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 London 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 staying 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, "yes," 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 the 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.

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上海人民電器廠斷路器的工作原理

2021/1/19 14:41:23      點擊:

斷路器的工作原理(li)

    斷路器內(nei)部一般(ban)由觸頭系統(tong)(tong)、滅弧系統(tong)(tong)、操作機構、脫扣器、外殼(ke)等構成,其作用(yong)是(shi)切斷和(he)接通(tong)負荷,以(yi)及切斷故(gu)障電路,防止事故(gu)擴大,保證安(an)全運行。因此,斷路器的工作原理(li)是這(zhe)樣(yang)的:

斷路器的工作原理圖

    1、當短路時(shi),大電流(一般10至12倍(bei))產生的磁(ci)場克(ke)服反力彈(dan)簧,脫扣器拉動操作(zuo)機(ji)構動作(zuo),瞬(shun)時跳閘。

    2、當過載(zai)時,電(dian)(dian)流(liu)變大(da),發熱量(liang)加劇,雙(shuang)金(jin)屬片變形到一(yi)定程度推(tui)動(dong)機構動(dong)作(zuo),從而(er)使得開(kai)關(guan)跳閘(zha);電(dian)(dian)流(liu)越(yue)大(da),動(dong)作(zuo)時間越(yue)短。

    3、有型的(de),使用互(hu)感器采集各相電流(liu)大小,與設(she)定(ding)值比(bi)較,當電流(liu)異常時微處理器發出信號(hao),使電子(zi)脫扣器帶動(dong)操作機構動(dong)作。