Low distortion loads correct harmonics within devices such as which of the following?

Low distortion loads correct harmonics within devices such as which of the following?

• A. programmable logic controllers
• B. solid-state relays
• C. DC to AC power inverters
• D. low THD rectifiers

Answer: (D)

Harmonic distortion comes from non-linear loads drawing currents that aren't a clean sine wave. A load that minimizes its own harmonic content helps keep the system’s waveform cleaner. A rectifier specified as low THD is designed to draw current with minimal harmonic content, meaning it reduces harmonics on the line and within the device itself. The other options—programmable logic controllers, solid-state relays, and DC-to-AC inverters—can introduce harmonics through switching unless they’re specifically filtered or designed to be very clean, so they aren’t described as low harmonic distortion loads. So the best example of a device that corrects or minimizes harmonics is a low THD rectifier.

Harmonic distortion comes from non-linear loads drawing currents that aren't a clean sine wave. A load that minimizes its own harmonic content helps keep the system’s waveform cleaner. A rectifier specified as low THD is designed to draw current with minimal harmonic content, meaning it reduces harmonics on the line and within the device itself. The other options—programmable logic controllers, solid-state relays, and DC-to-AC inverters—can introduce harmonics through switching unless they’re specifically filtered or designed to be very clean, so they aren’t described as low harmonic distortion loads. So the best example of a device that corrects or minimizes harmonics is a low THD rectifier.