Air blast circuit breaker employs a high-pressure air blast as an arc quenching medium. The construction and working of different … Read moreAir Blast Circuit Breaker – Construction, Working and Types

A circuit breaker is a switching device which can be operated manually as well as automatically for controlling and protection … Read moreDifferent Types of Circuit Breakers

The operating principle and arc forming phenomenon were explained in the previous article. Now it is very important to extinct … Read moreMethods of Arc Extinction in Circuit Breaker

DC motor fault zone analysis is a vital plan of any DC motor maintenance program. Several troubles may arise in a … Read more4 Major Troubles in a DC Motor with Reasons

1. Overall efficiency of steam locomotive system is close to (A) 5 to 10%(B) 25 to 30%(C) 55 to 60%(D) … Read moreObjective Questions on Electric Traction – 1

The substation earthing system comprises of a grid (earth mat) formed by a horizontal buried conductors.  Read about design of substation … Read moreSubstation Earthing System ( Grounding System ) – Earthing Mat

The losses in a dc machine (generator or motor) may be divided into three classes viz  Copper losses  Iron or core … Read moreLosses in DC Machine ( DC Generator and Motor )

Before reading Split Phase and Capacitor Start Induction Motors, please read the previous article, Why a Single Phase Induction Motor … Read moreSplit Phase and Capacitor Start Induction Motors

The power transformer and distribution transformer are an important part of an electrical power distribution network. They are classified based … Read morePower Transformer and Distribution Transformer