1 Scope
This standard specifies the energy efficiency grades, minimum allowable values of energy efficiency, evaluating values of energy conservation and test methods of three-phase distribution transformers.
This standard is applicable to three-phase, oil-immersed distribution transformers with 10 kV voltage grade, off-circuit-tap-changing, rated capacity of 30 kVA to 1600 kVA, and dry-type distribution transformer with rated capacity of 30 kVA to 2500 kVA.
This standard is not applicable to inflatable transformers.
2 Normative References
The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB 1094.1 Power transformers — Part 1: General
GB 1094.11 Power transformers — Part 11: Dry-type transformers
GB/T 2900.15 Electrotechnical terminology — Transformer, instrument transformer, voltage regulator and reactor
GB/T 6451 Specification and technical requirements for oil-immersed power transformers
GB/T 10228 Specification and technical requirements for dry-type power transformers
GB/T 22072 Specifications and technical requirements for dry-type amorphous alloy core distribution transformers
GB/T 25446 Specification and technical requirements for oil-immersed amorphous alloy core distribution transformers
GB/T 25438
Specification and technical requirements for three-phase oil-immersed tridimensional toroidal-core distribution transformers
