Derivation of Single Phase Quantity from Three Phase System: It will be seen later that auxiliary channels or pilot wires are used to transmit information from one end of the…
Important Questions of Variable Load on Power Stations: 1. Why is the load on a power station variable ? What are the effects of variable load on the operation of…
Important Questions of Supply Systems: 1. What is electric power supply system ? Draw a single line diagram of a typical a.c power supply scheme. 2. What are the advantages…
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…
Electrical Drive Systems: Each Electrical Drive Systems is different from other Electrical Drive Systems. However, there are some common features associated with all Electrical Drive Systems. To understand them it…
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…
Energy Losses in Electrical Drive System: Energy conservation in electrical drive is achieved by reduction of losses in its various parts. Typical Energy Losses in Electrical Drive System include the…
Diesel Electric Traction System: Because of high initial cost, electric traction is justified only where there is sufficient volume of traffic. Diesel Electric Traction System is preferable where the traffic…