Overcurrent Relay Characteristics: The operating time of all Overcurrent Relay Characteristics tends to become asymptotic to a definite minimum value with increase in the value of current. This is inherent…
Important Questions of Protective Relays: 1. What is protective relay ? Explain its function in an electrical system. 2. Discuss the fundamental requirements of protective relaying. 3. Describe briefly some…
Important Questions of Dynamic Electric: 1. A gear train system used to drive a load is shown in Fig. P2. Assuming the ideal conditions of no back lash and no…
Traction Drive Rating and Energy Consumption: Traction Drive Rating and Energy Consumption - The speed-time curve of Fig. I0.6(a) is reproduced in Fig. 10.9. For simplification in calculations, it is…
Driving Axle Code for Locomotives: Driving Axle Code for Locomotives - Weight of the locomotive is supported on axles which are coupled to wheels. The weight per axle is limited…
Coefficient of Adhesion in Traction: In Coefficient of Adhesion in Traction, the task of driving equipment consists of pushing the carriage on which it is mounted and pulling coaches and…
Switched Reluctance Motor: The switched reluctance motor (SRM) has both salient pole stator and rotor, like variable stepper motor, but they are designed for different applications, and therefore, with different…
Operation of Synchronous Motor: Operation of Synchronous Motor - For any speed other than synchronous speed, the relative speed between air gap flux wave and the rotor is not zero.…