Analysis of recordings of distributed generation (e.g. solar, wind, etc.) systems present new challenges for utilities. Distributed generation analysis usually involves looking at voltage and power, voltage and voltage THD,…
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Using TLAR CTs
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…
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…
Five Methods to Determine the Source of Harmonics
Harmonics are "Non-Linear" current or voltage in an electrical system. Any waveform that deviates from a perfect sine wave has harmonics. Any non-linear load draws harmonic currents and therefore produces…
Predictive Power Monitoring
Power Quality Monitoring data can be used to detect and identify potential problems either before equipment begins to fail or before it fails completely. Symptoms recorded by PQ monitors can…
Networking the Ethernet Boomerang
PMI's Ethernet Boomerang monitors can be powered over Ethernet for real-time voltage, current, and power monitoring. The Ethernet Boomerang allows quick connection and communication over a company's network, without incurring…
Detecting Recloser Events with Boomerang Monitors
Boomerangs provide advanced triggering mechanisms that can be used to detect and send an alert for Recloser events. A "Voltage Low Low" event will be used to trigger an alert,…
SNTP Configuration for the Revolution
PMI's Revolution power quality recorders are available with Ethernet/networking capabilities which are easily configurable to allow quick connection and communication over a company's network. One of these network capabilities is…
Two Minute Countdown
Prior to recording, PMI recorders have a countdown interval of time used for initialization called the "Two Minute Countdown". This period of time is used to verify proper hookup, change…
Understanding Vector Diagrams
This whitepaper will discuss what vector diagrams are, what they display, and how PMI's power quality recorders and ProVision can provide the user with this information.
Measuring Abnormal Voltage
The Abnormal Voltage Report is one of the "Triggered Event" reports in ProVision and it is used to determine whether voltage drifted outside the thresholds during the recording session. Usually…
Understanding Telephone Interference Factor
Harmonic distortion that is produced from power conversion systems can cause interference on analog telephone lines. The degree of telephone interference can be expressed in terms of the Telephone Interference…