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href="http://www.520peixun.com/products/category-238/"><strong>貼片保險絲</strong></a>的額定電流應降低25％。傳統保險絲對環境溫度的變化非常敏感大多數傳統<a href="http://www.520peixun.com"><strong>保險絲</strong></a>使用熔化溫度較低的材料。例如，不能在25℃的環境溫度下以大于7.5A的電流工作的額定電流為10A的<strong>貼片保險絲</strong>。</span></span></span> <div style="text-align: center;"><img src="/u_file/2204/photo/2204/2022042117590899.jpeg" /></div> <span style="line-height:200%;"><span style="font-size:15px;"><span style="font-family:微軟雅黑,arial;"> 額定電壓是一般標準額定電壓系列為32V和125V和250V和600V的<strong>貼片保險絲</strong>的額定電壓必須等于或大于有效電路電壓的額定電壓。<br /> 整個電路中不是很重要的就是保險絲的電阻。在低壓電路中使用保險絲時應考慮此問題對于小于1安培的保險絲和電阻將為數歐姆。大多數保險絲是由正溫度系數材料制成的，因此它們也可以分為耐寒性和耐熱性。<br /> 環境溫度：保險絲的載流量。實驗在環境溫度為25℃時進行，受環境溫度變化的影響。保險絲的載流量越低和環境溫度越高導致保險絲的工作溫度越高。壽命越短。然而相反的是允許在較低溫度下使用將延長保險絲的壽命。<br /> 額定熔斷能力：也稱斷開能力。額定熔斷能力是指保險絲在額定電壓下確實能夠熔斷的最大允許電流。如果發生短路，熔斷器將通過多次大于正常工作電流的瞬時過載電流。在安全操作期間，要求保險絲保持完整狀態（無爆裂或斷裂）。<br /> 保險絲性能：保險絲的性能是指保險絲對各種電流負載的反應速度。熔斷器通常根據其性能分為四種類型：正常響應、延遲斷開、快速動作和限流。<br /> 通常是由于對設計電路的分析不完整造成的有害開路。正常工作電流和環境溫度和過載在上述保險絲選擇涉及的所有因素中是非常重要，必須特別注意。使用時，熔斷器的選擇不應僅根據正常工作電流和環境溫度，還應注意其他使用條件。例如，常規電源出現有害斷路的一個常見原因是未充分考慮熔斷器標稱熔化熱能的額定值，還必須滿足電源平滑過濾輸入電容器產生的浪涌電流的要求。如果保險絲要安全可靠地工作，保險絲的熔化熱能不得大于保險絲標稱熔化熱能額定值的20％。<br /> 標稱熔化熱能：指熔化和破壞部件所需的能量，單位為i2t，讀數為“安培平方秒”。通常，熔化熱能測試應在權威認證機構進行：向保險絲施加電流增量并測量熔化時間。如果在約0.008秒或更長時間內未發生熔化，則增加脈沖電流的強度。重復該實驗，直到保險絲的熔斷時間在0.008秒內。本試驗的目的是確保產生的熱能沒有足夠的時間通過熱傳導從保險絲組件中逸出，也就是說，所有的熱能都用于斷開保險絲。<br /> 因此，在選擇保險絲時，除了上述正常工作電流、額定值降低和環境溫度外，還應考慮i2t值。還要注意的是，在焊接這些保險絲時應特別小心因為大多數保險絲都有焊接接頭。因為太多的焊接熱會使熔絲中的焊料回流并改變其額定值。保險絲類似于半導體的熱元件。因此，焊接保險絲時，最好使用吸熱裝置。</span></span></span> <hr /><span style="line-height:200%;"><span style="font-size:15px;"><span style="font-family:微軟雅黑,arial;">方案推薦：<a href="http://www.520peixun.com/products/category-599/"><strong>巴斯曼貼片電阻<img src="/u_file/2204/photo/2204/2022042117590899.jpeg" /></strong></a></span></span></span> </div> <div id="page" class="wow fadeInUp wrap"> <div class="prev fl">上一篇 : <a 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