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THE COST OP AN ELECTRICITY SUPPLY
MEASUREMENT OP ELECTRICAL ENERGY
in MEASUREMENT OP 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 current transformer device dial dial-test disc eddy currents electricity element error curve fault feeders fixed charge flux frequency friction compensator full load gear induction meter jewel kVAh lagging P.F. maximum demand measured mechanism mercury meter error 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 rotation rotor scale secondary shown in Fig shunt sine meter single-phase meters solenoid speed spindle standard sub-standard sumer summation meter sun wheels supply switch tariff temperature coefficient terminals test card test room tester three-phase three-wire tion Two-part Tariff type of meter usually vector voltage watt-hour meter wattmeter watts wheel whilst wire zero