Правильный выбор ИБП

338
user1319182

Я пытаюсь определить размер ИБП, который я должен купить. В идеале я хотел бы, чтобы в случае отключения электричества система оставалась включенной в течение часа, но у меня нет на это бюджета. В принципе, я хочу, чтобы соотношение цены и времени было лучшим.

Мой монитор - Samsung SyncMaster F2380. Я пытался определить его энергопотребление. Я могу найти здесь http://www.cnet.com/products/samsung-syncmaster-f2380/specs/, что он потребляет менее 40 Вт, но когда я пытаюсь самостоятельно рассчитать его потребление на основе информации, представленной за монитором, я получить гораздо больше значений. Вот что я вижу:

AC 100-240 1,0A

Когда я использую метод, описанный здесь https://superuser.com/a/128510/304534, я нахожу 240 Вт, поэтому я не знаю, кому верить.

Помимо монитора у меня есть компьютер с ядром i3 4330 и GTX 750 Ti. На основании этих графиков http://us.hardware.info/reviews/4993/27/intel-core-i3-4330--i5-4440-review-affordable-haswells-energy-consumpection-igpu-cinebench-115-max Я вижу, что для этого потребуется менее 100 Вт.

Поэтому я хотел бы знать, какова фактическая мощность / потребление моего монитора, а затем, какой ИБП подойдет. Что я могу ожидать от ИБП 390 Вт / 650 ВА?

Спасибо

2

1 ответ на вопрос

2
DocSalvager

You want to find a unit big enough to ...

  • handle the load (i.e. not trip the internal circuit breaker) when the power goes off
  • handle the higher peak loads of motors (fans, hard drives) starting up
  • maintain power for at least 15 minutes during an outage
  • maintain power for as long as possible after that, within the limits of your budget

I recommend starting with APC's online tool to determine what size UPS you need at http://www.apc.com/tools/ups_selector/

Other manufacturers have similar online tools but APC is the most widely sold UPS.

CAVEATS and NOTES

  • A 1 hour runtime is an entirely reasonable expectation in the real world. However, current battery technology makes that very expensive. Typical runtimes for home or office are more like 15 minutes.
    • With this, you can wait 5-10mins to see if the power comes back on.
    • If it doesn't, you've got another 5mins in which to do a clean, controlled shutdown so all your data will be safely saved.
  • As others have said, you cannot accurately determine power usage from the specs alone. Their purpose is to indicate the maximums the electrical components can safely tolerate.
  • The APC site lets you size by specs or by device categories.
    • I tried "by specs" first. Needs too much info you don't have.
    • "By device" gets you reasonable recommendations.

Based on the info supplied, their APC Power Saving Back-UPS 750 (750VA) for $110 should work fine. I've been running an older model like this for several years without complaint. If you can afford it, by all means get a larger unit. There are other brands that are cheaper and probably just as good.

When the battery finally wears out after 5-7yrs or so, it's probably worth just buying a new unit. I've replaced UPS batteries and found a new unit usually gives you better monitoring, switching, and/or surge-suppression technology for just a little more than the cost of a replacement battery.

(edit 2015-01-08)
Battery on said UPS died a few weeks ago and I found that battery prices have dropped a lot so I replaced just the battery (contrary to my advice above). So far so good. With battery prices at about a quarter to a third that of a new unit, if you don't need better electronics, replace just the battery with one from a reliable reseller.

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