Waveform Capture data is often the most detailed information available in a PQ recording. Getting good data is not always easy, so it's important to glean all information possible from…
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83 results by Chris Mullins — Clear
New Graph Templates for Flicker Analysis
Voltage flicker is one of the most visible and common residential complaints, yet one of the most challenging to quantify and address. The IEEE 1453 flicker standard defines some important,…
Voltage Optimization with the Boomerang and Canvass
The Boomerang voltage sensor and Canvass software are essential pieces in a successful Voltage Optimization system, providing the long-term reporting needed for verification and system tuning, while also providing real-time…
New Graph Templates for Interharmonics
Analyzing interharmonic data is a complex process, due to the large amount of information recorded. ProVision 3D graphs help for quickly identifying specific interharmonics that merit a closer look, but…
Power Quality with the Significant Change Graph
The Significant Change graph shows single cycle measurements, with one second resolution in a single graphical time series trace. This graph of the triggered Significant Change record type is especially…
Easy to Use Harmonic Graphs in ProVision
Harmonic distortion is an increasingly common power quality problem, and one of the most complex to analyze. Going beyond the total harmonic distortion to assess each individual harmonic takes time,…
Loose Neutral Graph Template
A "flickering lights" customer complaint may be the first symptom of a dangerous loose/open neutral. Loose neutrals can cause high voltage equipment damage, and in extreme cases, excessive current flow…
New Graph Templates for Distributed Generation
The use of distributed generation (DG), e.g. photovoltaic and wind farm systems, presents new challenges to the electric network. Unpredictability and sudden changes in generated power results in changes in…
Understanding Parametric Graphs
Parametric graphs present a little-seen view of load waveforms. By graphing the current waveform against the voltage, a voltage-independent load signature can be established. This is useful for characterizing load…
Recording Harmonics
There are three primary recording types for harmonics in PMI recorders: stripcharts, daily profiles, and waveform capture harmonic analysis. Each of these has specific pros and cons, and setup considerations…
Estimating THD with PF and DPF
True power factor (PF) and displacement power factor (DPF) are commonly available on power analyzers and loggers. Although useful on their own, together they can help estimate current THD, even…
Understanding Harmonics
With the increase in nonlinear loads (VFDs, high efficiency heat pumps, electronic power supplies, etc.) and the reduction in excess distribution capacity, harmonic distortion is an increasingly common power quality…