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Using Aluminum Windinsg in Outdoor Distribution Transformer

Using Aluminum Windinsg in Outdoor Distribution Transformer

Using Aluminum Windinsg in Outdoor Distribution Transformer

(OP)
We received a bid to install aluminum windings on a 11kV primary - 480 secndary 2MVA transformer installed outdoors. Winter weather can be harsh - down to -20F.

I am assuming the cold weather won't be a problem because the windings will be heated thorugh it's own losses and warm the insulating oil. Is that a correct assumption?

Thanks.
c

RE: Using Aluminum Windinsg in Outdoor Distribution Transformer

I'm not aware that aluminum windings have any particular limitation regarding cold weather.  Efficiency is the main concern.  Most step-type voltage regulators used on distribution feeders have aluminum windings, at least in my experience.  

RE: Using Aluminum Windinsg in Outdoor Distribution Transformer

Pole mounted transformers in Quebec, Canada have aluminum windings and are designed to operate at such a cold temperature.I suspect the same for pads.

 

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