ABB has released its ultra-low harmonic (ULH) drives, designed with built-in harmonic avoidance systems and complying with IEC 61000-3-12, IEEE 519 and G5/4 harmonics recommendations.

With ABB’s ULH drives, the problems caused by harmonics are avoided in the first place offering excellent built-in performance technology, including an active supply unit and integrated low harmonic line filter. External harmonic filters or multi-pulse transformers are not needed meaning significant savings in installation footprint.

The ULH drive produces exceptionally low harmonic content and exceeds requirements set by low harmonic standards. Compared to a conventional drive, the harmonic content is reduced by up to 97%. With the total harmonic current distortion typically being 3%, with a passive filter, the typical total harmonic distortion is between 5-10%.

The compact drive features built-in harmonics mitigation. This includes an active supply unit and a low harmonic line filter. As there is no need for external filters, multi-pulse arrangements or special transformers, the simple installation offers significant space, time and cost savings.

As there is less risk of overheating with lower harmonic currents, there is no need to over-dimension equipment such as transformers and cables.