ABB ACS 400 User Manual page 15

Units with IP 54/NEMA 12 Enclosures
The IP 54/NEMA 12 protection class has a different outer plastic cover. The IP 54/NEMA 12
enclosure uses the same internal plastic shell as the IP21 enclosure, but an internal fan is added to
improve cooling. This structure increases the dimensions compared to the IP 21 enclosure, but
does not require a de-rating.
Figure 3 IP 54/NEMA 12 enclosures
Table 2 Dimensions of units with IP 54/NEMA 12 enclosures.
Dimension Reference
(in/mm)
W
W1
H
H1
H2
D
a
b
c
Weight (lb/kg)
ACS 400 User's Manual
Frame Size, IP54/NEMA 12
(See Paragraph S for frame size assignments of type codes)
R1 R2
8.46/215 8.46/215
3.86/98 3.86/98
17.72/450 21.65/550
12.52/318 16.42/417
12.49/330 16.93/430
9.49/241 9.96/253
0.217/5.5 0.217/5.5
0.394/10 0.394/10
0.217/5.5 0.217/5.5
12.76/5.8 19.80/9.0
R3 R4
10.12/257 10.12/257
3.86/98 3.86/98
25.28/642 29.21/742
20.79/528 24.37/619
21.46/545 25.04/636
10.98/279 12.28/312
0.256/6.5 0.256/6.5
0.512/13 0.512/13
0.256/6.5 0.256/6.5
40.70/18.5 61.60/28
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