Experimental study on sensitivity detection technology of series arc fault with complex loads

When the arc fault occurs in the power supply system, the overcurrent and leakage current protection are not enough to detect the arc fault. AFDD (Arc Fault Detection Device) has not been popularized in China, and the protection is only for specific load, or the use of a single place, resulting in uneven product quality. In this paper, the core detection tests of the mainstream AFDD in the market were carried out in the standard content, and the sensitive performance of the test products was compared and analyzed through the response time and perspective current of the test products. In the case of complex loads and loops, the influence of load complexity and arc fault location on the performance of AFDD detection was explored, and some improvement methods and suggestions were put forward for the existing standard detection test contents.