從電工測量儀表的分類開始學習常用電工測量工具

在電(dian)工技術領域里，電(dian)工測(ce)量儀表起著(zhu)十分重要的作用(yong)。

電(dian)(dian)(dian)(dian)工(gong)(gong)儀表的(de)(de)作用(yong)是測(ce)量各種電(dian)(dian)(dian)(dian)參數(shu)，如電(dian)(dian)(dian)(dian)流、電(dian)(dian)(dian)(dian)壓、周期、頻率、電(dian)(dian)(dian)(dian)功率、功率因數(shu)、電(dian)(dian)(dian)(dian)阻、電(dian)(dian)(dian)(dian)感、電(dian)(dian)(dian)(dian)容等(deng)。電(dian)(dian)(dian)(dian)工(gong)(gong)通過測(ce)量這些電(dian)(dian)(dian)(dian)參數(shu)數(shu)值，便可以了(le)解(jie)電(dian)(dian)(dian)(dian)路(lu)的(de)(de)電(dian)(dian)(dian)(dian)氣設備的(de)(de)技術(shu)性能和工(gong)(gong)作情(qing)況，以便進(jin)行適(shi)當的(de)(de)處理和必要的(de)(de)調整(zheng)，保證電(dian)(dian)(dian)(dian)路(lu)正(zheng)常工(gong)(gong)作和設備安全(quan)運行。因此，電(dian)(dian)(dian)(dian)工(gong)(gong)必須掌握(wo)常用(yong)電(dian)(dian)(dian)(dian)工(gong)(gong)儀表的(de)(de)原(yuan)理和使用(yong)方法。

電工測量儀表的分類

主要根據作用(yong)原理和用(yong)途來(lai)劃分。大家(jia)只需要了解一下即可。

按用途不同：可(ke)分(fen)為電(dian)(dian)壓表(biao)(biao)(biao)(biao)、電(dian)(dian)流表(biao)(biao)(biao)(biao)、功率表(biao)(biao)(biao)(biao)、電(dian)(dian)度表(biao)(biao)(biao)(biao)等(deng)；還可(ke)根據電(dian)(dian)流種類，分(fen)為直流表(biao)(biao)(biao)(biao)、交流表(biao)(biao)(biao)(biao)和(he)交直流兩用(yong)表(biao)(biao)(biao)(biao)等(deng)三種，還有(you)能聚(ju)測量電(dian)(dian)流、電(dian)(dian)壓、電(dian)(dian)阻(zu)等(deng)功能的(de)萬(wan)用(yong)表(biao)(biao)(biao)(biao)。

按作用原理：常用(yong)的有磁(ci)電(dian)式(shi)(shi)(shi)(shi)(shi)、電(dian)磁(ci)式(shi)(shi)(shi)(shi)(shi)、電(dian)動式(shi)(shi)(shi)(shi)(shi)和(he)感應式(shi)(shi)(shi)(shi)(shi)四種(zhong)，其(qi)它還有振動式(shi)(shi)(shi)(shi)(shi)、熱電(dian)式(shi)(shi)(shi)(shi)(shi)、熱線(xian)式(shi)(shi)(shi)(shi)(shi)、靜電(dian)式(shi)(shi)(shi)(shi)(shi)、整流式(shi)(shi)(shi)(shi)(shi)、光電(dian)式(shi)(shi)(shi)(shi)(shi)和(he)電(dian)解式(shi)(shi)(shi)(shi)(shi)等。

按測量方法：可分為直(zhi)讀(du)(du)式(shi)和比較式(shi)兩種。直(zhi)接指示被測量數值的(de)儀(yi)表(biao)(biao)，稱為直(zhi)讀(du)(du)式(shi)儀(yi)表(biao)(biao)，例(li)如(ru)電壓表(biao)(biao)、電流表(biao)(biao)、功率表(biao)(biao)等；被測量數值用“標準量”比較出來的(de)儀(yi)表(biao)(biao)，稱為比較式(shi)儀(yi)表(biao)(biao)，如(ru)平衡電橋、補償(chang)器等。此(ci)處的(de)電工(gong)儀(yi)表(biao)(biao)章節(jie)主要介紹直(zhi)讀(du)(du)式(shi)儀(yi)表(biao)(biao)。

按準確度：可分為0.1級(ji)(ji)(ji)(ji)、0.2級(ji)(ji)(ji)(ji)、0.5級(ji)(ji)(ji)(ji)、1.0級(ji)(ji)(ji)(ji)、1.5級(ji)(ji)(ji)(ji)、2.5級(ji)(ji)(ji)(ji)、和5.0級(ji)(ji)(ji)(ji)七種。0.2級(ji)(ji)(ji)(ji)儀(yi)表(biao)(biao)的(de)允許誤(wu)(wu)差(cha)為0.2%，0.5級(ji)(ji)(ji)(ji)儀(yi)表(biao)(biao)誤(wu)(wu)差(cha)為0.5%，以此類(lei)推。0.5級(ji)(ji)(ji)(ji)以上(shang)的(de)儀(yi)表(biao)(biao)準(zhun)確度(du)(du)較高(gao)，多用(yong)(yong)在實驗室作(zuo)為校驗儀(yi)表(biao)(biao)。1.5級(ji)(ji)(ji)(ji)、2.5級(ji)(ji)(ji)(ji)等準(zhun)確度(du)(du)較低(di)，一(yi)般裝(zhuang)在配電(dian)盤和操作(zuo)臺上(shang)，用(yong)(yong)來監視電(dian)器(qi)設(she)備允許情(qing)況。

發布時間:2021-12-3 訪問次數:1132