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…
White Papers
Browse our library of power quality technical resources.
408 white papers
DNP3 Point Map 2.0 Update
The Boomerang family of cell-connected distribution monitors continues to expand. This expansion includes updated hardware, added features and new capabilities. These changes along with customer input have driven the need…
Case Study: Spotting Pump Failure with a Boomerang and Canvass
In September of 2017 a homeowner discovered that his well was not delivering water. The suspicion was that the pump itself was in some way failing – perhaps the motor…
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…
Managing Outages with Canvass and PQ Canvass
Responding to outage management is of the utmost importance to any utility, but you can't respond to a voltage interruption that you don't know about. Deploying an Outage Management System…
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…
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…
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…
Live PQ Waveforms in a Web Browser
PQ Canvass is the next generation of online power quality analysis tools provided by PMI. This new cloud service offers enhanced graphing, a full suite of PQ analysis tools, recording-based…
Separating Voltage Sags from Steady State Voltage Readings
Ensuring that service voltage is within ANSI limits is a basic but important step in delivering power. Sophisticated programs such as Conservation Voltage Reduction (CVR) and volt/VAR optimization require continuous…
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…
