Not sure at what level or speed of surge is beyond the design of these, I'm sure there is a limit, they don't spec it per-se but, these do claim to protect against surges etc........
UPS's do have surge suppression built into them, it goes along with the quality of the UPS as surge suppression isn't their primary purpose. Consumer grade UPS, I wouldn't bank on much, much less surge suppression than a
good quality "surge suppressor" power strip.
A line condition is a different animal (missed this in my first post) as they filter out noise from the incoming power and boost/cut/regulate voltage, where as a UPS would just send that dirty fluctuating power through itself - if it's seeing the incoming voltage within it's threshold. A line conditioner isn't going to resolve
really bad (noisy) power, but they do a great job of cleaning up marginally bad power. They also have surge suppression, like a UPS.
APC Back-UPS 650 (consumer grade) = 340 joules surge suppression
APC Smart-UPS 750 (server grade) = 540 joules surge suppression
APC LC1200 line conditioner = 680 joules surge suppression
APC Surge Arrest 11 power strip - 3040 joules surge suppression
I have repaired too much computer equipment due to bad power, so I protect my stuff the best I can (afford).
