Every time I've had lightning damage my UPS is uneffected. APC and no-name brands.
On 8/6/09, Scottie Arnett <[email protected]> wrote: > Whats the majority think the equipment damage from lightning comes > from...electric surge or coupling on the Ethernet? Will running on battery > or solar lessen your chances of equipment damage that much more that it is > worth the cost? I am in the same boat as these guys and have one location > hit 5 times in the last two years that caused major damage(talking SMOKED > AP's), more than that if you just include power supplies and switches. > > I was thinking of grounding the crap out of this location, but it looks like > David did that and it did not help much. > > Scottie > > ---------- Original Message ---------------------------------- > From: David Hulsebus <[email protected]> > Reply-To: WISPA General List <[email protected]> > Date: Thu, 06 Aug 2009 11:09:58 -0400 > >>I looked at a Transtector unit a few weeks ago. It's an isolation >>transformer that sits outdoors between the entrance panel and our >>internal electrical system. It was roughly $1K for the unit. Kind of >>wish I would have bought it now. We are the end of the line on the power >>grid and have 1-3 days of outages multiple times a year, that's the real >>reason for the battery solution; that and we are tired of generators. >> >>Your right though. Most cell and radio towers I visit have just that, an >>isolation transformer at the entrance panel. >> >>Thanks, Dave >> >>[email protected] wrote: >>> Since it sounds like this came in on the AC, how about a surge protector >>> on incoming AC line? We've had sites where the power company's grounding >>> is so bad we've lost power supply surge protectors in just about every >>> storm that comes through the area...until we put surge protection at the >>> breaker box. Now all is good. >>> >>> Cameron >>> >>> >>>> Don't feel too left Chuck out we lost a tower site in the same storm. >>>> Second time in seven years a total loss. Both times we've lost our gear >>>> it has come via the electrical side. Our tower gets hit by a strike or >>>> two almost every storm and we never have issues. This time it literaly >>>> blew the entrance panel off the side of the building and outlets off the >>>> walls of the building. Cracked one of the APC batterty units, every >>>> ethernet surge suppressor and every grounded POE injectors were blown >>>> apart. Interesting that our four coax arrestors were okay, but the gear >>>> was cooked. Most of the cat5 ends included. Had spare gear on the >>>> tower plugged in at the radios but dangling in the building, we fired it >>>> up and were in operation within a few minutes. Took another 16 hours to >>>> get all of the damage cleaned up. >>>> >>>> We have on that site forty-five 3/4" ground rods in two concentric >>>> circles around the tower and building none more than eight feet apart; >>>> all interconnected with #2 bare stranded wire and cad welded. Inside the >>>> building - a halo ring and 3 1/2" copper strapping, the list goes on and >>>> on for what we have done to minimize issues. We spent nearly 5K on >>>> grounding and still lost it all. >>>> >>>> We are moving to total battery power next week. I am looking for >>>> something I can use to isolate a smart charger from the power company >>>> when we see storms in the area, I expect we will have enough battery for >>>> a minimum 3 days runtime. Some type of relay that we can control >>>> remotely I would guess. >>>> >>>> If it makes you feel any better Verizon Wireless took total loses on >>>> four towers between Cincinnati and Louisville Tuesday as well. >>>> >>>> Dave Hulsebus >>>> Portative Technologies, LLC >>>> >>>> Chuck Hogg wrote: >>>> >>>>> Has anyone been able to withstand a direct lightning strike? We had a >>>>> tower get hit last night, and some of our equipment lost Ethernet ports >>>>> (RB/433AH), and we lost 3 canopy APs, but that is all (considering what >>>>> is all up there only 2/3rds was blown). Our Trango AP survived and a >>>>> RB/433AH survived. Even Nextel had their guys out there, but they just >>>>> had to reset alarms it appears as nothing was "fried" on their end. I >>>>> wish I had to just reset alarms. >>>>> >>>>> >>>>> >>>>> So tell me, what do you do ? I'm tired of dumping a few grand during >>>>> big >>>>> lightning storms. >>>>> >>>>> >>>>> >>>>> I do the basics, Ethernet surge suppression up top and on the bottom, >>>>> Polyphasers, ground out to the ground bars, ground out the cat5 cable, >>>>> and no omni's. >>>>> >>>>> >>>>> >>>>> Regards, >>>>> >>>>> Chuck Hogg >>>>> >>>>> Shelby Broadband >>>>> 502-722-9292 >>>>> [email protected] >>>>> >>>>> http://www.shelbybb.com >>>>> >>>>> >>>>> >>>>> >>>>> >>>>> -------------------------------------------------------------------------------- >>>>> WISPA Wants You! 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