Dynasty 200 DX No outlet for Cooler?!?

[PhillipM]

We just picked up a Miller Dynasty 200 DX TIG at the SEMA show and have been very impressed with it. My only beef is that they do not provide a 115a plug on the welder for the coolmate to plug into like they do on the Syncrowave machines. I've got a real trip hazzard going in the shop with extension cords going all which ways to provide power for everything. Dang Miller, how hard would it have been? I mean really?

[parsonsj]

That would annoy me too. Actually my Lincoln 185 TIG machine has the same issue, and it annoys me every time I use it.

Anybody out there have a schematic about how to go about pulling power from the welder to make your own plug?

jp

[PhillipM]

At least I'm not the only one! Haha no one likes to complain alone.

[parsonsj]

Some research shows why this isn't so easy: most welder connections are 3 wire 220, so there isn't a separate neutral wire like in a 4 wire 220. That means that an internally wired 110 connection can only be a 2 wire (non-polarized) connection (hot and ground, no neutral), and most modern 110 devices aren't designed to work with non-polarized AC, due to safety reasons. Not to mention that you're pumping water... so there some significant safety / cost issues for providing 3 prong AC.

So... your choices are to rewire your welder for a 4 wire connection, use a somewhat dangerous non-polarized 110, or give up and plug your cooler into a separate wall socket.

Sigh.

jp

[PhillipM]

Yeah that part I knew... What I want to know now is how are the 115v plugs wired in on the Syncrowave Machine... Does anybody know?

[PhillipM]

Here is the wiring schematic for the Syncrowave, I'm just interested how they get the 115v safely on the front of the machine without having the nuetral circuit that is needed.

[The WidowMaker]

most welder connections are 3 wire 220, so there isn't a separate neutral wire like in a 4 wire 220. That means that an internally wired 110 connection can only be a 2 wire (non-polarized) connection (hot and ground, no neutral), and most modern 110 devices aren't designed to work with non-polarized AC, due to safety reasons.

my 220 is all wired with 2 hots and a neutral and no ground (per the inspector). so although you cant get a 3 prong connection with a hot/neutral/ground, you can still get polarized power with both the neutral and hot from the machine, or so i think. i know my thinking must be off, but where am i wrong?

Tim

[Roadbuster]

my 220 is all wired with 2 hots and a neutral and no ground (per the inspector). so although you cant get a 3 prong connection with a hot/neutral/ground, you can still get polarized power with both the neutral and hot from the machine, or so i think. i know my thinking must be off, but where am i wrong?

Tim

The 200DX is a 1/2/3 phase welder. I can run on anything from 120 single phase to 480 3 phase. The 200DX 3 phase is a delta configuration - no neutral. The 1 and 2 phase power configurations are derived from this.

3 phase power comes in 2 configurations delta and wye. The wye configuration has a neutral and needs 5 wires (3 hot, 1 neutral, and 1 ground).


The 200DX has 4 connections, Black, White, Red, and Green. Green is always ground.

For single phase power connect black to hot, white to neutral, green to ground.
For 2 phase power (ie 208V or 220V) Connect Black to phase 1 hot, white to phase 2 hot, and green to ground.
For 3 phase power connect black to phase 1 hot, white to phase 2 hot, red to phase 3 hot, and green to ground.

The 2 phase power is derived from the delta 3 phase so there is no neutral to get your 120 reference from.

The inverter based design gets rid of the massive transformer that would allow you to have a 120V tap. That is what makes the machine smaller and lighter.

I would have a box wired with a 4 conductor 220 (2 hots, neutral and ground) that uses a twist lock connector and a separate circuit 120 next to it and just run the two power cords next to each other.

If I could I would love 3 phase 480 power because it lowers the amps drawn and that is what the power company charges you for.

For portability I will hook up a 4 prong twistlock connector (NEMA L16-30) to the welder and then make and adapter plug to go to 120V or 220V.

Tim,
Curious about your connection without a ground. That would mean that your welding ground is the neutral line in your shop/house. That just does not sound good to me.

Jon

[The WidowMaker]

Curious about your connection without a ground. That would mean that your welding ground is the neutral line in your shop/house. That just does not sound good to me.


youre right, it does sound wierd. 220 was a new venture for me, but i consulted a couple electricians while running it. both said there was no difference because the neutrals are tied to ground in the main panel. ive been running my miller 210, IR compressor and Index mill like this for 4 years. if the consensus is that its wrong, its quick to change in my sub.

***edit***
ive been chasing links for hours trying to figure this all out. after consulting my manual, it looks like the miller wants two live wires and one ground as stated. but a welder creates an arc through a controlled short circuit, or so i thought. this would lead me to believe that in this configuration youre causing the ground wire to carry a load which it is only to do if theres trouble. is there another way that the ground cable is being grounded? if its carrying a load, then anything else on the same ciricuit thats wired with a ground for safety would have their cases charged.

what am i missing?

Tim

[David Pozzi]

Funny, I tried the Dynasty 200 at SEMA, but wanted the larger 350 amp version which has a 110v outlet on the back for a cooler. I couldn't justify the money for a new welder, but did find a used 300A Dynasty for a good price. It has the rear outlet.

Tim, The welder transformer output is two leads, neither one is ground. It's like a battery charger, the charger neg output terminal is not grounded.
David