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
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
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
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
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
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
Constant Current Driver Design based on LM317
Using a resistor to limit the current can be used for small LEDs. For such low power LEDs, where the … Continue Reading