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斷路器合閘電阻的作用上海人民電氣有限公司概述

2020/12/1 14:11:04      點擊:

斷路器合閘電阻的作用:

電力系統中的投、切空載線路,會產生操作過電壓。為此,要在斷路器上裝設合閘電阻,釋放電網的能量,從而保護電網電氣設備。

合閘電阻在主斷口(滅弧室)合閘前的幾個毫秒投入,在主斷口合上若干毫秒后自動切除。

合閘電阻作用是斷路器在斷開時在主觸頭合上前先退出,在合閘時合閘電阻先投入,當主觸頭合上時被短接退出,這樣做可以防止操作過電壓。

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