Magnetek (Menomonee Falls, WI) has announced the IMPULSE® Series 4 adjustable frequency drives. The IMPULSE•G+ can be used as open-loop vector or V/F crane control for traverse motions or mechanical load brake hoists, and the IMPULSE•VG+ can be used as a closed-loop flux vector crane control for non-mechanical load brake hoists and traverse motions. The drives incorporate Load Check II™ that continuously detects hoist overload conditions throughout the frequency range, halting upward motion and only allowing the load to be lowered.

The IMPULSE® Series 4 adjustable frequency drives.
An Adaptive Ultra-Lift™ feature allows for hoist operation above base speed with a light load or empty hook. It continuously monitors torque and adjusts motor speed. Safe Torque Off provides a redundant hardware safety circuit that ensures motor and brake power are removed when an E-STOP switch or safety controller opens the drive input.

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