Zhejiang Jiangshan Hengli Electrical Co., Ltd. is one of the leading manufacturers and suppliers of hermetically sealed distribution transformer in China. If you're going to wholesale durable hermetically sealed distribution transformer made in China, welcome to get pricelist from our factory. All customized products are with high quality and low price.
Our 400kVA hermetically sealed distribution transformer stands as a reliable powerhouse for low and medium voltage power distribution projects across commercial, industrial, residential and outdoor utility scenarios. Boasting a standard rated capacity of 400kVA, this unit is tailored to convert the incoming 11kV high primary voltage down to 0.415kV secondary low voltage, perfectly matching the daily power supply demands of most industrial equipment, building electrical systems and public power grid facilities.
Different from conventional transformers fitted with an oil conservator, this 400kVA model adopts a full hermetically sealed structural design with no conservator installed at all. In actual field operation, this design creates a fully enclosed internal space for the transformer insulating oil. It thoroughly cuts off direct contact between internal oil and external air, as well as blocking the exposure to strong sunlight that often happens in outdoor installation environments.
Technical Parameter Table
|
Item |
Technical Specification |
|
Rated Capacity |
400 KVA |
|
Primary Rated Voltage |
11kV |
|
Secondary Rated Voltage |
0.415kV |
|
Transformer Type |
Hermetically Sealed Oil-filled Distribution Transformer |
|
Voltage Ratio |
11kV / 0.415kV (Step-down) |
|
Frequency |
50Hz/60Hz Customizable |
|
Cooling Method |
ONAN |
|
Insulation Level |
Medium voltage standard grade |
|
No-load Loss |
Low energy consumption customized option available |
|
Load Loss |
Optimized low loss design |
|
Installation Environment |
Indoor / Outdoor rainproof installation |
|
Sealing Structure |
Full hermetic seal, no oil conservator |
|
Core Material |
High-grade cold rolled silicon steel sheet |
|
Winding Material |
Copper winding (aluminum winding optional) |
Scope of Supply
Hermetically Sealed Distribution Transformer
Rated Power: Up to 5000 KVA
Primary Voltage: Up to 35 KV
Standard accessories (bushings, conservator optional, thermometer, etc.)
Test reports and technical documentation
Customization Options
We provide tailored transformer solutions based on your project:
Voltage ratio customization (HV/LV)
Copper or aluminum winding options
Special loss requirements (low loss / eco design)
Tap changer (off-load / on-load)
Anti-corrosion or special environmental design
Compact or lightweight structure
Key advantages of Hermetically Sealed Distribution Transformer
Without a conservator, the fully sealed structure isolates transformer oil from air and sunlight. It prevents oil dampness and oxidation, slows insulation aging, needs far less routine maintenance, and works stably in humid, dusty outdoor environments for years.In real application feedback from our global clients, this design can notably extend the overall service cycle of the transformer, while also cutting down daily maintenance frequency and long-term after-use operational costs, bringing tangible cost-saving benefits for end users.
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