N+1 UPS

[Charz]

Which can be called as N+1 system in the below pictures.

 

[zbang]

The chargers in the second could be N+1 if two chargers can completely carry the load. The rest of the system isn't redundant at all.

 

[petersonra]

What is the advantage of a positive ground system.

 

[hbiss]

What is the advantage of a positive ground system.

To minimize corrosion.

-Hal

 

[Jraef]

Which can be called as N+1 system in the below pictures.

View attachment 2552455View attachment 2552456

You can’t actually a answer that question without knowing the capacity of each charger. For example if each individual charger In picture 1 is rated to carry only 1/2 of the load, then you don’t have redundancy at all because of one fails you will be forced to reduce your load or shut down. But if each is rated for full load, you do have N+1 because of one fails, you carry on as if nothing happened. Then if in picture 2, all 3 are rated for the full load, you actually have N+2 redundancy, but if each is rated for 1/2 load, then you have N+1. You need to know the capacity of the N elements in the system.

But as Zbang said, this is not a redundant SYSTEM, because nothing else is redundant. So really, you can only talk about the redundancy of the CHARGERS in this system.