Rockwell Automation Allen-Bradley 2094-BC01-M01-S, User Manual

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Rockwell Automation Publication 2094-UM001D-EN-P - May 2010 29
Planning the Kinetix 6000 Drive System Installation Chapter 2
Total system watts dissipated (Q) was calculated at 612 W. The maximum
ambient rating of the Bulletin 2094 system is 50 °C (122 °F) and if the maximum
environmental temperature is 30 °C (86 °F), then T=20 in the equation below.
In this example, the enclosure must have an exterior surface of 6.66 m
2
. If any
portion of the enclosure is not able to transfer heat, it should not be included in
the calculation.
Because the minimum cabinet depth to house the 460V drive (selected for this
example) is 302 mm (11.9 in.), then the cabinet needs to be approximately 2500
mm (high) x 950 mm (wide) x 302 mm (deep).
2 x (0.3 x 0.95) + 2 x (0.3 x 2.5) + 2 x (0.95 x 2.5) = 6.82 m
2
Because this cabinet size is considerably larger than what is necessary to house the
system components, it may be more efficient to provide a means of cooling in a
smaller cabinet. Contact your cabinet manufacturer for options available to cool
your cabinet.
A =
0.38 (612)
1.8 (20) - 1.1
= 6.66 m
2