3 phase ac voltage sensor and its interfacing with micro controller

[shiven]

Hi everyone
i am working on project in which i have to fetch data from a 3 phase ac power supply and monitor it and correspondingly control a water pump depending upon the power supply status. Please guide me about the sensors and the controllers that i can use .






Thanking you in advance

 

[zia]

what do u mean by fetch data...... use optocoupler with 220k resistor for each phase having star configuration

 

[shiven]

what do u mean by fetch data...... use optocoupler with 220k resistor for each phase having star configuration

Thank you and I am really sorry for wrong word selection. I just wanted to check the status of the power supply and depending on that perform certain function by controller. I think a simple rectifier circuit will do a good job too.

 

[zia]

yes but it is little expensive

 

[jmsattard]

You can just use rectify the signal and then use a voltage divider circuit to measure the voltage using the microcontroller. Altough this won't be isolated so be careful when handling your circuit. For switching the motor water pump if all you want is to switch on and off you can just use a Solid state relay they can be found very cheap on ebay.