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Electrician Talk Forum
Surge protection, SPDs and LiVE products
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<blockquote data-quote="Sidewinder" data-source="post: 479708" data-attributes="member: 9512"><p>AFDD’s are not a goid idea imho.</p><p></p><p>Surge protection I am more keen on.</p><p></p><p>[USER=20864]@Tony S[/USER], think about the MOV’s you used to have on the AC contactor coils which were connected straight from a PLC output card.</p><p></p><p>If they failed then the cards didn’t last much longer did they?</p><p></p><p>They are surge protection for the output card effectively, because of the back emf generated by the collapsing fields of the coil.</p></blockquote><p></p>
[QUOTE="Sidewinder, post: 479708, member: 9512"] AFDD’s are not a goid idea imho. Surge protection I am more keen on. [USER=20864]@Tony S[/USER], think about the MOV’s you used to have on the AC contactor coils which were connected straight from a PLC output card. If they failed then the cards didn’t last much longer did they? They are surge protection for the output card effectively, because of the back emf generated by the collapsing fields of the coil. [/QUOTE]
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Surge protection, SPDs and LiVE products
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