This article presents a couple of case studies where troubleshooting tools such as RF current probes and resistive probes proved effective in troubleshooting low-frequency conducted emissions. This paper overviews the issue of the low-frequency noise generated by electrical substations, from the experimental characterization of the source to the possible mitigation measures at the source, along the propagation path and at the receiver. Alongside the general presentation, a case study. In today's dynamic landscape of electric power transmission, control, and distribution, flicker issues have emerged as a critical challenge requiring the attention of skilled power quality engineers. When first installed, a piece of equipment can fail due to poor manufacturing, damage during shipping, or improper installation. Root causes of such noises include poor DC link design, lack of snubber circuit for the switches and. It consisted of following the manufacturers' recommendations about how to take care of equipment at predetermined intervals of time or usage, with checks intended to reduce the probability of failure or deterioration in system operation. That new trend was called preventive maintenance. Maintenance. Distribution boxes are the unsung heroes of our electrical systems, quietly managing power until something goes wrong. When they start tripping, overheating, or making strange noises, it's more than just an inconvenience - it's your home's cry for help. In this guide, we'll walk through these.