The caveat is in the web page text... [pasted APC web page text] > If the primary power source becomes unavailable, the rack ATS > will seamlessly source power from the secondary source without > interrupting critical loads. [end pasted text]
Depends on what your interpretation of "seamless" is... There will be some fractional switching time interruption of the mains power else they have some new/secret method for placing a lot of electronics and energy storage in a 1 RU (rack unit) box. cheers, skipp > Chuck Kimball <[EMAIL PROTECTED]> wrote: > > Laryn: > > Take a look at: http://www.apc.com/products/family/index.cfm?id=14 > > This would do exactly what you want. Don't bother with the new > (Especially at $400), I have an older version picked up off of Ebay here > at the house and it runs great. > Protects against the UPS failing, and since it's got a network > connection I can log into it remotely and actually see the log of when > power dropped out on either side. > > Chuck n0nhj > > > Laryn Lohman wrote: > > Thanks for the great posts so far. > > > > Perhaps I didn't make it clear in my original post--our equipment is > > and always has been plugged into the red receptacle. It was installed > > by hospital electricians a number of years ago for us, and we are the > > sole load on the circuit. It was the recent storm, and presumed > > lightning strike, that tripped the AC breaker in the emergency breaker > > panel in the penthouse where our stuff is. > > > > The point of all this is that the breaker tripped, leaving our > > equipment with no power <duh hehehe>. So I was proposing a method of > > implementing a "backup breaker" in case one breaker trips. My > > proposal is that our normal, daily supply would be the white > > receptacle. If it goes dead, whether from utility failure or breaker > > trip, we have the red receptacle, which will then be ready to feed our > > stuff. > > > > The reason we would not want to be on the red receptacle normally is > > that in case of a lightning strike we are potentially left with a dead > > red from the strike, and dead white if the utility is down. > > Obviously, another strike, after we've switched to the red, kills AC > > totally to our stuff. The presumption is that a breaker probably > > won't trip, even after a strike, if there's not a load of some sort on > > it to complete a path for the "tripping" current. Make sense? > > > > Eric, I think you're on my line of thinking. Good point on keeping > > the greens isolated. > > > > Laryn K8TVZ > > > > > > > > > > ------------------------------------ > > > > > > > > Yahoo! Groups Links > > > > > > > > > > >
