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| Jeffs9146 |
 Feb 25 2011, 01:35 PM
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#1
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Ski Bum  Group: Members Posts: 4,062 Joined: 10-January 03 From: Discovery Bay, Ca Member No.: 128  |
Lennies914 is in the field welding on a large CoGeneration system and is having problems with the welder. The system is built into a building and wired into the electrical system. The welder is pluged into the wall and the CoGen unit is shut off.
When the welder ground is attached to the CoGen unit and he attempt to weld the wire heats up inside the feeder and the wire melts and balls up! If he disconnects the ground the wire feeds fine. I used this welder a week ago and it worked great at my house! The question is: What would cause this? Would the fact that the CoGen system is grounded to the same plug that the welder is pluged into cause a problem? If a battery is hooked to the CoGen system would that cause this problem? OR Is there anything else that may cause this problem? |
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| Mike Bellis |
Feb 25 2011, 08:47 PM
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Resident Electrician Group: Members Posts: 8,346 Joined: 22-June 09 From: Midlothian TX Member No.: 10,496 Region Association: None 
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Are you using a power recepticle from the Co Gen? The groung of the AC power is bonded to the chassis ground on most Gens. Perhaps the ground loop. Is your unit a 120V system? If so, the ground and neutral on the recepticle should also be bonded at the source, adding to the ground loop problem.
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| Lennies914 |
Feb 25 2011, 08:51 PM
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#3
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Slacker Group: Members Posts: 828 Joined: 9-January 10 From: NorCal Member No.: 11,216 Region Association: Northern California |
QUOTE(kg6dxn @ Feb 25 2011, 06:47 PM)  Are you using a power recepticle from the Co Gen? The groung of the AC power is bonded to the chassis ground on most Gens. Perhaps the ground loop. I was hoping you'd chime in Mike. I was using a wall recep. Although the cogen does supply power to the building it has to be running and the contactor closed. (IMG:style_emoticons/default/confused24.gif) |
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Posts in this topic
Jeffs9146 Welders Chime In Please! Feb 25 2011, 01:35 PM
underthetire Probably ground looping. Lennie has my number Feb 25 2011, 01:45 PM Jeffs9146 Thats what I told him it could be! I am just l... Feb 25 2011, 01:46 PM stugray The inside of a wire feeder is isolated from the o... Feb 25 2011, 03:23 PM toon1 There are + and - wires inside the flip up door th... Feb 25 2011, 07:27 PM
Lennies914
There are + and - wires inside the flip up door t... Feb 25 2011, 08:25 PM Lennies914 Thanks Guys,
I just got home and tried my welder.... Feb 25 2011, 08:10 PM rick 918-S Is the welder sitting on the Co Gen unit? There ma... Feb 25 2011, 08:32 PM Jeffs9146 The welder is sitting on a cart that is on rubber ... Feb 25 2011, 08:43 PM Lennies914
The welder is sitting on a cart that is on rubber... Feb 25 2011, 08:47 PM Jeffs9146
That was my first explanation when Lennie called... Feb 25 2011, 09:12 PM rick 918-S Check the liner. The liner could be contacting a g... Feb 25 2011, 09:43 PM Jeffs9146 Thanks Rick! I think we have eliminated a prob... Feb 25 2011, 09:57 PM rick 918-S
Thanks Rick! I think we have eliminated a pro... Feb 25 2011, 10:00 PM kg6dxn
kg6dxn said the neutral may also be looped in th... Feb 26 2011, 12:04 AM Racer Chris I didn't read all the answers above, but my fi... Feb 26 2011, 03:12 AM toon1
There are + and - wires inside the flip up door ... Feb 26 2011, 10:38 AM |
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