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
Transformer Oil Filtration and Hot Oil Circulation Process
Transformer Oil Filtration Plant is a self-contained unit to upgrade the quantity of oil. The duty cycle begins from pumping … Continue Reading
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