- May 2013
Sieyuan Electric acquired the Business Qualification for Foreign Contracted Projects, which had historic significance on overseas business development and international market competitiveness of Sieyuan Electric.
- December 2012
The Intelligent Combination Equipment (GIS) and Key Components Industrialization Project invested (1 billion yuan) by Jiangsu Juyuan Electric Co., Ltd. was officially opened in Power Electronics Equipment Industrial Park, Rugao Economic Development Zone.
- December 2011
The UHV Electrical Equipment developed by Sieyuan Electric was successfully applied to the 1000 kV UHV AC Power Transmission and Transformation Project of State Grid Corporation of China. From then on, products of Sieyuan Electric achieved the 1000 kV level.
- November 2011
Shanghai Sieyuan Energy Storage Technology Engineering Co., Ltd. was established, through which, Sieyuan Electric formally stepped into the area of large capacity energy storage products and distributed generation products.
- April 2011
Sieyuan Electric 1st Branch established the Smart Grid Technology and Research Center.
- September 2009
Shanghai Sieyuan Transmission and Distribution Engineering Co., Ltd. was established to carry out overseas equipment export and total package business.
- February 2009
Shanghai Sieyuan Hongrui Automation Co., Ltd. was built, through which Sieyuan Electric was involved in relay protection and intelligent substation.
- June 2008
Sieyuan Electric was approved by the Ministry of Human Resources and Social Security to set up a post-doctoral scientific research workstation.
- February 2008
Sieyuan Qingneng Power Electronic Co., Ltd. was founded, through which Sieyuan Electric approached to the application of high-power power electronics technology in power system.
- October 2007
Shanghai Science and Technology Commission approved the establishment of High-voltage Electrical Engineering Technology Research Center of Shanghai with Sieyuan Electric as the supporting institution, marking the R&D capacity of high-voltage electrical apparatus of Sieyuan Electric has achieved domestic leading level.
- June 2007
Shanghai Sieyuan High Voltage Switchgear Co., Ltd. was established, through which Sieyuan Electric stepped into the field of GIS production.
- December 2006
The Company was renamed as Sieyuan Electric Co., Ltd.
- November 2004
Shanghai Sieyuan Power Capacitor Co., Ltd. was founded, through which Sieyuan Electric entered into the field of power capacitor products.
- August 2004
Jiangsu Sieyuan Hertz Instrument Transformer Co., Ltd. was established, committing to the R&D and manufacturing of headstand type current transformer, making Sieyuan Electric one of the domestic leading companies in transformer industry.
- August 2004
Sieyuan Electric went into public in Shenzhen Stock Exchange (stock code: 002028), through which Sieyuan Electric entered into a new round of rapid development.
- December 2002
Shanghai Sieyuan Electric Co., Ltd. bought Jiangsu Rugao High Voltage Electric Apparatus Factory which was re-organized to Jiangsu Rugao High Voltage Electric Apparatus Co., Ltd.
- September 1998
The first set of variable frequency resonant pressure test system was successfully developed in China, making Sieyuan Electric one of the domestic leading companies of electric power industry.
- October 1996
Successful launch XHK - type complete set of Automatic Tuning Arc Suppression Coil and Grounding Line Selection Device, through which Sieyuan Electric formally entered into the electric power operation equipment manufacture industry.
- March 1994
The first arrester online monitor made in China was developed and passed the verification, through which Sieyuan Electric began providing operation monitoring equipment for Grid clients.
- December 1993
Shanghai Sieyuan Electric Co., Ltd. was founded in Shanghai Jiaotong University.