Ex d IIC T3 Gb is a complete explosion-proof mark, and its various parts mean the following:

Ex: indicates that the equipment is explosion-proof electrical equipment, which is an abbreviation of the English "explosion-proof", which is a sign that all explosion-proof equipment must carry.

d: represents flameproof explosion-proof mode, the standard number is GB3836.2. Flameproof equipment means that electrical components that may produce sparks, arcing and dangerous temperatures are placed in an enclosure with flameproof performance, which can withstand the explosive pressure of the explosive gas mixture inside and prevent the explosion inside from propagating to the explosive mixture around the enclosure.

IIC:

II indicates that the equipment is suitable for explosive gas environments in non-coal mines such as factories;

C means that the equipment is suitable for IIC gases in explosive gas environments. IIC gases have a very high explosion risk, the representative gases are hydrogen and acetylene, and this type of gas has the most stringent requirements for explosion-proof equipment.

T3: The maximum surface temperature of the equipment does not exceed 200 ° C. In an explosive environment, the surface temperature of the equipment is an important safety index, if the surface temperature of the equipment is too high, it may ignite the explosive gas mixture around it, causing an explosion accident.

Gb: indicates the Equipment Protection Level. The "G" stands for Gas, gas, which means that the equipment is suitable for gas explosion protection environments, and the Gb class equipment can be used in zone 1 and Zone 2 hazardous sites.