GB 20052-2020
GB 20052-2020 Minimum allowable values of energy efficiency and the energy efficiency grades for power transformers
Abstract
This standard specifies the energy efficiency limits, energy efficiency grades, and test methods for three-phase power transformers.
This standard applies to three-phase oil-immersed distribution transformers with a voltage rating of 10 kV, non-excited voltage regulation, and a rated capacity of 30 kVA to 2,500 kVA, as well as dry-type distribution transformers with a rated capacity of 30 kVA to 2,500 kVA. The standard also applies to three-phase oil-immersed power transformers with a rated frequency of 50 Hz, a voltage rating of 35 kV to 500 kV, and a rated capacity of 3,150 kVA or more.
This standard does not apply to gas-insulated transformers or high-impedance transformers.
General Product Information
| Document Type | National standards |
|---|---|
| Standard Status | Replaced |
| Standard Code | GB 20052-2020 |
| CCS | Technical management |
| ICS | Integrated Energy and Heat Transfer Engineering |
| Implement Date | 2021-06-01 |