用于接地保护的电力电子集成模块的研制

Development of Power Electronic Building Block for Ground Protection

为了提高电气设备运行的可靠性和保证人身安全 ,基于分立元件研制了一种集接地保护和开关功能于一体的电力电子集成模块。模块有四个外接端子 ,模块中集成了检测电路、驱动电路和开关电路。该模块作为开关串接在电气设备的供电主回路中 ,可以保证只有当电气设备的外壳或电气设备内须接地的参考点接地时 ,才接通电气设备的供电电源。实验和应用证实 ,该模块是有效的。

To increase the reliability of electrical instrument and assure security of person. A power electronic building block of discrete compenents which integrates the functions of ground protection and switching function, was developed. This block has four connectors and three function cireuits, as detection circuit, drive circuit, and switching circuit. As a switch it can be concatenated in the main circuit of power supply. The power supply may be switched on, only if the shell of electrical instrument or the reference earth point in electrical instrument is connected with the earth. The experimental results and practical application show that building block effective.