Basics of Electrical Panel Cooling System

Basics of Electrical Panel Cooling System

In a previous video, we covered the
basics of an Electrical Control Panel. Now we’re going to take a closer look at some of the other important components
that go towards making up the panel. In this video, we are going to be
looking at the panel cooling system. We’re going to cover the
type of cooling used, how it functions,
and why we use cooling in the first place. But, before we get into the video, don’t forget
to like this video if you find it useful. This keeps us motivated to create more valuable
and easy to follow videos in the future. If we look at the panel from the front, on the left-hand door,
towards the bottom of the door, we have a cut-out and a
plastic cover on the outside. There is another one on the right-hand
door, towards the top of the door. When we open the doors, we can see that the one on the
left-hand door has a fan on the inside, and the one on the right has
nothing but the plastic vent cover. The cooling system works by sucking
in cool air at the bottom vent, and because heat rises, the hot air exits out of the top vent. To regulate the heat inside the panel,
it is fitted with an enclosure thermostat. “Why do we need to do this”? I hear you ask. Well, here is the answer. It really depends on what environment
our panel is going to be situated in. If the panel is going to be
housed in a warm control room, similar to where our panel
will be on a wastewater plant, then to maintain the integrity of
the components in the enclosure, we need to make sure that the ambient temperature
and humidity are taken into account. Also, when the panel is powered up, the components themselves generate heat, but to keep them in a safe working range, we sometimes need to make
sure that they are kept cool. Think of your house in the warmer months. The cooling fan on to keep you cool. On the other hand, in cold buildings with no heating and lots of moisture around, to keep the components dry and moisture free, we need to keep them warm. Think of your house in the colder months. Heating on to keep you nice and
warm and to remove moisture. An enclosure thermostat
works with a heating or cooling device to maintain a safe
working temperature within the enclosure and to safeguard against
condensation, humidity, and frost. They can be wired normally open or normally
closed, depending on the application. For a cooling application, it is used to switch on a fan when
the temperature is high and to reduce the enclosure temperature, it would be wired as a normally open. With the temperature rising, the contact will close once the
temperature rises above the set point. This would then enable the fan to operate. For a heating application, it is used to switch on a heater
when the temperature is low and to increase the enclosure temperature, it would be wired as a
normally closed switch. This means that the heater
is ON in normal mode. With the temperature rising,
the contact will open once the temperature
goes above the set point. This would then disable the heater. However, in our panel,
we are using a fan to cool the enclosure. The enclosure thermostat is
not connected to the PLC, but sometimes it can be to display an
enclosure internal temperature alarm. In this case, the enclosure thermostat is
connected directly to the fan on the door and switches on and off
independently of the PLC. That’s it for this video! Hopefully, now you’ve got a greater
understanding of control panel cooling systems, why we use them, and how they work! This video was brought to you by RealPars in partnership with Pro-control
here in the Netherlands. They are experts at control system
design and industrial automation. They have a team of world-class
automation engineers and have been designing and
implementing industrial control systems in different industries for many years. If you want to get in contact with them, you
can check out their website at That’s We will put a link to their website in
the description below the video as well. Ok, that’s all for today’s video. If you have learned something
new from this video, it would mean the world
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30 Replies to “Basics of Electrical Panel Cooling System”

  1. Thanks a lot …….i really enjoyed the video …..and i m also learning from real pars ……more things ……again thanks a lot

  2. Why do few fans suck while few blow? ( Like in my laptop the fan blows the hot air outside while in your case it's reverse)

  3. Thanks a lot
    I really learned
    I like the information content in your videos
    I want to learn plc technology
    Thanks a lot for the video
    Please upload the plc related automation videos
    You are doing a great work
    Thanks a lot

  4. Hey guys love ur videos I really would like for U guys to do a video on how brakes module works and dynamic braking system

  5. Why to use thermostat in cooling aplication? Why not to keep the FAN switched on constantly?

    Why the FAN was placed on the doors? Isn't it placing on the wall better for the circulation?

    What are other options for cooling other than fan?

  6. I have a problem with that, is there any code describe your theory because here in Egypt, we put the fan on the top of the panel and make the air flow inside the panel, so that the hot air keep in the bottom of the panel which rainforced to get out of the panel from a hole in the bottom when the fan rainforce fresh air from the top, I think this theory is accepted with the concept of that hot air lays in the bottom when cold air lays in the top.

  7. Hello, I wanna ask. If enviroment of control panel very corrossive how to place or manage the cooling fan so that electrical equipment in control panel not rusty. Thank you

  8. I'd like to know how a safety relay main module and its contactors work? And how apply them in an industrial machine! Thanks for the videos!!

  9. Why is it the outlet of the cooling system has an AirFilter on the outlet vs it being on the inlet and also the Fan on the outlet instead in design. I see this a lot as well. The Electrical Panel i'd think would easily get filled with dust and more with fan on inlet side vs on outlet side with Airfilter on the inlet side. Or does this has something to do with positive air pressure in the panel?

  10. Hey

    Interesting video
    I have a question on how to calculate the heat loss of element in electrical cabinet, to decide to use a fan or not.


  11. Thank you so much and I have a question. We use an UCP of dimensions (2000mmH×1200mmW×800mmD). The panel is located in outdoor environment under three sided built shade 0 to 55degC ambient temperature with 35% to 85% RH. We use vortex coolers of 2 number (Model 727-35H) 70SCF per minute of instrument air. We would like to optimize with other devices and replace the vortex coolers.
    Maximum power consumption by the panel is 800VA.
    What would be the best cooling system?
    Thanks in advance

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