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時間繼電器

怎樣根據設備電壓選擇搖表？

發布日期：2022-04-17 點擊率：118

　　搖表的額定電壓，應根據被測電氣設備的額定電壓來選擇。

　　500V以下的設備，選用500V或1000V的搖表。額定電壓在500V以上的設備，應選用1000V或2500V的搖表。瓷瓶、母線等，應選用2500V---5000V的搖表。

　　搖表選擇不當，如電壓選得過低，則測得結果不準確;電壓選得過高，有可能損壞設備的絕緣。此外，選擇搖表時，還應注意它的測量范圍與被測的絕緣電阻數值相適應，以免引起過大的讀數誤差。

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