This Standard is formulated in accordance with the requirements of Document [2005] No. 739 issued by thegeneral office of National Development and Reform Commission - "Notice on Printing the Development andRevision Plan of Professional Standards in 2005".

This Standard is proposed by China Electricity Council.

This Standard is under the jurisdiction and explanation of the Standardization Technical Committee forHydraulic Hydrogenerator and Electrical Equipment of the Sector of Electric Power.

This Standard is prepared by Institute of Electrical Engineering of Chinese Academy of Sciences,Dongfang Electrical Machinery Co., Ltd., Harbin Electric Machinery Co., Ltd., Sinohydro Corporation,Lijiaxia Power Plant of Yellow River Hydropower Ltd.

Chief drafting staff: Gu Guobiao, Chang Zhenyan, Chen Xifang, Zheng Xiaokang, Liu Gongzhi, FuYuanchu, Wang Xiongbin, Li Shouzhi, Sun Tianhu, Zhang Dongsheng, Tian Xindong, Guo Jianhong, LiHongehun, Ruan Lin, Yuan Jiayi, Song Fuchuan. Translated and examined by Sinohydro Corporation: Fu Yuanchu, Tian Dongxin, Yuan Jiayi, Ruan Lin,Chen Jiansu, Jiang Shude, Li Shisen, Wang Jinting, Hu Jianwei, Liu Yongdong and Li Jingshuang.

Any question and suggestion is welcomed by the Standardizion Center of China Electricity Council （No. 12na lane, Baiguang Road, Beijing, 100761）.