Wherever a lot of technology is in operation, heat is generated, and in most cases even heat. This is partly due to the law of conservation of energy in physics and the metals used in the electronic parts. In a switch cabinet, energy flows without end – after all, this is where the most complex processes are coordinated and controlled. Unfortunately, however, the energy used is not 100% and exclusively for the intended purpose – a small part of the energy evaporates from the process in the form of heat energy. This circumstance is almost unavoidable.
Metal not only conducts electricity well, but also heat. These two facts in combination naturally favour a rise in temperature in the switch cabinet. In addition, the door should always be kept closed, because external influences on the extensive systems should be avoided if possible. After all, everything in a control cabinet has its strict order and a fixed concept. Even dirt or small flying insects are undesirable in control cabinets. When the door is closed, i.e. no draught, the natural air cooling that works in everyday life with smaller electrical appliances is therefore not required. The solution is an effective and well thought-out cooling system. If this is not available or poorly installed, there is a danger that is always underestimated: condensation water.