產(chǎn)品詳情
SCONINC變換器SCONI-AH90-D29A-HD,出售大秦 DPPH-111-3DAEYEON轉(zhuǎn)換器;DY-LSC-51AOY DY-LSC-52AOY DY-LSC-53AOY DY-LSC-54AOY DY-LSC-55AOY DY-LSC-56AOY
DAEYEON轉(zhuǎn)換器;DY-LSC-5AAOY DY-LSC-5BAOY DY-LSC-5CAOY DY-LSC-5DAOY DY-LSC-5OAOY
DAEYEON轉(zhuǎn)換器;DY-LSC-61AOY DY-LSC-62AOY DY-LSC-63AOY DY-LSC-64AOY DY-LSC-65AOY DY-LSC-66AOY
DAEYEON轉(zhuǎn)換器;DY-LSC-6AAOY DY-LSC-6BAOY DY-LSC-6CAOY DY-LSC-6DAOY DY-LSC-6OAOY
DAEYEON轉(zhuǎn)換器;DY-LSC-A1AOY DY-LSC-A2AOY DY-LSC-A3AOY DY-LSC-A4AOY DY-LSC-A5AOY DY-LSC-A6AOY
DAEYEON轉(zhuǎn)換器;DY-LSC-AAAOY DY-LSC-ABAOY DY-LSC-ACAOY DY-LSC-ADAOY DY-LSC-AOAOY
DAEYEON轉(zhuǎn)換器;DY-LSC-B1AOY DY-LSC-B2AOY DY-LSC-B3AOY DY-LSC-B4AOY DY-LSC-B5AOY DY-LSC-B6AOY
DAEYEON轉(zhuǎn)換器;DY-LSC-BAAOY DY-LSC-BBAOY DY-LSC-BCAOY DY-LSC-BDAOY DY-LSC-BOAOY
DAEYEON轉(zhuǎn)換器;DY-LSC-C1AOY DY-LSC-C2AOY DY-LSC-C3AOY DY-LSC-AOY DY-LSC-C5AOY DY-LSC-C6AOY
DAEYEON轉(zhuǎn)換器;DY-LSC-CAAOY DY-LSC-CBAOY DY-LSC-CCAOY DY-LSC-CDAOY DY-LSC-COAOY
DAEYEON轉(zhuǎn)換器;DY-LSC-D1AOY DY-LSC-D2AOY DY-LSC-D3AOY DY-LSC-D4AOY DY-LSC-D5AOY DY-LSC-D6AOY
避免憋壓損壞設(shè)備。(3)調(diào)節(jié)油品冷后溫度時,應(yīng)先冷卻水出口閥控制。因為采用入口閥控制水量,雖然可以節(jié)約冷水,但是會引起冷卻器內(nèi)水流短路或流速減慢,造成上熱下涼,影響換熱效果。故不宜用入口控制。排除故障編輯冷卻液不足添加冷卻液散熱器散熱片阻塞尋找解決阻塞的原因,清洗散熱器散熱器通風(fēng)不暢按安裝要求增大通風(fēng)有效面積,確保通風(fēng)暢通冷卻液風(fēng)扇運行不正常檢查風(fēng)扇皮帶緊張度,必要時更換皮帶風(fēng)扇損壞檢修或更換水泵損壞檢修或更換節(jié)溫器故障更換噴油泵故障請人員檢修或更換供油定時不正確查看噴油泵數(shù)據(jù)并請人員檢修(進(jìn)氣)溫度過高保持機(jī)房通風(fēng)合理機(jī)房溫度機(jī)組過載嚴(yán)重控制負(fù)載。當(dāng)局部固體絕緣沿面的電場強(qiáng)度達(dá)到一定數(shù)值時,就會造成局部放電。上述局部放電的直接后果是使絕緣油裂解,在絕緣層間生成大量的x臘,介損增大。這種放電是有累積效應(yīng)的,任其發(fā)展下去,油中氣體分析將可能出現(xiàn)電弧放電的特征。3)由于絕緣材料不清潔或含濕高,可能在其表面產(chǎn)生沿面放電。這種情況多見于一次端子引線沿墊塊表面放電。4)某些連接松動或金屬件電位懸浮將火花放電,例如一次繞組支持螺母松動,造成一次繞組屏蔽鋁箔電位懸浮,末屏引線或焊接不良甚至斷線,均會引起此類故障。5)-次連接夾板、螺栓、螺母松動,末屏接地螺母松動,緊固螺母松動等,均可能使電阻增大,從而局部過熱故障。此外,現(xiàn)場不當(dāng)也應(yīng)引起。
晶閘管就不能導(dǎo)通。控制極的作用是通過外加正向觸發(fā)脈沖使晶閘管導(dǎo)通,卻不能使它關(guān)斷。那么,用什么才能使導(dǎo)通的晶閘管關(guān)斷呢?使導(dǎo)通的晶閘管關(guān)斷,可以斷開陽極電源(圖3中的開關(guān)S)或使陽極電流小于維持導(dǎo)通的值(稱為維持電流)。如果晶閘管陽極和陰極之間外加的是交流電壓或脈動直流電壓,那么,在電壓過零時,晶閘管會自行關(guān)斷。應(yīng)用類型圖4示出了雙向可控硅的特性曲線。由圖可見,雙向可控硅的特性曲線是由三兩個象限內(nèi)的曲線組合成的。象限的曲線說明當(dāng)加到主電極上的電壓使Tc對T1的極性為正時,我們稱為正向電壓,并用符號U21表示。當(dāng)這個電壓逐漸到等于轉(zhuǎn)折電壓UBO時,圖3(b)左邊的可控硅就觸發(fā)導(dǎo)通,這時的通態(tài)電流為I21。
DAEYEON轉(zhuǎn)換器;DY-LSC-DAAOY DY-LSC-DBAOY DY-LSC-DCAOY DY-LSC-DDAOY DY-LSC-DOAOY
DAEYEON轉(zhuǎn)換器;DY-LSC-O1AOY DY-LSC-O2AOY DY-LSC-O3AOY DY-LSC-O4AOY DY-LSC-O5AOY DY-LSC-O6AOY
DAEYEON轉(zhuǎn)換器;DY-LSC-OAAOY DY-LSC-OBAOY DY-LSC-OCAOY DY-LSC-ODAOY DY-LSC-OOAOY
DAEYEON轉(zhuǎn)換器;DY-LSC-11ANY DY-LSC-12ANY DY-LSC-13ANY DY-LSC-14ANY DY-LSC-15ANY DY-LSC-16ANY
DAEYEON轉(zhuǎn)換器;DY-LSC-1AANY DY-LSC-1BANY DY-LSC-1CANY DY-LSC-1DANY DY-LSC-1OANY
DAEYEON轉(zhuǎn)換器;DY-LSC-21ANY DY-LSC-22ANY DY-LSC-23ANY DY-LSC-24ANY DY-LSC-25ANY DY-LSC-26ANY
DAEYEON轉(zhuǎn)換器;DY-LSC-2AANY DY-LSC-2BANY DY-LSC-2CANY DY-LSC-2DANY DY-LSC-2OANY
DAEYEON轉(zhuǎn)換器;DY-LSC-31ANY DY-LSC-32ANY DY-LSC-33ANY DY-LSC-34ANY DY-LSC-35ANY DY-LSC-36ANY
DAEYEON轉(zhuǎn)換器;DY-LSC-3AANY DY-LSC-3BANY DY-LSC-3CANY DY-LSC-3DANY DY-LSC-3OANY
同時也可避免因積塵引起的漏電和短路事故。清掃灰塵可用干燥的毛刷進(jìn)行,也可用于皮老虎吹和吸塵器吸。對于大塊污垢,可用絕緣棒去除。若有條件,可用0.6MPa左右的壓縮空氣吹除。平時注意觀察風(fēng)機(jī)的運行情況,一旦發(fā)現(xiàn)風(fēng)機(jī)轉(zhuǎn)速慢或異常,應(yīng)及時修理(如油垢、積塵,加油,更換損壞或變質(zhì)的電容器)。對損壞的風(fēng)機(jī)要及時更換。如果在沒有風(fēng)機(jī)的情況下使用軟起動器,將會損壞晶閘管。如果軟起動器使用較或易結(jié)露,應(yīng)經(jīng)常用紅外燈泡或電吹風(fēng)烘干,驅(qū)除潮氣,以避免漏電或短路事故的發(fā)生。并將此轉(zhuǎn)換為可顯示的轉(zhuǎn)速值。發(fā)動機(jī)轉(zhuǎn)速越快,點火線圈產(chǎn)生的脈沖越多,表上顯示的轉(zhuǎn)速值就越大。轎車一般都是電子式轉(zhuǎn)速表,有指針式和液晶數(shù)字顯示式,表內(nèi)有數(shù)字集成電路,它將點火線圈輸送過來的電壓脈沖經(jīng)過計算后驅(qū)動指針或數(shù)字顯示。另外還有一種轉(zhuǎn)速表是從發(fā)電機(jī)取出脈沖送到轉(zhuǎn)速表電路解釋后顯示轉(zhuǎn)速值,不過因受發(fā)電機(jī)皮帶打滑等因素影響,數(shù)值不太。溫度表(Thermometer[1])是一種運用不同原理來測量物體(或空間)溫度或溫度梯度的[2]。常見的有指針雙金屬溫度表,帶有表盤,可以直接測量氣體、和蒸汽。廣泛用于機(jī)械、造船、石油化工、冶金、電力、輕工業(yè)及研究等部門。中文名溫度表外文名Thermometer所屬學(xué)科大氣科學(xué)屬性儀器或傳感器別稱測溫儀器作用各類的溫度目錄1雙金屬溫度表工作原理2分類3用途4使用范圍雙金屬溫度表工作原理編輯用熱雙金屬片制成的螺旋狀感溫元件來測量溫度。
而且當(dāng)熔體發(fā)生熔斷時其兩端的電壓也很高,往往會出現(xiàn)熔體已熔化(熔斷)甚至已汽化,但是電流并沒有切斷,其原因就是在熔斷的一瞬間在電壓及電流的作用下,絲的兩電極之間發(fā)生拉弧現(xiàn)象。這個滅弧裝置必須有很強(qiáng)的絕緣性與很好的導(dǎo)熱性,且呈負(fù)電性。石英砂就是常用的滅弧材料。熔斷裝置另外,還有一些絲有熔斷指示裝置,它的作用就是當(dāng)絲(熔斷)后其本身發(fā)生一定的外觀變化,易于被維修人員發(fā)現(xiàn),例如:發(fā)光、變色、彈出固體指示器等。分?jǐn)嗄芰庉嫯?dāng)介于常規(guī)不熔斷電流與相關(guān)規(guī)定的額定分?jǐn)嗄芰Γǖ碾娏鳎┲g的電流作用于絲時,絲應(yīng)能滿意地,而且不會危及周圍。絲被安置的電路的預(yù)期故障電流必須小于規(guī)定的額定分?jǐn)嗄芰﹄娏鳌?br />
DAEYEON轉(zhuǎn)換器;DY-LSC-41ANY DY-LSC-42ANY DY-LSC-43ANY DY-LSC-44ANY DY-LSC-45ANY DY-LSC-46ANY
DAEYEON轉(zhuǎn)換器;DY-LSC-4AANY DY-LSC-4BANY DY-LSC-4CANY DY-LSC-4DANY DY-LSC-4OANY
DAEYEON轉(zhuǎn)換器;DY-LSC-51ANY DY-LSC-52ANY DY-LSC-53ANY DY-LSC-54ANY DY-LSC-55ANY DY-LSC-56ANY
DAEYEON轉(zhuǎn)換器;DY-LSC-5AANY DY-LSC-5BANY DY-LSC-5CANY DY-LSC-5DANY DY-LSC-5OANY
DAEYEON轉(zhuǎn)換器;DY-LSC-61ANY DY-LSC-62ANY DY-LSC-63ANY DY-LSC-64ANY DY-LSC-65ANY DY-LSC-66ANY
DAEYEON轉(zhuǎn)換器;DY-LSC-6AANY DY-LSC-6BANY DY-LSC-6CANY DY-LSC-6DANY DY-LSC-6OANY
DAEYEON轉(zhuǎn)換器;DY-LSC-A1ANY DY-LSC-A2ANY DY-LSC-A3ANY DY-LSC-A4ANY DY-LSC-A5ANY DY-LSC-A6ANY
DAEYEON轉(zhuǎn)換器;DY-LSC-AAANY DY-LSC-ABANY DY-LSC-ACANY DY-LSC-ADANY DY-LSC-AOANY
DAEYEON轉(zhuǎn)換器;DY-LSC-B1ANY DY-LSC-B2ANY DY-LSC-B3ANY DY-LSC-B4ANY DY-LSC-B5ANY DY-LSC-B6ANY
DAEYEON轉(zhuǎn)換器;DY-LSC-BAANY DY-LSC-BBANY DY-LSC-BCANY DY-LSC-BDANY DY-LSC-BOANY
DAEYEON轉(zhuǎn)換器;DY-LSC-C1ANY DY-LSC-C2ANY DY-LSC-C3ANY DY-LSC-ANY DY-LSC-C5ANY DY-LSC-C6ANY
DAEYEON轉(zhuǎn)換器;DY-LSC-CAANY DY-LSC-CBANY DY-LSC-CCANY DY-LSC-CDANY DY-LSC-COANY
當(dāng)線圈通以交流電流時,在感應(yīng)元件的電磁鐵中,由于短路環(huán)的移相作用,產(chǎn)生兩個相位不同的磁通,此磁通與其在鋁盤中感應(yīng)的渦流相互作用,產(chǎn)生電磁力知使鋁盤,當(dāng)電流增大到整定電流時,電磁力矩大于彈簧的反作矩,鋁支架轉(zhuǎn)動,扇齒與蝸桿咬合,并隨著蝸桿而上升,其頂桿推動電磁元件的動鐵,當(dāng)動鐵與電磁鐵之間的氣隙減小到一定程度時,動鐵被吸合,動鐵尾部的頂板推動接點閉合,并推下牌,顯示繼電器過電流狀態(tài)。設(shè)備介紹編輯原理電磁式過流繼電器的工作原理是復(fù)合式的,由公用一個線圈的感應(yīng)式和電磁式的兩個元件組成。當(dāng)繼電器的線圈通以交流電流時,則在鐵芯的遮蔽與未遮蔽部分產(chǎn)生兩個具有一定相位差的磁通。此磁通與其在圓盤中感應(yīng)的渦流相互作用。可用于10kV以上的戶外式配電裝置;充氣式電壓互感器用于SF6電器中。按工作原理電磁式電壓互感器:是利用電磁感應(yīng)原理按比例變換電壓或電流的設(shè)備。電容式電壓互感器:電容式電壓互感器(CVT)是由串聯(lián)電容器分壓,再經(jīng)電磁式互感器降壓和隔離,作為表計、繼電保護(hù)等的一種電壓互感器,電容式電壓互感器還可以將載波耦合到輸電線用于長途通信、遠(yuǎn)方測量、選擇性的線路高頻保護(hù)、遙控、電傳打字等。電子式電壓互感器[5]:由連接到傳輸和二次轉(zhuǎn)換器的一個或多個電壓或電流傳感器組成的一種裝置,用以傳輸正比于被測量的量,供給測量儀器、儀表和繼電保護(hù)或控制裝置。銘牌標(biāo)志編輯電壓互感器型號由以下幾部分組成[1]。
又稱為SoftStarter。它不僅實現(xiàn)在整個起動中無沖擊而的起動電機(jī),而且可根據(jù)電動機(jī)負(fù)載的特性來調(diào)節(jié)起動中的參數(shù),如限流值、起動時間等。此外,它還具有多種對電機(jī)保護(hù)功能,這就從根本上解決了的降壓起動設(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,變頻器的價格不再高高在上,它不僅解決了電機(jī)啟動產(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)光一時的軟啟動器似乎有些沒落,聲音越來越小。但是軟啟動器面臨的替代壓力確實越來越大,[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。