Technical Data
Effective: May 1998Page 36
TD.44A.01.T.E
Cutler-Hammer
Magnum DS
Metal-Enclosed
Low-Voltage Switchgear
Features – Instrumentation/
Metering
Flexibility — Magnum DS Switchgear
allows for a variety of metering
options:
■ Analog switchboard type meters
such as ammeters, voltmeters, watt-
hour, power factor, etc.
■ Electronic power metering such as
the IQ family of Analyzer, DP-4000,
etc.
■ Instrument door mounted meters.
For feeder circuit instrumentation,
2% accuracy ammeters and amme-
ter switches can be mounted on the
secondary contact compartment
door between the breaker compart-
ment doors. The ammeters and
switches are immediately associ-
ated with definite breaker circuits.
Other devices, such as control push-
buttons, breaker control switches,
indicating lights, and test switches
can be mounted on these panels,
within space limitations.
Voltage Transformers — Voltage
transformers are rated 10 kV BIL and
are protected by both primary and sec-
ondary fuses. The primary fuses are of
the current limiting type.
Current Transformers — Current
Transformers for metering and instru-
mentation are mounted in the breaker
compartments and are front accessi-
ble. Secondary wiring between the cur-
rent transformer and the standard
shorting terminal block is color-coded
for ease of identification.
Control Power Transformers — Con-
trol transformers are provided when
required for ac control of circuit break-
ers, space heaters, and/or transformer
fans. Like voltage transformers, they
are protected by current limiting pri-
mary fuses. Non-current limiting fuses
are used on the secondary side to pro-
tect branch circuits.
Instrumentation – Door Mounted
Secondary Terminal Compartment
Door — Devices, such as control push-
buttons, breaker control switches, indi-
cating lights, and test switches can be
mounted on these panels, within space
limitations. The ammeters and
switches are immediately associated
with definite breaker circuits.
Instrument Compartment Door —
Devices, such as electronic power
metering and analog switchboard type
meters that do not fit on the secondary
terminal compartment door, are
Features – Accessories
and Options
Switchgear Accessories — Standard
accessories furnished with each Mag-
num DS Switchgear assembly include:
■ One breaker levering crank
■ Insulating covers or “boots” are fur-
nished on live main stationary dis-
connecting contacts in compart-
ments equipped for future breakers
■ Removable cover to block opening
in the door when the breaker is tem-
porarily removed from its compart-
ment
Optional Accessories
■ Traveling type circuit breaker lifter,
rail-mounted on top of switchgear
■ Floor running portable circuit
breaker lifter and transfer truck with
manual lifting mechanism. This
requires approximate 84-inch
(2134 mm) deep front aisle space
■ Test cabinet for electrically operated
breakers, with pushbuttons, control
cable and receptacle, for separate
mounting
■ Portable test kit for secondary injec-
tion testing and verification of trip
units. Utilizes standard 120 volt, 15
ampere, single-phase, 60 Hz supply,
available from any outlet
■ Additional removable cover to
block opening in the door when
breaker is temporarily removed
from its compartment
■ Removable insulating boots over
power cable lug adapters
Optional Switchgear Mounted Lifter
mounted on the Instrument compart-
ment door or on a the panel of a blank
cell.
Devices Mounted on Secondary Terminal
Compartment Door
Devices Mounted on Instrument
Compartment Door
www . ElectricalPartManuals . com
To Next Page
Loading...
