01-13-2013, 10:51 PM
Westom,
Some useful information in your post. Some info that I take issue with such as how to determine the appropriate UPS for the load you have on it. you didn't account for upgrades, additional devices and for duration of the outage. Each plays an important role when choosing the appropriately sized UPS for the job.
You've touched on the difference between standby models (very common) and online models. Here is a good white paper that describes it better than I:
For our purposes, here, I'd think of standard standby models and line-interactive models, i.e. APC Backup UPSs vs APC SMARTups models. The cheap UPSs that are very common at places like Staples and such are standby models. The better standby models also include automatic voltage regulation (AVR) which resolve the voltage issue you described. Think in terms of the APC Backups and Backups Pro models. The more expensive models also available from places like Staples and such are often line-interactive models such as the APC SMARTups series.
The info you provided about the type of output is very unclear. You're describing the difference between step-wave and sine-wave output. UPSs with sine-wave output have always been preferable. Good clean a/c output is sine wave output. The UPSs you commonly see are usually standby models with step-wave output. APC Backups XXXXX series and Backups Pro XXXXXX series are almost always step-wave models. Some can be had with AVR.
UPSs with sine-wave output have always been preferable to models with step-wave. Has been for years. However, models with sine-wave output tend to be line-interactive units or units that are on the next step up from that type. Line-interactive models are very expensive when compared to their standby cousins and oftne overkill for home, home office and even small office usage. I suspect one of the reasons why Cyberpower is making standby models with sine-wave output is because more and more people want sine-wave models but don't necessarily neither need nor can afford a line-interactive UPS like the SMARTups series.
But, all that aside, dirty juice isn't the reason people shouldn't connect printers to UPSs. It's power draw. Laser printers can draw a tremendous amount of juice at times, enough to blow the UPSs. An inkjet printer may not be an issue but I wouldn't connect one to a UPS either. Power draw is the primary reason I tell people not to protect printers with a UPS. The other reason is need. People use printers as necessary. Some don't even turn on their printers until they're actually printing something on it. That and it's easy enough to print something at a later time and/or throw a doc onto a stick and being it elsewhere for printing.
Robert
Some useful information in your post. Some info that I take issue with such as how to determine the appropriate UPS for the load you have on it. you didn't account for upgrades, additional devices and for duration of the outage. Each plays an important role when choosing the appropriately sized UPS for the job.
You've touched on the difference between standby models (very common) and online models. Here is a good white paper that describes it better than I:
For our purposes, here, I'd think of standard standby models and line-interactive models, i.e. APC Backup UPSs vs APC SMARTups models. The cheap UPSs that are very common at places like Staples and such are standby models. The better standby models also include automatic voltage regulation (AVR) which resolve the voltage issue you described. Think in terms of the APC Backups and Backups Pro models. The more expensive models also available from places like Staples and such are often line-interactive models such as the APC SMARTups series.
The info you provided about the type of output is very unclear. You're describing the difference between step-wave and sine-wave output. UPSs with sine-wave output have always been preferable. Good clean a/c output is sine wave output. The UPSs you commonly see are usually standby models with step-wave output. APC Backups XXXXX series and Backups Pro XXXXXX series are almost always step-wave models. Some can be had with AVR.
UPSs with sine-wave output have always been preferable to models with step-wave. Has been for years. However, models with sine-wave output tend to be line-interactive units or units that are on the next step up from that type. Line-interactive models are very expensive when compared to their standby cousins and oftne overkill for home, home office and even small office usage. I suspect one of the reasons why Cyberpower is making standby models with sine-wave output is because more and more people want sine-wave models but don't necessarily neither need nor can afford a line-interactive UPS like the SMARTups series.
But, all that aside, dirty juice isn't the reason people shouldn't connect printers to UPSs. It's power draw. Laser printers can draw a tremendous amount of juice at times, enough to blow the UPSs. An inkjet printer may not be an issue but I wouldn't connect one to a UPS either. Power draw is the primary reason I tell people not to protect printers with a UPS. The other reason is need. People use printers as necessary. Some don't even turn on their printers until they're actually printing something on it. That and it's easy enough to print something at a later time and/or throw a doc onto a stick and being it elsewhere for printing.
Robert