Exair's HazLoc Cabinet Coolers Receive UL Approval
System may be suitable for electrical enclosures with problematic overheating.
Exair’s Hazardous Location Cabinet Cooler Systems received the Underwriters Laboratory (UL) classified designation for Division 1 environments. They were tested by UL and passed requirements for use upon classified purged and pressurized electrical enclosures within Class I, Division 1—Groups A, B, C and D; Class II Division 1—Groups E, F and G; and Class III environments.
The coolers circulate 20°F (-7°C) air inside enclosures to prevent high-temperature faults. They mount in a standard electrical knockout, while keeping the NEMA 4 or 4X rating of the enclosure. The systems also include an auto drain filter separator to ensure no moisture passes to the inside of the electrical enclosure. An optional thermostat control minimizes compressed air use and keeps the enclosure at ± 2ºF of the setting.
Applications include cooling control panels, PLCs, microprocessors, fractional Hp variable frequency drives and robotics.
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The main task of this work was to study the influence of the different parameters on the electrolytic coloring process for aluminum.
This paper is a peer-reviewed and edited version of a presentation delivered at NASF SUR/FIN 2012 in Las Vegas, Nev., on June 12, 2012.