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Old 09-21-2011, 07:48 PM   #16
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Just a general question on 220VAC


Here is the same picture, with values corrected:
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Just a general question on 220VAC-acpowerprimer.jpg  

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Old 09-21-2011, 09:45 PM   #17
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Just a general question on 220VAC


In the above sine wave sketch, the positive and negative peaks should be approx.170 volts and the peak to peak approx. 340 volts. 120 and 240 are the RMS of the peak voltages. RMS can be thought of as the DC equivalent of the peak wave. RMS = .732 x peak voltage
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Old 09-21-2011, 10:14 PM   #18
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Just a general question on 220VAC


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Originally Posted by rjniles View Post
In the above sine wave sketch, the positive and negative peaks should be approx.170 volts and the peak to peak approx. 340 volts. 120 and 240 are the RMS of the peak voltages. RMS can be thought of as the DC equivalent of the peak wave. RMS = .732 x peak voltage
Oh stop being so picky. A graph can be scaled to RMS and nobody said it was an O'scope display. I don't see anything showing it is 16.7ms between peaks.....
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Old 09-21-2011, 11:40 PM   #19
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Just a general question on 220VAC


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Oh stop being so picky. A graph can be scaled to RMS and nobody said it was an O'scope display. I don't see anything showing it is 16.7ms between peaks.....
Well.....actually, it's 16.6666666666666666666667 ms...

And the RMS value is only if it is a true sine wave....toss any any harmonics and the RMS voltage/peak can be all over the place.....

Remember CVT's? Ever see the waveform that comes out of those things? Yuk......

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