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Is UPS putting out simulated sine wave when AVR is active ?

N

nub1

Member
Hi,

I have a question for you guys.

I own this UPS http://www.njoy.ro/UPS/isis1500l (can select english in top right corner of page) for some time but recently i've moved to another apartment witch doesn't seem to have very stable power, the UPS AVR seems to kick in quite often and stays on for hours at a time, this never happened in my old apartment.

The LCD display shows ~243 incoming V and ~207 output so i am guessing it considers 243V to high and lowers it down to 207.

My question now is, when this is happening, when the AVR is active, does the UPS put out the same simulated sine wave that it does when running on battery ? or does it simply lower the voltage and provide the normal sine wave (pure?) that's coming out of the power socket ?.

Your thoughts on this are welcome, thank you.
 
When AVR is online your still getting the mains power it's just clamped or bumped to lower or higher voltage depending on if the mains power is too high or low. Your UPS is not a pure sine wave on battery power.
 
Datasheet says it uses a buck boost system which in AC is likely a buck boost transformer so the AVR / simulated sign wave inverter is likely off.
 
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