This whitepaper is a continuation of WP241 (Recorder Setup Basics). In part one the details and relative memory consumption of interval recording was discussed along with the associated controls for…
White Papers
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446 white papers
Recording Interharmonics with the Revolution
Interharmonics are on the rise because of large non-linear loads and sources being introduced to the distribution network, in particular large Variable Frequency Drives (VFDs) and inverters for distributed generation.…
IEEE 519 Harmonics in Residential Locations
IEEE 519 specifies the measurement technique and limits for harmonics in a wide variety of locations, from transmission through distribution. For the first time, the 2014 edition also provides separate…
Voltage Sag Source: Upstream or Downstream?
The first step in voltage sag mitigation is finding the source of the sag. In a power quality recording, spotting the voltage sag itself is often easy, but determining whether…
Power Factor Correction Capacitors and Harmonics: How PFC Capacitors Affect Harmonic Levels
Power networks have become increasingly more complex with the rapid growth of non-linear loads. These additions place significant burden on a network, resulting in a reexamination of today's installations. This…
Cell, WiFi, and More with the New Cell Guardian Meter Socket Recorder
PMI has just introduced a major redesign of the Guardian meter socket power quality analyzer. This white paper will focus specifically on the new Cell Guardian recorder and cover the…
Configuring Alerts with a Guardian in PQ Canvass
PQ Canvass is Power Monitors Inc.’s newest iteration of web-based power quality analysis software. It builds on the foundation established by Canvass and adds many new features, including variable-interval stripcharts;…
Introduction to PQ Canvass
Power Monitors has released a new cloud-based software product for power quality analysis, called PQ Canvass. PQ Canvass incorporates the features and convenience of our previous online software, Canvass, many…
Understanding RMS Measurements
Power Monitors, Inc. provides a wide array of power quality test instrumentation. These devices are used to measure line voltage, current and power from or to a number of different…
Computing IEEE 519-2014 Short Time Harmonic Values
IEEE 519-2014 specifies two time periods for analyzing harmonic data: "very short time", or 3 seconds, and "short time" or 10 minutes. For achieving the best resolution, the 3 second…
Electrical Undervoltage and Power Quality
In this whitepaper, the term undervoltage is explained, some typical causes of undervoltages are given, and the effects of undervoltage on customer loads is described. IEEE 1159-2009, IEEE Recommended Practice…
Data Collection During Quick Fluctuations in Line Voltage
One of the most useful methods for examining specific power quality activity is through filtered predesignated reports. At PMI we've achieved this with our "Significant Change Report." The primary use…