Contactor coil 12V DC

Discussion in 'General Electronics Chat' started by abdtk, Mar 10, 2007.

  1. abdtk

    Thread Starter New Member

    Mar 10, 2007
    3
    0
    HI every 1 i,m new here and want to know some kind of solution for "Telemecanique" contactor its coil volts mention 24V when i applied 12V DC by car battery after 15 minute it become too hot , i wish to use it atlest 2 hour duration, please let me know how i can?
    =
     
  2. beenthere

    Retired Moderator

    Apr 20, 2004
    15,815
    282
    Apply 24 volts to the coil. It needs a certain level of power - a function of voltage and current - to function. With only 12 volts applied, the current draw will be too high. The coil will overheat.
     
  3. Gadget

    Distinguished Member

    Jan 10, 2006
    613
    0
    Most contactor coils are designed for AC operation, not DC.... an Important consideration, as using DC on a coil designed to work on AC will normally fry it.
     
  4. abdtk

    Thread Starter New Member

    Mar 10, 2007
    3
    0
    Hello All respectful members,
    Thanks for reply, do you please guide me how can i convert this 24V coil to 12V DC coil, because the 12V dc coil is not available localy.
    The contactor type, Telemecanique. CA2-DN1319-A65.
    Thanks and waiting for earlier reply
     
  5. thingmaker3

    Retired Moderator

    May 16, 2005
    5,072
    6
    It will be far more easy to modify the power supply than to modify the coil.
    If it is a coil rated for 24Vdc (not 24Vac), then you can put two 12V batteries in series. If it is a coil rated for 24Vac (not 24Vdc), you will need a 24Vac source. Never hook up a 24Vac coil to a 24Vdc source - it will draw 41% more current than it is rated for!
     
  6. wireaddict

    Senior Member

    Nov 1, 2006
    133
    0
    Make sure your contactor was made for DC, not AC as mentioned earlier. If it's a DC type then contact your nearest Telemecanique distributor; they should be able to get a 12 V coil for it.
     
  7. abdtk

    Thread Starter New Member

    Mar 10, 2007
    3
    0
    Hi,
    The voltage on contactor are as, 20V/50HZ, 24V/60HZ so it is pointing as AC coil not DC, i,m looking to use for 12V Dc coil, so hoow can i ?
     
  8. thingmaker3

    Retired Moderator

    May 16, 2005
    5,072
    6
    All you need to do is find a way of converting your 12Vdc battery supply into a 60Hz, 24Vrms supply. Then you will be able to use the coil you have. Another option is to get a different coil, one that is rated for 12Vdc.
     
  9. wireaddict

    Senior Member

    Nov 1, 2006
    133
    0
    I doubt if you could get just a 12 VDC coil that would fit &, if so, the armature & stator core sections wouldn't work as efficiently. The core pieces are laminated for AC & should be solid for DC. So it looks like you have just 2 choices: get or build a 12 VDC to 20 VAC, 50 Hz. or 24 VAC, 60 Hz. inverter for the coil or get a DC contactor with a 12 VDC coil.
     
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