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Zero-Footprint Three-Phase Oil-Immersed Submersible Underground Transformer
Oil-Immersed Transformer

Zero-Footprint Three-Phase Oil-Immersed Submersible Underground Transformer

Zero-occupancy three-phase oil-immersed underground transformer is a type of compact distribution power equipment designed for underground installation, featuring fully sealed oil-immersed construction, three-phase power conversion, and maintenance-free unattended operation. It is engineered to be installed directly below ground level or in underground pits, providing power distribution solutions for urban areas and space-constrained environments without occupying surface land.

Key Design Features

Fully Sealed Construction

  • Adopts high-grade sealing technology to effectively isolate underground moisture and corrosive media
  • Protection rating up to IP68, capable of continuous operation when fully submerged in water
  • Eliminates the need for a separate oil conservator tank; corrugated-fin radiators compensate for oil volume changes through elastic expansion and contraction
  • Vacuum oil impregnation removes air bubbles from windings for stable insulation performance

Zero-Occupancy / Maintenance-Free

  • No routine oil level checks, filter replacements, or on-site inspections required
  • Sealed design extends service life and eliminates regular maintenance intervals
  • Can be equipped with remote monitoring sensors for temperature, load, and power factor tracking
  • Built-in protective devices (fuses, load switches) provide autonomous fault protection

    pictures

     

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    Technical specifications

    screenshot-taken-on-august-27

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