Pages: [1]   Go Down

AuthorTopic: welders, generators, kva and that?  (Read 638 times)

0 Members and 1 Guest are viewing this topic.

Offline lambert

  • Moderator
  • ***
  • Posts: 2137
  • Attack: 100
    Defense: 100
    Attack Member
  • Karma: +1/-0
  • and then as if by magic
    • harrogate
  • Referrals: 0
welders, generators, kva and that?
« on: May 10, 2010, 21:22:47 »
hi i'm looking at a new genny for my arc welder. problem is the welder gives power as amps at between 14 odd and 24 odd volts not 240 so how does one determin the draw for one in terms of the other? a convertor of kva's into ?welder units? would be good if anysuch exists.

cheers in advance.
Logged
Lambert Coverdale.

As slow as possible, as fast as necessary.

Two and a half litres of turbocharged diesel goodness.

Offline Range Rover Blues

  • Moderator
  • ***
  • Posts: 15218
  • Attack: 100
    Defense: 100
    Attack Member
  • Karma: +3/-0
    • South Yorkshire
  • Referrals: 0
Re: welders, generators, kva and that?
« Reply #1 on: May 10, 2010, 21:59:33 »
If I've got this right KVA is kilo-volt-amps.  Volt-amps is sort of like watts except that with AC the current can be behind (or AHEAD) of the voltage.
Logged
Blue,  1988  Range Rover 3.5 EFi with plenty of toys bolted on
Chuggaboom, 1995 Range Rover Classic
1995 Range Rover Classic Vogue LSE with 5 big sticks of Blackpool rock under the bonnet.

Offline Smego

  • Posts: 268
  • Attack: 100
    Defense: 100
    Attack Member
  • Karma: +0/-0
  • Referrals: 0
Re: welders, generators, kva and that?
« Reply #2 on: May 17, 2010, 17:00:45 »
Almost if the load is an inductive load it can draw slightly more power as the AC wave can be out of phase.
Logged
Nissan Patrol GR LWB and a 3rd Gen Surf for fun...

Offline Smego

  • Posts: 268
  • Attack: 100
    Defense: 100
    Attack Member
  • Karma: +0/-0
  • Referrals: 0
Re: welders, generators, kva and that?
« Reply #3 on: May 17, 2010, 17:01:34 »
PS on the welder rating plate you should find it's draw for the AC side.
Logged
Nissan Patrol GR LWB and a 3rd Gen Surf for fun...

Offline lambert

  • Moderator
  • ***
  • Posts: 2137
  • Attack: 100
    Defense: 100
    Attack Member
  • Karma: +1/-0
  • and then as if by magic
    • harrogate
  • Referrals: 0
Re: welders, generators, kva and that?
« Reply #4 on: May 17, 2010, 18:54:14 »
neither my mig set nor my arc give max ac draw which would be easy, however using maths(blurgh) it seems that under max load the mig is ~1900w and the arc ~3900w so will have to see where that gets me.

cheers all.
Logged
Lambert Coverdale.

As slow as possible, as fast as necessary.

Two and a half litres of turbocharged diesel goodness.
Pages: [1]   Go Up
 





SimplePortal 2.3.5 © 2008-2012, SimplePortal