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…
Products
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…
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…
Getting Started with the NMS
The NMS (or Network Management Software) is a lightweight Java Desktop Application produced by PMI for the bulk configuration of Boomerang voltage/current/power monitors. This document aims to provide the user…
Estimating THD with Power Factor Histograms
In the previous whitepaper Estimating THD with PF and DPF, a technique for estimating THD was shown given power factor and displacement power factor stripchart data. In many case, there's…
Case Study: Electric Tankless Water Heaters and Power Quality
In this case study, an investor-owned utility responded to a residential customer complaint. The root cause was a newly installed electric tankless water heater, requiring a transformer upgrade beyond the…
Canvass and Cybersecurity
Canvass is PMI's web-enabled distribution system monitoring and analysis platform. Deploying Canvass as a web application provides a wide array of benefits: one installation base (no need to push updates…
Using the Revolution Mounting Bracket
The PMI mounting bracket provides a variety of methods to temporarily or permanently attach a Revolution or 3-phase Boomerang to a metal enclosure, mounting plate, or many other points. Internal…
Electric Tankless Water Heaters and Power Quality
In this whitepaper the basics of electric tankless water heaters (TWHs) are presented, along with their potential impact on voltage quality. Real-world graphs are discussed to illustrate the significant impact…
Hidden Delta Voltage Unbalance
Voltage unbalance can cause severe heating in motors and large DC power converters. Although most voltage unbalance is caused by unequal loading among phases, shifts in voltage phase angle can…
