Dc Power Circuit Breaker Requirements For The Mx960 Router; Dc Power Source Cabling For The Mx960 Router; Table 91: Calculating Thermal Output - Juniper MX960 Hardware Manual

Table 91: Calculating Thermal Output

Power Supply
MX960 AC high-capacity
MX960 DC high-capacity
Related
Documentation

DC Power Circuit Breaker Requirements for the MX960 Router

Related
Documentation

DC Power Source Cabling for the MX960 Router

Copyright © 2017, Juniper Networks, Inc.
1
Zone 0 output. The calculation method for zone 1 is the same as for zone 0.
Power Requirements for an MX960 Router on page 152
Electrical Specifications for the MX960 AC Power Supply on page 151
Electrical Specifications for the MX960 DC Power Supply on page 169
If you plan to operate a maximally configured DC-powered router with normal capacity
power suplies, we recommend that you provision at least 116 A (58 A per feed) @ –48
VDC (nominal) for the system. Use a customer site circuit breaker rated according to
respective National Electrical Code and customer site internal standards to maintain
proper level of protection for the current specified above.
If you plan to operate a maximally configured DC-powered router with high-capacity
power supplies, we recommend that you provision at least 208 A (104 A per supply) @
–48 VDC (nominal) for the system. This is maximum current draw at –48 VDC when two
power supplies are providing the power to the system and the redundant power supplies
are not supplying power or not present. Use a customer site circuit breaker rated according
to respective National Electrical Code and customer site internal standards to maintain
proper level of protection for the current specified above.
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
Code and customer site internal standards to maintain proper level of protection for the
current specified above or each DC power supply rated for at least 125% of the continuous
current that the system draws at –48 VDC.
MX960 DC Power Supply on page 104
MX960 DC Power Electrical Safety Guidelines
Electrical Specifications for the MX960 DC Power Supply on page 169
Figure 49 on page 184 shows a typical DC source cabling arrangement.
Chapter 13: DC Power Requirements, Specifications, and Guidelines
Thermal Output (BTUs per hour)
1
3335 * 3.41 = 11,372 BTU/hr
1
3413 * 3.41 = 11,638 BTU/hr
183