The Schneider Electric VW3A66717 is a dynamic braking (DB) resistor designed for use with Altivar variable-frequency drives. It dissipates regenerative energy from a decelerating motor as heat, preventing drive overvoltage faults and enabling controlled stopping — essential for high-inertia loads like centrifuges, conveyors, or fans that coast longer than the drive's internal bus can absorb.
Integration Note
Mount the resistor in a well-ventilated location clear of heat-sensitive components and cable trays. Use the supplied mounting bracket or a DIN-rail adapter if specified for the drive frame.