33 kV Distribution Transformers
33 kV primary distribution transformers, oil immersed or cast resin, 50 Hz or 60 Hz, built and routine tested to IEC 60076. 33 kV is used for primary distribution and for the intake on larger plants. Insulation level and clearances follow IEC 60076 for the system highest voltage.
Specification
| Primary voltage | 33 kV |
|---|---|
| Secondary voltage | 400 / 415 V |
| Rated capacity | 50 – 3150 kVA (higher on request) |
| Frequency | 50 Hz or 60 Hz |
| Vector group | Dyn11, Yyn0 |
| Tappings | ±2 × 2.5% off-circuit |
| Insulation level | Per IEC 60076 for the system highest voltage |
| Standard | IEC 60076 |
Grids that use this voltage
| Market | Network | Frequency | Standard |
|---|---|---|---|
| Nigeria | 11 / 33 kV | 50 Hz | IEC, British practice |
| Bangladesh | 11 / 33 kV | 50 Hz | IEC |
| UAE | 11 / 33 kV | 50 Hz | IEC, ECAS |
Build notes
- Bushings and clearances set for the system highest voltage, not the nominal voltage.
- Tell us the fault level and the earthing arrangement; the impedance depends on it.
- Surge arrester provision is worth specifying at enquiry stage.
Questions buyers ask
Typically 30 days after drawing approval, depending on the quantity.
Yes. Test report, outline drawing and a terminal diagram go out with the unit.
Usually. Send the old nameplate or the outline drawing and we will check the footprint, terminal positions and loss figures before quoting.
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