# Urgent transformer paralleling problem

#### Sraj123!

Joined Jul 11, 2023
4
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
with thanks

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#### crutschow

Joined Mar 14, 2008
33,348
So what do you think is a problem?

#### Sraj123!

Joined Jul 11, 2023
4

#### crutschow

Joined Mar 14, 2008
33,348
I don't see any problem mentioned in your posts, so how am I supposed to know what problem you are concerned about?

#### schmitt trigger

Joined Jul 12, 2010
772
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.

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#### Papabravo

Joined Feb 24, 2006
20,600
It must the fault of the education system if the TS cannot express himself clearly.

#### DickCappels

Joined Aug 21, 2008
10,104
What are the symptoms that make you worry? Which voltages do you suspect is wrong?

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#### tautech

Joined Oct 8, 2019
372
If paralleling transformers I suspect the OP has a phasing issue.

#### Sraj123!

Joined Jul 11, 2023
4
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.

#### LowQCab

Joined Nov 6, 2012
3,580
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.
.
.
.

#### Sraj123!

Joined Jul 11, 2023
4
i have attached the nameplate details

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#### tautech

Joined Oct 8, 2019
372