Types of DC Generator – Series, Shunt and Compound
A DC generator requires MMF to establish flux in its magnetic circuit. The MMF necessary to establish flux in the … Continue Reading
Objective Questions on Single Phase Motors | Part 1
Part 1Part 2Part 3Part 4Part 5 1. A capacitor start single phase induction motor will usually have a power factor … Continue Reading
MCB (Miniature Circuit Breakers) – Types, Working and Trip Curves
MCB or Miniature Circuit Breaker is an electromechanical device that protects an electric circuit from an overcurrent. The overcurrent in an electrical circuit may … Continue Reading
SF6 Circuit Breakers – Construction, Types and Working
In an SF6 Circuit breaker, sulphur hexafluoride gas is used as the arc quenching medium. The sulphur hexafluoride gas (SF6) is … Continue Reading
Split Phase Induction Motor – Operation and Characteristics
Before going to the operation and characteristics of split-phase induction motor we should first understand why single phase induction motor … Continue Reading
Current Transformers – Windings and Rated Insulation Levels
A current transformer is an instrument transformer in which the current ratio is within the specified limit. The primary winding … Continue Reading
Construction of DC Machine (Generator & Motor)
The dc generators and dc motors have the same general construction. In fact, when the machine is being assembled, the … Continue Reading
Substation Design Criteria and Studies
The most appropriate type of substation depends on such factors as voltage level, load capacity, environmental considerations, site space limitations, … Continue Reading
Circuit Breaker Ratings
The rating of circuit breaker is given according to the duties that are performed by it. For complete specifications, standard … Continue Reading
Lightning Arrester – Location, Rating and Selection
A lightning arrester is connected to protect a piece of equipment from lightning and switching surges. Overvoltages may cause the … Continue Reading