Temperature control is a crucial element in the design of enclosures for electrical equipment. Since manufacturers design electrical equipment to work within a specific temperature range, the heat they dissipate during normal operation has to be removed to avoid damaging equipment. High temperature directly affects the reliability and life of electrical equipment. Manufacturers claim that a 10 °C increase of temperature above the maximum allowable temperature cuts device lifespan in half. The consequences are increased downtime, frequent maintenance cycles and a high expenditure. These are some commonly used temperature control solutions employed in the industry: Continue reading →
“Ambient temperature” is a term you will hear often when researching electrical enclosure cooling systems. But what exactly does it mean? In simple terms, it’s the temperature of the air surrounding an electrical enclosure. As a concept it’s relatively simple, but determining the ambient temperature is not always as easy as it first appears.
The selection of the right size enclosure air conditioner should be based on a careful assessment of the total heat load, ambient temperature variation, and the required enclosure temperature. If the air conditioner is larger than required, energy usage will increase and the unit will cycle excessively. Conversely, an air conditioner that’s too small will run continuously and not control the temperature properly. A number of factors need to be considered when choosing an air conditioner. Here is how to select an enclosure air conditioner with the right cooling capacity:
The temperature of equipment in electrical enclosures must be controlled to avoid the risk of equipment failure due to overheating. In most cases, some form of enclosure temperature control is needed.
These seven tips can help you assess your temperature control systems. Although enclosures dissipate heat, the total heat load in many instances exceeds the rate at which this heat can be dissipated, and the internal enclosure temperature may exceed the maximum temperature limits of the equipment. Continue reading →
Electrical equipment manufacturers generally recommend enclosure temperatures be kept below 95ºF (35ºC). Active cooling maintains the electrical components at constant operating temperature, providing a longer and more reliable life span. A crucial first step in determining whether a temperature controlled electrical enclosure is necessary for your industrial application is calculating the heat load.
Besides thermal, other environmental requirements such as moisture and dust must also be considered.
The cost of installing a reliable enclosure cooling system can be far less than the cost of future equipment failure. For this reason it’s best to plan electrical enclosure temperature control during the initial design phase and prior to installation. Continue reading →
When installing a variable frequency drive (VFD) into an electrical enclosure, careful consideration needs to be given to the much higher heat losses of VFDs compared to other items of electrical equipment. This will have a direct impact on the total heat load of the electrical enclosure and the capacity and method of cooling to be adopted. Other factors to consider are the position of the VFD inside the enclosure as well as an assessment of the maximum allowed operating temperature of the VFD.
When selecting a temperature control solution for electrical enclosures in applications such as telecommunications, water treatment plants, manufacturing plants, or industrial complexes, several factors must be considered. These factors will determine whether a filtered fan system or closed loop enclosure air conditioner is the best choice for protecting the electrical equipment from damage.
Outdoor telecom electrical enclosures are subject to high levels of solar radiation. The effects of solar heating as well as the heat load inside enclosures mean that some form of enclosure cooling is necessary. Additionally, telecom electrical enclosures and their associated enclosure coolers must be able to withstand the effects of adverse weather conditions.
Water treatment plants represent an unusual combination of predictable and somewhat unpredictable conditions that result in a hostile environment for electrical equipment. Although there are similarities between potable and wastewater treatment, the added hazards of human and industrial waste mean that environmental conditions at wastewater treatment plants are more difficult.