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
<td id="gu7nx"><input id="gu7nx"></input></td>
<form id="gu7nx"><optgroup id="gu7nx"></optgroup></form>

    1. <style id="gu7nx"><kbd id="gu7nx"></kbd></style>

    交流接觸器節(jié)能技術(shù)

    2014/1/2 8:35:18      點(diǎn)擊:
    交流接觸器 廣泛應(yīng)用于低壓電路中,是一種使用安全、控制方便、量大而面廣的工業(yè)必需品。我國(guó)現(xiàn)在普遍使用的額定電流在63A及以上的大、中容量交流接觸器應(yīng)以上億臺(tái)計(jì),其操作電磁系統(tǒng)在吸持時(shí)消耗的有功功率在10W~100W之間;消耗的無功功率則在數(shù)十乏爾至數(shù)百乏爾之間。所耗有功功率的分配大致為:鐵芯65%~75%、短路環(huán)25%~30%、線圈3%~5%。對(duì)于我國(guó)這樣一個(gè)正處于工業(yè)化、城市化進(jìn)程加快的交流接觸器使用大國(guó),且能源需求日趨緊張,節(jié)約電力資源已成為當(dāng)務(wù)之急。
    如對(duì)上述交流接觸器的操作電磁系統(tǒng)采用相應(yīng)的節(jié)電技術(shù),將其操作電磁系統(tǒng)由原設(shè)計(jì)的交流吸持改為直流吸持,可以節(jié)省鐵芯和短路環(huán)中絕大部分的損耗功率,從而取得較高的節(jié)電效率(一般有功節(jié)電率>90%以上)。不僅如此,通過改造還可降低或消除噪音,降低線圈溫升并延長(zhǎng)接觸器的使用壽命。
    節(jié)電標(biāo)準(zhǔn)

    為了適應(yīng)能源結(jié)構(gòu)調(diào)整需要,我國(guó)在原有GB 8871-----1998《交流接觸器節(jié)電及其應(yīng)用技術(shù)條件》基礎(chǔ)上,對(duì)標(biāo)準(zhǔn)重新進(jìn)行了修訂,并頒布GB 8871---2001《交流接觸器節(jié)電器》。在新標(biāo)準(zhǔn)中,對(duì)噪聲及噪聲試驗(yàn)、節(jié)電率及節(jié)電率的測(cè)量、電磁兼容EMC及試驗(yàn)條款都列入強(qiáng)制執(zhí)行條款,這無疑對(duì)交流接觸器節(jié)能技術(shù)的研究推廣起到積極作用。
    亚洲色欲大片AAA无码,欧美精品一区三区在线观看,久久精品人人做人人爽不卡,国产日韩伦精无码一区二区
    <td id="gu7nx"><input id="gu7nx"></input></td>
    <form id="gu7nx"><optgroup id="gu7nx"></optgroup></form>

    1. <style id="gu7nx"><kbd id="gu7nx"></kbd></style>