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Powerfactor and Frequency Meters
Measurement of Power Powerfactor
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A.C. circuits accuracy adjusted alternating alternating current ammeter ammeters and voltmeters amount ampere-hour amperes amps balance calibrated cent Chapter conductor conduit connected in series current and voltage current coils current flowing current passing current transformer deflection direct current disc earth eddy currents effect electrical electrode element energy meter equipment Evershed & Vignoles fault frequency fuse galvanometer give indicating instrument induction installation insulation resistance lamp leads load magnetic field magnitude maximum maximum-demand measured mechanism method Metropolitan Vickers motor moving coil moving system moving-iron normal obtained ohmmeter ohms operation phase pivoted pointer position potential transformer potentiometer power factor power-factor meter range rated ratio rectifier resistor rotation rotor scale shown in Fig shunt single-phase spindle standard Substandard suitable supply switch temperature terminals test set three-phase torque Vignoles Ltd volt-amperes voltage and current voltage coil voltage drop voltmeter volts watt-hour meter wattmeter watts Wheatstone Bridge wire zero