GB 24790-2009
Minimum allowable values of energy efficiency and the energy efficiency grades for power transformers (English Version)

Standard No.

GB 24790-2009

Language

Chinese, Available in English version

Release Date

2009

Published By

General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China

Status

Be replaced 2021-06

Replace By

GB 20052-2020

Latest

GB 20052-2020

Scope

This standard specifies the allowable value of energy efficiency, target allowable value of energy efficiency, evaluation value of energy saving, energy efficiency grade and test method for power transformers. This standard applies to three-phase oil-immersed power transformers with a rated frequency of 50Hz, a voltage level of 35kV~220kV, and a rated capacity of 3150kV•A and above. This standard does not apply to dry-type transformers, high-impedance transformers and gas-filled transformers.

GB 24790-2009 Referenced Document

• GB 1094.1-1996 Power transformers. Part 1: General
• GB/T 2900.15-1997 Electrotechnical terminology. Transformer, instrument transformer, voltage regulator and reactor
• GB/T 6451-2008 Specification and technical requirements for oil-immersed power transformers

GB 24790-2009 history

• 2020 GB 20052-2020 Minimum allowable values of energy efficiency and the energy efficiency grades for power transformers
• 2009 GB 24790-2009 Minimum allowable values of energy efficiency and the energy efficiency grades for power transformers

GB 24790-2009 Minimum allowable values of energy efficiency and the energy efficiency grades for power transformers was changed to GB 20052-2020 Minimum allowable values of energy efficiency and the energy efficiency grades for power transformers.