Help a newbie with schematic symbols ^_^"

Discussion in 'Homework Help' started by MrSen, Jun 20, 2011.

  1. MrSen

    Thread Starter New Member

    Jun 20, 2011
    2
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    Hey all!

    Im kinda stucked here with these symbols. Does anyone have any idea?

    [​IMG]

    1. I think its a terminal, but Im not that sure, since it is connected to a circuit-breaker (which is connected to a transformator)

    2. Just to clarify, is 250A the current rating of the circuit breaker?

    3. What does this "M" stand for?

    4. What does this "C" stand for?

    5. What does this "12 of" stand for?

    6. "EG" ?

    Thanks a lot for all the help! ;)
     
  2. R!f@@

    AAC Fanatic!

    Apr 2, 2009
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    Welcome

    250A is the current capacity.

    M stands for Manual cutoff I presume
    C could be cut out

    I can't say anything abt "12 of" without seeing the whole diagram

    EG could be a an AC Motor
     
  3. MrSen

    Thread Starter New Member

    Jun 20, 2011
    2
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    Thank you for the welcome <3

    Umm heres the circuit breaker with "4 of" is just connected to a bus. The same thing with the "28 of"

    [​IMG]

    And any idea with the symbol 1? ><

    [​IMG]
     
  4. R!f@@

    AAC Fanatic!

    Apr 2, 2009
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    They could be contacts of the cutouts
     
  5. n1ist

    Active Member

    Mar 8, 2009
    171
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    The "4 of" 630A usually means that there are 4 630A breakers on that bus (and likely will show up on another diagram showing what they feed)
     
  6. R!f@@

    AAC Fanatic!

    Apr 2, 2009
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    could be.......
     
  7. payal.kellyyy

    New Member

    Mar 28, 2011
    28
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    it can also be 4of 28 means its current carrying capacity is 4%of 28A it can mean this also
     
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