Ex d IIC T3 Gb is a complete explosion protection marking, the meaning of its parts is as follows:
Ex: indicates that the equipment is explosion-proof electrical equipment, is the abbreviation of the English “explosion-proof”, which is all explosion-proof equipment must have the sign.
d: stands for explosion-proof explosion-proof mode, standard number GB3836.2. Explosion-proof equipment refers to the possibility of generating sparks, arcs and dangerous temperatures of the electrical components into the shell with explosion-proof performance, the shell can withstand the explosion pressure of the internal explosive gas mixture, and to prevent the internal explosion to the shell surrounding the propagation of explosive mixtures.
IIC:
II means that the equipment is suitable for explosive gas environment in non-coal mine underground such as factories, etc. C means that the equipment is suitable for IIC gas in explosive gas environment;
C means that the equipment is suitable for IIC gases in explosive gas environments. IIC gases have extremely high explosive hazards, the representative gases are hydrogen and acetylene, which have the most stringent requirements for explosion-proof equipment.
T3: The maximum surface temperature of the equipment should not exceed 200℃. In explosive environments, the surface temperature of the equipment is an important safety indicator. If the surface temperature of the equipment is too high, it may ignite the surrounding explosive gas mixture and cause an explosion.
Gb: stands for Equipment Protection Level. The “G” stands for Gas and indicates that the equipment is suitable for use in gas explosion-proof environments. Equipment with a Gb rating can be used in Zone 1 and Zone 2 hazardous areas.
Post time: Jan-09-2025