電擊防護用剩余電流動作保護器電流保護范圍分析
李光曦,吳英
(中信建筑設(shè)計研究總院有限公司,湖北 武漢 430014)
摘 要:根據(jù)IEC 標(biāo)準(zhǔn), 計算了人體不同電流路徑對應(yīng)的安全電流閾值,分析了電流通過人體的效應(yīng)。通過比較電流對人的效應(yīng)與無延時型剩余電流動作保護器(RCD) 的動作時間/ 電流特性,得出了現(xiàn)有配電設(shè)計中采用的RCD 不能滿足全電流范圍段保護的結(jié)論,提出了從電流波形入手,研發(fā)具有甄別電擊波形能力的RCD,提高RCD 的保護精度,減少誤動作等改進要求。
關(guān)鍵詞:剩余電流動作保護器;額定剩余動作電流;電擊防護;附加保護
中圖分類號:TM561 文獻標(biāo)識碼:B 文章編號:1007-3175(2017)01-0061-04
Current Protection Range Analysis of Residual Current Device for Protection Against Electric Shock
LI Guang-xi, WU Ying
(CITIC General Institute of Architectural Design and Research Co., Ltd, Wuhan 430014, China)
Abstract: According to the IEC standard, this paper calculated the safety current threshold value of different current path of human body and analyzed the effect of the current through human body. By comparing the effect of current on human body with the action time-current characteristics of no delay residual current device (RCD), this paper concluded that the RCD used in the existing current distribution design could not meet the requirement of the full current range protection. It is suggested that starting from the current waves, the RCD with the ability to discriminate electric shock waves will be developed to raise the protection precision of the RCD and to reduce malfunction etc.
Key words: residual current device; rated residual operating current; protection against electric shock; additional protection
參考文獻
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