Substation Lose Question

[Johnny Johnson]

I am trying to determine if the cost of operating a 5000 KVA 13.2/2400 substation at about 40% load is costing extra money from xformer lose. In my case it would be simple to move the feeder breaker and cables to the sub beside it and shut one down. This would result in one sub loaded at about 90 % rather than two at 40% each. I have read that subs operating at low loads cost extra money in the form of VARS.

thanks for any help..