Short Circuit Reasons and effects

Short Circuit – Causes and Effects

What is Short Circuit? Whenever a fault occurs on a network such that a large current flows in one or more phases, a short circuit is said to have occurred. A

Sag in Transmission lines

Sag in Overhead Transmission Lines

The difference in level between points of supports and the lowest point on the conductor is called sag in overhead transmission lines. Sag in Hot and Cold Day While erecting

corona effect in power system

Corona Effect in Power System

What is Corona? The phenomenon of violet glow, hissing noise and production of ozone gas in an overhead transmission line is known as the corona. In this article, we will study


Function of Protective Relays in Power System

We usually think of an electric power system in terms of its more impressive parts – the big generating stations, transformers, high-voltage lines, etc. While these are some of the basic elements,

Gas turbine power plant

Introduction to Gas Turbine Power Plant

The gas turbine power plant obtains its power by utilizing the energy of burnt gases and air, which is at high temperature and pressure by expanding through several rings of


Air Break Switch – Types and Uses

An “air break switch’ is a switchgear device that uses air as the dielectric. Air Break Switches (ABS) are widely installed throughout distribution networks for use as both isolation or

Tulip contacts of Vacuum Circuit Breaker

Basic Types of Switchgear Components

Before learning about different switchgear components, let us understand what is switchgear. The apparatus used for switching, controlling and protecting the electrical circuits and equipment is known as switchgear. Switchgears are

Breaker failure relay

Breaker Failure Relay (Back-up Protection Relay)

Each year as line and system loading increase and more operating companies superimpose higher voltage transmission systems on existing facilities, the need for high-speed fault clearing, particularly in the face

effects of armature reaction in alternator

Armature Reaction in Alternator

Armature reaction in alternator is the effect of armature flux on the field flux (i. e., rotor ampere-turns). Read this article to learn more. We have already discussed the effect

why transformers are rated in kva

Why Transformers are Rated in kVA, Not in kW?

Transformer rating is expressed in kVA, not in kW.  Rating of a transformer or any other electrical machine reflects its load carrying capability without overheating. Temperature rise (a major threat to insulation) arises due

electrical substation - design criteria

Substation Design Criteria and Studies

The most appropriate type of substation depends on such factors as voltage level, load capacity, environmental considerations, site space limitations, and transmission line right of way requirements. The design criteria

Circuit Breaker Ratings

The rating of circuit breaker is given according to the duties that are performed by it. For complete specifications, standard rating and various tests of switches and circuit breakers IS