H3C Technologies H3C S9800 Series Switches - Manual (Page 67)

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• Maximum system power consumption—Dynamic power consumption of all cards + Maximum
power consumption of all fan trays.
For example, for an S9804 switch that has four LSV1QGS12SA1 LPUs and two S9804 fan trays,
the maximum system power consumption is: 350 (maximum power consumption of the main
process unit LSV1MPUA1) + 4 × 230 + 2 × 130 = 1530 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 S9800 Switch Series, see "
Power
consumptions ."
Temperature and humidity
Table 13 Temperature and humidity specifications
Item Operating environment Non-operating environment
Temperature 0°C to 40°C (32°F to 104°F) –40°C to +70°C (–40°F to +158°F)
Relative humidity
(noncondensing)
5% to 95% 5% to 95%
Noise
The switch fan trays can automatically adjust the fan speed based on the heat dissipation condition of the
switch. The sound pressure levels of the switch vary by fan speed. For more information, see
Table 14 .
Table 14 Sound pressure levels
Model
Sound pressure level under room
temperature
Sound pressure level when the fan
tray operates at full speed
S9804 (two fan trays) 59.8 dB 76.3 dB
S9810 (two fan trays) 50.5 dB 77.9 dB
NOTE:
The sound pressure levels are measured according to the method specified in ISO 7779 at the bystander
position.