Why Three Phase System Preferred Over Higher Phases?
A three-phase system is universally employed for a generation, transmission, and distribution of electric power. There are several reasons for … Continue Reading
Electrical Machines
Capacitor Voltage Transformer (CVT or CCVT) – Construction & Working
Capacitor Voltage Transformer (CVT) or Capacitor Coupled Voltage Transformer (CCVT) is a switchgear device used to convert high transmission class … Continue Reading
Steam Power Stations – Arrangement and Working
Steam power stations convert the heat energy of coal combustion into electrical energy. A steam power station basically works on the … Continue Reading
AC Single Phase Motors
Single phase motors are the most familiar of all electric motors because they are extensively used in home appliances, shops, … Continue Reading
Production of Rotating Magnetic Field
The production of Rotating magnetic field in 3 phase supply is very interesting. When a 3-phase winding is energized from … Continue Reading
Objective Questions on Alternators | Part 4
46. The windings for an alternator are I. 36 slots, four poles, span 1 to 8 II. 72 slots, six … Continue Reading
Objective Questions on Alternators | Part 3
Part 1Part 2Part 3Part 4Part 5 31. In order to reduce the harmonics in the emf generated in an alternator … Continue Reading
Objective Questions on Single Phase Motors | Part 3
31. The type of starting relay used on single phase hermetic motor is (A) hot wire relay (B) timing relay … Continue Reading
Speed Control of DC Motor (Shunt, Series and Compound)
Speed control of dc motor is achieved using different methods. There are three types of dc motors. For each of … Continue Reading
Speed Control Of DC Series Motor
DC series motors are used in many applications because of their high starting torque and speed/torque characteristics. Hence speed control … Continue Reading