Deepakkumar Yadav
Function of Wattmeter We have to measure electric power to know how much power any device or apparatus is drawing from the line. A wattmeter registers watts or kilowatts, and by reading it one can tell how much power any piece of apparatus is consuming. The amount of electric power delivered by a circuit depends on … Read more
Classification of amplifiers An amplifier is an electronic circuit which is used to amplify or increase the level of weak input signals into very high output signals. Transistors are used as amplifiers in most circuits. In addition, resistors, capacitors and a biasing battery are required to form complete amplifier circuits. Almost all electronic systems work … Read more
Introduction and Definition of Extra High Voltage During the past decades the demand of electricity has been increasing at a tremendous rate throughout the world. which has also results into increasing generation and transmission capacity of electrical energy. This increasing need of transmitting greater and greater amounts of power has led to a continuous increase … Read more
Comparison of Core Type and Shell Type Transformer Q. Difference between core type and shell type transformer. Sr. No. Core Type Shell Type 1. Figure (A) In this type, the windings enclose the whole core. Figure (B) In this type, the core encloses the windings. 2. Average length of the core is more. Average length … Read more
Constructional Details of Transformer (Single Phase) The transformer has two windings primary and secondary. These windings are made of enamelled copper. These windings are suitably put on the limbs of the transformer core. A suitable insulation is used for the former on which the windings are put. The transformer core is made of silicon steel … Read more
Oil Level Indicators in Transformer After 1 month of service, and every 3 to 5 years, check the tank oil level indicators. These are float operated, with the float mechanism magnetically coupled through the tank wall to the dial indicator. As level increases, the float rotates a magnet inside the tank. Outside the tank, another … Read more
Air Preheater in Thermal Power Plant As the entire heat of the flue gases cannot be extracted through the economizers, air preheaters are used to recover some of the heat from these gases. On an average increase of 20°C in the air temperature results in an increase in the boiler efficiency by 1%. The use … Read more
Economizer The economizer is used to heat feed water so as to recover a part of heat which would otherwise be lost through flue gases. It is connected in the passage of the flue gases in between the exit from the boiler and enter to the chimney. By its use, economical use of fuel is … Read more
Boiler The boilers used can be classified according to contents of tubular heating surface i.e. gas or water and accordingly are called as fire tube boilers and water tube boilers. 1. Fire tube boilers It consists of tubes through which hot gases are passed and the water surrounds these tubes. It essentially consists of a … Read more
Need of Energy Conservation Everyday we flip switches, work in busy factories using energy at a rate which is growing day by day. Energy is playing an important role. It is the central force behind our productivity, our leisure and our environment. There is a strong correlation between energy use per capita and standard of … Read more