IECstandard 50/60Hz three phase Cast Resin Dry type Transformer

Vacuum cast coil dry-type transformers are moisture-proof, suitable for operation in very humid or heavily polluted environments. For this technology, the encapsulation process for high voltage winding ensures optimum insulation and mechanical characteristics, and provides for high reliability during operation.

The transformers have the following characteristics:

Windings have high mechanical strength and less partial discharge.

Epoxy resin and insulating materials used for windings are non-flammable, will not burn from an electric arc, and no toxic gases will be given off when the resin is burned.

Envionmental adaptability with windings that will not absorb moisture and a special anti-rust protective coating that seals the core and frame.

Operates under one-hundred percent relative humidity and other severe ambient conditions.

Ability to switch on the device without pre-drying or long periods of service interruptions.

Excellent short-circuit and lighting impulse strength.

Cooled naturally by air (AN) and forced air cooling (AF) provided as an option to improve overload capacity.

Smaller dimensions, less weight, and space saving.

Oil drainage pits and fire extinguishing devices not required for operation.

Customized Designs:

To meet the needs of each unique application, specialized designs can be developed for our single phase, isolation, rectifier, and grounding transformers. In addition, customized tapping arrangements can also be provided.

Hunan Electric Union Corp. is a joint-stock enterprises established by Hua Xiang Xiang Neng Electric Power Co. Ltd., Huaxiang Power Transformer Co. Ltd., Hunan Xiang Neng Electric Power Automation Co., Ltd, and Hunan High Voltage Switchgear Co., Ltd . It is located in the China national high-tech Industrial Development Zone, ChangSha City, Hunan Province, and has two main manufacturing parks: Hua Xiang Xiang Neng in Yiyang City and Hunan High Voltage Switchgear in Changsha City.

In Yiyang, it covers 96,000 square meters, including building area 58,000 square meters, and also there are living area, office area, recreational area, a fully equipped facilities in the region. The leading products are 220KV class and below power transformer, 40.5kV and below high/low voltage switchgear. 40.5kV high and low voltage prefabricated substation, 12kV to 40.5kV cable branch box, outdoor switchgear station and so on.
In Changsha, It covers 220 acre of land. In 2009, It is invested 300 million RMB to construct the new-type and high precision electric transformation and transmission equipments' R&D Institute and manufacture factory. it mainly produce 72.5kV to 252kV GIS, 12kV to 252kV circuit breaker, 1100kV and below disconnector.

Hua Xiang Xiang Neng Electric Power Co. Ltd. has won the "brand-name products in Hunan province", "Hunan province's quality and credit grade AAA enterprise", "Hunan province Trustworthy Enterprises "," National quality inspection steady qualified product" and many other awards.
The company strict follows national standardized quality management system in the production process, and passed the ISO9001: 2008 quality system certification, ISO14001 environmental certification and GB/T 28001-2001 occupation health and safety management system certification, product standards are equivalent to the IEC standard. Company's standard management insures product quality and safe, truly provide customers with excellent quality products and services.


Hunan High Voltage Switchgear Co., Ltd is a large scale enterprise of developing and manufacturing the high voltage electric equipments. Established in 1950s, It has awarded as follows: The China electric Equipment Industrial Association Governing Units, The qualified supplier of State Grid and Southern Grid, the key-high tech enterprise of national torch plan and high tech enterprise of Hunan province. It has already passed the ISO9001, 2008 and PCCC quality system certification.
Over the fifty years, It has been adhered to the quality policy of All For The Customer and won the trust by the high quality products and perfect service.
All For Customer is the technology, quality and management. We aims to create the world first-class brand and become the largest professional electric equipment manufacturer in Asia.
We convinced that It can keep the pace with the times and attract the attention from the world.