Voltage Regulation Basics Utilities are generally required to ensure the delivered steady-state voltage is within the limits specified in ANSI C84.1. Persistent under- or over-voltage can result in customer complaints…
Power Quality White Papers
Power quality white papers on Power Quality.
206 white papers in Power Quality
Transferring ProVision Recordings to PQCanvass
We've added a major enhancement to ProVision - the ability to sync recordings with PQ Canvass, PMI's cloud-based PQ data analysis system. The implications of this are profound because you…
Power Factor vs Displacement Power Factor: What’s the Difference?
True power factor (PF) and displacement power factor (DPF) are commonly available on power analyzers and loggers. At first glance (and in some situations), they appear to measure the same…
PMI PQ Ruler
PMI's PQ Ruler is packed with power quality formulas, industry standard limits, tolerance curves, and engineering reference material in the form of a handy 6" ruler. Here the information is…
Waveform Capture with Transient Capture Overlays
PMI Revolution recorders can record waveform captures and, with the transient capture option, high-speed microsecond-level transient captures. Transient captures have a much higher sampling rate than waveform captures but have…
Voltage Sags in Photovoltaic Systems
Photovoltaic (PV) generation is electrically in parallel with the utility supply, and thus lowers the steady-state system impedance. The ideal result is a reduction in locally caused voltage sags as…
Understanding Arc Fault Breakers
Arc Fault Breakers (or AFCI breakers) are sensitive breakers that augment traditional breakers' functionality by using logic and signal processing to determine whether or not an arcing condition is present.…
Understanding Harmonic Power
Harmonic power is a complex and often misunderstood topic. This leads to misinterpretations, including using a harmonic power analysis when the measurements aren't physically meaningful. An overview of harmonic power…
An Overview of IEEE 1250 – Guide for Identifying and Improving Voltage Quality in Power Systems
The IEEE 1250 standard was developed in response to the introduction of modern electronics onto an older electrical grid. These newer electronics were not necessarily built to withstand the traditional…
Skin and Proximity Effect on Power Transmission
This paper describes what skin effect and proximity effect are, how they influence electric power transmission, and what steps are taken to reduce their losses.
Getting Started with Harmonics
Harmonic distortion has become an increasingly important subject for large power consumers. Non-linear loads continue to be adopted into customer systems, which often are the root cause of power quality…
Merging Recordings in ProVision
Many PQ investigations end with a follow-up recording to verify a problem has been corrected and to gather a baseline for any further issues. Analyzing the “before” and “after” recordings…
