The system for protecting a building against the effects of lightning must include:
=protection of structures against direct lightning strokes;
=protection of electrical installations against direct and indirect lightning strokes.
The basic principle for protection of an installation against the risk of lightning strikes is to prevent the disturbing energy from reaching sensitive equipment. To achieve this, it is necessary to:
=capture the lightning current and channel it to earth via the most direct path (avoiding the vicinity of sensitive equipment);
=perform equipotential bonding of the installation;
This equipotential bonding is implemented by bonding conductors, supplemented by Surge Protection Devices (SPDs) or spark gaps (e.g., antenna mast spark gap).
=minimize induced and indirect effects by installing SPDs and/or filters.Two protection systems are used to eliminate or limit overvoltages: they are known as the building protection system (for the outside of buildings) and the electrical installation protection system (for the inside of buildings).
A surge protective device (SPD) is designed to protect electrical systems and equipment from surge events by limiting transient voltages and diverting surge currents. Surges can originate externally, most intensely by lightning, or internally by the switching of electrical loads. The sources of these internal surges, which account for 65% of all transients, can include […]
The Importance of Surge Protection Devices The capacity of a PV array is directly related to its exposed surface area, so the potential impact of lightning events increases with system size. In the area that lighting occurrences are frequent, unprotected PV systems could suffer repeated and significant damage to key components. It results in substantial […]
Surges may be caused by an indirect lightning strike but, the majority are caused by equipment being turned on or off within a facility. These surges damage components costing money to repair or replace as well as create unplanned downtime resulting in unfulfilled orders, missed deadlines, unreliable systems and/or dangerous situations. The GHX Surge Protective Device (SPD) Series for […]
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