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From: "Carlos E.R." <robin_listas@es.invalid>
Newsgroups: sci.electronics.design
Subject: Re: Grand Apagon - Electricity (not) in Spain
Date: Fri, 9 May 2025 12:29:11 +0200
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On 2025-05-09 00:38, Don Y wrote:
>>>> My mobile phone worked all the day, I could send and receive 
>>>> whatsapp messages.
>>>
>>> Are those processed "locally"?
>>
>> No. I don't know if they have centralized server or distributed.
> 
> Some have "content distribution networks".
> 
>>>> 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)?
>>
>> The one on the server did, yes, but the one on the router doesn't have 
>> that facility.
> 
> I used to think syslogd support was just another gimmick.  But,
> I've come to appreciate being able to find ALL of the logs
> on ONE server (that is always up).  Hard to examine a log on
> a device that won't boot, etc.

I agree. But my current router, for instance, doesn't have the feature. 
Doesn't even log locally. It is supplied by the ISP. The previous unit 
did have remote syslog capability, so I used it.

> 
>>> 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 don't think any of mine can report power usage.
> 
> IIRC, they report:
> Date/Time
> Vmin/Vmax (input)
> Vout/Iout
> %Wout/%VAout/%capacity
> Frequency
> Vbat
> Internal temperature
> "external" temperature & humidity (intended for use in a server room)

cer@Isengard:~> upsc salicru
battery.charge: 100
battery.voltage: 13.60
battery.voltage.high: 13.60
battery.voltage.low: 10.40
battery.voltage.nominal: 12.0
device.type: ups
driver.name: blazer_usb
driver.parameter.pollinterval: 2
driver.parameter.port: auto
driver.parameter.synchronous: no
driver.version: 2.7.4
driver.version.internal: 0.12
input.current.nominal: 3.0
input.frequency: 50.0
input.frequency.nominal: 50
input.voltage: 229.4
input.voltage.fault: 229.4
input.voltage.nominal: 230
output.voltage: 229.4
ups.beeper.status: enabled
ups.delay.shutdown: 30
ups.delay.start: 180
ups.load: 13
ups.productid: 5161
ups.status: FSD OL
ups.temperature: 25.0
ups.type: offline / line interactive
ups.vendorid: 0665
cer@Isengard:~>


It doesn't report current. There is "ups.load: 13", but no idea of the 
units.


> 
>>> 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!)
>>
>> Indeed.
>>
>> I saw in an Eaton model they mentioned two strategies - translated 
>> from Spanish:
>>
>> UPS Topology: Standby (Offline) or Standby (Offline)
>>
>> Eaton Ellipse ECO 650 IEC SAI Offline 650VA 400W
>> Eaton P/N: EL650IEC
> 
> I have a couple of eatons in the garage.  I didn't like them for
> use in the office as their fans (run continuously) are louder
> than I would like (and I have no desire to go tweaking fans)

Ah, no, no fan in mine.

-- 
Cheers, Carlos.