這個(gè)元件可以提供一個(gè)需要的延時(shí)動作特性與應(yīng)用電流的關(guān)系曲線或是可以用作一個(gè)簡單的定時(shí)限元件。接地電流輸入值是由接地輸入CT測量得的量值并且是基本相量或是有效值幅值。有兩種復(fù)位的方法:“瞬時(shí)”和“延時(shí)”(詳見反時(shí)限過流曲線特性部分)。當(dāng)元件被閉鎖，時(shí)間累計(jì)器將會依據(jù)相應(yīng)的復(fù)位特性復(fù)位。例如，如果元件復(fù)位特性設(shè)為“瞬時(shí)”并且元件閉鎖，時(shí)間累計(jì)器將會立即被清空。

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