延慶縣SANIL開關(guān)SA-18M,,M18,8mm,AC20-250V,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
LCT-2A1-W LCT-2A1-X LCT-2A1-Y LCT-2A1-Z
LCT-2A2-W LCT-2A2-X LCT-2A2-Y LCT-2A2-Z
LCT-2A3-W LCT-2A3-X LCT-2A3-Y LCT-2A3-Z
LCT-2A4-W LCT-2A4-X LCT-2A4-Y LCT-2A4-Z
LCT-2A5-W LCT-2A5-X LCT-2A5-Y LCT-2A5-Z
LCT-2A6-W LCT-2A6-X LCT-2A6-Y LCT-2A6-Z
LCT-2A7-W LCT-2A7-X LCT-2A7-Y LCT-2A7-Z
LCT-2A8-W LCT-2A8-X LCT-2A8-Y LCT-2A8-Z
LCT-2AR-W LCT-2AR-X LCT-2AR-Y LCT-2AR-Z
LCT-2AN-W LCT-2AN-X LCT-2AN-Y LCT-2AN-Z
LCT-2B1-W LCT-2B1-X LCT-2B1-Y LCT-2B1-Z
LCT-2B2-W LCT-2B2-X LCT-2B2-Y LCT-2B2-Z
LCT-2B3-W LCT-2B3-X LCT-2B3-Y LCT-2B3-Z
LCT-2B4-W LCT-2B4-X LCT-2B4-Y LCT-2B4-Z
LCT-2B5-W LCT-2B5-X LCT-2B5-Y LCT-2B5-Z
LCT-2B6-W LCT-2B6-X LCT-2B6-Y LCT-2B6-Z
LCT-2B7-W LCT-2B7-X LCT-2B7-Y LCT-2B7-Z
又稱為SoftStarter。它不僅實(shí)現(xiàn)在整個(gè)起動(dòng)過程中無沖擊而平滑的起動(dòng)電機(jī)，而且可根據(jù)電動(dòng)機(jī)負(fù)載的特性來調(diào)節(jié)起動(dòng)過程中的參數(shù)，如限流值、起動(dòng)時(shí)間等。此外，它還具有多種對(duì)電機(jī)保護(hù)功能，這就從根本上解決了傳統(tǒng)的降壓起動(dòng)設(shè)備的諸多弊端。發(fā)展趨勢編輯隨著國產(chǎn)變頻器產(chǎn)業(yè)的迅速發(fā)展，變頻器的價(jià)格不再高高在上，它不僅解決了電機(jī)啟動(dòng)產(chǎn)生大沖擊電流的問題，并且具有很好的節(jié)能效果，因此，曾經(jīng)風(fēng)光一時(shí)的軟啟動(dòng)器似乎有些沒落，聲音越來越小。但是軟啟動(dòng)器面臨的替代壓力確實(shí)越來越大，[1]這種情況在尤為明顯。由于工業(yè)技術(shù)一直較為落后，在十多年前，的變頻器產(chǎn)業(yè)剛剛起步，沒有定價(jià)權(quán)，國內(nèi)市場大部分為品牌占據(jù)，變頻器的成本一直居高不下。
延慶縣SANIL開關(guān)SA-18M,,M18,8mm,AC20-250V,
LCT-2B8-W LCT-2B8-X LCT-2B8-Y LCT-2B8-Z
LCT-2BR-W LCT-2BR-X LCT-2BR-Y LCT-2BR-Z
LCT-2BN-W LCT-2BN-X LCT-2BN-Y LCT-2BN-Z
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LCT-2C3-W LCT-2C3-X LCT-2C3-Y LCT-2C3-Z
LCT-2C4-W LCT-2C4-X LCT-2C4-Y LCT-2C4-Z
LCT-2C5-W LCT-2C5-X LCT-2C5-Y LCT-2C5-Z
LCT-2C6-W LCT-2C6-X LCT-2C6-Y LCT-2C6-Z
LCT-2C7-W LCT-2C7-X LCT-2C7-Y LCT-2C7-Z
LCT-2C8-W LCT-2C8-X LCT-2C8-Y LCT-2C8-Z
LCT-2CR-W LCT-2CR-X LCT-2CR-Y LCT-2CR-Z
LCT-2CN-W LCT-2CN-X LCT-2CN-Y LCT-2CN-Z
LCT-2D1-W LCT-2D1-X LCT-2D1-Y LCT-2D1-Z
LCT-2D2-W LCT-2D2-X LCT-2D2-Y LCT-2D2-Z
LCT-2D3-W LCT-2D3-X LCT-2D3-Y LCT-2D3-Z
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LCT-2R7-W LCT-2R7-X LCT-2R7-Y LCT-2R7-Z
LCT-2R8-W LCT-2R8-X LCT-2R8-Y LCT-2R8-Z
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LCT-2RN-W LCT-2RN-X LCT-2RN-Y LCT-2RN-Z
LCT-4A1-W LCT-4A1-X LCT-4A1-Y LCT-4A1-Z
LCT-4A2-W LCT-4A2-X LCT-4A2-Y LCT-4A2-Z
LCT-4A3-W LCT-4A3-X LCT-4A3-Y LCT-4A3-Z
LCT-4A4-W LCT-4A4-X LCT-4A4-Y LCT-4A4-Z
LCT-4A5-W LCT-4A5-X LCT-4A5-Y LCT-4A5-Z
LCT-4A6-W LCT-4A6-X LCT-4A6-Y LCT-4A6-Z
LCT-4A7-W LCT-4A7-X LCT-4A7-Y LCT-4A7-Z
LCT-4A8-W LCT-4A8-X LCT-4A8-Y LCT-4A8-Z
LCT-4AR-W LCT-4AR-X LCT-4AR-Y LCT-4AR-Z
檢查變頻器內(nèi)A10主板、A22電源板上的LED指示燈均正常，用試電筆測變頻器的進(jìn)線電源，發(fā)現(xiàn)有一相顯示不正常，用萬用表測量三相結(jié)果為:Vab=390V，Vac=190V，Vbc=190V。經(jīng)檢查系進(jìn)線端子排處接觸不良。ready指示燈是變頻器內(nèi)各種狀態(tài)信息的綜合反映，當(dāng)它不亮?xí)r可提示維護(hù)人員注意變頻器尚未就緒。此時(shí)在進(jìn)線電源不正常時(shí)變頻器的故障記錄中未能反映未就緒的原因，可能與電路的設(shè)計(jì)有關(guān)。(4)調(diào)試過程中變頻器啟動(dòng)后即過流跳閘變頻器供貨方與被控設(shè)備的供貨方因溝通上的原因，在容量上不匹配(電機(jī)功率為30kW)。將變頻器的控制模式選為矢量控制，在輸入電機(jī)參數(shù)時(shí)，變頻器自動(dòng)將電機(jī)的額定電流60A限定在45A。
延慶縣SANIL開關(guān)SA-18M,,M18,8mm,AC20-250V,
LCT-4AN-W LCT-4AN-X LCT-4AN-Y LCT-4AN-Z
LCT-4B1-W LCT-4B1-X LCT-4B1-Y LCT-4B1-Z
LCT-4B2-W LCT-4B2-X LCT-4B2-Y LCT-4B2-Z
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LCT-4B5-W LCT-4B5-X LCT-4B5-Y LCT-4B5-Z
LCT-4B6-W LCT-4B6-X LCT-4B6-Y LCT-4B6-Z
LCT-4B7-W LCT-4B7-X LCT-4B7-Y LCT-4B7-Z
LCT-4B8-W LCT-4B8-X LCT-4B8-Y LCT-4B8-Z
LCT-4BR-W LCT-4BR-X LCT-4BR-Y LCT-4BR-Z
LCT-4BN-W LCT-4BN-X LCT-4BN-Y LCT-4BN-Z
LCT-4C1-W LCT-4C1-X LCT-4C1-Y LCT-4C1-Z
LCT-4C2-W LCT-4C2-X LCT-4C2-Y LCT-4C2-Z
LCT-4C3-W LCT-4C3-X LCT-4C3-Y LCT-4C3-Z
LCT-4C4-W LCT-4C4-X LCT-4C4-Y LCT-4C4-Z
LCT-4C5-W LCT-4C5-X LCT-4C5-Y LCT-4C5-Z
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LCT-4C7-W LCT-4C7-X LCT-4C7-Y LCT-4C7-Z
LCT-4C8-W LCT-4C8-X LCT-4C8-Y LCT-4C8-Z
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LCT-4D1-W LCT-4D1-X LCT-4D1-Y LCT-4D1-Z
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LCT-4D5-W LCT-4D5-X LCT-4D5-Y LCT-4D5-Z
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LCT-4D7-W LCT-4D7-X LCT-4D7-Y LCT-4D7-Z
LCT-4D8-W LCT-4D8-X LCT-4D8-Y LCT-4D8-Z
LCT-4DR-W LCT-4DR-X LCT-4DR-Y LCT-4DR-Z
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LCT-4E2-W LCT-4E2-X LCT-4E2-Y LCT-4E2-Z
LCT-4E3-W LCT-4E3-X LCT-4E3-Y LCT-4E3-Z
LCT-4E4-W LCT-4E4-X LCT-4E4-Y LCT-4E4-Z
LCT-4E5-W LCT-4E5-X LCT-4E5-Y LCT-4E5-Z
LCT-4E6-W LCT-4E6-X LCT-4E6-Y LCT-4E6-Z
LCT-4E7-W LCT-4E7-X LCT-4E7-Y LCT-4E7-Z
LCT-4E8-W LCT-4E8-X LCT-4E8-Y LCT-4E8-Z
LCT-4ER-W LCT-4ER-X LCT-4ER-Y LCT-4ER-Z
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LCT-4R1-W LCT-4R1-X LCT-4R1-Y LCT-4R1-Z
LCT-4R2-W LCT-4R2-X LCT-4R2-Y LCT-4R2-Z
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LCT-4R4-W LCT-4R4-X LCT-4R4-Y LCT-4R4-Z
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LCT-4R8-W LCT-4R8-X LCT-4R8-Y LCT-4R8-Z
LCT-4RR-W LCT-4RR-X LCT-4RR-Y LCT-4RR-Z
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LCT-7A1-W LCT-7A1-X LCT-7A1-Y LCT-7A1-Z
LCT-7A2-W LCT-7A2-X LCT-7A2-Y LCT-7A2-Z
LCT-7A3-W LCT-7A3-X LCT-7A3-Y LCT-7A3-Z
LCT-7A4-W LCT-7A4-X LCT-7A4-Y LCT-7A4-Z
LCT-7A5-W LCT-7A5-X LCT-7A5-Y LCT-7A5-Z
變頻器維修是一項(xiàng)理論知識(shí)、實(shí)踐經(jīng)驗(yàn)與操作水平的結(jié)合的工作，其技術(shù)水平?jīng)Q定著變頻器的維修質(zhì)量。從事變頻器維修的人員需要經(jīng)常學(xué)習(xí)，了解變頻器內(nèi)部的電子元器件所具備的功能和特點(diǎn)，開拓知識(shí)面，將新學(xué)到的知識(shí)應(yīng)用于實(shí)際工作中，不斷提高維修技術(shù)水平。中文名變頻器維修外文名Convertermaintenance方法靜態(tài)測試、動(dòng)態(tài)測試技術(shù)系列過電流保護(hù)、電壓保護(hù)目錄1常見方法?靜態(tài)測試?動(dòng)態(tài)測試?故障判斷2技術(shù)系列?過電流保護(hù)?電壓保護(hù)3基礎(chǔ)知識(shí)?技術(shù)發(fā)展?開關(guān)電源4過熱保護(hù)5故障案例6損壞原因7故障劃分8欠壓故障處理常見方法編輯靜態(tài)測試測試整流電路找下結(jié)果，可以判定電路已出現(xiàn)異常，A.到變頻器內(nèi)部直流電源的P端和N端。
延慶縣SANIL開關(guān)SA-18M,,M18,8mm,AC20-250V,
LCT-7A6-W LCT-7A6-X LCT-7A6-Y LCT-7A6-Z
LCT-7A7-W LCT-7A7-X LCT-7A7-Y LCT-7A7-Z
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LCT-7R5-W LCT-7R5-X LCT-7R5-Y LCT-7R5-Z
LCT-7R6-W LCT-7R6-X LCT-7R6-Y LCT-7R6-Z
給繼電器輸入一組電壓，且在供電回路中串入電流表進(jìn)行監(jiān)測。慢慢調(diào)高電源電壓，聽到繼電器吸合聲時(shí)，記下該吸合電壓和吸合電流。為求準(zhǔn)確，可以試多幾次而求平均值。釋放電壓電流也是像上述那樣連接測試，當(dāng)繼電器發(fā)生吸合后，再逐漸降低供電電壓，當(dāng)聽到繼電器再次發(fā)生釋放聲音時(shí)，記下此時(shí)的電壓和電流，亦可嘗試多幾次而取得平均的釋放電壓和釋放電流。一般情況下，繼電器的釋放電壓約在吸合電壓的10～50%，如果釋放電壓太小（小于1/10的吸合電壓），則不能正常使用了，這樣會(huì)對(duì)電路的穩(wěn)定性造成威脅，工作不可靠。電符號(hào)和觸點(diǎn)編輯繼電器線圈在電路中用一個(gè)長方框符號(hào)表示，如果繼電器有兩個(gè)線圈，就畫兩個(gè)并列的長方框。同時(shí)在長方框內(nèi)或長方框旁標(biāo)上繼電器的文字符號(hào)“J”。
延慶縣SANIL開關(guān)SA-18M,,M18,8mm,AC20-250V,
LCT-7R7-W LCT-7R7-X LCT-7R7-Y LCT-7R7-Z
LCT-7R8-W LCT-7R8-X LCT-7R8-Y LCT-7R8-Z
LCT-7RR-W LCT-7RR-X LCT-7RR-Y LCT-7RR-Z
LCT-7RN-W LCT-7RN-X LCT-7RN-Y LCT-7RN-Z
LCT-9A1-W LCT-9A1-X LCT-9A1-Y LCT-9A1-Z
LCT-9A2-W LCT-9A2-X LCT-9A2-Y LCT-9A2-Z
LCT-9A3-W LCT-9A3-X LCT-9A3-Y LCT-9A3-Z
LCT-9A4-W LCT-9A4-X LCT-9A4-Y LCT-9A4-Z
LCT-9A5-W LCT-9A5-X LCT-9A5-Y LCT-9A5-Z
LCT-9A6-W LCT-9A6-X LCT-9A6-Y LCT-9A6-Z
LCT-9A7-W LCT-9A7-X LCT-9A7-Y LCT-9A7-Z
LCT-9A8-W LCT-9A8-X LCT-9A8-Y LCT-9A8-Z
LCT-9AR-W LCT-9AR-X LCT-9AR-Y LCT-9AR-Z
LCT-9AN-W LCT-9AN-X LCT-9AN-Y LCT-9AN-Z
LCT-9B1-W LCT-9B1-X LCT-9B1-Y LCT-9B1-Z
LCT-9B2-W LCT-9B2-X LCT-9B2-Y LCT-9B2-Z
LCT-9B3-W LCT-9B3-X LCT-9B3-Y LCT-9B3-Z
LCT-9B4-W LCT-9B4-X LCT-9B4-Y LCT-9B4-Z
LCT-9B5-W LCT-9B5-X LCT-9B5-Y LCT-9B5-Z
LCT-9B6-W LCT-9B6-X LCT-9B6-Y LCT-9B6-Z
LCT-9B7-W LCT-9B7-X LCT-9B7-Y LCT-9B7-Z
LCT-9B8-W LCT-9B8-X LCT-9B8-Y LCT-9B8-Z
LCT-9BR-W LCT-9BR-X LCT-9BR-Y LCT-9BR-Z
LCT-9BN-W LCT-9BN-X LCT-9BN-Y LCT-9BN-Z
LCT-9C1-W LCT-9C1-X LCT-9C1-Y LCT-9C1-Z
LCT-9C2-W LCT-9C2-X LCT-9C2-Y LCT-9C2-Z
LCT-9C3-W LCT-9C3-X LCT-9C3-Y LCT-9C3-Z
LCT-9C4-W LCT-9C4-X LCT-9C4-Y LCT-9C4-Z
LCT-9C5-W LCT-9C5-X LCT-9C5-Y LCT-9C5-Z
LCT-9C6-W LCT-9C6-X LCT-9C6-Y LCT-9C6-Z
LCT-9C7-W LCT-9C7-X LCT-9C7-Y LCT-9C7-Z
LCT-9C8-W LCT-9C8-X LCT-9C8-Y LCT-9C8-Z
LCT-9CR-W LCT-9CR-X LCT-9CR-Y LCT-9CR-Z
LCT-9CN-W LCT-9CN-X LCT-9CN-Y LCT-9CN-Z
LCT-9D1-W LCT-9D1-X LCT-9D1-Y LCT-9D1-Z
采用交—直—交工作方式，即是輸入為交流電源，交流電壓三相整流橋整流后變?yōu)橹绷麟妷?，然后直流電壓?jīng)三相橋式逆變電路變換為調(diào)壓調(diào)頻的三相交流電輸出到負(fù)載。當(dāng)變頻器剛上電時(shí)，由于直流側(cè)的平波電容容量非常大，充電電流很大，通常采用一個(gè)起動(dòng)電阻來限制充電電流，常見的變頻起動(dòng)兩種電路，如圖1所示。充電完成后，控制電路通過繼電器的觸點(diǎn)或晶閘管將電阻短路，起動(dòng)電路故障一般表現(xiàn)為起動(dòng)電阻燒壞，變頻器報(bào)警顯示為直流母線電壓故障，一般設(shè)計(jì)者在設(shè)計(jì)變頻器的起動(dòng)電路時(shí)，為了減少變頻器的體積選擇起動(dòng)電阻，都選擇小一些，電阻值在10～50Ω，功率為10～50W。當(dāng)變頻器的交流輸入電源頻繁通時(shí)，或者旁路接觸器的觸點(diǎn)接觸不良時(shí)。
延慶縣SANIL開關(guān)SA-18M,,M18,8mm,AC20-250V,
LCT-9D2-W LCT-9D2-X LCT-9D2-Y LCT-9D2-Z
LCT-9D3-W LCT-9D3-X LCT-9D3-Y LCT-9D3-Z
LCT-9D4-W LCT-9D4-X LCT-9D4-Y LCT-9D4-Z
LCT-9D5-W LCT-9D5-X LCT-9D5-Y LCT-9D5-Z
LCT-9D6-W LCT-9D6-X LCT-9D6-Y LCT-9D6-Z
LCT-9D7-W LCT-9D7-X LCT-9D7-Y LCT-9D7-Z
LCT-9D8-W LCT-9D8-X LCT-9D8-Y LCT-9D8-Z
LCT-9DR-W LCT-9DR-X LCT-9DR-Y LCT-9DR-Z
LCT-9DN-W LCT-9DN-X LCT-9DN-Y LCT-9DN-Z
LCT-9E1-W LCT-9E1-X LCT-9E1-Y LCT-9E1-Z
LCT-9E2-W LCT-9E2-X LCT-9E2-Y LCT-9E2-Z
LCT-9E3-W LCT-9E3-X LCT-9E3-Y LCT-9E3-Z
LCT-9E4-W LCT-9E4-X LCT-9E4-Y LCT-9E4-Z
LCT-9E5-W LCT-9E5-X LCT-9E5-Y LCT-9E5-Z
LCT-9E6-W LCT-9E6-X LCT-9E6-Y LCT-9E6-Z
LCT-9E7-W LCT-9E7-X LCT-9E7-Y LCT-9E7-Z
LCT-9E8-W LCT-9E8-X LCT-9E8-Y LCT-9E8-Z
LCT-9ER-W LCT-9ER-X LCT-9ER-Y LCT-9ER-Z
LCT-9EN-W LCT-9EN-X LCT-9EN-Y LCT-9EN-Z
LCT-9R1-W LCT-9R1-X LCT-9R1-Y LCT-9R1-Z
LCT-9R2-W LCT-9R2-X LCT-9R2-Y LCT-9R2-Z
LCT-9R3-W LCT-9R3-X LCT-9R3-Y LCT-9R3-Z
LCT-9R4-W LCT-9R4-X LCT-9R4-Y LCT-9R4-Z
LCT-9R5-W LCT-9R5-X LCT-9R5-Y LCT-9R5-Z
LCT-9R6-W LCT-9R6-X LCT-9R6-Y LCT-9R6-Z
LCT-9R7-W LCT-9R7-X LCT-9R7-Y LCT-9R7-Z
LCT-9R8-W LCT-9R8-X LCT-9R8-Y LCT-9R8-Z
LCT-9RR-W LCT-9RR-X LCT-9RR-Y LCT-9RR-Z
LCT-9RN-W LCT-9RN-X LCT-9RN-Y LCT-9RN-Z
繼電器的觸點(diǎn)有兩種表示方法：一種是把它們直接畫在長方框一側(cè)，這種表示法較為直觀。另一種是按照電路連接的需要，把各個(gè)觸點(diǎn)分別畫到各自的控制電路中，通常在同一繼電器的觸點(diǎn)與線圈旁分別標(biāo)注上相同的文字符號(hào)，并將觸點(diǎn)組編上號(hào)碼，以示區(qū)別。繼電器的觸點(diǎn)有三種基本形式：1.動(dòng)合型（H型）線圈不通電時(shí)兩觸點(diǎn)是斷開的，通電后，兩個(gè)觸點(diǎn)就閉合。以合字的拼音字頭“H”表示。2.動(dòng)斷型（D型）線圈不通電時(shí)兩觸點(diǎn)是閉合的，通電后兩個(gè)觸點(diǎn)就斷開。用斷字的拼音字頭“D”表示。3.轉(zhuǎn)換型（Z型）這是觸點(diǎn)組型。這種觸點(diǎn)組共有三個(gè)觸點(diǎn)，即中間是動(dòng)觸點(diǎn)，上下各一個(gè)靜觸點(diǎn)。線圈不通電時(shí)，動(dòng)觸點(diǎn)和其中一個(gè)靜觸點(diǎn)斷開和另一個(gè)閉合，線圈通電后。
延慶縣SANIL開關(guān)SA-18M,,M18,8mm,AC20-250V,
