 Lightning protection
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 GDK protects your building and your electrical installation against lightning effectsThe lightning conductor: your external protection The lightning conductor protects against the direct impact of thunder. A lightning conductor installation in a ‘chain-mail cage’ comprises: - A capturing device including air termination network (chain-mail metallic conductors, rods, wires) destined to receive the thunderclaps - Downward conductors establishing the connection between the sensors and the earthing unit and destined to direct the current from the thunder towards the ground. They are set at a maximum of 20 metres apart - Earthing installations made up of earthing electrodes buried vertically in the ground and possibly an earthing loop connecting the earthing devices (total earth resistance maximum 5 Ohms). The earthing devices are designed to disperse the current from the thunder throughout the ground. The electronic systems protection (ESP): your internal protection This type of installation consists of protecting electric and electronic equipment against thunderclaps in the neighbourhood. Their indirect effects can spread over a distance of several kilometres! These current surges are conducted by all incoming and outgoing cables: electricity, telephone, coaxial, signalling, earthing etc. Internal protection against thunder comprises: - several lightning protectors and barriers placed in the electrical boxes and close to sensitive apparatus (TV’s, computers, multi-media…) - a single good earthing unit. The installation of an internal lightning conductor is indispensable when an exterior lightning conductor is in place. |
