UPS power output waveform

Discussion in 'General Electronics Chat' started by MrSoftware, Mar 19, 2016.

  1. MrSoftware

    Thread Starter Member

    Oct 29, 2013
    497
    122
    I'm just posting this for anyone who has been as curious as I have about what UPS output waveforms look like. I knew it wasn't a sine wave, and electric motors in particular really don't do well with it. But I wasn't expecting a square wave. I was also expecting a little more of a perfect sine wave from my utility. Anyway here's the output from an old APC 280 backups:

    My utility power from the wall:
    wall_power.png

    UPS output no-load:
    UPS_no_load.png

    UPS output small fan as a load, probably 10-20 watts:
    UPS_small_fan_load.png
     
  2. nsaspook

    AAC Fanatic!

    Aug 27, 2009
    2,907
    2,164
  3. tcmtech

    Well-Known Member

    Nov 4, 2013
    2,034
    1,627
    Your utility wave looks far better than mine.
     
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