IS 2772 : 1982 Non-flameproof mining transformers for use below ground

1 Scope

1.1 This standard covers requirements for single and three-phasenon-flameproof, mining type, oil-immersed transformers for usebelow ground.

Note - Single-phase transformers are normally used for lightingpurposes.

2 References

IS 2 :1960Rules for rounding off numerical values

IS 1885 : Part XXXVIII :1977 Electrotechnical vocabulary: Part XXXVIIITransformers

IS 2026 : Part I :1977Specification for power transformers: PartI General

IS 2026 : Part II :1977Specification for power transformers: PartII Temperature-rise

IS 2026 : Part III :1981 Specification forpower transformers: PartIII Insulation level and dielectric tests

IS 2026 : Part IV :1977Specification for power transformers: PartIV Terminal marking, tappings andconnections