topic Re: Two lightning arrestor part numbers in Wireless

Two lightning arrestor part numbers

Bojan Zivancevic — Sun, 04 Jul 2021 18:07:15 GMT

What is the difference between AIR-ACC3354 and AIR-ACC245LA-R? The price is the same and I am wondering what should I purchase. The intended usage is simple - a 1310 bridge with external antenna that needs to be protected from the lightning strikes.

Thanks

Re: Two lightning arrestor part numbers

scottmac — Mon, 12 Sep 2005 23:05:07 GMT

I can't see much difference. they're both kits, both go to 5850MHz, both are RP-TNC in and out.

There aren't any real good pictures, perhaps one is a bulkhead mount and the other only has a grounding lug.

References to that effect are the only difference in the text I found ... nothing very clear though.

BTW: Nothing that small is going to protect you from lightning. It will bleed some static from blowing dust/snow, it might save you from some pulse damage from a ~near hit ... if you get a direct hit, your network will fry .... all of it.

Your best protection is a segment of fiber between your network and the link to the external equipment.

Use of a 100BASE-TX to 100BASE-FX converter with a segment of fiber will completely isolate your network from the dangerous elements (through the antenna cable .... power may be a different issue).

If I can find anything else, I'll post it up.

Good Luck

Scott

Re: Two lightning arrestor part numbers

Bojan Zivancevic — Tue, 13 Sep 2005 05:29:15 GMT

Thanks for the detailed post.

Today I saw one other difference in the explanation of these arrestors. 3354 is the arrestor with "EMP grounding ring" - apart from the grounding lug that both products have. But how it's installed - beats me.

About the fiber isolation method - that's already taken care of, but thanks anyway. 🙂

Re: Two lightning arrestor part numbers

scottmac — Tue, 13 Sep 2005 13:23:14 GMT

The grounding ring would be used for the bulkhead mount.

The bulkhead is frequently a copper plate that the arrestor fits into (kind of like a spark plug). Instead of grounding directly to the arrestor, you ground the feedthrough plate and it can handle the grounding for multiple feeds.

FWIW

Scott