The Importance Of Having Explosion Proof Motors In Some Locations For a location where flammable gases and vapors are a continuous threat, choosing the proper explosion proof motor is very important. The motor absolutely has to be protected against harmful ignitions in these situations. Comprehension of this importance increases the difficulty of choosing the right motor. In order to be a suitable choice, the motor has to be approved for its designated Class locations. As it has been in operation in a harmful location, sometimes workers just believe the motor is explosion proof. Nevertheless, just because the motor has been used around explosive gasses or ignitable dust, this does not mean that the motor is qualified as a Class I. For more information about hazardous regions, consult Chapter 5 from the National Electrical Code. Class I The Class I motor works by containing the explosion inside the casing and without rupturing. At the beginning you will have a buildup of pressure at the point of ignition. Then, the heated gas will move through flame paths, which are long passageways. The gas is given time to cool as it proceeds toward the motor casing escape routes. When the gases finally escape the motor, the temperature should be under the Minimum Ignition Temperature (MIT) of the remaining gases in the region surrounding the motor. The Class I settings are based on how flammable gases, liquids or vapors are generally which would be liable to explode. It qualifies as a Class I substance whenever they represent a threat of exploding. For example, gasoline is both explosive in its vapor form plus ignitable in its liquid form. In locations where the fumes and liquid form of gasoline are a constant presence, the Class I explosion proof motor is a necessity. Class II Class II substances at the same time are specifically dust forms. Specific dusts may earn a Class II rating because they are able to conduct electricity. Places where dust accumulates in sufficient amounts that explosive mixtures occur can also be specified as Class II. As grain builds up in grain silos, hazardous dust presents a risk of explosion. Inside coal mines, coal dust can be a hazard. If you have a large enough quantity of combustible particles, the situation qualifies as a Class II because they can become flammable presenting a major risk. Check the Label When selecting motors for hazardous locations, it is important to choose the motor that best fits the situation. For use in grain elevators and coal mines, for example a Class I motor would not be appropriate due to the high level of risk where the dust particles could explode. The Class I motor was made specifically to constrict the effects of an internal motor explosion. You'll have to carefully consider the risks that are most present when determining which explosion proof motor
MDA Controls Inc.
The Importance Of Having Explosion Proof Motors In Some Locations would be more appropriate. In an effort to determine whether the motors being considered are suitable for operation in Class I or Class II locations, look for this designation on the Underwriters' Laboratories label. Occasionally motors are appropriate for both types of settings and will carry approval for both Classes. Seek Verification It is helpful to consult with a field service representative of the insurance underwriter if there are any questions or concerns. Another option is to discuss your situation with the manufacturer or dealer of the motors. They fully grasp the particulars involved with the divisions and various classes indicating where the motor is acceptable for use. If there is any kind of confusion, the professionals can provide the much wanted clarifications and help you get the proper explosion proof motor. The end result is that the chosen motor should have the appropriate classification in order for it to present the highest level of safety. A closed, externally ventilated explosion proof electric motor from MDA Controls is definitely a great choice for your project. For additional information on MDA Controls, have a look at their web page at http://www.mdacontrols.com/.
Document Tags: explosion proof electric motor, explosion proof motor starter, explosion proof motor http://www.mdacontrols.com/
MDA Controls Inc.
Published on May 19, 2014
Published on May 19, 2014
A closed, externally ventilated explosion proof electric motor from MDA Controls is definitely a great choice for your project. For addition...