Water utilities require reliable solutions securing the flow of water and wastewater. The ACQ580 drive for water is part of ABB’s all-compatible drives portfolio. This robust drive is designed to secure optimal operation of water and wastewater pumps, while ensuring low energy consumption. Intended for the United States
Tech Note 089: THHN wire for HVAC and water drives
THHN wire is sometimes used on the output side of a VFD, between the drive and motor. While ABB allows THHN to be used for HVAC and water VFDs, we do not recommend it be used. This technical note reviews the concerns of THHN wire along with other solutions that are more appropriate for use with a VFD.
The technical note reviews the evolution of the UL 508C standard and the harmonization to the new UL 61800-5-1 standard. Specifically, the changes to the investigation and testing requirements for Power Conversion Equipment and the resulting impact on ratings for short circuit current (SCCR).
This document compares and contrasts IEC contactors with NEMA contactors for use in a VFD package. IEC contactors are acceptable for most most VFD bypass packages that are applied to pump and fan applications.