1. The explosion -proof lamps' explosion -proof categories, levels and temperature groups see national standards.

2. It is divided into five main types: explosion -proof type, increased safety, positive pressure type, sparkless and dust -proof explosion -proof type. It can also be combined or composite and special types of explosion -proof types and the above -mentioned explosion -proof types and the above -mentioned explosion -proof types. Essence

3. According to the anti -electrical protection type, it can be divided into Class Ⅰ, Ⅱ, and III. In order to prevent explosion -proof lamps from being easily touched by parts of the parts, the conductor of the human body shocked or different potentials touches the electric spark to ignite the explosive mixture.

Class A Ⅰ -On the basis of basic insulation, the non -charged conductive components that are not charged when they touch the normal work are connected to the protective ground conductor in a fixed line.

Class BI Ⅱ —— Use dual insulation or enhanced insulation as safety protection measures, without ground protection.

Class C Ⅲ -The safety voltage of the effective value is not greater than 50V, and it will not produce higher than this voltage value.

Class D0 -relied on basic insulation as security protection measures. Most of the explosion -proof lamp anti -electrical protection types are Class I lamps, and only a few are class Ⅱ and III lamps. For example: full -plastic explosion -proof lamps, explosion -proof flashlights.

4. Classification according to the protective level of the shell: In order to protect the dust, solid foreign body and water into the lamp cavity, it touches or accumulates the risk of jumping, short -circuit or damage to electrical insulation on the banded parts. The role of insulation. Use the characteristic letters "IP" to characterize the shell protection level with two numbers. The first number represents the protection of people, solid foreign bodies or dust. Divided into level 0-6. Explosion -proof lamps are a sealing lamp. Its dustproof capacity is at least 4 or more. The second number represents the protection of water, divided into 0-8.

5. Classification of supporting surface materials designed by lamps: indoor explosion -proof lamps may be installed on many walls and ceilings that belong to the surface of ordinary combustible materials, such as wooden walls and ceiling. Depending on whether explosion -proof lamps can be directly installed on the surface of ordinary combustible materials, it can be divided into 2 categories.

One is a lamp that is only suitable for installed on non -combustible surfaces.

The other is a lamp that is suitable for the surface of ordinary combustible materials, with labeling symbols.

6. It can be divided into fixed, migrant, and portable formula according to the form of installation.