Wiring a FP Transformer - 120/208 to 120/240

[rgoodwinelectric]

Any help on the wiring on this one? Wiring transformers is something I normally do not do and need some expert advice here.
Where are primary feed , secondary, and neutrals landed here? I have attached wiring diagram and pic of the actual transformer.

Thanks so much in advance!

 

[infinity]

H1 and H2-208 volt primary
X1 and X4-240 volt secondary with the X2-X3 junction being the common point or neutral.

 

[rgoodwinelectric]

Rob,

I have 3 phases on the primary and an H1 and H2 connection point. Where does the third cable come into play?

black to H1 / Red to H2 / Blue to ?

Thanks in advance

Also, does this need a GEC?

 

[rgoodwinelectric]

Also,

What size breaker am I using on the primary side?

 

[GoldDigger]

Rob,

I have 3 phases on the primary and an H1 and H2 connection point. Where does the third cable come into play?

black to H1 / Red to H2 / Blue to ?

Thanks in advance

Also, does this need a GEC?

You are only using two hot lines with the transformer connected line to line. This is s single phase transformer!

Also the jumper at the bottom connects two numbered tap terminals in the H windings for voltage adjustment.
I am surprised that there was not a table of tap voltages in the instructions.

 

[templdl]

Any help on the wiring on this one? Wiring transformers is something I normally do not do and need some expert advice here.
Where are primary feed , secondary, and neutrals landed here? I have attached wiring diagram and pic of the actual transformer.

Thanks so much in advance!

A picture is worth a thousand words. Please post a picture of the nameplate which includes the wiring diagram of the transformer. That way you can be assured that your question will be answered correctly.
You will note the number of responses you have received this far when only one would have been necessary.

 

[infinity]

Rob,

I have 3 phases on the primary and an H1 and H2 connection point. Where does the third cable come into play?

black to H1 / Red to H2 / Blue to ?


Also, does this need a GEC?

It's 1Ø so you only need two conductors at 208 volts. Yes on the GEC also you need a system bonding jumper.

A picture is worth a thousand words. Please post a picture of the nameplate which includes the wiring diagram of the transformer. That way you can be assured that your question will be answered correctly.
You will note the number of responses you have received this far when only one would have been necessary.

The wiring schematic is in the attachment in the OP.

 

[templdl]

It's 1Ø so you only need two conductors at 208 volts. Yes on the GEC also you need a system bonding jumper.



The wiring schematic is in the attachment in the OP.

Thanks, I completely missed thst.

 

[augie47]

50 kva 208 v primary 50000/208= 240 x 1.25 = 300 amp primary breaker.

 

[templdl]

It's 1Ø so you only need two conductors at 208 volts. Yes on the GEC also you need a system bonding jumper.



The wiring schematic is in the attachment in the OP.

The wiring schematic is in the attachment in the OP.[/QUOTE]

The only other thing that may confusing is applying the HV taps to adjust for a voltage higher or lower than 208. Reconnecting that jumper toward the lower portion of the coils is what I' m referring to in order to assure that you get as close to the 120/240 sec voltage as practical.
No pri voltages are illustrated in order to reconnect the taps that I can see.