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The Cost of an Electricity Supply
Measurement of Electrical Energy
Measurement of Maximum Power Demand
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0.5 lagging 3-phase adjusted ammeter ampere-hour Amperes armature balance bench calibrated causes cent coin connected constant consumer consumer's correct credit index current circuit device dial dial-test disc eddy currents electricity element error curve fault feeders Ferranti fixed charge flux frequency friction compensator full load gear induction meter jewel kVAh lagging P.F. maximum demand measured mechanism mercury meter engineer meter error meter under test method Metropolitan-Vickers motor necessary obtained operation P.P. meter pendulum phase angle error pivot pointer polyphase position potentiometer power-factor pressure circuit pressure coil proportional ratio error reading resetting resistance revolution counter rheostat rotating rotor scale secondary shown in Fig shunt single-phase meters solenoid speed spindle standard sub-standard suitable sumer summation meter sun wheels supply switch tariff test card test room tester three-phase tion Two-part Tariff type of meter usually vector voltage voltmeter watt-hour meter wattmeter watts wheel whilst wire zero