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Uninterruptible Power Supply (UPS) Interrupting Power

Discussion in 'Miscellaneous Equipment' started by Dr_J, Apr 28, 2012.

  1. Rich

    Rich DBSTalk Club DBSTalk Club

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    That's a practice that needs to stop. Apparently all the manufacturers use this kind of ambiguous wording to trick unknowing folks into buying UPS devices. Anyone with any knowledge of electricity knows that W=VA is the equation for determining the wattage of a resistive load and that equation can also be used as a quick ballpark determination of rough wattage used by inductive loads, not precise, but close enough.

    Why would manufacturers of UPS devices do this? If you buy a 550VA and disregard the wattage rating and load up the UPS to ~ 500W, you're gonna need a new UPS pretty quickly. Scurrilous way to drive up sales.

    Rich
     
  2. WestDC

    WestDC Well-Known Member

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    rich-It only apply's to Run- Time When the power's off!! Most folks don't use the unit to Run The TV or Computer When the power fails - It allows for the computer or User to turn off (in this case) the TV if it in use. (being watched) OH!! S$$$ the power went off ,, I think I'll turn off the TV. :)

    If you need a true UPS for your HOme " Then You would instal a Propane,Natural Gas, Or Fuel oil Generator . for Full Run time after the grid fails.

    the math only applies to any equipment you need to run after power fail- Of course you know that already.
     
  3. John Williams

    John Williams Legend

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    Re-read what UPS he is using upstairs and what TV is on it. (i.e. a low wattage UPS and a TV that draws more power than it is designed to supply).
    You are telling him to do something that is going to eventually DAMAGE his UPS again!
     
  4. WestDC

    WestDC Well-Known Member

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    The Ups only supply's 119 vac - constant-The TV requires that as well - The consumption only occurs when the ac POWER FAILS. When it fails turn the TV off -end of draw. The ups is not harmed. It does it's job, he could go up to a 650 or a 1500 Ups. However the 500 lasted 5yrs - so a larger UPS may be all he needs.
     
  5. Rich

    Rich DBSTalk Club DBSTalk Club

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    Yup, I do know that. But how many folks out there just merrily keep watching TV when the power goes out? Betcha it's a whole lot of people that do that. On those itty-bitty APCs.

    Rich
     
  6. Rich

    Rich DBSTalk Club DBSTalk Club

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    You have to pay a whole lot of money for a UPS that produces a clean sine wave. And to get a UPS that gives you constant voltage on a clean sine wave you have to spend even more. How much? We'll have to ask Richierich, I know he's got the more expensive models, but I don't know if his are constant voltage devices.

    Rich
     
  7. Rich

    Rich DBSTalk Club DBSTalk Club

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    A really expensive UPS will take the voltage input and keep it constant and clean when the power is on. In the area I live in, it would be a ridiculous expense. My power goes off, most of my UPS devices are immediately shut down. The only time I leave one on is if it's recording something I really want to see and then I use my 1000W UPS. For just one or two HRs.

    Rich
     
  8. John Williams

    John Williams Legend

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    You do realize what you just said right.
    This is like saying: I smoked crack once, no damage done. I ran my car with no oil in it once, no damage done.
    YES!!!!!! it does damage.

    If you put a load that exceeds what the UPS can handle. Then the second the inverter comes into the circuit and is running on battery, it is being stressed. Enough stress.... failure.
    Or are you saying that he NEVER has loss of power or power fluctuations. If so, then why would he even need a UPS at all.
     
  9. Dr_J

    Dr_J Icon

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    I very seldom use the bedroom TV anymore, particularly since I have a 60" plasma 3DTV downstairs. However, in the almost 5 years that I had the old UPS, the power never went out while I was watching TV. The only devices that were on the battery during a power outage were the VCR clock and DVR in standby. The only reason I even got a UPS was because of advice elsewhere in these forums that they stabilize the line current going to the DVR or some such reason, potentially extending its life. This summer, I will have had this bedroom DirecTiVo for 7 years. My HR20 on the UPS downstairs was still going strong after 4+ years when I upgraded to the HR24 for 3D.
     
  10. Rich

    Rich DBSTalk Club DBSTalk Club

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    There is no such thing as "line current" in the context you used the phrase. What you meant was the stabilization of voltage, which you're not gonna get from anything but a really expensive UPS.

    Rich
     
  11. hdtvfan0001

    hdtvfan0001 Well-Known Member

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    Yeah...what he said. :D

    This is a topic where I know Rich has alot of knowledge and experience. ;):)
     
  12. Dr_J

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    Thanks for the clarification. I guess I've just been lucky the DVR's have lasted as long as they have. :) The very first DirecTiVo I had only lasted two years before it started freezing due to likely hard drive failure.
     
  13. Rich

    Rich DBSTalk Club DBSTalk Club

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    The DVRs I've got that aren't on UPS devices have run just as well as those on my UPS devices. I just went thru a horrible experience with the power supplied to my home. I kept losing (and I'm making this simple to understand) one hot wire coming into my home and also had problems with the neutral. Finally found the problem, related to a tree falling on my wires from the pole last year. No electronic or electrical equipment was adversely affected in my home. I've got eight Panny plasmas and none of them are on UPS devices and none were harmed and all twelve of my HRs came thru without problems.

    UPS devices are fine to have, but I've always questioned the need for them. The only reason I got them was that the 20-700s became very sensitive to voltage dips or very brief outages, outages that had no effect on any other electronic or electric devices. Whatever happened to the 20-700s has been fixed, I haven't seen any of them that are not on UPS reboot recently.

    Rich
     
  14. Dr_J

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    I think they're good to have to prevent recording interruption, which may have been one of the prime reasons I got a UPS in the first place. I remember scheduling something to record on a Sunday, was away for that day, but noticed a line of popup thunderstorms coming through near home on the radar right around the time the recording was supposed to be happening. When I got home, I saw the recording was ruined, likely due to a momentary power outage.
     
  15. jerry downing

    jerry downing Godfather

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    From information I got from the APC web site, a continuous beep is telling you of an overload. I solved my problem by purchasing a larger UPS and using the small one to run my DVR. Both UPS's performed well during a brief power outage today.
     
  16. Rich

    Rich DBSTalk Club DBSTalk Club

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    Again, use the 80% method and that will never happen. Shortly put, don't put more than 80% of the UPS device's capacity on it. Just add up the wattage of the devices you are putting on the UPS and keep it at 80% of the WATTAGE rating. Disregard the VA rating.

    Rich
     
  17. Dr_J

    Dr_J Icon

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    At the time of the continuous beep, the only thing connected to the old, small UPS was a lamp with a 60-watt bulb. So that old UPS has to be broken. The new, small UPS has been connected for a few weeks now with no issues. Now I just have to decide how to proceed with the big UPS downstairs that's almost 5 years old but has not given me a single problem so far.
     
  18. Rich

    Rich DBSTalk Club DBSTalk Club

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    Batteries are like milk, if you gotta smell milk to see if it's good throw it out. If you have doubts about a battery, replace it.

    Rich
     
  19. Dr_J

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    Interesting way of looking at it. :)
     
  20. Rich

    Rich DBSTalk Club DBSTalk Club

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    Thanx.....:)

    Rich
     

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