关于泄漏电流的几点认识与探讨

Some Knowledge and Discussion about Leakage Current

按照国家标准GB4706.1-1998的要求,在家用电器领域取消了绝缘电阻的试验。本文从几个侧面论证了在家电领域使用绝缘电阻参数的局限性及不合理性,指明了用泄漏电流完全替代绝缘电阻在安全测试指标体系中的功能作用是更合理的;探讨性地提出了直流泄漏电流与交流泄漏电流之区分,指出直流泄漏电流与绝缘电阻这一指标的对应关系,探讨性地提出了与交流泄漏电流相对应的绝缘阻抗的概念,举例说明其在家电领域安全测试中的理论作用。

According to National Standard of GB4706.1-1998,Isolation Resistance test has been canceled in home appliance field. This article tries to explain the limitations and irrationalities of using isolation resistance in home appliance field from some factors and indicates that it is more rational to replace isolation resistance by leakage current test. The article explores the difference between the a.c leakage currentand d.c leakage current and finds the interaction between d. c leakage current and isolation resistance tries to present the concept of isolation impedance of relating a.c leakage current and explains the theoretical functions in safety test by examples.