NEMA Ratings and Enclosure Locations

Any realtor will tell you that the three most important factors in selecting a property are location, location, and location. This simply means that houses with similar features – number of bedrooms, yard size, structure, garage (or not,) basement or not,) etc. – can be found in a lot of very different neighborhoods. Whether you want to live somewhere that’s convenient to the highway, close to (or not so close to) work, near your favorite activities, etc., odds are you can find a house that meets your material needs & wants within those geographical confines. Hence, location is your #1 consideration. And your #2 and your #3 as well…my lovely bride is a real estate professional, so I have this on good authority. And, so you know, #4 is price, and #5 is condition.

Electrical and electronics controls professionals will tell you that three of the most important things to protect their equipment from are heat, moisture, and dust. If you’re looking for a durable, reliable, and low cost method for that, we’ve got the solution: the EXAIR Cabinet Cooler System. Selection of the right system comes down to determining your heat load, and…the reason for today’s blog…the LOCATION in which it will be installed.

Let’s say it’s a control panel for one of the machines on a factory production line…indoors & dry.  Our NEMA 12 Cabinet Cooler Systems provide protection against dust and oil from entering the enclosure.

NEMA 12 Cabinet Cooler Systems are oil tight, dust tight, and rated for indoor duty. They can also be installed to the wall of an enclosure (instead of the top) with a Side Mount Kit.

If the enclosure is outdoors, or indoors but subject to water spray (like in a wash-down area,) our NEMA 4 Cabinet Cooler Systems are oil tight, dust tight, AND splash resistant.  They ensure the inside of the enclosure stays dry through the use of a low pressure relief valve that seals when the cooler is not operating, maintaining NEMA 4 integrity at all times.

EXAIR NEMA Cabinet Cooler Systems provide additional protection to keep the enclosure dry inside.

Our NEMA 4X Cabinet Cooler Systems are made of stainless steel, and are commonly specified for food service area installations, and in corrosive environments.  They’re also oil tight, dust tight, and splash resistant.  These are also available in Type 316 Stainless Steel construction, for especially harsh conditions, or when this is otherwise specified due to the nature of the installation, such as critical food grade or pharmaceutical areas.

EXAIR NEMA 4X Cabinet Cooler Systems are made of corrosion resistant stainless steel for corrosive environments, and are also available with Side Mount Kits.

Regardless of the NEMA rating called for by the location, all EXAIR Cabinet Cooler Systems are available with a Non-Hazardous Purge option, which provides a slight positive pressure through a low (1 SCFM) air flow when internal temperature is below the thermostat setpoint and the solenoid valve is closed.  This provides constant and reliable protection, even if the enclosure is not perfectly sealed, even in especially dirty or dusty environments.

All EXAIR Cabinet Cooler Systems are available with Non Hazardous Purge for constant, reliable protection from environmental contaminants.

High Temperature Cabinet Cooler Systems are also available when ambient temperatures can exceed 125F.  These are popular in foundries, glass production facilities, and even non-air conditioned spaces in particularly warm climates.

High Temperature Cabinet Cooler Systems provide reliable heat protection in areas where ambient temperatures reach 125-200F (52-93C)

If you’ve got sensitive, mission-critical electrical or electronic enclosures that need reliable heat protection, EXAIR has the solution you’re looking for.  If you know the required cooling capacity for your enclosure, you can select the right system directly from our website.  If you’d like help in calculating your heat load, you can use our Cabinet Cooler System Sizing Guide…just fill in the blanks and click “submit” – your request will be forwarded to an Application Engineer for immediate attention.  Or, if you’d rather, just give me a call.  We calculate heat loads over the phone all the time; it only takes a minute.

FREE EXAIR Webinar – May 23, 2018 at 2:00 PM EDT

Warmer temperatures are quickly approaching, which may seem like a welcome change for personal reasons, but in a processing line, the increased temperatures can wreak havoc on sensitive components found in an electrical control panel.

EXAIR Corporation will be hosting a FREE webinar titled “Intelligent Solutions for Electrical Enclosure Cooling” on May 23, 2018 at 2:00 PM EDT.

(click on the photo to register – it’s FREE!)

By attending this interactive session, you will learn the difference between the 3 most common NEMA ratings for electrical control panels found in an industrial setting, NEMA Type 12, 4 and 4X. We’ll provide examples of traditional, yet unreliable, methods of cooling and the concerns associated with using these types of devices.

Next we will explain how ignoring heat related issues can cause machines to shut down due to failed electrical components, resulting in lost production and increased maintenance costs, negatively affecting a company’s bottom line.

In closing, we’ll show how using an engineered, compressed air operated solution can reduce  downtime by providing a low cost, maintenance-free way to cool and purge control panels with no moving parts.

CLICK HERE TO REGISTER

Justin Nicholl
Application Engineer
justinnicholl@exair.com
@EXAIR_JN

Elevated Temperatures Can Really Affect A/C Panel Coolers

A food and beverage company contacted EXAIR, as they were having some issues with their air conditioning panel coolers. The units were located near ovens and the ambient temperatures were elevated.  During the summer months, the additional rise in temperature caused the air conditioning systems to under-perform.  The electronics were overheating and shutting down, causing production stoppage.  They needed a better way to keep the internal circuits cool during the hotter months.

The cooling capacities of the air conditioning panel coolers were over-sized to compensate for the high ambient conditions.  With the finicky nature of Freon systems, 8,000 BTU/hr units were required.  With the additional heat from summer, they had to continuously monitor and maintain the condenser units to keep them from running too hot.  This caused unneeded strain to their maintenance department, as it took time away from their normal duties.  They decided to contact EXAIR to see if our Cabinet Coolers could help in this situation.

Under normal conditions, refrigeration systems still have to be maintained by replacing filters, cleaning condensers, and checking compressors to prevent any failure.   Under elevated ambient conditions, it is very difficult to keep the Freon cool enough to operate adequately and the refrigeration compressor from over-heating.  EXAIR Cabinet Coolers do not use Freon or compressors to cool.  They use the power of a Vortex Tube which only needs compressed air to generate cold air.  With no moving parts to wear or unsafe chemicals to leak, they can keep the electrical components cool inside a panel for a very long time.

For sizing the EXAIR Cabinet Coolers, I needed some additional details.  I sent them the Cabinet Cooler Sizing Guide to help me determine the correct cooling capacity.  The information was as follows:

Height: 2200mm (87 inches)

Width: 800mm (31 inches)

Depth: 800mm (31 inches)

Internal heat load: 100 watts

Maximum Ambient: 70 deg. C (158 deg. F)

Required Internal Temp: 35 deg. C (95 deg. F)

NEMA Rating: NEMA 4X

Solenoid Voltage: 24Vdc

As an added note: they requested 316SS for anti-corrosion to be used for the Food and Beverage industry.

From my calculations, the ambient temperature was generating roughly 2,100 BTU/hr of heat on the external surface of the electrical cabinet.  The internal heat load was 100 watts or 341 BTU/hr.  Combining the values, the total heat load was 2,441 BTU/hr.  For the air conditioning units, they had to over-size the units to 8.000 BTU/hr of cooling capacity to remove 2,441 BTU/hr of heat.  This large difference is because of the high ambient conditions.  The EXAIR Cabinet Coolers do not have Freon to keep cool; so, the need to over-size is not necessary.  For the above electrical panels, I recommended a model HT4840SS-316-24VDC Cabinet Cooler System.  The cooling capacity is 2.800 BTU/hr, and it will keep the electrical components cool to 35 deg. C (95 deg. F) even during the hotter months of summer.

EXAIR NEMA Type 4/4X Cabinet Cooler System

With the EXAIR Cabinet Cooler Systems, we can offer a variety of different options to accommodate different applications.  For the food and beverage company above, the HT4840SS-316-24VDC was needed to meet the NEMA 4X rating of the panel and the 316SS construction for washdowns and corrosion resistance.  The “HT” at the beginning of the model number is for the High Temperature option.  This allows the Cabinet Cooler to operate in high ambient conditions between 52 deg. C to 93 deg. C (125 deg. F to 200 deg. F respectively).  The system comes with a filter, cold air distribution kit, a thermostat and a solenoid valve.  The thermostat is preset at 35 deg. C (95 deg. F) and operates the a 24Vdc solenoid valve to reduce compressed air consumption.  EXAIR stocks many different sizes and options to help reduce any downtime.  So, when an A/C system quits or an electrical panel faults out due to overheating, EXAIR can ship one out quickly to get the system up and running again.

If you have electrical panels over-heating or air conditioning units under-performing, you should try an EXAIR Cabinet Cooler.  You can fill out the Cabinet Cooler Sizing Guide and an Application Engineer can determine the best model to keep your operations running; even during the summer months.

 

John Ball
Application Engineer
Email: johnball@exair.com
Twitter: @EXAIR_jb

 

Photo of Sun by Alexas_FotosCCO Creative Commons

IP Codes for Electrical Enclosures – What do they Mean?

The IP Code, otherwise known as ‘Ingress Protection’, ratings are defined in the international standard EN 60529 (or European IEC 60529.) Similar to NEMA ratings by the National Electrical Manufacturers Association, the IP ratings are used define the level of sealing effectiveness of enclosures against penetration from foreign matter and water/moisture.  The ratings for an enclosure are determined by actual testing.

The IP number is composed of the letters ‘IP’, two numbers and possibly one or two letters.  The first number refers to the protection level against solids, and the second number to the liquid protection level. The higher the  number, the greater the protection level. The optional letter codes relate to protection of persons against access to hazards within the cabinet, and any other special notice.

Below tables show the possible protection ratings and the description-

IP Table

Example – IP54 – IP – Code Letters, 1st Numeral is 5, 2nd Numeral is 4

An enclosure with an IP rating of this designation, IP54 –

  • 5 – Equipment within enclosure is protected from ingress dust of a limited quantity, such that no interference of performance is caused
  • 4 – Equipment within enclosure should have no harmful effects due to water splashed against the enclosure from any angle

Here at EXAIR we work with IP ratings everyday.  The Cabinet Cooler System line of products are made to keep electrical enclosures cool inside, while maintaining the integrity of the enclosure IP Code rating.

If you would like to talk about IP or NEMA ratings and the Cabinet Cooler Systems or any of the EXAIR Intelligent Compressed Air® Products, feel free to contact EXAIR and myself or one of our Application Engineers can help you determine the best solution.

Brian Bergmann
Application Engineer

Send me an email
Find us on the Web 
Like us on Facebook
Twitter: @EXAIR_BB

Video Blog: Connecting a Cabinet Cooler Thermostat and Solenoid to Power

With a Thermostat-Controlled Cabinet Cooler System, EXAIR uses a thermostat and solenoid valve to control the temperature inside an electrical panel.  They help to reduce the compressed air usage during cooler temperatures or off-peak hours.  Here is a video to demonstrate how to wire the thermostat and solenoid valve to a power source.

John Ball
Application Engineer

Email: johnball@exair.com
Twitter: @EXAIR_jb

 

EXAIR Cabinet Coolers – Built to Last!!!

I recently had the pleasure of working with a customer in UAE that manufactures tobacco products. They were duplicating an existing line due to an increase in demand and needed another Cabinet Cooler. The previous unit, HT4325-24VDC, had been installed approximately 20 years ago and was still functioning without any issues. This was long before he had started working with the company and they were unable to locate any order history with EXAIR to determine the appropriate model size to order.

cabinet cooler
HT4325 Cabinet Cooler – 20 years old!!!

They installed the cooler and auto-drain filter that comes with the kit. The only maintenance they’ve had to complete for the system is periodically changing the filter element. The Cabinet Cooler has no moving parts to wear out and requires little to no maintenance so long as it is supplied with clean, dry compressed air.

EXAIR’s UL Listed, CE Compliant Cabinet Coolers are available with Nema 12 (IP54) or Nema 4/4X (IP66) ratings. They’re capable of delivering 275 Btu/hr – 5,600 Btu/hr of cooling capacity and can be thermostatically controlled to reduce compressed air consumption. The rugged nature of EXAIR’s Cabinet Coolers makes them an ideal solution for dirty industrial environments. No longer will you experience shutdowns or downtime due to an overheated cabinet, maintenance required for A/C units, or contamination inside of your enclosure. By purging the cabinet with cool, clean air the EXAIR Cabinet Cooler keeps your cabinet cool while also preventing any dirt, dust, or debris from the ambient environment from wreaking havoc on your sensitive electronics.

The thermostatically controlled systems are pre-set to 95°F, but can easily be adjusted. Check out the video below for a brief instruction of how to adjust the thermostat if you require a different temperature inside the cabinet.

 

 

If you have control panels that are shutting down to excess heat, give us a call. With our Cabinet Cooler Sizing Guide, we’ll just need a few quick measurements and we can easily size the appropriate system for your needs.

Tyler Daniel
Application Engineer
E-mail: TylerDaniel@exair.com
Twitter: @EXAIR_TD

Coast to Coast and Beyond

Recently, I was working with  a customer looking for a Premium Reversible Drum Vac and wanted it shipped to the Northwest Territories of Canada –  which we could do!  It got me to thinking, what are the farthest US state and territory locations EXAIR has shipped to in the North, South, West and East directions.  I ‘scoured’ the records and came up with these.

Furthest North- We have shipped to Prudhoe Bay, Alaska.  Most recently, believe it or not, we shipped a NEMA 4X Cabinet Cooler to an Oil and Natural Gas Exploration Company.  Goes to show that even the coldest environments still have the need to provide cool, clean, dry air to cool and protect electronics in electrical enclosures.

Furthest South – We have shipped to the US Territory of Puerto Rico, city of Santa Isabel.  An Aerospace company needed a strong, laminar blast of air and utilized a 6″ Stainless Steel Air Knife.  An Air Knife offers a quiet, efficient way to clean, dry or cool parts, webs, or conveyors.

Furthest West- We have shipped to the US Territory of Guam.  The local University ordered a model 1111-4 Super Air Nozzle Cluster, for a good strong blast of air flow for a cleaning operation.  The model 1111-4 delivers 3.2 lbs of force, at just 82 dBA of sound. A safe and efficient nozzle for blowoff operations.

Furthest East- We have shipped to Eastport, Maine.  The customer in Eastport ordered a Line Vac and a section of Conveyance Hose.  The Line Vac is a great tool for conveying large volumes of material over long distances, through a standard hose or tube.  The compact design features large throat diameters for maximum throughput capability.

 

It was interesting to look back and see all the places that EXAIR has shipped.  We have customers from all over the globe. If you are outside the of 50 US States and Canada, we have a dedicated team of International Application Engineers that will work with you to select the best EXAIR product for your process and application, and direct you to your local International Distributor.

If you would like to talk about any of the EXAIR Intelligent Compressed Air® Products, feel free to contact EXAIR and myself or one of our Application Engineers can help you determine the best solution.

Brian Bergmann
Application Engineer

Send me an email
Find us on the Web 
Like us on Facebook
Twitter: @EXAIR_BB