TREND NX Variable Speed Drives - Manual (Page 7)

Installation on a Trend System
2 INSTALLATION ON A TREND SYSTEM
The Trend NX drive must be installed in a vertical position. It can be mounted
on a wall or in an enclosure using four screws or bolts. The cooling airflow to
the drive must not be blocked in any way; recirculation of air inside the
enclosure should be avoided.
The following tables give clearance and cooling air requirements:
Sizes FR4 to FR9 (3 A to 300 A)
Current
(A)
A (mm)
A2
(mm)
B (mm) C (mm) D (mm)
air
(m
3
/h)
3 to 12 20 - 20 100 50 70
16 to 31 20 - 20 120 60 190
35 to 61 30 - 20 160 80 425
72 to 105 80 - 80 300 100 425
140 to 205 20 150 80 300 200 650
261 to 300 50 - 80 400 250(350*) 1300
Key:
A: free space on both sides of
drive
A2: clearance needed on both
sides of drive for fan change
(without disconnecting motor
cables).
B: distance between two drives or
distance to cabinet wall
C: free space above drive
D: free space below drive (350*
refers to minimum distance for fan
change)
If several units are mounted above
each other the required space
between them equals C+D. Also
the outlet air used for cooling the
lower unit must be directed away
from the inlet air to be used by the
upper unit.
NX Variable Speed Drives Installation Manual TG200434 Issue 3/A 04/07/2006 5