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 44 replies
  • Subscribers 32 subscribers
  • Views 6347 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

Are RCD's Required?

Nano Brewery
Hi, looking to understand if an RCD would be a required regulation (and/or just highly recommended) in the following situation.  The additional cost of installing four or five 3-Phase RCDs is quite substantial and I would prefer to avoid it if still deemed as safe and not legally required.  Earthing system is TN-C-S.


For connecting up 4x Immersion Elements (9kW, 9kW, 6kW, 3kW) in Brewery Tanks I am looking at either:


A.  SWA Cable clipped direct to basket from the Control Panel to IP rated Plugs/Sockets mounted on the wall.  Then floating SY Cable (recommended by electrician) from the wall to the Tanks, which is about a 2m run.  Thinking Plugs/Sockets just to make life easy if I ever want to move things around and also for easier access for cleaning.


B.  Same as above but swapping the Plugs/Sockets for Isolators.


Look forward to your feedback and opinions.  Cheers.
Parents
  • 0
    Chris Pearson:
    AJJewsbury:
    switched via PID for temperature control

    How does the PID (proportional–integral–derivative) temperature controller vary the power? If it's chopping the a.c. waveform (like a big dimmer) as I understand some do - I'd be very wary of putting RCDs downstream of it.


    Andy, I think that you meant upstream.




    This time I did mean what I wrote ? - there have been suggestions for individal RCDs (RCCBs or RCBOs) for each immersion heater - which would have to go downstream of the controller. I really don't like the idea of feeding an RCD a non-sinusoidal supply (the potential for the residual current being non-sinusoidal is another issue).


       - Andy.


Reply
  • 0
    Chris Pearson:
    AJJewsbury:
    switched via PID for temperature control

    How does the PID (proportional–integral–derivative) temperature controller vary the power? If it's chopping the a.c. waveform (like a big dimmer) as I understand some do - I'd be very wary of putting RCDs downstream of it.


    Andy, I think that you meant upstream.




    This time I did mean what I wrote ? - there have been suggestions for individal RCDs (RCCBs or RCBOs) for each immersion heater - which would have to go downstream of the controller. I really don't like the idea of feeding an RCD a non-sinusoidal supply (the potential for the residual current being non-sinusoidal is another issue).


       - 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