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#25244 - 05/02/03 04:33 PM Transient Voltage Surge Suppressors  
Frank Cinker  Offline
Member
Joined: Jul 2001
Posts: 311
Pennsylvania
I'm trying to find an article about the importance of TVSS. I looked at EC&M, IAEI and Electrical Contractor magazines online and thought I could do a search but I couldn't. I remember reading one of them late last year with an excellent article in in. Can anyone remember?


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#25245 - 05/02/03 05:37 PM Re: Transient Voltage Surge Suppressors  
CDN_ELECTRICIAN  Offline
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Joined: Jan 2003
Posts: 73
Concord,Ontario,Canada
Don't know if this is what your looking for as to what detail but might help. http://www.ecmweb.com/ar/electric_demystifying_tvss/


#25246 - 05/02/03 10:58 PM Re: Transient Voltage Surge Suppressors  
Bjarney  Offline
Moderator
Joined: Apr 2002
Posts: 2,527
West-Southern Inner-Northeast ...
Another site that has discussed TVSS application is the online version of [no longer published] Power Quality magazine. I believe their owner is also a parent of EC&M.


#25247 - 05/04/03 07:25 PM Re: Transient Voltage Surge Suppressors  
DBC1  Offline
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Joined: Mar 2003
Posts: 16
Tulsa, OK USA
The best application data is from IEEE document C61.42-1991. Unless the devices are properly sized, located, and installed they are worthless.

The IEEE document will define class C, B, and A devices, there location specifics, sizes, and most importantly the installation specifications.


#25248 - 05/04/03 08:08 PM Re: Transient Voltage Surge Suppressors  
Bjarney  Offline
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Posts: 2,527
West-Southern Inner-Northeast ...
DBC1, the standard may be IEEE C62.41-1991 Recommended Practice for Surge Voltages in Low-Voltage AC Power Circuits

Fair warning — This is a heavy-duty text; not for the casual reader. [$150]




[This message has been edited by Bjarney (edited 05-04-2003).]


#25249 - 05/05/03 07:10 PM Re: Transient Voltage Surge Suppressors  
DBC1  Offline
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Joined: Mar 2003
Posts: 16
Tulsa, OK USA
Bjarner, oops a little dyslexia problem. It is C62.41


#25250 - 05/06/03 07:43 AM Re: Transient Voltage Surge Suppressors  
Frank Cinker  Offline
Member
Joined: Jul 2001
Posts: 311
Pennsylvania
DBC1-

In general, how is a TVSS sized?


#160808 - 03/26/07 07:01 AM Re: Transient Voltage Surge Suppressors [Re: Frank Cinker]  
SteveFehr  Offline
Member
Joined: Mar 2005
Posts: 1,198
Chesapeake, VA
Originally Posted by Frank Cinker
DBC1-

In general, how is a TVSS sized?
It's funny, I'm wondering the exact same thing, nearly 4 years later. Near as I can tell, every TVSS on the market is oversized about 10-100x greater than the most powerful transients experienced short of a nuclear HEMP attack; I imagine it's just a natural byproduct of sizing MOVs for clamping voltage, and many places don't even mention the Joule rating. Oversizing by 10x does seem to increase longevity, though- an 8J module might protect against 1 bad lightning strike, but an 800J module will take them repeatedly and never burn out. So... so long as it's got the right voltage and KAIC rating, it's going to protect your system.

I have those IEEE reports, btw- the one most often cited is merely a report of measured transient reponses and more useful for people designing TVSSs than people trying to figure out which one to buy.



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