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

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

This 5000 kva / step-down three-phase power transformer is designed for renewable energy interconnection, step-up duty, and grid-side distribution applications. It supports stable operation in solar, wind, photovoltaic, and energy-storage projects where flexible voltage ratios, reliable cooling, and project-oriented outdoor design are required.

Technical Parameters & Ratings

IEC / ANSI CertifiedFactory Standard
Rated Capacity5000 kVA
Primary Voltage (U1)33,000 V (33 kV)
Secondary Voltage (U2)415 V / 240 V (3-Phase 4-Wire)
Vector GroupDyn11
Rated Frequency50 Hz
Cooling MethodONAN (Oil Natural Air Natural)
Primary Current (I1)87.48 A
Secondary Current (I2)6956.1 A
Guaranteed No-Load Loss (P0)4100 W
Guaranteed Load Loss (Pk at 75°C)31000 W
Short-Circuit Impedance (Uk)5.5%
HV Insulation LevelLI 170 / AC 70 (33kV Class)
Temperature Rise LimitsTop Oil ≤ 50K, Winding ≤ 55K (45°C Ambient)
Creepage Distance≥ 31 mm/kV (Outdoor Tropicalized Porcelain)
Core & Coil Weight6800 kg
Insulating Oil Weight3900 kg
Total Assembled Weight13800 kg
Overall Footprint (L×W×H)2750 mm × 1750 mm × 2800 mm
Governing StandardsIEC 60076, BS 171, SON NIS, NERC Code

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

Frequently Asked Questions

What is the typical lead time for a 5000 kVA power transformer?

Standard lead time is 30 days after drawing approval. Large power transformers are built to order; the final schedule is confirmed once your technical specification and test scope are frozen.

Which standards does this transformer comply with?

The unit is designed and manufactured to IEC 60076 (ANSI/IEEE C57 where required), with routine tests performed on every unit before shipment.

Can the vector group and tap range be customized?

Yes. Vector group, tap range, impedance and cooling class (ONAN/ONAF/OFWF) are all configurable to match your grid study and protection scheme.

What test reports are supplied with the transformer?

Every unit ships with routine test reports covering ratio, winding resistance, insulation resistance, power-frequency withstand, induced voltage and loss measurements as applicable.

Do you support installation and commissioning for export projects?

Yes. Supervision of installation and commissioning can be arranged for EPC and utility projects, together with a full document package in your required language.

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