Cabinet Design - Advanced Energy MDX II User Manual

Cabinet Design

You must install the MDXII unit in an interlock cabinet in accordance with IEC, EN, and
national or local requirements.
The following is a synopsis of the principles to follow when designing a cabinet containing a
stack of MDXII power supplies.
Coolant air must be drawn into the cabinet easily; exhaust air must be able to pass unrestricted
out of the cabinet. If some physical constraint restricts the flow of exhaust air out of the
cabinet, we recommend that fans or blowers be mounted so that the hot air is removed from
the cabinet as quickly as possible.
Each MDXII 15k unit dissipates 1650 W at full rated output; each MDXII 30k unit dissipates
twice that amount—3300 W at full rated output. The minimum air flow required by the
MDXII 15k is 150 CFM (cubic feet per minute); the minimum air flow for the MDXII 30k is
300 CFM. The static pressure (inches of water) of the empty cabinet should not exceed
0.1 inches of water at the CFM level obtained by adding together the minimum CFM values
for all the power supplies that will be placed in the cabinet.
For example, if two MDXII 15k units and two MDXII 30k units were to be mounted in a
cabinet (see Figure 4-4 on page 4-6), the minimum CFM requirement would be 900 CFM of
cabinet air volume (150 + 150 + 300 + 300 = 900 CFM). This would result in a total power
dissipation within the cabinet of 9900 W (1650 + 1650 +3300 + 3300 = 9900 W). The
difference in temperature between coolant air and exhaust air would be 20°C.
5700262-R Installation
MDXII Power Supplies
4-5