A common practice is that effective enclosure to retain cooling is mostly overlooked. This is the reason many panels feature natural ventilation and owing to scarce consideration given to the enclosure heat load and ambient temperature effects, it results in the cabinets internal temperature inability to hold at required safe level. The consequence is the equipment becomes too hot in hot weather leading to risk of equipment life shortening or failure. This risk can be minimized by monitoring the control panel temperature and to ensure installation of industrial cooling systems, wherever necessary.
How Industrial Control Panels become hot?
Industrial control panels’ temperature is related directly to the heat rate generated within the panel. The control systems generate more heat owing to the increased use of microprocessor controlled and electronic controlled gears. In fact, it worsens such that with the electronic drives increased use, it generates waste heat to substantial amounts.
Inadequate Cooling Consequences
The electrical control equipments ability to successfully operate at high temperature differs. The manufacturers concentrate on the equipment operation rate at high temperatures, but fail to understand that the life of the equipment suffers invariably. Adding to this, sensitive equipments such as precision measuring devices, power supplies and controllers also suffer. In fact, even the microprocessor controlled devices such as PLCs malfunction when there are high temperatures and begin to operate normally when the temperatures fall.
Industrial cooling is a methodical approach to enclosure cooling of any industrial control panel. This assures internal temperature as predictable of an enclosure and you can also avoid heat related incidents.
It is essential to assess or determine the temperature that is tolerable to maximum within the enclosure. This is required so that the chosen temperature should ensure trouble free operation. It should also not go more than 35°C.
Assessing the heat amount generated within the enclosure is essential. Information on relevant heat dissipation is available from the manufacturers of the equipment. However, by adding the individual losses, assessing or calculating in watts the total heat load is possible. Conversely, if the enclosure is subjected to heat external sources such as the sun, then you cannot miss taking into account even the radiant contribution.
Accurately assessing ambient range of temperature helps in determining the industrial cooling type of solution required. Of course, mistakes can happen with temperature calculation in case the control panel is positioned higher than the ambient temperatures outside. This happens due to the solar radiation received by the building and also due to the buildings heat generating equipment.
There are cooling alternatives and the very simple option is using ventilation fans that eliminate the heat from within the enclosure. Of course this is a viable option if the ambient temperature is lower than the temperature in the enclosure. Fans remove heat only and cannot cool actively and so if you use fans, they should be fitted in association with filters. It is also necessary to prevent the doorway of the enclosure by sealing so that dirt, water, dust or corrosive chemicals are prevented.