Flicker is defined as fluctuation or wavering in visible light intensity due to voltage variations. These variations in voltage are caused by fluctuations in the load through the system source…
White Papers
Browse our library of power quality technical resources.
446 white papers
Understanding Total Harmonic Distortion
This paper discusses the causes of Total Harmonic Distortion, how it is calculated, measured, and how it can impact a power distribution system.
End-to-End Boomerang Cybersecurity
Power Monitors Inc.'s Boomerang voltage/current/power sensor, and Canvass, the web-based power quality analysis application is a system for gathering and analyzing data, especially over long periods of time. This long-term…
Steady State vs. Transient Harmonics
A harmonic analysis is a powerful method for analyzing waveform distortion, given the periodic nature of most nonlinear loads. Steady-state harmonic tools are sometimes extended for use with waveform events…
Four-Wire Delta Voltage Unbalance
Voltage unbalance in a four-wire or "high leg" delta can be tricky to measure. A 4-wire delta often involves unbalanced impedances, and phase shifts in the hot leg are common.…
Capturing Oscillatory Transients
Oscillatory transients are caused by switching operations, nearby lightning strikes, or other impulsive noise exciting electrical resonances present on the network. The most common in the distribution system is defined…
Power Quality Recorder Setup Basics
PMI recorders are capable of storing a large amount of data. The recording setup stored in the device determines the data that will be captured during a recording session as…
Power Transformer K-Factor
In this white paper I review K-factor in regards to power transformers, how K-factor is defined and calculated and how K-factor is used. K-factor is a way of rating or…
Disconnecting a Power Quality Recorder
This whitepaper covers the proper method used to disconnect power quality recorders and remove them safely from their location. Following the proper disconnection sequence eliminates or minimizes generating and recording…
Plotting PQ Events on the CBEMA – ITIC Curve
The CBEMA and ITIC curves are used to show voltage events. Some PMI recorders can record these events and then ProVision can be used to plot these events on the…
Stripchart Graphing in Canvass
The Boomerang is a device developed by Power Monitors for the purpose of allowing continuous monitoring of voltage, current, and power data. The Canvass web application and data storage service…
Per-Unit Analysis with ProVision
A per-unit scaling system simplifies many AC power analysis tasks. Eliminating transformer ratios, normalizing power values to equipment ratings, and allowing for like-to-like comparisons of differing nominals are just three…