Office Building Solution

BU I LDI NG SOLUT IONS

22

— Overvoltage protection

Surges are the primary cause of electronic device failure and business interruption. The most dangerous surges are caused by lightning strikes, electrical maneuvering on the distribution grid, and parasitic interference. Surge incidents and damage are of paramount importance in a world where applications that rely on electrical distribution networks and computer systems for their operation have increased dramatically.

Surge protection begins at the origin of the electrical system and ends near the most sensitive equipment. The energy of the discharges is reduced in several stages, first with the most robust arresters (Type 1), then with the finest protections (Type 2 or 3). This logic of coordination in protection is represented with the LPZ protection zones, which divide the environment according to the effect of lightning. For the purpose of protecting equipment and systems against the electromagnetic effects of the lightning current LEMP (Lightning Electromagnetic Impulse), a structure can be divided into protection zones (LPZ: Lightning Protection Zones), understood as homogeneous electromagnetic environments, not necessarily confined (by walls, floor and ceiling), but ideal, in which therefore the protection measures adopted, represented by LPS, shielding and SPDs, are homogeneous. The type of electrical and electronic installations and their vulnerability to LEMP also contribute to the identification of the various zones.

Electronic equipment is increasingly sensitive.

With the process of miniaturization of circuits and components, modern equipment is more prone than ever before to being damaged by surges. Distribution and telecommunications networks are increasingly interconnected and complex. In densely populated cities, the effects induced by lightning discharges are devastating, as they can propagate for several kilometers.

Surge protection is therefore of paramount importance.

12%

61%

Unidentified Other causes (damage, fire) Short circuit

6%

6%

Grid fault, temporary overvoltage at 50 Hz Overvoltage

15%

Damage to electronic equipment. Analysis conducted in France for the residential segment by AVIVA, the world's sixth largest insurance company

Powered by