Transformer rating

[aishu]

What is the maximum rating (MVA) of power transformer that can be used in Transformer rating. Presently we use 50/67 MVA 110, 115 and 132kV primary and 13.8kV secondary z=22% assuming we take of transmission line or cable for the revised power rating.
Thanks

 

[prc]

Maximum Transformer size is decided based on peak demand load and breaking capacity of breakers.

 

[aishu]

I am interested in the data and not how to calculate etc.

 

[prc]

Transformer manufacturer can make any rating. The range of 132 kV class transformers that I handled is 5 MVA to 570 MVA 3 phase 50 HZ units. If your situation allows, you can use any rating.

 

[jraef]

Transformer size is limited only by the size of your budget (and ability to pay).


" We are all here on earth to help others; what on earth the others are here for I don't know." -- W. H. Auden

 

[waross]

Another limit on transformer size is the ability to transport the transformer to the final location.
For the very largest transformers there have been temporary rail lines built to project sites in order to deliver the transformer by rail.

Bill
--------------------
"Why not the best?"
Jimmy Carter

 

[davidbeach]

That’s one reason for very large transformers to be a bank of three single-phase transformers rather than a single three-phase unit.

 

[7anoter4]

Power transformer up to 100 MVA it is usual range.
See for instance:

https://www.siemens.com/content/dam...ering-guide-transformers-product-brochure.pdf

The short-circuit impedance minimum could be as per IEC or ANSI standard.
If you need a special one you have to ask a potential manufacturer how does it cost and other.
Step-up transformer of 110/14 kV up to 130 MVA I saw it 40-50 years ago.160/22 kV up to 300 MVA and 20-24% short-circuit impedance for power station was usually 20-30 years ago.
You have to contact the manufacturer and to fill an official request form.