In water and wastewater facilities, as well as many continuous duty industrial pumping systems, power quality is not an abstract requirement. It affects motor heating, transformer loading, and the stability of backup power systems.
To address these practical constraints, the AS3U series combines an AS3 adjustable speed drive with an integrated passive harmonic filter in a UL® Type 1 free‑standing enclosure. This factory‑integrated solution reduces upstream harmonic distortion while simplifying installation by eliminating the need for additional filters.
At full load, the AS3U is designed to limit total harmonic current distortion to 5 percent or less, helping support overall system compliance with IEEE 519 standards. This integrated approach also reduces wiring complexity and commissioning time compared to multi‑component solutions.
Stable Power for Critical Pumping Loads
Low harmonic current reduces electrical stress on motors, transformers, and backup power systems, supporting reliable operation in continuous duty pumping environments.
Energy‑Efficient Operation Across Load Profiles
The AS3U delivers 96 percent or greater efficiency with THDi of 7 percent or lower at loads of 50 percent and above, making it well-suited for variable flow pumping applications.
Simplified System Architecture
With the passive harmonic filter integrated at the factory, the AS3U helps eliminate external filters, related wiring, and coordination effort.
For more information about the AS3U low voltage adjustable speed drive or to discuss specific application requirements, please email TIC-Service@toshiba.com.
About Toshiba International Corporation
Toshiba International Corporation, a Toshiba America Inc. Group company and a wholly owned subsidiary of Toshiba Corporation, is comprised of a diverse range of divisions and business units, including Motors & Drives, Power Electronics, Automotive Systems, Transmission & Distribution, Transportation, Digital Solutions, and Quantum Secure Networking.
Headquartered in Houston, Texas, Toshiba International Corporation provides application solutions for a broad range of industries, including energy, mining, general industrial, data centers, automotive, and medical. For more information, visit https://toshiba.com/tic.
About Toshiba International Corporation’s Motors & Drives Division
Toshiba International Corporation’s Motors & Drives Division offers a full range of low and medium voltage motors, adjustable speed drives, motor controls, vacuum contactors, vacuum circuit breakers, PLCs and instrumentation products. Recognized for their quality, performance, and durability, these products can be customized to meet the requirements of demanding industrial applications.
