Hi Guys,
Thanks you for your valuable suggestions and support.
Let me explain what I am going to do.
I brought a kit from market which is called 3 phase protection device. If any phase from the 3 phase get too high or too low it will turn OFF the relay. The relay is connected to the external Magnetic Contactor and is driving the load.
Following is the picture of this protection device
Front Side:
Back Side:
In this Circuit, Voltages of 3 phase are measured by mentioned bridges as I showed you in circuit diagram.
Microcontroller Name is not written as the manufacturer removed its name.
Power supply is created by only 1 phase, not from 3 phase.
Following is the circuit which i have trace and understand so far
How this circuit is working? is it very badly designed or properly designed?
It is some low cost solution and i want to develop this using microcontroller and want to add LCD and keypad to set some parameters.
So guys guide me about this. I know you already have guided me.
If it is not the perfect solution then i will go for the solution which you guys are telling me.
waiting for your kind response