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EV charging Pillar -is a surge protection device required?

Martin Burton

As a manufacturer of ac EV chargers, our pillar is an aluminium tube made for car parks.

Is a surge protection device a requirement or a recommendation?

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  • +1

    BS 7671's current stance is that "protection against transient overvoltages shall be provided unless the owner of the installation declares it is not required due to any loss or damage being tolerable and they accept the risk of damage to equipment and any consequential loss" - so I guess that boils down to a recommendation as far as SPDs in the installation are concerned.

    I don't know if EVs could produce switching overvoltages (being relatively large current loads), if so SPDs might still need to be considered.

    If the charge points are connected to a different Earthing system from the main installation (e.g. on a TT island, from a TN main installation) then any SPDs in the main installation may not adequately protect the charge point/EV so might have to be repeated.

    I'm not sure if the equipment standard for charge points (BS EN 61851?) has any requirements for SPDs within the equipment itself.

         - Andy.

Reply
  • +1

    BS 7671's current stance is that "protection against transient overvoltages shall be provided unless the owner of the installation declares it is not required due to any loss or damage being tolerable and they accept the risk of damage to equipment and any consequential loss" - so I guess that boils down to a recommendation as far as SPDs in the installation are concerned.

    I don't know if EVs could produce switching overvoltages (being relatively large current loads), if so SPDs might still need to be considered.

    If the charge points are connected to a different Earthing system from the main installation (e.g. on a TT island, from a TN main installation) then any SPDs in the main installation may not adequately protect the charge point/EV so might have to be repeated.

    I'm not sure if the equipment standard for charge points (BS EN 61851?) has any requirements for SPDs within the equipment itself.

         - Andy.

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