Charles,
The request for a declaratory ruling applies to all frequency bands. The
bands of immediate interest are 3.7 to 4.2GHz and 5.9 to 6.4GHz (an easy
freq change for WiMax, 3.5GHz to 4GHz band and 5.8GHz to 6GHz band)where
the subordinated link antenna sizes drop from 8ft and 6ft to as low as
http://www.electricgeneratorsdirect.com/catalog/product_info.php?products_id=538
I'm in the market for a generator and came across this one.
The auto transfer switch and propane caught my eye and I figured I'd
share it with the list.
--
George Rogato
Welcome to WISPA
www.wispa.org
http://si
The Guardian comes as small as 7KW for about $2100 and goes up a long
way from there.
I have seen Guardians at cell sites and waste water lift stations around
here.
George Rogato wrote:
http://www.electricgeneratorsdirect.com/catalog/product_info.php?products_id=538
I'm in the market for a
George - Call me - Soon Sir !
337-764-5953
JohnnyO
- Original Message -
From: "George Rogato" <[EMAIL PROTECTED]>
To: "WISPA General List"
Sent: Saturday, June 30, 2007 11:27 AM
Subject: [WISPA] Low cost generator
http://www.electricgeneratorsdirect.com/catalog/product_info.php?pro
I have one at my house and have two at one of the data centers. Works great.
Im close to putting a couple more on rooftops.
--
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We have found many (most all?) <10kW "job site" type generators do not work
well if at all with APC UPS. In the event of a power failure we simply rent
a 25kW towable diesel generator. Granted 25kW is way overkill for most any
HUB site, but apparently the larger generators provide "cleaner" power
Brad,
You can adjust the sensitivity of the APC UPS's to handle just about
any type of incoming power. We have run a tower off a cheap Home Depot
2000watt by adjusting the APC so it would not keep switching off an on.
Travis
Microserv
Brad Belton wrote:
We have found many (most all?) <10k
Travis,
How do you go about tweaking a UPS? We use APC 750's at most small tower
sites. During the event of a power outage we use 1000watt generators but
as you said...the UPS just shuts off and on, repeatedly.
-Eric
Travis Johnson wrote:
Brad,
You can adjust the sensitivity of the APC UPS'
You can change this all via the APC management software.
-
Mike Hammett
Intelligent Computing Solutions
http://www.ics-il.com
- Original Message -
From: "Eric Muehleisen" <[EMAIL PROTECTED]>
To: "WISPA General List"
Sent: Saturday, June 30, 2007 12:23 PM
Subject: Re: [WISPA] Low
George/Mike: I worked for 6 years in deep UPS and
power quality at PG&E in Silicon Valley including
IEEE1159 and CBEMA curve. Our field work demonstrated
that if an automatic transfer does not take place at
one quarter of a cycle in a 60 cycle per second AC
power supply, then the sensitive logic
I was hoping to use my apc ups's inline with the back up generator.
Any reason why this won't work?
Felix A. Lopez wrote:
George/Mike: I worked for 6 years in deep UPS and
power quality at PG&E in Silicon Valley including
IEEE1159 and CBEMA curve. Our field work demonstrated
that if an autom
It should work, But In our particular case the
question was "what is the automatic transfer time
between the UPS inline with the backup generator?"
what is the switch over time??? And at what voltage
threshold does it switch. IEEE 1159 and the CBEMA
curve typically recommend to start looking at 65
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