Buck boost transformer

Status
Not open for further replies.
A

ADELECTRICWORKS

Member
Location
New York
Occupation
Electric al contractor
Hi,
I need little help. I am doing this first time.
I have a machine 3 phase 30 needs 3 x 230 v

I am getting L1-L2= 211 same for all three circuits
I need to make it 230v. Company send me two buck boost transformer 1.5kva single
It has same x1,x2,x3,x4. H1,h2,h3,h4
How should I connect these to make it 3 phase line to line 230
I am still on job site. Need to complete today.
they are opening it Monday. Can anyone send me detail diagram with input and output connections for both transformer?
thank you
 
Do you have 3 phase available ? (You only mentuion L1 & L2)
 
We can't answer without knowing the exact voltage ratings of the transformers you have, but the connection diagram will be _like_ BB from https://acmefaq.files.wordpress.com/2012/05/buckboostwiringdiagram.jpg

With two transformers you will derive 230V with the correct L-L voltage but unbalanced L-N voltage. For many applications this unbalance is not a problem.

The balance issue is why you are being asked about the neutral.

Jon
 
LarryFine said:
Okay, back to my question: Does your load need the neutral?
Click to expand...
No, it doesn’t need neutral.
I am getting same power 211 after connecting the transformer.
For both transformer h2-x1 with line, h1-h3 wire it together, x2-x3 wirenut together, h4 from both transformer and connect with line.
I am getting 211
I switch h2 with h1 I am getting 190
I need to make it 230
Loads are on x4s and h4
 
winnie said:
We can't answer without knowing the exact voltage ratings of the transformers you have, but the connection diagram will be _like_ BB from https://acmefaq.files.wordpress.com/2012/05/buckboostwiringdiagram.jpg

With two transformers you will derive 230V with the correct L-L voltage but unbalanced L-N voltage. For many applications this unbalance is not a problem.

The balance issue is why you are being asked about the neutral.

Jon
Click to expand...
And if neutral balance is needed, connection FF with three transformers will be used OR a closed delta with three transformers (not shown and rarely used)
 
Don't just guess. You need the voltages and connection diagram for the particular transformers you have.

I posted a link to a standard buck boost connection, but there are many variations on the theme. If you give us a part number someone here can point you to the exact connection. If you give coil voltages we can make a good guess.

For example if the transformer is a 120/240 to 16/32 then you want:
H4 (of both transformers) to L2, H2 to H3, H1 to X4 and L1 (or L3), X2 to X3, take output from X1 to L2. But with a different transformer that connection could burn things pretty quickly or give you something that seems to work but at reduced capacity.

Jon
 
ADELECTRICWORKS said:
Hi,
I need little help. I am doing this first time.
I have a machine 3 phase 30 needs 3 x 230 v
Click to expand...

ADELECTRICWORKS said:
I am still on job site. Need to complete today.
they are opening it Monday. Can anyone send me detail diagram with input and output connections for both transformer?
thank you
Click to expand...
It could be helpful if you could state your line and load voltages along with a picture of the transformer label.
Better luck tomorrow for Mondays opening. The instruction sheet should help.
 

Attachments

  • AcmeBuckBoostConnections.pdf
    1.5 MB · Views: 6
Status
Not open for further replies.
Top