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Balanced power UPS or something like that...
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<blockquote data-quote="westom" data-source="post: 1407334" data-attributes="member: 138367"><p>Show me any number from the "box" that says it provides clean or balanced power? 'Dirtiest' power seen in a house comes from a UPS in battery backup mode. 'Cleanest' output is when it connects the computer direct to AC mains.</p><p></p><p> Numbers from this 120 volt 'sine wave' UPS in battery backup mode. 200 volt square waves with a spike of up to 270 volts. Is that a pure sine wave output? Of course. Because square waves and the spike are only a sum of pure sine waves. They made claims subjectively. Once we add numbers, the "box" is no longer magic.</p><p></p><p> Why does a UPS output power so 'dirty'? Because all electronic are so robust as to even make that 270 volt spike irrelevant. Computers have even more robust circuits.</p><p></p><p>If a UPS outputs 'clean' or 'balanced' power, then you have numbers that say so.</p><p></p><p>Done inside electronics is to make that power unbalanced. Does not matter how 'balance' you feed it. It must restore the unbalance. Unbalanced is necessary for human safety and other superior design requirements. Balanced power is a rumor that makes naive consumers feel good. It has no purpose in electronic design.</p><p></p><p> If a UPS does not define what it does with a number, then it is advertising. Lies are legal in advertising because the claim is subjective. No numbers.</p></blockquote><p></p>
[QUOTE="westom, post: 1407334, member: 138367"] Show me any number from the "box" that says it provides clean or balanced power? 'Dirtiest' power seen in a house comes from a UPS in battery backup mode. 'Cleanest' output is when it connects the computer direct to AC mains. Numbers from this 120 volt 'sine wave' UPS in battery backup mode. 200 volt square waves with a spike of up to 270 volts. Is that a pure sine wave output? Of course. Because square waves and the spike are only a sum of pure sine waves. They made claims subjectively. Once we add numbers, the "box" is no longer magic. Why does a UPS output power so 'dirty'? Because all electronic are so robust as to even make that 270 volt spike irrelevant. Computers have even more robust circuits. If a UPS outputs 'clean' or 'balanced' power, then you have numbers that say so. Done inside electronics is to make that power unbalanced. Does not matter how 'balance' you feed it. It must restore the unbalance. Unbalanced is necessary for human safety and other superior design requirements. Balanced power is a rumor that makes naive consumers feel good. It has no purpose in electronic design. If a UPS does not define what it does with a number, then it is advertising. Lies are legal in advertising because the claim is subjective. No numbers. [/QUOTE]
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