A protection system that isolates a faulty component must possess certain qualities in order to function properly. These qualities are Selectivity or Discrimination Sensitivity Reliability Stability Fast operation Essential Qualities of Protection Let us understand each quality in detail. 1. Selectivity or Discrimination The selectivity or discrimination of a protective relay refers to how well … Read more
In the previous article on “zones of protection in power system“, we see that in order to ensure the safety of the power system, it is divided into different zones. For each zone, there is an appropriate protective scheme. In this article, we will learn about two types of protection in a power system i.e. … Read more
A power system deals with generation, transmission, and distribution of electrical power. Transformers, generators, bus bars, transmission & distribution lines, circuit breakers, etc. are the elements or equipment of a power system. Each element or equipment of the power system has its own protective scheme. For example, transformer protection, generator protection, bus bar protection, transmission … Read more
Modern life comes with a wide range of electrical gadgets that make our life easier. But with more and more devices invading our homes, we must make ourselves aware of the safe use of electrical appliances. There can be various electrical safety concerns in an average household; one of the most serious – is a … Read more
There is a lot of confusions and misinterpretations regarding the difference between relay and contactor around the industry as they are two closely related terms. Many times these two terms are used nearly interchangeably. Both of them are electrically operated switches and mainly used for control and switching of loads. Although the basic principle of … Read more
Relays and circuit breakers are two commonly used terms of a power system. The study of the protection in power systems is incomplete without the study of relays and circuit breakers. The uses of relays and circuit breakers are found in industrial as well as in commercial applications. There are many differences between a relay … Read more
Arc chute is a set of parallel arranged metal plates which extinguishes the arc formed when the circuit breaker interrupts the high electric current. It is also known by other names such as arc dividers or arc splitters. It is an important component of the circuit breaker. These metal plates have an equal air gap … Read more
A high voltage detector is a device which detects the presence of high voltage without any physical contact with the conductor. It is used to determine whether the conductor is energized or de-energized so that it can be earthed before starting maintenance work. Hence it gives information to the operator whether it is safe to … Read more
An electrical fault is a condition which can cause equipment failures (in transformers, transmission lines, alternators, busbars, etc.) and disturbs the normal working of the system. The faults can also lead to the death of humans, birds, and animals along with equipment failure and electric power supply interruption. Power system protection deals with the protection … Read more
Power system protection is a branch of electrical engineering that deals with the protection of electrical equipment (or component) in a power system network by removing the faulty part. or Power system protection deals with protecting electrical power systems from faults by disconnecting faulty components from the rest of the network. Power system protection is … Read more