A current transformer is an instrument transformer in which the current ratio is within the specified limit. The primary winding … Read moreCurrent Transformers – Windings and Rated Insulation Levels

The dc generators and dc motors have the same general construction. In fact, when the machine is being assembled, the … Read moreConstruction of DC Machine (Generator & Motor)

The most appropriate type of substation depends on such factors as voltage level, load capacity, environmental considerations, site space limitations, … Read moreSubstation Design Criteria and Studies

The rating of circuit breaker is given according to the duties that are performed by it. For complete specifications, standard … Read moreCircuit Breaker Ratings

A lightning arrester is connected to protect a piece of equipment from lightning and switching surges. Overvoltages may cause the … Read moreLightning Arrester – Location, Rating and Selection

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

What is Transformer Oil? Transformer oil is mineral insulating oil derived from crude petroleum. It is a mixture of various … Read moreTransformer Oil – Tests and Purification Methods

Condition monitoring for transformers is the process of monitoring a parameter of conditions in transformer (moisture, temperature, etc.), in order … Read moreCondition Monitoring for Transformers

  Part 1Part 2Part 3Part 4Part 5 16. Out of the following circuit breakers, which one has the lowest voltage … Read moreCircuit Breakers – Objective Questions – Part 2