Danfoss VLT AutomationDrive FC 302 Instruction Manual page 19

Installation
Airflow
The necessary airflow over the heatsink must be ensured. The flow rate is shown in Table 3.1.
Enclosure protection
IP21/NEMA 1
IP54/NEMA 12
Table 3.1 Heatsink Air Flow
External ducts
If additional duct work is added externally to the Rittal cabinet, the pressure drop in the ducting must be calculated. Use
the charts below to derate the adjustable frequency drive according to the pressure drop.
(%)
90
80
70
60
50
40
30
20
10
0
0 0.5 4.9 13 27.3
Pressure Increase
Figure 3.1 D-Frame Derating vs. Pressure Change
Drive Air Flow: 450 cfm (765 m
(%)
90
80
70
60
50
40
30
20
10
0
0 0 0.1 3.6 9.8 21.5 43.4
Pressure Change
Figure 3.2 E-Frame Derating vs. Pressure Change (Small Fan), P315
Drive Air Flow: 650 cfm (1105 m
MG37A222
Instruction Manual
Frame size
D13
(LHD120)
E9 P315-P400
(LHD210)
F18
(LHD330)
45.9 66 89.3 115.7 147
(Pa)
3 /h)
76 147.1 237.5 278.9
(Pa)
3 /h)
Danfoss A/S © Rev. 2014-02-07 All rights reserved.
Door fan/top fan airflow
Total airflow of multiple fans
3 door fans, 510 m 3 /h (300 cfm)
(2+1, 3x170=510)
3
4 door fans, 680 m /h (400 cfm)
(2+2, 4x170=680)
3
6 door fans, 3150 m /h
(1854 cfm)
(6x525=3150)
Heatsink fan
Total airflow for multiple fans
2 heatsink fans, 1530 m 3 /h
(900 cfm)
(1+1, 2x765=1530)
3
2 heatsink fans, 2675 m /h
(1574 cfm)
(1+1, 1230+1445=2675)
3
5 heatsink fans, 4485 m /h
(2639 cfm)
2+1+2, ((2x765)+(3x985)=4485)
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3 3