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5000 kVA 33kV/11kV Step-Down Three-Phase Power Transformer

Taking 33,000 V (33 kV) on the primary and delivering 415 V / 240 V (3-Phase 4-Wire), this distribution transformer is set up for Commercial and institutional buildings, industrial facilities, oil & gas, solar and wind energy. Insulation is Mineral oil with 5.5% short-circuit impedance. Windings are Copper / Aluminium on a High-efficiency (CRGO) silicon steel core. 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. Specification is confirmed per order, with compliance to IEC 60076, BS 171, SON NIS, NERC Code as applicable to the order. Typical 30-day delivery, two years warranty, MOQ one set.

Technical Parameters & Ratings

IEC / ANSI CertifiedFactory Standard
Power Rating 5000 kVA
Primary Voltage 33,000 V (33 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 5.5%
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

  • Solar power plants
  • Wind farm collector and grid interface systems
  • Photovoltaic station and inverter interconnection projects
  • Battery energy storage systems (BESS)
  • Renewable energy substations and export EPC projects

Key Features

  • 5000 kVA rated capacity for renewable interconnection, step-up, or project-side power conversion
  • Designed for solar, wind, PV, or energy-storage power system applications
  • Configurable voltage ratio for inverter-side, collector-side, or grid-side connection
  • Oil-immersed construction for dependable cooling in outdoor renewable projects
  • Project-oriented accessory and monitoring options available
  • Suitable for IEC-based renewable projects and export EPC 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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