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
<th id="dd0kx"></th>
<rp id="dd0kx"><acronym id="dd0kx"><blockquote id="dd0kx"></blockquote></acronym></rp>
<em id="dd0kx"></em><em id="dd0kx"><tr id="dd0kx"></tr></em>

<button id="dd0kx"><acronym id="dd0kx"></acronym></button>

    1. <tbody id="dd0kx"></tbody>
      <span id="dd0kx"></span>

      <em id="dd0kx"><tr id="dd0kx"></tr></em>
      你的位置:首頁 > 新聞動態 > 技術動態

      永磁機構的特點以及應用

      2013/11/19 10:52:44      點擊:
       永磁操動機構主要由永久磁鐵和分、合閘控制線圈等部分組成,是用永磁體去實現真空斷路器合閘保持和分閘保持的一種新型的電磁操動機構,目前永磁操動機構的永磁普遍采用釹硼稀土材料制成,釹鐵硼永磁體在收到強烈機械沖擊、高溫和反向磁場作用時均可能部分或全部退磁。當溫度高于120攝氏度時,釹鐵硼的磁性才會下降,但是一般情況下操動機構不會出現這樣高的溫度,永磁操動機構中的機械沖擊對釹鐵硼永磁體來說是可以承受的,所以永磁體的退磁問題,并不影響它在永磁操動機構中 實際應用。

      永磁操動機構特點

      1、通過雙線圈分別控制分、合閘操作,及合閘線圈只控制合閘操作,分閘線圈只控制分閘操作,提高機構的可靠性;

      2、采用全新的磁路設計,增大了分、合閘的保持力,減小分、合閘時對線圈電流的要求,降低了能耗;

      3、機構的下部幾座設計有聯動軸,可保證分合閘操作時三相同期性,控制了首開相燃弧時間(1ms內);

      4、機構的機械壽命可高達10萬次,與傳統的電磁機構和彈簧機構相比,機械壽命至少提高了3倍以上;

      5、機構是通過動鐵心與主軸傳動拐臂相連直接驅動動觸頭的,簡化了傳動鏈,無需機械脫、鎖扣裝置,減少了故障源等

           廈門施耐德寶光電氣有限公司正是利用了永磁操動機構的這些特性,制造出來了ZN73-12戶內永磁真空斷路器和ZW32-12戶外真空斷路器,這兩者都是為額定電壓12KV,三相交流50HZ的配電設備,不同的是ZN73-12作為電網設備、工礦企業動力設備的保護和控制單元。由于斷路器采用專利產品CDY型永磁機構與直接傳動結構設計,使其具有優異的性能,特別適用于頻繁操作,或多次開斷短路電流的場所;而ZW32-12主要用于開斷、關合電力系統中的負荷電流、過載電流及短路電流。適用于變電站及工企業配電系統中作保護和控制之用,及農村電網頻繁操作的場所,其具有體積小、重量輕、防凝露、免維護等特點,能適應較惡劣的氣候條件。

      日本中文字幕不卡无码视频
      <th id="dd0kx"></th>
      <rp id="dd0kx"><acronym id="dd0kx"><blockquote id="dd0kx"></blockquote></acronym></rp>
      <em id="dd0kx"></em><em id="dd0kx"><tr id="dd0kx"></tr></em>

      <button id="dd0kx"><acronym id="dd0kx"></acronym></button>

        1. <tbody id="dd0kx"></tbody>
          <span id="dd0kx"></span>

          <em id="dd0kx"><tr id="dd0kx"></tr></em>