Surge protection has always been covered in depth within BSEN62305-4, the current UK lightning protection standard. However, recent amendments of BS7671 and the forthcoming amendments have increased awareness of surge protection devices
Here we take a look at some of the important criteria when selecting SPD’s such as ensuring the correct type of SPD and its kA rating are selected in accordance with the standards.
There are three types of SPD’s defined in BSEN62305 and EN61643-11. Additionally, combined SPD’s have the distinct advantage of offering both Lightning protection and surge protection in one SPD.