my aplication is that if you are genareting power through say INVERTER OR UPS you are having a seperate supply of your own NOw if the mains power somehow combine with the inverter output due to faulty wiring
there is possibility of damaging the mosfets of inverter circuit . i want to sence this and immidiately stop the output of the inverter drive.
THis is similar to shorting of two phases but not the same .
by direction of ac current i mean that
1] in case of healthy condition the ac current will flow from inverter transformer to load.
2) in case of fault current will flow from mains to trasformer output i.e reverse due to shorting of main and inverter phase hence damaging the ckt.
What i want is to detect the above change immediately and instuct the mc to stop the drive cktin few milli seconds
ankas