The DNP3 protocol was originally developed back in the day when a wired connection to devices was the norm. The protocol was designed to be robust and very reliable but…
Products
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,…
Power Quality with the Significant Change Graph
The Significant Change graph shows single cycle measurements, with one second resolution in a single graphical time series trace. This graph of the triggered Significant Change record type is especially…
Easy to Use Harmonic Graphs in ProVision
Harmonic distortion is an increasingly common power quality problem, and one of the most complex to analyze. Going beyond the total harmonic distortion to assess each individual harmonic takes time,…
Migrating ProVision to a New Computer
Given the rate at which technology and computers are improving, sometimes it is necessary to phase out an existing system in favor of a newer one. However, if the previous…
Types of Boomerang Units
This white paper is a technical explanation of the form, fit and function of Boomerang PQ monitors. These units are intended to assist utility companies in troubleshooting and maintaining their…
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…
Histogram Statistics in Canvass
Histograms in Canvass are powerful, yet underused graphs. In addition to presenting measured data visually, a list of histogram statistics are also computed by Canvass. Histogram graphs in Canvass compute…
Networking the Ethernet Boomerang
PMI's Ethernet Boomerang monitors can be powered over Ethernet for real-time voltage, current, and power monitoring. The Ethernet Boomerang allows quick connection and communication over a company's network, without incurring…
New Graph Templates for Distributed Generation
The use of distributed generation (DG), e.g. photovoltaic and wind farm systems, presents new challenges to the electric network. Unpredictability and sudden changes in generated power results in changes in…
Detecting Recloser Events with Boomerang Monitors
Boomerangs provide advanced triggering mechanisms that can be used to detect and send an alert for Recloser events. A "Voltage Low Low" event will be used to trigger an alert,…
Finding the Source of Harmonic Problems
This white paper explores the feasibility of using a common measurement point between the source and load to determine the source of harmonics using only harmonic phase angle. Finding the…
