熱繼電(dian)器(qi)的檢測元件(jian)是雙金屬片(pian)，由于起動電(dian)流及過載等過流沖擊，很容易(yi)使(shi)雙金屬片(pian)產(chan)生疲勞(lao)效(xiao)應，造

成刻(ke)度(du)值偏(pian)移(yi)，動作(zuo)不穩定，且這在(zai)生產現場卻較難發現，后造

成過載(zai)不動作。而電子式電機保護器由

于檢測元件(jian)采用電(dian)流互感器，不存在發熱問題，其動作穩定(ding)性與熱繼電(dian)器相比有(you)了質(zhi)的飛躍(yue)

電(dian)(dian)機(ji)保(bao)護(hu)(hu)器主(zhu)要是斷線保(bao)護(hu)(hu)，三(san)(san)相(xiang)(xiang)(xiang)(xiang)電(dian)(dian)動機(ji)正常情況是三(san)(san)相(xiang)(xiang)(xiang)(xiang)具備平(ping)衡的，如果缺相(xiang)(xiang)(xiang)(xiang)，另外兩相(xiang)(xiang)(xiang)(xiang)電(dian)(dian)流增大，很快(kuai)就會(hui)燒毀線圈(quan)。有了電(dian)(dian)機(ji)保(bao)護(hu)(hu)器，當三(san)(san)相(xiang)(xiang)(xiang)(xiang)電(dian)(dian)流不平(ping)衡時到一(yi)定(ding)程度時，零序保(bao)護(hu)(hu)就會(hui)動作，讓電(dian)(dian)動機(ji)停止(zhi)運(yun)行，避免燒毀線圈(quan)。

一． 產品概述

1.產品特點

本(ben)產品是一(yi)種智能型(xing)電(dian)源保(bao)(bao)護(hu)器(qi)件，采用(yong)微控制器(qi)和數(shu)字處理技術，軟啟(qi)動器(qi)FT-ZR-600KW配置參數(shu)，集(ji)電(dian)壓顯(xian)(xian)示(shi)、過欠壓保(bao)(bao)護(hu)、缺相(xiang)保(bao)(bao)護(hu)、相(xiang)序保(bao)(bao)護(hu)和計時計次功能于一(yi)體，中文液晶(jing)顯(xian)(xian)示(shi)，具有操(cao)作簡(jian)便、體積(ji)小(xiao)巧、可靠(kao)性高等特點(dian)。

2.適用范圍

本產(chan)品可(ke)廣泛應用于各種低壓電器控(kong)制系(xi)統，替代(dai)傳統的相序繼電器和過(guo)欠壓保護器。

電(dian)(dian)(dian)動(dong)機(ji)(ji)(ji)(ji)保護器(qi)由三(san)相(xiang)電(dian)(dian)(dian)流(liu)(liu)互感(gan)器(qi)、檢測(ce)、放大、、調整(zheng)電(dian)(dian)(dian)路(lu)(lu)和執行繼(ji)電(dian)(dian)(dian)器(qi)組成。檢測(ce)電(dian)(dian)(dian)路(lu)(lu)檢測(ce)到電(dian)(dian)(dian)流(liu)(liu)互感(gan)器(qi)感(gan)應的電(dian)(dian)(dian)流(liu)(liu)缺(que)相(xiang)或大于設定(ding)值(zhi)時，經放大器(qi)放大，使繼(ji)電(dian)(dian)(dian)器(qi)動(dong)作(zuo)(zuo)。繼(ji)電(dian)(dian)(dian)器(qi)觸(chu)頭串接(jie)于接(jie)觸(chu)器(qi)線圈供電(dian)(dian)(dian)回路(lu)(lu)中(zhong)，繼(ji)電(dian)(dian)(dian)器(qi)動(dong)作(zuo)(zuo)后使接(jie)觸(chu)器(qi)斷(duan)電(dian)(dian)(dian)，起(qi)到保護電(dian)(dian)(dian)機(ji)(ji)(ji)(ji)作(zuo)(zuo)用(yong)(yong)。電(dian)(dian)(dian)路(lu)(lu)用(yong)(yong)于避開電(dian)(dian)(dian)機(ji)(ji)(ji)(ji)起(qi)動(dong)電(dian)(dian)(dian)流(liu)(liu)，其時長(chang)可調。調整(zheng)電(dian)(dian)(dian)路(lu)(lu)用(yong)(yong)于根據(ju)被保護電(dian)(dian)(dian)機(ji)(ji)(ji)(ji)工作(zuo)(zuo)電(dian)(dian)(dian)流(liu)(liu)設置動(dong)作(zuo)(zuo)電(dian)(dian)(dian)流(liu)(liu)。

過流和(he)過壓。綜合(he)保護器(qi)配合(he)交流接(jie)觸器(qi)使(shi)用，【在正常工作(zuo)的線(xian)路中】保護器(qi)有四個接(jie)線(xian)柱，1，2是電源與接(jie)觸器(qi)線(xian)圈并聯(lian)(lian)，3，4是開關(guan)，串聯(lian)(lian)在控制回路中即可。再用表測額定電流，調適保護器(qi)檢測電流，已達到預期的效果