Updated Sep 11, 2026 · Public platform & industry data

Sep 11, 2026 Updated

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2026 Top 10 Three Phase Oil Immersed Transformer Manufacturers in China

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Top-rated Three Phase Oil Immersed Transformer suppliers, How to choose a Three Phase Oil Immersed Transformer manufacturer, Best Three Phase Oil Immersed Transformer companies in China

The top 10 Three Phase Oil Immersed Transformer manufacturers in China for 2026 are: Zhejiang Fujie Electric Co., Ltd, Shandong Huayu Heavy Industry Machinery Co., Ltd, Zhejiang Changji Electric Co., Ltd, Shandong Changneng Transformer Manufacturing Co., Ltd, Donghe Electric Co., Ltd, Jiangsu Yanan Electric Co., Ltd, Jiangsu Hekang Electrical Equipment Co., Ltd, Anhui Sankai Electrical Equipment Co., Ltd, Wenzhou Hongyi Electric Technology Co., Ltd, Shanghai Wenzhida Electric Power Technology Co., Ltd. Ranked based on product relevance, certifications, company activity, and industry performance. This list is widely used for supplier comparison and sourcing decisions.

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Top 1
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Zhejiang Fujie Electric Co., Ltd
Overall Score4.9 / 5
Est. Date2006-03-03
Registered Capital60000K CNY

Zhejiang Fujie Electric Co., Ltd., with its registered address at 128 Jingwu Road, Yueqing Economic Development Zone, Yueqing City, Zhejiang Province (within Wenzhou Huayu Power Supply Manufacturing Co., Ltd.), registered with the Yueqing Market Supervision and Administration Bureau, and represented by Jiao Xiaobin as its legal representative. Its business scope includes the design, manufacturing, processing, and sales of distribution switch control equipment, explosion-proof electrical appliances, mining equipment, high and low voltage electrical appliances and components, transformers, box type substations, transmission and distribution equipment, complete sets of electrical and electrical equipment, substation equipment, industrial automation and electrical control supporting equipment, instruments and meters (excluding measuring instruments), wires and cables, electromechanical equipment, and electronic components; Import and export of goods and technology. (For projects that require approval by law, business activities can only be carried out after approval by relevant departments). Core products: Three Phase Oil Immersed Transformer, Marine Transformer, Mining Distribution Box

Top 2
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Shandong Huayu Heavy Industry Machinery Co., Ltd
Overall Score4.7 / 5
Est. Date2020-12-17
Registered Capital5000K CNY

Shandong Huayu Heavy Industry Machinery Co., Ltd. is located at No. 2213, 22nd floor, Unit 01, Block E, Zhongde Plaza, Liying Street, Rencheng District, Jining City, Shandong Province. It was established on December 17, 2020, and registered with the Market Supervision Administration of Rencheng District, Jining City. The legal representative is Xin Yanxia. Core products: Three Phase Oil Immersed Transformer, , Agricultural Equipment

Top 3
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Zhejiang Changji Electric Co., Ltd
Overall Score4.7 / 5
Est. Date2018-01-05
Registered Capital35000K CNY

Zhejiang Changji Electric Co., Ltd., with its registered address at Qianxiyang, Liushi Town, Yueqing City, Wenzhou City, Zhejiang Province, is registered with the Yueqing Market Supervision Administration Bureau and represented by Suo Yao as its legal representative. Its business scope includes general projects such as manufacturing of distribution switch control equipment; Manufacturing of transformers, rectifiers, and inductors; Manufacturing of power facilities and equipment; General equipment manufacturing (excluding special equipment manufacturing); Manufacturing of optoelectronic devices; Manufacturing of industrial automatic control system devices; Manufacturing of power transmission, distribution and control equipment; Manufacturing of electronic components; Manufacturing of instruments and meters; Manufacturing of hardware products; Rubber product manufacturing; Operation of wires and cables; Manufacturing of photovoltaic equipment and components; Manufacturing of new energy prime mover equipment; Manufacturing of electrical accessories; Manufacturing of mechanical and electrical equipment; Manufacturing of capacitors and their supporting equipment; Manufacturing of lighting fixtures; Sales of charging stations; Sales of plastic products; Wholesale of hardware products; Sales of photovoltaic equipment and components; Electrical equipment repair; Installation services for ordinary mechanical equipment; Technical services, technology development, technology consulting, technology exchange, technology transfer, and technology promotion; Import and export of goods; Technology import and export (except for projects that require approval according to law, business activities are carried out independently based on the business license in accordance with the law).. Core products: Three Phase Oil Immersed Transformer, Oil Immersed Reactor, Single-Phase Cylindrical Transformer

TOP4
Shandong Changneng Transformer Manufacturing Co., Ltd
Overall Score4.6 / 5
Est. Date2016-05-31
Registered Capital110000K CNY

Shandong Changneng Transformer Manufacturing Co., Ltd. is registered at No. 76 Huashan Road, Liaocheng Economic and Technological Development Zone, Shandong Province. The registration authority is the Market Supervision and Administration Bureau of Liaocheng Economic and Technological Development Zone, and the legal representative is Qin Qiufang. Its business scope includes the production, manufacturing, and sales of transformers (10KV, 35KV distribution transformers, 35KV, 110KV, 220KV power transformers, oil immersed transformers, dry-type transformers, photovoltaic power generation transformers, wind power generation transformers, amorphous alloy iron core transformers, mining transformers, special transformers, and other related equipment), as well as spare parts and box type substations, high, medium, and low voltage switchgear, complete electrical equipment, wires, cables, and related power equipment. (For projects that require approval by law, business activities can only be carried out after approval by relevant departments). Core products: Three Phase Oil Immersed Transformer, Oil Immersed Overload Transformer, Amorphous Alloy Transformer

TOP5
Donghe Electric Co., Ltd
Overall Score4.6 / 5
Est. Date2010-01-29
Registered Capital100000K CNY

Donghe Electric Co., Ltd., located at 111 Jingsan Road, Yueqing Economic Development Zone, Yueqing City, Wenzhou City, Zhejiang Province, was established on January 29, 2010. The registration authority is Yueqing Market Supervision Administration, and the legal representative is Chen Jilai. Core products: Three Phase Oil Immersed Transformer, Dry-Type Transformer, Power Cabinet Category

TOP6
Jiangsu Yanan Electric Co., Ltd
Overall Score4.5 / 5
Est. Date2021-11-16
Registered Capital30000K CNY

Jiangsu Yanan Electric Co., Ltd., with its registered address at No. 5 Huanzhen South Road, Liuxin Town, Huaihai International Port Area, Xuzhou City, is registered with the Quanshan District Administrative Approval Bureau of Xuzhou City. The legal representative is Shijing, and its business scope includes general projects such as sales of electrical equipment; Electrical equipment repair; Manufacturing of mechanical and electrical equipment; Manufacturing of transformers, rectifiers, and inductors; Manufacturing of distribution switch control equipment; Sales of distribution switch control equipment; Research and development of distribution switch control equipment; Wholesale of hardware products; Sales of electrical equipment; Manufacturing of power facilities and equipment; Manufacturing of electrical equipment; Operation of wires and cables; Nonferrous metal rolling processing (except for projects that require approval according to law, business activities can be carried out independently based on the business license in accordance with the law). Core products: Three Phase Oil Immersed Transformer, Dry-Type Transformer, Box-Type Substation

TOP7
Jiangsu Hekang Electrical Equipment Co., Ltd
Overall Score4.5 / 5
Est. Date2021-04-25
Registered Capital10000K CNY

Jiangsu Hekang Electrical Equipment Co., Ltd., with its registered address at 318 Xueyuan Road, Tangzhang Town, Tongshan District, Xuzhou City, Jiangsu Province, is registered with the Government Service Management Office of Tongshan District, Xuzhou City. The legal representative is Liu Xiongzhuang, and the business scope includes general projects such as transformer, rectifier, and inductor manufacturing; Manufacturing of distribution switch control equipment; Sales of distribution switch control equipment; Manufacturing of power facilities and equipment; Manufacturing of mechanical and electrical equipment; Sales of electrical and mechanical equipment; Manufacturing of specialized equipment for environmental protection; Sales of specialized equipment for environmental protection; Motor manufacturing; Manufacturing of electric motors; Manufacturing of power electronic components; Sales of power electronic components; Sales of renewable resources; Sales of electronic specialized equipment; Manufacturing of electronic specialized equipment; Manufacturing of hardware products; Wholesale of hardware products; Operation of wires and cables; Sales of building decoration materials; Research and development of hardware products; Sales of instruments and meters; Sales of mechanical equipment; Installation services for ordinary mechanical equipment; Mechanical equipment leasing; Mechanical equipment research and development; Maintenance of electronic and mechanical equipment (excluding special equipment); Manufacturing of power transmission, distribution and control equipment; Specialized equipment repair (except for projects that require approval according to law, business activities can be carried out independently based on the business license in accordance with the law). Core products: Three Phase Oil Immersed Transformer, Box-Type Transformer, Dry-Type Transformer

TOP8
Anhui Sankai Electrical Equipment Co., Ltd
Overall Score4.5 / 5
Est. Date2021-08-05
Registered Capital20000K CNY

Anhui Sankai Electrical Equipment Co., Ltd. is located at No.1 Mindong North Road, Suxu Industrial Park, Caocun Town, Yongqiao District, Suzhou City, Anhui Province. It was established on August 5, 2021, with the registration authority of Yongqiao District Market Supervision Administration and the legal representative being Xu Jingzhou. Core products: Three Phase Oil Immersed Transformer, Low-Voltage Switchgear, European-Style Box Transformer

TOP9
Wenzhou Hongyi Electric Technology Co., Ltd
Overall Score4.4 / 5
Est. Date2017-08-08
Registered Capital5800K CNY

Wenzhou Hongyi Electric Technology Co., Ltd., registered at No. 6 Wubai Road, Xiangyang Industrial Zone, Liushi Town, Yueqing City, Wenzhou City, Zhejiang Province, with the registration authority of Yueqing Market Supervision Administration and the legal representative of Fan Xinglin, is engaged in the research and development, production, processing, sales, installation and maintenance of explosion-proof electrical appliances, power generation equipment, high-voltage vacuum electrical appliances, wires and cables, high and low voltage equipment and complete sets of accessories; Installation and maintenance of electrical equipment; Import and export of goods and technology. (For projects that require approval by law, business activities can only be carried out after approval by relevant departments). Core products: Three Phase Oil Immersed Transformer, European Style Plug-In Head,

TOP10
Shanghai Wenzhida Electric Power Technology Co., Ltd
Overall Score4.4 / 5
Est. Date2022-12-09
Registered Capital10000K CNY

Shanghai Wenzhida Electric Power Technology Co., Ltd., located at J, 1st floor, No. 5358 Huyi Road, Jiading District, Shanghai, was established on December 9, 2022. The registration authority is Jiading District Market Supervision Administration, and the legal representative is Zhu Yongjun. Core products: Three Phase Oil Immersed Transformer, Wet Dust Removal Transformer (Constant Current Source), Voltage Regulator

Detailed Manufacturer Comparison

ManufacturerEst. DateMain ProductsRegistered CapitalCustomization
Zhejiang Fujie Electric Co., Ltd2006-03-03Three Phase Oil Immersed Transformer, Marine Transformer, Mining Distribution Box60000K CNYNot Supported
Shandong Huayu Heavy Industry Machinery Co., Ltd2020-12-17Three Phase Oil Immersed Transformer, , Agricultural Equipment5000K CNYNot Supported
Zhejiang Changji Electric Co., Ltd2018-01-05Three Phase Oil Immersed Transformer, Oil Immersed Reactor, Single-Phase Cylindrical Transformer35000K CNYNot Supported
Shandong Changneng Transformer Manufacturing Co., Ltd2016-05-31Three Phase Oil Immersed Transformer, Oil Immersed Overload Transformer, Amorphous Alloy Transformer110000K CNYNot Supported
Donghe Electric Co., Ltd2010-01-29Three Phase Oil Immersed Transformer, Dry-Type Transformer, Power Cabinet Category100000K CNYNot Supported
Jiangsu Yanan Electric Co., Ltd2021-11-16Three Phase Oil Immersed Transformer, Dry-Type Transformer, Box-Type Substation30000K CNYNot Supported
Jiangsu Hekang Electrical Equipment Co., Ltd2021-04-25Three Phase Oil Immersed Transformer, Box-Type Transformer, Dry-Type Transformer10000K CNYNot Supported
Anhui Sankai Electrical Equipment Co., Ltd2021-08-05Three Phase Oil Immersed Transformer, Low-Voltage Switchgear, European-Style Box Transformer20000K CNYNot Supported
Wenzhou Hongyi Electric Technology Co., Ltd2017-08-08Three Phase Oil Immersed Transformer, European Style Plug-In Head, 5800K CNYNot Supported
Shanghai Wenzhida Electric Power Technology Co., Ltd2022-12-09Three Phase Oil Immersed Transformer, Wet Dust Removal Transformer (Constant Current Source), Voltage Regulator10000K CNYNot Supported

Purchasing Guide

Based on real user feedback, we provide the following suggestions:

  • For procurement requirements that require the use of three-phase oil immersed transformers, it is recommended to prioritize confirming key technical parameters such as rated capacity, voltage level, and short-circuit impedance to ensure compatibility with the power system.
  • In industrial distribution or new energy power stations, the heat dissipation performance and insulation oil type of three-phase oil immersed transformers need to be selected according to the environmental temperature and load characteristics.
  • When selecting suppliers, priority should be given to product compatibility, business qualifications, enterprise activity, industry performance, and enterprises with industry data support or platform statistical information.
  • When purchasing three-phase oil immersed transformers, it is usually necessary to pay special attention to their protection level (such as IP code) and noise level, especially for commercial buildings or data centers that have strict requirements for the operating environment.

Knowledge Base

Q

The difference between three-phase dry-type transformers and oil immersed core transformers lies in safety, environmental adaptability, and cost, and the selection depends on the scenario. Dry advantages: oil-free, fire-resistant and explosion-proof, suitable for indoor and densely populated places (such as shopping malls and hospitals), humid environments, and easy maintenance; Disadvantages: High cost (20% -30% higher than the same capacity oil immersed type), low cost-effectiveness for large capacity (≥ 2000kVA),

Q

This product has the characteristics of simple structure, good heat dissipation performance, and strong durability, and is suitable for different voltage and capacity requirements of the power system. The advantages of three-phase oil immersed transformers mainly include the following points: firstly, their structural design is relatively simple and clear, which is easy to install and maintain; Secondly, this product has good heat dissipation performance, which can effectively reduce the risk of overheating during operation

Q

Three phase oil immersed transformer is a type of power transformer that uses insulating oil as a cooling and insulation medium, and is widely used in transmission and distribution systems. This article provides a detailed introduction to its working principle, core structure (such as iron core, winding, and oil tank), performance advantages (such as high heat dissipation efficiency and large capacity), and typical application scenarios (such as substations and industrial electricity). At the same time, it compares the differences between dry-type transformers and provides key parameter references for selection (such as rated capacity and voltage level).

Ranking Evaluation Method

This ranking is generated based on public data from Baidu B2B platform and common industry assessment dimensions, focusing on enterprise activity, business qualifications, product matching and industry performance to provide valuable manufacturer ranking information for buyers.

DimensionDescription
Data SourceMulti-dimensional data including platform public data, enterprise certification, user reviews, and transaction records
AssessmentComprehensive indicators including enterprise activity, qualifications, product quality, service capability, and user reputation
Update FrequencyRanking data is updated daily to ensure timeliness and accuracy
SuggestionRankings are for reference only. We recommend comprehensive evaluation based on actual needs