KEB COMBIVERT F5-H - 9 Project Design; General Designs; Control Cabinet Design Calculation

General design
© KEB, 2012-10 COMBIVERT F5-A, -E, -H Page 9.1 - 3
9
9. Project Design
The following chapter shall assist you in the planning stage of applications.
9.1 General designs
9.1.1 Control cabinet design calculation
Direction of
cooling ns
30
150
100
F4 F4
F5
F5
Minimum distances
KEB
COMBIVERT
Warm air
outlet
Cool air inlet
Control cabinet surface
Calculation of control cabinet surface: Air ow rate with fan cooling:
P
V
————
∆T • K
3.1 • P
V
————
∆T
A = [m
2
] V = [m
3
/h]
A = Control cabinet surface [m
2
]
∆T = temperature differential
(standard value = 20K)
[K]
K = coefcient of heat transmission
(default value = 5)
P
V
power loss (see technical data)
V = air ow rate of fan
For more details please refer to the catalogs of the control cabinet manufacturers.