变频冰箱引起GFCI跳闸的原因分析和解决方案探讨

doi:10.19784/j.cnki.issn1672-0172.2019.04.005

Abstract

Abstract: This paper studies the cause of GFCI (ground fault circuit interrupter) trip caused by refrigerator with inverter: In addition to being sensitive to power frequency leakage current, GFCI is also sensitive to higher frequency leakage current, which can trigger GFCI trip. The common mode voltage with high dv/dt generated by the inverter circuit, through the distributed capacitance between the compressor drive line and power line, also through the distributed capacitance between the stator winding and the compressor shell, became high frequency leakage current, and GFCI tripping is triggered. Two countermeasures can solve the GFCI trip problem: One is to separate the compressor drive line and the power line in the refrigerator case. The other is to apply a filter to the power line in the compressor cabin.

Key words: Inverter circuit, GFCI, Filter, Leakage current

REN Guobing. Cause analysis and improvement of GFCI trip caused by refrigerator with inverter[J]. Journal of Appliance Science & Technology, 2019, 0(4): 59-63.

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Cause analysis and improvement of GFCI trip caused by refrigerator with inverter

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[1]	UL 943-Fourth Edition-2006.02.01 UL Standard for Safety for Ground-Fault Circuit-Interrupters[S].
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