Questions About Outages & Power Quality
“Micro-outages” are caused by power quality problems. Usually, this results when large induction motors are turned on or off, causing a significant drop in power factor. Another cause is switching power supplies deployed by variable frequency drives (“VFD”). These VFDs can cause a significant amount of harmonics (noise) causing circuit breakers to trip. Lastly, and most insidiously, are problems originating from your incoming power. It could be a function of poor power factors or noise from a neighboring facility, or issues caused by intermittent renewable energy connected to the grid nearby.
No; these outages are much faster than an generator can start and pickup the load. Most micro-outages are shorter than 3 seconds. A fast start (NFPA 110-compliant) generator will take 10 seconds to accept load.