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VFD Long Lead Effects on Motor Windings Technical Bulletin

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This document explains how long lead lengths between Variable Frequency Drives (VFDs) and motors can cause voltage overshoot, reflected waves, and motor winding failures due to the fast switching of IGBTs. It provides technical formulas for critical lead length, discusses the corona effect on insulation, and offers solutions such as using inverter-duty motors, output reactors, and minimizing conductor length to under 150 feet.

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