Electrical Instruments and Measurements |
Contents
CHAPTER PAGE | 9 |
POWERFACTOR AND FREQUENCY METERS | 110 |
MEASUREMENT OF POWER POWERFACTOR | 121 |
Copyright | |
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A.C. circuits accuracy adjusted alternating alternating current ammeter amount ampere-hour amperes amps balance calibration cent conductor conduit connected in series Crompton Parkinson current and voltage current coils current flowing current passing current transformer damping deflection diagram direct current disc earth eddy currents effect electrical electrode element energy meter equipment Evershed & Vignoles fault frequency fuse galvanometer give induction installation instantaneous insulation resistance iron lamp leads load magnetic field magnitude maximum maximum-demand measured mechanism method Metropolitan Vickers motor movement moving coil moving system moving-coil instrument normal obtained ohmmeter ohms operation phase pivoted pointer position potentiometer power factor power-factor meter Precision Grade R₁ range ratio rectifier resistor rotation rotor scale shown in Fig shunt single-phase spindle standard suitable supply 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