IS 11171-1985

标准号：IS 11171-1985
发布日期：1985/12/1 12:00:00
实施日期：1999/12/31 12:00:00
适用范围：1.1 This standard applies to dry-type power transformers ( including auto-transformers ) having values of highest voltage for equipment ( Um ) up to and including 36 kV.1.2 The following small and special dry-type transformers are not covered by this standard :a) Single-phase transformers rated at less than 1 kVA and polyphase transformers rated at less than 5 kVA,b) Instrument transformers ( see IS : 2705* and IS : 3156〓),c) Transformers for static convertors,d) Starting transformers,e) Testing transformers,f) Traction transformers mounted on rolling stock,g) Flameproof and mining transformers,h) Welding transformers ( see IS : 1851-1975〓 ), j) Voltage regulating transformers, andk) Small power transformers in which safety is a special consideration.