110V single phase to 110V-N-110V split phase 220V

silverse2m6

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Jun 16, 2017
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I've been looking for a step up transformer with primary 110V and center tapped 220V secondaries. Could anyone recommend me of such a transformer? I'll be using it with the 4 PIPs (2424LV-MSD) which will be operating in parallel, so 8kVA to 12kVA models preferably.
Thanks in advance
 
Probably the only way you're going to get that is by making it yourself. At least, at a reasonably price. It's not hard to make the transformer. Just takes time to put it all together.

Plenty of MOTs you can get from ppl throwing out microwaves.
 
have a used 3phase 75kva transformer that would do that.

i would do a search for

buck boost 8kva

they are way cheaper than transformers.

i find mine at used industrial places in phoenix.

apache reclamation
aaa breaker company

and on craigslist


Ok i have to ask, your in usa,
why do you want 240 volts?
our electric here is 120v or 120v x2
searching that inverter says its 120v.
 
1958 greyhound said:
have a used 3phase 75kva transformer that would do that.

i would do a search for

buck boost 8kva

they are way cheaper than transformers.

i find mine at used industrial places in phoenix.

apache reclamation
aaa breaker company

and on craigslist


Ok i have to ask, your in usa,
why do you want 240 volts?
our electric here is 120v or 120v x2
searching that inverter says its 120v.

I like your recommendation. 3 phase would work as well since 3 x PIP2424LV can generate 3 phase voltage.

On why wanting 220V. And as you already alluded to, in the US, our larger appliances (air condition, dryers, ovens, well pumps...) use 220V but the way 220v is delivered is between 2 opposite 120V mains, hence the reason I'm asking for a 120-N-120 (center tapped) transformer.

Are you using the 3 phase transforner? What brand/model is it?
 
Hmm this tread is relevant to my interests. I've been searching for some way to get 220v out of my 110v mppsolar inverter.
 
AZ_Tekkie said:
Hmm this tread is relevant to my interests. I've been searching for some way to get 220v out of my 110v mppsolar inverter.
Peggy from MPP Solar just replied to my question about phasing out 2 PIP that are in parallel. I thought it would be possible by firmware upgrade since they have 0' and 120' synchronization capabilities (parallel and 3phase). Unfortunately they don't seem interested in offering the 180' capability:

"sorry, it's not possible.
LV is designed in single phase 110-120vac only
Peggy"
 
sorry to hear that.

ok back to learing about transformers.
3 phase just has three coils inside, its posible to just use two of them for single phase.

every center tap transformer i know of takes the high voltage and makes half.

I might be missing something, but it sounds like you have two legs of 110v and want to run a stove or ac, the only way i know is a 220v inverter that is pure sine wave.
 
That looks nice. Did you get price quote yet?

What's good about the transformers is if you need to bump the amps up, you just run multiples in parallel (if it really becomes cost prohibitive to just to have a large one made)
 
Korishan said:
That looks nice. Did you get price quote yet?

What's good about the transformers is if you need to bump the amps up, you just run multiples in parallel (if it really becomes cost prohibitive to just to have a large one made)
Should be getting one today. I will share with the group. Tech I talked to said it weights about 200# (90kg) !?!
 
The transformers for that amount of powers are heavy yes. Especially since they are air-coled :)
 
O now I see what your doing.
Your feeding 120v and getting out 120 n 120 just like the power company would supply you.

Yes its going to have a crap ton of copper in it to stay cool. My 75 kva take a 2 ton cherry picker to move it.

How much was it ?
 
1958greyhound said:
O now I see what your doing.
Your feeding 120v and getting out 120 n 120 just like the power company would supply you.

Yes its going to have a crap ton of copper in it to stay cool. My 75 kva take a 2 ton cherry picker to move it.

How much was it ?

Just got the quote, didnt purchase it (yet) b/c very pricey: Here is what I received.

Our P/N 19247 1 each $ 1095 each

See link below for details.

http://www.lcmagnetics.com/transformers/single-phase-isolation-transformers/single-phase-isolation-transformer-10-kva-pn-19247/

Lead time is 2 to 3 weeks ARO, FOB Anaheim.

Freight cost to South Carolina is estimated at $ 150.00. You will pick up from the fright terminal.
 
mike said:
Korishan said:
What's good about the transformers is if you need to bump the amps up, you just run multiples in parallel (if it really becomes cost prohibitive to just to have a large one made)

That doesn't mess with the sine waves at all?

As long as the transformers are wound the same number of turns it won't effect the sine waves. And actually, it's really the primary winding that has to be the same. The secondary could be different so you could get different voltage outputs. If you look at the web site, they actually have some transformers that are in pairs and linked together to get different voltages and such. I know there's more to it than that, but that's basically it.
 
silverse2m6 said:
1958greyhound said:
O now I see what your doing.
Your feeding 120v and getting out 120 n 120 just like the power company would supply you.

Yes its going to have a crap ton of copper in it to stay cool. My 75 kva take a 2 ton cherry picker to move it.

How much was it ?

Just got the quote, didnt purchase it (yet) b/c very pricey: Here is what I received.

Our P/N 19247 1 each $ 1095 each

See link below for details.

http://www.lcmagnetics.com/transformers/single-phase-isolation-transformers/single-phase-isolation-transformer-10-kva-pn-19247/

Lead time is 2 to 3 weeks ARO, FOB Anaheim.

Freight cost to South Carolina is estimated at $ 150.00. You will pick up from the fright terminal.

at that price does it include an enclosure or just the bare transformer like on their site? That's quite a bit more expensive than i was expecting. I was guessing in the 4-500 dollar range.


So i didn't even know this until now, you can get 3 phase by running the pip inverters in parallel, why can't that work to supply 240 to the appliances that need it? Is it just because splitting it into 3 phases spreads the capacity out too far and won't run your particular appliances unless you gang them all up to a single phase?
 
AZ_Tekkie said:
silverse2m6 said:
1958greyhound said:
O now I see what your doing.
Your feeding 120v and getting out 120 n 120 just like the power company would supply you.

Yes its going to have a crap ton of copper in it to stay cool. My 75 kva take a 2 ton cherry picker to move it.

How much was it ?

Just got the quote, didnt purchase it (yet) b/c very pricey: Here is what I received.

Our P/N 19247 1 each $ 1095 each

See link below for details.

http://www.lcmagnetics.com/transformers/single-phase-isolation-transformers/single-phase-isolation-transformer-10-kva-pn-19247/

Lead time is 2 to 3 weeks ARO, FOB Anaheim.

Freight cost to South Carolina is estimated at $ 150.00. You will pick up from the fright terminal.

at that price does it include an enclosure or just the bare transformer like on their site? That's quite a bit more expensive than i was expecting. I was guessing in the 4-500 dollar range.


So i didn't even know this until now, you can get 3 phase by running the pip inverters in parallel, why can't that work to supply 240 to the appliances that need it? Is it just because splitting it into 3 phases spreads the capacity out too far and won't run your particular appliances unless you gang them all up to a single phase?

I didn't ask but I'm pretty sure it's w/o enclosure. Too pricey imho. Maybe a group buy would get us a better price?

_____________

When I asked MPP solar what voltage do 3 PIPs like mine in parallel produce in 3 phase configuration I was told 400V.

They had to be quoting me a 230V model because 400V=230xSqrt(3).

I'm pretty sure the US models provide 208V=120xSqrt(3). Some 240V devices can work with 208 but generally not too good for longevity of the device.

I'm pretty sure another center tap transformer would be needed again because I need 110-0-110 split phase.
 
Why would you need 110 - 0 - 110 transformer as well? House voltage is 115 - 120V with 120V being closer to what's really coming out of the wall. I know some devices will say 110V, but plugs directly into house mains of 120V without issues.
 
after realizing that these things can do 3 phase, i'm considering picking up two more for 3 phase. I don't have much experience on 3 phase, but you should be able to run phase 1 and 2 into a normal breaker panel and phase 3 into another panel and run your 240 stuff on phase1/2. Either that or i'll find a 3phase panel to install.
 
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