Re: UPS [Was:Re: Grand Apagon - Electricity (not) in Spain]

On 2025-05-08 16:18, Martin Brown wrote:

On 08/05/2025 14:41, Carlos E.R. wrote:

On 2025-05-08 14:44, Carlos E.R. wrote:

 

UPS Topology: Standby (Offline) or Standby (Offline)

>
{Phrase translated by DeepL, so inconsistent: Topología UPS: En espera (Fuera de línea) o Standby (Offline)}

 There are (at least) two major UPS topologies in play.
 One is where the power to the protected device is always made by the inverter and maintained at the correct main voltage irrespective of input voltage to the UPS. Useful in places where the local mains supply voltage goes up and down a lot depending on load.
 The other is a pass through of input mains voltage to the load under normal conditions and an isolation relay plus cold start of the inverter within a couple of cycles of the supply failure. This is more than good enough for PCs. Mine can withstand a 1s blackout unprotected without any difficulty but kitchen white goods clocks cannot.

Ah!  Yes, I remember now, I have seen this before. It was the terminology that was confusing me.
Thanks.

I do not see a reference to that "topology" except at the vendor. But it says that the expected battery life is 4 years.

  

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Cheers, Carlos.