H3C Technologies H3C S12500-X Series Switches - Manual (Page 98)

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System power consumption
The system power consumption of the switch depends on the type and number of cards and the fan tray
power consumption.
• The minimum system power consumption is the total static power consumption of all cards plus the
minimum fan tray power consumption.
• The maximum system power consumption is the total dynamic power consumption of all cards plus
the maximum fan tray power consumption.
For example, for an S12510-X AC switch that has two LSX1SUP10A1 MPUs, two LSX1TGS48EA1 LPUs,
six LSX1FAB10B1 switching fabric modules, and two S12510-X fan trays, the minimum system power
consumption of the switch is 2 × 45 + 2 × 310+ 6 × 135 + 2 × 196= 1912 W, and the maximum system
power consumption of the switch is 2 × 50 + 2 × 435 + 6 × 170 +2 × 1377 = 4744 W.
Heat dissipation
Heat dissipation is measured in BTU/h, and 1 W equals 3.4121 BTU/h.
The heat dissipation of a switch depends on its power consumption. To calculate heat dissipation of the
switch, assume 90% power consumption is converted to heat, and the efficiency of the power module is
90%. Heat dissipation/hour of the switch is 0.9 × (total power consumption of the cards plus power
consumption of the fan tray)/0.9 × 3.4121.
For the power consumption of the cards and fan trays of the H3C S12500-X switches, see "
Module
power consumption and system power consumption ."
Environmental specifications
Table 22 Environmental specifications
Description Operating Non-operating
Temperature 0°C to 45°C (32°F to 113°F) –40°C to +70°C (–40°F to +158°F)
Relative humidity
(noncondensing)
5% to 95% 5% to 95%
Noise
The switch uses fans with the automatic speed adjustment function, so the sound pressure levels vary by
fan speed. For more information, see Table 23 .
Table 23 Sound pressure levels
Model
Sound pressure level under
normal temperature
Sound pressure level when the
fan tray operates at full speed
• S12510-X AC (two fan trays)
• S12510-X DC (two fan trays)
67.7 dBA 83.9 dBA