
With the acceleration of urban and rural modernization, urban construction has entered a stage aimed at improving street scenery and city appearance. Traditional box-type substations are haphazardly occupying prime locations in bustling cities, making them seem out of place with the beautiful urban environment. The requirements for electrical equipment in urban planning, highways, and public facilities are becoming increasingly high. In developed countries such as Europe, America, and Japan, transformers have gradually been buried underground according to urban ecological design concepts.
The underground box transformer is a newly designed power equipment developed to meet the requirements of the aforementioned fields. The underground box transformer mainly consists of an underground transformer and an advertising lightbox-type outdoor switchgear. The underground transformer is a new type of compact substation equipment that combines a transformer, high-voltage load switch, fuses, etc. It is installed in a pit, does not occupy surface space, and can operate submerged in water for a period of time. The advertising lightbox-type outdoor switchgear is a mixed structure that integrates an advertising billboard and outdoor switchgear, installed on the ground. The interior of the box contains outdoor high and low voltage distribution cabinets, with advertising lightboxes on both sides, providing a good visual effect.
The underground box transformer conforms to urban ecological design concepts, occupies a small area, beautifies the environment, and is suitable for places such as urban traffic main roads, residential communities, airports, stations, and highways. It will become a trend in the transformation of urban distribution network equipment.
Our Capability
Handan Bangyi Fastener Manufacturing Co., Ltd. has focused on the research and development of various fully threaded products since its establishment 14 years ago. The company is committed to providing high-quality, high-performance, and high-standard fully threaded products for customers with different needs. Currently, the company has more than 20 production and R&D personnel, over 50 sales and warehousing staff, two brand trademarks 'Tianxuan Full Thread' and 'Beidiao', and products that support customized production of various grades and surface treatments.
Equipment Scale:The company currently owns more than 110 thread rolling machines, 20 cutting machines, 8 disc pulling machines, and 2 surface treatment factories, ensuring the quality and speed of customized product production.
Daily Output:In recent years, the complete set of rolling equipment has been upgraded, with a daily output of over 120 tons, meeting large-scale production demands.
Inventory Reserve:To cope with the changing demands of the market, we maintain an inventory of over 2000 tons in all specifications year-round, ensuring timely and stable supply.
Independent Import and Export Rights:With years of export experience, our products are exported to dozens of countries and regions in Asia, the Middle East, Europe, and more.
Application Fields
High-quality fasteners are an important part of industry. If your industry requires wholesale fastener solutions, please feel free to contact us.

Combined transformer / Power transformer / Oil-immersed transformer
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