Description: F3 VSR 3 is microprocessor based phase selector that can avoid generator operation by shifting the single phase loads to the healthy phase. It senses the unhealthy phase and automatically switches the connected single-phase load to the healthy phase. Two single phase loads can be operated on only healthy phases and avoid the undesired generator set operation at unmanned sites. It protects - single phase loads against under voltage and over voltage conditions. When two or more phase is unhealthy then it switches off the output supply and gives an alarm. It is provided with alarm relay that automatically resets when healthy supply resumes. It is provided with 5 separate relays out puts are provided for connecting the two external single-phase loads though suitable contactors. The selectors comprise of potentiometers that sets the unhealthy parameters like and under voltage and over voltage on each phase.
