OPIO-MC3 10-41-01-01

39ME313V/F7

OPIO-MC3 10-41-01-01

45BM030HBC14

1、根據(jù)不同的電氣設(shè)備的供電方式選用不同的漏電保護(hù)器

　　單相220V電源供電的電氣設(shè)備，應(yīng)選用二極二線或單極二線式漏電保護(hù)器。

　　三相三線式380V電源供電的電氣設(shè)備，應(yīng)選用三極式漏電保護(hù)器。

　　三相四線式380V電源供電的電氣設(shè)備或單相設(shè)備與三相設(shè)備共用的電路，應(yīng)選用三極四線或四極四線式漏電保護(hù)器。

　　2、根據(jù)電氣線路的正常泄漏電流，選擇漏電保護(hù)器的額定漏電動作電流

　　選擇漏電保護(hù)器的額定漏電動作電流值時，應(yīng)充分考慮到被保護(hù)線路和設(shè)備可能發(fā)生的正常漏電流值。

　　選用的漏電保護(hù)器的額定漏電不動作電流，應(yīng)小于電氣線路和設(shè)備的正常漏電電流的大值的2倍。

　　漏電保護(hù)器的額定電壓、額定電流、短路分?jǐn)嗄芰?、額定漏電電流、分?jǐn)鄷r間應(yīng)滿足被保護(hù)供電線路和電氣設(shè)備的要求。

　　漏電保護(hù)器接線錯誤方式：

　　1、用于支線保護(hù)時，各支線應(yīng)有各自的專用零線，且兩相鄰支線路的零線不得相連。如果將兩分支線路相連，零線中的電流互流，破壞零序電流互感器內(nèi)的工作電流平衡，使漏電保護(hù)器發(fā)生誤動作。如果想就近利用動力分支線的零線作為照明分支線的零線，則會造成動力分支線的漏電保護(hù)器動作。

　　2、一個用電設(shè)備只能接在一條保護(hù)支路內(nèi)，不得跨接在兩條分支回路內(nèi)，不得接在零序互感器的前面，也不得采取一線一地制供電，否則，會導(dǎo)致漏電保護(hù)器誤動作。

　　3、裝有漏電保護(hù)器和未裝漏電保護(hù)器的用電設(shè)備，不得共用一個接地裝置。例如，當(dāng)電機(jī)M1的絕緣損壞而外殼帶電時，電機(jī)M2的外殼也帶電，由于電流沒有經(jīng)過漏電保護(hù)器，所以未起到漏電保護(hù)的作用。

數(shù)字電源有什麼好處它首先是可編程的，比如通訊、檢測、遙測等所有功能都可用軟件編程實(shí)現(xiàn)。另外，數(shù)字電源具有高性能和高可靠性，非常靈活。

　　4、單相負(fù)荷應(yīng)盡可能均衡分配。如果分配不均（如一相的線路偏長，設(shè)備集中），則負(fù)荷較重的一相，其漏電電流偏大，因而干線的三相不平衡漏電電流增大，達(dá)到一定值時就會使干線首端的漏電保護(hù)器動作。

多路復(fù)用器（MUX）則將在要測量的模擬輸入之間切換，并依次將每個輸入發(fā)送至ADC。

我公司主要經(jīng)營西門子abb,施耐德等國外多家品牌，產(chǎn)品涉及變頻器，儀器儀表，變送器，可編程控制器plc和人機(jī)界面。

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