What is Earthing Grid or Earthing Mat? Design and Importance

An earthing grid is made up of a number of rods connected together by copper conductors. Earthing grid is also known as the earthing mat. It looks like a mesh of conductors. The purpose of earthing grid is to reduce the overall grounding resistance. It also helps in limiting the potential gradient. It is a … Read more

What is Electrical Earthing? Types, Objectives and Advantages

Electrical Earthing means connecting non-current-carrying parts of electrical equipment or the supply system’s neutral point to the earth so that electrical energy can be discharged immediately and safely. Earthing is accomplished by connecting installation parts to electrical conductors or electrodes buried in the soil. This contacting arrangement is known as the earthing. In this article, … Read more

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

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