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I just received my new ( to me ) TD Cutmaster 38, and it works great. I'm running it on a 20amp 120v circuit right now, since that's the stock plug on the unit, but it will auto-sense 208 and 240v as well. I have a 30 amp 240v circuit available for it, but from reading the manual, it appears that there's no real performance benefit to running on 240v. There's no mention of different ratings, or capacities, or cutting speeds, for 120 versus 240. And there's a chart showing the power input on each voltage, and it's actually highest on 120. (?) Specifically, it says the power input is 3.6 kVA on 120 volts, 3.5 kVA on 208, and 3.4 kVA on 230. Is there no benefit to switching it to 240v? Then again, I've read that it has a feature called... "Power Factor Correction CUTMASTER 38 has Power Factor Correction, an innovative input power feature that maximizes cutting output for any input voltage for smoother, more dependable output when operating on low input power line or welding generator auxiliary power." I would just try it, but I have to make a pigtail to do so, and if I don't need said pigtail, I was going to return the pieces. Thanks.__David Hillman
Reply:The advantage to running on a 230 circuit is that there is more power available to you than on 120 VAC. The CM 38 can draw more power on 120 than the circuit has in it, depending on the specific circuit. At full output the CM 38 can draw 29 amps on a 120 circuit. If you have a 20 amp breaker on that circuit, it will heat up and pop the breaker. At 230 VAC, you are drawing 14 amps and almost all 230 V circuits are fused for 20 amps or more.There is little difference in the output or cut capacity on 120 or 230. On my CM 38, I can cut at full output on my 20 amp 120 circuit for a short cut, but it will pop the breaker when I try longer cuts.You can also turn the output down to reduce the power draw. Direct relationship between power in and power out. 20 amps output will do the job on 1/4 inch, really slow on anything thicker. |
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发表于 2021-8-31 22:26:59