Air conditioner switch cabinet

Is it very warm in your control cabinet? Are you concerned that the high temperatures could damage your technology? Read here what options you have for cooling your control cabinet and which criteria you use to select an air conditioning unit for the control cabinet.

If many devices are installed in a control cabinet, they usually also generate heat. This leads to increased temperatures, which could damage the components. In the private sphere, this does not happen very often. Within commercial and industrial control cabinets, however, the number of devices is usually significantly higher and air conditioning is necessary. Control cabinet air conditioning systems are therefore mainly used for cooling communication devices, transformers and switchboards.

Source: eibabo®, Rittal SK 3361.500 wall-mounted cooling unitImage: Rittal SK 3361.500 wall-mounted cooling unit

Under what circumstances are air conditioning units used for the control cabinet?

When the air temperature outside the cabinet is too high or the air quality is poor, simply using ventilation to dissipate the heat may no longer be sufficient. Control cabinet air conditioning systems are designed in such a way that they dissipate excess heat from control cabinets and device housings to the atmosphere. This serves to protect the heat-sensitive components from overheating, because the service life of electronic components is reduced at higher operating temperatures. The air conditioning of control cabinets extends the service life of electrical components and ensures increased fault tolerance of the devices. Use a control cabinet air conditioning system if:

  • the temperature inside the housing must be equal to or lower than the ambient temperature
  • the required heat dissipation cannot be provided by the environment
  • the ambient air is very polluted
  • the ambient air contains too much humidity

 

The typical areas of application are server farms, telecommunications systems, automation systems and control cabinets, transformer stations and substations, radio stations, data storage stations and energy storage systems.

How does a control cabinet air conditioning system work?

The design of industrial air conditioning systems provides for two completely separate air circuits, which prevent the air in the cabinet from mixing with the ambient air. This means that the cooling system maintains a suitable temperature inside the case without the ingress of dirt, dust, moisture, water or corrosive fumes.

 


TIP:

Make sure that the housing or the control cabinet is also sealed airtight. If necessary, add the necessary seals to the door or close ventilation outlets.


 

Most of the air conditioning units for control cabinets available from eibabo® work according to the principle of the air-air heat exchanger. These typically use copper tubing with small fins to ensure optimal heat exchange between the two air circuits. The copper tubes are filled with coolant, which easily changes its state of aggregation between liquid and gaseous. In order to cool the switch cabinet, the warm air from the switch cabinet is routed through the ribs of the pipe system. The copper tubes and fins absorb the heat, heating the liquid in the copper tubes while cooling the air. A heat exchange takes place. The heated liquid in the copper tubes turns into a gas and moves to the other side of the unit to the external air circuit. This causes the cooling of the copper pipes and the coolant according to the opposite principle. The heat absorbed in this way is released into the atmosphere. The coolant becomes liquid again and flows back to again absorb heat in the control cabinet. A cycle is created. Unlike other cabinet cooling systems, air-to-air heat exchangers have no moving parts. There are low maintenance costs, the devices work efficiently and economically.

Far less common are the thermoelectric cabinet coolers. These work according to the Peltier effect and are therefore also called Peltier coolers. These represent special types of cooling systems, which are used particularly in harsh and dangerous environments.

Jean Peltier

In 1834, the French physicist discovered that the flow of current at the junctions between two dissimilar electrical conductors causes a temperature difference.


The functional principle of thermoelectric cabinet coolers is based on the fact that heat is either absorbed or given off when a voltage is applied to the connection point between two materials. Semiconductors are typically used here, the different number of free electrons of which ensure the required energy difference. When current flows, heat is transferred from one terminal to the other and a cooling effect occurs.

What does master/slave function mean?

An appropriate temperature in the control cabinet ensures the function of the devices installed in it. It is therefore often necessary to avoid an increase in temperature even if a device fails or the performance of a device is no longer sufficient. Although the performance of one device is typically sufficient, a second air conditioning device serves to secure the first system and is connected to it. Both devices exchange data, measured values and error messages. Master and slave work to support each other, alternately or as a substitute. The master device thus takes care of the primary cooling, while the slave remains in stand-by mode and switches on automatically when required.

How and where can the air conditioning for control cabinets be installed?

Systems are offered for a wide variety of purposes. You get devices for outdoor use, devices protected against vandalism and devices for indoor installation. It is mounted on the roof or on the side walls of the cabinet. With roof-mounted air conditioners, the heated air escapes to the rear, left, right or even upwards. This means that it can be used in a row or set up close to the wall without any problems. In the case of air conditioners for wall mounting, installation, partial installation and attachment are possible, depending on the space required.

What should I look out for when buying a switch cabinet air conditioning unit?

If the ambient temperature is higher than the required temperature in the cabinet, you should consider using a cabinet air conditioner. The following points, among others, should be considered when making the selection:

  • Type of installation of the control cabinet according to VDE 0660 Part 500
  • Ambient conditions (temperature, dirt and humidity)
  • maximum desired control cabinet interior temperature
  • Power loss of the electronic components in the control cabinet
  • IP degrees of protection

 

If you install an air conditioner for the control cabinet, please pay attention to the following things:

  • The control cabinet must be sealed.
  • When mounting on the cabinet roof, this should be reinforced if necessary.
  • The condensate drain must be introduced into the outlet opening so that no condensate flows into the cabinet. Some models do not have a drain. Instead, the condensate evaporates.
  • A door switch should be installed to turn off the air conditioner while the door is open.
  • Keep the air circulation in the cabinet clear and avoid obstacles at the air inlet and air outlet.

 

At eibabo® you only get high-quality, reliable and powerful air conditioning units from well-known manufacturers such as Kraemer & Kraus, Rittal, Schneider Electric and Siemens.

 

eibabo - technology store

 

Catalogue content:


In this eibabo® catalogue Cabinet enclosures > Air conditioner (switchgear cabinet) you will find items from the following product groups:

Item overview:

  • Air conditioner
  • Air conditioning
  • Climate control
  • Control cabinet air conditioning
  • Heat exchanger
  • Integration
  • Refrigerant lines
  • Roof structure
  • Split cooling
  • Temperature


from the following manufacturers:

Manufacturer overview catalogue Air conditioner switch cabinet:

  • Rittal
  • Schneider Electric


 
Is it very warm in your control cabinet? Are you concerned that the high temperatures could damage your technology? Read here what options you have for cooling your control cabinet and which... read more »
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Air conditioning unit control cabinet – For optimal operating temperatures

Is it very warm in your control cabinet? Are you concerned that the high temperatures could damage your technology? Read here what options you have for cooling your control cabinet and which criteria you use to select an air conditioning unit for the control cabinet.

If many devices are installed in a control cabinet, they usually also generate heat. This leads to increased temperatures, which could damage the components. In the private sphere, this does not happen very often. Within commercial and industrial control cabinets, however, the number of devices is usually significantly higher and air conditioning is necessary. Control cabinet air conditioning systems are therefore mainly used for cooling communication devices, transformers and switchboards.

Source: eibabo®, Rittal SK 3361.500 wall-mounted cooling unitImage: Rittal SK 3361.500 wall-mounted cooling unit

Under what circumstances are air conditioning units used for the control cabinet?

When the air temperature outside the cabinet is too high or the air quality is poor, simply using ventilation to dissipate the heat may no longer be sufficient. Control cabinet air conditioning systems are designed in such a way that they dissipate excess heat from control cabinets and device housings to the atmosphere. This serves to protect the heat-sensitive components from overheating, because the service life of electronic components is reduced at higher operating temperatures. The air conditioning of control cabinets extends the service life of electrical components and ensures increased fault tolerance of the devices. Use a control cabinet air conditioning system if:

  • the temperature inside the housing must be equal to or lower than the ambient temperature
  • the required heat dissipation cannot be provided by the environment
  • the ambient air is very polluted
  • the ambient air contains too much humidity

 

The typical areas of application are server farms, telecommunications systems, automation systems and control cabinets, transformer stations and substations, radio stations, data storage stations and energy storage systems.

How does a control cabinet air conditioning system work?

The design of industrial air conditioning systems provides for two completely separate air circuits, which prevent the air in the cabinet from mixing with the ambient air. This means that the cooling system maintains a suitable temperature inside the case without the ingress of dirt, dust, moisture, water or corrosive fumes.

 


TIP:

Make sure that the housing or the control cabinet is also sealed airtight. If necessary, add the necessary seals to the door or close ventilation outlets.


 

Most of the air conditioning units for control cabinets available from eibabo® work according to the principle of the air-air heat exchanger. These typically use copper tubing with small fins to ensure optimal heat exchange between the two air circuits. The copper tubes are filled with coolant, which easily changes its state of aggregation between liquid and gaseous. In order to cool the switch cabinet, the warm air from the switch cabinet is routed through the ribs of the pipe system. The copper tubes and fins absorb the heat, heating the liquid in the copper tubes while cooling the air. A heat exchange takes place. The heated liquid in the copper tubes turns into a gas and moves to the other side of the unit to the external air circuit. This causes the cooling of the copper pipes and the coolant according to the opposite principle. The heat absorbed in this way is released into the atmosphere. The coolant becomes liquid again and flows back to again absorb heat in the control cabinet. A cycle is created. Unlike other cabinet cooling systems, air-to-air heat exchangers have no moving parts. There are low maintenance costs, the devices work efficiently and economically.

Far less common are the thermoelectric cabinet coolers. These work according to the Peltier effect and are therefore also called Peltier coolers. These represent special types of cooling systems, which are used particularly in harsh and dangerous environments.

Jean Peltier

In 1834, the French physicist discovered that the flow of current at the junctions between two dissimilar electrical conductors causes a temperature difference.


The functional principle of thermoelectric cabinet coolers is based on the fact that heat is either absorbed or given off when a voltage is applied to the connection point between two materials. Semiconductors are typically used here, the different number of free electrons of which ensure the required energy difference. When current flows, heat is transferred from one terminal to the other and a cooling effect occurs.

What does master/slave function mean?

An appropriate temperature in the control cabinet ensures the function of the devices installed in it. It is therefore often necessary to avoid an increase in temperature even if a device fails or the performance of a device is no longer sufficient. Although the performance of one device is typically sufficient, a second air conditioning device serves to secure the first system and is connected to it. Both devices exchange data, measured values and error messages. Master and slave work to support each other, alternately or as a substitute. The master device thus takes care of the primary cooling, while the slave remains in stand-by mode and switches on automatically when required.

How and where can the air conditioning for control cabinets be installed?

Systems are offered for a wide variety of purposes. You get devices for outdoor use, devices protected against vandalism and devices for indoor installation. It is mounted on the roof or on the side walls of the cabinet. With roof-mounted air conditioners, the heated air escapes to the rear, left, right or even upwards. This means that it can be used in a row or set up close to the wall without any problems. In the case of air conditioners for wall mounting, installation, partial installation and attachment are possible, depending on the space required.

What should I look out for when buying a switch cabinet air conditioning unit?

If the ambient temperature is higher than the required temperature in the cabinet, you should consider using a cabinet air conditioner. The following points, among others, should be considered when making the selection:

  • Type of installation of the control cabinet according to VDE 0660 Part 500
  • Ambient conditions (temperature, dirt and humidity)
  • maximum desired control cabinet interior temperature
  • Power loss of the electronic components in the control cabinet
  • IP degrees of protection

 

If you install an air conditioner for the control cabinet, please pay attention to the following things:

  • The control cabinet must be sealed.
  • When mounting on the cabinet roof, this should be reinforced if necessary.
  • The condensate drain must be introduced into the outlet opening so that no condensate flows into the cabinet. Some models do not have a drain. Instead, the condensate evaporates.
  • A door switch should be installed to turn off the air conditioner while the door is open.
  • Keep the air circulation in the cabinet clear and avoid obstacles at the air inlet and air outlet.

 

At eibabo® you only get high-quality, reliable and powerful air conditioning units from well-known manufacturers such as Kraemer & Kraus, Rittal, Schneider Electric and Siemens.

 

eibabo - technology store

 

Catalogue content:


In this eibabo® catalogue Cabinet enclosures > Air conditioner (switchgear cabinet) you will find items from the following product groups:

Item overview:

  • Air conditioner
  • Air conditioning
  • Climate control
  • Control cabinet air conditioning
  • Heat exchanger
  • Integration
  • Refrigerant lines
  • Roof structure
  • Split cooling
  • Temperature


from the following manufacturers:

Manufacturer overview catalogue Air conditioner switch cabinet:

  • Rittal
  • Schneider Electric
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Rittal - SK 3304.500 - Wall-mounted cooling unit comfort, 230V, 1000W SK 3304.500
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