繼電器SR469-CASE 469-P5-HI-A20-E議價
繼電器SR469-CASE 469-P5-HI-A20-E議價
繼電器SR469-CASE 469-P5-HI-A20-E議價
繼電器SR469-CASE 469-P5-HI-A20-E引腳圖
繼電器SR469-CASE 469-P5-HI-A20-E說明書
SR469-CASE 469-P5-HI-A20-E國家電網逐步規範了電表技術要求，制定相關行業標準以及技術規範，這為繼電器參數檢測提出了一些技術難題，如繼電器的負載通斷能力、開關特性測試等。因此，迫切需要研究一種設備，實現繼電器性能參數的綜合檢測。
SR469-CASE 469-P5-HI-A20-E根據繼電器性能參數測試要求，測試項目可以分為兩大類，一是不帶負載電流的測試項目，如動作值、觸點接觸電阻、機械壽命；二是帶負載電流的測試項目，如觸點接觸電壓、電壽命、過負荷能力。
SR469-CASE 469-P5-HI-A20-E主要測試項目簡單介紹如下：（1）動作值。繼電器動作時所需電壓值。（2）觸點接觸電阻。觸電閉合時，兩觸頭之間的電阻值。（3）機械壽命。機械部分在不損壞的情況下，繼電器反復開關動作次數。（4）觸點接觸電壓。觸電閉合時，觸電回路中施加·定負載電流，觸點間電壓值。（5）電壽命。繼電器驅動線圈兩端施加額定電壓，觸點回路中施加額定阻性負載時，每小時循環小於300次、佔空比1：4條件下，繼電器的可靠動作次數。（6）過負荷能力。繼電器驅動線圈兩端施加額定電壓，觸點回路中施加1．5倍額定負載時，動作頻率（10±1）次/分條件下，繼電器可靠動作次數 。
SR469-CASE 469-P5-HI-A20-E測觸點電阻：用萬用表的電阻擋，測量常閉觸點與動點電阻，其阻值應為0；而常開觸點與動點的阻值就為無窮大。由此可以區別出那個是常閉觸點，那個是常開觸點。
SR469-CASE 469-P5-HI-A20-E測線圈電阻：可用萬用表R×10擋測量繼電器線圈的阻值，從而判斷該線圈是否存在著開路現象。
SR469-CASE 469-P5-HI-A20-E測量吸合電壓和吸合電流：用可調穩壓電源和電流表，給繼電器輸入一組電壓，且在供電回路中串入電流表進行監測。慢慢調高電源電壓，聽到繼電器吸合的聲音時，記錄吸合電壓和吸合電流。為求準確，可以嘗試多次求平均值。
SR469-CASE 469-P5-HI-A20-E測量釋放電壓和釋放電流：也是像上述那樣連接測試，當繼電器發生吸合後，再逐漸降低供電電壓，當聽到繼電器再次發生釋放聲音時，記下此時的電壓和電流，亦可嘗試多次而取得平均的釋放電壓和釋放電流。一般情況下，繼電器的釋放電壓為吸合電壓的10%~50%如果釋放電壓大小(小於1/10的吸合電壓)，則不能正常使用，這樣會對電路的穩定性造成威脅，使工作不可靠。
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