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.

• High-Efficiency Low-Loss Core

  Equipped with a cold-rolled silicon steel core, helping reduce no-load loss and supporting energy-efficient performance in long-term operation.

  ● Reinforced Sealing Structure for Oil Containment

  Multi-layer gasket system, strengthened tank joints, and fully welded construction minimize the risk of oil leakage in harsh outdoor environments.

  ● Stable Temperature & Load Performance

  ONAN cooling supports continuous operation under high temperature, ensuring stable output and reduced thermal stress on internal components.

  ● Outdoor-Grade Protection for Harsh Climates

  The exterior tank features anti-corrosion coating, UV resistance, and dust-resistant structural design suitable for sand-exposed locations.

  ● Reliable Electrical Design

  Copper windings, outdoor-grade bushings, and IEC-aligned insulation strength ensure long-term operational reliability.

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