Convert Hobart Handler 135 to 175

- G
- Greg
  
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posted
19 years ago

Fri, Aug 29, 2003 7:23 PM

I just picked up a Hobart 135 and noticed on the schematics that they
look like the same welders with different line voltages. Does anyone
know if you change the input from 120VAC to 220VAC on the 135 will it
be converted to a 175??
Technically if the circuit board can sense the voltage is would work.
Greg

- D
- Dan
  
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posted
19 years ago

Sat, Aug 30, 2003 7:51 AM

Greg
Take a look at the parts list in your owners manual. The machines have several components in them that are different. The most important component right off the top that is different is the transformer. The input and output power on the HH 135 is much lower then on the HH 175. So, the manufacturer can cut cost on the HH 135 by using a smaller transformer. More then likely, if you try to run your 120 volt HH 135 on a 230 volt power source all you will end up with is a very expensive boat anchor after you have totally fried the machine.

- L
- Leo Lichtman
  
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posted
19 years ago

Sat, Aug 30, 2003 8:04 AM

Dan wrote: (clip) the manufacturer can cut cost on the HH 135 by using a smaller transformer(clip) ^^^^^^^^^^^^^ Not only would it be a smaller transformer, but undoubtedly would have a different turn ratio. Welding at higher current, as the 175 does, does not require double the arc voltage, so what you need is more step-down, along with heavier wire in the secondary.

- C
- cope
  
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posted
19 years ago

Sat, Aug 30, 2003 12:17 PM

Greg, I suspect that the transformer is different. You can post this at Hobart's site and see what the Hobart/Miller guts say.

formatting link

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- Desert Traveler
  
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posted
19 years ago

Sat, Aug 30, 2003 2:42 PM

Hell, hook it up and try it. What's the worst that could happen?
Is your insurance current? oooooooooo bad pun ..........
Steve

- G
- Gary Coffman
  
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posted
19 years ago

Sat, Aug 30, 2003 5:25 PM

No, you can't. If you look in the parts list, you'll find that different transformers, reactors, rectifiers, gas valves, fans, and control cards are required for the 230 volt 175 amp model. The *designs* are basically the same, but the parts are not.
Gary

- G
- Gary Coffman
  
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posted
19 years ago

Sat, Aug 30, 2003 6:39 PM

No, you can't. If you look in the parts list, you'll find that different transformers, reactors, rectifiers, gas valves, fans, and control cards are required for the 230 volt 175 amp model. The *designs* are basically the same, but the parts are not.
Gary

- E
- Eastburn
  
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posted
19 years ago

Mon, Sep 1, 2003 3:42 AM

Reactors - comes from Reactance - based on XL from Inductance and XC from Capacitance. X = |XL-XC| is the reactance of the circuit at any one time. Based on frequency.
XL = 2*pi*F*L (Hertz*Henry)
XC = 1/2*pi*F*C
Anytime there is a reflection of impedance there is a reflection of voltage and current.
Therefore, current is always somewhere between pure resistance and the resultant X value.
[ Gas Valves - didn't know they had tubes - oh - Gary is in "bell south country" so they are mechanical, not electronic (as in the U.K. :-) ]
Martin