Dc Power Circuit Breaker Requirements For The Mx240 Router - Juniper MX240 Hardware Manual

Table 20: DC Power System Specifications (continued)
Item Normal-Capacity
Output power 1600 W
(maximum) per
system
SEE ALSO
Connecting Power to a DC-Powered MX240 Router with Normal-Capacity Power Supplies | 248
Installing an MX240 DC Normal Capacity Power Supply | 390
Disconnecting an MX240 DC Power Supply Cable | 394
Calculating Power Requirements for MX240 Routers | 196

DC Power Circuit Breaker Requirements for the MX240 Router

Each DC power supply has a single DC input (–48 VDC and return) that requires a dedicated circuit breaker.
We recommend that you use a dedicated customer site circuit breaker rated for 40 A (–48 VDC) minimum,
or as required by local code. Doing so enables you to operate the router in any configuration without
upgrading the power infrastructure.
For high-capacity power supplies, we recommend that you use a dedicated customer site circuit breaker
rated for 60 A or 70A, or as required by local code,depending on the input switch setting.
If you plan to operate a DC-powered router at less than the maximum configuration and do not provision
a 40 A (–48 VDC) circuit breaker, we recommend that you provision a dedicated customer site circuit
breaker for each DC power supply rated for at least 125% of the continuous current that the system draws
at –48 VDC.
SEE ALSO
Connecting Power to a DC-Powered MX240 Router with Normal-Capacity Power Supplies | 248
Installing an MX240 DC Normal Capacity Power Supply | 390
DC Power Disconnection Warning for M Series, MX Series, and T Series Routers
DC Power Source Cabling for the MX240 Router | 63
DC Power Cable Specifications for the MX240 Router | 65
High-Capacity
2240 W 2440 W
60