Amazed why secondary of current transformer should not be open? If it is left open it may destroy the current transformer. So it is very important that the secondary of …
Ideal Transformer An ideal transformer is one that has no winding resistance no leakage flux i.e., the same flux links both the windings no iron losses (i.e., eddy current and …
Even though the basic functions of the oil used in transformers are heat conduction and electrical insulation, there are many other properties which make a particular oil eminently suitable. Properties of good transformer …
The percentage impedance of a transformer is marked on most nameplates – but what is it and what does the Z% figure mean? The impedance of a transformer is the total opposition …
The Motor Control Centre is used in general to describe combinations of enclosures, busbars, circuit breakers, power contactors, power fuses, protective relays, controls and indicating devices. Read more about switchgear …
For an individual generator that is rated above 1000 kW, and is to be used in the oil industry, it is usual practice to use a gas turbine as the …
An induction motor may be considered to be a transformer with a rotating short-circuited secondary. The stator winding corresponds to the transformer primary and the rotor winding to the transformer …
Electric cars are making big waves in the automobile world. These noise-free, pollution-free and high-performance vehicles are expected to make their I.C. engine counterparts obsolete by 2025. This video will …
In this post, we will look at the voltage and power equation of a dc motor and the condition for maximum power in a dc motor. Voltage Equation of a DC Motor …
This set of DC Generator Problems with Solution focuses on problems based on Types of DC Generator. DC Generator Problem 1 A shunt generator delivers 450 A at 230 V …
Gas-insulated substations (GIS) have been used in power systems over the last three decades because of their high reliability, easy maintenance, small ground space requirement, etc. This article is an …
This set of Electrical Machines Multiple Choice Questions & Answers (MCQs) focuses on “Synchronous Motors ”. This is a set of Synchronous Motors MCQ with detailed solution. Synchronous Motor MCQ …
Depending on the type of construction used, the transformers are classified into two categories. Core type Transformer Shell type Transformer Difference between Power Transformer and Distribution Transformer Core Type Transformer In …
How does a robotic arm in a production plant repeat exactly the same movements over and over again? How can you move an automatic milling machine so precisely? It is …
Star-Delta starting is frequently referred to as “Soft-starting” a motor. But what is soft about his starting method? Why is it used? What are the advantages? What are the disadvantages? In …