Transformer connections confused

Discussion in 'The Projects Forum' started by Kskinky8, Jun 16, 2015.

  1. Kskinky8

    Thread Starter New Member

    Jun 16, 2015
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    This is a transformer I took out of a 1000 w inverter rest of it is junk how do I connect this transformer up , which wire is what ? Many thanks
     
  2. Reloadron

    Active Member

    Jan 15, 2015
    963
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    There is no easy answer. The thicker gauge wires are likely the primary but you make no mention of inverter type or voltages? The lighter gauge wires are likely the secondary and possibly center tapped. You have what looks to be a meter sitting there, have you taken any resistance readings? How to connect the transformer depends on what you want to do with the transformer?

    Ron
     
  3. AnalogKid

    Distinguished Member

    Aug 1, 2013
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    You already know the answer. When you took it out of the inverter, which side was connected to the output and which side was connected to the drivers?

    ak
     
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  4. Kskinky8

    Thread Starter New Member

    Jun 16, 2015
    13
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    24volts and the two thick wires went on heatsinks
     
  5. MaxHeadRoom

    Expert

    Jul 18, 2013
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    The black wire looks like it is connected to a internal device, possibly a thermal fuse, if so this would make it on the pri side, usually.
    Max.
     
  6. Kskinky8

    Thread Starter New Member

    Jun 16, 2015
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    Thanx
     
  7. MaxHeadRoom

    Expert

    Jul 18, 2013
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    Just remembered, Another clue for primary, it is the first or centre-most winding generally.
    Max.
     
  8. Kskinky8

    Thread Starter New Member

    Jun 16, 2015
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    No matter which two wires I connect to a 12v battery it shorts out the two thick wires went to heatsinks and the three thin ones just went on te circuit board as well
     
  9. MaxHeadRoom

    Expert

    Jul 18, 2013
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    Are you connecting DC to a transformer?
    If so you need AC to operate.
    Max.
     
  10. Kskinky8

    Thread Starter New Member

    Jun 16, 2015
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    To test it yes scared I'm gona blow it with ac
     
  11. MaxHeadRoom

    Expert

    Jul 18, 2013
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    On DC it is a virtual dead short.
    They are designed to operate on AC only.
    Max.
     
  12. Kskinky8

    Thread Starter New Member

    Jun 16, 2015
    13
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    Will do that thank you that helps a lot
     
  13. Kskinky8

    Thread Starter New Member

    Jun 16, 2015
    13
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    Even on ac any two wires trips the mains
     
  14. Reloadron

    Active Member

    Jan 15, 2015
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    The idea is to apply a low voltage AC and not direct mains. Low voltage AC or a pulsed DC to what should be the primary side assuming this transformer is out of an inverter.

    Ron
     
  15. shortbus

    AAC Fanatic!

    Sep 30, 2009
    4,006
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    Aren't you guys forgetting this was from an inverter? the "primary" would only be rated for 24V(according to T/S) and probably the one with three wires. And center tapped like Reloadron said, from a push-pull driver. The "secondary" would be the two wire one and a high voltage. Wouldn't it ?
     
  16. Reloadron

    Active Member

    Jan 15, 2015
    963
    232
    I gave that some thought. Problem I have is looking at the picture there looks to be two heavy leads and only two. Figuring inverter I wanted to make that the higher current side primary. I did ask the OP to try a few basic DC resistance measurements which he apparently didn't do but did try mains power to the existing leads and managed to trip a breaker. Finally "Mains Voltage" is always an interesting term. Like I would know what his "mains voltage" is? I know yours only because I know you are down the road from me. :)

    I haven't a clue what this inverter was either? What maybe 12 or 24 VDC to 120 or 240 VAC? True Sine or Modified Sine? Nice looking transformer though and I like the wire colors. :)

    Ron
     
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  17. Kskinky8

    Thread Starter New Member

    Jun 16, 2015
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    Hi its 24dc to 220ac I tried DC measurements but it imediatly shorts out with eighter windings , next try is going to be low ac voltage input .... Somehow no idea how I'm going to make 220 lower ,its a hobby and would be a shame to waste such an Awsome transformer
     
  18. Kskinky8

    Thread Starter New Member

    Jun 16, 2015
    13
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    O yes modified sine wave
     
  19. Kskinky8

    Thread Starter New Member

    Jun 16, 2015
    13
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    Which one would be centre ? The yellow ? Tried that and didn't go so well:)
     
  20. Ramussons

    Active Member

    May 3, 2013
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    Can you feed a 12 Volts (or 9 or 6 or 15 ...) AC across the RED-BLUE wires and measure the voltage across the other side Black-Yellow_Blue wires?
     
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