28-10-2014, 04:45 PM
In developing countries, the instabilities that arise from choice of automation of electric power or power supply backup electricity and alternative energy, if the conversion is the process of hand-operated, is not only a great deal of time has been wasted, and may damage the device or machine on switch connection to human error, incurring huge losses.
Here is one you can easily install in residential and Office premises, single-phase equipment using digital phase selector and three-phase power is available. When any one phase fails, it will automatically select an available line (three phase line or reserve line). The device includes a phase (or inverters) detection, control logic and relay driver part. The phase detection circuit with R,Y,B and the sensing part of the inverter, which detect the existence of R,Y,B and inverter. The control logic to determine priority for phase 1 included four lines. Order of precedence of the phase is the r-phase, followed by y, phase b, and then back up (inverter). , Based in part on the relay drive circuit receives signals from the control logic to drive the relay. Power supply to provide power to control logic circuit and the relay driver part.