An artificial network for emission tests in the frequency range 2–9kHz

Starting from general requirements for repeatable measurements and correct assessment of current emissions which originate from low-voltage (LV) apparatus in the range 2–9 kHz, this paper proposes an artificial network (AN), addresses its manufacturing criteria and reports test results gained with a first prototype. The AN is expected to be connected between the test voltage (230 V/50 Hz), e.g. the common LV supply system, and the equipment under test (EUT). It comprises only three resistors, three reactors and one capacitor in each phase and causes only small losses. Moreover, the dampening of distortions in the range 2–9 kHz by the AN is high in both directions. Therefore, this circuitry both isolates the EUT from distortion of the power source and preserves the power quality of the supply system.