Juniper SRX5800 Hardware Manual page 185

Table 44: Calculating Input Power for SRX5800 Services Gateway with SCB1 and RE1
Power Supply
SRX5800 AC high-capacity
SRX5800 DC high-capacity
1
These values are at full load and nominal voltage.
4. Calculate thermal output (BTUs) for the system. To calculate this value, add the total input power
requirement (in watts) for the two zones together and multiply the sum by 3.41 as shown in
Table 45 on page 186.
Table 45: Calculating Thermal Output for SRX5800 Services Gateway with SCB1 and RE1
Power Supply
SRX5800 AC high-capacity
SRX5800 DC high-capacity
Power Supply
1
Efficiency
~88 %
86 %
Thermal Output (BTUs per hour)
(4534 + 4636) * 3.41 = 31,269 BTU/hr
(4639 + 4744) * 3.41 = 31,996 BTU/hr
Input Power Requirement
Zone 0: 3990/0.88= 4534 W
Zone 1: 4080/0.88= 4636 W
Zone 0: 3990/0.86= 4639 W
Zone 1: 4080/0.86= 4744 W
186