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13A EV socket

lyledunn
TNCS system in local development. Second hand BMW 330E Hybrid with ICCB that appears to restrict charging to 6A. Owner wants 13A socket on outside wall of house. 

The area is near the Mourne mountains where an Ra of 200 ohms would be difficult to achieve with a single rod. In any event the driveway has just be nicely finished. It would be a simple matter of drilling through the back of the meter cupboard to provide  the 13A socket but it is the loss of neutral protection that is the problem. Anyone know if loss of neutral protection is available as a separate item?
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    That is an interesting idea - in effect you are suggesting monitoring electrode current at the substation. I am not sure about this, as part of normal operation will involve quite a bit of electrode current even when there is no fault, as the earth path is in parallel with the neutral, depending a bit on phase balance, and things like how local water pipes are arranged. However I take the point that in fault the electrode current at substation, and at other places as well  will rise relative to the normal case and a  sudden step could be reported as needing investigation, if not an immediate trip. It would require telemetry from substation back to some central HQ, I'm not sure if projects to add telemetry (e.g, https://www.ashwireless.com/pages/35-substation-temperature-monitor)

    could easily be augmented to phone home with additional parameters. You may need to find a way of putting current transformers around the mounting bolts of some large lumps of steel as well, not all transformers are on wooden poles with an easily identifed LV earth wire coming down the side.

    You could extend the idea and telemeter the current flowing into the bonding conductors at preemies with a smart meter..

    I fear there is no appetite for such cunning however, the idea is to keep the existing running as long as possible.
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  • 0
    That is an interesting idea - in effect you are suggesting monitoring electrode current at the substation. I am not sure about this, as part of normal operation will involve quite a bit of electrode current even when there is no fault, as the earth path is in parallel with the neutral, depending a bit on phase balance, and things like how local water pipes are arranged. However I take the point that in fault the electrode current at substation, and at other places as well  will rise relative to the normal case and a  sudden step could be reported as needing investigation, if not an immediate trip. It would require telemetry from substation back to some central HQ, I'm not sure if projects to add telemetry (e.g, https://www.ashwireless.com/pages/35-substation-temperature-monitor)

    could easily be augmented to phone home with additional parameters. You may need to find a way of putting current transformers around the mounting bolts of some large lumps of steel as well, not all transformers are on wooden poles with an easily identifed LV earth wire coming down the side.

    You could extend the idea and telemeter the current flowing into the bonding conductors at preemies with a smart meter..

    I fear there is no appetite for such cunning however, the idea is to keep the existing running as long as possible.
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