Class 6417/6418 AC Variable Frequency Control

For use with AC squirrel cage or wound rotor induction motors in open or closed loop systems. These drives may be used for crane travel and hoist motions. May be used with AC solenoid or rectifier operated brakes, and with power and control circuit limit switches. Controls are rated for 50°C as standard. The Class 6417/6418 AC drive system is suitable for new installations or for retrofit of existing electromechanical control.

Class 6420 Reversing EDDYMAG® Hoist Control Panel

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

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.

Class 6422 Contra-Torque® Hoist Control Panel

For use with ac wound rotor motors on crane hoists without mechanical load brakes but with fixed overhauling loads such as bucket crane hoists. Controllers are arranged for use with rectifier operated DC shunt brakes or solenoid operated ac brakes.

Class 6426 Reversing Plugging Control

For use with ac wound rotor motor on hoist and travel drives of general purpose overhead cranes. The hoist controllers are of the reversing hoist type and are used on cranes with mechanical load brakes. The travel panels are of the reversing plugging type. Both the hoist and the travel controllers are arranged for use with rectifier operated DC shunt brakes or solenoid operated AC brakes.

Class 6435 With Square D® Class 8502 Type S Contactors

For use with ac wound rotor motor on hoist and travel drives, of general purpose overhead cranes. The hoist controllers are of the reversing dynamic lowering type when used on cranes without mechanical load brakes and are of the reversing hoist type when used on cranes with mechanical load brakes. The travel controllers are of the reversing plugging type. Both the hoist and the travel controls are designed for use with rectifier operated DC brakes or solenoid operated AC brakes.

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