single ph transformers

is it pos to use single ph transphormers to bost my 220 3ph to 440 some on here had a wireing digram for doing that possably

Yes you may use three single phase transformers to boost 220 3 phase to 440 3 phase. It can even be done with two transfomers creating an open delta but I recommend the three transformer confgiguration.

I am not sure if I can describe the connections simply but I will try:

Each primary winding will be connected with one and only one primary winding of another transformer. This results in exactly three connections (with all three transfomers connected in series). Connect one of each of the three incoming phases to each of these three connections. The secondary side should be wired exactly like the primary side except connect one output lead (instead of an incoming phase) to each of the three connections between the transformers.

Another description is draw a triangle. Replace each side of the triangle with the both inputs of one transformer. Connect one of the three incoming phases to each point of the triangle. Repeat this for the outputs.