Transformer Oil – Tests and Purification Methods
What is Transformer Oil? Transformer oil is mineral insulating oil derived from crude petroleum. It is a mixture of various … Continue Reading
Condition Monitoring for Transformers
Condition monitoring for transformers is the process of monitoring a parameter of conditions in transformer (moisture, temperature, etc.), in order … Continue Reading
Circuit Breakers – Objective Questions – Part 2
Part 1Part 2Part 3Part 4Part 5 16. Out of the following circuit breakers, which one has the lowest voltage … Continue Reading
Air Blast Circuit Breaker – Construction, Working and Types
Air blast circuit breaker employs a high-pressure air blast as an arc quenching medium. The construction and working of different … Continue Reading
Different Types of Circuit Breakers
A circuit breaker is a switching device which can be operated manually as well as automatically for controlling and protection … Continue Reading
Methods of Arc Extinction in Circuit Breaker
The selection of an appropriate arc extinction method depends on several factors, including the voltage level of the circuit, the … Continue Reading
4 Major Troubles in a DC Motor with Reasons
DC motor fault zone analysis is a vital plan of any DC motor maintenance program. Several troubles may arise in a … Continue Reading
Objective Questions on Electric Traction – 1
1. Overall efficiency of steam locomotive system is close to (A) 5 to 10%(B) 25 to 30%(C) 55 to 60%(D) … Continue Reading
Substation Earthing System ( Grounding System ) – Earthing Mat
The substation earthing system comprises of a grid (earth mat) formed by a horizontal buried conductors. Read about design of substation … Continue Reading
Losses in DC Machine ( DC Generator and Motor )
The losses in a DC machine (generator or motor) may be divided into three classes viz Copper losses Iron or … Continue Reading