Course for electrical metermen
Educational Committee, National Electric Light Association, 1928 - Technology & Engineering
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alternating current ammeter amount amperes armature brush clamp screw commutator compensating conductor current coils current flows curve damping magnets decreases the speed direct current direct-current meters direction disc speed eddy currents effect Electrical Metermen electromagnet energy example Figure friction Full-load adjustment gear increase inductive iron laboratory lag adjustment lamps lesson light light-load adjustment lines of force load loop lower bearing magnetic circuit magnetic field magnetic flux manufacturers measured ment mercury Meter Committee meter under test method motor number of revolutions Ohm's Law ohms operating permanent magnets pivot pointer pole position potential circuit potential coil potentiometer power factor produced reactance reading register ratio resistance result Right-Hand Rule rotating element rotating standard rule Sangamo scale shown in Fig shows shunt Single-Phase temperature test constant tester three-wire tion top bearing torque types of meters voltage voltmeter volts watthour constant watthour meter wattmeter watts whole number winding wire zero