Power cut if temps are too high

Wayne Bouchard web at typo.org
Tue May 28 07:13:39 UTC 2019


Time Delay Relays are available with fixed or variable settings. if
you're going the mechanical approach vs scripted monitor and SNMP sort
of trigger, you can use this to cause a standard relay or SCR to trip
to raise the alarm (and hopefully also flash a warning light and/or
audibly sound an alert where people are supposed to be) when both
sensors read positive and then have the TDR do its thing when the
timer expires.

Word of caution though... any system like this needs to have some sort
of a reset and bypass in case anyone can actually catch it before it
goes down and restore environmentals rather than taking the hard
outage since that alone does lots of damage to equipment that has been
in place for a good while. You also probably ought to make sure that
the present state of said system and its pieces are visible so you can
make sure you're going to restart correctly.

-Wayne

On Mon, May 27, 2019 at 06:20:36PM +0000, Mel Beckman wrote:
> We considered this approach, but we wanted to have notifications precede shut down, and give a remote support person the ability to prevent the shut down. Our SNMP based system gives us that option.
> 
>  -mel 
> 
> > On May 27, 2019, at 11:16 AM, Brian Kantor <Brian at ampr.org> wrote:
> > 
> > A simple air conditioner thermostat wired to the EPO switch.
> > For safety, wire two thermostats in series so BOTH have to trip
> > before power is shut off.
> > 
> > Note that the EPO rarely does an orderly shutdown, but then this
> > is a sort of an emergency.
> >    - Brian
> > 
> > 
> >> On Mon, May 27, 2019 at 02:00:39PM -0400, Dovid Bender wrote:
> >> Hi,
> >> 
> >> Is anyone aware of a device that will cut the power if the room goes above X
> >> degrees? I am looking for something as a just in case. 
> >> 
> >> 
> >> Regards,
> >> 
> >> Dovid
> >> 

---
Wayne Bouchard
web at typo.org
Network Dude
http://www.typo.org/~web/



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