Oil-Immersed Distribution Transformers

11/33kV Three-Phase Oil-Immersed Power Transformer (1000kVA–10MVA, Copper Winding)

Designed to bring 11kV or 33kV supply down to 415V, this three-phase oil-immersed power transformer serves utility and industrial distribution networks that…

Technical specifications

Technical specifications of 11/33kV Three-Phase Oil-Immersed Power Transformer (1000kVA–10MVA, Copper Winding)
ParameterValue
Product TypeOil-Immersed Power Transformer
Rated Capacity1000kVA – 10MVA
Input Voltage11 kV / 33 kV
Output Voltage415 V
Frequency50 / 60 Hz
PhaseThree
Coil NumberMulti Winding
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

  • Converts 11kV / 33kV input down to a 415V output
  • Broad capacity coverage spanning 1000kVA, 1600kVA, 3MVA, and 10MVA
  • Choice of copper or aluminium windings in a multi-winding configuration
  • Supports several vector groups: Dyn11 / Yyn0 / Yd11 / YNd11 / Dyn5
  • Backed by recognized 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

Designed to bring 11kV or 33kV supply down to 415V, this three-phase oil-immersed power transformer serves utility and industrial distribution networks that need dependable medium-voltage conversion. It spans a capacity range of 1000kVA up to 10MVA, is offered with either copper or aluminium windings, and runs efficiently at 50Hz or 60Hz. A fully sealed tank paired with corrugated radiators keeps cooling performance consistent under load.

Design & Construction

  • A rectangular steel tank fitted with corrugated fin radiators to dissipate heat effectively
  • Horizontal cylindrical conservator tank that accommodates oil expansion
  • HV porcelain bushings together with LV terminals mounted on the tank cover
  • A steel channel base that keeps the unit stable when installed on concrete pads
  • Fully sealed build that limits oil oxidation over time

Applications

This unit fits naturally into 11kV/33kV utility substations, industrial power supply setups, distribution networks, and infrastructure projects where dependable medium-voltage transformation is required.

Customisation Options

Project needs can shape the capacity, voltage ratio, vector group, cooling configuration, and certification. Copper or aluminium winding material is also available on request.

Ordering Information

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

Product details in pictures

11/33kV Three-Phase Oil-Immersed Power Transformer (1000kVA–10MVA, Copper Winding) — detail 1
11/33kV Three-Phase Oil-Immersed Power Transformer (1000kVA–10MVA, Copper Winding) — detail 2
11/33kV Three-Phase Oil-Immersed Power Transformer (1000kVA–10MVA, Copper Winding) — detail 3
11/33kV Three-Phase Oil-Immersed Power Transformer (1000kVA–10MVA, Copper Winding) — detail 4

Frequently asked questions

What is the rated capacity of the 11/33kV Three-Phase Oil-Immersed Power Transformer (1000kVA–10MVA, Copper Winding)?

The rated capacity is 1000kVA – 10MVA, with an input voltage of 11 kV / 33 kV. Other ratings in the same series are quoted on request.

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

Converts 11kV / 33kV input down to a 415V output; Broad capacity coverage spanning 1000kVA, 1600kVA, 3MVA, and 10MVA; Choice of copper or aluminium windings in a multi-winding configuration.

Can this product be customised to my specification?

Project needs can shape the capacity, voltage ratio, vector group, cooling configuration, and certification. Copper or aluminium winding material is also 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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