UPS Question. Advice needed.

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FlashSA

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So I have my adsl router on a dedicated ups for when the power trips or goes down, but sometimes at changeover from mains to battery, the adsl modem freezes and locks up. I can't ping it or log in and only a hard reboot sorts it out. Now my question is - can one run ups's in series? Can i plug my router's ups into another ups giving it double protection? Surely the output from the first ups is normal 220volt and powers the second, router ups just like mains does? Or will the second ups not like the source power coming from the first ups? Thoughts? I don't want to blow anything up or start a fire :-)
 
Yes the output is 220volt AC, I'm not too sure why but this does sound like a bad idea to me.
First check your UPS specifications and plug the router into the one that has the quicker switchover time.
 
It does sounds dodgy....
What UPS is it? Try looking at an inline UPS, it protects against electrical spikes (brownouts and power cuts). This should solve the problem.
 
flashsa said:
So I have my adsl router on a dedicated ups for when the power trips or goes down, but sometimes at changeover from mains to battery, the adsl modem freezes and locks up. I can't ping it or log in and only a hard reboot sorts it out. Now my question is - can one run ups's in series? Can i plug my router's ups into another ups giving it double protection? Surely the output from the first ups is normal 220volt and powers the second, router ups just like mains does? Or will the second ups not like the source power coming from the first ups? Thoughts? I don't want to blow anything up or start a fire :-)
Click to expand...

Short answer: No

Long answer: No; you will put undue strain on the wall-connected UPS, while not improving the run-time of your setup (the wall-connected UPS will output a simulated sine wave, which will cause the router-connected UPS to switch to battery). You will also be putting the metal oxide varistors in series, which will cause them to malfunction.
 
Yeah I am using 2 el cheapo 600va UPS's. They are no name brands from a random PC Shop.... will maybe look into a better quality UPS. Was very scared to just plug them in series without asking advise first because I have read that the wave is different coming out of a UPS than the wall plug!
 
froot said:
It does sounds dodgy....
What UPS is it? Try looking at an inline UPS, it protects against electrical spikes (brownouts and power cuts). This should solve the problem.
Click to expand...

+10000

Inline works best, but it's costly thou.
 
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