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500 kVA 13.8kV Three-Phase Oil-Immersed Distribution Transformer

This oil-immersed transformer is specified for Commercial and institutional buildings, industrial facilities, oil & gas, solar and wind energy. It runs ONAN (Oil Natural Air Natural) with Mineral oil insulation and 4.0% impedance. Built with Copper / Aluminium windings, High-efficiency (CRGO) silicon steel core, and ± 2 × 2.5% Off-Circuit Tap Changer (OCTC). Sound pressure stays at ≤ 60 dB at 1 meter; temperature rise is Top Oil ≤ 50K, Winding ≤ 55K (45°C Ambient). Enclosure: Hermetically sealed steel tank, weatherproof for indoor and. Built to order and verified against IEC 60076, BS 171, SON NIS, NERC Code as applicable to the order. Delivery is typically 30 days depending on quantity; two-year warranty; minimum order one set.

Technical Parameters & Ratings

IEC / ANSI CertifiedFactory Standard
Power Rating 500 kVA
Primary Voltage 13,800 V (13.8 kV)
Secondary Voltage 415 V / 240 V (3-Phase 4-Wire)
Phase Three-phase
Cooling Type ONAN (Oil Natural Air Natural)
Core Material High-efficiency (CRGO) silicon steel
Connection Group Dyn11
Winding Material Copper / Aluminium
Frequency 50 Hz
Insulation Mineral oil
Tap Changer ± 2 × 2.5% Off-Circuit Tap Changer (OCTC)
Short-circuit impedance 4.0%
Temperature Rise Top Oil ≤ 50K, Winding ≤ 55K (45°C Ambient)
Noise Level ≤ 60 dB at 1 meter
Enclosure Hermetically sealed steel tank, weatherproof for indoor and outdoor use
Altitude ≤ 1,000 m or customized
Ambient Temperature Range -30 °C to +50 °C
Accessories Conservator tank, oil level indicator, gas relay, pressure relief valve, etc.
Standards Compliance IEC 60076, BS 171, SON NIS, NERC Code
Applications Commercial and institutional buildings, industrial facilities, oil & gas, solar and wind energy
Transport & Installation Lifting lugs, skid base, galvanized fittings
Warranty Two years
Delivery Time Typically 30 days, depending on quantity
Min. order quantity ≥ 1 set

Technical Highlights

  • This product combines dependable transformer platform design, flexible project configuration, and practical export-oriented construction. It is suitable for applications requiring stable electrical performance, configurable voltage ratios, outdoor durability, and documentation support for international project supply.

Application Scenarios

  • Utility distribution networks
  • Industrial plants and workshops
  • Commercial buildings and mixed-use developments
  • Public infrastructure projects
  • Regional and municipal power distribution systems

Key Features

  • 500 kVA rated capacity for distribution network and industrial feeder applications
  • class design suitable for utility and regional power distribution systems
  • Oil-immersed structure for stable thermal performance and dependable outdoor operation
  • Available with copper or aluminum windings according to project and budget requirements
  • Supports IEC-based specifications and project-oriented voltage configuration
  • Configured for long service life, practical maintenance, and export project supply

Optional Configurations

  • Low-voltage side rating and voltage ratio
  • Frequency: 50 Hz or 60 Hz
  • Vector group and tapping range
  • Copper or aluminum winding
  • Cooling method, accessory package, and monitoring option
  • Tank structure, coating system, and special environmental adaptation
  • Color, nameplate language, and document package
  • Ambient temperature, altitude, and installation condition adaptation

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