How to identify true and false explosion-proof lamps
3. according to the type of protection against electric shock, it can be divided into I, II and III categories. The utility model relates to an electric shock protection device, in order to prevent the explosion proof lamp case from being touched, the parts to be electrified, to cause an electric shock of a human body or a conductor with different potential to touch and produce an electric spark, and to ignite an explosive mixture.A class I: on the basis of basic insulation, the accessible, normally operating, uncharged electrically conductive parts are attached to the protective grounding conductors in the fixed circuit.Class B - double insulated or reinforced insulation as a safety measure without ground protection.C class III - use a safe voltage of not less than 50V of effective value, and no voltage above this value will be generated.Class D0 - relying solely on basic insulation as a security measure.Most of the explosion-proof lamps, anti shock protection type is I class lamps, only a small number of category II, class III lamps. For example: all plastic explosion-proof lamps, explosion-proof flashlight jane.
Explosion proof lamp is a kind of lighting lamp with explosion proof performance. It has the sign such as Ex. The sealing performance of explosion-proof lamps and lanterns, and further protection measures in structure, etc., the state has certain requirements for explosion-proof lamps. Not explosion-proof lamps are not more than one requirement.1. explosion proof lamps and lanterns explosion-proof category, grade and temperature group, see national standard regulation.2 according to the explosion-proof type of explosion-proof, increased safety type, pressure type, no spark and dust explosion in a total of 5 main types, and also by other types of explosion-proof and the various types of explosion-proof combination or composite type and special type.
4 according to the classification of housing protection level: for the protection of dust, solid particles and water into the lamp cavity, touch or product set fire jump, short-circuit or destroy the electrical insulation of dangerous live parts, there are many ways to protect the protective effect of electrical insulation. Use the letter "IP" followed by two numbers to indicate the level of protection of the shell. The first figures indicate the ability to protect people, solids, foreign matter or dust. Divided into 0 - 6 levels. Explosion proof lamps and lanterns is a kind of sealed lamps and lanterns, its dustproof ability is at least 4 or more, second figures represent the protection ability to the water, divide into 0 - 8 levels.5 according to the support surface material classification: indoor lighting design of the explosion-proof lamps may be installed in many belong to the surface of common combustible materials, such as wooden walls and ceilings, they do not allow installation of explosion-proof lamps surface temperature exceeds the safety value. According to the explosion-proof lamps can be installed directly on the surface of ordinary combustible materials, can be divided into 2 categories.
