Essential Qualities of Protection in Power System

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

Zones of Protection in Power System

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

Difference between Relay and Contactor

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

Difference between Relay and Circuit breaker

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

What is Electrical Fault? Types, Causes & Effects

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

What is Power System Protection? (Need, Function and Components)

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

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