Вольтметр середньоквадратичної напруги

Abstract

A voltmeter of root-mean-square voltage includes connected in series scaling transformer, transformer of amplitude voltage, comparator to input of which a source of reference voltage and indicator of overload are connected, linear transformer, measuring indicator, at that the output of the scaling transformer is connected to the high-frequency amplifier, this in its turn is connected to a supplementary linear transformer output of which is connected to the input of voltage divider and the output of that one is connected to indicator of frequency error. Besides that there is included an adding amplifier inputs of which are connected to the output of the scaling transformer and the output of voltage divider, and the output of adding amplifier is connected to the linear transformer that is connected to the output of voltage divider and measuring indicator.