Dc Power Specifications A; T4000 Dc Power System Electrical Specifications; Table 66: Dc Power System Electrical Specifications - Juniper T4000 Hardware Manual

CHAPTER 11

DC Power Specifications A

T4000 DC Power System Electrical Specifications

Copyright © 2018, Juniper Networks, Inc.
T4000 DC Power System Electrical Specifications on page 101
T4000 DC Power Supply Specifications on page 102
T4000 Power Management (Four 60-A Cables on a Six-Input DC Power
Supply) on page 103
T4000 Power Management (Three 80-A Cables on a Six-Input DC Power
Supply) on page 103
T4000 DC Power Distribution on page 104
T4000 DC Power Cable and Lugs Specifications on page 105
Table 66 on page 101 lists the DC power system electrical specifications.

Table 66: DC Power System Electrical Specifications

Item
DC input voltage
DC system current rating
For each power supply, we recommend that you provision at least 56 A @ –48 VDC per
input. Doing so enables you to operate the router in any configuration without upgrading
the power infrastructure. Although Input 0 in the DC power supply requires less power,
we recommend provisioning the same amount of power for each input to avoid the
possibility of connecting the lower-powered DC cable to Input 1 through Input 5.
Circuit breaker current rating of 100 A per feed maximum shall be incorporated external
to the equipment. The voltage rating of this breaker shall be 80 V minimum. For each
power supply input, use a facility circuit breaker rated for 100 A (–48 VDC) maximum or
as required by local code. You must provision a circuit breaker for each DC power supply
input rated for at least 125% of the continuous current that the system draws at –48 VDC.
Specification
Operating range: –40.0 to –72.0 VDC
205 A @ –48 VDC (nominal) (9840 W)
Input 0: 25 A @ –48 VDC (nominal) (1200 W)
Input 1 through 5: 180 A @ -–48 VDC (nominal)
(8640 W)
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