Virtual Instrumentation Applied to Electromagnetic Compatibility Testing

This paper focuses in the development of an electromagnetic compatibility test system for voltage dips immunity and supply current harmonic distortion. Voltage dips analysis is a complex stochastic issue, since it involves a large variety of random factors, such as: type of short circuits in the power system, location of faults, protective system performance and atmospheric discharges. On the other hand, harmonic distortion is a steady state disturbance which is caused by the rectifier employed in energy-efficient technology. This paper describes a system for voltage dips testing according to IEC 61000-4-11 norm and it also test the supply current harmonic distortion according to the limits given in IEC 61000-3-2. Results of the dips test are represented in a power acceptability curve obtained with the test levels of the norm; the harmonic distortion is represented in a bar chart compared with the IEC 61000-3-2 limits.