In the UK, the wiring regs stipulate than an external EV chargepoint on an installation with TN-C-S earthing must have either a ground rod or a device that isolates all 3 conductors in the case of a neutral fault (PEN fault)
No review?
Device is certified for EU.
CE is there.
In the UK, the wiring regs stipulate than an external EV chargepoint on an installation with TN-C-S earthing must have either a ground rod or a device that isolates all 3 conductors in the case of a neutral fault (PEN fault)
Which is absolute bollocks. Most regs stipulate that you need the PE bonded to car, not going through any switching, so it's a fundamental regulatory incompatibility..
Not to mention that in a PEN fault, every chassis-bonded device in a house becomes live, not just your car, so singling out EVs specifically seems a bit weird..
it may be useful in countries with bad electrical infrastructure, where shoddy neutral connection is a real risk.
Shunt tripping RCDs is usually discouraged in most EU safety standards. I skimmed the video, but isn't this just a MOV in a box connected between post-RCD-neutral and some true earth pulled from somewhere (rod?) such that when they deviate by too many volts the RCD trips?
Also opening the RCD won't actually mitigate the main TNC-S lost neutral risk, it'll only prevent equipment damage.
And the advice is nearly hilarious.
A neutral fault in the electricity network is usually caused by a tree falling on a power line, disconnecting the rope that supports the bundle assembled aerial cables of the low voltage network, known as the PEN conductor, which is a metal cable that supports the phase conductors between poles.
Shunt tripping RCDs is usually discouraged in most EU safety standards. I skimmed the video, but isn't this just a MOV in a box connected between post-RCD-neutral and some true earth pulled from somewhere (rod?) such that when they deviate by too many volts the RCD trips?
I have to visit Finland. Crazy, can you show some photos how this Finnish PEN looks like?
Of course that doesn't help with any devices in the house where suddenly PE became essentially a phase/live. If you were to put such a device in the panel for the entire house/unit, that would make more sense. There is added risk due to much crappier PE bonding now, since it goes through a relay back to the supply.
Of course that doesn't help with any devices in the house where suddenly PE became essentially a phase/live. If you were to put such a device in the panel for the entire house/unit, that would make more sense. There is added risk due to much crappier PE bonding now, since it goes through a relay back to the supply.The difference is that a EV is one of the only places you will see a PE conductor exported from the "equipotential zone". Assuming TN-C-S supply (Normal in the UK), inside the house all the metalwork (Taps, pipes, and such) that might bring in a 'earth' at a different potential to the PE conductor are bonded together and to the PE. This means that in the event of a neutral fault the PE might rise up, but everything in the house will be at the same potential relative to ground so no shock. You cannot practically do this with a heavy power line run out onto the drive way.
If you look at garden tools you will discover that most of them have 2 core supply cables and double insulation to get around the need to export a ground.
Arguably the easy way would have been to make an EV a ground free device and just feed it with phase(s) and neutral, but I can see squabbling about EMC issues if going there.
An alternative approach is to convert the property to TT earthing with a mess of ground rods to try and get the impedance low enough, but while sometimes done by radio hams it is rather more of an invasive change then just adding an extra little box in the wall box doings.
An alternative approach is to convert the property to TT earthing
Arguably the easy way would have been to make an EV a ground free device and just feed it with phase(s) and neutral, but I can see squabbling about EMC issues if going there.
no need to convert the property,just the circuit going outside the equipotential zone.
I have to visit Finland. Crazy, can you show some photos how this Finnish PEN looks like?Maybe the phrasing on that website is odd, but here's nothing weird about it
the PEN conductor, which is a metal cable that supports the phase conductors between poles.