-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 On 2015-06-14 23:09, Anton Aylward wrote:
A local restaurant bought, without realising what it was, a "power saver".
I'm interested in finding out what these things are. I see them being sold for homes, but nothing in the box says what they are. And no, I haven't bought one, nor had a chance to disassemble one...
Yes it reduced their power bills. What it in fact was turned out to be a honking great capacitor that pulled the phase of their refrigerator compressor motors back. They were extolling this and salesman there was under the impression that this would work anywhere for anybody. He became angry with me when I explained some basic alternating current electrical principles to him. Late model refrigerators come with capacitors built in :-)
A power factor corrector, then. Can be a capacitor, or a bank of them with switches that adjust automatically. Or electronic switches only, similar to a pwm. But they should be used to get a factor of one, not to pull it the other way... is that what they are doing?
As I say, my Brother, when in the same 2-outlet wall socket, paralleling my UPS as your describe, caused problems, sometimes even blowing the fuse. I don't over-rate my fusing. So I have it on a completely separate circuit, it may be my imagination but sometimes I think it dims the light when it starts ... or maybe that's the starship warp drive engaging ...
:-) Bad design on the printer, if it demands so much initial load. Yep. I have seen entire computer rooms go down, with loads well within the limits, because a ground fault detector found a fault (differential switch, they are called here. Mandatory ussage) . The switching power supplies in computers often leak a bit. Too many of them, or a bad one, and the ground fault triggers. Drives the electrician men mad, LOL. I had to explain things to some of them ;-) - -- Cheers / Saludos, Carlos E. R. (from 13.1 x86_64 "Bottle" (Minas Tirith)) -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.22 (GNU/Linux) iF4EAREIAAYFAlV9+IEACgkQja8UbcUWM1zdugD/aQ1Qv1e2uIBTc6kunKtmlgtw jUa6F9vL6lP61718HM0A/208n6CqNjAaraMvoFcTIkj+iQoIoBvV1m6Mp6Usm2EY =X73p -----END PGP SIGNATURE----- -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org