ABB ACS 400 User Manual page 15

Units with IP 54/NEMA12 Enclosures
The IP 54 protection class has a different outer plastic cover compared to the IP 21. The IP 54
enclosure uses the same skeleton (inner plastic part) as the IP 21 enclosure, but an internal fan is
added to improve the cooling of the unit. This kind of structure increases the dimensions compared
to the IP 21 enclosure, but the loadability of the units with IP 54 enclosure is the same as that of the
IP 21 units.
Figure 3 IP 54/NEMA12 enclosures.
Table 3 Dimensions of units with IP 54/NEMA12 enclosures.
Dimension Reference (mm)
W
W1
W2
H
H1
H2
D
D1
a
b
c
d
Mass (kg)
See paragraph S for frame size assignments for type codes.
ACS 400 User's Manual
Frame Size, IP 54/NEMA12 *
R1 R2
215 215
98 98
453 551
318 417
330 430
240 253
95 107
5.5 5.5
10 10
5.5 5.5
5.5 5.5
7.2 11.2
R3 R4
257 257
160 160
98 98
642 742
528 619
545 636
280 312
132 145
6.5 6.5
13 14
8.0 8.0
6.5 6.5
22.3 32.3
5