Abstract

High-speed protective devices in modern datacenters, such as low-voltage circuit breakers with electronic trip units (ETUs) offering instantaneous or short-time protection, are documented to operate in cases where standard Power Quality (PQ) records show no corresponding voltage sag, swell, or sustained waveform distortion. Post-event analysis often indicates nominal RMS voltage and current at the time of operation, leading such events to be characterized as “nuisance” or “mysterious” trips despite confirmed protective operation.