After over 30 years of innovation, we have formed a full series of Dry-Type transformer product lines, including SC to SCBH19 iterative models, as well as new energy equipment such as 1,500V energy storage systems. 
Prefabricated substations are fully functional, reliable, with low investment, small footprint, and easy installation; they have good safety and a wide range of enclosure types.
In 1999, the company was the first in China to introduce the complete set of the most advanced design, process and manufacturing technology from GE in the United States, and successfully developed pad-mounted transformers with a compact structure and small size.
Liquid-immersed transformers utilize a highly stable insulating liquid medium, and achieve efficient power transmission through electromagnetic induction between the iron core and windings.
Since the early 1990s, relying on the “Guangdong Provincial Urban Network Electrical Equipment Engineering Technology Development Center”, SUNTEN has developed and researched resin-insulated dry-type air-core reactors and dry-type iron core reactors. 
In the late 1990s, SUNTEN developed an automatic tuning arc suppression coil grounding complete set that integrates primary high-voltage equipment and secondary control equipment. 
Since 2002, SUNTEN has been producing complete switchgear sets, with products covering the full range of 400V-40.5kV/400A-6300A, and having authorized cabinet models of Schneider MVnex+BlokSeT and ABB MDmax.
SUNTEN (founded in 1988) is a leading enterprise in the field of power transmission and distribution, as well as new energy equipment, with core technologies in areas such as thermal power frequency regulation energy storage, wind-solar-storage integration, and industrial and commercial energy storage.
Rail transit requires efficient, energy-saving, safe and reliable power solutions to ensure the safe and punctual operation of trains, while adopting energy-saving designs to reduce energy consumption and support the construction of green and intelligent transportation.
Nuclear power plants have extremely high safety requirements for electrical equipment, which must be certified to 1E level to ensure stable operation under extreme conditions, and employ efficient and energy-saving designs to guarantee the safe and efficient operation of nuclear power plants.
Data centers provide secure and reliable data storage and efficient computing to support the application of technologies such as cloud computing and artificial intelligence.
The renewable energy sector such as photovoltaics requires stable power solutions to improve generation efficiency, enhance equipment environmental adaptability, and adopt energy-saving designs to reduce energy consumption, driving the green energy transition.
SUNTEN delivers wind power-optimized transformers and substations, backed by 35 years of R&D expertise, ensuring all-weather reliability and full lifecycle support for stable renewable energy operations.
Industrial and commercial power distribution requires efficient, energy-saving, highly reliable and stable power solutions to meet the requirements of continuous operation and various special industrial and commercial environments.
Power plant generators require low-harmonic distortion excitation transformers that can adapt to frequent load changes and handle short-term overloads, ensuring the reliable and stable operation of the excitation system.
In the context of the accelerating energy structure transformation, electrochemical energy storage technology, with its high energy density, fast response, and multi-scenario adaptability, has become a core engine for building a new power system. 
As an “offshore oil and gas factory” that integrates production, oil storage, and offloading functions, FPSO’s electrical system needs to meet the stable power supply requirements in the complex marine environment, serving as the core infrastructure supporting oil and gas processing, power supply, and life support.
LNG carriers require efficient and safe power solutions to support the liquefaction, transportation, and storage of natural gas, ensuring the safety and efficiency of energy transportation.
Commercial centers have stringent safety requirements for electrical equipment, necessitating highly reliable and stable power solutions, along with efficient and energy-saving designs, to ensure the normal and efficient operation of the facilities.
Airports demand high fire resistance performance, reliability, and robust short-circuit and short-term overload capabilities for their electrical equipment. By utilizing high-efficiency products, we enable low-carbon operations.
Leveraging its patented technologies and professional team, SUNTEN provides customized solutions for power distribution, photovoltaic, and energy storage systems.
In 1999, SUNTEN undertook a major national “Ninth Five-Year Plan” research project, developing a single-phase epoxy-cast dry-type excitation transformer suitable for the Three Gorges Hydropower Station, filling a technological gap in China.
Sunten Electric Equipment Co., Ltd. is a Sino-foreign joint venture established by Sunten Electric Co., Ltd. (formerly Shunde Special Transformer Factory) and French Schneider Electric. The company was founded in 1988. 
Established in 1988, through over three decades of steady development, the company has grown into a modern enterprise with a site area of 120,000 square meters and a total building area of 124,000 square meters, with a registered capital of RMB 1.09 billion. 
Learn more about SUNTEN's recent news.
From the ISO management system to industry-specific certifications, SUNTEN consistently exceeds international standards, establishing a comprehensive qualification matrix spanning R&D, production, and service operations.
2024
Awarded the prestigious “Gold Medal” rating by EcoVadis, the globally recognized authority in sustainability assessments.
2010
SUNTEN and Schneider Electric jointly esatablished a Sino-foreign joint venture.
2001
Successfully developed China’s first nuclear island Class 1E dry-type transformer, and remains the sole enterprise in the industry to have completed full-scope aging life qualification-from winding prototypes to complete units.
1999
Successfully developed the Excitation Rectifier Transformer for the Three Gorges Hydropower Station (world’s largest hydroelectric facility), achieving a technological breakthrough in China.
1989
Successfully developed China’s first epoxy resin cast thin-insulation dry-type transformer, ushering in the mass production era for dry-type transformer in China.
2023
The new energy storage technology research and development has been successfully completed and has achieved market breakthrough, driving implementation of the dual carbon strategy through integrated technology-to-product solutions.
2005
First in the dry-type transformer sector to obtain National Accredited Laboratory status, with mutual recognized of test results across over 20 global laboratories.
2001
Authorized to establish a Postdoctoral Research Workstation (Approved by the State Personnel Board).
1995
Certified to ISO 9001 by the Hong Kong Quality Assurance Agency (HKQAA) and the British Standards Institution (BSI).
1988
Founded Shunde Special Transformer Factory, entering China’s emerging dry-type transformer sector.
2024
Awarded the prestigious “Gold Medal” rating by EcoVadis, the globally recognized authority in sustainability assessments.
2023
The new energy storage technology research and development has been successfully completed and has achieved market breakthrough, driving implementation of the dual carbon strategy through integrated technology-to-product solutions.
2010
SUNTEN and Schneider Electric jointly esatablished a Sino-foreign joint venture.
2005
First in the dry-type transformer sector to obtain National Accredited Laboratory status, with mutual recognized of test results across over 20 global laboratories.
2001
Successfully developed China’s first nuclear island Class 1E dry-type transformer, and remains the sole enterprise in the industry to have completed full-scope aging life qualification-from winding prototypes to complete units.
2001
Authorized to establish a Postdoctoral Research Workstation (Approved by the State Personnel Board).
1999
Successfully developed the Excitation Rectifier Transformer for the Three Gorges Hydropower Station (world’s largest hydroelectric facility), achieving a technological breakthrough in China.
1995
Certified to ISO 9001 by the Hong Kong Quality Assurance Agency (HKQAA) and the British Standards Institution (BSI).
1989
Successfully developed China’s first epoxy resin cast thin-insulation dry-type transformer, ushering in the mass production era for dry-type transformer in China.
1988
Founded Shunde Special Transformer Factory, entering China’s emerging dry-type transformer sector.