Juniper T640 Hardware Manual page 172

T640 Core Router Hardware Guide
Related
Documentation
138
Table 79: Typical AC Power Requirements for T640 Components
(continued)
Component
Host subsystem (600, 1600, or 2000 Routing
Engine and T-CB)
SCG
Redundant backup three-phase delta AC power
supply
Redundant backup three-phase wye AC power
supply
Cooling system (full speed – normal speed)
Craft interface
PIC —Generalized typical value
PIC (Type 3)—Generalized maximum value
PIC (Type 4)—Generalized maximum value
Example of calculating typical power consumption for minimum configuration:
Base System + 1 FPC3 + 1 PIC =
954 W + 384 W + 35 W= 2193 W
Example of calculating typical power consumption for maximum configuration:
Base System +8 Enhanced Scaling FPC3 + 1 Host subsystem + 1 SCG + 32 PICs + fan
tray (full speed – normal speed) =
954 W + 8 (514 W) + 147 W + 11 W + 32 (68 W) + 864 W =
954 W + 4112 W + 147 W + 11 W + 2176 W + 864 W = 8264 W
Example of calculating system thermal output:
Watts DC/0.293 = BTU/hr
8264/0.293 = 28,205 BTU/hr
T640 Power System Description on page 95
T640 AC Power System Specifications on page 135
T640 Three-Phase Delta AC Power Supply Specifications on page 136
T640 Three-Phase Wye AC Power Supply Specifications on page 136
T640 AC Power Cord Specifications on page 139
Power Power Requirement
Requirement (Watts) with 85%
(Watts) Efficiency
124.8 W 147 W
9.6 W 11 W
Not 91 W
applicable
Not 91 W
applicable
1056 W — 864 W
321.6 W =
734.4 W
9.6 W 11 W
30 W 35 W
57.6 W 68 W
158.4 W 186 W
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