Identifying the sources for voltage sags can be a somewhat complicated task. Graphs such as waveform capture can obscure the essentials with an RMS-based voltage sag. PMI provides a triggered…
Products White Papers
Power quality white papers on Products.
282 white papers in Products
New ProVision Release for Handling Large PQ Recordings
With the introduction of the cell Guardian, 1 GB of memory in a PQ recorder is increasingly common. Although the resulting large files can provide a wealth of data, they…
CBEMA-ITIC Analysis with Stripcharts
The ITIC curve (formerly CBEMA) is a performance-oriented standard for electronic equipment manufacturers. The standard gives a method for classifying and plotting voltage events on a specially constructed graph that…
Recording for NEC 220 Compliance
Utility customers who are expanding operations or adding load must comply with National Electric Code Article 220 to determine if any electrical upgrades are needed. Many customers will ask the…
Sharing Cloud Based Data
Canvass provides a cloud-based system for gathering, storing, and analyzing voltage, current, and power data from Boomerangs and Revolutions. In large deployments, with hundreds or thousands of devices, it's more…
THD Waveform Capture Triggering
The simplest waveform capture triggering is based on RMS voltage or current changes. While sufficient for voltage sags, recloser operations, etc., more complex events such as cap bank switches, narrow…
Measuring Current: Best Practices
PMI supports two types of current probes for measurements: Rogowski coil and iron-core clamps. Their distinct properties and characteristics need to be considered in a particular situation to better the…
CBEMA Graphs Revealed
The CBEMA (Computer Business Equipment Manufacturers Association) curve and the ITIC (Information Technology Industry Council) curve both refer to a similar method to visibly represent voltage events. A graph of…
Real-Time Voltage Interruption Detection and Alerting
Utility situational awareness is critical with today's high customer expectations, increased regulatory scrutiny, and reliance on stable AC power. Voltage interruption/outage detection is the most basic, and usually the most…
Advanced Harmonic Analysis Through Bulk ProVision Exports
The IEEE 519-2014 harmonic standard calls for several advanced data analysis procedures. Some of these, especially when combining with data from other devices, may be performed in Excel or Matlab.…
Detecting Loose Neutrals with a Receptacle PQ Monitor
Loose/open neutrals can present a dangerous and even life-threatening situation in a residential service. The classic voltage symptoms suggesting this condition are one single-phase leg rising in voltage, the other…
PQ Recording Templates
This whitepaper describes the use and customization of PQ recording templates in PQ Canvass, iPowerPad, and in the ProVision software. PMI recording devices can be initialized with many different configurable…
