said by westom:First, only UPS that does that line conditioning costs about $1000 or higher. A typical UPS connects an appliance directly to AC mains.
Again, the cheapest UPS that APC makes, for $50, claims noise filtering.
Yes, but line-interactive UPS don't run through the inverter for normal usage, so your showing us pictures of an approximated sine wave on battery power tell us nothing about noise filtering on normal operation.
said by westom:My 120 volt UPS in battery backup mode outputs 200 volt square waves with a spike of up to 270 volts. The manufacturer calls this a sine wave output. And he is not lying. Those square waves and a 270 volt spike are nothing more than a sum of pure sine waves. Since he is marketing 'conditioned' power in advertising, then he only need make subjective claims. A sine wave output from the UPS is what the utilitys tech-tip shows. My sine wave output is square waves.
You keep calling UPS output "square wave". It's not. Square waves only have two levels (low/high), approximated sine waves have three (low/med/high). What is shown in the pictures you linked to is *NOT* a square wave.
said by westom:UPS provides 'dirtiest' power during a blackout. That is also sufficient to claim 'conditioned' power.
An approximated sine wave is fine for most devices. If it is a problem, the APC Smart-UPS line, which uses a pure sine-wave on battery mode, starts at $260.
said by westom:View numbers for that filter. Near zero filtering. View numbers for its protection. Near zero surge protection. But just enough above zero so that advertising and a majority will call it surge protection and 'conditioned' power. The claim is subjective. So lying is legal.
The UPS has one function. To provide temporary and 'dirtiest' power during a blackout.
No, a UPS is intended to provide power protection. The three axis of that are surge protection, power conditioning, and power backup. Which of those are performed and how effectively they're performed vary by pricepoint.
said by westom:Second, what happens if a worst case load (or a ten amp motor) causes lights to dim 20%? Nothing. All electronics must work even if the lights dim and remain at 50% intensity. If dimming causes a modem to trip out. then a building wiring problem may exist. In most cases, is easily solved by fixing defective connections.
Some modems (or their power supplies) are incredibly sensitive to voltage fluctuations. A midrange UPS can typically guarantee voltage swings of no more than roughly +/- 5-10%, depending on the model (my older BR1500 had a much tighter range than my BR1500G). They may have to switch to battery to do that, since they don't have terribly effective autotransformers.
I'd keep replying but you just keep spouting more and more of the same FUD. Nobody is saying wiring faults don't need to get looked at.