LED (Light-Emitting Diode) based lighting has been around for a little over 20 years and it continues to take over more and more of the general lighting market. The technology…
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Power Quality
Introduction to Voltage Transients
Transients due to nearby lightning or switching events can cause degradation or failure of almost any electrical equipment. Impulsive transients can pass through transformer interwinding capacitance to appear on the…
Analyzing Power Quality Data with Python
Power Monitors provides a range of software tools for power quality analysis, including ProVision, Canvass and PQ Canvass. These general-purpose tools are built towards facilitating the most common types of…
Recommendations for Voltage Sags
Voltage sag is one of the most common power quality problems. The consequences for not troubleshooting a voltage sag complaint isn't the resulting damage that can be done to electrical…
Advanced Waveform Analysis Using Python
PMI provides a suite of powerful power quality analysis software packages, from ProVision – the primary desktop offering – to Canvass and PQ Canvass, both web-based products, all well-suited for…
ProVision Recording Templates
This white paper covers the creation and use of predefined recording templates in ProVision. PMI recording devices can be initialized with a number of configurable settings. Configurable settings include recording…
Power Quality in Traffic Signal Cabinets
The first electric traffic signals were installed over 100 years ago but now are a ubiquitous aspect of modern life. Today's intersections are far more complex, with a cabinet of…
Feeder Resonance
Substation circuit loads are mostly inductive, dominated by distribution transformers and large motors. Canceling a portion of this inductance with Power Factor Correction capacitors (PFCs) improves power factor by reducing…
An Overview of Harmonics and Power Quality
Harmonic distortion is a broad, complex power quality issue with significant economic impacts for electric utilities and end users. Distorted current waveforms from end-user loads create excessive heating for utility…
Tips on Transformer K-factor
Transformer loading is ultimately limited by internal heating caused by load current flow. Some heating is caused by resistive losses in the transformer winding. Another important heating source is eddy…
RMS Measurements and Harmonic Analysis
The RMS value is used to quantify the overall "size" of a waveform with a single number. By extension, harmonic amplitudes can be used to describe a complex waveform with…
Transferring ProVision Recordings to PQCanvass
We've added a major enhancement to ProVision - the ability to sync recordings with PQ Canvass, PMI's cloud-based PQ data analysis system. The implications of this are profound because you…
