Vacon NXI Series - Fan Cooling

26 • vacon installation
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5
C
A
NK5_2
A
2
A
2
D
B
A
B
5.2 Fan cooling
5.2.1 Frames FR4 to FR8
Enough free space must be left around the inverter to ensure sufficient air circulation and cooling.
You will find the required dimensions for free space in the table below.
If several units are mounted on top of each other, the required free space equals C + D (see figure
below). Moreover, the outlet air used for cooling by the lower unit must be directed away from the air
intake of the upper unit. When planning the cooling for the space, take into consideration that the
inverter’s heat loss is 2.5% of the nominal capacity.
Type
Dimensions [mm]
A
A
2
B
C
D
NXI_0004—0012 5
20
20
100
50
NXI_0016—0048 5
NXI_0004—0034 6
30
20
160
80
NXI_0061—0105 5
NXI_0041—0052 6
80
80
300
100
NXI_01405
NXI_0062—0100 6
80
150
80
300
200
Table  5-6. Mounting space dimensions
Figure  5-6. Installation space
Type
Greatest possible heat loss
(kW)
Cooling air required [m
3
/h)
NXI_0004—0012 5
0,2
70
NXI_0016—0048 5
NXI_0004—0034 6
1
0,75
425
NXI_0061—0105 5
NXI_0041—0052 6
1,9
1,2
425
NXI_01405
NXI_0062—0100 6
3,3
2,25
650
Table  5-7. Required cooling air
A = clearance around the inverter (see also A
2
and B)
A
2
= clearance needed on either side of the inverter for fan
change (without disconneting the motor cables)
** = min. clearance for fan change
B = distance from one inverter to another or distance to cabinet
wall
C = free space above the inverter
D = free space underneath the inverter