translate 480 to 415 v phase converter mystery

[s410man]

A mate has just bought 3 phase converters in a auction

Bit weird as they're like single phase to 3 phase but not 240 v

Any ideas on what they would be used for?

Anyway a pic speaks a thousand words so

 

[Maker]

I believe 480 volt single phase is a reasonably common (Read "not unheard of") supply?

A centre tapped transformer (240-0-240) would give 480v across the whole winding, could it be something to do with this?

 

[Sidewinder]

It's a single phase split phase, i.e. two 240V (now 230V nominal) phases 180 degrees apart supply, it is common in rural areas where there are only two 11kV lines rather than 3.
This would then be used to generate a true (hopefully) 3ph 3x240 (again now 230 nominal) supply giving a "real" 3ph 415 (now 400V nominal) supply for "normal" 3ph machinery.

The confusion comes from 2 phases of a 3 phase supply being described as single phase, which unfortunately is not uncommon and correct.
I personally don't like it though.
Also the relative phase angle between the phases would be 180 degrees to give you the 480V pk-pk as it were.
If it were 120 degrees you would not get the 480V.

BTW, IMHO Power Capacitors/Transwave is good kit.

 

[normspanners]

From what I can see the transwave one is 240v input on data plate

 

[HughF]

exactly as mentioned above, this is a 2 phase to 3 phase converter...

The transwave one is a regular phase-neutral input converter

 

[s410man]

ohh i kind of get it now

seen split phase on farm milking machines etc and weve got it on a hydroelectric system cos of being quite a way from 3 phase

any ideas as to value as he bought them in a job lot and doesnt need them

cheers

 

[Sidewinder]

s410man,

Could you please PM me with your location and some more information.
Perhaps we can then discuss this by PM/email, I, might, have a customer for the 480/400 version.
MIGHT, I hasten to add, and it depends on the spec/£ on that & the others.

 

[normspanners]

Also if the transwave 240v one is available I might be interested too.