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Dynasty 400 on single phase actual input.

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  • Dynasty 400 on single phase actual input.

    I just bought a Dynasty 400 and am not happy with the input spec from the manual... What is the amp draw 230 volt single phase when maxed out at 400 amps.
    They show the amp draw under specifications as 47 amps when welding at 250 / volts 60% duty cycle, if I only needed 250 amps I would have gotten a 250 synchrowave......., but I need 400 amps, I'm killing my poor little 300 amp Dynasty welding 1" aluminum plate....., with preheat of course.

    My guess is closer to 85 amps when maxed out at 400 amps with a 5% duty cycle.

    I've been welding a lot of thicker aluminum lately so its easy to get close to maxing out the duty cycle.

    The plug that I've been using is a 60 amp Russell & stoll plug.

  • #2
    I've been using a Dynasty 700 on 220 single phase with a 50 Amp breaker and have pushed it up to 350 amps and not tripped the breaker.
    I have a larger breaker waiting, but I will only install it when the 50 trips.
    Nice thing is the duty cycle is 100% at 350 amps, or very close.

    Comment


    • #3
      I really don't have much input here.
      I really don't know how much difference there is between a 350 Dynasty and a 400 other than better software.
      400 amps is a lot for tig. Guessing you have really badass torches etc. on it
      I run my 700 on a 60 amp 3 phase breaker. I am using just a simple 14-30 plug.
      Like I said.....nothing relevant.

      www.facebook.com/outbackaluminumwelding
      Miller Dynasty 700...OH YEA BABY!!
      MM 350P...PULSE SPRAYIN' MONSTER
      Miller Dynasty 280 with AC independent expansion card
      Miller Dynasty 200 DX "Blue Lightning"

      Miller Bobcat 225 NT (what I began my present Biz with!)
      Miller 30-A Spoolgun
      Miller WC-115-A
      Miller Spectrum 300
      Miller 225 Thunderbolt (my first machine bought new 1980)
      Miller Digital Elite Titanium 9400

      Comment


      • #4
        Input specs are not a secret- all of that info was available before you purchased the machine.

        Minimum wiring specs:

        #8 wire
        70amp CB

        But even if you bumped up the wire and CB it will not change the machine's duty cycle on single phase.


        sheite- even going tp 3-phase your duty cycle is not that great. 20% at 400amps.
        Ed Conley
        http://www.screamingbroccoli.net/
        MM252
        MM211
        Passport Plus w/Spool Gun
        TA185
        Miller 125c Plasma 120v
        O/A set
        SO 2020 Bender
        You can call me Bacchus

        Comment


        • #5
          From the manual, it seems like it tops out at 300 amps when single phase and you only can get to 400 when 3 phase.

          60% duty 250 amps single phase.
          60% duty 300 amps 3 phase.

          The 400 in the part number is a bit misleading. Kinda sorta 400 amps and not for a very long time before it overheats.

          Comment


          • #6
            Originally posted by MasterKwan View Post
            From the manual, it seems like it tops out at 300 amps when single phase and you only can get to 400 when 3 phase.

            60% duty 250 amps single phase.
            60% duty 300 amps 3 phase.

            The 400 in the part number is a bit misleading. Kinda sorta 400 amps and not for a very long time before it overheats.
            It will do 400amps on single phase. Welding amp range on 1-3 Phase 3-400amps *
            * *Welding range for Stick process is 5-400 amperes. For TIG, the amperage range is tungsten diameter dependent (see Section 6-3)


            What you are looking at are the RATED specs.

            If you scroll down in the manual there is a Duty Cycle chart. which indicates 10% at 400 amps.

            300amps at 20% duty cycle. and cops to 10% for 400amps.


            Welding machines have been spec'd like this forever unless it is a 100% Duty cycle machine.




            Ed Conley
            http://www.screamingbroccoli.net/
            MM252
            MM211
            Passport Plus w/Spool Gun
            TA185
            Miller 125c Plasma 120v
            O/A set
            SO 2020 Bender
            You can call me Bacchus

            Comment


            • #7
              Thought better of it.
              Last edited by MasterKwan; 08-22-2018, 04:16 PM. Reason: Golden rule. Got nothing good to say, better to say nothing.

              Comment


              • #8
                Originally posted by MasterKwan View Post
                Thought better of it.
                Don't be such a tease
                Ed Conley
                http://www.screamingbroccoli.net/
                MM252
                MM211
                Passport Plus w/Spool Gun
                TA185
                Miller 125c Plasma 120v
                O/A set
                SO 2020 Bender
                You can call me Bacchus

                Comment


                • #9
                  Originally posted by Broccoli1 View Post
                  If you scroll down in the manual there is a Duty Cycle chart. which indicates 10% at 400 amps.

                  300amps at 20% duty cycle. and cops to 10% for 400amps.
                  Make mine a 330A/BP.
                  35% DC at 400A and about 25% at 465A.
                  No replacement for copper displacement!

                  Comment


                  • #10
                    Don't be such a tease
                    I made a disparaging comment about a 400 amp welder that only has 10% duty at 400 amps. Mine has 40% duty at max current (350 amps).

                    I just didn't want to step on anyone's toes.

                    Comment


                    • #11
                      Originally posted by Helios View Post

                      Make mine a 330A/BP.
                      35% DC at 400A and about 25% at 465A.
                      No replacement for copper displacement!
                      Great point. I actually thought about that machine and maybe a 500 Syncrowave as well.
                      I can see low duty cycles on the top end of machines that are meant to be portable. They have to cut weight at some point. But a shop only machine? other than footprint I see little advantage to a smaller package vs. more robust components. I consider my 700 a great 350 amp machine.
                      I have a big torch setup but always use a CK280FX and from time to time fry its guts out.
                      I believe the best shift in the right direction by Miller is going from the 200 to the 210. Much better duty cycle for about the same amps.
                      Miller doesn't have anything to build up the mid range Dynasties with. They would need a whole other platform.
                      One could play with helium mixes, although duty cycle would be a thing still.
                      Then there is also using DC and straight helium. I believe there is a couple of guys over on one of the forums (Hobart?) that have been tooting that horn for years.

                      www.facebook.com/outbackaluminumwelding
                      Miller Dynasty 700...OH YEA BABY!!
                      MM 350P...PULSE SPRAYIN' MONSTER
                      Miller Dynasty 280 with AC independent expansion card
                      Miller Dynasty 200 DX "Blue Lightning"

                      Miller Bobcat 225 NT (what I began my present Biz with!)
                      Miller 30-A Spoolgun
                      Miller WC-115-A
                      Miller Spectrum 300
                      Miller 225 Thunderbolt (my first machine bought new 1980)
                      Miller Digital Elite Titanium 9400

                      Comment


                      • #12
                        Originally posted by Portable Welder View Post
                        I just bought a Dynasty 400 and am not happy with the input spec from the manual... What is the amp draw 230 volt single phase when maxed out at 400 amps.
                        They show the amp draw under specifications as 47 amps when welding at 250 / volts 60% duty cycle, if I only needed 250 amps I would have gotten a 250 synchrowave......., but I need 400 amps, I'm killing my poor little 300 amp Dynasty welding 1" aluminum plate....., with preheat of course.

                        My guess is closer to 85 amps when maxed out at 400 amps with a 5% duty cycle.

                        I've been welding a lot of thicker aluminum lately so its easy to get close to maxing out the duty cycle.

                        The plug that I've been using is a 60 amp Russell & stoll plug.
                        when the dynasty 400 just came out i wrote to miller asking what size circuit breaker would be the ideal for this machine on a 230-240 volts single phase and they replied saying a 90amp breaker just the same as the normal operating fuse rate they recommend on the Electrical Service Guide page 30 to get 400 amp at 10% duty cycle.

                        Comment


                        • #13
                          Isn't anyone the least bit curious to ask, what the heck are you building out of 1 " thick aluminum? Because I'm curious? Curious George the monkey curious? With GTAW? I'm all ears and eyes?

                          Supply and demand. Getting past the point in conversation of how much heat is required to get past the conduction and convection of heat loss, your still left with requirements to bring a localized area up to a melting temperature and sustain it to add a drop of filler. Rome not being built in a day, maybe it rained 90% of the time who knows? I'd like to think that in that 10% that's left in the day you can still manage to get something done?

                          http://www.weldingtipsandtricks.com/...-aluminum.html

                          Well, that is all.

                          Comment


                          • #14
                            hey Noel.. Im with you on that one, very well said!

                            Comment


                            • #15
                              Originally posted by Noel View Post
                              Isn't anyone the least bit curious to ask, what the heck are you building out of 1 " thick aluminum? Because I'm curious? Curious George the monkey curious? With GTAW? I'm all ears and eyes?


                              When I was in the Sheet Metal Union a long time ago 1" thick aluminum welding in our shop was almost everyday. The pullers for the alum extrusion industry are made from 1" alum plate. I welded a pile of it with an old miller and spoolmatic gun. My buddy would hold a rosebud under the weldment while I welded the other side. Another guy up the road used 700 amp Tigs to do the welding...Bob
                              Bob Wright

                              Spool Gun conversion. How To Do It. Below.
                              http://www.millerwelds.com/resources...php?albumid=48

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