Solved: USV

Anonymous user · ‎2021-06-30

Hi!

I am not sure if I have configured my ups correctly:

Runtime is 42 minutes.

Low battery duration is 11 minutes

Shudown Delay is 180 seconds.

I have 3 servers.

Exchange which is highly critical server and needs 11 minutes to shutdown.

My file server is somewhat critical and so is my backup server. They need 5 minutes to shutdown.

Should I set PCNS on my exchange server “On Battery” shutdown after … 30 minutes ?
And the other servers default. ???

Thanks in advance.

TheNotoriousKMP_apc · ‎2021-06-30

DK,

The problem you may run into is that this is not a static load. Just because you have 42 minutes remaining on battery now, does not mean that if a power demand on the UPS increases when on battery, you will have 42 minutes there.

What you would want to do is throw this into a test environment with all regularly attached equipment and watch what the NMC reports. Chances are at some point during the 11 minutes, there's going to be a fluctuation of output power by the UPS, resulting in a quick decrease in runtime, which may shutdown your Exchange server or other devices prematurely.

See Answer In Context

TheNotoriousKMP_apc · ‎2021-06-30

DK,

The problem you may run into is that this is not a static load. Just because you have 42 minutes remaining on battery now, does not mean that if a power demand on the UPS increases when on battery, you will have 42 minutes there.

What you would want to do is throw this into a test environment with all regularly attached equipment and watch what the NMC reports. Chances are at some point during the 11 minutes, there's going to be a fluctuation of output power by the UPS, resulting in a quick decrease in runtime, which may shutdown your Exchange server or other devices prematurely.

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