Investigation of EMI Effect of Arc Welding on Startup Instrumentation

Abstract

The tests described in this paper were conducted to characterize the effects that electromagnetic interference (EMI) from arc welding, has on startup instrumentation (SUZ). This paper reviews the results of a literature search on EMI resulting from arc welding and gives the objective and scope of the tests conducted and describes the test equipment and setting, and test procedure and results. Arc-welding-related EMI levels in an SUI system were measured to determine the dominant source of interference, the coupling path and the susceptible pan of the SUI system. The effectiveness of easily implemented improvements in reducing the level of EMI in the SUI system were also tested. Recommendations are provided on how to eliminate or reduce the EM1 effects on sensitive nuclear instruments.