Power Transformers (up to 110 kV)

Custom-Built 2500 kVA Power Transformer, 66 kV to 415 V

Built to order, this three-phase oil-immersed transformer is rated 2500 kVA and steps 66 kV directly down to 415 V for industrial and distribution power…

Technical specifications

Technical specifications of Custom-Built 2500 kVA Power Transformer, 66 kV to 415 V
ParameterValue
Product TypeThree-Phase Oil-Immersed Power Transformer
Rated Capacity2500 kVA
Input Voltage (HV)66 kV
Output Voltage (LV)415 V
Frequency50 / 60 Hz
PhaseThree
Winding MaterialCopper / Aluminium
Vector GroupDyn11 / Yyn0
CoolingONAN (oil-immersed, radiator)
StandardIEC / GB
CertificationIEC, CE, ISO9001, ISO14001, ISO45001, CQC, GOST, EAC
Service Life20 Years
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

  • Steps straight from 66 kV to 415 V in a compact 2500 kVA unit
  • Sealed oil-immersed tank with radiator cooling and conservator
  • Dyn11 / Yyn0 vector groups fit single-line requirements
  • Low-loss copper or aluminium windings, rated for 20 years of service
  • Certified IEC, CE, ISO9001/14001/45001, CQC, GOST, EAC

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 order, this three-phase oil-immersed transformer is rated 2500 kVA and steps 66 kV directly down to 415 V for industrial and distribution power feeds. It uses a sealed steel tank, radiator cooling and a conservator oil-expansion system, designed for a 20-year service life and configured around each project's single-line diagram. Windings come in copper or aluminium, meeting IEC/GB requirements.

Design & Construction

High-voltage porcelain bushings sit on the sealed tank next to a top-mounted conservator for oil expansion, side radiator banks, and a control cabinet for monitoring and protection. Engineered for direct 66 kV / 415 V supply, the oil-immersed design keeps cooling efficient and insulation stable for long, dependable industrial service.

Applications

Suited to industrial plants, mining operations, infrastructure projects and distribution networks that need a compact 66-kV-to-415-V step-down unit.

Customisation Options

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

Ordering Information

  • Selling Unit: Single item
  • Packing: Wooden Case
  • Standards: IEC / GB; certified IEC, CE, ISO9001/14001/45001, CQC, GOST, EAC

Product details in pictures

Custom-Built 2500 kVA Power Transformer, 66 kV to 415 V — detail 1
Custom-Built 2500 kVA Power Transformer, 66 kV to 415 V — detail 2
Custom-Built 2500 kVA Power Transformer, 66 kV to 415 V — detail 3
Custom-Built 2500 kVA Power Transformer, 66 kV to 415 V — detail 4

Frequently asked questions

What is the rated capacity of the Custom-Built 2500 kVA Power Transformer, 66 kV to 415 V?

The rated capacity is 2500 kVA, with an input voltage of 66 kV. Other ratings in the same series are quoted on request.

What are the main advantages of this power transformer?

Steps straight from 66 kV to 415 V in a compact 2500 kVA unit; Sealed oil-immersed tank with radiator cooling and conservator; Dyn11 / Yyn0 vector groups fit 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 adjusted 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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