hw do i conn. a transformer on 1 of the phases of the 3, on which i also want to conn. a pwr backup invertor?

Question

Currently the transformer supplies the backup invertor and then the backup invertor supplies to the light phase(5A wiring) in series. This way the voltage correction is not very effective (i live in an area with a lot of fluctuation in voltage ) . What i wud like is to connect the tranformer and the invertor in parrallel to the light phase so that voltage correction is more efficient ..... but the problem with that is ... then when the mains power fails and the backup invertor turns ON then the current will also flow from the invertor to the light phase to the transformer ,back into the supply from the govt. cable and to other ppl's houses!!! pls help

Answer 1

Where do you live? We only have two phases here. Anyway, you need a relay to open the incoming power when the inverter kicks in. Ideally, you should have an inverter on each phase, but phase control would be a problem unless you could find a 3 phase inverter. Perhaps a 3 phase alternator/generator? You still would need an auto disconnect relay to isolate your system from the main power grid, though.

'nuff said?

Answer 2

N.A.S.A had a system that would sense the dropout,start a small generator and switch the power. It has been a long tome but I think it was a co. called Micro Switch. It was fast enough that it didn't affect the computers.