蘇州市批發(fā)shinhwa繼電器SAS-2350A,韓國Sinwoo S-CON變送器。中山立訊電氣有限公司,中山朗立電氣有限公司
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因進(jìn)線電壓過高，直流回路電壓超過了設(shè)定的極限值，在減速時(shí)電壓調(diào)節(jié)器起作用，造成制動(dòng)電流很小，電機(jī)轉(zhuǎn)速降不下來，而在軋鋼時(shí)，電網(wǎng)的負(fù)載加重，直流回路電壓低于115%的極限設(shè)定值，制動(dòng)功能恢復(fù)正常。在當(dāng)時(shí)無法降低電網(wǎng)電壓的情況下，將直流回路電壓極限設(shè)定值增至127%后，變頻器工作正常。在停產(chǎn)檢修時(shí)，我們根據(jù)電網(wǎng)的情況改變了變壓器的檔位，使變頻器的進(jìn)線電壓在允許的范圍內(nèi)，此后變頻器工作正常。(3)AEGMultiverter22/27-400變頻器上電后，操作面板上的液晶顯示屏顯示正常，但ready指示燈不亮，變頻器不能合閘查看變頻器菜單中的故障記錄時(shí)未發(fā)現(xiàn)有故障，而對(duì)操作面板上各按鍵的操作在事件記錄中則有記錄。
蘇州市批發(fā)shinhwa繼電器SAS-2350A,
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用于電力系統(tǒng)的電流互感器一次額定電流為5～25000A，用于試驗(yàn)設(shè)備的精密電流互感器為0.1～50000A。電流互感器可在一次額定電流下長(zhǎng)期運(yùn)行，負(fù)荷電流超過額定電流值時(shí)叫做過負(fù)荷，電流互感器長(zhǎng)期過負(fù)荷運(yùn)行，會(huì)燒壞繞組或減少使用壽命。2.3二次額定電流：允許通過電流互感器二次繞組的一次感應(yīng)電流。2.4額定電流比（變比）：一次額定電流與二次額定電流之比。2.5額定電壓：一次繞組長(zhǎng)期對(duì)地能夠承受的電壓（有效值以kV為單位），應(yīng)不低于所接線路的額定相電壓。電流互感器的額定電壓分為0.5，10，35，110，220，330，500kV等幾種電壓等級(jí)。2.610%倍數(shù)：在的二次負(fù)荷和任意功率因數(shù)下，電流互感器的電流誤差為－10%時(shí)。
蘇州市批發(fā)shinhwa繼電器SAS-2350A,
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MUL-7ER-W MUL-7ER-X MUL-7ER-Y MUL-7ER-Z
MUL-7EN-W MUL-7EN-X MUL-7EN-Y MUL-7EN-Z
MUL-7F1-W MUL-7F1-X MUL-7F1-Y MUL-7F1-Z
MUL-7F2-W MUL-7F2-X MUL-7F2-Y MUL-7F2-Z
過熱保護(hù)功能：通過軟起動(dòng)器內(nèi)部熱繼電器檢測(cè)晶閘管散熱器的溫度，一旦散熱器溫度超過允許值后自動(dòng)關(guān)斷晶閘管，并發(fā)出報(bào)警信號(hào)。測(cè)量回路參數(shù)功能：電動(dòng)機(jī)工作時(shí)，軟啟動(dòng)器內(nèi)的檢測(cè)器一直監(jiān)視著電動(dòng)機(jī)運(yùn)行狀態(tài)，并將監(jiān)測(cè)到的參數(shù)送給CPU進(jìn)行處理，CPU將監(jiān)測(cè)參數(shù)進(jìn)行分析、存儲(chǔ)、顯示。因此電動(dòng)機(jī)軟起動(dòng)器還具有測(cè)量回路參數(shù)的功能。其它功能：通過電子電路的組合，還可在系統(tǒng)中實(shí)現(xiàn)其它種種聯(lián)鎖保護(hù)。主要應(yīng)用交流鼠籠異步電動(dòng)機(jī)由于結(jié)構(gòu)簡(jiǎn)單，控制方便，效率高而被人們廣泛地應(yīng)用于機(jī)械設(shè)備的拖動(dòng)中。在民用建筑中的大多數(shù)機(jī)械設(shè)備如消防泵、噴淋泵、生活泵、冷凍機(jī)組等的動(dòng)力都是交流鼠籠異步電機(jī)。當(dāng)建筑物層數(shù)較高或規(guī)模較大時(shí)。
蘇州市批發(fā)shinhwa繼電器SAS-2350A,
MUL-7F3-W MUL-7F3-X MUL-7F3-Y MUL-7F3-Z
MUL-7F4-W MUL-7F4-X MUL-7F4-Y MUL-7F4-Z
MUL-7F5-W MUL-7F5-X MUL-7F5-Y MUL-7F5-Z
MUL-7F6-W MUL-7F6-X MUL-7F6-Y MUL-7F6-Z
MUL-7F7-W MUL-7F7-X MUL-7F7-Y MUL-7F7-Z
MUL-7F8-W MUL-7F8-X MUL-7F8-Y MUL-7F8-Z
MUL-7FR-W MUL-7FR-X MUL-7FR-Y MUL-7FR-Z
MUL-7FN-W MUL-7FN-X MUL-7FN-Y MUL-7FN-Z
MUL-7G1-W MUL-7G1-X MUL-7G1-Y MUL-7G1-Z
MUL-7G2-W MUL-7G2-X MUL-7G2-Y MUL-7G2-Z
MUL-7G3-W MUL-7G3-X MUL-7G3-Y MUL-7G3-Z
MUL-7G4-W MUL-7G4-X MUL-7G4-Y MUL-7G4-Z
MUL-7G5-W MUL-7G5-X MUL-7G5-Y MUL-7G5-Z
MUL-7G6-W MUL-7G6-X MUL-7G6-Y MUL-7G6-Z
MUL-7G7-W MUL-7G7-X MUL-7G7-Y MUL-7G7-Z
MUL-7G8-W MUL-7G8-X MUL-7G8-Y MUL-7G8-Z
MUL-7GR-W MUL-7GR-X MUL-7GR-Y MUL-7GR-Z
MUL-7GN-W MUL-7GN-X MUL-7GN-Y MUL-7GN-Z
MUL-7H1-W MUL-7H1-X MUL-7H1-Y MUL-7H1-Z
MUL-7H2-W MUL-7H2-X MUL-7H2-Y MUL-7H2-Z
MUL-7H3-W MUL-7H3-X MUL-7H3-Y MUL-7H3-Z
MUL-7H4-W MUL-7H4-X MUL-7H4-Y MUL-7H4-Z
MUL-7H5-W MUL-7H5-X MUL-7H5-Y MUL-7H5-Z
MUL-7H6-W MUL-7H6-X MUL-7H6-Y MUL-7H6-Z
MUL-7H7-W MUL-7H7-X MUL-7H7-Y MUL-7H7-Z
MUL-7H8-W MUL-7H8-X MUL-7H8-Y MUL-7H8-Z
MUL-7HR-W MUL-7HR-X MUL-7HR-Y MUL-7HR-Z
MUL-7HN-W MUL-7HN-X MUL-7HN-Y MUL-7HN-Z
MUL-9A1-W MUL-9A1-X MUL-9A1-Y MUL-9A1-Z
MUL-9A2-W MUL-9A2-X MUL-9A2-Y MUL-9A2-Z
MUL-9A3-W MUL-9A3-X MUL-9A3-Y MUL-9A3-Z
MUL-9A4-W MUL-9A4-X MUL-9A4-Y MUL-9A4-Z
MUL-9A5-W MUL-9A5-X MUL-9A5-Y MUL-9A5-Z
MUL-9A6-W MUL-9A6-X MUL-9A6-Y MUL-9A6-Z
MUL-9A7-W MUL-9A7-X MUL-9A7-Y MUL-9A7-Z
MUL-9A8-W MUL-9A8-X MUL-9A8-Y MUL-9A8-Z
MUL-9AR-W MUL-9AR-X MUL-9AR-Y MUL-9AR-Z
MUL-9AN-W MUL-9AN-X MUL-9AN-Y MUL-9AN-Z
MUL-9B1-W MUL-9B1-X MUL-9B1-Y MUL-9B1-Z
MUL-9B2-W MUL-9B2-X MUL-9B2-Y MUL-9B2-Z
MUL-9B3-W MUL-9B3-X MUL-9B3-Y MUL-9B3-Z
MUL-9B4-W MUL-9B4-X MUL-9B4-Y MUL-9B4-Z
MUL-9B5-W MUL-9B5-X MUL-9B5-Y MUL-9B5-Z
波形畸變不超過2%。過流整定范圍為2-9.9A(無輔助電源)，級(jí)差為0.1A，電流整定值誤差不大于±3%。速動(dòng)倍數(shù)整定范圍為2-9.9倍，級(jí)差為0.1倍，電流速動(dòng)整定值誤差不大于±3%。繼電器的速動(dòng)電流用電流整定值的倍數(shù)表示：速動(dòng)電流=速動(dòng)倍數(shù)×整定電流。速動(dòng)動(dòng)作時(shí)間：繼電器任一整定點(diǎn)上，在1.2倍速動(dòng)電流時(shí)的動(dòng)作時(shí)間不大于50ms。返回系數(shù)：不小于0.9。反時(shí)限特性曲線動(dòng)作方程：t：反時(shí)限動(dòng)作時(shí)間K：延時(shí)曲線系數(shù)（整定范圍0.1～9.9）。Is：整定電流值I：實(shí)際輸入電流值（注：I/Is不大于1.2為不推薦使用段）。反時(shí)限特性時(shí)間整定誤差：a)當(dāng)I/Is<2時(shí),平均誤差不大于10%；
蘇州市批發(fā)shinhwa繼電器SAS-2350A,
MUL-9B6-W MUL-9B6-X MUL-9B6-Y MUL-9B6-Z
MUL-9B7-W MUL-9B7-X MUL-9B7-Y MUL-9B7-Z
MUL-9B8-W MUL-9B8-X MUL-9B8-Y MUL-9B8-Z
MUL-9BR-W MUL-9BR-X MUL-9BR-Y MUL-9BR-Z
MUL-9BN-W MUL-9BN-X MUL-9BN-Y MUL-9BN-Z
MUL-9C1-W MUL-9C1-X MUL-9C1-Y MUL-9C1-Z
MUL-9C2-W MUL-9C2-X MUL-9C2-Y MUL-9C2-Z
MUL-9C3-W MUL-9C3-X MUL-9C3-Y MUL-9C3-Z
MUL-9C4-W MUL-9C4-X MUL-9C4-Y MUL-9C4-Z
MUL-9C5-W MUL-9C5-X MUL-9C5-Y MUL-9C5-Z
MUL-9C6-W MUL-9C6-X MUL-9C6-Y MUL-9C6-Z
MUL-9C7-W MUL-9C7-X MUL-9C7-Y MUL-9C7-Z
MUL-9C8-W MUL-9C8-X MUL-9C8-Y MUL-9C8-Z
MUL-9CR-W MUL-9CR-X MUL-9CR-Y MUL-9CR-Z
MUL-9CN-W MUL-9CN-X MUL-9CN-Y MUL-9CN-Z
MUL-9D1-W MUL-9D1-X MUL-9D1-Y MUL-9D1-Z
MUL-9D2-W MUL-9D2-X MUL-9D2-Y MUL-9D2-Z
MUL-9D3-W MUL-9D3-X MUL-9D3-Y MUL-9D3-Z
MUL-9D4-W MUL-9D4-X MUL-9D4-Y MUL-9D4-Z
MUL-9D5-W MUL-9D5-X MUL-9D5-Y MUL-9D5-Z
MUL-9D6-W MUL-9D6-X MUL-9D6-Y MUL-9D6-Z
MUL-9D7-W MUL-9D7-X MUL-9D7-Y MUL-9D7-Z
MUL-9D8-W MUL-9D8-X MUL-9D8-Y MUL-9D8-Z
MUL-9DR-W MUL-9DR-X MUL-9DR-Y MUL-9DR-Z
MUL-9DN-W MUL-9DN-X MUL-9DN-Y MUL-9DN-Z
MUL-9E1-W MUL-9E1-X MUL-9E1-Y MUL-9E1-Z
MUL-9E2-W MUL-9E2-X MUL-9E2-Y MUL-9E2-Z
MUL-9E3-W MUL-9E3-X MUL-9E3-Y MUL-9E3-Z
MUL-9E4-W MUL-9E4-X MUL-9E4-Y MUL-9E4-Z
MUL-9E5-W MUL-9E5-X MUL-9E5-Y MUL-9E5-Z
MUL-9E6-W MUL-9E6-X MUL-9E6-Y MUL-9E6-Z
MUL-9E7-W MUL-9E7-X MUL-9E7-Y MUL-9E7-Z
MUL-9E8-W MUL-9E8-X MUL-9E8-Y MUL-9E8-Z
MUL-9ER-W MUL-9ER-X MUL-9ER-Y MUL-9ER-Z
減少設(shè)備的沖擊和噪聲，延長(zhǎng)設(shè)備的使用壽命。采用變頻調(diào)速控制后，使機(jī)械系統(tǒng)簡(jiǎn)化，操作和控制更加方便，有的甚至可以改變?cè)械墓に囈?guī)范，從而提高了整個(gè)設(shè)備的功能。例如，紡織和許多行業(yè)用的定型機(jī)，機(jī)內(nèi)溫度是靠改變送入熱風(fēng)的多少來調(diào)節(jié)的。輸送熱風(fēng)通常用的是循環(huán)風(fēng)機(jī)，由于風(fēng)機(jī)速度不變，送入熱風(fēng)的多少只有用風(fēng)門來調(diào)節(jié)。如果風(fēng)門調(diào)節(jié)失靈或調(diào)節(jié)不當(dāng)就會(huì)造成定型機(jī)失控，從而影響成品質(zhì)量。循環(huán)風(fēng)機(jī)高速啟動(dòng)，傳動(dòng)帶與軸承之間磨損非常厲害，使傳動(dòng)帶變成了一種易耗品。在采用變頻調(diào)速后，溫度調(diào)節(jié)可以通過變頻器自動(dòng)調(diào)節(jié)風(fēng)機(jī)的速度來實(shí)現(xiàn)，解決了產(chǎn)品質(zhì)量問題。此外，變頻器能夠很方便地實(shí)現(xiàn)風(fēng)機(jī)在低頻低速下啟動(dòng)并減少了傳動(dòng)帶與軸承之間的磨損。
蘇州市批發(fā)shinhwa繼電器SAS-2350A,
MUL-9EN-W MUL-9EN-X MUL-9EN-Y MUL-9EN-Z
MUL-9F1-W MUL-9F1-X MUL-9F1-Y MUL-9F1-Z
MUL-9F2-W MUL-9F2-X MUL-9F2-Y MUL-9F2-Z
MUL-9F3-W MUL-9F3-X MUL-9F3-Y MUL-9F3-Z
MUL-9F4-W MUL-9F4-X MUL-9F4-Y MUL-9F4-Z
MUL-9F5-W MUL-9F5-X MUL-9F5-Y MUL-9F5-Z
MUL-9F6-W MUL-9F6-X MUL-9F6-Y MUL-9F6-Z
MUL-9F7-W MUL-9F7-X MUL-9F7-Y MUL-9F7-Z
MUL-9F8-W MUL-9F8-X MUL-9F8-Y MUL-9F8-Z
MUL-9FR-W MUL-9FR-X MUL-9FR-Y MUL-9FR-Z
MUL-9FN-W MUL-9FN-X MUL-9FN-Y MUL-9FN-Z
MUL-9G1-W MUL-9G1-X MUL-9G1-Y MUL-9G1-Z
MUL-9G2-W MUL-9G2-X MUL-9G2-Y MUL-9G2-Z
MUL-9G3-W MUL-9G3-X MUL-9G3-Y MUL-9G3-Z
MUL-9G4-W MUL-9G4-X MUL-9G4-Y MUL-9G4-Z
MUL-9G5-W MUL-9G5-X MUL-9G5-Y MUL-9G5-Z
MUL-9G6-W MUL-9G6-X MUL-9G6-Y MUL-9G6-Z
MUL-9G7-W MUL-9G7-X MUL-9G7-Y MUL-9G7-Z
MUL-9G8-W MUL-9G8-X MUL-9G8-Y MUL-9G8-Z
MUL-9GR-W MUL-9GR-X MUL-9GR-Y MUL-9GR-Z
MUL-9GN-W MUL-9GN-X MUL-9GN-Y MUL-9GN-Z
MUL-9H1-W MUL-9H1-X MUL-9H1-Y MUL-9H1-Z
MUL-9H2-W MUL-9H2-X MUL-9H2-Y MUL-9H2-Z
MUL-9H3-W MUL-9H3-X MUL-9H3-Y MUL-9H3-Z
MUL-9H4-W MUL-9H4-X MUL-9H4-Y MUL-9H4-Z
MUL-9H5-W MUL-9H5-X MUL-9H5-Y MUL-9H5-Z
MUL-9H6-W MUL-9H6-X MUL-9H6-Y MUL-9H6-Z
MUL-9H7-W MUL-9H7-X MUL-9H7-Y MUL-9H7-Z
MUL-9H8-W MUL-9H8-X MUL-9H8-Y MUL-9H8-Z
MUL-9HR-W MUL-9HR-X MUL-9HR-Y MUL-9HR-Z
MUL-9HN-W MUL-9HN-X MUL-9HN-Y MUL-9HN-Z
所以，各變頻器都在散熱板上配置了過熱保護(hù)器件；⑶制動(dòng)電阻過熱保護(hù)制動(dòng)電阻的標(biāo)稱功率是按短時(shí)運(yùn)行選定的。所以，一旦通電時(shí)間過長(zhǎng)，就會(huì)過熱。這時(shí)，應(yīng)暫停使用，待冷卻后再用?；蜻x用較大一點(diǎn)功率電阻；⑷冷卻風(fēng)道的入口和出口不得堵塞，環(huán)境溫度也可能高于變頻器的允許值。如果還有問題，你可以打電話給我們。在VVVF的實(shí)施，有兩種基本的調(diào)制方法：1.脈幅調(diào)制（PAM）逆變器所得交流電壓的振幅值等于直流電壓值（Um=Ud)。因此，實(shí)現(xiàn)變頻也是變壓的容易想到的方法，便是在調(diào)節(jié)頻率的同時(shí)，也調(diào)節(jié)直流電壓；這種方法的特點(diǎn)是，變頻器在改變輸出頻率的同時(shí)，也改變了電壓的振幅值，故稱為脈幅調(diào)制，常用PAM(PulseAmplitudeModulation)表示。
蘇州市批發(fā)shinhwa繼電器SAS-2350A,
