how to to measure L1phase , L2 Phase and L3 Phase for phase shift difference for same 50Hz frequency sine in microcontroller

[Dhananjaya]

I want measure 3 phase lines (Phase to Phase 380-440V)  these three sine wave signals with same 50Hz frequency . zero crossing for these three lines like +ve as well as –ve half cycles.   I want to  measure phase shift between these three signals. phase angle i.e 0 degree for L1 phase , 120 degree for L2 phase  and 240 degree for L3 phase these three lines voltages reduced by resistors so i want measure particularly which phase failure or two phases are same and these three phase are different i.e for the purpose of 3 phase available , 2 phase available or single phase available so i want C code in MPlab in PIC 16F676 micro controller with internal 4 MHz oscillator.

 

how can i find out is three three phase available or not… please guide me…

[Prabakaran P M]

For checking the Phase presence, i would suggest you to go for digital checking of the phases using a transformerless AC-DC conversion.

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