Distribution Transformers for India
Oil-immersed and cast resin distribution transformers built for Indian networks: 3.3, 6.6, 11, 22 and 33 kV primary at 50 Hz, stepping down to 415 V three-phase. We build to the order specification, including IS 1180 where the order calls for it.
Local network data
| Distribution circuit voltages | 3.3 / 6.6 / 11 / 22 / 33 kV |
|---|---|
| System frequency | 50 Hz |
| Secondary voltage | 415 V three-phase (240 V single phase); 433 V where specified |
| Typical vector group | Dyn11 |
| Standard ratings (IS 1180) | 250 – 2500 kVA, three-phase, up to 33 kV |
| Local standard | IS 1180 (Part 1) — oil-immersed distribution transformers |
| Design basis | IEC 60076; IS 1180 where the order specifies |
| Ambient design | Up to 50 °C ambient, tropical humidity |
IS 1180 (Part 1) covers three-phase oil-immersed distribution transformers up to 2500 kVA at system voltages up to and including 33 kV — inside our distribution range.
Send the state utility or EPC specification and we build to it, vector group and tapping included.
Build specification
| Phase | Three-phase |
|---|---|
| Cooling Type | ONAN on oil-immersed builds; AN / AF on dry-type builds |
| Core Material | High-efficiency (CRGO) silicon steel |
| Connection Group | Dyn11, Yyn0, Dyn5 |
| Winding Material | Copper / Aluminium |
| Tap Changer | ± 2 × 2.5% Off-Circuit Tap Changer (OCTC) |
| Noise Level | ≤ 60 dB at 1 meter |
| Enclosure | Hermetically sealed steel tank, weatherproof for indoor and outdoor use |
| Altitude | ≤ 1,000 m or customized |
| Ambient Temperature Range | -30 °C to +50 °C |
| Standards Compliance | Designed to comply with IEC 60076, IEEE C57 and ANSI C57 as applicable to the order |
| Warranty | Two years |
| Delivery Time | Typically 30 days, depending on quantity |
| Min. order quantity | ≥ 1 set |
Oil immersed or cast resin?
- Oil immersed: outdoor substations, pole and pad-mounted duty.
- Cast resin: indoor rooms and sites where fire rules restrict oil.
- Tell us where the unit sits and we will specify the build.
Where these units are used
Questions buyers ask
Where the order specifies IS 1180, yes — IS 1180 (Part 1) covers three-phase oil-immersed distribution transformers up to 2500 kVA at system voltages up to 33 kV. Where the order specifies IEC 60076 instead, we build to that.
3.3, 6.6, 11, 22 and 33 kV at 50 Hz, with 415 V or 433 V secondary as specified. Tell us the utility and we match the tapping range and vector group.
Typically 30 days after drawing approval, depending on the quantity.
Rating, primary and secondary voltage, frequency, vector group, quantity, application and the ambient conditions. A drawing or a nameplate photo settles the rest.
Send us the specification
Rating, primary and secondary voltage, frequency, quantity and the application. We answer within one working day.
Email info@xsdfftransformer.com · WhatsApp +852 54162620