An electrical machine is a device that convert the electrical energy into mechanical energy and vice versa. Transformer is also…
Q. Explain different types of faults? A. Shunt Faults: Basically shunt faults are short circuits. When the path of the load current…
Q. Mention some of the applications of Directional Over-Current relays? A. 1. Double end fed power system 2. Single end…
WHY STAR DELTA STARTER IS PREFERRED WITH INDUCTION MOTOR? Star delta starter is preferred with induction motor due to following…
Q:What is the difference between Isolator and Circuit Breaker? A:Isolator is a off load device which is used for isolating…
There are two practical ways by which commutation may be improved. These methods are, 1. Resistance commutation and 2. E.M.F.…
Q1.What is the principle of the DC Motor ? A. If the current carrying conductor is placed in the maganetic…
According to the speed equation of a d.c. motor we can write, The factors Z, P, A are constants for…
Speed Control of D.C. Series Motor (Part2) 2. Rheostatic Control In this method, a variable resistance (Rx) is inserted in…
Speed Control of D.C. Series Motor (Part1) The flux produced by the winding depends on the m.m.f. i.e. magnetomotive force…