Sorry, I should have posted this page. no moving parts.
http://www.idatech.com/ Tom DeReggi wrote: > Patrick, > > All excellent points, and reality checks. Thanks for the feedback! > > > Tom DeReggi > RapidDSL & Wireless, Inc > IntAirNet- Fixed Wireless Broadband > > > ----- Original Message ----- > From: "Patrick Shoemaker" <shoemak...@vectordatasystems.com> > To: "WISPA General List" <wireless@wispa.org> > Sent: Monday, August 03, 2009 5:58 PM > Subject: Re: [WISPA] Small auto start generator > > > >> I think you'll find that to get a propane/NG generator installed on a >> commercial building rooftop, you'll be looking at $10k minimum using >> even the cheapest Generac air-cooled units. You'll need a roofing >> company to come out and modify the roof to provide a mounting surface >> for the generator, that will probably be the biggest cost. Getting >> management comfortable with modifying a $300k roof membrane could be an >> issue as well. Then getting gas to the unit from the building's gas >> supply will require a plumbing contractor, permits, inspections. Then >> the electrical hookup- more permits and inspections and a licensed EC. >> >> I just got a quote for qty 8 110AH 12v AGM batteries for a new site: >> $1500 including shipping. >> >> A note on the Generac air-cooled generators. They break. All generators >> break. The key is routine testing and PM. The generac air-cooled models >> don't have any provision for automatic alarm reporting. So when a >> battery dies or gas valve sticks or spark plug fouls or whatever, you >> won't know about it until a manual site inspection or the power goes >> out. The better generators (and the Generac liquid cooled models) have >> contact closures or RS232 interfaces to report these conditions to your >> site monitoring system, in turn notifying you back at the NOC. >> >> >> Patrick Shoemaker >> Vector Data Systems LLC >> shoemak...@vectordatasystems.com >> office: (301) 358-1690 x36 >> http://www.vectordatasystems.com >> >> >> Tom DeReggi wrote: >> >>> We also use the triplite APS inverters with good quality Gel cell. >>> Actually, >>> we got a good 15 years out of the existing C&D batteries, because we >>> inherited them from Teligent days :-) >>> But new, qty 4- 12V 150AH batteries in series for about 3500watt and >>> decent >>> run-time is $1400. + $800 for replacement inverters. (The Triplites >>> worked >>> really well, but about half of them died by the end of eight years. We >>> matched good inverters with good pre-existing batteries and vice versa.) >>> So >>> our thought was.... Why not buy a $2000 generator for the run-time and >>> load, >>> and then several smaller UPSes for infront to cover the surges, power >>> conditioning, and monitoring? Ones that keep running even when batteries >>> short out. Part of the reason we are investigating is that we now have >>> duplicate need of devices to power. Some are AC devices like PC routers. >>> Some are 20-24VDC w/AC adapters. Some are new licensed gear running on >>> 48V. >>> Cost is increased having long battery run time on both seperate AC and DC >>> backup power subsystems. And how do we plan for load growth? How many new >>> radios installed will be AC or DC? Unlicensed versus Licensed? We really >>> dont know in advance. There is a lot of power waste going from AC to DC >>> to >>> AC to DC. >>> >>> The thought was... If long run time was accomplished by the propaine >>> generator, both DC and AC battery subsystems could be installed with >>> lower >>> cost lower run-time batteries. We'd still need to account for max watts >>> growth for each subsystem, but we could way reduce AH requirements for >>> both >>> subsystems. >>> >>> Or am I making this to complicated, and better just sticking with >>> batteries >>> :-) >>> >>> Chris Erikson's idea on solar panels sounded interesting. Although, I bet >>> my >>> ruthless roof rights people will try to charge me a monthly colo fee for >>> them :-( >>> I wonder if I can make the solar panels look like rain/weather shields >>> :-) >>> >>> Tom DeReggi >>> RapidDSL & Wireless, Inc >>> IntAirNet- Fixed Wireless Broadband >>> >>> >>> ----- Original Message ----- >>> From: "jp" <j...@saucer.midcoast.com> >>> To: "WISPA General List" <wireless@wispa.org> >>> Sent: Monday, August 03, 2009 12:11 PM >>> Subject: Re: [WISPA] Small auto start generator >>> >>> >>> >>>> The tripplite APS is what we use for this. Small generators are a pain. >>>> >>>> On Sun, Aug 02, 2009 at 02:57:23PM -0430, os10ru...@gmail.com wrote: >>>> >>>>> You might want something like an inverter (Xantrex for example) which >>>>> includes a DC to AC inverter, battery charger, and automatic transfer >>>>> switch. Add the batteries and you're done. >>>>> >>>>> Greg >>>>> >>>>> On Aug 2, 2009, at 2:38 PM, Jerry Richardson wrote: >>>>> >>>>> >>>>>> Thank you, >>>>>> That is very good advice. After some research, I'm leaning toward a >>>>>> UPS. >>>>>> >>>>>> A pair of good AGM batteries and charge controller will cost less >>>>>> and be far less maintainence. Then I'd just run the CMM off the >>>>>> batteries @ 24VDC. >>>>>> >>>>>> Thanks again >>>>>> Jerry >>>>>> >>>>>> >>>>>> -----Original Message----- >>>>>> From: wireless-boun...@wispa.org [mailto:wireless-boun...@wispa.org] >>>>>> On Behalf Of Gary Garrett >>>>>> Sent: Sunday, August 02, 2009 11:59 AM >>>>>> To: WISPA General List >>>>>> Subject: Re: [WISPA] Small auto start generator >>>>>> >>>>>> Small generators do not auto start very reliably. >>>>>> When cold or dampness causes hard starting the starter can overheat >>>>>> and >>>>>> burn out. Generally you need an electric choke to start gas engines, >>>>>> propane can "flood" and need to rest before trying again, diesel can >>>>>> be >>>>>> REAL hard to start when cold. Auto starters can not adapt to changing >>>>>> conditions. >>>>>> Our best generator is a Propane Ford inline 6 cyl. 25 KW 3 phase. >>>>>> (1955 >>>>>> Model) >>>>>> The monitor cranks for 1 min then rests and tries 3 times. >>>>>> Everything is >>>>>> adjustable. It knows to stop cranking when it sees AC voltage from the >>>>>> Gen. so the motor over runs the starter for just a few seconds. Only a >>>>>> huge starter motor can take this abuse and last unattended. >>>>>> >>>>>> You may be money ahead to find out why the existing generator is not >>>>>> starting and get it fixed. >>>>>> >>>>>> Jerry Richardson wrote: >>>>>> >>>>>>> We rent on a tower that is suspposed to have gen-set backup but it >>>>>>> does not start reliably. >>>>>>> >>>>>>> Any recommendations on a small auto-start generator? We only need >>>>>>> to power a CMMmicro - ~100watts. >>>>>>> >>>>>>> Thanks >>>>>>> >>>>>>> >>>>>>> >>>>>>> __________________________________ >>>>>>> Jerry Richardson >>>>>>> airCloud Communications >>>>>>> >>>>>>> >>>>>>> >>>>>>> >>>>>>> -------------------------------------------------------------------------------- >>>>>>> WISPA Wants You! Join today! >>>>>>> http://signup.wispa.org/ >>>>>>> -------------------------------------------------------------------------------- >>>>>>> >>>>>>> WISPA Wireless List: wireless@wispa.org >>>>>>> >>>>>>> Subscribe/Unsubscribe: >>>>>>> http://lists.wispa.org/mailman/listinfo/wireless >>>>>>> >>>>>>> Archives: http://lists.wispa.org/pipermail/wireless/ >>>>>>> >>>>>>> >>>>>> -------------------------------------------------------------------------------- >>>>>> WISPA Wants You! Join today! >>>>>> http://signup.wispa.org/ >>>>>> -------------------------------------------------------------------------------- >>>>>> >>>>>> WISPA Wireless List: wireless@wispa.org >>>>>> >>>>>> Subscribe/Unsubscribe: >>>>>> http://lists.wispa.org/mailman/listinfo/wireless >>>>>> >>>>>> Archives: http://lists.wispa.org/pipermail/wireless/ >>>>>> >>>>>> >>>>>> -------------------------------------------------------------------------------- >>>>>> WISPA Wants You! Join today! >>>>>> http://signup.wispa.org/ >>>>>> -------------------------------------------------------------------------------- >>>>>> >>>>>> WISPA Wireless List: wireless@wispa.org >>>>>> >>>>>> Subscribe/Unsubscribe: >>>>>> http://lists.wispa.org/mailman/listinfo/wireless >>>>>> >>>>>> Archives: http://lists.wispa.org/pipermail/wireless/ >>>>>> >>>>> -------------------------------------------------------------------------------- >>>>> WISPA Wants You! Join today! >>>>> http://signup.wispa.org/ >>>>> -------------------------------------------------------------------------------- >>>>> >>>>> WISPA Wireless List: wireless@wispa.org >>>>> >>>>> Subscribe/Unsubscribe: >>>>> http://lists.wispa.org/mailman/listinfo/wireless >>>>> >>>>> Archives: http://lists.wispa.org/pipermail/wireless/ >>>>> >>>> -- >>>> /* >>>> Jason Philbrook | Midcoast Internet Solutions - Wireless and DSL >>>> KB1IOJ | Broadband Internet Access, Dialup, and Hosting >>>> http://f64.nu/ | for Midcoast Maine http://www.midcoast.com/ >>>> */ >>>> >>>> >>>> -------------------------------------------------------------------------------- >>>> WISPA Wants You! Join today! >>>> http://signup.wispa.org/ >>>> -------------------------------------------------------------------------------- >>>> >>>> WISPA Wireless List: wireless@wispa.org >>>> >>>> Subscribe/Unsubscribe: >>>> http://lists.wispa.org/mailman/listinfo/wireless >>>> >>>> Archives: http://lists.wispa.org/pipermail/wireless/ >>>> >>> >>> -------------------------------------------------------------------------------- >>> WISPA Wants You! Join today! >>> http://signup.wispa.org/ >>> -------------------------------------------------------------------------------- >>> >>> WISPA Wireless List: wireless@wispa.org >>> >>> Subscribe/Unsubscribe: >>> http://lists.wispa.org/mailman/listinfo/wireless >>> >>> Archives: http://lists.wispa.org/pipermail/wireless/ >>> >> -------------------------------------------------------------------------------- >> WISPA Wants You! Join today! >> http://signup.wispa.org/ >> -------------------------------------------------------------------------------- >> >> WISPA Wireless List: wireless@wispa.org >> >> Subscribe/Unsubscribe: >> http://lists.wispa.org/mailman/listinfo/wireless >> >> Archives: http://lists.wispa.org/pipermail/wireless/ >> > > > > -------------------------------------------------------------------------------- > WISPA Wants You! Join today! > http://signup.wispa.org/ > -------------------------------------------------------------------------------- > > WISPA Wireless List: wireless@wispa.org > > Subscribe/Unsubscribe: > http://lists.wispa.org/mailman/listinfo/wireless > > Archives: http://lists.wispa.org/pipermail/wireless/ > -------------------------------------------------------------------------------- WISPA Wants You! Join today! http://signup.wispa.org/ -------------------------------------------------------------------------------- WISPA Wireless List: wireless@wispa.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/
