Solar Inverter Harmonics in South Africa Solar inverter harmonics South Africa is now a bigger issue on industrial and commercial sites. Many facilities have added rooftop PV to reduce grid dependence and control electricity bills. But solar inverters also add harmonic current to electrical networks. When that happens, the site may see overheating, unstable power factor, nuisance trips, and weak p...
Medium Voltage Harmonic Filters: A Complete Selection Guide Medium voltage harmonic filters help industrial facilities, renewable energy plants, utilities, and infrastructure projects control harmonic distortion in their electrical systems. Harmonics can reduce power quality, increase equipment losses, create overheating, and interfere with normal system operation. A correctly designed harmonic fi...
Installing a capacitor bank should improve power factor, reduce reactive power demand and release capacity in transformers and cables. However, some facilities find that their power factor remains below the utility target even after the capacitor bank has been commissioned. This does not necessarily mean the capacitor bank is defective. The cause may be incorrect sizing, changing loads, harmonic d...
A facility can operate normally on utility power and develop power quality problems after transferring to a standby generator. Drives trip, UPS systems report input faults and lights flicker—even though the load has not changed. Nonlinear loads are usually already generating harmonic current. The generator provides a weaker source, allowing the same current distortion to create greater volta...
Transformer Overheating Explained: Why It Happens Below Rated Load A transformer can run unusually hot even when the connected load appears safely below its nameplate rating. Current may seem acceptable while winding or enclosure temperatures continue rising. This often happens because loading is assessed only in kilowatts or average amperes. Harmonics, imbalance, poor power factor and inad...
Even‑Order Harmonics Are Silent Killers – Here’s How Active Harmonic Filter Delivers the Cure Most power quality discussions focus on odd harmonics like the 3rd, 5th, and 7th. But even‑order harmonics – 2nd, 4th, 6th, and beyond – are equally dangerous, often more damaging, and far harder to eliminate with traditional passive filters. They creep into your system from rectif...
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