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From: Peter Bennett (no email)
Date: Tue May 29 2007 - 20:36:54 EDT
Tuesday, May 29, 2007, 3:52:28 PM, Gil wrote:
GJ> Jeff, I'm confused. 110VAC is 110-120VAC, meaning that it's
GJ> peak to peak voltage is 110. Use any AC voltmeter and you'll
GJ> likely read something between 110 and 125 VAC. If they are
GJ> suggesting a different method of measuring the voltage, it would
GJ> be helpful to understand. Not having that point of reference
GJ> would make it impossible to troubleshoot a suspected voltage
GJ> problem.
No. AC voltage is normally specified as the RMS (Root mean square)
value. AC of a given RMS voltage will produce the same power as DC of
the same voltage.
The peak voltage of a sine wave is 1.4 times the RMS value - hence
120VAC RMS has a peak voltage of 168 volts. Peak-to-peak voltage is
2.8 times the RMS value.
>From some previous comments (Arilds?), apparently some generators
produce a distorted waveform, with flattened (and therefore lower
voltage) peaks.
GJ> "In order to meet its ratings, 164 peak volts are required. A
GJ> battery charger uses only the top portion of the input sinewave.
GJ> Therefore, small variations in peak voltage results in large
GJ> variations in the amount of the waveform that the charger has to
GJ> work with. Standard public power of 117V has a peak voltage of
GJ> 164V."
GJ> Gil
-- Peter Bennett, VE7CEI Vancouver, B.C., Canada Lien Hwa 28 (AKA Polaris 30) "Sea Spray" GPS and NMEA info: http://vancouver-webpages.com/peter Vancouver Power Squadron: http://vancouver.powersquadron.ca _______________________________________________ http://lists.samurai.com/mailman/listinfo/trawlers-and-trawlering To unsubscribe send email to with the word UNSUBSCRIBE and nothing else in the subject or body of the message. Trawlers & Trawlering and T&T are trademarks of Water World Productions. Unauthorized use is prohibited.
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