CACRSRCA30BBSY119

WA20P-3.0
S1C31192G01?

CACRSRCA30BBSY119

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

電話：15506917382??? 0591-62182535?

傳真：0591-22989937?? QQ：583745937? 聯(lián)系人：王工

福州卓凱電子科技有限公司

①當電氣設備發(fā)生漏電時，出現(xiàn)兩種異?，F(xiàn)象：

　　一是，三相電流的平衡遭到破壞，出現(xiàn)零序電流；

　　二是，正常時不帶電的金屬外殼出現(xiàn)對地電壓（正常時，金屬外殼與大地均為零電位）。

　?、诹阈螂娏骰ジ衅鞯淖饔寐╇姳Ｗo器通過電流互感器檢測取得異常訊號，經(jīng)過中間機構轉換傳遞，使執(zhí)行機構動作，通過開關裝置斷開電源。電流互感器的結構與變壓器類似，是由兩個互相絕緣繞在同一鐵心上的線圈組成。當一次線圈有剩余電流時，二次線圈就會感應出電流。

　　③漏電保護器工作原理將漏電保護器安裝在線路中，一次線圈與電網(wǎng)的線路相連接，二次線圈與漏電保護器中的脫扣器連接。當用電設備正常運行時，線路中電流呈平衡狀態(tài)，互感器中電流矢量之和為零（電流是有方向的矢量，如按流出的方向為“＋”，返回方向為“－”，在互感器中往返的電流大小相等，方向相反，正負相互抵銷）。由于一次線圈中沒有剩余電流，所以不會感應二次線圈，漏電保護器的開關裝置處于閉合狀態(tài)運行。當設備外殼發(fā)生漏電并有人觸及時，則在故障點產生分流，此漏電電流經(jīng)人體？大地？工作接地，返回變壓器中性點（并未經(jīng)電流互感器），致使互感器申流入、流出的電流出現(xiàn)了不平衡（電流矢量之和不為零），一次線圈申產生剩余電流。因此，便會感應二次線圈，當這個電流值達到該漏電保護器限定的動作電流值時，自動開關脫扣，切斷電源。

Mitsubishi A1SX80 MELSEC Input Unit

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CACRSRCA30BBSY119

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Gould AS-P371-002 Modicon Memory Module ASP371002 (Pack of 6) -

ELPRO 105S-4 Serial Telemetry Module

Allen Bradley 700-N400A1 Relay With 700-NT (Pack of 3) -

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Allen Bradley 812-C0A4 812C0A4 Control Circuit Series B -

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Allen Bradley 1772-LC Processor Interface Module Without Key

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Allen Bradley 1771-OAD Module 1771-0AD SD0SK7QR -

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Allen Bradley 1775-AC 6 Slot Chassis Rack 2 Board Connectors Without Key -

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