10 Replies Latest reply: Oct 21, 2010 8:42 AM by voidstar RSS

ES 350 - PC shuts off in power outage

wjmerritt Member
Currently Being Moderated
This is a fairly new unit, less than a year and every time the power blinks my 6 year old Sony Vaio shuts down.. I did a test and hooked up 200 watts of lights and pulled the power and I noticed that the lights blinked when it switched from line power to battery... The unit works with 200 watts attached... Appearently this blink is enough to shut my computer down. So is this normal? I would have figured it would have been seamless.... or is my Vaio sensative.. going to try it on my wifes HP. thanks in advance.

Message was edited by: wjmerritt
  • 1. Re: ES 350 - PC shuts off in power outage
    Jon P. =SE= Employee
    Currently Being Moderated
    Hi Warren,

    Is this the first time that you've encountered this problem? Once the Sony PC shutsdown, can you still turn it back while the UPS is on battery? Do you have any other PC that can be tested on this unit?
  • 2. Re: ES 350 - PC shuts off in power outage
    wjmerritt Member
    Currently Being Moderated
    Thanks for the response, Jon... I have noticed that it has probably been doing it for a few months since when I come home from work I noticed it had rebooted... So it has rebooted itself in the past.. But last night I was setting there when it happened. and it didn't restart. I actually had to pull the plug on the Vaio and replug it in to get it to boot. Tonight I'm going to try it on my wife's HP and see what happens...

    Message was edited by: wjmerritt
  • 3. Re: ES 350 - PC shuts off in power outage
    Jon P. =SE= Employee
    Currently Being Moderated
    This could be related to the transfer time that the UPS was designed for. The transfer time is the time it takes for the UPS to switch state from Online to OnBattery and vice-versa. Here is an APC Knowledge Base Article that I hope could help you out -> [Equipment connected to a Back-UPS product turns off unexpectedly and or/ reboots.|http://nam-en.apc.com/app/answers/detail/a_id/20/kw/drop%20load]
  • 4. Re: ES 350 - PC shuts off in power outage
    wjmerritt Member
    Currently Being Moderated
    Ok Put it on my wife's HP and monitor and it works just fine. Guess she just inherated a new UPS? lol Maybe my Vaio's power supply is getting weak and can't take a 2 to 8 ms delay? I might have a spare power supply that I could swap out and try... Thanks again Jon!

    Message was edited by: wjmerritt
  • 5. Re: ES 350 - PC shuts off in power outage
    Jon P. =SE= Employee
    Currently Being Moderated
    Double post.

    Message was edited by: JonPro
  • 6. Re: ES 350 - PC shuts off in power outage
    Jon P. =SE= Employee
    Currently Being Moderated
    For the ES 350 the transfer time is around 8~10ms. If you can't find a power supply that would work with your Vaio I suggest that you contact them to know more about the requirements of your power supply in terms of transfer time, the mininum and maximum VA and Wattage rating as well as if it can accept a step approximated sinewave. Our BackUPS produce a step approximated waveform. If their power supply needs a pure sinewave, you might need to consider moving to Smart-UPS product line.
  • 7. Re: ES 350 - PC shuts off in power outage
    Mack Member
    Currently Being Moderated
    Hello,

    I have this exact same problem. My iMac and home NAS will suddenly loose power because the ES 350 decides to switch to battery. I have no idea why it does because power seems fine for everything else in the house.

    Is this thread saying I essentially bought an inferior UPS that isn't compatible with Sony Vaio or Apple iMacs and that I need to spend even more money on an APC Smart-UPS?

    Frankly, I'm stunned. I'm a LONG time fan of APC and I've always been willing to pay the price-premium for what I thought was a superior product. But, I have to say, this is insane.

    Please tell me I'm misunderstanding this thread.

    --Mack                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   
  • 8. Re: ES 350 - PC shuts off in power outage
    Rob =SE= Employee
    Currently Being Moderated
    This thread is basically saying that virtually all home UPS systems,
    whether made by APC or a competitor, use a line interactive or standby
    topology (leading to slightly longer transfer times of 8-10 ms) and a
    stepped-approximation to a sine wave as the output waveform when the
    UPS goes to battery operation. It has been this way for a long long
    time. As stated above, some power supplies used by other devices are
    simply too sensitive to transfer time or designed so that only very
    pure sine waves are accepted. In my experience, it is usually the
    latter. It isn't necessarily the fault of the UPS or the power supply,
    it is simply an incompatibility between the two. We see this happen
    occasionally, but it is not all that common; most end users will never
    experience this. If you find yourself in such a predicament, the only
    real remedy is to either use a UPS that outputs a pure sine wave while
    on battery (yes, this technology is more expensive) or use power
    supplies that are more forgiving in the devices that are attached to
    the UPS, if applicable.

    There are other reasons that your equipment could lose power when the
    UPS switches to battery. If this is a new install, ensure that the
    battery is connected properly. Also ensure that the equipment is in
    fact plugged into the outlets that actually provide battery back-up
    power (some of the outlets offer surge protection only). If there are
    any noises emitted when the equipment shuts off then it could be an
    overload. If you give APC support a shout they can help you look into
    this.
  • 9. Re: ES 350 - PC shuts off in power outage
    Rob =SE= Employee
    Currently Being Moderated
    This thread is basically saying that virtually all home UPS systems,
    whether made by APC or a competitor, use a line interactive or standby
    topology (leading to slightly longer transfer times of 8-10 ms) and a
    stepped-approximation to a sine wave as the output waveform when the
    UPS goes to battery operation. It has been this way for a long long
    time. As stated above, some power supplies used by other devices are
    simply too sensitive to transfer time or designed so that only very
    pure sine waves are accepted. In my experience, it is usually the
    latter. It isn't necessarily the fault of the UPS or the power supply,
    it is simply an incompatibility between the two. We see this happen
    occasionally, but it is not all that common; most end users will never
    experience this. If you find yourself in such a predicament, the only
    real remedy is to either use a UPS that outputs a pure sine wave while
    on battery (yes, this technology is more expensive) or use power
    supplies that are more forgiving in the devices that are attached to
    the UPS, if applicable.

    There are other reasons that your equipment could lose power when the
    UPS switches to battery. If this is a new install, ensure that the
    battery is connected properly. Also ensure that the equipment is in
    fact plugged into the outlets that actually provide battery back-up
    power (some of the outlets offer surge protection only). If there are
    any noises emitted when the equipment shuts off then it could be an
    overload. If you give APC support a shout they can help you look into
    this.
  • 10. Re: ES 350 - PC shuts off in power outage
    voidstar Apprentice
    Currently Being Moderated
    I'd add two things to clarkson's comment:

    >
    I have this exact same problem. My iMac and home NAS will suddenly loose power because the ES 350 decides to switch to battery. I have no idea why it does because power seems fine for everything else in the house.
    >

    1) The ES 350 can supply 350VA and 200W. Today's iMac has a maximum power consumption of 241W which is more than the ES 350 can supply, even before adding the NAS. I would take a look at the power requirements of each device attached to the UPS (usually labeled near the power cord).
    2) You ask: why does the ES 350 switch to battery when other devices in the house are operating okay? (implication: Shouldn't the UPS only switch to battery when there's a power problem that would turn off my other devices?) The UPS has to be more sensitive to power disturbances than the devices attached to it, because it has to react to them and go on battery before attached devices are affected. If the UPS waited until the power disturbance affects your computer and NAS, then it would already be too late to save them.

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