westom

Protects WHAT from WHAT is the damning question. Power supplies, even decades before an IBM PC existed, contain superior protection. Even defined in ATX Standards in thousands of volts. Protection has always been required in international design standards. Or how often does your refrigerator blow out every digital clock and dimmer switch? Generally, protection required to be inside every computer is superior to same circuits found inside a UPS. Other anomalies (ie brownouts) are also made completely irrelevant by such circuits. For example, ATX Standards required computer power supplies to work and even start up when incandescent bulbs have dimmed to 40% intensity. How often is your voltage dropping that low? Numerous anomalies exist. A UPS ignores most of them. A typical UPS only provides temporary and very 'dirty' power during a blackout. Dirty? This 120 volt UPS sine wave output is 200 volt square waves with a spike of up to 270 volts between those square waves. They are not lying. Square waves and the spike are nothing more than a sum of pure sine waves (as was taught even in high school math). How clean is a UPS output? Only those with true sine waves will define it in spec numbers (ie %THD). Does your UPS define "pure" with a number? If not, then its output can be similar to mine. That misnomer is legal. Even wheat bread can be white bread colored with molasses. A title on the bread can even call potato bread as wheat bread. Depends only on the order of words. Subjective claims can say anything. Only fact that matters for a UPS is numbers from its numeric specs. Those 200 volt square waves and 270 volt spikes are ideal 'clean' power due to superior protection already inside all electronics. Do not use that UPS on less robust small electric motors or power strip protectors. All electronics already contain superior protection - even dimmer switches. What protection is provided by a UPS? Where are the spec numbers? Especially %THD. How clean is its output? If that is not answered by numbers in specifications, then its 'pure sine wave' output could be 200 volt square waves. Subjective claims can even label potato bread as wheat bread - because the claim is subjective – therefore legal. Superior protection in a computer is defined by numeric specs, for example, that conform to ATX standards.