A voltmeter for the measurement and comparison of peak and r.m.s. values of recurrent voltage waves
作者:
D.E.M.Garfitt,
期刊:
Journal of the Institution of Electrical Engineers - Part II: Power Engineering
(IET Available online 1948)
卷期:
Volume 95,
issue 46
页码: 407-410
年代: 1948
DOI:10.1049/ji-2.1948.0105
出版商: IEE
数据来源: IET
摘要:
The construction is described of a voltmeter circuit suitable for the measurement of d.c. 50-c/s peak, and 50-c/s r.m.s. voltages. This circuit has a range of 200–1000 volts, and can be used with a reistance potential divider for measurements up to 120 kV. It consists essentially of an electrostatic instrument in combination with a diode rectifier and a reservoir capacitor. With the present apparatus the accuracy of measurement is estimated to be within ± 2% for d.c. voltages and ± 3% for 50-c/s voltages. Peak factors should be measurable to ± 1%, and ripple voltages on d.c. supplies to within 10% of the ripple, i.e. to 1% of the full voltage for 10% ripple.
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