33–35 kV Power Transformers
This is where the distribution range ends. We build 33 kV and 35 kV units as part of an industrial or utility intake. Anything above 35 kV, or above 10 MVA, is handled by our power-transformer site rather than here.
Scope of supply
| Voltage class covered | 33 kV and 35 kV, the upper edge of the distribution range |
|---|---|
| Rating | Built to order; ratings above this class sit with our power-transformer site |
| Cooling | ONAN, with ONAF on request |
| Windings | Copper or aluminium |
| Vector group | Dyn11 and others per the interconnection rules |
| Frequency | 50 Hz or 60 Hz |
| Short-circuit impedance | Per rating, typically 5.0 – 5.5% |
| Temperature rise | Top oil ≤ 50 K, winding ≤ 55 K at 45 °C ambient |
| Sound level | ≤ 60 dB at one metre |
| Enclosure | Hermetically sealed or conservator tank, for indoor or outdoor use |
| Standards | IEC 60076, BS 171 and the standard named in the order |
| Warranty | Two years |
| Delivery time | Typically 30 days, depending on quantity |
| Min. order quantity | 1 set |
Reading the boundary
- Up to 33–35 kV and up to 10 MVA: built here.
- Above 35 kV or above 10 MVA: xsdfftransformer.com.
- If the specification is unclear, send the single line and we will say which side it falls on.
- Vector group and impedance are confirmed against the network before quoting.
What to send with the enquiry
- Rating, primary and secondary voltage, frequency and vector group.
- The fault level or the impedance you need.
- Site altitude, ambient range and whether it sits indoors or out.
- Any utility interconnection standard that applies.
Questions buyers ask
Rating, primary and secondary voltage, frequency, vector group, quantity, application and the ambient conditions. A drawing or a nameplate photo settles most of it.
Typically 30 days from order confirmation, depending on quantity and specification. The schedule is confirmed with the quotation.
The standard named in the order. Ratings are designed to comply with IEC 60076, IEEE C57 or ANSI C57 as applicable to the order, and are verified before dispatch.
Yes. A routine test report for the serial number, an outline drawing and a terminal diagram ship with every unit.
About the manufacturer
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