Explosion-safe lighting devices are Ex marking which means the ability to work in particularly difficult conditions in particular in areas with a high risk of explosion. Additionally, there is a high temperature strong dust presence in the atmosphere of gas and hazardous substances.
Such conditions and hence the necessity of application of explosion-proof lamps can take place at the following sites
For all these objects there is a risk of explosion, therefore, coverage should be arranged with the use of lighting devices representing a separate group of explosion proof led lamps.
Design explosion-proof led lamp
They have to meet the following requirements
These requirements ensure the safe operation of lighting in areas with increased risk.
Explosion-proof led luminaires are classified based on the purpose. There are two groups of lighting devices
Lamp category II use in mining
Additionally, the instrument found in different versions of a different type of protection. Each of the options involves the use of specific materials and technologies provide different levels of protection
There are also different classes of lighting. The difference between them lies in the level of temperature at which spontaneous ignition of the combustible mixtures at the site
Each class is characterized by mixtures and gaseous substances of various kinds. It may be acetone hydrogen or propane butane acetylene T1 alcohol T2 oil and petroleum products gasoline class T3 T4 diethyl ether carbon disulphide T5.
Explosion-proof led lamps have the Ex marking. About whether the selected model to this group of appliances can be learned from the accompanying documentation in the Certification section. Here you specify the type of protection m d e and temperature class T1-T6. And also the category of apparatus I or II in accordance with the purpose and degree of protection.
Transcript of marking vzryvozaschischennaya equipment
The last of these parameters must be high from IP65 or more. Otherwise, the probability that such a device will not sustain operation during intense dust and humidity.
All these parameters are determined on the basis of the conditions in which you plan to operate the lamp.
Input voltage of led light sources may be different 220V to 12V. Accordingly, the explosion-proof execution is represented by different designs. The preferred model is a low-voltage lamp. Additionally, if you select is considered the permissible ambient temperature.
Devices category I operated under the temperature range from -20 to +85 degrees. Lamps falling under category II work effectively at ambient temperature within -60 to+50 degrees.
Not less important characteristics of light source power luminous flux color temperature. That the instrument is served as long as possible is recommended to choose a design with the emitters of well-known brands Cree, Nichia, and others.
Often manufacturers specify the recommended power supply cable cross section protection class from electric shock. Additional functions such as auto power off, under certain conditions, protection against changes in mains voltage ensure safety of operation.
One of the leaders in the production of explosion-proof lamps group of companies Lighting technologies. The range of products presents different types of performance led fluorescent gas discharge. Developed 10 equipment lines. Among the most popular lamps of the Hector Led, Atlas Led.
Model Hector Led
The first group presents performances of different power 20-120 watts they are all characterized by a protection degree IP66. The design provides ballast brand MeanWell and Cree emitters.
Recommended ambient temperature from -60 to +55 degrees. The devices of this series can be operated without loss of efficiency when changes in the network voltage in the range of 85 to 265 V. the Diameter of the inlet power cable from 10 to 14 mm. in Different models in this series feature temperature class T5 or T4. Material: diffuser in tempered glass. On set of the mentioned parameters it is possible to speak about high reliability of this line.
The PPP model 30 Bun 1Ех
Another group of lamps Atlas Led presents performances with the same degree of protection IP66. Brand BALLASTS and CREE diodes. The temperature class of products of this group is T5 or T6. The range of capacities of different models in the range 10-120 watts. The supply voltage can be 12V 24V or fit to be in the range of 185 to 265V.
Another company offering high-quality products Focus. One of the models of PPP 30 Bun 1Ех. The design uses Cree diodes of the power unit 30 W degree of protection IP65 material of lens polycarbonate. Permissible temperature from -60 to +45 degrees.
Regardless of the type of light source led luminous performance lamps must be installed at a sufficient distance from the workplace so as not to interfere with the process.
For example, the height of mounting the sling on the industrial sites can vary in the range from 5 to 10 m. In some cases is allowed the variant less than 5 m and 10 m
The designated class room
Given the high degree of protection of enclosure thickness of the lens material characteristics, the presence of an additional reinforcement as well as a significant distance from the workplace, the lamp must provide a sufficient level of visibility in accordance with the requirements in different sites. Switching devices should be placed outside the hazardous area.
Thus for illumination of objects of various purpose in which the operating conditions fall within the definition of hard dust, moisture and aggressive environment, the risk of mechanical damage etc., it is recommended to use lamps of a special group of explosion-proof. Choosing the right execution should be performed based on such parameters as temperature class supply voltage type of protection marking degree of protection permissible temperature range of the environment. Important characteristics of light source power diode luminous flux color temperature.
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