Thread: 2 phase 240 volts?

Originally Posted by Ivan in Oz

2 Phases, 180* between both 2 phases ................Specialised
480V Ph to Ph,
240V Phase to Neutral

Rural power, a lot of the dairies up here use it.

Originally Posted by Ivan in Oz

....When I grew up......Here we go
....32 Volt single phase,
this was a single Phase Lister Getset, ....

We had 32VDC til the late '60s, single cylinder Lister diesel aircooled, more of a Knack, Knack, Knack, sound than the Dug, Dug, Dug that the watercooled ones made. (My grandfather had one of the watercooled ones)
We had a bank of 16 2V lead acid batteries that were bigger than a modern car battery.

Please refer to my explaination in this thread!

http://www.woodworkforums.ubeaut.com...highlight=480v

The 2phase bit has me worried though, as these welders when run on 415v still only access a single phase!

Originally Posted by Ashore

was this the standard al , cause I thought the standard for 2 phase domestic in Australia was /is 415v
Guess there is a double standard in the welding trade too .

Pity you didnt do the research.

http://en.wikipedia.org/wiki/Two_phase

Somewhat off topic (OK totally) but I will be needing a 380 volt 50Hz power supply for an oven I am bringing in to the country from Germany .... anyone got a step-up trannie laying around that will do that for me? Seriously, I think I will need a trannie that can output 10 amps at 380, so any help would be appreciated.

Thanks

Originally Posted by Brickie

Pity you didnt do the research.

http://en.wikipedia.org/wiki/Two_phase

I don't understand your reference to my not doing my research and then giving a link to an intresting site on 19th century power supply, what has 1895 DC generators fitted at Niagara Falls have to do with welding , they did supply 2 phase power as did a lot of generation systems of the era in fact DC generators were built by edison to power whole cities but were quickly superceeded by 3 phase AC and 2 phase power is not to my knowledge produced comercially anywear

Originally Posted by seriph1

Somewhat off topic (OK totally) but I will be needing a 380 volt 50Hz power supply for an oven I am bringing in to the country from Germany .... anyone got a step-up trannie laying around that will do that for me? Seriously, I think I will need a trannie that can output 10 amps at 380, so any help would be appreciated.

If you think you can get away with 350V (or 360V), it would be easiest to use an off-the-shelf 240V to 110V (or 120V) transformer with the 110V winding wired in series (and correctly phased) with the 240V. This will give 240V + 110V = 350V. (incorrectly phased you will get 240V - 110V = 130V).

It would be easier enough to get another transformer and also wire it in series to make up the extra 30V if required.

The only issue is to watch is the primary to secondary insulation rating of the transformer(s).

Very interesting thanks ..... can't wait to get this oven and see what happens!

Originally Posted by seriph1

Somewhat off topic (OK totally) but I will be needing a 380 volt 50Hz power supply for an oven I am bringing in to the country from Germany .... anyone got a step-up trannie laying around that will do that for me? Seriously, I think I will need a trannie that can output 10 amps at 380, so any help would be appreciated.

Thanks

I would look at the Tranny's used in Valve power amps. I'm betting you'd find a 380V one - not sure about current rating though

peter

Originally Posted by petersemple

I would look at the Tranny's used in Valve power amps. I'm betting you'd find a 380V one - not sure about current rating though

peter

Yep, somehow I think a valve radio tranny won't power an oven. I'm guessing it will have to be a kick ass size to power an oven.

Possibly the OP will be able to power this on two or three phase depending on a lot of factors, including if it has electronics. Might need to get a sparky to eye ball the installation manual.

When I lived in the States (Boston) we had a four-wired electrical system, rather than the Australian three wire system. The wires were active, counterphase, return and earth. By connecting between either the active or counterphase and the return wire one got 110 volts AC single-phase. By connecting to between the active and counterphase you got 220 volts two-phase.

It seeems like you may have an American-standard welder. This may or may not comply with Australian standards. This raises all sorts of legal liability and insurance issues.

It may be prudent to check with your state electrical regulator before trying to use it.

Cheers

Originally Posted by Uncle Bob

Yep, somehow I think a valve radio tranny won't power an oven. I'm guessing it will have to be a kick ass size to power an oven.

Re the oven thing - I have in my online travels recently seen a few australian people selling 415v - 380v 3 phase step down transformersfor operating 380v equipment on Aussie 3 phase. Are you sure the oven is supposed to be single phase?

peter

Originally Posted by GraemeCook

When I lived in the States (Boston) we had a four-wired electrical system, rather than the Australian three wire system. The wires were active, counterphase, return and earth. By connecting between either the active or counterphase and the return wire one got 110 volts AC single-phase. By connecting to between the active and counterphase you got 220 volts two-phase.

It seeems like you may have an American-standard welder. This may or may not comply with Australian standards. This raises all sorts of legal liability and insurance issues.

It may be prudent to check with your state electrical regulator before trying to use it.

Cheers

I have worked in plenty of welding shops that have 480V 2 Faced welders, they may be the older type, but they still worked ok.

The oven has nothing in it that I can imagine would use 3 phase, so I can't see why it would need it.... I can't find the bloody pics the seller took for me, but I am sure it has the single phase symbol after the 380.... that being a 1, then a circle with a line through it........ but hey I have been magnificently wrong before!

http://users.pandora.be/worldstandards/electricity.htm.
Check out this site. The nerds guide to worldwide power.
It says that the yanks use 240v 2 phase.
The question that needs to be asked is where did you get this welder?