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Lightning Current SPDs

Lightning current SPDs are designed to prevent partial lightning currents from entering a structure during lightning activity. They should be installed on all cables entering or leaving a building, either where a structural lightning protection system is installed or where a building is supplied via overhead cables. Cable entry locations may be at ground, side or roof level.

The purpose of lightning SPDs is to attenuate lightning current and protect against dangerous sparking in order to minimise the risk of loss of human life (BS EN 62305 R1), the risk of loss of services to the public (BS EN 62305 R2), and the risk of loss of cultural heritage (BS EN 62305 R3). Dangerous sparking can result in fire and electric shock hazards as it presents a risk of flashover, where the voltage present exceeds the withstand rating of the cable insulation or equipment.

Lightning current SPDs should be selected in accordance with the level of lightning protection for the building as determined by the risk assessment to BS EN 62305 Part 2. The lightning SPDs should conform to the requirements of the BS EN 61643 series of documents for the 10/350┬Ás test waveform.

Please go to the surge protection section of the product catalogue or contact us for further information or assistance with your lightning current SPD requirements.

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