The main objective of the electrical installation protection system is to limit overvoltages to values that are acceptable for the equipment.

The electrical installation protection system consists of:

=one or more SPDs depending on the building configuration;

=the equipotential bonding: metallic mesh of exposed conductive parts.

Implementation

The procedure to protect the electrical and electronic systems of a building is as follows.

Search for information

=Identify all sensitive loads and their location in the building.

=Identify the electrical and electronic systems and their respective points of entry into the building.

=Check whether a lightning protection system is present on the building or in the vicinity.

=Become acquainted with the regulations applicable to the building’s location.

=Assess the risk of lightning strike according to the geographic location, type of power supply, lightning strike density, etc.

Solution implementation

=Install bonding conductors on frames by a mesh.

=Install a SPD in the LV incoming switchboard.

=Install an additional SPD in each subdistribution board located in the vicinity of sensitive equipment (see Fig.1).