Huludao Zhongdian Electric Power Equipment Co., Ltd. is a key high-tech enterprise in China, established in October 1969. As one of Liaoning Province’s key enterprises, the company has been in operation for 53 years. With total assets of 266.96 million yuan and covering an area of 100,000 square meters, the company employs over 300 staff members. Its annual production capacity is 12 million kVA, with annual revenue exceeding 100 million yuan.
The company is the fourth in China to manufacture 220kV power transformers, contributing significantly to the construction, operation, and maintenance of the power grid. It has provided over 3,500 power transformers rated 66kV and above, totaling approximately 315,000 MVA. Within Liaoning Province, its 220kV transformers account for 52% of operations, and its products are also exported to 21 provinces, cities, and autonomous regions, including Hainan, Sichuan, Ningxia, Qinghai, Fujian, Guizhou, Tibet, and Inner Mongolia, earning widespread trust and support from its customers.
The company occupies an area of 95,000 square meters, with 30,000 square meters dedicated to production buildings. Equipped with strong technical expertise, advanced equipment, and scientific management, the company produces a wide range of power transformers with voltage levels from 66kV to 220kV and capacities from 6,300 kVA to 240,000 kVA for on-load tap-changing transformers, as well as 630 kVA to 450,000 kVA for off-circuit tap-changing transformers. These transformers include single-phase, three-phase, double-winding, triple-winding, autotransformer, air-cooled, water-cooled, and self-cooled models. Additionally, the company manufactures silicon steel, amorphous alloy oil-immersed, dry-type distribution transformers, and box-type transformers with voltage ratings of 10kV to 35kV. It is also capable of manufacturing, upgrading, and servicing 500kV power transformers, and can undertake the construction of complete projects for units of 100MW and below, as well as 220kV and lower transmission lines and substations.
The company’s strong design and development capabilities are backed by high-level experts from both domestic and international backgrounds, forming a research and development team led by PhDs. The technical team consists of 48 personnel, including 3 professor-level senior engineers, 1 PhD, 12 senior engineers, and a workforce with 100% of employees holding a bachelor’s degree or higher.
With more than 400 general and specialized production equipment, including automated transformer core cutting lines, vertical winding machines, a 2,000-ton hot press, CNC steel plate cutting machines, a 480KW computer-controlled vapor phase drying system, and CNC insulation processing equipment, the company also boasts a high-voltage testing hall equipped with a 3,000kV lightning impulse test device and 500kV power frequency testing equipment. The hall also houses a 7,500kW power frequency generator set, winding characteristic testers, and harmonic analyzers. These advanced facilities ensure that accurate and reliable test data can be provided according to IEC standards.
