[greg2560]

Got a airco 2a/ddr-224hpa/b-d. I have a question on the rating of this machine. On the selector it has 120 to 300 that is max position. I the spec of the secondary transformer is only rated at 200 amps. Then it has some text on there saying (welding range inert gas 5-300) So is this a 200 amp stick and 300 amp tig ? I is an old stand up orange airco . Pretty big unit.

[MinnesotaDave]

If this is the tag you are talking about, it's showing you that at 200 amps the duty cycle is 60%.
It's still a 300 amp welder.

I have the larger model (looks the same) at 300 amps, 60% duty cycle and 470 amps max.

dis5233-airco-model-2a-ddr-224-hpa-ac-dc-heliwelder-parts-or-repairw-cooler-3.jpg (35.54 KiB) Viewed 852 times

[greg2560]

Yup that is it. how can it be a 300 with a 200 amp secondary. Got to have it high range about 75 on dial to burn a 1/8 7018. And it is set for 220v input

[MinnesotaDave]

The secondary isn't limited to 200 amps. They are just listing the duty cycle at 200 amps for you.

As you increase amps over 200, the duty cycle will decrease as you go.

[greg2560]

thanks for the info Dave !!!! Makes sense..