Connect with us

Any 3 phase transformer experts please?

Discussion in 'General Electronics Discussion' started by midyo, Aug 7, 2014.

  1. midyo


    Aug 7, 2014
    Hi, I'm fairly sure this transformer is to transform 3 phase 415 to 240 and 110 but how do you wire it? There are no more connections other than waht you see? It belongs on a milling machine which has all 3 voltage motors on it, a small 110 motor, a very small 240 motor and 2 bigger 415's. Any help greatly needed. thanks


    Attached Files:

  2. Harald Kapp

    Harald Kapp Moderator Moderator

    Nov 17, 2011
    Welcome to our forum, Midyo.

    I doubt this is a three phase transformer. You'd have 3 input wires and for each output voltage 3 output wires. This makes 9 wires for 415V input and 110V and 240V output.
    Also a three phase transformer doesn't convert three phases into one phase, but the image shows only one connection (aka phase) for each voltage.

    So I'm fairly sure this is a single phase transformer. You probably connect one phase of the 415V to the transformer to step down to the 2 output voltages.

    The best thing would be to find a schematic wiring diagram of the milling machine. Otherwise remote diagnostic with this little information is difficult, to say the least.
  3. midyo


    Aug 7, 2014
    Ah, thanks Harald. I think I understand it now, I didnt realise you could just use one of the phases to step it down to 220/110. I asumed all 3 phases would have to be connected.
Ask a Question

Want to reply to this thread or ask your own question?

You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.
Similar Threads
There are no similar threads yet.
Electronics Point Logo
Continue to site
Quote of the day