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Please support our sponsor Weidmüller Pty Ltd
| Weidmüller offers a wide range
of enclosures for the protection of circuitry, components and devices. These
products have been developed to suit a wide range of applications and
environments. For further details please click here.
For many years, the name Klippon® has stood for competence and quality in enclosures and for tailored application-specific solutions in harsh industrial environments. Weidmüller meets these demands with its new line of stainless steel enclosures: the Klippon® TB , Klippon® JB and Klippon® STB series, as well as with its new aluminium enclosures: the Klippon® K series. The portfolio is supplemented by the polyester enclosures of the Klippon® POK Series and polycarbonate enclosures. Regardless of the application being designed, Weidmüller offers many customized enclosure designs and individually tailored services. These include turnkey enclosure solutions with customer-specific configurations (such as mounting rails, drilled holes, cable glands, cutouts, special coatings, etc.). The full catalogue can be found here. |
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The following links are compliments of Weidmüller
Electrical Cabinet Construction - Lots of examples and technical information along with some innovative solutions are detailed.
Enclosures for the Protection of Circuitry, Components and Devices - These products have been developed to suit a wide range of applications and environments
Fieldbus Enclosures - Enclosures fully assembled and certified for use with Fieldbus Foundation or Profibus PA application requirements.
Hazardous Areas Technical Guide- This excellent 70 page technical guide. This is a large pdf download at 5 Megs, however it is worth the wait!
ATEX Information - ATEX 95, formerly known as ATEX 100a, is aimed at manufacturers. It applies to equipment and protective devices intended for use in potentially explosive atmospheres. Safety and controlling devices for use outside the hazardous area, but essential for the safe operating of equipment inside it are also covered.
Hazardous Areas Poster - A useful poster which details ATEX and Hazardous Area technical information.
Technical Dictionary - This excellent 44 page document
includes Certificates, Electrical data including clearance and creepage
distances, and Current load curve. It also covers;
General technical data - Including information about CE marking, EMV
directives, Protection types, Converting AWG conductors to mm2, Gauge pin,
Materials - Including Insulation materials, Metals, Current loading curves,
Connection types
ATEX
Terminals - Including Regulations / definitions, Assembling terminal strips,
Connecting terminals, Use of aluminium conductors, Definition of the various
types, Ex terminals.
Relay couplers/Opto-couplers
Overvoltage protection
Tools - Cutting, Stripping, Crimping
Know your Instrument and Electrical Enclosure - This document details some pertinent design requirements for Instrument and Electrical Enclosures.
Typical Instrument and Electrical Enclosure Specification Index - Although you will need to "fill in" all the technical details, this typical index does make sure that most requirements are covered.
Designing for EMC - The main EMC problems for electronic products are the emissions of internally-generated high frequencies which may interfere with on-board or nearby radio reception, and susceptibility to transient or radio frequency interference from the external environment which may degrade the quality of analogue signals, or corrupt digital processes. EMC standards specify levels and test methods for both of these groups of phenomena. A further requirement which comes under the umbrella of the EMC Directive is that the mains supply input current should be limited in its harmonic content. If they are dealt with as an integral part of the product design, these requirements are not hard to meet. Too often, because they do not affect the visible performance of the product, they are not considered until the design is substantially complete and production is about to start. Incorporating EMC principles as an afterthought is expensive and time-consuming. Only 15% of products which have not been designed for EMC are likely to pass EMC testing first time; on average between one and two re-designs (and re-tests) are necessary before such products are certifiable - from (www.elmac.co.uk).
Tips for Selecting Electronic Enclosures by David Angelo, Tracewell Systems - thanks to Evaluation Engineering
Keep Your RF at Home - Jud Strock - Your product design is underway, and you expect to have a prototype completed in two months. That will be soon enough to start thinking about EMC, and a good enclosure will solve all of your EMC problems. Right? Absolutely not. The enclosure is an integral part of your product, and the time to choose an enclosure is at the very beginning of the design cycle - thanks to Evaluation Engineering.
Typical Instrument Enclosure Specification - This document highlights the typical items that need to be considered when specifying an enclosure. From INTERTEC Instrumentation.
11.11
- Avoid
Thermal 'short cuts' to Improve Protection Efficiency - Specifying an
enclosure for field-based instrumentation is not a trivial task. If the
enclosure is destined for an extreme environment - such as desert or Arctic
regions - starting such a configuration process with one of the commonplace
styles of metal enclosures used for electrical panel gear is usually not such a
good solution, and can pose problems for the inexperienced - from Intertec
Global Enclosure Standards within the Electrical Industry - Industry standards for electrical enclosures exist to promote safety, encourage design efficiency and define minimum levels of product performance. In the European and North American electrical industries, several standards are enforced for these reasons. Across the global marketplace, these or other standards may be followed or there may be no standards at all, which can lead to wide variations in product performance and price. In many cases, the end customer is not aware of the standards or does not clearly understand them and, therefore, does not insist that suppliers provide products that meet the standards. Focusing solely on low price without fully understanding or requiring industry standards can yield a low initial product cost, but could ultimately lead to high maintenance expenses, component failure and in the worst case, worker safety issues. The purpose of this paper is to: (a) Clearly define the industry standards that exist for electrical enclosures (b) Compare the most commonly used standards so enclosure users can understand the key differences (c) Equip decision makers with the knowledge needed to select an electrical enclosure that has the appropriate rating and price to value relationship for its intended application - from Hoffman
NEMA Ratings For Electrical Enclosures - A large source of confusion when dealing with electrical enclosures is the NEMA rating, or how much protection the enclosure offers. The following article is a discussion on the definitions of various NEMA ratings, materials and finishes, and available options. From Cooper B-Line (www.b-line.com)
Standards for Enclosures- A useful technical note from Omega.com
11.11
Cooling
System Options for Electronic Enclosure Cooling: Do Thermoelectric Air
Conditioners Have the Advantage? - This white paper
discusses four popular options for cooling electronic/electrical equipment
housed in enclosures and cabinets. These options include thermoelectric air
conditioners, compressor-based air conditioners, vortex coolers and air-to-air
heat exchangers (heat pipes). Each cooling method is explained and the
advantages of thermoelectric air conditioners are examined as compared to the
other cooling methods - from EIC Solutions Inc.
It is essential that Instrument Enclosures and Sunshades are considered where Instruments are subjected to a wide range of environmental factors which might impair the efficiency and operation of process instrumentation, such as extremes of temperature, the ingress of dirt, dust and moisture, corrosion, accidental damage and tampering. Options can include electrical or steam heating, ventilation or integral insulation for protection from the world’s climactic extremes, such as Siberia, where the temperature can fall as low as -76°F (-60°C), or Australia / Middle East, where it can reach in excess of 104°F (+40°C).
Enclosure systems are typically used to protect process instrument manifolds and transmitters, solenoid valves, general field instrumentation and remote chemical sealed instruments.
These types of enclosures can be used with a specific range of enclosure manifold systems which enable ease of instrument installation and provides external process and vent connections.
Instrument Enclosures, Sunshades and Supports - Maintaining the integrity of process measurement instrumentation, protection from the effects of the industrial and the natural environment, both on and offshore, is vital, this technical bulletin from Anderson and Greenwood and our sponsors Prochem Pipeline Products gives a good technical overview of what is required. The bulletin covers Purpose and Applications, Features and Benefits, Technical Specifications Enclosures, EM Manifold Needle Valve, EM Manifolds, Electrical Heating, Electrical Heating, Enclosure Mounting and Instrument Shades
Modular Mounting System - The Modular Mounting System for instrument impulse line installations has been developed in conjunction with Shell International (SIPM) and has particular applications in the petrochemical and refining industries. You will have to scroll down this document to get to this article. From our sponsors Prochem Pipeline Products.
Enclosure Maintenance - David Crooks - Installed enclosures require periodic maintenance. The more hostile the environment, the greater the frequency of maintenance needed, and if done with vigilance, the greater the reward. Vibration, shock, or thermal expansion/contraction may loosen enclosure parts and fasteners. Constant flexing of conduit connections and stresses on liquid tight hubs may erode rubber fittings and seals. Routine inspections and periodic tightening of fasteners can prevent minor annoyances growing into major problems - from Fibox Enclosures (www.fiboxusa.com).