Circuit Breaker Tester Classification: Circuit Breaker Tester can be classified into two main groups, viz. (i) type tests and (ii) routine tests. Type Tests: These are performed solely for the…
DC Circuit Breaker: Light duty DC Circuit Breaker have been in use since long. However, with the latest developments in HVDC transmission there would naturally be the necessity of the…
Motor Protection: Motor Protection - There is a wide range of motors in existence for various purposes. However, the fundamental problems affecting the choice of protection are independent of the…
Prime Mover Protection: In the event of prime-mover failure the machine starts motoring meaning thereby that it draws electrical power from the system and drives the prime-mover. This condition imposes…
Power Swings in Power System Protection: The impedance measured or seen by a distance relay during normal load is shown in Fig. (5.29). Normally this would be outside the tripping…
Induction Motor Drives Articles: Three Phase Induction Motors: Three Phase Induction Motors are of two types: squirrel-case and wound-rotor. In squirrel-cage, the rotor consists of longitudinal conductor-bars shorted by circular…
DC Motor Drives Articles: Types of DC Motor: The commonly used Types of DC Motor are shown in Fig. 5.1. In a separately excited motor, the field and armature voltages…
Use of Efficient Semiconductor Converters: Prior to development of Use of Efficient Semiconductor Converters, inefficient power modulators were employed in several applications. While replacement of these power modulators by the…