Abstract:

In view of the shortcomings that the current residual current protection characteristic test device can’t fully meet the IC-CPD’s residual current protection characteristic test,this paper puts forward the research to meet the needs of IC-CPD’s residual current protection characteristic test device. Firstly,this paper compares and analyzes the current standards and test devices related to residual current protection devices,and makes clear the differences existing in IC-CPD’s residual current protection characteristic test;then it discusses in detail how to carry out circuit-loop design;then it studies and designs a digital waveform generation and power amplification scheme to meet IC-CPD’s composite wave residual current action characteristic test. The IC-CPD’s residual current protection characteristic test device designed in this paper has carried out the preliminary verification experiment,which meets the IC-CPD’s test requirements and makes up for the shortcomings of the existing test device.

Key words: IC-CPD, residual current, circuit-loop design, digital waveform