9
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
MaGnuM PRoDuct GuiDe
CA013002EN—April 2017 www.eaton.com
61
Technical data and endurance information for installation
•
Recommended electrical clearances
The following electrical clearance information is provided
as guidance when installing drawout or fixed breakers in
an enclosure . Refer to the graphic representations and the
associated dimensional tables .
Table 27 . ANSI Electrical clearance dimensions (in)
breaker
mounting
enclosure
dimensions
to
insulated
surface
to grounded
metal
surface
With cell
switch or
key lock
Drawout
A
0
0
0
B
1.0
1.0
1.0/2.9
Fixed
A
5.9
9.8
-
B
1.2
2.8
-
Table 28 . IEC Electrical clearance dimensions (mm)
breaker
mounting
enclosure
dimensions
to
insulated
surface
to grounded
metal
surface
With cell
switch or
key lock
Drawout
A
0
0
0
B
25
25
25/75
Fixed
A
150
250
-
B
30
70
-
•
Recommended enclosure size/ventilation
Graphics of typical enclosures with associated dimensions
are provided as guidance for breaker enclosure designs
with respect to the enclosure size and required amounts of
ventilation space .
Recommended enclosure electrical clearances inches (mm)
Minimum enclosure size/ventilation
Do not block
vent openings in
Drawout Cassette
4.0 (100)
Cell switch
(optional)
Key lock
(optional)
A
B
A
H
D
W
V
Top or rear
vent open area
V
Rear or bottom
vent open area
W - Cassette width
+3.0 in
+75 mm
H - Height
21.7 in
550 mm
D - Front compartment depth
17.7 in
450 mm
V - Ventilation (800-3200A)
25 in
2
160 cm
2
Ventilation (4000-6300A)
50 in
2
320 cm
2
