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Effective Selective Coordination Set-ups - Pt. 1Author: Chris B Posted Date: 3/11/2010 10:19:06 AM
It doesn't matter much what kind of building you're talking about; an office building, plant, high-rise apartment complex, hospital, or a theater. You need a quality electrical distribution system in all of these. There's nothing more effective than a power failure in stirring up anxiety, wreaking havoc, and causing overall panic because of its unexpectedness. It's exactly why the NEC has called for Selective Coordination for such a long time.
Without properly isolated faulted circuit from all of the other components in an electrical system, you're setting yourself up for many guaranteed power blackouts. Here's a pretty clear illustration of what effective selective coordination is able to do:
The system on the right is obviously 100% more desirable. You have only one circuit (the one with the fault) being affected. The rest of the power system isn't even touched - nothing, nada, zip. There's absolutely no interruption in the rest of the system. And that, in turn, means no unneeded risk of a blackout.
Next time, I'm going to cover some of the popular methods used in determining selective coordination quality in an existing system. Stick around for that because I'll be giving some thoughts on what's really the best way. Comments (0) | Leave Comments |  Permalink buldings, selective corrdination, electrical distribution, quality, power, blackouts, faults, nec 2008
9/6/2010 7:29:24 PM
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