EnerSys alpha LPS36, Техническое руководство

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0120011-J0 Rev M 26
6�4 Thermal Management
This section provides supplemental information regarding thermal management of the LPS36.
NOTE: 2
When the LPS36 is operating normally at maximum rated load, the shelf level rate of
heat dissipation exceeds the allowable limit of 27.9 W/sq.ft. per Section 4.1.6 of GR-63-
CORE (Issue 6).
Alpha recommends leaving a minimum of 27.3 (22.9) inches vacant vertical rack space
for each 23" (19") shelf installation to meet the required shelf-level rate of heat dissipa-
tion. In addition, special equipment room cooling may be required.
NOTE: 1
Blanking plates must be installed in all the empty converter slots when forced air or fan
cooling is used for the application.
6�4�1 Natural Convection (Ta = -40°C to +45°C) — One Shelf Only
The high efficiency of LPS36, given its high power density, makes it possible to operate up to 45
°
C ambient at full
power without the need for fan tray or external airflow for one shelf only . When installing the LPS36 Shelf in a
CO type installation that only relies on natural convection for cooling, proper spacing from surrounding equipment
should be observed to facilitate effective ventilation as shown below in Figure 12.
Figure 12 — Natural Convection 19"/23" Systems
1RU Air Gap
LPS36 Shelf
LPS36 Air Baffle
½RU Air Gap
Open space or any equipment that
does not expel/radiate heat vertically
Equipment that expels heat upwards
Ambient temperature (Ta) shall not exceed 45°C
CAUTION!
CAUTION: For natural convection cooling the only orientation that can be used is the
one pictured in Figure 12.