Surge protection

GMI Products

The phenomenon of overvoltages is caused by electrical operations on the distribution line, parasitic interference, short-circuit current interruptions, ground faults and above all by direct or indirect lightning strikes occurring during thunderstorms. Lightning strikes, indeed, are violent discharges that produce very brief high-intensity currents that can exceed 200 kA. To prevent risks, lightning ground strikes need to be detected using instruments that are sensitive to the electromagnetic field generated by the lightning current. On the other hand, the increasing popularity of electrical and electronic equipment that is sensitive to overvoltages in low-voltage networks has made it even more crucial to adopt increasingly efficient protection systems. Faults caused by overvoltages can in fact lead to losses of service, data and productivity whose costs far outweigh those of any protective equipment.

Surge Protection Devices (SPDs), also known as “surge arresters”, are designed to protect electrical systems and equipment against transient surges and spikes. Transient surges consist of a short-term voltage peak (less than one millisecond), which can reach...

Click 'More info' to read more.