Please help in hardwiring metal halide bulb system.

Discussion in 'The Projects Forum' started by lexgen2004, Mar 3, 2014.

  1. lexgen2004

    Thread Starter New Member

    Mar 3, 2014
    5
    0
    Hello everyone,

    I have just received two older projectors with incompatible bulbs. I need to hard wire a separate circuit for the bulb etc.

    My salvaged parts are a
    HTP 1806 metal halide 150w/10k

    HTP Electronic ignitor Model: CD-7
    220v~240v/50~60hz, for MH lamp 70~400w
    lb max.7A

    SH-JLZ150 ballast
    GB-19510, GB-17743
    MHL: 150W
    Un: 220V-50Hz
    tw130, Δt70
    imains 1.80A

    15A 250W electronic power in (on off switch takes pc type plug)

    Any help would be amazing and appreciated.
     
  2. #12

    Expert

    Nov 30, 2010
    16,348
    6,839
    The basic principle is that the inductor limits the current as Xl = 2 Pi F L
    You must make the inductor large enough to limit current from the power line to the current the bulb requires. Do not consider the impedance of the bulb in calculating the inductor. The inductor goes first, in series with everything else. One end of the ignitor connects between the inductor and the bulb, the other end going to the other side of the power line, along with one end of the bulb.
     
  3. lexgen2004

    Thread Starter New Member

    Mar 3, 2014
    5
    0
    hi #12,
    Thanks for the reply. My physics tutor would kill me but I'm lost lol.
    Essentially I have everything setup apart from the switch to positive ballast and switch to neutral igniter, do I need anything inbetween?
     
  4. #12

    Expert

    Nov 30, 2010
    16,348
    6,839
    I can't see, "everything" from here. You should post a drawing.
     
  5. lexgen2004

    Thread Starter New Member

    Mar 3, 2014
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  6. tcmtech

    Well-Known Member

    Nov 4, 2013
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    lexgen2004 likes this.
  7. lexgen2004

    Thread Starter New Member

    Mar 3, 2014
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    Thanks tcmtech, lot of reading lol. I'm getting quite close to just connecting up what I've got and hoping for the best lol.
     
  8. lexgen2004

    Thread Starter New Member

    Mar 3, 2014
    5
    0
    Cheers mate, that really helped, all working now :)
     
  9. #12

    Expert

    Nov 30, 2010
    16,348
    6,839
    A bit late to say this now but, going to "User CP" and adding what country you are in would help us figure out what configuration of power you have available. I never did figure out whether you have a center zero with a pair of 110V supplies or just the 220V.
     
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