Power Equation Of A D.C. Motor
The voltage equation of a d.c. motor is given by, V = Eb + Ia Ra Multiplying both sides of the above equation by…
D.C Generator Interview Questions
Q. Principle of operation of a generator? A. An electric generator is a machine that converts mechanical energy into electrical energy. An…
Electrical Engineering Interview Questions Complete List
Electrical Engineering Interview Questions Part 1 Electrical Engineering Interview Questions Part 2 Electrical Engineering Interview Questions Part 3 Electrical Engineering Interview Questions Part 4 Electrical Engineering…
Load Sharing By Two Transformers
Let us consider the following two cases: Equal voltage ratios. Unequal voltage ratios. 1.39.1 Equal Voltage Ratios Assume no-load voltages EA and EB are identical and…
Sumpner’s Test
To determine the rise of maximum temperature of a transformer, its load test is of utmost importance. Using suitable load impedance, small…
Three Phase Induction Motor
1.Introduction An electric motor is a device which converts an electrical energy into a mechanical energy. The motors operating on a.c. supply…
Torque Equation Of Three Phase Induction Motor
The torque produced in the induction motor depends on the following factors : 1. The part of rotating magnetic field which reacts…
Torque-Slip Characteristics In Three Phase Induction Motor
As the induction motor is located from no load to full load, its speed decreases hence slip increases. Due to the increased.…
Transformer Oil
Transformer oil is a mineral (clean hydrocarbon) oil, which is obtained by refining crude petroleum. It has the following purposes: It provides…
Total Approximate Voltage Drop Of A Transformer
During no-load condition, induced voltages at the primary and secondary windings are equal to the applied voltage and secondary terminal voltage respectively.…