Bundled conductors are commonly used to increase electrical capacity and reduce corona and radio noise at voltages above 200 kV. Though the extent of corona and radio noise is impacted by elevation (air density), and other factors such as … Continue Reading about Bundled Conductors
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Types of Underground Cables
In practice, different types of underground cables are generally required to deliver 3-phase power. For the purpose, either three-core cable or three single core cables may be used. For voltages upto 66 kV, 3-core underground cable (i.e., multi-core construction) is preferred due to economic … Continue Reading about Types of Underground Cables
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Measurement of Three Phase Power | Wattmeter Methods
This article explains the measurement of three-phase power in star connected or delta connecter load using the wattmeter methods. The power in … Continue Reading about Measurement of Three Phase Power | Wattmeter Methods
What is Circuit Breaker – Working Principle and Arcing Phenomenon
What is a Circuit Breaker? As the name indicates, circuit breaker means the device which breaks (Open) the circuit under the abnormal condition and … Continue Reading about What is Circuit Breaker – Working Principle and Arcing Phenomenon
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 electrical … Continue Reading about What is an HVDC (High Voltage Direct Current) Transmission 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 electric supply is called a … Continue Reading about 4 Major Types of Electrical Substations
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 for … Continue Reading about Starting Methods for Synchronous Motor
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 starter? Let's check it. Consider a dc motor at … Continue Reading about Need of a Starter (3 & 4 Point) in DC Motors
Current Transformer (CT) – Construction and Working Principle
The large alternating currents which can not be sensed or passed through normal ammeter, and current coils of wattmeters, energy meters can easily be … Continue Reading about Current Transformer (CT) – Construction and Working Principle
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 of an … Continue Reading about Classification or Types of Protective Relays