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三相四线制电能表一相反向计量的原因分析

Rongjie HAN,Ding JIN,Liguo WENG,Kai MA

Moder Architecture Electric（2017）

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Abstract
针对三相四线制电能表其中一相出现反向计量问题,对运行设备进行全面检查,结果发现三相动力开关有一相接线螺丝扣错位松动,造成严重过热,并有放电痕迹.故障处理后,电能表恢复正常计量.理论分析进一步证实,电能表反向计量为开关一相接触不良所致,为防止放电引起火灾或烧毁用电设备,应加装三相电压保护.
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