Hubbell Industrial Controls, Inc.
4292
Lifting Magnet Controllers
Type 4292 Compact Controller for Scrap Yards
Specification/Price Sheet • August 2008 • Replaces Jan 2008
Description
The Type 4292 Yard-
Automatic
Discharge
Type
master
Controllers
incorporated heavy-duty
time proven components
arranged to provide
optimum control of your
lifting magnets.
Controllers
The Type 4292 Yardmaster
Automatic Discharge Type
Lifting Magnet Controller
provides a fast and clean
release of mag-net loads
by applying full voltage
reverse current to the
magnet. The full voltage
re-verse current feature
permits the operator to
promptly return for another
lift.
A mechanically rugged
high thermal capacity
discharge
varistor
assembly is permanently
connected in parallel
with the magnet and
provides
a
safe dis-
charge path for the
stored magnetic energy.
With Yardmaster mag-
net 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.
The drop contactor is
under the control of the
operator’s Master Switch
and the dis-charge sensor
Features
•
•
•
•
Automatic Discharge
Rated 250 VDC @ 5-100 amps
Front-Wired Front-Removable components
module (DSM).
When
Mechanically interlocked “Lift”and “Drop”
NEMA rated mill duty contactors
the operator’s Master
Switch signals the magnet
•
Permanently connected 700V discharge
path completely independent from the
line that protects magnet and generator controller to drop the load,
•
•
High-Thermal capacity varistor discharge
path
the “Lift” contactors (L)
open. The stored magnet
Peak magnet induced voltage limited to
energy is dissipated in the
dis-charge 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
applyingfullvoltagereverse
cur-rent to the magnet and
begin the adjust-able time
reverse current cycle. After
the completion of the timed
reverse cycle the drop
relay and drop contactor
are deenergized.
under 700 Volts
Application
•
•
•
•
Long electrical contact life
Minimum Maintenance
Dribble control - Standard
The Type 4292 Yard-
master Controllers are
suited for many uses
from light scrap handling
to the handling of heavy
billets or plates. It may
be used with all types
and makes of DC lifting
magnets.
Ventilated indoor/outdoor NEMA 3R
enclosure
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