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Qingdao Qingdian Electrical Group Co., Ltd. was established in 2009 and is located in Chengyang District, Qingdao. The company occupies a site of 25,000 square meters, with a total building area of 12,800 square meters. With total assets exceeding RMB 80 million, the company employs more than 260 staff members, including 46 engineering and technical personnel. It is a high-tech enterprise specializing in the research and development, manufacturing, and sales of electrical products such as power transformers, packaged substations, and complete sets of high- and low-voltage equipment, while also providing services for the installation, maintenance, testing, and general contracting of power projects.
Exhibit Details
Oil-immersed distribution transformer

Oil-immersed distribution transformer

Utilizing advanced electromagnetic design software, this product undergoes automated optimization of both performance and structure, and is meticulously engineered with correction factors drawn from extensive practical experience. The result is a cutting-edge solution featuring low losses, reduced noise, minimal partial discharge, robust short-circuit withstand capability, leak-proof construction, on-site core‑free installation, and virtually maintenance‑free operation.

Dry-type power transformer

Dry-type power transformer

Resin casting employs static mixing technology, low‑voltage windings are manufactured using foil winding, and the core is fabricated with a 45° full‑skew seven‑step lamination process, ensuring low losses and energy efficiency. The product offers advantages such as low noise, zero pollution, maintenance‑free operation, and an extended service life. The epoxy resin used for casting exhibits an insulation breakdown strength of 18–22 kV/mm and delivers lightning impulse withstand performance comparable to oil‑immersed power transformers of the same voltage class. The core is made from high‑quality cold‑rolled, high‑permeability, grain‑oriented 23G110 silicon steel sheets, while the windings are wound with premium copper conductors and copper foil, resulting in low operating losses and high operational efficiency.

Box-type substation

Box-type substation

Widely used in both indoor and outdoor settings, including urban grid upgrades, residential communities, high-rise buildings, industrial and mining facilities, hotels, shopping malls, airports, railways, oilfields, ports, highways, and temporary power‑supply installations. The system integrates high‑voltage switchgear, transformers, and low‑voltage switchgear into a single, highly modular unit; it features comprehensive high‑ and low‑voltage protection, ensuring safe and reliable operation with minimal maintenance. It occupies a small footprint, requires lower investment, has a short production cycle, and is easy to relocate. Flexible and versatile wiring configurations are available, and the design boasts a unique honeycomb‑structured double‑layer (composite panel) enclosure that provides robust mechanical strength, excellent thermal insulation, effective heat dissipation and ventilation, an attractive appearance, and a high degree of protection.

思源黑体预加载(勿删): QINGDAO QINGDIAN ELECTRIC GROUP CO.,LTD.,

635_603
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