BTW, the material that Jim Brown (K9YC) referenced from SurgeX is excellent.
In thinking the secondary suppressor problem through, I thought that only a
"single-mode" L-N bypass to neutral (rather than ground) would prevent a
ground potential rise between branch circuits. Those devices exist, but
apparently, they still do not provide as high degree of protection than the
technology used by SurgeX.
http://www.surgex.com/library.html
http://www.surgex.com/library/22001.html
http://www.surgex.com/library/32001.html
Also, Jim's related work on A/V power and grounding is referenced in the
SurgeX technical library. Pretty impressive, Jim! Looks like I may want to
"ditch" those expensive Leviton SPD receptacles after all...
Paul, W9AC
----- Original Message -----
From: "jimlux" <jimlux@earthlink.net>
To: "Tower and HF antenna construction topics." <towertalk@contesting.com>
Sent: Saturday, March 20, 2010 7:11 PM
Subject: Re: [TowerTalk] Shack wiring
> Jim Brown wrote:
>>
>> As to the IEEE -- I have the Green Book and the Emerald Book, which are
>> their
>> Standards on Power and Grounding. Both were written before the
>> development of
>> series mode surge suppression, and neither of them considers equipment at
>> different locations that has low voltage interconnections.
>>
>
> the newer Emerald books are substantially different than the older ones
> (for one thing, they don't say "sensitive electronic equipment" any
> more... the mfrs complained that they didn't want their equipment being
> thought of as "sensitive")
>
> IEEE 1100-2005 recommended practice for Powering and Grounding
> Electronic Equipment.
>
> (there might be a newer one coming out.. I think it's every 6 years or so)
>
> Section 4.8 is all about single point grounds, signal reference systems,
> etc.
>
> Section 4.10 on surge suppressors is pretty sketchy, dealing only with
> the various shunt mode devices.
>
> I like Standler's book on this topic. he covers series mode transient
> suppression, the problems with shunt mode (e.g. inducing a transient
> after the suppressor by induction, etc.)
> _______________________________________________
>
>
>
> _______________________________________________
> TowerTalk mailing list
> TowerTalk@contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk
>
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
|