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    • 開關電源和變壓器的區別

      首先,開關電源是直流---直流,變壓器是交流---交流;其次,開關電源工作的頻率較高(一般在幾十千赫茲),而變壓器有高頻,也有低頻,開關電源里用到的脈沖變壓器就是高頻變壓器,鐵芯是鐵氧體之類的磁芯,其體積小,效率高(頻率越高效率就越高),說
      發布時間:2018-08-15   點擊次數:36

    • 干式變壓器如何防雷?

      雷擊損壞配變過去單純認為是雷電波進入高壓繞組引起,實際上這種認識帶有程度的片面性。理論分析和實際試驗表明:配變雷害事故的主要原因是由于配電系統遭受雷害時的“正反變換”的過電壓引起,而反變換過電壓損壞事故尤甚。現就正反變換過電壓發展過程進行分
      發布時間:2018-08-11   點擊次數:27

    • 箱式變壓器檢測方法

      如何進行箱式變壓器檢測?電源變壓器檢測有多種方式,可以通過觀察變壓器的外貌來檢查其是否有明顯異常現象,可以用萬用表進行絕緣性測試或線圈通斷的檢測,也可以通過判別初、次級線圈進行檢測等。接下來將具體介紹電源變壓器檢測方法。&nb
      發布時間:2018-08-04   點擊次數:49

    • 中國變壓器組部件四大重大突破

      背景隨著電網建設規模的快速發展,我國在交、直流電網的輸電容量、技術水平和設施裝備的總量和能力上均處于世界前列;同時國產電力裝備的制造能力也得到了快速的提升。競爭激烈的市場經濟對輸變電設備的制造質量、技術性能和運行可靠性等提出了新的、更高的要
      發布時間:2018-07-27   點擊次數:39

    • 節能變壓器不能普及的原因是什么

      目前節能配電變壓器尤其是非晶合金變壓器的價格并不便宜,企業在做變壓器替換的過程中將要一次性投入大量的初始資本,而設備帶來的成本回收期卻太長,因此用戶很難下決心替換。而解決成本和價格居高不下的途徑,則是不斷提升高效配變的產業化能力,包括工藝優
      發布時間:2018-07-18   點擊次數:19

    • 中國變壓器組部件四大重大突破

      背景隨著電網建設規模的快速發展,我國在交、直流電網的輸電容量、技術水平和設施裝備的總量和能力上均處于世界前列;同時國產電力裝備的制造能力也得到了快速的提升。競爭激烈的市場經濟對輸變電設備的制造質量、技術性能和運行可靠性等提出了新的、更高的要
      發布時間:2018-07-12   點擊次數:32

    • 什么是變壓器繼電器的平衡電壓

      對干式變壓器來說,所謂繼電器的平衡電壓,就是維持繼電器不發生動作的電壓值。可以通過在電壓繼電器的電壓傳感電路中設置可調電阻器的方法,達到預先設定平衡電壓的目的。這樣,就可以預先設定電阻器可調范圍的電壓值。干式變壓器通常需要將遠
      發布時間:2018-07-07   點擊次數:19

    • 變壓器局部放電小知識

      局部放電現象,主要指的是高壓電氣設備。電力設備絕緣在足夠強的電場作用下局部范圍內發生的放電。這種放電以僅造成導體間的絕緣局部短(路橋)接而不形成導電通道為限。每一次局部放電對絕緣介質都會有一些影響,輕微的局部放電對電力設備絕緣的影響較小,絕
      發布時間:2018-06-29   點擊次數:34

    • 中國交流/直流測試電源行業蓬勃發展

      中國在過去30年中,中國成為消費電子、汽車電子、及工業設備制造最活躍的市場之一,積累了眾多發展優勢并且創造了一個高度發達的科技生態環境。保障了大量電子元件及設備能更快的供應給各行各業,提高了生產效率及試樣活動。方便了制造商能夠快速的與廠商進
      發布時間:2018-06-23   點擊次數:33

    • 穩壓器廠家如何利用工業產品互聯網化

      互聯網消費和互聯網市場的不斷興起和發展,實用生活消費品同比去年增長了35.21%,占整個社會消費品消費的10%,比重在逐年增加,而工業消費品在互聯網上的消費不足線下消費的1%,互聯網在前五年給生活消費一次飛躍式的發展,而緊跟著的后五年一定會
      發布時間:2018-06-15   點擊次數:27

    • 干式變壓器接線方式

      干式變壓器的過載能力與環境溫度、過載前的負載情況(起始負載)、變壓器的絕緣散熱情況和發熱時間常數等有關,若有需要,可向生產廠索取干變的過負荷曲線。如何利用其過載能力呢?筆者提出兩點供參考:  (1)選擇計算變壓
      發布時間:2018-06-08   點擊次數:31

    • 變壓器的主要參數

      變壓器在規定的使用環境和運行條件下,主要技術數據一般都都標注在變壓器的銘牌上。主要包括:額定容量、額定電壓及其分接、額定頻率、繞組聯結組以及額定性能數據(阻抗電壓、空載電流、空載損耗和負載損耗)和總重。A、額定容量(kVA):額定電壓.額定
      發布時間:2018-05-30   點擊次數:32

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