Path: news.eternal-september.org!eternal-september.org!.POSTED!not-for-mail
From: Don Y <blockedofcourse@foo.invalid>
Newsgroups: sci.electronics.design
Subject: Re: Grand Apagon - Electricity (not) in Spain
Date: Wed, 7 May 2025 16:01:09 -0700
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>>>> Much like me having carrier doesn't tell me the extent of
>>>> my "reach", here.
>>>
>>> Well, the power outage was "total". :-D
>>
>> Yeah, but you don't know which services (up the chain) may
>> have their own *local*/private backup systems.  E.g., I doubt
>> your hospitals were without power (?)  The extent of backup
>> beyond that would be something you'd have to know, in advance.
> 
> If the fibre goes direct to the exchange, they had backup power. However, if 
> the distance is great and they have to reconstruct the signal with some kind of 
> optical amplifier, then I don't know. The distance is about 2.5 Km.

But where can exchange traffic go?  See what I mean?  Anyone that
you want to contact (and everyone along the way) must be "up".

> My mobile phone worked all the day, I could send and receive whatsapp messages.

Are those processed "locally"?

> I have a small computer doing server things, and it tried to email me as soon 
> as the UPS said it was running on battery. That email did not reach me till the 
> power came back; this could be that the fibre went OOS, or that the UPS at my 
> router went down instantly. I do not know.

Doesn't your UPS deliver log messages (to a syslog server or data
dumps to an FTP service)?

I have each of mine configured to give me summaries of power consumption
and line conditions each minute.  And, use a syslogd on that same server.

> I'm considering replacing the UPS at my router. Some UPS "destroy" the battery 
> too fast.

Yes.  Rather than spend time investigating it, I've taken the approach
of just rescuing batteries to replace those that have been "cooked".

I suspect the problem (rationalized by the manufacturers) is trying to
bring the battery back to full charge ASAP -- as well as keeping the
highest state of charge that the battery can support.

Charging at a slower rate and to a lower float voltage would
compromise the UPS's availability -- but provide less maintenance costs
(of course, the manufacturer wants to sell you batteries, so you
can see where their priorities will lie!)