Type 2 surge arrester 5SD74 series

remote signalingfor transient current protectionelectronic equipment

• Protects low-voltage systems against transient overvoltages • For installation downstream of lightning arresters 5SD7, type 1 in main distribution boards or subdistribution boards  • Remote signaling contact notifies whether a protection module has been disconnected from the grid by the thermal isolating arrester or whether a protection module is not plugged in • Note: It is essential to have standardized protection against lightning and voltage spikes to ensure error-free operation of photovoltaic systems! The more than one million lightning strikes in Germany every year pose a considerable risk for buildings and systems that can be damaged due to the unhindered effect of lightning currents, overvoltage and power surges. In many cases however, it is not apparent that such damage has been caused by lightning currents, overvoltage and power surges. Overvoltage results in considerable damage to electrical and electronic equipment. Even brief transients in power supply lines or between electrical lines and other conductive parts (e.g. grounded metallic parts, ground) are sufficient to cause such damage. The damage patterns of destroyed lines, circuit boards or switchgear demonstrate this. Such damage can be prevented employing suitable overvoltage protection means.