Switchgear cabinets distribute electrical energy to the respective consumers
and process sensor data.
A control cabinet is a housing equipped with electrical or electronic components for the operation of a machine such as tooling machinery, for example, a production facility, or a plant. The components are not located directly in the machine but are outsourced.
The electronic components are protected by the housing against weather and environmental influences as well as mechanical effects and unwanted access.
The standard switchgear cabinet is a single-standing cabinet
with 1 or 2 doors. Bayed switchgear cabinets consist of several modular cabinet units. Wall-mounted enclosures, usually small cabinets, are attached to the back of a wall or a rack. In addition, there are also smaller designs such as terminal or switch boxes.
For indoor applications, the enclosures are often made of powder-coated sheet steel. In outdoor applications, control cabinets can also be made of galvanized or zinc-plated sheet steel. Depending on weather and environmental conditions, aluminum, stainless steel or plastic is often used, too.
As soon as the internal temperature of the switchgear cabinet reaches the maximum permissible temperature due to the heat loss of the installed components or according to the operating regulations, active cooling is necessary. Likewise, air conditioning is possible, which ensures a constant temperature, filters out dust and regulates humidity.
A busbar system ensures orderly and controlled power transmission and distribution. In addition, it contributes to operational safety by enabling an overall check and safety shutdown in the event of a fault.
The requirements for different protection classes are defined in DIN EN 60529 and ISO 20653. IP 54 means that protection against dust in damaging quantities, complete protection against contact and protection against splashing water from all angles is guaranteed.
Since many devices or control units are operated with 12 V or 24 V, switchgear cabinets are often equipped with corresponding switching power supplies, often also in top-hat rail design. However, other voltage ranges, e.g. 48 V, are also used.
A switchgear cabinet must be checked permanently. Basically, DIN EN 0100 and many other standards and regulations apply and must be complied with.