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Three Phase RCD & MCB Wiring?

Nano Brewery
Please could somebody advise on the most cost effective procedure of wiring up RCDs & MCBs on a DIN Rail for independent circuit protection.  Tried Googling to no joy.  Plenty of Single Phase advice, images, videos.  If using 4 Pole MCBs & RCDs, would I be correct in assuming that similar to single phase, it's just a case of Busbar-ing the MCB Lives to the RCD Lives and taking the RCD to Neutral Bar?


Have seen diagrams (like below) where the Incoming L1, L2, L3 get split to separate DP MCBs, RCDs and SP MCBs for each phase.  Seems like a bit of a faff and a pricey option (3x DP MCBs + 3x RCDs + 3x SP MCBs) per circuit.


I have 3x Three Phase Circuits (13A, 40A, 48A) that I wish to protect independently with RCDs.


Thanks in advance!  Dan.

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    mapj1:

    no -it isn't you need a box fitted with a proper 3 phase busbar, which is really  3 or 4 isolated busses in one block

    Each maker has (slightly incompatible) variations on the theme.

     


           

     




    Ah I see! ?  Are these adjustable length wise like normal Busbar's?  Thanks for sharing.


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  • 0
    mapj1:

    no -it isn't you need a box fitted with a proper 3 phase busbar, which is really  3 or 4 isolated busses in one block

    Each maker has (slightly incompatible) variations on the theme.

     


           

     




    Ah I see! ?  Are these adjustable length wise like normal Busbar's?  Thanks for sharing.


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