Oil-Immersed Distribution Transformers
Designed for outdoor duty, this three-phase oil-immersed power transformer steps 11 / 33 kV down to 400 / 415 V and spans a wide 15 kVA–31500 kVA capacity…
| Parameter | Value |
|---|---|
| Product Type | Three-Phase Oil-Immersed Distribution Transformer |
| Rated Capacity | 15 kVA – 31500 kVA |
| Input Voltage | 11 / 33 kV |
| Output Voltage | 400 / 415 V |
| Frequency | 50 / 60 Hz |
| Phase | Three |
| Winding Material | Copper / Aluminium |
| Coil Structure | Fully Sealed Construction |
| Vector Group | Dyn11 / Yyn0 / Yd11 / YNd11 / Dyn5 |
| Service Life | 20–30 Years |
| Standard | IEC / GB |
| Certification | IEC, CE, ISO9001, ISO14001, ISO45001, CQC, GOST, EAC |
| Packing | Wooden Case |
| Package Size | 280 × 200 × 250 cm |
| Gross Weight | 5400 kg |
Figures reflect the supplied product data. Actual dimensions, materials, colors, and packaging depend on the confirmed sample and final order agreement.
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.
Designed for outdoor duty, this three-phase oil-immersed power transformer steps 11 / 33 kV down to 400 / 415 V and spans a wide 15 kVA–31500 kVA capacity range. It pairs a silicon-steel core with copper or aluminium windings, and the sealed corrugated-fin tank keeps the oil free of oxidation and eliminates the need for topping up, supporting a low-maintenance service life of 20–30 years in outdoor and substation distribution roles. Windings are available in copper or aluminium, with construction meeting both IEC and GB standards.
A hermetically sealed steel tank fitted with corrugated cooling fins keeps the transformer oil isolated from outside air, blocking oxidation and moisture while still shedding heat effectively. High-voltage porcelain bushings and the low-voltage terminal block sit on the tank cover, and the assembly includes pressure-relief and oil-level protection devices. Together these elements deliver steady, low-loss performance that asks very little of maintenance crews.
Suited to outdoor and indoor distribution work for utilities, industrial facilities, mining operations, oil fields, commercial developments and rural electrification projects that need dependable medium-voltage step-down.
Project teams can specify capacity, voltage ratio, vector group, winding material (copper or aluminium), tap-changer type (off-load or on-load) and bushing arrangement to match site requirements.
The rated capacity is 15 kVA – 31500 kVA, with an input voltage of 11 / 33 kV. Other ratings in the same series are quoted on request.
A fully sealed corrugated-fin tank keeps oil away from air, so there's no oxidation, no breathing, and almost no upkeep; Low no-load loss combined with a low operating temperature drives high overall efficiency; Built to hold up for 20–30 years even in demanding outdoor conditions.
Project teams can specify capacity, voltage ratio, vector group, winding material (copper or aluminium), tap-changer type (off-load or on-load) and bushing arrangement to match site requirements.
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
Tell us the rating, voltages, frequency, quantity and destination. An engineer replies with a technical proposal, usually within one working day.
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