Routing
Routing

MX104 Circuit Breakers selection

[ Edited ]
‎01-20-2017 01:34 PM

I want to ask if it´s possible to provide power to a MX104 DC using a -48V with 32 Amp breakers.

 

Juniper library and tech notes indicate that 20A for -48V and up to 40A for 24VDC, but for site limitations, I´m only able to use 32A breakers in a -48V power network.

 

Thanks in advance

2 REPLIES 2
Highlighted
Routing

Re: MX104 Circuit Breakers selection

‎01-20-2017 07:34 PM

Hi,

 

You are correct, as per the power specificication mentioned on Juniper Techpubs, it says:

 

"Each DC power supply has a single DC input (24, –48, or –60 VDC and return) that requires a dedicated circuit breaker. We recommend that you use a facility circuit breaker rated for 40 A @ 24 VDC. Doing so enables you to operate the router in any configuration without upgrading the power infrastructure, and allows the router to function at full capacity using multiple power supplies."

 

So IMO, we should stick with these specifications for the router to function at full capacity.

 

http://www.juniper.net/documentation/en_US/release-independent/junos/topics/reference/specifications...

 

Hope this helps.

 

Thanks

Hope this helps

--------------------------------------------------------------------------------------------------------
If this post was helpful, please mark this post as an "Accepted Solution".
Kudos are always appreciated!
--------------------------------------------------------------------------------------------------------
Highlighted
Routing

Re: MX104 Circuit Breakers selection

‎01-21-2017 04:48 AM

Obviously using a larger fuse than required will work, but it removes a safety factor from the equation.  This will allow too much current in the event of a problem.  This can cause damage to the hardware or a fire in the worst case.

Steve Puluka BSEET - Juniper Ambassador
IP Architect - DQE Communications Pittsburgh, PA (Metro Ethernet & ISP)
http://puluka.com/home