automatic changeover using micro controller

Automatic transfer switch for generator, in this project you will learn about mostly used circuit of automatic transfer switch for small power generators. There are many automatic transfer switches are available in market. Some of them are expensive and some are cheap. The reason behind their price difference is type of technology used. There are two kind of Automatic transfer switches are available in market. Analog electronics based automatic transfer switch and digital electronics based automatic transfer switches. Analog electronics based transfer switches use analog electronics in their circuit like operational amplifier , comparators, transistors, diodes and mechanical relays etc. But there is no digital display in analog electronics based transfer switches. Digital automatic transfer switches are most commonly used now a days. Because it use liquid crystal digital display to show values of current and voltage to user. It also shows the status of AC main power and generator to show which power source is currently being feed to load. You can use as many functionalities as you want. Some examples are given below :

Over voltage and over current protection
Battery status or amount of battery charging available
protection alarm and many others.