Electrical Instruments and Measurements |
Contents
CHAPTER PAGE I FUNDAMENTAL PRINCIPLES | 9 |
AMMETERS AND VOLTMETERS | 35 |
WATTMETERS | 54 |
Copyright | |
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A.C. circuits accuracy adjusted alternating alternating current ammeter amount ampere-hour amperes amps angle balance battery calibrated cent CHAPTER conductor conduit connected in series current and voltage current coils current flowing current passing current transformer damping deflection direct current disc earth eddy currents effect electrode element energy meter equipment Evershed & Vignoles fault frequency fuse galvanometer give indicating instrument induction installation instantaneous insulation resistance lamp leads load magnetic field magnitude main switch maximum maximum-demand measured mechanism method Metropolitan Vickers motor moving coil moving system moving-iron normal obtained ohmmeter ohms phase pivoted pointer position potentiometer power factor power-factor meter R₁ range rated ratio rectifier resistor rotation rotor scale shown in Fig shunt single-phase spindle standard Substandard 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