Experiment_4_Three-Phase_Circuits (1)

# Experiment_4_Three-Phase_Circuits (1) - Experiment 4...

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4 1 Experiment 4 Three-Phase Circuits OBJECTIVE To study the relationship between voltage and current in three-phase circuits. To learn how to make delta and wye connections. To calculate the power in three-phase circuits. DISCUSSION Students tend to approach three-phase circuits with a certain apprehension which is not at all justified. Three-phase circuits, in the majority of cases, are symmetrical. They consist of three identical branches, each of which has the same impedance. Each of these branches can be treated exactly like a single-phase circuit. Consequently, three phase circuits are not necessarily harder to work with than single-phase circuits. Unbalanced three-phase circuits represent an unnatural condition. Circuit analysis becomes somewhat difficult and will not be covered in this manual. Three-phase systems are usually connected by either a delta or a wye configuration. Each of these connections has definite electrical characteristics and the designations delta and wye are derived from the method of connection. EQUIPMENT REQUIRED Workstation AC power supply, AC Voltmeter, AC Ammeter, Resistance Module

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2 PROCEDURE CAUTION! High voltages are present in this Experiment. Do not make or modify any banana jack connections with the power on unless otherwise specified! The grading in this section is 0.5 point for each correct answer. 1. a. Using your Power Supply and AC Voltmeter connect the circuit shown in Figure 4-1.
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Experiment_4_Three-Phase_Circuits (1) - Experiment 4...

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