Re: Power Cut

[Gene Heskett <gheskett@shentel.net>]

On Sunday 30 October 2016 02:37:28 Hadi Motamedi wrote:

> Dear All
> I am using a debian server for cdr billing and mediation device on a
> remote network. I am experiencing problem that I am suspicious it
> comes from main supply power cut at the remote site. The power supply
> to the remote site comes from battery charger that will be
> automatically switched in circuit under main supply power cut but
> cannot provide adequate power for more than 2 hours . I am suspicious
> that the remote system is suffering from many frequent main supply
> power cut . Can you please do me favor and let me know if there is any
> log on my debian server that I can check to see if there would be many
> frequent power cut there ?
> Thank you for your time

Likely the only log will be /var/log/messages, which will show the reboot 
time when power has been restored, IF the server is set to auto-boot 
when power is restored. That should show when it restarted but may not 
log the power failure because it doesn't have time to write the log.
So you can get your restart times, but not the fail time.

Is that "battery charger" smart enough to be interfaced with nut?

Thats short for Network UPS Tools, which can monitor and log such 
activities, and even issue a clean shutdown to the whole system running 
on this emergency power when the battery is nearly depleted. I'd also 
see if natural gas is available at the site, so that a generator can be 
started when the main power fails.

Going whole house and all my toys I have a 20 Kwh Generac here that 
starts automatically, so I have power back up in about 5 seconds, but 
that was in the $7000 range installed.  The wife has copd, and long 
periods w/o the AC are very hard on her, so I did what I had to do.
This machine has a UPS, but most of the others here are set to 
auto-reboot when power is restored.

Enterprising individuals can likely setup much smaller emergency/standby 
power since all it would take in a pi or arduino and some programming to 
send the start and stop commands if it had an electric starter and  
kill.  You will need a "transfer" switch which must absolutely prevent 
any locally generated power from feeding out into a failed power line as 
that might kill someone trying to restore the power some distance away 
from your site.

Here in the states, kohler, generac, & a dozen house brands peddle 
smaller such generators, but are not always proportionately priced. Most 
of the teeny ones are 2 strokers, needing mixed fuel, don't have 
electric starters and in my experience are run 3 or 4 times junk so you 
wasted that $300. I suspect you are not in the "states" so I don't have 
a good idea what may be locally available for you.

Just throwing out ideas to see if anything "sticks to the wall" :)

Cheers, Gene Heskett
-- 
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Genes Web page <http://geneslinuxbox.net:6309/gene>