The difference between explosion-proof lamps and ordinary lamps

The difference between explosion-proof luminaires and ordinary luminaires Explosion-proof luminaires are a type of lighting luminaires with explosion-proof performance and have a mark like Ex. The state has certain requirements for the sealing performance of explosion-proof lamps and further protective measures in the structure. Non-explosion-proof lamps have no more than one requirement.　　. For the explosion-proof category, level and temperature group of explosion-proof lamps, please refer to the national standards. .According to the explosion-proof type, it is divided into explosion-proof type, increased safety type, positive pressure type, non-sparking type and dust explosion-proof type. It can also be composed of other explosion-proof types and the above-mentioned explosion-proof types combined or composite and special types. .　　. According to the type of protection against electric shock, it can be divided into categories Ⅰ, Ⅱ and Ⅲ. The protection against electric shock is to prevent the easy-to-touch parts of the explosion-proof lamp housing from electrifying, causing electric shock to the human body or touching conductors of different potentials to generate electric sparks and ignite explosive mixtures.　　 Class AⅠ——On the basis of basic insulation, all the easily accessible conductive parts that are not charged during normal operation are connected to the protective grounding conductor in the fixed line.　　 Class BⅡ-Double insulation or reinforced insulation is used as a safety protection measure, without grounding protection.　　 Category CⅢ-Use a safe voltage with an effective value not greater than v, and there will be no voltage higher than this value.　　 Class D-only rely on basic insulation as a safety protection measure.　　 Most of the explosion-proof lamps with electric shock protection type are Class I lamps, and only a few are Class II and III lamps. For example: all plastic explosion-proof lamps, explosion-proof flashlights. .Classification according to the protection level of the enclosure: In order to prevent dust, solid foreign objects and water from entering the lamp cavity, touching or accumulating on live parts, causing flashover, short circuit or damage to electrical insulation, there are multiple enclosure protection methods to protect The role of electrical insulation. Use the characteristic letter 'IP' followed by two numbers to characterize the enclosure protection level. The first number indicates the ability to protect against people, solid foreign objects or dust. Divided into-level. Explosion-proof luminaire is a kind of sealed luminaire, its dustproof ability is at least grade above, the first number indicates the ability to protect against water, divided into-grade.　　. Classification according to the supporting surface material of the lamp design: Indoor explosion-proof lamps may be installed on many surfaces of common combustible materials, such as wooden walls and ceilings. They do not allow the temperature of the installation surface of the explosion-proof lamps to exceed the safe value. According to whether explosion-proof lamps can be directly installed on the surface of ordinary combustible materials, they can be divided into categories.