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UPS recommendations

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Re: UPS recommendations

Postby Wonks » Mon Sep 17, 2018 9:30 am

Hobbes wrote: Just enough to smooth out the electrics and give me enough time to save my work and shut down in case of a power cut.

So your current UPS is an always on-line pure sine wave output one? Because most small UPS systems aren't and the battery (and associated voltage regulation etc.) only kicks in on power failure. These typically start around the £1000 point in the UK.

Tell us the model you have, then it's easier for others to suggest something (not that I 'm current with UPS offerings).
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Re: UPS recommendations

Postby The Red Bladder » Mon Sep 17, 2018 10:36 am

It sounds as if your old UPS just had a rectifier or similar (cheap component) failure. A buzzing noise prior to total failure is typical and I would just get the damn thing fixed.
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Re: UPS recommendations

Postby ef37a » Tue Sep 18, 2018 9:32 pm

The Red Bladder wrote:It sounds as if your old UPS just had a rectifier or similar (cheap component) failure. A buzzing noise prior to total failure is typical and I would just get the damn thing fixed.

Whilst I am almost always in favour of fixing not flinging gear battery technology has moved on apace in the last 5 years or so. The modern Lithium battery are smaller, lighter and far less fussy about charge rates than the Sealed Lead Acids normally used in a UPS and do not suffer the "memory effect" of NiCads.

I also suspect the fault is more extensive than simply a punched through rectifier? A filter cap may have shorted, that borkerd the bridge and there might be blown print all over the shop. We are talking serious electrical energies here.

I don't think OP needs a continuous converting supply? "Modified Sine" with rapid switch over seems to suit most people ok. Computer power supplies "modify sines" very well as it is!

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