Can you parallel two 45KVA transformers to get 90KVA?
If not what code article?
Adding to ron's post:I don't think the code prohibits it directly, but if you are not careful, you might consider that you are not going to be able to protect the conductors to the individual transformers at their respective ratings...
yes must have same impeadance and winding ratios. Be careful to read about how to do it correctly. You have to connect the primary and then one secondary at a time, measuring for voltage before making the connection each time. Did it once on an office expansion about 20 years ago.
Is it easy to guarantee that a new transformer has the same impedance as an existing transformer? I thought that this is a value that the manufacturer builds within a certain specified range. It will be near a certain value, but you can't know it until it is built.
That is my understanding. Let me know where I am wrong.