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…
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161 results for “Revolution” — Clear
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…
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…
Understanding Variable Frequency Drives
This paper covers what a variable frequency drive (VFD) is, the different types of VFDs, their functions, and their benefits. Also covered are issues related to VFDs, some solutions to…
Hardware for Power Quality and Distribution Monitoring
PMI offers an array of monitoring devices for just about any utility distribution monitoring need. Data needs, location, and communications requirements are all factors involved in selecting the right monitor…
Software to Diagnose Power Quality Issues
Data analysis is the key to understanding and solving engineering problems on the distribution system. PMI offers three types of software tools to speed the analysis process, and help manage…
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.
Adjusting Waveform Capture Sampling Rates
Waveform capture is one of the most important data types available for PQ analysis. The sample-level data provides detailed information for voltage disturbances such as oscillatory transients, notches, sub-cycle overvoltages…
Voltage Notching Effects on Harmonic Distortion
Notching is a voltage waveform distortion resulting from short-duration high current pulses. These distortions typically present themselves graphically as a “notch” in the time domain representation of the waveform. The…
Flicker Investigation Strategy
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…
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…
