Starting Methods for Synchronous Motor
Synchronous motors are not self-starting. Some additional devices should be used to start the motor. Basically, there are two methods … Continue Reading
Electrical Machines
Need of a Starter (3 & 4 Point) in DC Motors
We use 3 and 4 point starters in DC motors. What happens if a DC motor is started without a … Continue Reading
Current Transformer (CT) – Construction and Working Principle
A current transformer (CT) is a type of transformer that is used to measure AC current. It produces an alternating current … Continue Reading
Practical Transformer on No Load
Please read Ideal Transformer and Practical Transformer before continuing. Consider a practical transformer on no load i.e., secondary on open-circuit as … Continue Reading
Why Current Transformer (CT) Seconday Should not be Open ?
Amazed why secondary of current transformer should not be open? If it is left open it may destroy the current … Continue Reading
Ideal Transformer and Practical Transformer
Ideal Transformer An ideal transformer is one that has no winding resistance no leakage flux i.e., the same flux links … Continue Reading
Properties of Good Transformer Oil
Even though the basic functions of the oil used in transformers are heat conduction and electrical insulation, there are many other properties which … Continue Reading
Percentage Impedance of Transformer and Its Calculation
The percentage impedance of a transformer is marked on most nameplates – but what is it and what does the Z% figure … Continue Reading
What are Motor Control Centres?
The Motor Control Centre is used in general to describe combinations of enclosures, busbars, circuit breakers, power contactors, power fuses, … Continue Reading
Types of Gas Turbine Engines
For an individual generator that is rated above 1000 kW, and is to be used in the oil industry, it … Continue Reading