[rescue] adding power redundancy to single power supply systems ?
ssandau at gwi.net
Mon Mar 24 19:35:24 CDT 2008
>> Since it's APC I assume there is something in there that covers it
>> during the switch. I don't know what happens if you have power
>> coming in at different phases... I assume it sends the glitch thru.
> Dunno about phases (talking above my pay grade ;^), but it seems to
> me that ideally the APC-type unit would essentially be a relay
> feeding into a tiny UPS (a big capacitor?) to provide adequate power
> for the split-second the relay is switching over.
My old boss was telling me about the switch to bring his generator on-
and offline. He called it something like a "make-before-break" switch. I
guess the idea was that the new connection was made before the original
connection was broken, ensuring a constant supply of electricity to the
load. I'm not sure how that would work since it would connect the two
power sources, but that is what he described.
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