Standard No.:	GB 24790-2009
Chinese Name:	电力变压器能效限定值及能效等级
English Name:	Minimum allowable values of energy efficiency and the energy efficiency grades for power transformers
Professional Classification:	F01 Technical management
Professional Classification:	GB National Standard
ICS Classification:	27.010
Issued by:
Issued on:	2009-12-15
Implemented on:	2010-07-01
Status:	VALID
Replace By:	GB20052-2020 Minimum allowable values of energy efficiency and the energy efficiency grades for power transformers
Replace By Date:	2021-06-01
Target Language:	English
File Format:	PDF
Word Count:	6000 words
Translation Price:	180 (USD)
Delivery:	via email in 1-3 business day

This standard specifies the minimum allowable values of energy efficiency, target minimum allowable values of energy efficiency, evaluating values of energy conservation, energy efficiency grade and test methods of power transformer.
This standard is applicable to the three-phase oil-immersed power transformers of 50Hz in rated frequency, 35kV ~220kV in voltage grade and 3150kV?A and more in rated capacity.
This standard is not applicable to the dry-type transformer, high impedance transformer and gas-filled type transformer.

下列文件中的条款通过本标准的引用而成为本标准的条款。凡是注日期的引用文件,其随后所有的修改单(不包括勘误的内容)或修订版均不适用于本标准,然而,鼓励根据本标准达成协议的各方研究是否可使用这些文件的最新版本。凡是不注日期的引用文件,其最新版本适用于本标准。
GB1094.1 电力变压器 第1部分:总则
GB/T2900.15 电工术语 变压器、互感器、调压器和电抗器
GB/T6451 油浸式电力变压器技术参数和要求