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Discuss The procedure for setting the thermal and magnetic overload on an MCCB?(Coursework) in the Electrical Forum area at ElectrciansForums.co.uk.

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  1. Hullaboo
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    Hullaboo Guest

    Hi there I'm Carlos.

    I'm new to this forum and I really hope I'm posting in the correct section for this question, but I really couldn't find any other section nor could I find anything when I searched for it. My question is in the title really. I've looked almost everywhere and have come to no avail, even in my Trevor Linsley books. If anyone could explain the procedure for this I would really appreciate it. :)

    I did ask my tutor, but he told me to search around. :/

    P.S: What's a common name for an Electrician...? That begins with S? I couldn't answer this question while applying... I can only think of Sapper...

    Thank you!

    Carlos.
     
  2. Amp David
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    Amp David Trusted Advisor

    Location:
    Glossop
    Re: The procedure for setting the thermal and magnetic overload on an MCCB?(Coursewor

    Spark/sparks
     
  3. PEG
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    PEG Trusted Advisor

    Location:
    Manchester
    Re: The procedure for setting the thermal and magnetic overload on an MCCB?(Coursewor

    ans ;Steven. I know 3 sparks with that christian name...
     
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  4. Amp David
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    Amp David Trusted Advisor

    Location:
    Glossop
    Re: The procedure for setting the thermal and magnetic overload on an MCCB?(Coursewor

    Always thought it was just the thermal overload you can adjust.
     
  5. Hullaboo
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    Hullaboo Guest

    Re: The procedure for setting the thermal and magnetic overload on an MCCB?(Coursewor

    Oh my, Sparky... I had a blank moment... I apologise. xD Thank you ever so much for the fast reply's. I really appreciate it, the question to verbatim is "On larger installation the use of MCCB means that you would need to set the thermal and magnetic overload to meet the requirements of the installation. Briefly describe the procedure." this really has stumped me, we've never actually discussed MCCB's in class, nor in my Level 2.
     
  6. Knobhead
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    Knobhead Guest

    Re: The procedure for setting the thermal and magnetic overload on an MCCB?(Coursewor

    It’s you’re course work, you should do it. Have a look at the Telemecanique web site and then come back with you’re answer. We’ll let you know if it’s right.

    Our purpose is not to do homework.
     
  7. Engineer54
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    Engineer54 Guest

    Re: The procedure for setting the thermal and magnetic overload on an MCCB?(Coursewor

    No way, that's a really very basic MCCB your talking about there. Check out the electronic controlled MCCB's, you can adjust virtually all the parameters including E/F. Not going to describe everything here it'll take too long, but by adjustment of parameters you can reduce a 400A MCCB down to a 160/200A MCCB. Top of the range fully adjustable MCCB's tend to be on the mega expensive side though!! ....lo!!!
     
  8. drew35
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    drew35 Guest

    Re: The procedure for setting the thermal and magnetic overload on an MCCB?(Coursewor

    You put place your finger on the switch and push up to latch. Its set.

    I was thinking, sucker, sap, $%&£head?
     
  9. Hullaboo
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    Hullaboo Guest

    Re: The procedure for setting the thermal and magnetic overload on an MCCB?(Coursewor

    The way you guys describe it just makes it seem like the procedure is done by pressing a few buttons. :3 Of course you would adjust the parameters to what your readings were through testing, but then would you just set it accordingly? So the procedure would just be to adjust it to your readings?

    Tony, I know it's not your job to do my coursework, I did tell my tutor I was going to ask on an Electrician forum though as he couldn't find the book on it, but please clarify if the procedure I write is correct when I do find the answer properly, thanks. :)

    So I could write:

    1) You need to adjust the MCCB accordingly to your readings for the system, on some MCCB's this would usually be done by turning small dials on the actual device to the required settings.

    How does that sound? Also thanks Tony, it seemed that site had some nice pictures of the actual MCCB's.
     
  10. Engineer54
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    Engineer54 Guest

    Re: The procedure for setting the thermal and magnetic overload on an MCCB?(Coursewor



    Not quite as simple as that i'm afraid, It very much depends what the MCCB is supplying/protecting, and where in the distribution system it's located. If it's an upstream breaker supplying several other MCCB's, it not only has to protect the cable(s) etc, to the downstream breakers, it also has to discriminate with them. So the settings on all MCCB's on that section of the distribution system needs to be thoroughly set-up and co-ordinated.

    Now i'm not sure why your being asked questions on an area of distribution you have not yet covered (even if on an overview basis)!! Also, my betting is that your lecturer doesn't know how to co-ordinate MCCB distribution systems, and maybe not even how to set a downstream final MCCB, if he needs to read a book on it!! lol!!!
     
  11. Geordie Spark
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    Geordie Spark Trusted Advisor

    Re: The procedure for setting the thermal and magnetic overload on an MCCB?(Coursewor

    Does anyone have an eraser I could borrow?? :joker:
     
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  12. Hullaboo
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    Hullaboo Guest

    Re: The procedure for setting the thermal and magnetic overload on an MCCB?(Coursewor

    Thank you for that descriptive definition and all Engineer, I'm currently doing a Level 3 Diploma the C&C 2357, I think I'm one of the first on it actually as it replaced the Level 3 2330. also the question is on a sheet for requirements for commissioning. I'm not really sure I need to go in as much detail as what you said but, if I'm honest I'm really not sure what most of it is yet. xD my lecturer said a lot of it will be explained later on in the course. This is my 5th week currently.

    I may have also given off that he's a bad lecturer, I honestly did not mean that at all. He's a very good lecturer/Electrician. I just doubt he would of been able to explain it to me properly. Come to think of it I think he really just wanted me to try and find out myself. I'm certain if he just said what you said to me I'd give him a sort of "o_O" look. xD

    Thank you all of you for being great!
     
  13. Engineer54
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    Engineer54 Guest

    Re: The procedure for setting the thermal and magnetic overload on an MCCB?(Coursewor

    A bit of that was sort of tongue-in-cheek, more so towards setting-up the final MCCB bit... lol!! Actually Protection Co-ordination Set-ups can be quite complicated, and not an area where a Journeyman electrician would be expected to undertake. I'm sure there are a good few industrial electricians that could set-up relatively simple, or should i say not too complicated systems, but it's generally left to experienced Engineers and/or specialist contractors on the whole...

    Still think it's a bit pointless asking such questions to a student 5 weeks into a course that will cover 18 months to 2 years!!
     
  14. Hullaboo
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    Hullaboo Guest

    Re: The procedure for setting the thermal and magnetic overload on an MCCB?(Coursewor

    xD Oh well, it's good to challenge us! I just sort of changed around what you wrote Engineer! :p he won't actually even look at it, it's just extra stuff that we can choose to fill in, just thought I'd actually do it as I do want to be a good Electrician! :) Thank you ever so much, I really appreciate it! I would consider this question answered now. :) Thank you! <3
     
  15. Engineer54
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    Engineer54 Guest

    Re: The procedure for setting the thermal and magnetic overload on an MCCB?(Coursewor

    Glad to see that your going about things the right way instead of down the fast track route, so pleased if i was of any assistance to you.
     
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