Cooling Requirements; Cabinet Design - Advanced Energy Pinnacle 20 kW Manual

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.

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..
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Installation
Pinnacle™ 20 kW
5-3