In places where the EB is very essential and interruption is not allowed it our duty to ensure always the power is supplied. MIDEE static transfer switch provides the solution for the task. Here input supply is taken from 2 ups source and a raw stabilized supply is taken as the third source when ever the ups 1 fails the unit automatically transfers to the ups2 as source. Incase if both the ups fails the unit automatically gets connected to the stabilizer output. When the up1 resumes back the unit automatically transfers to the ups1 source or the ups2 source which ever resumes. The unit can be designed for any current capacity say 10a, 20A, 30A, 40A, 50A and so on. Al the inputs and outputs are provided with MCB's and backup fuses and a voltmeter to read the output voltage. LED status indicators are provided to indicate the status.