电气火灾是由非人为因素引起的,若能提前预警,则可有效避免火灾发生.传统电气火灾预警方法是对剩余电流幅值进行监测,其无法准确预警剩余电流引起的电弧电气火灾.对剩余电流电弧故障的特征信息进行了研究,提出了电弧型电气火灾的监测方法.该方法通过判断剩余电流高频信号峰值来进行调整,若超出整定值则预警.结果表明,该方法可克服传统监测法的漏报缺陷,提高预警系统的可靠性.%Electrical fire is not caused by human factors; it is possible to be effectively avoided by earlier warning.The traditional wanting method is to monitor the amplitude of the residual current,it is unable to precisely forecast the arc-type electrical fire caused by residual current.Thus the feature information of the fault of residual current is researched,the proper monitoring method for arc-type electrical fire is proposed.This method makes the issue warning through judging the peak value of the high frequency signal of the residual current,and issue warning when it exceeds the setpoint.The result indicates that the method overcomes the under reporting defects and enhances the reliability of the fire warning system.
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