Explain the process of conducting a power quality audit, including selecting measurement points and analyzing collected data.

A power quality audit is a systematic assessment of the electrical system to identify, analyze, and resolve power quality problems. The process begins with a preliminary site survey to understand the system's configuration, load characteristics, and any known power quality issues. Selecting appropriate measurement points is crucial. Key locations include the service entrance, points of common coupling (PCC) with other loads, locations with sensitive equipment, and areas where power quality problems are suspected....