Study in Plug-Socket Loose Contact Tests and Fire Trace Identification Technology Thereof

Simulation tests of two failure patterns, including reduction of static contact area and contact vibration of plug and socket, are carried out in this research. Based on simulation tests, fire traces caused by loose contact are extracted and investigated by using some technical approaches including macroscopic analysis, SEM analysis, surface component analysis, metallographic analysis and so on. Finally, the technical approaches and criterion for identifying fire traces caused by loose contact of plug and socket are proposed.