Oil-Immersed Distribution Transformers

500kVA & 1000kVA 11kV/400V Three-Phase Oil-Immersed Distribution Transformer

Rated at 500 kVA and 1000 kVA, this fully sealed three-phase oil-immersed distribution transformer steps 11 kV down to 400 V. A sealed tank with corrugated…

Technical specifications

Technical specifications of 500kVA & 1000kVA 11kV/400V Three-Phase Oil-Immersed Distribution Transformer
ParameterValue
Product TypeThree-Phase Oil-Immersed Distribution Transformer
Rated Capacity500 kVA & 1000 kVA
Input Voltage11 kV
Output Voltage400 V
Frequency50 / 60 Hz
PhaseThree
Winding MaterialCopper / Aluminium
Coil StructureFully Sealed Construction
Vector GroupDyn11 / Yyn0 / Yd11 / YNd11 / Dyn5
Service Life20–30 Years
StandardIEC / GB
CertificationUL, IEC, CE, ISO9001, ISO14001, ISO45001, CQC, GOST, EAC
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 performance from low no-load loss and a low running temperature
  • Rated for 20 to 30 years of service, built to handle harsh outdoor conditions
  • Flexibility across capacity, voltage, and vector group options
  • 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

Rated at 500 kVA and 1000 kVA, this fully sealed three-phase oil-immersed distribution transformer steps 11 kV down to 400 V. A sealed tank with corrugated fins keeps the oil from oxidizing and removes the need for topping-up, giving the unit a low-maintenance 20 to 30 year service life for outdoor substation and distribution use. Copper or aluminium windings are available, built to IEC and GB standards.

Design & Construction

A hermetically sealed steel tank ringed with corrugated cooling fins keeps the transformer oil shielded from outside air, resisting oxidation and moisture while dissipating heat effectively. HV porcelain bushings and LV terminals sit on the tank cover, and pressure-relief plus oil-level protection is built into the structure. The result is stable, low-loss operation that needs very little routine attention.

Applications

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

Customisation Options

Capacity, voltage ratio, vector group, winding material (copper or aluminium), tap changer type (off-load or on-load), and bushing configuration can be tailored to project needs.

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

500kVA & 1000kVA 11kV/400V Three-Phase Oil-Immersed Distribution Transformer — detail 1
500kVA & 1000kVA 11kV/400V Three-Phase Oil-Immersed Distribution Transformer — detail 2
500kVA & 1000kVA 11kV/400V Three-Phase Oil-Immersed Distribution Transformer — detail 3
500kVA & 1000kVA 11kV/400V Three-Phase Oil-Immersed Distribution Transformer — detail 4

Frequently asked questions

What is the rated capacity of the 500kVA & 1000kVA 11kV/400V Three-Phase Oil-Immersed Distribution Transformer?

The rated capacity is 500 kVA & 1000 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?

A fully sealed, corrugated-fin tank that prevents oil oxidation, needs no breathing, and keeps maintenance to a minimum; Efficient performance from low no-load loss and a low running temperature; Rated for 20 to 30 years of service, built to handle harsh outdoor conditions.

Can this product be customised to my specification?

Capacity, voltage ratio, vector group, winding material (copper or aluminium), tap changer type (off-load or on-load), and bushing configuration can be tailored to project needs.

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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