1. Explosion-proof luminaires for explosion-proof categories, levels and temperature groups are subject to national standards.
2. According to the explosion-proof type, there are 5 main types of explosion-proof type, increased safety type, positive pressure type, non-sparking type and dust explosion-proof type. It can also be combined with other explosion-proof type and various types of explosion-proof type. Special type.
3. According to the type of protection against electric shock, it can be divided into I, II and III. The anti-shock protection is to prevent the parts of the explosion-proof lamp housing from being easily touched, so that the human body is exposed to electric shock or conductors of different potentials to generate an electric spark to ignite the explosive mixture.
AI class - On the basis of basic insulation, connect the electrically conductive parts that are accessible during normal operation without electricity to the protective earthing conductors in the fixed line.
Class BII - Use double or reinforced insulation as a safety measure without grounding protection.
Class CIII - Use a safe voltage with an effective value of no more than 50v, and no higher than this voltage value will be generated.
Class D0 - rely solely on basic insulation as a safety measure.
Most of the explosion-proof lamps are protected against electric shock, and only a few are Class II and Class III lamps. For example: all-plastic explosion-proof lamps, explosion-proof flashlights.
Explosion-proof luminaires (9 sheets) 4. Classified according to the degree of protection of the enclosure: In order to protect dust, solid foreign matter and water from entering the lamp cavity, it may be dangerous to catch or accumulate on live parts to cause flashover, short circuit or damage to electrical insulation. A variety of enclosure protections protect electrical insulation. Use the characteristic letter "IP" followed by two numbers to characterize the degree of protection of the enclosure. The first number indicates the ability to protect against humans, solid foreign objects or dust. Divided into 0-6. Explosion-proof luminaires are sealed luminaires with a dust-proof capacity of at least 4 or more. The second number indicates the protection against water and is classified into 0-8.
5. Classification of support surface materials according to luminaire design: Indoor explosion-proof luminaires may be installed on many surfaces of common flammable materials, such as wooden walls and ceilings, which do not allow the temperature of the installation surface of explosion-proof luminaires to exceed safe values. According to whether the explosion-proof lamps can be directly installed on the surface of ordinary combustible materials, they can be classified into two categories.
One type is a luminaire that is only suitable for installation on a non-combustible surface.
The other type is a luminaire suitable for direct mounting on the surface of ordinary combustible materials, with marking symbols.
6. According to the installation and use form can be divided into fixed, portable, portable.
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