B
Brians6
I know this is a U.K. site but I'm hoping someone will be able to answer a qn. Recently I saw a that a company was producing a remote disconnect safety system for PV panels mounted on a roof.This is to disconnect the arrays automatically if the mains is disconnected or manually after a storm or fire. Because the coils are only ELV, only safety ELV will be on the roof once they are disconnected. The units are worth a fortune but they are just a 24 volt contactor in a box with connectors so that you can just fit it inline at the panels. I am reasonably familiar with contactors although it is some years since I did a lot of hands on work. I will be using some Sprecher CA7s for a contactor based genset changeover system in the near future so I've been looking up their specs & I have a range of their parts etc. My biggest array has the specs on the switchboard listed as 412V at 11.2 amps. I know this is DC & for safety it would be necessary to break both the positive & negative output leads. The trouble is I haven't ever worked with DC contactors & I can't seem to find DC specs for contactors. Of course, I may be looking in all the wrong places. Does anyone know what the DC load break specs for Sprecher CA7s are or can you suggest breakers designed for DC. Regards, Brian.