13
Instruction Booklet
IB01900001E
Effective August 2017
Instructions for Magnum DS Metal-Enclosed
Low-Voltage ARC Resistant Switchgear Assemblies
EATON
www.eaton.com
3.6.2.3 Connecting Additional Duct Sections
The duct will be provided and installed in sections of various lengths.
Each duct section will consist of 2 equal halves connected together.
Sections vary in 10” increments as shown in Figure 13.
Between each section, the connection brackets will be installed as
shown in Figure 13. Connect successive sections of duct using
¼-28 thread forming screws. The extension flanges on the duct con-
nection brackets will be attached to one portion of the duct and con-
nected on all four sides as shown.
The arc duct must be supported every 2 meters (78.7”). The weight
for 2 meters of duct is 220 lbs.
Figure 13. Arc Duct Connection Brackets.
3.6.2.4 Exhaust Duct Exit Door
The termination of the exhaust duct will be capped with a hinged
exit door (Figure 14). Under normal operating conditions, this door
shall remain closed and is held in place by a thread-cutter screw as
shown. In the event of an internal arc, pressure, gasses and debris
will be directed through the exhaust duct and out through the exit
door. The screw will break loose permitting the door to open.
WARNING
IT IS CRUCIAL THE THREAD-CUTTER SCREW IS PRESENT TO HOLD THE
DOOR CLOSED. USE OF ANY OTHER MEANS (I.E. BOLT AND WASHER) OR
REMOVAL OF THE INSTALLED SCREW WILL VOID THE ARC RESISTANT
RATING.
DANGER
THE TERMINATION LOCATION OF THE EXHAUST DUCT SHOULD BE
CAREFULLY CONSIDERED. DUE TO THE RISK OF EXTREMELY HIGH
TEMPERATURES, PRESSURES AND DANGEROUS GASSES ESCAPING
THROUGH THE EXIT DOOR, A FOUR-FOOT CLEARANCE ZONE IN ALL
DIRECTIONS IS STRONGLY RECOMMENDED TO REDUCE THE RISK OF
DEATH, SERIOUS INJURY AND/OR PROPERTY DAMAGE (FIGURE 16).
Figure 14. Exhaust Duct Exit Door Assembly.
Figure 15. Exhaust Duct Hood Assembly.
DWG NO
MODEL REV
SHEET OF
TITLE
ALL REV. NOTES
LISTED ON SHT. 1
REV
MODEL FILENAME
T.BLK
REV-4
A
25A3418
8
11
2
PLENUM WALL CUTOUT
25A3418G02.iam
1
OD
ON.
GASKET MATERIAL TO BE
APPLIED BETWEEN
WALL MOUNTED HOOD AND
MOUNTING SURFACE.
MATERIAL TYPE TO
SUIT APPLICATION.
