What is an HVDC (High Voltage Direct Current) Transmission System?
HVDC stands for High Voltage Direct Current. An HVDC electric power transmission system uses direct current for the bulk transmission of … Continue Reading
Power System
4 Major Types of Electrical Substations
The assembly of the apparatus used to change some characteristic (e.g. voltage, a.c. to d.c., frequency, p.f etc.) of … 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
Classification or Types of Protective Relays
The IEEE defines protective relays as: “relays whose function is to detect defective lines or apparatus or other power system conditions … Continue Reading
Voltage Surge in Power System
What is Voltage Surge or Transient Voltage? The sudden rise in voltage for a very short duration on power system … Continue Reading
Why Voltage Control is Important?
In a modern power system, electrical energy from the generating station is delivered to the ultimate consumers through a … 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