UPS Input voltage UPS Input voltage AhmedMohmansour (Electrical) (OP) 7 Dec 16 07:52 I have Power source input voltage 208V line to line 60HZ can feed UPS 220V single phase (line to neutral) RE: UPS Input voltage itsmoked (Electrical) 7 Dec 16 12:27 Probably not. You should use a "boost transformer". Keith Cress kcress - http://www.flaminsystems.com RE: UPS Input voltage robertjo24 (Industrial) 7 Dec 16 14:43 Depends on the spec of the UPS in question. Many higher end units have the option to auto adjust to the input voltage. Others have a manual adjustable input, either through switches or strapping. RE: UPS Input voltage DanEE (Electrical) 7 Dec 16 15:01 Probably not as itsmoked said... for many UPS system designs. An example of a UPS system design that could do this were the "Best Power" (brand) FERRUPS UPS systems, which offered tremendous input/output voltage flexibility with their multi tapped (both input and output side) ferro resonant tranformer based design. https://powerquality.eaton.com/About-Us/BestPower.... With these systems line to line input could be used to generate line to neutral outputs at a different voltage than the incoming line to neutral voltage. You need to verify the UPS you intend to use can do this, since if there is a static bypass built in, the input voltage configuration must match output voltage and configuration. Best Power was bought out by Eaton Powerware and the FERRUPS design UPS are still in production.. Old technology, but bullet proof design. https://powerquality.eaton.com/Products-services/B... If you haven't sourced the UPS yet, perhaps a call to Eaton Powerware tech support will answer the question. RE: UPS Input voltage ScottyUK (Electrical) 7 Dec 16 17:32 It's completely possible, most of ours run 400V 3-ph input and 110V 1-ph output. Obviously the input and output voltages have to be specified at the time of order, but no technical limitations why it can't be done. RE: UPS Input voltage AhmedMohmansour (Electrical) (OP) 8 Dec 16 05:12 my question about the input voltage to the UPS can be 220 Line to line instead of 220 line to nuatral RE: UPS Input voltage jraef (Electrical) 14 Dec 16 20:00 Quote (AhmedMohmansour )my question about the input voltage to the UPS can be 220 Line to line instead of 220 line to nuatralWell, that is NOT what you asked. But if this is a NEW question related to the first one, then no, it would not make a difference, at least not in the voltage level. It may make a difference in terms of some common mode noise issues, that's something to ask of the UPS manufacturer. "You measure the size of the accomplishment by the obstacles you had to overcome to reach your goals" -- Booker T. Washington RE: UPS Input voltage GroovyGuy (Electrical) 15 Dec 16 15:18 Why not ask the OEM? "I have not failed. I've just found 10,000 ways that won't work." Thomas Alva Edison (1847-1931) RE: UPS Input voltage 3DDave (Aerospace) 15 Dec 16 20:33 GroovyGuy - that was going to be my question as well, but it seems so obvious. I'm sure there's some interesting reason.