Hubbell Switch 4292P User Manual

Hubbell Industrial Controls, Inc.  
Lifting Magnet Controllers  
4292P  
Type 4292P Compact Controller for Scrap Yards  
Specification/Price Sheet • August 2008  
YARDMASTER PUP  
Description  
The Type 4292P Yardmaster Pup Controllers incorporate heavy-duty time proven components arranged to provide  
optimum control of your lifting magnets.  
A mechanically rugged high thermal capacity discharge varistor assembly is permanently connected in parallel with  
the magnet and provides a safe discharge path for the stored magnetic energy.  
With Yardmaster Pup magnetic controllers induced voltage cannot return to the line, permitting rectified power  
supplies to be used without the added expense of special protective loads or bypass circuits.  
Features  
• Automatic Discharge.  
• Rated 5-50 amps DC.  
• High-Thermal capacity varistor discharge path.  
• Peak magnet induced voltage limited to under 700  
volts.  
• Long electrical contact life.  
• Minimum maintenance.  
• Front-Wired, Front-Removable components.  
• Mechanically interlocked “Lift” and “Drop”  
• NEMA rated mill duty contactors.  
• Permanently connected 700V discharge path  
completely independent from the line that protects  
magnet and generator.  
• Dribble control standard on 115V & 230V controllers.  
• Ventilated Indoor/Outdoor NEMA 3R Enclosure.  
Application  
The Type 4292P Yardmaster Pup Controllers are suited for many uses from light to medium scrap handling  
applications. They may be used with all types and makes of DC lifting magnets.  
Automatic Discharge Type Controllers  
The Type 4292P Yardmaster Pup Automatic Discharge Type Lifting Magnet Controllers provide a fast and clean  
release of magnet loads by applying full voltage reverse current to the magnet. The full voltage reverse current  
feature permits the operator to promptly return for another lift.  
The drop contactor is under the control of the operator’s Master Switch and the Discharge Sensor Module (DSM).  
When the operator’s Master Switch signals the magnet controller to drop the load, the Lift contactors (L) open. The  
stored magnet energy is dissipated in the discharge varistor. When the discharge voltage declines to approximately  
300V, the DSM energizes the Drop Relay (DR) which in turn enables the Drop Contactor (D) to close applying full  
voltage reverse current to the magnet and begins the adjustable time reverse current cycle. After completion of the  
timed reverse current cycle the drop relay and the drop contactor are de-energized.  
 

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