wildrose Posted September 21, 2022 Share Posted September 21, 2022 Здравейте. Имам следното питане – при покачване на напрежението на тока в ел. мрежа над 242.9V се включва AVR-a на UPS и бута изходящото напрежение на 207V вместо да кажем на 220-230V, което е 15% разлика, а би трябвало да не е повече от 5/8-10%. Някой има ли представа защо? Параметри на UPS-а: Марка: Artronic Модел: Art 600 (Line int.) Input: 220 – 240 Vac, 50/60 Hz, 3.9A, 1 Ф Output: 220 – 240 Vac, 50/60 Hz, 2.7A, 1 Ф 600VA/360W Имам и друг UPS от същата марка, но малко по-голям 1000VA/600W. Абсолютно същото е и при него. Прикачил съм снимки. В интернет намерих малко сходна информация. Ще цитирам част от нея: Hi, I just bought a PowerShield Defender 1600VA UPS (line interactive with buck and boost). The first day I used it I noticed that when the voltage got to 243V input, the unit would click in, the "On Line" mode icon which indicates AC mode would flash (normally it doesn't flash), and the Output voltage would drop to 207V. This is with a low 8% load, so it isn't overloaded at all. I was told that the drop in voltage is caused by the AVR being activated when it gets to 243V, the unit goes to "Back Mode", and the internal transformer drops the voltage down, which is normal. They told me that 207V is not a problem, and changing the UPS to a new unit would not make any difference (I was wondering if it was OK). Quote Link to comment Share on other sites More sharing options...
plameni Posted September 21, 2022 Share Posted September 21, 2022 Explanation of Buck and Boost in Line Interactive UPS Systems Quote Link to comment Share on other sites More sharing options...
wildrose Posted September 21, 2022 Author Share Posted September 21, 2022 (edited) 55 minutes ago, plameni said: Explanation of Buck and Boost in Line Interactive UPS Systems Благодаря @plameni!!! Да попитам стабилизаторите дали работят на същия принцип, или те на изхода се стремят винаги да изкарат номинално напрежение около 230V, независимо какво влиза на входа? Или може би трябва инверторен стабилизатор? Edited September 21, 2022 by wildrose Quote Link to comment Share on other sites More sharing options...
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