Electrical Articles

Air blast circuit breaker Air circuit breaker in which high pressure air blast is used for arc extinction between its contacts is known as air blast circuit breaker. Working principle of air blast circuit breaker In the air blast circuit breaker compressed air is stored in a tank. When a fault occurs, tripping impulse is […]

Switchgear The demand of electrical energy is increasing day by day. It has become so essential in everyday life that it is now almost important as air and water. A few hours without power is difficult to survive. Therefore, it is desirable to protect power system from harm during faulty condition and to ensure maximum […]

Resistor What is a Resistor? A resistor is an electrical device which has a property to oppose the flow of electric current through it. Most of the time resistor is used in electrical and electronic circuits to limit the current. It is widely used element in electrical and electronic circuit. How does a resistor work? […]

Arc phenomenon When the contacts of a circuit breaker are separated, there is a luminous electric discharge between these two contacts known as ‘Arc’. This arc may continue until the discharge ceases. The production of arc may delay the current interruption process and generate emormous heat which may cause serious damage to system or to […]

Introduction In earlier days, switches and fuses were placed in series to control (ON or OFF) the various circuits under both normal and abnormal (faulty) conditions. But the problem arises when fuse blows out it takes a considerable time to replace it and also not able to operate successfully under high voltage or have faults. […]

Electrical Substation, How does it work? The electrical power system is AC i.e. Electrical power is generated, transmitted and distributed in the form of alternating current. Substations serves as source of energy supply for area of distribution in which these are located. The main functions are to receive energy transmitted at high voltage from the […]