Rules and Guidelines
Want to participate in the discussions? Please read our Community Rules and Guidelines. Need some help? Visit Support and Answers.

  • State Not Answered
  • Locked Locked
  • Replies 17 replies
  • Subscribers 26 subscribers
  • Views 1198 views
  • Users 0 members are here
Options
You may also be interested in
This discussion is locked.
You cannot post a reply to this discussion. If you have a question start a new discussion

RCBO In Distribution Board or Isolator With RCD?

Nano Brewery
I'm trying to decide which would be the most suitable and sensible option? 


I have a Control Board that will be switching 4x 3-Phase Immersion Elements.

9kW

9kW

6kW

3kW


Control Board has Rail Mount Fuse Holders & Contactors installed for each circuit.


My question is would it be better to have a suitably rated RCBO installed in the Distribution Board which will be feeding the Control Board or should I go with downstream Isolators with RCD's?  I'm leaning towards the later as I would have separate RCD protection on each circuit.


Look forward to your feedback.  Cheers, Dan.

Parents
  • 0
    What does this control panel do? If there are any electronics in there then that might have an implication for RCDs - especially if it might try to regulate things by chopping the AC waveform to the heaters.


    Will all the elements be on the same item of equipment? (I'm just wondering if it makes more sense to mount the control panel along with the heaters on the (movable) equipment and then have a single lead to a wall socket (which would presumably then be rather a large one >>32A and so perhaps not be subject to the 30mA RCD requirement).


    What do the control panel manufacturer's installation instructions say?


    If there are unknowns my gut feeling would be for a single RCD upstream of the controller, with some means to isolate individual elements so that if one goes faulty it can be isolated and the RCD reset to allow the others to continue to to work - but as before there are lots of factors many of which I can't see from here so don't take that as a recommendation.


       - Andy.
Reply
  • 0
    What does this control panel do? If there are any electronics in there then that might have an implication for RCDs - especially if it might try to regulate things by chopping the AC waveform to the heaters.


    Will all the elements be on the same item of equipment? (I'm just wondering if it makes more sense to mount the control panel along with the heaters on the (movable) equipment and then have a single lead to a wall socket (which would presumably then be rather a large one >>32A and so perhaps not be subject to the 30mA RCD requirement).


    What do the control panel manufacturer's installation instructions say?


    If there are unknowns my gut feeling would be for a single RCD upstream of the controller, with some means to isolate individual elements so that if one goes faulty it can be isolated and the RCD reset to allow the others to continue to to work - but as before there are lots of factors many of which I can't see from here so don't take that as a recommendation.


       - Andy.
Children
No Data

Join us to get the best from IET EngX.

Joining EngX lets you personalise your experience so you stay up to date on the topics that interest you, plus you’ll be able to make connections who are looking to collaborate, exchange ideas and more.

Join us Not now

Community Rules & Guidelines