991.115
03/99
Application Note
TAN 1005
Surge Suppression for Zone 0 Locations
Synopsis
This note discusses the surge protection requirements of intrinsically safe circuits entering a Zone 0 hazardous area. It analyses the potential gradients generated by lightning strikes and their possible routes of invasion. The alleviation of the problem at the zone 0 interface transfers the problem elsewhere and an adequately safe pragmatic solution is proposed.
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Telematic