Outdoor enclosure for WRAP based applications

[Radiotka]

Hi, this is our recent design intended for hard climatic conditions, there are two fans, thermostat, 48V PoE and other features inside of box.

http://www.exergia.biz/ptp/im/exap-G6.jpghttp://www.exergia.biz/ptp/im/exap-G1.jpg

more at : http://www.exergia.biz/EXAP-GM/index.htm

[go.fast]

Very interesting indeed.
But what stops water from getting in the top?
I've been doing this:
http://www.oregonfast.net/gofast/EZbox/

But I like yours alot.
George

[Radiotka]

Well, both of plates are deadly mounted with elastic, springy watertight glue, but in some cases we supply lower plate with closed-pore rubber hermetic gasket, that is looking approximately like on this picture

http://www.exergia.biz/images/MVC-014F.JPG

[rmiller007]

But what stops water from getting in the top?

I'm curious myself.

From the pictures, it looks like that heat sink or fan is actually vented to the outside? Is that the case? And if so, what prevents water from traveling through the vent?

Do the boxes have a NEMA rating?

The other thing that has me wondering is that it says they perform to -40C. That's Awesome, but how did you do it? I don't see anything about a heat source and I don't see any box insulation. I'm not saying it doesn't work, I just wondered how. Are you running the fan inside the box to create heat or do the contents just generate enough heat to keep the inside above freezing?

[szern]

Will you sell these outdoor enclosures separately?
If yes, how much?

They look awesome! especially with heating and fan :)

- Szern

[Radiotka]

I'm curious myself.
From the pictures, it looks like that heat sink or fan is actually vented to the outside? Is that the case? And if so, what prevents water from traveling through the vent?

No, it is not, there is no additional holes in enclozure, only one hole intended for cable.

Do the boxes have a NEMA rating??

No, I do believe it is not so necessary for Hammond's aluminum extruded boxes.

The other thing that has me wondering is that it says they perform to -40C. That's Awesome, but how did you do it? I don't see anything about a heat source and I don't see any box insulation. I'm not saying it doesn't work, I just wondered how. Are you running the fan inside the box to create heat or do the contents just generate enough heat to keep the inside above freezing?

It will take a long time to explain using thermal balance equations :-), but shortly, when it's hot box works as a heatsink, when it's cold, as a thermos. Fans will work only in high temperature, they intended to make outside and inside temperature equal to each other.

Two simple examples:
1.now is winter. 20 WRAP based devices have been working in Siberia for a three months. As you know, Siberia is extremely cold place. Hence, this devices successfully survive in cold.
Sorry, we have no one picture from Siberia. Digital cameras do not work outdoors at Siberian winter :-).
2. Couple of such devices (I mean boxes), have been working in Africa, pictures: http://www.exergia.biz/small/page_01.htm.
This boxes have simple office PRISM radio inside !!!.

Many of these devices work in Mexico, pictures:
http://www.exergia.biz/small/page_02.htm

We have experience with 40 links (already installed, 1-2 year running) on Caspian Sea shelf, used by Hurricane and Shell Oil companies working in Kazakhstan, this place is extremely hot.

Will you sell these outdoor enclosures separately?
If yes, how much?
All question with "how much", "sell", (money related) please send to sales :-)