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3-phase voltage monitor, phase reversal

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id_ruben

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I got the scheme from a 380VAC voltage monitor, where the device has the ability to detect phase reversals and detect voltage levels.

https://drive.google.com/open?id=1HmntXd_m6UNQM8ECU9T4-cpuA9Jnm5lt

I have tried simulating in LTSPieceXVII and giving a 1.7V DC voltage to the output.
But I don't know how this circuit works and the formula is mainly on R1, R2 and C1.
Please help me about the workings of the circuit and formulas, so that I can determine the exact component value so that I can design the output of the tool that is in accordance with the ADC level (+ 5V).
I really appreciate every assistance given
thank you
 

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  • schema_3-phase_voltage-monitor_phase-reversal.png
    schema_3-phase_voltage-monitor_phase-reversal.png
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  • In_Diode-TP1_TP4.png
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  • out_TP7.png
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I got the scheme from a 380VAC voltage monitor, where the device has the ability to detect phase reversals and detect voltage levels.
Click to expand...
How can a single DC output signal represent phase and voltage level at the same time?

The shown circuit has at least inappropriate RC dimensioning (480k * 1 µF = 480 ms), should be in a 1/ω range to give effective phase shift, e.g. C = 5 to 10 nF. Then you get a significant response to phase reversal.

I still wonder how you arrived at the specific schematic.
 

I got the scheme from a 380VAC voltage monitor, where the device has the ability to detect phase reversals and detect voltage levels.
Click to expand...

TP_2 and TP_3 are same; just make them symmetrical.

locate zero crossings for all the three signals at the three phases.

Use them to decide the sequence: ABC or ACB.

Voltage levels can be used to decide phase faults (loss of one phase).
 

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