Research on Arc Trace of Switch on Load Breaking Based on LabVIEW

Abstract

Abstract In recent years, there are more and more electrical fire cases caused by the arc damage to the contact when the switch is breaking, so more attention is paid to the research of the arc trace when the switch is breaking with load. In this paper, starting from the analysis of switch breaking arc, the calculation method of three-phase and first open phase switch breaking arc is studied, and the arc trace test and analysis system is established based on LabVIEW. This system is used to test and study the distribution law of contact breaking arc trace of AC contactor under different opening phase angle, breaking current and breaking load test conditions, and the relationship between switch breaking arc trace and breaking area is given. Through the prototype test, a large number of test data are stored in the system database, which provides the test data and test basis for the design of high-performance switchgear, and also provides technical support for the real-time tracking, judgment and warning of product quality by using the historical data law in the operation process of low-voltage electrical circuit, so as to avoid causing electrical fire.