POWER MEASUREMENT IN THREE-PHASE SYSTEMS The power, in watts, taken by a three-phase, three-wire system can be measured with two wattmeters. This method can be used to measure the power in a three-wire wye system or in a three-wire delta system. The Two-Wattmeter Method Figure 10–14 shows the standard connections for the two-wattmeter method. In […]
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Alternating current fundamentals
Three-Phase Systems : Power measurement in three-phase systems
POWER MEASUREMENT IN THREE-PHASE SYSTEMS The power, in watts, taken by a three-phase, three-wire system can be measured with two wattmeters. This method can be used to measure the power in a three-wire wye system or in a three-wire delta system. The Two-Wattmeter Method Figure 10–14 shows the standard connections for the two-wattmeter method. In […]
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Three-Phase Systems : Power in the wye system, The delta connection and Power in the delta system.
POWER IN THE WYE SYSTEM The value of volt-amperes produced in each of the three single-phase windings of the three-phase generator is Volt-amperes = Vcoil X Icoil If the voltage and current values of the wye system are balanced, the total volt-amperes produced by all three windings is Total Volt-amperes = 3 X Vcoil X […]
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Three-Phase Systems : Power in the wye system, The delta connection and Power in the delta system.
POWER IN THE WYE SYSTEM The value of volt-amperes produced in each of the three single-phase windings of the three-phase generator is Volt-amperes = Vcoil X Icoil If the voltage and current values of the wye system are balanced, the total volt-amperes produced by all three windings is Total Volt-amperes = 3 X Vcoil X […]
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AC Parallel Circuits : Parallel circuit with branches containing R, XL, and XC and Parallel circuit resonance.
PARALLEL CIRCUIT WITH BRANCHES CONTAINING R AND XC Another type of parallel circuit is shown in Figure 8–6. In this circuit, two branches contain noninductive resistance loads and a third branch contains a capacitor. Assuming that the capacitor has negligible resistance, the current in the capacitive branch leads the line voltage by 90 electrical degrees. […]
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AC Parallel Circuits : Parallel circuit with branches containing R, XL, and XC and Parallel circuit resonance.
PARALLEL CIRCUIT WITH BRANCHES CONTAINING R AND XC Another type of parallel circuit is shown in Figure 8–6. In this circuit, two branches contain noninductive resistance loads and a third branch contains a capacitor. Assuming that the capacitor has negligible resistance, the current in the capacitive branch leads the line voltage by 90 electrical degrees. […]
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Series–Parallel Circuits : Admittance, conductance, and susceptance
Series–Parallel Circuits ADMITTANCE, CONDUCTANCE, AND SUSCEPTANCE Admittance Impedance is the measurement of the opposition to electron flow in a circuit containing resistance and reactance. The unit of admittance is a measurement of the ease of electron flow through a circuit or component containing resistance and reactance. This means that admittance is the inverse, or reciprocal, […]
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Series–Parallel Circuits : Admittance, conductance, and susceptance
Series–Parallel Circuits ADMITTANCE, CONDUCTANCE, AND SUSCEPTANCE Admittance Impedance is the measurement of the opposition to electron flow in a circuit containing resistance and reactance. The unit of admittance is a measurement of the ease of electron flow through a circuit or component containing resistance and reactance. This means that admittance is the inverse, or reciprocal, […]
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AC Parallel Circuits : Correcting motor power factor
CORRECTING MOTOR POWER FACTOR It is sometimes necessary to correct the power factor of a motor. The following procedure can be used to perform this task. Before the power factor of a motor can be corrected, it must first be determined how much out of phase current and voltage are with each other. In the […]
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AC Parallel Circuits : Correcting motor power factor
CORRECTING MOTOR POWER FACTOR It is sometimes necessary to correct the power factor of a motor. The following procedure can be used to perform this task. Before the power factor of a motor can be corrected, it must first be determined how much out of phase current and voltage are with each other. In the […]
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