Class 6421 AC Dynamic Lowering Control Panel

For use with ac wound rotor motors on crane hoist without mechanical load brakes. All controllers are arranged for use with rectifier operated DC shunt brakes or solenoid operated ac brakes.



  • Uses single phase motor connection for dynamic lowering

  • Suitable for applications not requiring slow lowering speeds

  • Mill Duty Class 8503 Type Clapper type contactors

  • Class 8501 Type SZF Static Acceleration Timers

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