Dc Power (-48 V) Circuit Breaker Requirements For The Mx2020 Router - Juniper MX2020 Hardware Manual

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DC Power (-48 V) Circuit Breaker Requirements for the MX2020 Router

For PDMs, if you plan to operate a maximally configured DC-powered router, we recommend that you

provision at least 80 A @ –48 VDC (nominal) for each DC input to 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 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 .

For PDMs, If you plan to operate a minimally configured DC-powered router, we recommend that you

provision at least 60 A @ –48 VDC (nominal) for each input to the system. Use a customer site circuit

breaker rated according to 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.

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