Cooling Requirements; Cabinet Design - Advanced Energy Pinnacle User Manual

Pinnacle™ 20 kW

COOLING REQUIREMENTS

For the Pinnacle supply to be sufficiently cooled, the cabinet must be set up to:
• Bring in coolant air of the correct temperature (40ºC maximum)
• Distribute coolant air to the power supplies
• Prevent air exhausted from the cabinet from circulating back and becoming input
air
• Exhaust the hot air from the cabinet with minimal airflow restriction.
See Figure 5-2 on page 5-5 for more detail.

Cabinet Design

The following is a synopsis of the principles to follow when designing a cabinet
containing a stack of Pinnacle power supplies.
Coolant air must be drawn easily into the cabinet; 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 Pinnacle power supply dissipates up to 10% of its maximum power at full rated
output. The minimum air flows in CFM (cubic feet per minute) required by individual
Pinnacle supplies are shown in Table 5-1 on page 5-3. 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 three Pinnacle supplies are mounted in a
cabinet, the minimum CFM requirement would be three times the CFM of cabinet air
volume compared to an individual supply. Approximations of this figure, the total
power dissipation, and the temperature difference between coolant air and exhaust air
are shown as an example in Table 5-2 on page 5-4.
Table 5-1. Minimum CFM Required for a Pinnacle Supply
Pinnacle Supply
6 kW
6x6 kW
12 kW
10 kW
10x10 kW
10x6 kW
20 kW
5702156-E
CFM Required
100 CFM
120 CFM
120 CFM
120 CFM
200 CFM
160 CFM
200 CFM
Installation 5-3