Electrical equipment selection must be explosion-proof of dangerous goods warehouse?
Yes! Dangerous goods warehouse in air contains a large amount of explosive gas matter! Selection of electrical equipment not only if riot! And explosion-proof level to reach the IIC can!!!!
Dangerous goods warehouse all switches, lamps and lanterns, motor must be a blast
The division of explosive gas environment hazardous area 0 area: present continuously or explosive gas mixture of environment for a long time. 1 area: the possible explosive gas mixture in the normal operation of the environment. 2 area: during normal operation is not possible environment of explosive gas mixture or even the appearance is only short existence environment of explosive gas mixture. 0 area generally exist only in the sealed container, storage tank internal gas such as space, in the process of real design 1 area there are very few, most of the time belongs to 2 zone. 1.2, explosion-proof electrical equipment is divided into two categories: type I in the coal mine with type II except mine electrical equipment used in electrical equipment, 1.3 class II electrical equipment, according to its biggest test is suitable for explosive gas mixture security clearance or minimum ignition current ratio, divided into type IIA, IIB, IIC three categories; And according to its maximum surface temperature into T1 - T6 six groups. 1.4, explosive gas mixture group according to the ignition temperature, as shown in table 1. 1.5, the explosive gas mixtures, according to its maximum experimental safe gap (MESG) or minimum ignition current ratio (MICR) classification, as shown in table 2. Table 1 group ignition temperature t (℃) T1 450 < > 300 < 450 > or less T2 T3 200 < 300 > or less 135 < 200 > or less T4 T5 100 < 135 > or less T6 135 < 100 > or less categories in table 2 Maximum experimental safe gap (MESG) (mm) minimum ignition current type IIA or greater than 0.9 < 0.9 > 0.8 IIB 0.9 p < > 0.45 or less MICR IIC acuities were 0.8 0.8 or less
