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Abstract

Electric power industry is very important in country life.Itsupplies motivit y for our industryagriculture science technique.Wehave weath y resource.Power station makes all kinds of source intoelectricsuch as coal water powernuclear energy.

Because it is so important .We should plan it before builting.Itrequires factsaft yadvanced and reasonable.

The paper is divided into seven parts.The first :selecting thetransformer of factory and the main transformer.According to the loadof the factory. I can select the transformer of the factory .Then I canselect the main transformer .The second:selecting the main electricalwiring and the wiring of the factory . I select two buses with bybass

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inthe main wiring .It can enhance the reliabilit y .According to theprinciple of boiler subsection .I select the wiring of factory. The thirdthe count of short circuit current .The count of short circuit currentinclude the s yinmetry of three-phase and uns ymmetry. I select themethod of operation curve .The fouth : selecting the equipment .I selectbreaker insulatorcurrent transformervoltage transformer and selectingthe bus . I use the soft line in the bus of 220KV. Form the high-voltagetransformer and the voltage transformer and the lightning arrest .Iselect the sealed bus.The fifth :selecting the distribution install. Ichoose divided-phase middle install in the high-voltage distributioninstall. The sisth:the design of avoiding thunderbolt .I choose eightneedles using the protection The seventh: the protection of the relay ..

Key words :breaker ,transformer ,bus .

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