Does it get too hot or too cold in your control cabinets?


Reading time: 4 minutes

The aim of thermal management is to guarantee optimised climatic conditions inside control cabinets or technical installations and to ensure that electronic components function reliably in the long term. This is done using tried-and-tested temperature and humidity control systems. Find out more on this topic in our blog post.


STEGO regulates that for you!

As a rule, there are two possibilities: inside a control cabinet, enclosure or technical installation space, it is either … too cold or too hot. 


It's too cold

And that's not good. Cool air inside the control cabinet leads to the risk of humidity condensing, dripping down onto sensitive components and causing a short circuit. In this case, it’s clear that you will need a heater inside your application. After identifying the required heating capacity, the appropriate heater is procured. 

But what next? Our in-house specialists will be on hand to help, as this problem can easily be regulated – quite literally! As a leading provider of enclosure thermostats, our range is bound to offer you the right solution. 


Heater – thermostat – circuit breaker – normally closed – red

It couldn’t be put more simply than that! It might look like a Japanese poem, but it's actually a guideline to achieving the best heating in your control cabinet. 

The switch command for activating the enclosure heater is issued by an enclosure thermostat, such as the tried-and-tested KTO 111. This is a mechanical bimetal thermostat which, as a two-point regulator, has adjustable upper and lower threshold values for temperature. 


That covers the first two points. You’ve made the right choice of thermostat with the KTO 111. More specifically, we’ve designed it to break the contact in the event of rising temperatures. This means that when the upper temperature threshold is exceeded, we don’t want it to heat the control cabinet, or else it will get too warm. This type of switch is commonly referred to as NC (normally closed). Now to add a splash of colour. The settings dial of the KTO 111 thermostat is red and gives us a catchy mnemonic for heating. 


It’s Too warm

Filter fan – thermostat – contact maker – normally open – blue

To avoid the control cabinet application dropping dead with heat stroke, we also need to regulate the filter fans. In this case, it's the other way around and we use the KTS 111 thermostat. As NO (normally open) contact makers, the contact switches in the event of rising temperatures and the filter fan whirrs into action. The settings dial for temperature on the KTS 111 is blue, reminding us that we’re trying to cool down. 


The cooling or heating capacity required can be calculated using our calculation tool.


STEGO KTO 111 zu KTS111, connection example.



The climate in a control cabinet needs to be just right so that the electronics can work seamlessly over long periods. Using the enclosure thermostats which, depending on the version, regulate the way heating and cooling are switched on or off, you can strike the perfect balance. In other words, you can guarantee the optimal temperature range inside your control cabinet.




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