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Units and Definitions associated with the Measurement of Electrical Quantities
Absolute and Secondary Measuring Instruments Potentiometers
15 other sections not shown
adjustment alternating current ammeter ampere-hour amperes applied voltage armature calibrated cent Clark cell coin connected in series constant current coil current passing current transformer decrease deflection dial test direct current disc driving torque eddy currents effect electro-dynamometer element employed fixed coils four-wire frequency friction compensating full load galvanometer gear illustrated in Fig increase instantaneous instrument kVAh kVArh latter load current means measurement mercury meter current meter under test method Metropolitan-Vickers motor moving coil moving system mutual inductance non-inductive operation pendulum permanent magnet phantom load phase angle phase-shifting pointer poles polyphase position potential coils potentiometer power factor pressure coil primary winding quadrature loop r.m.s. values reactance resistance rotation secondary current secondary winding series coil shunt single-phase single-phase meters slide-wire spindle substandard suitable summation sun-wheel supply switch temperature terminals thereby three-phase three-wire type of meter vector diagram voltmeter volts watt-hour meter wattmeter wheel whilst wire zero