Power transformers 20 to 600 MVA, 72.5 to 800 kV
Oil-filled power transformers rated 20 to 600 MVA for voltage classes of 72.5 to 800 kV, for grids, power plants, renewable energy facilities and energy storage. Ratings up to 1000 MVA are stated for grid projects. Each transformer is designed individually for the customer's task.
- Rating
- 20 to 600 MVA (range), up to 1000 MVA for grid projects
- Voltage class
- 72.5 to 800 kV (grid applications from 10 kV)
- Frequency
- 16.7 to 60 Hz
- Annual plant capacity
- 12,000 MVA
Price, availability and lead time on request. We help with analogue selection, customs clearance and delivery.
Description
Large oil-filled transformers are intended for transmission and distribution grids, power plants, renewable energy facilities, energy storage systems and large industrial consumers. The tradition goes back to 1885, when the first transformer with a closed magnetic core was built; oil-filled transformers have been made here since 1900. The works are located in Tapiószele in Hungary, with a production area of more than 11,000 m², crane capacity up to 280 t and an annual output capacity of 12,000 MVA.
The range covers 20 to 600 MVA at voltage classes of 72.5 to 800 kV and frequencies of 16.7 to 60 Hz. For grid operators ratings up to 1000 MVA and voltages from 10 to 800 kV are stated. Each transformer is designed individually. Special methods and software optimise the design for the cost of materials and labour, losses and noise level, and calculate the voltage distribution under lightning and switching impulses, short-circuit withstand, zones of high electric field strength, additional losses and heating.
Available versions include low-loss designs to Ecodesign Tier 2, low-noise transformers for sites with the strict requirements of Germany and Scandinavia, hybrid insulation, transformers with biodegradable ester fluids for higher fire and environmental safety, and water cooling. For step-up transformers of biomass and geothermal plants (generator voltage 10 to 24 kV) versions are made without regulation, with an off-circuit tap changer (OCTC) or with an on-load tap changer (OLTC). For BESS, bidirectional power flow, frequent load changes and inverter harmonics are taken into account, and for data centres the typical range is 50 to 300 MVA.
All transformers are tested in the company's own laboratory, accredited to ISO/IEC 17025. Routine, type and special tests to IEC and IEEE are performed up to 800 kV and 600 MVA, with lightning impulse up to 2400 kV, switching impulse up to 1550 kV, applied voltage up to 600 kV and a partial discharge level below 20 pC. There is an oil laboratory with dissolved gas analysis, and the transformers can be fitted with monitoring systems.
Examples of deliveries are three 125 MVA 115 kV transformers for the largest BESS in Germany (Förderstedt), four 63 MVA transformers for a data centre in Madrid, and a 100 MVA 165/10.5/10.5 kV transformer with synthetic ester and water cooling for a CHP plant in Odense (Denmark).
Technical specifications
| Rating | 20 to 600 MVA (range), up to 1000 MVA for grid projects |
|---|---|
| Voltage class | 72.5 to 800 kV (grid applications from 10 kV) |
| Frequency | 16.7 to 60 Hz |
| Annual plant capacity | 12,000 MVA |
| Insulating fluid | mineral oil, synthetic/natural ester |
| Energy efficiency | Ecodesign Tier 2 (low-loss versions) |
| Testing | ISO/IEC 17025 laboratory, lightning impulse up to 2400 kV, switching impulse up to 1550 kV |
| Standards | IEC, IEEE |
| Management systems | ISO 9001, ISO 14001, ISO 45001 |
Replacement for
ТДН-16000/110, ТРДЦН-63000/110, ТРДЦН-160000/220, ТДЦ-400000/330, ТЦ-630000/500, АОДЦТН-333000/750/330
selected by purpose and main parameters, please confirm with our manager
Request a price and lead time
Power transformers 20 to 600 MVA, 72.5 to 800 kV. We reply within one business day.
Or email sales@usk.ua or call 044 339-50-20.
Questions and answers
What range of ratings and voltages do these transformers have?
The range covers 20 to 600 MVA at voltage classes of 72.5 to 800 kV and frequencies of 16.7 to 60 Hz. For grid projects ratings up to 1000 MVA and voltages from 10 to 800 kV are stated.
What tests do the transformers undergo?
In the company's own laboratory, accredited to ISO/IEC 17025, routine, type and special tests to IEC and IEEE are performed up to 800 kV and 600 MVA. Lightning impulse reaches 2400 kV, switching impulse 1550 kV, and the partial discharge level is below 20 pC.
Are there versions for BESS and data centres?
Yes, for BESS bidirectional power flow, frequent load changes and inverter harmonics are taken into account. For data centres the typical range is 50 to 300 MVA, and one of the delivery examples includes four 63 MVA transformers for a data centre in Madrid.
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