Eaton Magnum DS Technical Data Manual - Cutler-Hammer
Technical Data
Effective: May 1998
Page 33
TD.44A.01.T.E
Cutler-Hammer
Through the Door Design — The fol-
lowing functions may be performed
without the need to open the circuit
breaker door: levering the breaker
between positions, operate manual
charging system and view the spring
charge status flag, close and open
breaker, view and adjust trip unit and
read the breaker rating nameplate.
Through-the-Door Design
Front Accessible — When the door is
open or removed each breaker com-
partment provides front access to
isolated, vertical wireways, primary
disconnects, cell current transformers
and other breaker compartment acces-
sories for ease of field wiring and
troubleshooting field connections.
Breaker Cell
Magnum DS
Metal-Enclosed
Low-Voltage Switchgear
Four Position Drawout — Breakers can
be in connected, test, disconnected or
removed position. The breaker com-
partment door can be closed in the
connected, test and disconnected
positions.
Closing Spring Automatic Discharge
Mechanical interlocking automatically
discharges the closing springs when
the breaker is removed from its com-
partment.
Optional Safety Shutters — Positive
acting safety shutters which isolate the
breaker connections to the main bus
when the breaker is withdrawn from
the cell is an option offered for addi-
tional safety beyond our standard
design. Insulating covers (“boots”) are
furnished on live main stationary dis-
connecting contacts in compartments
equipped for future breakers.
Breaker Inspection — When with-
drawn on the rails, breaker is com-
pletely accessible for visual inspection;
tilting is not necessary. The rails are
permanent parts of every breaker
compartment.
Interference interlocks are supplied on
breakers and in compartments where
the compartments are of the same
physical size to assure an incorrect
breaker cannot be inserted.
Key Interlock (Switchgear Mounted)
Breaker can be stored in compartment,
and completely removed for mainte-
nance or for use as a spare without dis-
turbing the interlock. No modification
of the breaker required. This mecha-
nism holds the breaker mechanically
trip-free to prevent electrical or manual
closing. An additional single cylinder
breaker mounted key interlock is also
available as an option.
Optional Mechanical Interlock —
Available between adjacent breakers.
Features – Structure
Standard Finish — Gray paint finish
(ANSI 61) using a modern completely
automated and continuously moni-
tored electrostatic powder coating.
This continually monitored system
includes spray de-grease and clean,
spray rinse, iron phosphate spray coat-
ing spray rinse, non-chemical seal,
oven drying, electrostatic powder
spray paint coating and oven curing.
Integral Base — The rugged formed
base greatly increases the rigidity of
the structure and reduces the possibil-
ity of damage during the installation of
the equipment and is suitable for roll-
ing, jacking and handling. A lifting
angle is permanently welded into the
bus compartment structure for
increased strength.
Heavy Duty Door Hinges — Each
breaker door is mounted with hinge
pins. Removal of the door is easily
accomplished by just lifting the hinge
pin. This allows easy access to the
breaker internal compartment for
inspection and maintenance.
Heavy Duty Hinge Pins
Rear Cover/Doors — In Magnum DS
Switchgear standard rear covers with
captive hardware are the bolt-on type.
They are split into two sections to facil-
itate handling during removal and
installation. Optional rear doors are
also available.
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