Power quality analysis is a rapidly changing field, and is intrinsically linked to advances in digital technology. From its humble beginnings as analogue recorders that wrote a single voltage directly…
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The Basics of Power Quality Monitoring
PMI's line of power quality (PQ) monitoring tools can provide insightful information that can be used to detect industrial and residential power disturbances such as sags, swells, transients, waveform distortions,…
Checking IEEE 519 Compliance with ProVision
IEEE standard 519 was first released in 1982 and was then updated in 1992. It defines limits on total harmonic distortion (THD) as well as total demand distortion (TDD) with…
Understanding IEEE IEC Flicker Processing
Flicker measurement has improved dramatically with the advent of the flicker measurement techniques described in IEEE-1453/IEC61000-4-15. It is a feature found in many power quality monitors that makes flicker measurement…
Recording Harmonics
There are three primary recording types for harmonics in PMI recorders: stripcharts, daily profiles, and waveform capture harmonic analysis. Each of these has specific pros and cons, and setup considerations…
Strategies for Investigating Flicker
Investigating flicker issues with PMI recorders can be straightforward if the right data is collected, and analyzed with ProVision. By enabling and examining Pst and IFL flicker data, in addition…
Upgrading from WinScan to ProVision
As hardware improvements are made over time, the software that communicates with and controls that hardware must also evolve. Improvements in hardware, operating systems and most importantly, user feedback all…
Separating Transmission vs Distribution Events with Canvass
The combination of Canvass and Boomerangs strategically placed in a distribution system allows for a unique system-wide analysis of voltage trends. Analyzing voltage data from multiple locations in parallel reveals…
Threshold Configuration Settings in Canvass
The settings configuration window is a new feature in PMI's Canvass web software. It allows the user to set thresholds for each channel and measure supported by the recorder. When…
Vector Diagrams for Commonly Used Power Circuits
This white paper describes vectors and vector diagrams. It provides the vector diagrams and sketches of the connections required for correctly installing a power monitor on commonly used power circuit…
Analyzing Apparent and Reactive Power Using Canvass
Canvass, PMI's cloud-based data analysis portal, has recently been upgraded to provide the facilities for apparent and reactive power analysis for plug-in and meter-socket form 2S Boomerangs. This white paper…
Two Minute Countdown
Prior to recording, PMI recorders have a countdown interval of time used for initialization called the "Two Minute Countdown". This period of time is used to verify proper hookup, change…