On Thu, 2 Oct 2008, Lux, James P wrote:
If one considers that a single wire is about 1 uH/meter (typical electrical wiring will be much less, because it's a pair, with currents flowing opposite directions), the series L might be a few tens of uH. At, say, 20 A, there's just not much energy stored there.
I was thinking in terms of load on transformers, but yeah, I forgot (again) that switching power supplies ain't got no transformers. Voltage regulators and MAYBE UPS have transformers, but they also have bloody damn big capacitors. I'm just not used to a transformer-free world. Back in the very old days we had power problems in our server room (that I think might have been connected to people using really big physics apparatus in the building) and we bought a honker power conditioner to run a subset of our systems. If one set up a monitor within two meters of the sucker, the CRT fuzzed and distorted -- the rapidly varying field was strong enough to deflect electrons at two meters. We kept it far far away from our backup tapes...;-) rgb -- Robert G. Brown Phone(cell): 1-919-280-8443 Duke University Physics Dept, Box 90305 Durham, N.C. 27708-0305 Web: http://www.phy.duke.edu/~rgb Book of Lilith Website: http://www.phy.duke.edu/~rgb/Lilith/Lilith.php Lulu Bookstore: http://stores.lulu.com/store.php?fAcctID=877977 _______________________________________________ Beowulf mailing list, [email protected] To change your subscription (digest mode or unsubscribe) visit http://www.beowulf.org/mailman/listinfo/beowulf
