Mike Krzyzewski is really a famous coach of Dream Team. She has coached north america men's basketball team for some time, that's clinched numerous medals for his country. Following Londonfl jerseys supplyn Olympic was over, Krzyzewski told The Associated Press that this game will be his final one as national coach, a job he's held for seven years. He had left open the possibility of swomen nfl jerseystaying with the team beyond the London Games, when practice on Saturday said these will be his last Olympics.When asked if he was sure, Krzyzewski didn't hesitate before again saying, "yecheap nfl jerseys wholesales," this will be his last game "If we could win it, then it might be three major championships in a row, i always do not know when that has been done because we haven't usually won http://govoriotkrito.bg/libs/nflcn08.htmthe globe championships," Krzyzewski said. "It becomes an enormous thing for the program." Whatever, he's an awesome coach. His achievement are going to be remembered by the country.cheap nfl jerseys
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    高壓互感器作用

    2014/1/10 9:15:26      點擊:
     高壓互感器 的作用有以下幾方面:
    將一次回路的高電壓和大電流變?yōu)槎位芈返臉藴饰唬ǔn~定二次電壓為100V,額定二次電流為5A,使測址儀表和保護裝置標準化,以及二次設(shè)備的絕緣水平可按低電壓設(shè)計,從而結(jié)構(gòu)輕巧,價格便宜。
    所有二次設(shè)備可用低電壓、小電流的控制電纜連接,使屏內(nèi)布線簡一單、安裝方便。同時,便于集中竹理,可實現(xiàn)遠方控制和測量。
    二次回路不受一次回路的限制.可采用Y形、△形或V形接法,因而接線靈活方便。同時,對二次設(shè)備進行維護、調(diào)換以及調(diào)整試驗時,不需中斷一次系統(tǒng)的運行,僅適當?shù)馗淖兌谓泳即可實現(xiàn)。
    使二次設(shè)備和工作人員與高電壓部分隔離,且互感器二次側(cè)均接地,從而保證了設(shè)備和人身的安全。
    在交流電路中,常用互感器把高電壓轉(zhuǎn)換成低電壓,大電流轉(zhuǎn)換成小電流,此后再供測量、控制、保護用。這樣不但可以加大測量儀表從程,便于儀表標準化,降低控制、保護設(shè)備的電壓和電流,而且使儀表與設(shè)備或高壓電路隔開,保證儀表、設(shè)備和工作人員的安全
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