Surge Arresters are an essential component for increasing the reliability of the electricity network as they serve as the primary protection against overvoltage's, whether they're atmospheric and or caused by switching.
When selecting a Surge Arrester, there are several options and considerations, but the basic requirements of a Surge Arrester still remain the same;
The Surge Arrester should provide adequate protection with a sufficient safety margin, which means that overvoltage's at the device to be protected must always remain below its withstand voltage.
The Surge Arrester should be dimensioned for stable continuous operation, which means that the arrester must remain electrically and thermally stable under all conditions while handling all long-term, temporary, and transient stress resulting from network operation.
To assist with the correct selection of a surge arrester, the following information should be known
Maximum system voltage
Type of neutral (earthing) of the system/duration of failure
Lightning Impulse withstand voltage of the system
Creepage requirements/housing
Mechanical forces required
Energy absorption capability
Connections and if any additional accessories like surge monitoring
For more information or assistance in selecting you next surge arrester give myself or our friendly team a call on 1300 717 466 or +61 2 9531 6002.