Switchgear Made by Evgeny A Dmitriev 9 a

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Switchgear Made by: Evgeny A. Dmitriev 9 a 96 group. Supervised by : Ekaterina S. Tarasova. Tomsk 2013.

Contens 1) 2) 3) 4) 5) 6) Function History Types Scope The countries manufactures The conclusion 1

Function In an electric power system, Switchgear is the combination of electrical disconnect switches, fuses or circuit breakers used to control, protect and isolate electrical equipment. 2

History Switchgears are as old as the electricity generation. The first models were very primitive: all components were simply fixed to wall. Later they were mounted on wooden panels. For reasons of fire protection, the wood was replaced by slate or marble. 3

Types (1) Kind of an electric circuit: a) Switching centers with one system of bus. b) Switching centers with two system of bus. c) Systems of bus 4

Types (2) Substances: 1) 2) 3) 4) Gas – simple construction. Oil – evaporation is used. Vacuum – small interval of a gap. Air – the arch vanishes by the distance. 5

Scope Switching centers are applied in electric circuit, in sites where formation of an electric arch is possible. 6

The countries manufactures Germany – is leader in manufacture and working out of switching centers. Now there compact highvoltage switching centers are invented. 7

The conclusion If switchgear isn’t used in electric power system, electric circuit would break very fast, by the shot current circuit. 8

List of bibliographies 1) “Handbook of switchgears” 2007. D. N. Vishwakarma 2) “Power System Analysis And Design Types” 2000. Bruce F. Wollenberg. 3) ”Power Generation, Operation, and Control” 2011. Allen J. Wood. 9

Thanks for attention 9

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