Why do you want 10V? you need to check if your CT is able to produce 10V without going into saturation.To get say 10V from C.T. output I have to use 13.34R or approx 15R but problem is power dissipation in resistor.
You know:I can max use 2W resistor for burden.
Yes, device is only for measuring phase angles and then power factor. Voltage and current magnitudes are not measured. P.T. and C.T. are used. 3x qty each.
Why can't be harmonics bypassed using low pass filter ? Harmonics will have higher frequency than fundamental frequency.
Generally not. Power factor is ratio P.F. = P/√(P²+Q²+D²), with P = real power, Q = reactive power, D = deformed (harmonic) power. If you filter out fundamental voltage and current, you see only real and reactive power. Harmonic components present in the ZCD input can cause measurement error with the discussed zero crossing method.Of course you can bypass the harmonics. The question that will be asked: is the power factor same with OR without harmonics?
To supress the harminics you need a low pass filter. A first order filter won´t do the job, thus you need a higher order filter.is the power factor same with OR without harmonics?
I will filter out the harmonics using low pass filters for 3x V ZC channel and 3x I ZC channels. I have a new idea. Can I do like this ?
Why unpredictable? Using identical filters for voltage and current (with sufficient harmonic supression) will give the exact fundamental phase shift. If you want just this information, the method is straightforward.Of course you can do whatever you want but the question will remain: the phases will get shifted by unpredictable amount.
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