22 kV Distribution Transformers
22 kV primary distribution transformers, oil immersed or cast resin, 50 Hz or 60 Hz, built and routine tested to IEC 60076. 22 kV distribution is standard in Vietnam. Where a network runs 34.5 kV at 60 Hz, we build the 34.5 kV design to the same outline with the insulation level raised to suit.
Specification
| Primary voltage | 22 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 |
|---|---|---|---|
| Vietnam | 22 / 35 kV | 50 Hz | TCVN / IEC |
| Philippines | 13.8 / 34.5 kV | 60 Hz | IEEE / ANSI influence |
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.
Frequently asked questions
Send the rated power in kVA, primary and secondary voltage, frequency (50 or 60 Hz), cooling type, vector group and the application. Our engineers reply with a technical proposal and price within one working day.
Typically 30 days from order confirmation, depending on order quantity and specification. The exact schedule is confirmed with each quotation.
Two years from dispatch. Warranty terms are stated in the order confirmation.
One set. Single-unit orders and project volumes are both accepted.
Units are designed and tested to comply with IEC 60076, IEEE C57 and ANSI C57 as applicable to the order. Test reports are supplied with each shipment.
22 kV reduces current and voltage drop for a given load, which suits larger sites and longer feeders. The choice depends on your utility supply and load.
Oil-immersed and cast-resin designs are both built at 22 kV within our range.
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