Oil-Immersed Distribution Transformers

1250kVA & 1600kVA Three-Phase Oil-Immersed Step-Up / Step-Down Power Transformer (CE)

This three-phase oil-immersed transformer handles both step-up and step-down duty, rated at 1250 kVA and 1600 kVA within a broader lineup spanning 15 kVA to…

Technical specifications

Technical specifications of 1250kVA & 1600kVA Three-Phase Oil-Immersed Step-Up / Step-Down Power Transformer (CE)
ParameterValue
Product TypeThree-Phase Oil-Immersed Distribution Transformer
Rated Capacity1250 kVA & 1600 kVA (range 15 kVA–31500 kVA)
Input Voltage10 / 11 / 35 kV
Output Voltage380 V
Frequency50 / 60 Hz
PhaseThree
Winding MaterialCopper / Aluminium
Coil StructureFully Sealed Construction
Vector GroupDyn11 / Yyn0 / Yd11 / YNd11 / Dyn5
Service Life20–30 Years
StandardIEC / GB
CertificationISO9001 / CE
PackingWooden Case
Package Size280 × 200 × 250 cm
Gross Weight5400 kg

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

  • A fully sealed, corrugated-fin tank that prevents oil oxidation, needs no breathing, and keeps maintenance to a minimum
  • Efficient operation thanks to low no-load loss and a low running temperature
  • A rugged design rated for 20–30 years of service, even in demanding outdoor conditions
  • Flexibility across capacity, voltage range, and vector group configuration
  • Certification coverage including IEC, CE, ISO9001/14001/45001, CQC, GOST, and 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

This three-phase oil-immersed transformer handles both step-up and step-down duty, rated at 1250 kVA and 1600 kVA within a broader lineup spanning 15 kVA to 31500 kVA, converting between 10/11/35 kV and 380 V. Its sealed tank with corrugated fins keeps oil free from oxidation and eliminates the need for topping-up, supporting a service life of 20 to 30 years in outdoor substation and distribution settings. Windings come in copper or aluminium, all built to IEC and GB standards.

Design & Construction

A hermetically sealed steel tank ringed with corrugated cooling fins keeps the transformer oil isolated from outside air, blocking oxidation and moisture while still dissipating heat effectively. The tank cover carries high-voltage porcelain bushings and low-voltage terminals, and the structure includes pressure-relief and oil-level safeguards. Together these elements deliver stable, low-loss performance that needs very little routine attention.

Applications

Utilities, industrial plants, mining operations, oil fields, commercial complexes, and rural electrification projects rely on this unit for indoor and outdoor power distribution wherever dependable step-down from medium voltage is needed.

Customisation Options

Project requirements can drive changes to capacity, voltage ratio, vector group, winding material (copper or aluminium), tap changer type (off-load or on-load), and bushing configuration.

Ordering Information

  • Selling Unit: Single item
  • Packing: Wooden case, 280 × 200 × 250 cm, 5400 kg gross
  • Standards: IEC / GB; certified to IEC, CE, ISO9001/14001/45001, CQC, GOST, EAC

Product details in pictures

1250kVA & 1600kVA Three-Phase Oil-Immersed Step-Up / Step-Down Power Transformer (CE) — detail 1
1250kVA & 1600kVA Three-Phase Oil-Immersed Step-Up / Step-Down Power Transformer (CE) — detail 2
1250kVA & 1600kVA Three-Phase Oil-Immersed Step-Up / Step-Down Power Transformer (CE) — detail 3
1250kVA & 1600kVA Three-Phase Oil-Immersed Step-Up / Step-Down Power Transformer (CE) — detail 4

Frequently asked questions

What is the rated capacity of the 1250kVA & 1600kVA Three-Phase Oil-Immersed Step-Up / Step-Down Power Transformer (CE)?

The rated capacity is 1250 kVA & 1600 kVA (range 15 kVA–31500 kVA), with an input voltage of 10 / 11 / 35 kV. Other ratings in the same series are quoted on request.

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

A fully sealed, corrugated-fin tank that prevents oil oxidation, needs no breathing, and keeps maintenance to a minimum; Efficient operation thanks to low no-load loss and a low running temperature; A rugged design rated for 20–30 years of service, even in demanding outdoor conditions.

Can this product be customised to my specification?

Project requirements can drive changes to capacity, voltage ratio, vector group, winding material (copper or aluminium), tap changer type (off-load or on-load), and bushing configuration.

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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