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Classification of explosion-proof forms of explosion-proof lamps

Time:2023-06-15 Views:0

1. The explosion-proof category, level, and temperature group of explosion-proof lamps are specified in the national standard.


2. According to the explosion-proof type, there are five main types: explosion-proof type, increased safety type, pressure type, and spark type dust explosion-proof type. Each explosion-proof type can be described as a combination or composite special type


3. According to the anti electric shock protection types I, II Class III anti electric shock protection prevents the easily accessible parts of the explosion-proof lamp casing from being electrified, causing the body to be electrocuted or the same potential conductor to come into contact with electric sparks and ignite explosive mixtures. Class A Ⅰ - Basic insulation foundation, easily accessible working live conductive parts are connected to fixed lines for protection. Class B Ⅱ - Double insulation or reinforced insulation is used as safety protection measures for protection. Class C Ⅲ - Use an effective voltage of 50V and its output is higher than the voltage value. Class D0 ——Relying on basic insulation for safety protection


4. According to the protection level of the enclosure, it can prevent dust, solid foreign objects, and water from entering the lamp chamber and causing danger such as ignition, short circuit, or damage to electrical insulation due to the accumulation of live parts. The protective type of the enclosure is used to protect electrical insulation, and its protection level is represented by the characteristic letter IP followed by two digits. The first digit represents the protection level of the enclosure Solid foreign objects or dust protection ability 0-6 levels explosion-proof lamps and sealed lamps with dustproof ability at least 4 levels. The second digit represents water protection ability 0-8 levels


5. According to the design of the lighting fixture, the support surface material category: Indoor explosion-proof lighting fixtures can be installed on ordinary combustible materials. Wooden wall panels on the surface allow explosion-proof lighting fixtures to be installed with surface temperatures exceeding safety values. Depending on whether the explosion-proof lighting fixture is directly installed on ordinary combustible materials, Class 2 is only suitable for installing non combustible surface lighting fixtures. Other types are suitable for directly installing ordinary combustible material surface lighting fixtures with marking symbols.