Perfect electronics offers mosfet-based 50 hz sine wave ups cum eps. Visual indication s provided for mains, back up, low battery state, mains low voltage cut at 170 volts, high voltage cut at 270 volts and blown fuse. It also includes the facilities of battery deep discharge cut or low battery cut, over load, short circuit protection, reverse battery polarity protection, spike voltage suppressor. It uses double-sided glass epoxy pth boards for all components including the mosfets along with the connectors for all external wiring. So pcb can be separated immediately without the solder for the maintenance. Cooling fan is used to prevent the damage of the mosfets for the long back up time. Output sine wave and square wave can be selected by the use of switch provided on backside of the panel. Change over time is less than 1 millisecond.
