日期：1977/8/1 12:00:00
實施日期：1999/12/31 12:00:00
適用范圍：1.1 This standard covers power transformers (including auto-transformers).1.2 This standard does not cover the following small and special purpose transformers:a) Single-phase transformers rated at less than 1 kVA and polyphase transformers rated at less than 5 kVA;b) Outdoor type three-phase distribution transformers up to and including 100 kVA, 11 kV ( covered by IS: 1180-1964||);c) Instrument transformers ( covered by IS: 2705‖ and IS : 3156** );d) Transformers for static convertors;e) Starting transformers;f) Testing transformers;g) Traction transformers mounted on rolling stock;h) Welding transformers f covered by IS: 1851-1966〓〓 and IS: 4804 (Part I)-196813〓〓];j ) Mining transformers [covered by IS:2772 ( Part I) - 1964*]; k ) Earthing transformers ( covered by IS : 3151-1965〓 ); m) X-ray transformers;n) Reactors (covered by IS: 5553〓); andp) Furnace type transformers.Note — Where Indian Standards do not exist for the transformers mentioned above, or for other special transformers, this standard may be applicable either as a whole or in part.