For the induction machines in the lab, how can the 3-phase power input be measur

Question

For the induction machines in the lab, how can the 3-phase power input be measured? Why are other methods unsuitable? How can the rotational speed of a 4-pole induction machine be varied from 3600 rpm to 6000 rpm? When determining parameters for a transformer, which test causes saturation? Why? What parameters need to be determined for an induction machine/synchronous machine/transformer? Give detailed explanations/demonstrate these tests. Explain whether a given set of data could be valid for a given machine. Possible things to look for include: input/output power discrepancies, frequency/rpm discrepancies, voltage/current phase angle discrepancies, improper methods used to calculate power. Explain the saturation curve for a synchronous machine.

Explanation / Answer

#In the induction machines there are two methods to measure three phase input power. One method is using 2 wattmeters and other method is 3 wattmeters. As the 2 wattmeter method is less complex it is used mostly in the laboratory.

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