Saved Bookmarks
| 1. |
Solve : UPS with built in AVR's? |
|
Answer» I'm thinking of buying a new UPS. I've noticed that some UPS's have built-in AVR's and some do not. Does it really make a DIFFERENCE? Does that have usually are more expensive than those that don't.AVR Voltage Regulation is good to have to condition the power to equipment better, It can clip high voltages to have a nice clean 120 as well as add power during a low voltage condition better than standard non AVR UPSs. Quote from: jquin3 on June 14, 2009, 10:03:51 PM I'm thinking of buying a new UPS. I've noticed that some UPS's have built-in AVR's and some do not. Does it really make a difference?AVR is already solved inside the computer. But AVR is also a hyped function that gets many to *feel* it must be necessary. For example, lights can dim to less than 40% intensity. And all properly constructed computers must both power up and operate just fine. AVR function inside 1980 computers was that standard. Plug-in UPS has only one function - to PROVIDE power during blackouts and extreme brownouts. To protect from data loss. Other anomalies are solved elsewhere. But promoting other near zero or mythical function gets the many to *know* it is needed. UPS has only one function - data protection. I agree with Westom...also wanted to mention that UPS's with AVR are better for sensitive devices without AVR such as we had credit card terminals at our one store that would black out on the hottest summer days, and it was because everyone in the area running AC on the power grid brought the voltage down to the low 100v range and at times it dropped into the high 90 volt range. AC adapters have windings that say drop normal 120V to 12V at 100 volts, the AC adapter is only creating 10 volts at the secondary winding. By adding a UPS with AVR we had a somewhat constant 120 when the voltages were far lower. But yes, most people could get by without AVR, but AVR is nice for sensitive devices and any devices that are powered through secondary windings of an AC adapter lacking Voltage Regulation. Our area grew fast over the last 10 years and the power company is raking in the $$$ without investing in more or heavier lines... Power outages and low voltage conditions are frequent and a royal pita Quote from: DaveLembke on June 15, 2009, 09:49:21 AM ... everyone in the area running AC on the power grid brought the voltage down to the low 100v range and at times it dropped into the high 90 volt range.If line voltages drop that low, then at most severe risk are motorized appliances such as central air. Those devices should be turned off immediately. 120 VAC should never drop below 110 volts. Specs say voltage must not drop below 114. Otherwise motorized appliances are harmed. Credit card terminals must easily WORK when 12 volts drops to 10. The adaptor voltage is converted to 5 volts to run electronics. Even any 1970 version 5 volt single chip regulator can maintain output with voltage as low as 8 volts. Sounds more like that credit card terminal is designed defectively OR line voltage was falling even further below acceptable minimums OR its filter capacitor is failing. IOW a UPS is to cure a symptom; does not solve a problem that should not exist in that terminal or on AC mains. If voltage is falling that low, then your utility may need to pay fines to the state PUC for violating service standards. But again, the UPS is still only curing symptoms - not SOLVING the unacceptable problem. If line voltage drops that low, electronics are not at risk. But motorized appliances (ie refrigerator) are. |
|