electrical topic

Importance of transformer bushing/polarity

1. Transformer Bushings In electric power, a bushing is a hollow electrical insulator that allows an electrical conductor to pass safely through a conducting barrier such as the case of a transformer or circuit breaker without making electrical contact with it. The two most typical kinds of bushings used on transformers as main lead entrances square measure solid ceramic ware bushings on smaller transformers and …

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Autotransformers

1. Autotransformers It is attainable to get electrical device action by suggests that of one coil, provided that there’s a “tap connection” somewhere on the winding. Transformers having only 1 winding area unit known as autotransformers, shown schematically in figure. An autotransformer has the standard core however only 1 winding, that is common to each the first and secondary circuits. The primary is usually the portion of the winding connected to the AC power supply. This transformer could also be wont to step voltage up or down. …

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Transformer action and principal

1.1. principal of operation Transformer operate relies on the principle that electricity is transferred expeditiously by magnetic induction from one circuit to another circuit. One winding of a electrical device is energized from electricity (AC) supply, alternating force field is established within the electrical device core. Alternating magnetic lines of force, referred to as “flux” …

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SYNCHRONIZING

1. General Today are discussed the principles of synchronizing, Today are discussed the principles of synchronizing, accomplishing it. In theory, there are a minimum of two simple measurements or indications, which may be used for synchronizing a generator to a grid. When two voltages satisfy the conditions of being equal in magnitude, have an equivalent frequency and an angle of zero …

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Transmission Line Protection Principles:

1.Transmission line: Transmission lines are a vital part of the electrical distribution system, as they provide the path to transfer power between generation and load. Transmission lines operate at voltage levels from 69kV to 765kV, and are ideally tightly interconnected for reliable operation. Transmission protection systems are designed to identify the location of faults and …

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DC Machines, troubleshooting and maintenance

1. DC Machine DC machine Conversions of one form of energy into another enables us to use natural power sources as well as manufactured power sources to produce our electrical power supply. Although electricity can be produced by friction, pressure, heat, light, chemical action and magnetism, the most common method used by large power producers …

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ELECTRICAL HAZARDS

1. PRIMARY HAZARDS: Electrical shock Burns-    (i) Joules burns        (ii)Flash over burns Fire and explosions-spark, static electricity 1.1. SECONDARY HAZARDS: Persons falling from height Dropping of tools and objects 1.2. SIDE RULE:             While working on any electrical equipment Switch off Isolate Discharge any static charges Earth the equipment for further safety 1.3. ELECTRICAL …

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ELECTRICAL TERMS

1. General Electrical line is defined resistance inductance and capacitance. Three terms are like brahma Vishnu and Mahesh.             We are discuss about some electrical term most importance. Without electrical field are not possible. Lest see…….importance term are discuss. 1.1 Current (I, Amps) Current (as the name implies) is the movement or flow of electrons …

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