Help Identify Transformer Vector Group
Help Identify Transformer Vector Group
(OP)
Good PM,
We are Planning to replace the old electro mechanical differential relay with numerical one. Problem is we cant identify the tranformer vector group because its name plate data was already lost.
Oher information taken from the previous test result is shown below:
1.5Mva
Delta-Wye
34.5/.480KV
50/5 -CT(HV)
2000/5 - CT(LV)
help or any TIP to identify the said vector group.........Tnx
We are Planning to replace the old electro mechanical differential relay with numerical one. Problem is we cant identify the tranformer vector group because its name plate data was already lost.
Oher information taken from the previous test result is shown below:
1.5Mva
Delta-Wye
34.5/.480KV
50/5 -CT(HV)
2000/5 - CT(LV)
help or any TIP to identify the said vector group.........Tnx






RE: Help Identify Transformer Vector Group
This has been the ANSI standard since the earth was still cooling. There can be exceptions, but they are rare.
We hayseeds here in the US don't know nuthin' 'bout no vector groups.
RE: Help Identify Transformer Vector Group
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Sometimes I wake up Grumpy.
Other times I just let her sleep!
RE: Help Identify Transformer Vector Group
A-b, A-c, B-a, B-b, B-c, C-a, C-b, C-c
Draw the D & y on top of each other both in the 11 & 1 o'clock positions (assuming its Dy11 or Dy1) not forgetting to tie A & a together and see which measured voltages fits the diagrams.
Its a while since ive carried out this procedure but it is standard vector varifacation.
RE: Help Identify Transformer Vector Group
then your transformer is standard US Dyn1 with the low voltage lagging the high voltage by 30 deg.
RE: Help Identify Transformer Vector Group