NOTICE!
For the drive section, the fan runs for the following
reasons:
1. AMA
2. DC Hold
3. Pre-Mag
4. DC Brake
5. 60% of nominal current is exceeded
6. Specic heatsink temperature exceeded (power
size dependent)
7. Specic Power Card ambient temperature
exceeded (power size-dependent)
8. Specic Control Card ambient temperature
exceeded
Once the fan is started, it runs for minimum 10 minutes.
NOTICE!
For the active lter, the fan runs for the following
reasons:
1. Active lter running
2. Active lter not running, but line power current
exceeding limit (power size dependent)
3. Specic heatsink temperature exceeded (power
size dependent)
4. Specic Power Card ambient temperature
exceeded (power size-dependent)
5. Specic Control Card ambient temperature
exceeded
Once the fan is started, it runs for minimum 10 minutes.
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 45.9 66 89.3 115.7 147
(%)
(Pa)
Pressure Increase
Drive Derating
130BB007.10
Figure 3.2 D-Frame Derating vs. Pressure Change Drive Air
Flow: 450 cfm (765 m
3
/h)
90
80
70
60
50
40
30
20
10
0
(%)
Drive Derating
0 0 0.1 3.6 9.8 21.5 43.4 76 237.5 278.9
(Pa)
Pressure Change
130BB010.10
147.1
Figure 3.3 E-Frame Derating vs. Pressure Change (Small Fan),
P315 Drive Air Flow: 650 cfm (1105 m
3
/h)
90
80
70
60
50
40
30
20
10
0
(%)
Drive Derating
0 0.2 0.6 2.2 5.8 11.4 18.1 30.8 152.8 210.8
(Pa)
Pressure Change
130BB011.10
69.5
Figure 3.4 E-Frame Derating vs. Pressure Change (Large Fan)
P355-P450 Drive Air Flow: 850 cfm (1445 m
3
/h)
Installation Installation Manual
MG37A322 Danfoss A/S © Rev. 04/2015 All rights reserved. 23
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