Permanent Magnet Moving Coil

Permanent Magnet Moving Coil     Principle: These instruments are used either as ammeters or voltmeters and are suitable for d.c work only. PMMCinstruments work on the principle that, when a current carrying conductor is placed in a magnetic field,...

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Errors in Measurement and Classification of Errors

True Value: It is not possible to determine the true of quantity by experiment means. True value may be defined as the average value of an infinite number of measured values when average deviation due to various contributing factor will approach to zero. Measured Value: It may...

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Electrical Switchgear Protection

Definition of Switchgear A switchgear or electrical switchgear is a generic term which includes all the switching devices associated with mainly power system protection. It also includes all devices associated with control, metering and regulating of electrical power system....

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Power Plants and Types of Power Plant

What is Power Plant? A power plant or a power generating station, is basically an industrial location that is utilized for the generation and distribution of electric power in mass scale, usually in the order of several 1000 Watts. These are generally located...

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INDUCTION MOTOR

INDUCTION MOTOR One of the most common electrical motor used in most applications which is known as induction motor. This motor is also called as asynchronous motor because it runs at a speed less than its synchronous speed. Here we need to define what...

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Principle of DC Generator

Working Principle of DC Generator There are two types of generators, one is ac generator and other is DC generator. Whatever may be the types of generators, it always converts mechanical power to electrical power. An AC  generator produces alternating power....

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Working and Operating Principle of DC Motor

Working and Operating Principle of DC Motor A DC motor in simple words is a device that converts electrical energy (direct current system) into mechanical energy. It is of vital importance for the industry today, and is equally important for engineers to look into...

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Transformer

Transformer Definition of Transformer: Electrical power transformer is a static device which transforms electrical energy from one circuit to another without any direct electrical connection and with the help of mutual induction between two windings. It transforms power from...

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Construction of Power Cable

Construction of Power Cable There are various parts of a cable to be taken care of during construction. The power cable mainly consists of: Conductor Insulation LAY for Multicore cables only Bedding Bedding Outer Sheath                                                                  ...

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DC Traction System

DC Traction System The transformation and high voltage generation of dc is very inconvenient to the dc supply used is at normally 600 V and this voltage is almost universal for use in urban and suburban railways. For direct current equipment, the series motor is universally...

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Electrical Drive

Electrical Drive Whenever the term electric motor or electrical generator is used, we tend to think that the speed of rotation of these machines is totally controlled only by the applied voltage and frequency of the source current. But the speed of rotation of an electrical...

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