Power Transformers (up to 110 kV)

15 / 20 MVA Power Transformer for 33 / 66 kV Oil-Field Duty

This three-phase oil-immersed transformer, rated 15 or 20 MVA, converts a 33 or 66 kV supply down to 10 kV or 415 V, built to handle substation, industrial…

Technical specifications

Technical specifications of 15 / 20 MVA Power Transformer for 33 / 66 kV Oil-Field Duty
ParameterValue
Product TypeThree-Phase Oil-Immersed Power Transformer
Rated Capacity15 / 20 MVA
Input Voltage (HV)33 / 66 kV
Output Voltage (LV)10 kV / 415 V
Frequency50 / 60 Hz
PhaseThree
Winding MaterialCopper / Aluminium
Vector GroupDyn11 / Yyn0
CoolingONAN / ONAF (oil-immersed, radiator)
StandardIEC / GB
CertificationCE, UL, ISO9001
PackingWooden Case

Figures shown reflect the supplied product data. Exact dimensions, materials, finish and packaging are confirmed at sample approval and order confirmation.

Why buyers choose it

  • Covers 33 / 66 kV service in 15 or 20 MVA ratings for substation and oil-field applications
  • Sealed oil-immersed tank with radiator cooling and conservator
  • Dyn11 / Yyn0 vector groups match single-line requirements
  • Rugged build suited to demanding field environments
  • Certified CE, UL, ISO9001; built to IEC / GB standards

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

This three-phase oil-immersed transformer, rated 15 or 20 MVA, converts a 33 or 66 kV supply down to 10 kV or 415 V, built to handle substation, industrial and oil-field power needs. Construction includes a sealed steel tank, radiator cooling and a conservator oil-expansion system, engineered specifically to withstand harsh field conditions such as those found on oil-and-gas sites. Copper or aluminium windings meet IEC/GB requirements.

Design & Construction

High-voltage porcelain bushings sit on the sealed tank alongside a top-mounted conservator for oil expansion, radiator banks for heat rejection, and a control cabinet for monitoring and protection. The oil-immersed build keeps cooling efficient and insulation stable, giving reliable performance in both substation settings and oil-field power systems.

Applications

Well suited to oil-and-gas field power supply, utility and industrial substations, transmission and distribution networks, and large plants needing 33/66-kV-class transformation.

Customisation Options

Capacity, HV/LV voltage, vector group, tap-changer type, cooling class and fittings can be adapted to a project's single-line requirements.

Ordering Information

  • Selling Unit: Single item
  • Packing: Wooden Case
  • Standards: IEC / GB; certified CE, UL, ISO9001

Product details in pictures

15 / 20 MVA Power Transformer for 33 / 66 kV Oil-Field Duty — detail 1
15 / 20 MVA Power Transformer for 33 / 66 kV Oil-Field Duty — detail 2
15 / 20 MVA Power Transformer for 33 / 66 kV Oil-Field Duty — detail 3
15 / 20 MVA Power Transformer for 33 / 66 kV Oil-Field Duty — detail 4

Frequently asked questions

What is the rated capacity of the 15 / 20 MVA Power Transformer for 33 / 66 kV Oil-Field Duty?

The rated capacity is 15 / 20 MVA, with an input voltage of 33 / 66 kV. Other ratings in the same series are quoted on request.

What are the main advantages of this power transformer?

Covers 33 / 66 kV service in 15 or 20 MVA ratings for substation and oil-field applications; Sealed oil-immersed tank with radiator cooling and conservator; Dyn11 / Yyn0 vector groups match single-line requirements.

Can this product be customised to my specification?

Capacity, HV/LV voltage, vector group, tap-changer type, cooling class and fittings can be adapted to a project's single-line requirements.

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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