TLARs are PMI's iron core CT (Current Transformer) clamps, available in various probe and channel configurations. These clamps are used for lower range current measurements, with ranges of 20A or…
Products
Voltage and Current Scaling in Canvass
The ability to store and apply multiplicative scaling factors to voltage, current, and power data is a new feature recently added to the cloud-based Canvass system. Scale factors have a…
Motor Start-Up from All Angles
ProVision has a multitude of graphs available that are great for analyzing the various aspects of motor startup and the PQ issues that arise while operating these devices. Using an…
Using Scale Factors for PT/CT Ratios & Per-Unit Analysis in ProVision
Raw voltage, current, and power signals applied to a PQ recorder are often scaled versions of the true data under question. Transducers such as PTs and CTs step the voltage…
Photovoltaic Monitoring with Canvass
The use of distributed generation has witnessed a dramatic increase over the past decade. The two most popular of these – solar and wind – provide a unique set of…
Introduction to Harmonic Bar Charts
The presence of harmonics in the voltage delivered to homes and businesses is pretty much a given due to the increase in non-linear loads in use today. These loads include…
Getting Started with the 3-Phase Boomerang
The 3-phase Boomerang sends continuous voltage, current, and power information to Canvass, PMI's cloud-based data analysis package. The Boomerang and Canvass provide web-based graphing of 3-phase stripchart, daily profile, and…
Getting Started with Stripchart Analysis in ProVision
Stripchart data, also known as trend or interval data, is often the most important information in a power quality recording. The bulk of the recorder memory is dedicated to it,…
Voltage Unbalance with Canvass
Voltages are rarely perfectly balanced in three-phase systems. Although small unbalances are not usually a problem, if this unbalance becomes too great then the unbalance can cause problems especially for…
Using the Properties Panel to Enhance Graphs and Annotations
The properties panel in ProVision is a feature that is often overlooked but can greatly enhance the utility of graphs when preparing them for reports and presentations. By changing the…
Oscillatory Transient Ring Frequency
This white paper provides details on how to estimate ring frequency caused by resonances formed between power corrections capacitors and inductive loads using ProVision. Waveform data captured using PMI's Eagle…
Voltage Notching in IEEE Std. 519-2014
In this white paper, I cover the new IEEE Std 519-2014 limits for voltage notching, how these limits are calculated, and how to use ProVision to make the notch measurements.…
