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Power Factor Correction: Why One Machine Needs Capacitors and the Other Doesn’t
A machine builder measured two tube-bending machines with a rented logger. Both had a poor power factor, for two different reasons. Real data, two power factor numbers, and why capacitors fix one machine and not the other.
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Rogowski Coil Accuracy and Calibration: What Affects Measurements?
Rogowski coils are popular because they make current measurement much easier. They can be wrapped around large cables and busbars, installed in tight spaces, and used for high-current measurements without interrupting the conductor. But once the coil is installed, the obvious question is how accurate the measurement actually is. This is why two measurements taken…
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Meatrol Mi550 vs Fluke 1736/1738: Three-Phase Power Logger Comparison
The Meatrol Mi550 and the Fluke 1736/1738 are portable three-phase power and energy loggers used for load profiling, energy audits, solar PV sizing and power quality screening. Both log voltage, current, power, power factor, energy and harmonics up to the 50th order, and both meet IEC 61000-4-30 Class S. The practical difference: the Mi550 is…
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Power Factor Formula: How to Calculate Power Factor (With Examples)
Power factor is the ratio of real power to apparent power: PF = kW ÷ kVA. A reading of 1.0 means all supplied power does useful work; below roughly 0.9–0.95, most network operators start charging penalties. To calculate it, measure real power (kW) and apparent power (kVA) with a power analyser and divide. The Invoice…
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Using logged energy consumption data to plan solar and backup power system
To size a commercial solar or backup power system correctly, log the site’s actual consumption — per-phase power, peak kVA, and power factor — for at least one full operating cycle. Measured data exposes phase imbalances and true peak demand that utility bills hide, preventing undersized inverters and overcapitalised arrays. Designing solar and backup systems…
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Solar Self-Consumption Analysis with PVSyst: Importing and Analyzing Consumption Data
Solar self-consumption analysis is essential for anyone looking to maximize the value of their solar PV system. As feed-in tariffs have declined and the value of exporting electricity to the grid has dropped, analyzing and optimizing how much solar energy you use on-site has become crucial.
