Danfoss VLT FC 302 Operating Instructions Manual page 18

Installation
NOTICE
For the drive section, the fan runs for the following
reasons:
•
AMA
•
3 3
DC Hold
•
Pre-Mag
•
DC Brake
•
60% of nominal current is exceeded
•
Specific heat sink temperature exceeded (power
size dependent)
•
Specific power card ambient temperature
exceeded (power size dependent)
•
Specific control card ambient temperature
exceeded
Once the fan is started, it runs for minimum 10 minutes.
NOTICE
For the active filter, the fan runs for the following
reasons:
•
Active filter running
•
Active filter not running, but mains current
exceeding limit (power size dependent)
•
Specific heat sink temperature exceeded (power
size dependent)
•
Specific power card ambient temperature
exceeded (power size dependent)
•
Specific 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 frequency
converter according to the pressure drop.
16
Operating Instructions
Danfoss A/S © Rev. 2014-07-29 All rights reserved.
(%)
90
80
70
60
50
40
30
20
10
0
0 0.5 4.9 13 27.3
Pressure Increase
Illustration 3.1 D-Frame Derating vs. Pressure Change
Drive Air Flow: 450 cfm (765 m 3
(%)
90
80
70
60
50
40
30
20
10
0
0 0 0.1 3.6 9.8 21.5 43.4
Pressure Change
Illustration 3.2 E-Frame Derating vs. Pressure Change (Small
Fan), P315
Drive Air Flow: 650 cfm (1105 m
(%)
90
80
70
60
50
40
30
20
10
0
0 0.2 0.6 2.2 5.8 11.4 18.1 30.8
Pressure Change
Illustration 3.3 E-Frame Derating vs. Pressure Change (Large
Fan) P355-P450
Drive Air Flow: 850 cfm (1445 m
45.9 66 89.3 115.7 147
(Pa)
/h)
76 147.1 237.5 278.9
(Pa)
3 /h)
69.5 152.8 210.8
(Pa)
3 /h)
MG37A202