3 Installation and Wiring
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28
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3
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Cabinet with fan on the top
Air inlet of front
door
Insulation
barrier
Ventilation airflow
Cooling fan
MD500 (450 kW)
Figure 3-12 Cabinet with fan on the top
Table 3-3 Specication of cabinet with fan on the top
MD500 Model
Quantity
of Fans
Total Air
Volume
(CFM)
Effective Area of
Cabinet Top Air
Inlet (mm
2
)
Max. Air Volume
Required by the
Top Fan (CFM)
Effective Area of
Cabinet Top Air Outlet
(mm
2
)
MD500T132G 2 541 31809 649
S
=
0.942 × N × (Dout2-
DHUB2)
In the preceding formula,
N means the quantity of
top fans, Dout means
diameter of the top
fan, and DHUB means
diameter of the top fan
center HUB.
MD500T160G 2 620 31809 744
MD500T200G(-L) 2 586 31809 703
MD500T220G(-L) 2 722 31809 866
MD500T250G(-L) 3 789 47713 947
MD500T280G(-L) 3 882 47713 1058
MD500T315G(-L) 3 644 47713 773
MD500T355G(-L) 3 796 47713 955
MD500T400G(-L) 3 796 47713 955
MD500T450G(-L) 3 796 47713 955
● CFM = 0.0283 m
3
/min
● Effective area means through-hole area.