LF Mains Immunity Test Set up
An LF mains immunity test setup was developed beyond the requirements of IEC 61000-4-16 as the mains voltages, assumed 50/60 Hz can be superimposed with an LF signal in the frequency range 20 Hz to 20 kHz (with 1 kW source power).
Microwave oven filament filter
Instead of using expensive HV filter components a FBGF was made in FR-4 materials capable to withstand an insulation voltage of 10 kV.
TF-mains network + attenuation
A high power TF-blocking filter was developed for theater/on stage applications. Shown is a 150 Amp./phase filter design performance.