The mastery of electrical energy relies on reliable, high-performance equipment adapted to the needs of modern networks. France Transfo, a specialist in the design and supply of electrical transformation solutions, offers a wide range of transformers for high voltage (HV) and extra-high voltage (EHV) applications.
HV and EHV transformers
1. Power transformer
Essential for the transmission and distribution of electricity, the power transformer is used in electrical substations to step up or step down voltage between different grid levels. It is a key component for the stability and performance of electrical infrastructure.
2. Isolation transformer
Designed to separate the upstream network from downstream installations, this type of transformer provides protection against voltage surges and reduces electromagnetic interference, thereby ensuring the safety of users and equipment.
3. Voltage transformer (VT)
Used in measurement and protection systems, it steps down high voltage to a safely measurable level, facilitating the operation and maintenance of networks.
4. Current transformer
Found in EHV power plants and substations, this transformer enables the measurement of high currents while protecting control and protection equipment through its effective insulation.
5. Autotransformer
With a single winding shared between the primary and secondary, the autotransformer is used for small voltage differences or specific EHV requirements.
6. Rectifier transformer
Specially designed for the conversion of alternating current (AC) to direct current (DC), it is essential in many industrial and transport installations.
7. Earthing transformer
It provides the earth connection for the network, ensuring the safety of installations and a stable neutral regime.
Dry-type transformers
France Transfo also develops HV/LV dry-type transformers, favoured in urban, industrial and tertiary environments. Unlike oil-immersed models, they use resin or air insulation, making them particularly suitable for sensitive areas.
- Cast resin transformer: insulated with epoxy resin, suitable for both indoor and outdoor installations.
- Impregnated dry transformer: used for power ratings up to 5 MVA, offering a reliable solution for medium voltages.
- Dry-type HV/LV transformer: steps down high voltage A (1 kV to 50 kV) to low voltage, ideal for industrial and commercial sites.
- LV/LV dry transformer: provides galvanic isolation or voltage adaptation between two low-voltage networks, ensuring safety and reliability.
Specialised variants
France Transfo also offers models dedicated to specific applications:
- Traction transformer: robust, designed for railway and public transport requirements.
- Transformer for explosive atmospheres: ATEX-certified, suitable for hazardous environments.
- Dual-voltage transformer: offers two voltage levels on the primary or secondary side according to installation requirements.
Conclusion
Thanks to its expertise, France Transfo covers all electrical transformation needs, from raw power to the most specialised applications. Reliability, safety and innovation characterise every solution, enabling the lasting support of developments in electrical networks in France and internationally.
