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                1. 高低壓開關柜/電容補償柜/啟動柜成套電氣設備生產商-襄陽赫特電氣制造有限公司歡迎您!

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                  HLQ籠型電機液體電阻起動器

                  文章來源:赫特電氣時間:2019-08-05 點擊數:

                  HLQ籠型電機液體電阻起動器

                  籠型電機液體電阻起動器高清大圖:

                  概    述

                            HLQ系列籠型電機液體電阻起動器是在高低壓鼠籠式(同步)電機的定子回路中串入起分壓和限流作用的特種液體電阻,在完成起動過程中,液體電阻值在設定的時間內自動實現由大到小的無級變化,從而使加在電機定子上的電壓逐步升高,當電動機的轉速接近額定轉速時,液體電阻自動切除,投入全壓運行,從而實現電動機的低電流平穩軟起動。該產品可廣泛應用化工、化肥、冶金、造紙、制藥、建材、礦山等行業的鼠籠式電機的起動。

                   

                  型號含義

                   

                   

                  工作原理

                      HLQ 系列籠型電機液體電阻起動器在電動機定子回路中串入起分壓和限流作用的特種液體電阻,起動過程中,液態電阻阻值在預定的時間內自動實現由大到小無級變化,直到接近為零時,液阻自動切除,電動機投入運行。

                   

                  性能特點

                  ★起動電流小,一般為額定電流的1.53.5倍,降低電機的發熱,有效延長電機的使用壽命;

                  ★起動平滑無沖擊,起動電壓降在8%以內,對電網影響小;

                  ★不受電網電壓波動和負載變化的影響,可確保一次起動成功,并可連續起動3次以上;

                  ★配有完善的報警提示功能和電機保護功能;

                  ★結構簡單,操作自動化,維護方便;

                  ★可以采用PLC控制或繼電器控制,也可實現兩種方式轉換;

                  根據用戶要求可以實現閉環控制。

                   

                  一次方案圖

                  推薦方案為我公司依據保證安全、技術符合、經濟實用的原則提供的優先方案,但因用戶現場需要的差異,也有用戶采用特殊的方案。

                   

                   

                  主要技術參數 

                  ★額定電壓(KV)3610

                  ★最高電壓(KV)3.67.212

                  ★一分鐘工頻耐受電壓(KV)2530/323842(相對地)

                  ★起動電流(V)q1.5~3 .5le

                  ★起動時間(S)10~60~120(現場可調)

                  ★電液正常工作溫度()5~70

                  ★連續起動次數()5~7

                   

                  使用環境條件

                  ★環境溫度:-40~+50℃;         空氣相對濕度:≤90%;

                  ★海拔高度:≤2000 m(海拔2000m以上的可根椐具體工況特殊設計)

                  ★地面傾斜度 :≤5°;

                  ★安裝地點無火災、爆炸危險、化學腐蝕及劇烈振動。

                  根據電機定子不同接線方式,起動裝置主回路連線示意圖

                   

                   

                  主要規格參數

                   

                  注:★根椐不同工況,外形及安裝尺寸可能會有所變化,請以具體產品為準。

                      ★隨著產品不斷更新換代,外形及安裝尺寸會有所變化,用戶對尺寸有要求時,請在訂貨時說明。

                   

                  符合標準

                  335 KV交流金屬封閉開關設備:GB39062006

                  ★企業標準:QXHR22005

                   

                  訂貨須知

                  訂貨時請提供以下資料:

                  ★電機型號、額定功率、額定電壓、額定電流、定子接法(Y/△)星點可否打開;

                  ★柜體表面顏色;

                  ★一次開關柜配置,參考一次方案圖,選擇一次方案;

                  ★電網及拖動負載情況;

                  ★若有特殊要求,請與我公司協商。

                   

                   

                  后編:

                   

                   

                   

                  籠型電機液體電阻起動器- 高壓水阻柜工作原理 

                  HLQ 系列籠型電機液體電阻起動器在電動機定子回路中串入起分壓和限流作用的特種液體電阻,起動過程中,液態電阻阻值在預定的時間內自動實現由大到小無級變化,直到接近為零時,液阻自動切除,電動機投入運行。 

                  液體電阻起動器又稱液體變阻器(俗稱水電阻)。是為改善大中型繞線式交流異步電動機的起動性能而研制的新型起動器。液體電阻起動器的基本原理是通過機械傳動裝置使導電液體中兩平行極板的距離逐漸減小直至為零,使串入電機轉子回路中的電阻值平滑減小,從而實現繞線式大中型電動機的重載平滑起動。它克服了頻敏電阻起動器沖擊電流大、難起動和操作不便等問題。適用于大型設備的電動機重載起動,是頻敏電阻起動器和金屬電阻起動器的替代產品。

                   一、應用范圍  

                  適用于三相交流50Hz,額定工作電壓為380V10KV,額定功率為75kW10000Kw繞線式(鼠籠式及同步電機用WLQ型)交流異步電動機的重載平滑軟起動,尤其是電網電壓不穩或偏低的工礦企業。  

                  二、工作原理  

                  在被控繞線電動機的轉子回路中串入特殊配置的電解液作為電阻,并通過調整電解液的濃度及改變兩極板間的距離使串入電阻阻值在起動過程中始終滿足電機機械特性對串入電阻值的要求,從而使電動機在獲得最大起動轉矩及最小起動電流的情況下均勻升速,起動結束,電氣開關短接轉子回路。

                   

                  三、主要性能特點  

                  ○軟起動,起動電流小:Iq1.3IeA  

                  ○降低了電機起動升溫,有效地延長電機使用壽命;  ○起動過程平滑,對機械設備無沖擊;  

                  ○可連續起動510次,起動性能優于頻敏起動器;  ○對電網要求不高,不會產生諧波而影響電網;  ○結構可靠、簡單,安裝、維護方便;  

                  ○通用性好,可適用任何負載狀況下繞線式電機軟起動,特別適用于重載起動;  

                  ○具有起動超時、失壓、超行程、超溫等多重保護功能。   

                  四、主要技術參數  

                  ○起動起始電流:Iq1.3IeA  

                  ○起動時間:1060s,預整定,現場可調  ○起動次數:連續起動510  ○電液正常工作溫度:570  ○外殼防護等級:IP20IP30  五、符合標準  

                  ○低壓成套開關設備和控制設備GB7251.1-1997IEC439-11992   

                  六、使用環境條件  

                  ○環境溫度:-4050  ○相對濕度:≤90  ○海拔高度:≤2000m  ○地面傾斜度不大于5°  

                  ○安裝地點無火災、爆炸危險、化學腐蝕及劇烈振動。壓交流電動機液態軟起動柜適用于額定電壓為3~10KV大、中型同步或異步電動機的軟起動。在靜態工作條件下,與電抗器性能相同;在動態工作條件下,可實現無級的連續起動。由于其利用液體電阻的負溫度特性,使電機的端電壓逐步上升,起動轉矩也逐步增加,因而電機起動比較平穩。特別是該系統結構簡單、可靠性強,不僅經濟實用,而且安裝和操作簡單、維護方便。  

                  它廣泛應用于冶金、建材、礦山、石化、供水、電力行業等的泵類、風機、壓縮機、破碎機、皮帶傳輸機等各大、中容量高壓電機的重載起動,是傳統的電抗器降壓起動、直接起動的理想的替代產品。

                    工作原理 

                  該裝置是在電機定子回路中串可變液體電阻的一種降壓起動方式,即隨著主電動機的起動,裝置自動改變液體電阻動、定極板之間的間距,使電阻線性均勻減小,電機端電壓均勻提高的一種起動方式。 主機起動結束后,軟起動裝置從主回路中完全脫離或處于零電位,活動極板自動復位,為下次起動作好準備。三使用環境條件: 1)環境溫度:最高氣溫﹢40℃,最低氣溫0℃; 2)空氣相對濕度不超過90% 

                  3)海拔高度不大于1000M 4)地面傾斜度不大于5°; 

                  5)安裝地點無火災、爆炸危險、化學腐蝕及劇烈震動; 注:若有特殊使用條件,請在訂貨時注明  符合標準 

                  高壓開關設備和控制設備標準共用技術要求    GB/T11022-1999 3-35KV交流金屬封閉開關設備                GB3906-1991 高壓交流電動機液態軟起動裝置              Q/FZR2-2000  功能說明 

                  本裝置主要由柜體、電氣室、電液箱和傳動機構四部份組成,下面分別介紹各部分的功能: (1)柜體 

                  由角鋼和金屬薄板焊接而成,柜體內預留有工作接地和接地母線,為保證柜體接地良好,應妥善與保護接地連接牢固;柜內應保持清潔、干凈,其一次進出線均采用高壓電纜連接下進下出。 (2)電氣室 

                  電氣室內安裝有各種用于在主機起動過程中參與控制保護的低壓電氣元件、PIC等,門是安裝有操作開關、信號燈等,室的下部安裝的是二次外接端子排,電氣室的電源為AC380V15A(三相四線)及±KM即可。

                   (3)電液箱 電液箱在柜內下部,箱內安裝有液體電阻的動、定極板,在主機起動過程中正是通過控制改變他們之間的間距來實現軟起動的,在停機斷電的情況下經常觀察液位高低,液面過低請注入清水(自來水)。電液箱是本裝置的核心之一,只有在箱體完好、狀態(包括液溫、液位)輸出正常、動定極板位置適宜,本柜才能輸出允許起動信號,主機才能完成起動合閘,關于允許起動信號所包含的全部條件將在使用及維護中進行介紹。 (4)傳動機構 傳動機構在柜內上部,主要作用是由傳動機電機帶動極板運動以改變電阻的大小來實現軟起動,應定期(每月)進行檢測、維護,以保證機構運轉靈活。 

                  電阻的大小對應有四個特征位置,分別有四個位置開關,分別是初限位、初限位保護、末限位、末限位保護,其中初、末限位間的間距,是本液態軟起動裝置的有效控制行程,在初限位處電阻最大,末限位處電阻最小(接近為0),初、末限位保護是控制傳動機構的最大活動空間,它們動作時均有報警輸出,但只作為警示信號,不要求主要停車檢修。報警信號的消除可通過操作電氣室門上的手動試車、手動復位按鈕使機構脫離報警位即可。初限位保護位置開關是初限位位置開關的后備,作用是控制傳動機構上升(復位)時的準確停車,同樣,末限位保護位置開關是末限位位置開關的后備,作用是控制傳動機構下降時的準備停車。 

                  在脫機運行時,傳動機構應自動復位到初限位處,主機起動前,根據起動需要的阻值,傳動機構使動極板移動到一合適位置或初限位處允許起動,起動過程中,傳動機構按預定的程序下移(減小阻值),起動完成液阻切除后,極板自動復位到初限位處為下次起動作好準備。傳動機構中的拖動電機過載一般只作為警示信號,如用戶另有要求,也可作為分閘信號使主機停車。 (3)液阻的配制: 

                        首先將軟起動裝置活動極板調至允許起動狀態; 

                        打開電液箱蓋板,向箱內注入清潔的自來水至液位線以下約20mm處,將電解粉用溫水溶解后,正確連接電阻至電氣室內預留的AC6.3VAC24V測量電源,由圖三所示測量回路中RsU/I計算出實際配制的液體電阻值,在邊測量邊攪拌的情況下將溶解的電液適量注入電液箱中; 

                        所需Rs(Ω)值由下式確定  

                                式中:m-未串R前起動電流與額定電流之比,一般取4

                                n-串入R后起動電流與額定電流之比,取2.53               Ie-電機額定工作電流(A               Ue-電機額定工作電壓(V 

                  液阻配制完成后應確保電液箱的電液至口部液位線處,且液位狀態正常;

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