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Is it still necessary to install a lightning protection grid when the DO output of DCS is isolated by relays?

2012-10-12View Original

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When the DO output of DCS is isolated by a relay, is it still necessary to install a lightning protection grid?
Reply #22012-10-12
Generally not required, but it is needed in open areas
Reply #32012-10-12
It’s not necessary; relays already provide a certain level of isolation, and it would also increase costs.
Reply #42012-10-12
Generally, it’s not necessary; relays already provide isolation, so lightning signals should not be able to get into the system. You can add lightning protection on the instrument side, though, if there are frequent lightning strikes and the situation is dangerous. Calculate the cost.
Reply #52012-10-13
Generally, no – the relay has already provided isolation

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Translated at 2026-07-26 04:48:43

Original: https://bbs.hcbbs.com/thread-1070528-1-1.html

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