Knowledge of explosion - proof grade for wireless remote control

Updatetime:2017-09-25 14:45:16

       Explosion-proof electrical equipment, explosion-proof grade is divided according to the type of equipment used, the explosive gas mixture temperature groups, explosion-proof electrical equipment, explosion-proof type to divide.

       Explosion-proof electrical equipment is divided into two categories: Class I for coal mine electrical equipment; II for mines other than the use of electrical equipment, according to the maximum test safety clearance (MESG) or minimum ignition current (MICR) to distinguish, Equipment is divided into: IIA, IIB, IIC three categories.

       The above four categories are mainly based on different working conditions may be detonated the smallest spark energy, China and Europe and the world most of the countries and regions will be divided into four dangerous levels of explosive gas.

According to the ignition gas mixture according to the ignition temperature difference, the group is divided into T1, T2, T3, T4, T5, T6 six, the ignition temperature with t (℃), the ignition temperature of each group:

       T1 is: 450 ° C

       T2 is: 300 ℃

       T3 is: 200 ° C

       T4 is: 135 ° C

       T5 is: 100 ℃

       T6 is: 85 ° C

       Again, for different purposes, explosion-proof electrical explosion-proof type is different, the type of points include:

       1, explosion-proof type, marked as d;

       2, by security type, marked as e;

       3, positive pressure type, marked as P;

       4, intrinsically safe, marked as i,

       5, oil-filled, marked as o;

       6, filled with sand, marked as q;

       7, no spark type, marked as n;

       8, pouring type, marked as m;

       9, airtight type, marked as h.