NEWS
03
2020
-
03
Explosion-proof motor classification
Author:
First, explosion-proof electrical equipment is divided into two categories: Category I is electrical equipment used in coal mines; II is electrical equipment used in places other than mines. Class II electrical equipment is divided into three categories: IIA.IIB.IIC.
Secondly, to understand the classification of explosion-proof grades, we must first understand the grouping of explosive gas mixtures according to ignition temperature: the groups are represented by T1.T2.T3.T4.T5.T6, and the ignition temperature is represented by t (℃). The ignition temperature of the T1 group is: 450℃<t; T2 is: 300℃<t≤450℃; T3 is: 200℃<t≤300℃; T4 is: 135℃<t≤200℃; T5 is ：100℃<t≤135℃; T6 is: 85℃<t≤100℃.
Thirdly, to understand the explosion-proof type of explosion-proof electrical, the types are divided into: flameproof type, marked as d; increased safety type, marked as: e; positive pressure type, marked as P; intrinsically safe type, marked as i; and: Oil-filled, sand-filled, encapsulated, etc.
After understanding these points, you can understand the classification of explosion-proof grades. Explosion-proof electrical equipment is classified according to the type of equipment used; the temperature group of explosive gas mixtures; the explosion-proof type of explosion-proof electrical equipment. For example, the explosion-proof mark is dIIBT4 means that the type of explosion-proof electrical products is explosion-proof, and it is used in Class II places where the ignition temperature of explosive gases is T4.
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2020-03-03
2020-03-03
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