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Author Topic: UPS for location use  (Read 1470 times)


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UPS for location use
« on: May 19, 2004, 11:46:40 AM »

I'm sure that I'm not the first one to wait until they have experienced a disaster before they went out and purchased a UPS for their system.  I had someone pull out the plug on my surge supressor / power strip a few minutes before the start of a performance that I was recording on location.  I managed to get everything back up and running in time to catch the start of the show and that evening's recording went smoothly.  But days later I learned that a prior recording, still stored on the machine's other hard drive was now toast.  Live and learn.....

While reading up on the different types of UPS systems, I learned that the "online" (always on battery supply) version might be better than the "line interactive" (monitors situation and switches to battery when necessary).  But I couldn't find an online version that wasn't grossly oversized (and expensive) for the single hard disk recorder that I plan on running off of it.  I ended up with a rackmount Tripp-Lite line interactive product, the SmartPro 450.

One spec that shows up on line interactive models that is not applicable to online versions is the switchover or transfer time. (the time it takes to switch over to battery power after it has detected some sort of power problem.  My unit is listed at 2 to 4 milliseconds, but I don't have any idea of that is adequate or if its long enough to make the UPS an expensive boat anchor?  Anyone out there have a clue about this stuff?


John Klett

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Re: UPS for location use
« Reply #1 on: May 25, 2004, 02:34:53 PM »

Changeover time in most UPS's are pretty quick - I have been buying  APC Smart UPS's and batteries on eBay.  They are not huge and can easily power a small to medium remote rig.  1400's weight a ton and can hold up 8-10 Amps (at 120VAC) long enough to get the plug back into the wall or shut down in good order.

The advantage of on-line supplies is that you have a constantly regulated AC supply instead of one that may fluctuate within a range without the a line interactive unit kicking in to do anything about it
John Klett / Tech Mecca
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