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Analyzing Apparent and Reactive Power Using Canvass

Category: PMI Products, Canvass, Meter Sockets

Analyzing Apparent and Reactive Power can be challenging without the right tools.


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 will briefly describe what each of these measurements are, how they are calculated and how to analyze them within the Canvass system. 


The single phase Form 2S and 120V plug-in Boomerang can measure RMS voltage, and with the current option, RMS current and real power. These values are measured as 1 second averages, and every few minutes a compressed block of 1 second readings are sent from the Boomerang to Canvass. The result is that Canvass has complete second-by-second trend data for RMS voltage, current, and real power.


Canvass has been upgraded to compute reactive power (VARs) and apparent power (VA) from the raw incoming data, and provide that as stripcharts just like the original data (Figure 1). These stripcharts are equivalent to the Boomerang sending data, but without incurring the extra cell usage costs to send redundant information. In addition, reactive and apparent power are available for any historical data where RMS voltage, current, and real power have already been logged in Canvass.


This White Paper Includes:

  • Reactive Power (Volt-Ampere Reactive/VAR)
  • Apparent Power (Colt-Ampere/VA)
  • How VA and VAR are Computed in Canvass
  • Graph Availability
  • Viewing a Reactive or Apparent Power Graph

Download White Paper Here