Power and Power Factor Articles: Instantaneous Power Formula: Instantaneous Power Formula – In a purely resistive circuit, all the energy delivered by the source is dissipated in the form of…
Tariffs and Power Factor Improvement Interview Questions and Answers: 1. What is meant by tariff? Ans. Tariff means the schedule of rates or charges. Tariff, in case of electric supply,…
Leading Power Factor Load: Suppose the load in Fig. 9.46(a) is capacitive, the wattmeter connected in the leading phase would read less value. In that case, WR will be the…
Power Factor by Two Wattmeter Method: When we talk about the power factor in three-phase circuits, it applies only to balanced circuits, since the power factor in a balanced load…
Important Questions of Power Factor Improvement: 1. Why is there phase difference between voltage and current in an a.c. circuit ? Explain the concept of power factor. 2. Discuss the…
Power Factor Improvement Methods: There are many drives which operate at a low power factor. Some of Power Factor Improvement Methods are: An induction motor direct on line. ac-dc diode…
Power Factor Improvement Articles: Power Factor: The electrical energy is almost exclusively generated, transmitted and distributed in the form of alternating current. Therefore, the question of power factor immediately comes…
Power Factor Correction Circuit: To calculate Power Factor Correction Circuit, Consider an inductive load taking a lagging current I at a power factor cos Φ1. To develop Power Factor Improvement…