?Why surge protection

External lightning protection alone cannot provide complete safety.It only protects against fire and other damage to the building. But it cannot prevent destroying power from a nearby lightning strike get into the house via electric mains. This may damage electronic devices or cause smouldering fires.
Another typical cause for disfunction of electronic devices and information technology systems are switching operations in the power supply network.

Remember that the most aggravating danger concerns not only households but also companies which are dependent on fully functioning technical systems. Powerful information networks are the backbone of our modern industrial society.Failures of such systems may cause severe damage and losses or may even lead to a company's bancruptcy.
The cause for disturbances of those information technology systems are multifarious. Reports of electronic Insurance companie's show alarming numbers: More than 30% of the damage have been caused by electromagnetic interferences.
The "Regulations on Electromagnetic Compatibility of Equipment (EMC Regulations)" came into effect on January 1st 1996. They contain provisions for trouble-free operation of electrical and electronic systems.The current state of the art permits effective protection measures for installations and systems against the effects of lightning discharges and surges due to different causes.
Lightning Current Arresters / Surge Arresters
According to their different tasks the protective devices are divided into "Lightning Current Arresters" and "Surge Arresters".In order to maintain complete protection in the field of surges have to be taken into consideration "Power Supply Systems" as well as "Information Technology Systems".
Red/Line · Surge protection - Power Supply
Red/Line products offer comprehensive protection to the power supply side provided there is an external lightning protection installation.

Lightning current arresters (Class B/I) are installed inside the distribution board. They protect low-voltage installations against surge voltage also in case of direct lightning strikes.
Surge arresters (Class C/II) are installed in the sub-distribution board. They provide protection against surge voltages due to distant lightning strikes or peak voltages arising in the electrical power system.A decoupling element must be installed for subsequent installation of lightning current arrester and surge arrester with cable lengths under 15 metres.Surge protection devices (Class D/III) are installed at the terminal equipment absorbing the residual energy and providing protection against surges due to internal switching operations.
Coordinated installation of lightning current arresters and surge arresters in power supply systems.