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
Mill Duty Class 8503 Type Clapper type contactors
Class 8501 Type SZF Frequency Acceleration relays for plugging