Arrester Cantilever Strength ?
Arrester Cantilever Strength ?
(OP)
Can someone please explain to me what cantilever strength is when talking about surge arresters (what it is, how it affects the arrester)? A link or good explanation would be appreciated.
Thanks!
Thanks!






RE: Arrester Cantilever Strength ?
The cantilever strength is the mechanical strength of the arrester, imagine the arrester in the horizontal plane similar to a diving board at the local swimming pool and at various points along it you apply a external load, the further away from the fixed end you apply the load the larger the bending moment becomes and hence an increased mechanical stress on the device.
Hope this helps
RE: Arrester Cantilever Strength ?
http://www.cablejoints.co.uk/upload/High_Voltage_S...
RE: Arrester Cantilever Strength ?
One thing to be careful of with arresters is to be mindful of supporting equipment with them. Although rare if properly applied, arresters are known to break during severe electrical stress. In this case they will lose all mechanical properties. However, this failure mode may not necessarily result in a system outage. In practice we try to insure that in the event of failure any connecting cables will hang "clear" of any obstruction that would cause a fault. And we never use an arrester for supporting other equipment.
IEEE 605 has a good write up and explanation for cantilever strength of insulators. The same would apply to arresters.
RE: Arrester Cantilever Strength ?