Circuit Breakers

Differential Protection of Generator & Alternator

The most common schemes employed for the protection of a three-phase generator stator windings from earth faults phase-to-phase faults make use of circulating current principle. In these protection schemes, currents at the two ends of the protected section are compared. Under normal conditions, these currents are equal became different on the occurrence of a fault in […]

Lightning Arrester Types & Working

Hi friends, in this article, I am going to discuss the lightning arrester types and lightning arrester working principle. You will find this article very interesting and informative, I hope so. The lightning arresters are used to protect the power system from high voltage surges. An arrester does not absorb lightning or stop lightning. It

ACB | Air Circuit Breaker Working Principle

In an air circuit breaker, we use the air as an arc quenching medium. The air has several advantages over oil as an arc extinguishing medium. These are as follows: Air Circuit Breaker Working Principle In the air circuit breakers, we extinguish the arc by increasing its resistance. We lengthen the arc with the help

VCB | Vacuum Circuit Breaker Working Principle

Hi friends, In this article, I am explaining the vacuum circuit breaker working principle and construction, and hoping you would like my article. The high vacuum has a high dielectric strength, and the current interruption in the high vacuum occurs at the first current zero. These two properties of high vacuum make the vacuum circuit

SF6 Circuit Breaker Working Principle

Hi friends, in this article, I am explaining the SF6 circuit breaker working principle and construction. This article will increase your knowledge; I hope so. In the oil circuit breakers, air circuit breakers and low oil circuit breakers, arc extinction take place slowly after the moment of contact separation. Hence, the arc is usually extinguished

Circuit Breaker Working Principle & Operation

Hi Friends, In this article, I am going to discuss the circuit breaker working principle and hope you will find it interesting and useful. Circuit breakers are mechanical devices designed to make and break the electrical circuits under normal and abnormal conditions. Automatic circuit breakers, which are generally used for the protection of electrical circuits,

MOCB | Minimum Oil Circuit Breaker

As in the case of plain oil circuit breaker described earlier, the quantity of oil required reaches very high figures with the increase in system voltage. This vast quantity of oil increases the size of the breaker and maintenance problems. We know that the oil in the circuit breaker performs two functions. Firstly, it acts

Oil Circuit Breaker Working Principle

In an oil circuit breaker or OCB, the separating contacts of the breaker are made to separate within an insulating oil because insulating oil has better insulating properties than air. Oil Circuit Breaker Working Principle When a fault occurs, the breaker contacts open in oil, an arc is struck between them. Due to the heat