We've deployed the MX480s as PEs in multiple countries, and have been
pretty damn happy with them for the most part.
Any issues we've seen (largely around interface counters/statistics etc)
can be chalked up to an older JunOS version that we're running.
The CLI is shiny, and easy to use, and
In a message written on Sat, Jun 25, 2011 at 03:32:09PM -0700, Seth Mattinen
wrote:
Most of these come in open, delayed, or closed transition models:
http://www.gedigitalenergy.com/powerquality/ATSHome.htm
I think we're missing something, which is where these ATS's are
installed.
I don't
On Sun, Jun 26, 2011 at 05:27:10AM -0700, Leo Bicknell wrote:
It's not that you couldn't install a closed transition ATS in the
ATS 1a/1b location from an electrical point of view, but I don't
think codes, power companies, or common sense make it a good idea.
As others have pointed out, the
It makes little sense to sync to the grid when the generator is only
used when the grid is down - and unless you run your generators 24/7
your UPS will have to make up for the comparatively long time it takes
for the generator to start, so it's rather useless to sync the
generator when the
I think we're missing something, which is where these ATS's are
installed.
I don't think most utilities allow (largeish) ATS's to do a closed
transition from a genset to the utility grid, but I may be wrong.
There may be other ATS's in your facility that do a closed transition
though. For
Another couple of reasons to use a delayed transition ATS:
1) Motor lock. Delays on HVAC equipment never get triggered if the system never
goes offline. Having a correct open period allows the motors to spin down,
and start back up on the delays that are programmed keeping them from being
- Original Message -
From: Michael DeMan na...@deman.com
It is my understanding also that most commercial grade gensets have
built into the ATS logic that when utility power comesback online,
that the transfer back to utility power is coordinated with the ATS
driving the generator
- Original Message -
From: Jeff Wheeler j...@inconcepts.biz
On Sun, Jun 26, 2011 at 12:23 AM, Alex Rubenstein a...@corp.nac.net
wrote:
At least here in JCPL territory (northern NJ), closed transition is
frowned upon. Too much risk, they think. They are correct, really,
but the
It makes little sense to sync to the grid when the generator is only
used when the grid is down
I don't know what large DC do but at our large sites we normally get
power cheaper in exchange for a load shed agreement.
When we got the call we ran some/all of the load on generator so the
grid
Take a guess what the datacenter our equipment is currently hosted in uses.
Yet another reason to be glad of a datacenter move that's coming up.
Why can't we just all use DC and be happy?
motors don't produce DC?
dc generators produce dc.
tesla vs edison?
human safe dc voltage requires
2) Allowing transformer fields to collapse. Even in phase, without a
delayed transition ATS you can end up with a partially collapsed
transformer field with a new field being created at non-ground state.
This can cause a transient back wave that can snap circuit breakers.
Yep, this one
On Sun, Jun 26, 2011 at 11:36:24PM +0200, Ingo Flaschberger wrote:
but transforming is not easy.
ac/ac transformers are easy tu build and very immune against lightning
strikes - inverter systems are not.
Switching DC is also problematic since there is no zero crossing to
extinguish the arc.
On 06/26/2011 05:43 PM, Ingo Flaschberger wrote:
2) Allowing transformer fields to collapse. Even in phase, without a
delayed transition ATS you can end up with a partially collapsed
transformer field with a new field being created at non-ground state.
This can cause a transient back wave that
On 06/26/2011 05:55 PM, Jussi Peltola wrote:
On Sun, Jun 26, 2011 at 11:36:24PM +0200, Ingo Flaschberger wrote:
but transforming is not easy.
ac/ac transformers are easy tu build and very immune against lightning
strikes - inverter systems are not.
Switching DC is also problematic since
Hi,
Yes, transforming DC is not easy.
However, DC works good at long haul transmission because a lot of energy is
lost in the revers EMF generated by AC a several hundred volts. Some years ago
a high voltage DC line was constructed between Oregon and California to deliver
power to
On Sun, Jun 26, 2011 at 06:46:09PM -0400, Pete Carah wrote:
HVAC compressors have their own problems; once fully stopped you have
to wait for the liquid to clear the compressor before restarting, or
have LOTS of torque (like a car unit) available (and a supply of new
belts :-)
[begin OT
Hi all
I am trying to configure website for testing ipv6
Just wander how internet users eg: DSL users can visit this website
and any people can access this website over the world
Thank you
On Sun, 26 Jun 2011, Deric Kwok wrote:
I am trying to configure website for testing ipv6
Just wander how internet users eg: DSL users can visit this website
and any people can access this website over the world
1. Your web server (operating system, too) needs to be IPv6 enabled.
2. You
In message banlktikzmcshaxffwq2pidfpkxctqtr...@mail.gmail.com, Deric Kwok wr
ites:
Hi all
I am trying to configure website for testing ipv6
Just wander how internet users eg: DSL users can visit this website
and any people can access this website over the world
Thank you
About 10-6%
In message 20110627002625.4c8531137...@drugs.dv.isc.org, Mark Andrews writes
:
In message banlktikzmcshaxffwq2pidfpkxctqtr...@mail.gmail.com, Deric Kwok
wr
ites:
Hi all
I am trying to configure website for testing ipv6
Just wander how internet users eg: DSL users can visit this
On Sat, Jun 25, 2011 at 9:39 PM, Joel Jaeggli joe...@bogus.com wrote:
On Jun 25, 2011, at 6:03 PM, Deric Kwok wrote:
Can we use same AS to advertise different networks in different location?
Assuming you want the two instances to be able talk to each other you just
have to relax loop
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