Data and information technology systems are used in many different applications. Almost every electronic system used to process information is considered extremely important. Ever increasing volumes of data are being stored and must be accessible at all times at very short notice. It has become even more important to protect these systems too against dangerous surges. In order to prevent failure or even destruction of these systems, they must be integrated into the lightning and surge protection concept.
The lightning protection equipotential bonding represents internal lightning protection in the building. When lightning strikes, a voltage drop occurs at the earthing resistor, producing dangerous voltage differences between the metal building components and the power and data cables, which need to be prevented. The equipotential bonding connects together all metal installations (gas and water pipes, etc.), electrical systems (power and data cables), the lightning protection system and the earthing system, either directly or via lightning current arresters (SPD type 1 or type 1+2). Surge protection devices (SPDs) can guarantee a voltage limitation according to the insulation coordination.
For architectural reasons, it is often not possible to maintain the required separation distance in contemporary buildings. In these cases, and in industrial plants, the high-voltage-resistant, insulated isCon® conductor enables compliance with IEC62305 ( VDE0185-305 ) 62305 and offers an equivalent separation distance of 0.75 m in air and 1.5 m in solid materials.
Metallic installations can be used as natural components of a down-conductor system, provided that: • Electrical continuity is permanent, • Their dimensions correspond at least to the values for standardised conductors (Table 2.6). • Pipelines with combustible or explosive contents are not permitted, if the seals in flange couplings are not connected so that they are electrically conductive.