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MOV and GDT in EVSE for residential applications - 1 phase and 3 Phase EVSE

Shamith Gambhir

In an EVSE hardware for European market such as EV Box, Easee, Zaptech pro i was not able to find any MOV in the Power line L1, L2, L3.

Also MOV was absent between Neutral to Earth.

For North American Market and Indian Market, i see MOV added between L1 - N, L1-E, L2- E, L3-E and N-E.

So for European region, How does the EVSE clamp transient surges  from sources such as lightning, inductive load switching, or capacitor bank switching.

Any thoughts on this ?

  • 0

    UK wirings regs typically require sure protection devices as part of the fixed installation (where necessary)- e.g. within distribution boards, so unless the appliance is particularly susceptible to surges there's often no need for local SPDs. I suspect other European countries are similar. Compared with much of the world, the UK isn't particularly high risk anyway. Generally a tiered approach to surge protection works better than local protection alone, as massive surges (e.g. for lightning) can be handled closer to the origin of the installation, with finer protection downstream, so vulnerable items within the installation (e.g. RCDs) also have some protection.

       - Andy.

  • 0

    You will already have provided the SPD in the consumer unit when you do the install.  So they don't need to.

  • 0 in reply to Simon Barker
    Simon Barker said:
    You will already have provided the SPD in the consumer unit when you do the install.  So they don't need to.

    Provided the equipment meets the relevant Installation Overvoltage Category, of course. Sometimes these devices are required to achieve that, but it depends on the selected electronic components. But all of that is nothing to do with the electrical installation, but the EVSE itself, and conformity with the product standard, and Electrical Equipment (Safety) Regulations and EMC Regulations (LV Directive and EMC Directive in the EU).

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