EV Charging post AMD2

[LastManOnline]

On a video from David Savery when he installed an EV charger, he went on a little rant about why PEN faults are not an issue for EVs, due to the charger points CPC not being bonded to the cars body/chassis but instead the DC battey ground is bonded the car body/chassis and there is isolation (via transformer) between the AC/TNCS CPC/Earth and the DC ground, I have no idea how true this is , but would be very interesting if it is true, even if only for some cars

Interestingly,the INDRA EV charger has an option the installer can choose where the circuit CPC is broken under open PEN faults ,thus ensuring the car metalwork is voltage free.Breaking the CPC? Thats more than a lttle revolutionary ,but if it can be done safely , I,m for it as I find it preferable to some of the current "safety measures" in use for EV chargers

 

[pc1966]

Breaking the CPC? Thats more than a lttle revolutionary ,but if it can be done safely , I,m for it as I find it preferable to some of the current "safety measures" in use for EV chargers

That is basically how the Matt:e and similar work, the major difference I guess is how they detect the open PEN condition.

Going TT is doing that from the outset by providing an alternative means of earthing (the rod).