This white paper defines the differences between Real Power, Reactive Power, and Apparent Power in terms used by the power distribution industry. Here the relationships between these different types of…
White Papers
Browse our library of power quality technical resources.
446 white papers
Understanding Harmonics
With the increase in nonlinear loads (VFDs, high efficiency heat pumps, electronic power supplies, etc.) and the reduction in excess distribution capacity, harmonic distortion is an increasingly common power quality…
Introduction to Electric Vehicle Systems
This paper, the first of a multi-part series, covers the fundamentals of electric vehicle charging stations, charge modes, plug configurations, levels, and basic operation. Electric vehicles, although very efficient, are…
Net Metering in ProVision
ProVision offers a wide variety of reports and graphs for displaying various types of power quality data. One of these is the power consumption report. Newly added to this report…
In Place Updating with ProVision
ProVision, the power quality data analysis software provided by PMI, is constantly modified to meet the changing needs of engineers and technicians, and to ensure compatibility with other hardware and…
Using Loss of Periodic Load to Trigger Email Alerts
Boomerang triggering mechanisms are most often used for voltage monitoring, detecting overcurrent/high load conditions, or complete loss of load. However, the advanced triggering features in the Boomerang allow for more…
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…
Annotations in ProVision
ProVision offers many different graphing options, which allow different types of power quality data to be presented for examination and analysis. In addition to presenting the graph, ProVision also includes…
UDP vs TCP on a Cellular Network
The Boomerang family of wireless monitors all utilize a cellular modem to provide a remote data connection. This makes remote monitoring very convenient but it does require the installer to…
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…