I am looking for a transformer secondary of 60 volts @ 30 amp

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  • sam_sam_sam
    Badcaps Legend
    • Jul 2011
    • 6022
    • USA

    #1

    I am looking for a transformer secondary of 60 volts @ 30 amp

    The primary voltage is 480 single phase the second voltage needed is 60 volts

    Now it could be 30 volts 0 volts 30 volts preferred

    Or it could be 60 volts 0 volts 60 volts and just use one side of

    Output amp need to be at least 30

    Dose anyone know where I can find one

    This is what is the device I am working on

    The problem with this one is that it is over heating and smelling like it is over heating

    When it has a load on it
    Attached Files
    Last edited by sam_sam_sam; 07-01-2020, 08:22 PM.
  • redwire
    Badcaps Legend
    • Dec 2010
    • 3900
    • Canada

    #2
    Re: I am looking for a transformer secondary of 60 volts @ 30 amp

    Are you sure about your specs? 60VAC 30A output is 1,800VA and about a 45lb beast. That small transformer is probably overloaded and why it is stinking.

    1,500VA control transformers are common but standard secondary voltage (like Hammond HPS Imperator) is 24V or 90V.
    I thought you could undervolt a 600V (550/575V) transformer at 480V to get your voltage, but nothing around 48V or so.

    You show 60-0-60 but want 30V so I'm confused. What is this thing powering.

    Comment

    • budm
      Badcaps Legend
      • Feb 2010
      • 40746
      • USA

      #3
      Re: I am looking for a transformer secondary of 60 volts @ 30 amp

      Waht is the VA rating of that transformer as printed on the tag.
      Never stop learning
      Basic LCD TV and Monitor troubleshooting guides.
      http://www.badcaps.net/forum/showthr...956#post305956

      Voltage Regulator (LDO) testing:
      http://www.badcaps.net/forum/showthr...999#post300999

      Inverter testing using old CFL:
      http://www.badcaps.net/forum/showthr...er+testing+cfl

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      Comment

      • sam_sam_sam
        Badcaps Legend
        • Jul 2011
        • 6022
        • USA

        #4
        Re: I am looking for a transformer secondary of 60 volts @ 30 amp

        Originally posted by redwire
        You show 60-0-60 but want 30V so I'm confused. What is this thing powering.
        Only half of the winding is being used so it is 60 volts

        The device it is hook to it was drawing 23 amps DC

        So if you have a transformer secondary that has 30 volts 0 volts 30 volts then you would have 60 volts
        Last edited by sam_sam_sam; 07-02-2020, 04:03 AM.

        Comment

        • stj
          Great Sage 齊天大聖
          • Dec 2009
          • 30928
          • Albion

          #5
          Re: I am looking for a transformer secondary of 60 volts @ 30 amp

          this is probably a good application for a switching psu!

          Comment

          • sam_sam_sam
            Badcaps Legend
            • Jul 2011
            • 6022
            • USA

            #6
            Re: I am looking for a transformer secondary of 60 volts @ 30 amp

            Maybe but here is a concern it powering a brake coil

            Here is the other concern how many amp is going to be on the 120 volts side

            Where do I find a 60 volt switching power supply
            Last edited by sam_sam_sam; 07-02-2020, 08:34 AM.

            Comment

            • stj
              Great Sage 齊天大聖
              • Dec 2009
              • 30928
              • Albion

              #7
              Re: I am looking for a transformer secondary of 60 volts @ 30 amp

              120v?
              i thought you said 480v

              if you want to drop 120v to 60v just put it through a diode to half the phase and then put a big cap on it

              Comment

              • redwire
                Badcaps Legend
                • Dec 2010
                • 3900
                • Canada

                #8
                Re: I am looking for a transformer secondary of 60 volts @ 30 amp

                Is the brake (current) the same as always? I have seen brake solenoids fail with shorted turns, which causes current to go way high. 1.4kW is a huge brake!

                At 23A and 60V whatever is switching that is under a lot of stress.
                There are 60VDC 20A SMPS https://www.aliexpress.com/item/4000402859916.html
                It might be better to use more than PSU in parallel for safety, if the brake operation is critical. SMPS won't last as long as iron.

                Comment

                • budm
                  Badcaps Legend
                  • Feb 2010
                  • 40746
                  • USA

                  #9
                  Re: I am looking for a transformer secondary of 60 volts @ 30 amp

                  What is rectification scheme?
                  Attached Files
                  Never stop learning
                  Basic LCD TV and Monitor troubleshooting guides.
                  http://www.badcaps.net/forum/showthr...956#post305956

                  Voltage Regulator (LDO) testing:
                  http://www.badcaps.net/forum/showthr...999#post300999

                  Inverter testing using old CFL:
                  http://www.badcaps.net/forum/showthr...er+testing+cfl

                  Tear down pictures : Hit the ">" Show Albums and stories" on the left side
                  http://s807.photobucket.com/user/budm/library/

                  TV Factory reset codes listing:
                  http://www.badcaps.net/forum/showthread.php?t=24809

                  Comment

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