Has anybody used these matt-e products for EV charging points?

Hi John, the important thing to remember about our technology is the way we measure the N-Vn voltage, of course an imbalanced load will have an impact with the Neutral intact but not generally sufficient to create a ‘dangerous’ touch voltage, If the voltage were to rise above the 70v threshold then we will disconnect either with the Neutral connected or disconnected. The important measurement is 70v which can be detected either through Earth or a combination of the phase voltage configurations, simple single phase measurements cannot detect an open PEN conductor in all situations, hence 722.411.4.1 (iv) devices are currently not permitted on installations with a 3 phase incoming supply.

Hi John, the important thing to remember about our technology is the way we measure the N-Vn voltage, of course an imbalanced load will have an impact with the Neutral intact but not generally sufficient to create a ‘dangerous’ touch voltage, If the voltage were to rise above the 70v threshold then we will disconnect either with the Neutral connected or disconnected. The important measurement is 70v which can be detected either through Earth or a combination of the phase voltage configurations, simple single phase measurements cannot detect an open PEN conductor in all situations, hence 722.411.4.1 (iv) devices are currently not permitted on installations with a 3 phase incoming supply.