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Showing posts from December, 2012

Transformer

A transformer is an electrical device that takes electricity of one voltage and changes it into another voltage. Types of transformer: Ø   Step up Ø   Step down Ø   Isolating Ø   Variable etc. In Ashuganj power station, step up transformers are used to up the voltage and minimize transmission loss. Step up transformer:             The transformer in which voltage is increased is called step up transformer. Here the secondary has more turns than the primary winding.                                                                                       Fi...

Basic Electrical Equipments

Generator: In electricity generation, an electric generator is a device that converts mechanical energy to electrical energy. The source of mechanical energy may be a reciprocating or turbine steam engine, water falling through a turbine or waterwheel, an internal combustion engine, a wind turbine, a hand crank, compressed air or any other source of mechanical energy.                                                                                   Figure: Electric generator.             Working principle: Electromagnetic induction is the production of voltage across a conductor moving thro...

Thermal insulation

The pipe carrying the fluids at a high temperature should be properly insulated to avoid heat loss to the surroundings. The insulation material should have low co-efficient of thermal conductivity. It should not damage the pipe material and should be able to resist the temperature to which it is subjected. Generally “Rock wool” is used for thermal insulation inpower plant.                                                                                      Figure: Rock wool Lath Lord. Use of insulation: Serial No:               ...