PV array: Lightning protection.

Sean

Member
Joined
Oct 8, 2016
Messages
946
Following some confusion elsewhere about the use of diodes as a means of lightning protection, perhaps a separate thread might help separate and clarify.

Generally they are wired across the DC output from the array, and the ACfeed, and provide a low resistance to PE under fault conditions.


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And here's a couple of physical examples, one designed for external cabinet mounting, the other for DIN rail enclosures.


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And here's a typical combinerbox, showing string fusing, SPD & associated PE wiring along with the impressiveDC disconnect.


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daromer

Moderator
Staff member
Joined
Oct 8, 2016
Messages
5,591
The Schneider version is what I use here for each string. I took the one with an output that you can monitor :p
 
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