Hunan Hentg Power Electric Technology Co., Ltd.
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Product Specification
| High Light | 400KVA oil-immersed power transformer ，10/0.4KV low-loss distribution transformer ，durable oil-filled transformer with warranty | ||
The HENTG POWER 400kVA 10kV/0.4kV three-phase oil-immersed transformer (ONAN) is arranged for stable medium- to low-voltage operation. It remains steady during long-term outdoor use in environments with heat, airborne dust, and varying load conditions, offering consistent voltage output, reduced loss, and a sealed tank designed for durability.
Equipped with a cold-rolled silicon steel core, helping reduce no-load loss and supporting energy-efficient performance in long-term operation.
Multi-layer gasket system, strengthened tank joints, and fully welded construction minimize the risk of oil leakage in harsh outdoor environments.
ONAN cooling supports continuous operation under high temperature, ensuring stable output and reduced thermal stress on internal components.
The exterior tank features anti-corrosion coating, UV resistance, and dust-resistant structural design suitable for sand-exposed locations.
Copper windings, outdoor-grade bushings, and IEC-aligned insulation strength ensure long-term operational reliability.
| Parameter | Specification |
|---|---|
| Rated Capacity | 400 kVA |
| Phase | Three Phase |
| Frequency | 50 Hz / 60 Hz |
| Rated Voltage (HV) | 10 kV |
| Rated Voltage (LV) | 0.4 kV |
| Cooling Method | ONAN |
| Insulation Level | IEC Level |
| Vector Group | Dyn11 (optional) |
| Tap Changer | Off-circuit |
| Tap Range | ±2*2.5% |
| Winding Material | Copper |
| Core Material | Cold-rolled Silicon Steel |
| Insulating Oil | Mineral Oil |
| Tank Type | Sealed Type |
| Protection Class | Outdoor |
| Mounting Style | Ground Placement |
| Standard | IEC |
Regions with desert-style climates may face:
Dust accumulation around external areas
Faster gasket aging due to heat and sand
Higher chance of oil seepage at joint areas
Surface wear on tank walls
Multi-layer sealing layout enhancing joint tightness
Reinforced plates with full welding helping limit deformation
Dust-control breather reducing dust and moisture entry
Outdoor protective coating resisting UV and sand impact
Heat-resistant gasket materials extending sealing performance
These adaptations support long-term stability and help reduce oil-related risks in outdoor environments.
Suitable for a range of outdoor power-distribution surroundings, including:
Community and residential supply areas
Light-load operational zones
Rural and suburban distribution networks
Building-level supply arrangements
General medium- to low-voltage outdoor setups
Company Details
Business Type:
Manufacturer
Year Established:
2011
Total Annual:
300-500MVA
Employee Number:
200~250
Ecer Certification：
Verified Supplier
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