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EV Charging: Why Are Isolation Transformers Important?

As a specialist in isolation transformers for EV charging installers, Electro-Wind is offering advice to electricians regarding the requirements of the 18th Edition, according to Section 722, which covers the particular requirements when installing points for EV charging.

When considering the general requirements for conductor arrangement and system earthing, it may be necessary to install a three-phase isolation transformer providing a protective measure through electrical separation.

Historically, domestic EV charging points relied on the system earthing supplied by the main electricity supply to the building. The new legislation requires a PME earthing facility not be used for the protective conductor, unless certain methods are employed.

Electro-Wind offers a cost-effective solution to these isolation transformer needs, whether it’s a new, single or three-phase supply or an upgrade to a previous EV point installation.

The isolating transformers for domestic installations are supplied in a suitable enclosure that can be fitted to an internal wall of a garage or externally if so required to supply an EV charge point. The transformers are built to comply with BSEN61558-2-4 and have been installed to supply power to EV chargers at Volvo, Audi and Porsche UK sales centres.

For more details about how Electro-Wind’s engineers can help you find the right solution for your EV charging needs, go to: