 Welders Chime In Please!, Lincoln weld pak 100 shorts where wire enters gun! |
|
|
|
Porsche, and the Porsche crest are registered trademarks of Dr. Ing. h.c. F. Porsche AG.
This site is not affiliated with Porsche in any way. Its only purpose is to provide an online forum for car enthusiasts. All other trademarks are property of their respective owners. |
|
|
| Jeffs9146 |
 Feb 25 2011, 01:35 PM
Post
#1
|
|
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? |
   |
 
|
  |
Replies
| Jeffs9146 |
Feb 25 2011, 09:57 PM
Post
#2
|
|
Ski Bum Group: Members Posts: 4,062 Joined: 10-January 03 From: Discovery Bay, Ca Member No.: 128 |
Thanks Rick! I think we have eliminated a problem with the welder! Lennie tested it when he got home today and it works fine at his house!
It has to be a ground loop coming from the CoGen unit to the circut breaker ground panel!! Even if the breaker is turned off the ground is a constant and as kg6dxn said the neutral may also be looped in the system through the CoGen 120v generator! |
|
|
|
| Mike Bellis |
Feb 26 2011, 12:04 AM
Post
#3
|
|
Resident Electrician Group: Members Posts: 8,346 Joined: 22-June 09 From: Midlothian TX Member No.: 10,496 Region Association: None 
|
QUOTE(Jeffs9146 @ Feb 25 2011, 07:57 PM)  kg6dxn said the neutral may also be looped in the system through the CoGen 120v generator! Bonding the Neutral to the ground is an NEC (National Electrical Code) standard in the US. This is at the Main service panel at you home or buisness. They are also bonded at every transformer. It is possible they are bonded in the welder too. So, if the recepticle on the Co Gen is either: 1. Wired out of phase... or 2. "floating 120V" (60V +/- on each wire. Standard power in Operating rooms for example) it could F up the welder operation. I think Lennie should bring a long extension cord and fing another recepticle. BTW... Floating 120V is used in operating rooms so that the "hot" leg only searches for the neutral leg and NOT to earth ground. This is done so the patients that are being worked on are not electricuted if a power tool shorts out during surgery. |
|
|
|
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 kg6dxn Are you using a power recepticle from the Co Gen? ... Feb 25 2011, 08:47 PM Lennies914
Are you using a power recepticle from the Co Gen?... Feb 25 2011, 08:51 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 rick 918-S
Thanks Rick! I think we have eliminated a pro... Feb 25 2011, 10:00 PM 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 |
3 User(s) are reading this topic (3 Guests and 0 Anonymous Users)
0 Members:
|
Lo-Fi Version | Time is now: 27th December 2024 - 01:04 PM |
Invision Power Board
v9.1.4 © 2024 IPS, Inc.