dry type transformers

[mshields]

does anyone make dry type transformers which are more compact than the ordinary dry types available from GE, Shneider, etc?

 

[gar]

110418-1011 EDT

Fundamentally it is a temperature problem.

Use higher temperature wire and it could be slightly smaller. Use cooling of a standard transformer and it could be somewhat smaller. Use a low loss core with high temperature wire and it can be slightly smaller.

What is smaller worth? What is your application and power level?

Does this supply a rectifier and filter to produce DC? In this application a much smaller and lighter system can be obtained by converting to a high frequency.

.

 

[sameguy]

A watt is a watt is a watt.
What is your application?

 

[zog]

does anyone make dry type transformers which are more compact than the ordinary dry types available from GE, Shneider, etc?

I believe cast coils are more compact. What size you talking about?

 

[iwire]

does anyone make dry type transformers which are more compact than the ordinary dry types available from GE, Shneider, etc?

Look into GE 'Trans for mores'.

They are dry transformers with internal forced fan cooling and take up less space then a normal unit.

Of course the electrician may be swearing at you as they space to wire them is greatly reduced.

http://www.staticpower.com/pdf/DEA348_TransforMore_Flyer.pdf

 

[WastefulMiser]

does anyone make dry type transformers which are more compact than the ordinary dry types available from GE, Shneider, etc?

Depending upon your size, I have seen some tiny 30/45kVA epoxy encapsulated transformers from Hammond.

 

[steve66]

I think transformers have gotten larger and heavier since most states have adopted some form of the International Energy Code, or something similar.

There is a paragraph in there about transformers having to meet some standard for energy efficency.

 

[jim dungar]

I think transformers have gotten larger and heavier since most states have adopted some form of the International Energy Code, or something similar.

There is a paragraph in there about transformers having to meet some standard for energy efficency.

It is a federal law.
Public Law 109-58 of the Energy Policy Act of 2005 which went into effect in Jan 2007.

Transformers that meet these criteria are called TP-1 design, after the NEMA guidelines, are designed to be most efficient when based on a 24hr average loading of only 35%.

 

[steve66]

It is a federal law.
Public Law 109-58 of the Energy Policy Act of 2005 which went into effect in Jan 2007.

Transformers that meet these criteria are called TP-1 design, after the NEMA guidelines, are designed to be most efficient when based on a 24hr average loading of only 35%.

Thanks Jim, I couldn't remember for sure if it was TP-1, and I didn't bother to look it up.

I had forgot it was a federal law, and not the State Energy Codes (although I think they might restate the same requirement.)