Variable Frequency Drives and Short-Circuit Current Ratings

This data bulletin clarifies the terms and standards used in the industry, explains the thermal impact of PSCC values on VFDs, and provides VFD installation ratings information. This bulletin also includes discussion on when to specify or install line reactors or DC chokes, and the aspects of installing a VFD without using an enclosure. In addition, the reader will understand how the cost of a VFD installation is directly proportional to the SCCR level specified.

This document is current but may reference obsolete products.

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