• T640 AC Power Electrical Safety Guidelines on page 537
• T640 AC Power Cord Specifications on page 139
T640 AC Power Requirements
To allow for future growth so that you can operate the router in any hardware configuration
without upgrading the power infrastructure, we recommend that you provision 11,765 W
per each three-phase delta AC power supply or 11,775 W per each three-phase wye AC
power supply.
If you do not plan to provision 11,765 W per each three-phase delta AC power supply or
11,775 W per each three-phase wye AC power supply, you can use the information in
Table 78 on page 137, Table 79 on page 137 and the T640 Core Router Interface Module
Reference to calculate power consumption for various hardware configurations, input
current from a different source voltage, and thermal output, as shown in the following
examples for an AC-powered router.
Table 78 on page 137 lists the power requirements for various hardware components
when the router is operating under typical voltage conditions. For power requirements
for specific PICs, see the T640 Core Router Interface Module Reference.
Table 78: T640 Base AC Power Requirements
Power Requirement (Watts)Component
954 WBase system, not including FPCs and PICs
(includes five SIBs, one host subsystem (T-CB and
600, 1600, or 2000 Routing Engine ), one SCG,
cooling system at normal speed, and craft
interface), and two AC power supplies
Table 79: Typical AC Power Requirements for T640 Components
Power Requirement
(Watts) with 85%
Efficiency
Power
Requirement
(Watts)Component
44 W38 WSIB: Standard SIB, standard SIB version B, or
T640-SIB
192 W163.2 WEnhanced II FPC1
401 W340.8 WEnhanced Scaling FPC1
192 W163.2 WFPC2 and Enhanced II FPC2
384 W326.4 WFPC3 and Enhanced II FPC3
514 W437.28 WEnhanced Scaling FPC3
463 W393.6 WT640 Enhanced Scaling FPC4
137Copyright © 2017, Juniper Networks, Inc.
Chapter 11: AC Power Requirements and Specifications
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