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Enclosure Thermal Management

The internal temperature of an electrical enclosure must be closely monitored and controlled in order to protect sensitive equipment housed inside. The changing temperature outside of an enclosure can require heating or cooling applications for the inside of an enclosure to prevent components from freezing or overheating and to prevent condensation from forming. 

Enclosure air conditioners use chemical refrigerants, compressors, evaporators, condensers and fans to cool the inside of an enclosure. They create a closed loop system for cooling, which circulates the air inside the enclosure without mixing with outside air. Thermoelectric coolers have a cold side that is placed inside the enclosure and a hot side placed outside the enclosure with fans that circulate the cool air throughout the enclosure.

Enclosure fans draw filtered, ambient air into the enclosure at the same time as internal, heated air is blown out as exhaust. An exhaust filter can be used with a filter fan to aid in pressurization of the enclosure, reducing the chance of unfiltered air entering back into the enclosure. A filter fan should be located in the bottom third of the enclosure and the filtered exhaust grill placed as high as possible on the opposite side of the fan.

Enclosure heaters are necessary when an outdoor enclosure is located where temperatures dip well below freezing and heating is required to keep the internal temperature of the enclosure within an optimal operating range for the electrical components. Heaters also help to reduce condensation, with relative humidity inside the enclosure ideally kept below 65 percent. A heater should be placed near the bottom of the enclosure to allow natural convection of heat distribution, but some larger enclosures could require a fan to distribute heat. 

Products

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$118.98
Rittal 7030128 CMC III Sensors
$118.98
Rittal 3188945 Wall-mounted cooling unit Blue e+ chemical 1.6 - 5.8 kW
$118.98
Rittal 4531001 With one-sided mounting on the 482.6 mm (19") adapter profiles.
$118.98
Rittal 7280100 Service outlet for enclosure frame attachment/16 A, integration of a service outlet within a separate supply circuit, independently of the IT network and UPS.
$118.98
Rittal 3450500 For connecting round conductors and laminated copper bars.
$118.98
Rittal 4050030 Assembly aid for tools, for changing and calibrating tools such as drills, milling cutters or screw taps. Suitable for SK30 tool holders.
$118.98
Rittal 3214115 Output classes 375 – 5,000 W. For use in tough environments. Convenient mounting options and flexible water connection options. Partial or full internal mounting possible.
$118.98
Rittal 4309000 For simple attachment of cable ducts, cable conduit holders, contact hazard protection cover plates, equipment installed on the door, cable clamping and attachment.
$686.40
Hoffman CVR1604R5 Feature: Ventilation roof plate with integrated filter for mild steel floor standing enclosuresAdvantage: Allows for natural ventilation through the raised roof and keeps insects and dust outsideBenefit: Cost effective thermal management based on natural ventilationComment: The enclosure protection is reduced to IP31; the ventilated roof plate is available with forced ventilation by adding the Fan Roof Plate, CFRS
$854.10
Hoffman CVR1208R5 Feature: Ventilation roof plate with integrated filter for mild steel floor standing enclosuresAdvantage: Allows for natural ventilation through the raised roof and keeps insects and dust outsideBenefit: Cost effective thermal management based on natural ventilationComment: The enclosure protection is reduced to IP31; the ventilated roof plate is available with forced ventilation by adding the Fan Roof Plate, CFRS
$572.00
Hoffman CVR1204R5 Feature: Ventilation roof plate with integrated filter for mild steel floor standing enclosuresAdvantage: Allows for natural ventilation through the raised roof and keeps insects and dust outsideBenefit: Cost effective thermal management based on natural ventilationComment: The enclosure protection is reduced to IP31; the ventilated roof plate is available with forced ventilation by adding the Fan Roof Plate, CFRS