Surge suppressors

[Joel Jaeggli]

Our's are all on UPS so we just use distribution plug strips...

a surge protecter is in most cases just a MOV metal-oxide-varisistor. 
surge protection and line conditioning are two different exercises...

On Thu, 24 Oct 2002, David Mathog wrote:

> What brand surge suppressors are commonly used in clusters?  
> 
> Tripplite 6 outlet Isobar Ultras jave worked well
> on other equipment but these are only rated for 12A.

noise filters and surge supression.

the isobar 12/20r model is rated at 20 amps... we have a few o those in 
our telco facity for power distribution.

> With 5 x 300W power supplies plugged in they'd be running
> very close to their limit (5*300/120 = 12A).
> But maybe that's too pessimistic.  Each node holds a Tyan 2466
> Mobo, one MP2000+ processor, one 40Gb IDE disk, a floppy, 1 Gb
> ECC RAM, 3 fans, and a cheap VGA card.  So it probably doesn't
> draw anywhere near 300W except possibly when the
> power is first turned on.

propably less than 130 the cpu by itself is around 70w

>  The surge suppressor should be 
> rated high enough to handle the load if/when we add the
> second CPU in each node.

probably around 200w

> Each circuit has a 20Amp breaker, 20 Amp rated wiring, NEMA
> 5-15P sockets (could be upgraded to NEMA 5-20P for a nominal
> amount.)  4 circuits are available.
> 
> 
> Thanks,
> 
> David Mathog
> mathog at caltech.edu
> Manager, Sequence Analysis Facility, Biology Division, Caltech
> _______________________________________________
> Beowulf mailing list, Beowulf at beowulf.org
> To change your subscription (digest mode or unsubscribe) visit http://www.beowulf.org/mailman/listinfo/beowulf
> 

-- 
-------------------------------------------------------------------------- 
Joel Jaeggli	      Academic User Services   joelja at darkwing.uoregon.edu    
--    PGP Key Fingerprint: 1DE9 8FCA 51FB 4195 B42A 9C32 A30D 121E      --
  In Dr. Johnson's famous dictionary patriotism is defined as the last
  resort of the scoundrel.  With all due respect to an enlightened but
  inferior lexicographer I beg to submit that it is the first.
	   	            -- Ambrose Bierce, "The Devil's Dictionary"