Bertie Bezuidenhout

Consequence of Weaknesses in Power Quality

In the mid-1980s, I embarked on a mission to resolve persistent “power failure” complaints from the National Accelerator Centre (NAC) in Faure, Western Cape, now known as iThemba LABS—the largest accelerator facility in the Southern Hemisphere. Invited for private tours, I delved into their operations, even entering the high-stakes environment of the operating room. Witnessing

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Learn More About Rotating Voltage and Current Vectors

With our comprehensive Negative Phase Sequence Consulting Services, we deliver expert analysis and innovative solutions to effectively manage negative sequence currents in three-phase electrical systems. Our services are designed to identify and address issues caused by unbalanced loads, faults, and system abnormalities, ensuring system stability, reducing equipment wear, and significantly enhancing overall power quality. We

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Causes of Unbalanced Voltages and Currents

Practical imperfections which can result in unbalances are: A three-phase equipment such as induction motor with unbalance in its windings. If the reactance of three phases is not same, it will result in varying current flowing in three phases and give out system unbalance. With continuous operation, motor’s physical environment cause degradation of rotor and

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Learn the Hidden Impact of Untransposed Transmission Lines

Extremely long—hundreds of kilometers—untransposed high and extra-high voltage transmission lines with a flat, horizontal conductor configuration significantly contribute to negative-sequence voltages and, to a lesser extent, zero-sequence voltages. The incidence of negative-sequence voltages rises with increasing electrical load. In the late 1970s and early 1980s, Eskom operated two 400kV transmission lines to the Western Cape:

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