Oil-Immersed Distribution Transformers

800/1600kVA 11kV/440V Three-Phase Oil-Immersed Step-Down Transformer

Built to bring 11kV down to 440V, this three-phase oil-immersed power transformer serves industrial power systems as well as renewable-energy installations.…

Technical specifications

Technical specifications of 800/1600kVA 11kV/440V Three-Phase Oil-Immersed Step-Down Transformer
ParameterValue
Product TypeOil-Immersed Power Transformer
Rated Capacity800 kVA / 1600 kVA
Input Voltage11 kV
Output Voltage440 V
Frequency50 / 60 Hz
PhaseThree
Winding MaterialCopper / Aluminium
Vector GroupDyn11 / Yyn0 / Yd11 / YNd11 / Dyn5
StandardIEC / GB
CertificationUL, CE, ISO9001, EAC, ISO14001, ISO45001

These specifications reflect the product data supplied. Final dimensions, materials, colors, and packaging are confirmed at the sample and order stage.

Why buyers choose it

  • Steps 11kV down to 440V, available in 800kVA and 1600kVA ratings
  • Copper or aluminium winding options across a multi-vector-group design
  • A fully sealed tank with corrugated radiators for efficient heat dissipation
  • Well matched to solar, wind, and general industrial power applications
  • Backed by international certifications: UL, CE, ISO9001, EAC, ISO14001, ISO45001

Standards & certification

Designed and tested to IEC / GB. Millenium production is certified to ISO 9001, ISO 14001 and ISO 45001; the product family carries CE (ECM), UDEM attestation and an EAC declaration of conformity. Every unit passes routine factory tests before dispatch.

Product details

Built to bring 11kV down to 440V, this three-phase oil-immersed power transformer serves industrial power systems as well as renewable-energy installations. It comes in 800kVA and 1600kVA ratings, with copper or aluminium windings housed in a fully sealed tank whose corrugated radiators support reliable, efficient running at either 50Hz or 60Hz.

Design & Construction

  • A rectangular steel tank fitted with corrugated fin radiators
  • A horizontal cylindrical conservator tank for oil expansion
  • HV porcelain bushings and LV bushings mounted on the tank cover
  • A steel channel base that supports stable installation
  • Fully sealed construction that limits oil oxidation

Applications

This transformer is well suited to industrial power systems, solar and wind renewable-energy substations, distribution networks, and any infrastructure needing dependable 11kV step-down conversion.

Customisation Options

Capacity, voltage ratio, vector group, cooling configuration, and certification can be adapted to project needs, and copper or aluminium winding material is available on request.

Ordering Information

When placing an order, please specify the rated capacity, primary/secondary voltage, frequency, vector group, and the applicable standard.

Product details in pictures

800/1600kVA 11kV/440V Three-Phase Oil-Immersed Step-Down Transformer — detail 1
800/1600kVA 11kV/440V Three-Phase Oil-Immersed Step-Down Transformer — detail 2
800/1600kVA 11kV/440V Three-Phase Oil-Immersed Step-Down Transformer — detail 3
800/1600kVA 11kV/440V Three-Phase Oil-Immersed Step-Down Transformer — detail 4

Frequently asked questions

What is the rated capacity of the 800/1600kVA 11kV/440V Three-Phase Oil-Immersed Step-Down Transformer?

The rated capacity is 800 kVA / 1600 kVA, with an input voltage of 11 kV. Other ratings in the same series are quoted on request.

What are the main advantages of this oil-immersed transformer?

Steps 11kV down to 440V, available in 800kVA and 1600kVA ratings; Copper or aluminium winding options across a multi-vector-group design; A fully sealed tank with corrugated radiators for efficient heat dissipation.

Can this product be customised to my specification?

Capacity, voltage ratio, vector group, cooling configuration, and certification can be adapted to project needs, and copper or aluminium winding material is available on request.

Which standards and certifications apply?

Designed and tested to IEC / GB. Millenium production is certified to ISO 9001, ISO 14001 and ISO 45001, and the product family carries CE (ECM), UDEM attestation and an EAC declaration of conformity.

Quotation

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