Cooling Electrical Panels In Waste Water Treatment ApplicationsSource: Noren Products, Inc.
Over the past few decades, the use of sophisticated electronics for automation and process controls as well as transformers, VFDs and PLCs have become commonplace in NEMA enclosures. The thermal management and related costs of these electronic enclosures has become very important considerations in managing these valuable assets.
NEMA cabinets are used for protection from the harsh environments encountered in many industries, both indoors and out. Without some form of cooling, problems will occur with heat sensitive electronics in these enclosures. Most electronics can handle temperatures between 40c and 50c, some more, some less. It is always a good idea to check the manufacturer’s specifications regarding the maximum allowable operating temperature of the devices being used; this is key in making the correct thermal decision for your applications.
Also, for outdoor installations, factor in the correct solar heat load, an often overlooked source of heat related failures. As always, the best solution is prevention via some sort of overhang or cover but if this is not possible, an accurate solar load calculation is a must.
Image credit: "Makah electrical rehabilitation (Recovery Act)," © 2010 USFWS Pacific, used under an Attribution 2.0 Generic license: http://creativecommons.org/licenses/by/2.0/