Dc Power Circuit Breaker Requirements For The Mx480 Router; Table 21: Power System Specifications - Juniper MX480 Hardware Manual

MX480 Universal Routing Platform Hardware Guide
Table 20: Power Supply Electrical Specifications (continued)

Table 21: Power System Specifications

Item Normal-Capacity
Redundancy 2+2
Output power 1600 W
(maximum) per
supply
Output power 3200 W
(maximum) per
system
See Also

DC Power Circuit Breaker Requirements for the MX480 Router

Each DC power supply has a single DC input (–48 VDC and return) that requires a
dedicated circuit breaker. If you plan to operate a maximally configured DC-powered
router with normal-capacity power supplies, we recommend that you use a dedicated
customer site circuit breaker rated for 40 A (–48 VDC) minimum, or as required by local
code. If you plan to operate a maximally configured DC-powered router with high-capacity
power supplies, we recommend that you use a circuit breaker rated for 70 A (–48 VDC),
or as required by local code.
If you plan to operate a DC-powered router at less than the maximum configuration, we
recommend that you provision a circuit breaker according to respective National Electrical
56
Item Specification
High-Capacity Power Supplies
Maximum Input Current 60 A (DIP=0)
Maximum output power 2240 W
DC input current rating 50 A @ -48 VDC normal operating
voltage
DC input voltage Operating Range: –40.5 VDC to –72 VDC
Nominal: –48 VDC
Efficiency
NOTE: This value is at full
load and nominal voltage.
Calculating Power Requirements for MX480 Routers on page 158
~98%
High-Capacity
2+2
60 A (DIP=0)
2240 W
4480 W
Copyright © 2019, Juniper Networks, Inc.
70 A (DIP=1)
2440 W
54.2 A @ -48 VDC normal operating
voltage
70 A (DIP=1)
2440 W
4880 W