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電能表的作用和類型

發布日期：2022-10-09 點擊率：79

電能表是專門用來測量電能的儀表，由于電能的單位是度和千瓦·時，所以電能表又叫電度表或千瓦時表。電能表之所以能測量電能，是因為它的內部有一個計度器也叫積算儀，它能把負載在某一段時間內消耗的電能自動累計起來。

    目前，交流電能的測量大多采用感應式電能表，這種儀表的轉動力矩大，成本低，是一種應用廣泛的電工儀表。

    (1)按電能表的結構及工作原理不同，可分為感應式機械電能表和電子數字式電能表兩種，其中感應式機械電能表數量多，應用最廣。

    (2)按電能表測量的相數不同，可分為單相電能表和三相電能表。目前，家庭用戶基本是單相電能表，工業動力用戶通常是三相電能表。

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