Good Morning,
Before paralleling 2 dyn11 individually loaded transformers i got the following measurements;
A-A = 250V
B-B = 250V
C-C = 250V
A-B = 465v
B-A = 465 v
C-A = 465 v
would you please advise what would be the problem
with thanks

 

would you please advise what would be the problem

So what do you think is a problem?

 

So what do you think is a problem?

not sure

 

not sure

I don't see any problem mentioned in your posts, so how am I supposed to know what problem you are concerned about?

 

The voltage relationship between phase to neutral and phase to phase. The sqrt(3) ratio is not being met.
Assuming that this is actually a three phase transformer, which I don’t know because THE PROBLEM IS that you haven’t told us.

 

It must the fault of the education system if the TS cannot express himself clearly.

 

What are the symptoms that make you worry? Which voltages do you suspect is wrong?

 

If paralleling transformers I suspect the OP has a phasing issue.

 

I don't see any problem mentioned in your posts, so how am I supposed to know what problem you are concerned about?

When i do phasing checks phase A to phase A should be close to 0, however i am getting 250V, and phase A to phase B should
be 415V, but in this case i am getting 465V.
That is why i posted this to get some solutions as to why i am getting these results. Is it because the neutrals of one of the transformers is causing this problem or can it be something else.

 

The most likely problem is your measuring technique, or,
You are guessing at a Transformer for which You have no Specifications.

Please provide a picture of any specifications printed on the Transformer,
or better yet, provide the manufacturers Specification-Sheet.
.
.
.

 

i have attached the nameplate details

 

would you please advise what would be the problem

Let me say this again now you have provide images: Phasing is your problem
Swapping any 2 primary feeds should fix it.