This standard applies to dry-type power transformers (including auto-transformers) having values of highest voltage for equipment up to and including 36 kV. The following small and special dry-type transformers are not covered by this standard: — single-phase transformers rated at less than 1 kVA and polyphase transformers rated at less than 5 kV A; — instrument transformers (covered by IEC Publications 185: Current Transformers, and 186: Voltage Transformers); — transformers for static convertors (covered by IE C Publications 84: Recommendations for Mercury-arc Convertors, 119: Recommendations for Polycrystalline Semiconductor Rectifier Stacks and Equipment, and 146: Semiconductor Convertors); — starting transformers; — testing transformers; — traction transformers mounted on rolling stock; — flameproof and mining transformers; — welding transformers; — voltage regulating transformers; — small power transformers in which safety is a special consideration. Where IEC standards do not exist for the transformers mentioned above or for other special transformers, this standard may be applicable as a whole or in parts. With the publication of this standard, the requirements of IEC Publication 76 apply to dry-type transformers only in so far as they are referred to in this standard. Where reference is made to specific clauses and sub-clauses of various parts of IEC Publication 76, it is to be understood that the editions are as follows: 76-1, 76-2, 76-4, 76-5: 1976. 76-3: 1980.
SIS SS 427 01 29-1991由SE-SIS 发布于 1991-12-04。
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