[TowerTalk] Best choice for AC Service Entrance TVSS?

[Josh Kelly]

MOV devices don't really "age" so much as they wear out after diverting
multiple surges.  The Motorola R56 specs recommends MOV based devices for AC
service entrance protection for typical buildings.  For mission critical
applications (dispatch centers, data centers, etc) they recommend the
Silicon Avalanche Diode based devices. They don't recommend any type
of suppressor that uses gas discharge tubes.
At television broadcast towers we are using very large LEA International DS
Series protectors which utilize MOV, SAD, and LC filtering.  They seem to
work, but they are about 3 x 6 feet and weigh 500+ pounds.  It took a chain
hoist to get them into position to mount them to the wall.

I use one of their smaller panel mount protectors at home and at a couple of
smaller TV translator facilities.  Never had an issue with them.

73
Josh
W0HC


On Wed, Sep 16, 2009 at 12:54 PM, <towertalk-request at contesting.com> wrote:

> Date: Wed, 16 Sep 2009 13:41:07 -0400
> From: Mat Eshpeter <kk1c at live.com>
> Subject: [TowerTalk] Best choice for AC Service Entrance TVSS?
> To: <towertalk at contesting.com>
> Message-ID: <BLU121-W109DA5A00B80478E1BECF5F1E20 at phx.gbl>
> Content-Type: text/plain; charset="iso-8859-1"
>
>
> I am building a hilltop cabin for HF operation and need to select my
> desired lightning protection for the AC service entrance. I have read that
> the MOV devices age and eventually need to be replaced, whereas the silicon
> versions (like the ones from Transtector) do not. The information at this
> site appears to be the most helpful and recommends silicon devices from
> Transtector, but I have a feeling that it will be a very expensive solution
> (http://members.cox.net/pc-usa/station/basics.htm).
>
>
>
> I have been searching for more information on this topic but it appears to
> be difficult to find, hence my appeal to this forum for recommendations
> and/or advice as I am running out of time and need to make a decision soon.
>
>
>
> Thanks for any guidance.
>
> mat
>
> KK1C
> *****************************************
>