home bbs files messages ]

Forums before death by AOL, social media and spammers... "We can't have nice things"

   comp.sys.raspberry-pi      Raspberry Pi computers & related hardwar      26,127 messages   

[   << oldest   |   < older   |   list   |   newer >   |   newest >>   ]

   Message 24,305 of 26,127   
   Vincent Coen to you   
   Backup power supply   
   14 Mar 24 21:00:49   
   
   From: nospam.Vincent.Coen@f1.n250.z2.fidonet.org   
      
   Hello Mike!   
      
   Wednesday March 13 2024 18:47, you wrote to me:   
      
    > On 13/03/2024 03:32, Vincent Coen wrote:   
    >> systems I use APC smart UPS's connect to a large adaptor block that   
    >> hold around 9 sockets with the APC unit being 1000Va.  I did have a   
    >> 2k2 VA but the   
      
    > And what's the standby current of such a UPS?   
      
   Standby ?   
      
   Assuming it is fully charged which would be normal (assuming no outage in the   
   preceding 2 - 3 hours 95% or better.   
      
   Otherwise do you mean the estimated run time if so then system under power in   
   watts per   
   hour under the rated size - 25%  so lets say :   
      
   750 w   
   ----  = 150 = long time :)   
   5 w   
      
      
   Also e.g., my desktop / server system with an estimated consumption of 250w   
   (and it is lower as using modular PSU, 85% eff or better )  would be around 3   
   hours but that assumes there is nothing else under load and there is such as::   
   Router   
   Baby Hub   
   Monitor ( but only when I am using it )   
   Telephone systems including VOIP adaptor   
   Residual loading - not known as  no means to test it.   
      
   Total time with a 25% battery remaining around 90 minutes allowing for 7   
   minutes to shut down and battery remaining of around 22-23 % approx.   
      
   If I am present when power goes I can shutdown the monitor and let it does its   
   thing if battery drops to predetermined amount of 25%.   
   That said during the cold months (UK wise) and I am around I will manually   
   shutdown after 15 minutes and transfer the UPS o/p to the C.H. and turn it on   
   in which case over 24 hours runtime, but so far has never got any where near   
   it   
   before power is restored. My old house in a village power outs could be longer   
   and hence the reason for 2 x 2.2Kva UPS's. ( Also smart models ).   
      
   Gave me enough time to power up my ex-mil generator if needed but it was a   
   petrol model so did go through it - petrol I mean so had to keep a few jerry   
   cans filled with fresh fuel as a JIC.   
      
      
   Vincent   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)   

[   << oldest   |   < older   |   list   |   newer >   |   newest >>   ]


(c) 1994,  bbs@darkrealms.ca