Introduction to Explosion proof Motors

Explosion proof motor is a type of motor that can be used in flammable and explosive places without generating electrical sparks during operation. Explosion proof motors are mainly used in coal mines, oil and gas, petrochemicals, and chemical industries. In addition, it is widely used in sectors such as textiles, metallurgy, urban gas, transportation, grain and oil processing, papermaking, and medicine. Explosion proof motors, as the main power equipment, are usually used to drive pumps, fans, compressors, and other transmission machinery.
Explosion proof motors are mainly used in coal mines, oil and gas, petrochemicals, and chemical industries. In addition, it is widely used in sectors such as textiles, metallurgy, urban gas, transportation, grain and oil processing, papermaking, and medicine.
The rated voltage, rated current, power, and speed of explosion-proof motors are the same as those marked on ordinary motors. The difference is that explosion-proof motors have an explosion-proof mark: Ex.
1, Explosion proof type+equipment category+(gas group)+temperature group Explosion proof type:
1. Explosion proof Ex d2. Sand filled Ex q3. Increased safety Ex e4. Sealed Ex m5. Positive pressure Ex p
6. Type n Ex n7. Intrinsic safety type E x ia Ex ib8. Special type Ex s9. Oil immersed type Ex o10. Dust explosion-proof type DIP A DIP B2
2, Equipment category
Electrical equipment used in explosive gas environments is divided into:
Class I: Electrical equipment used underground in coal mines;
Class II: Electrical equipment used in explosive gas environments other than coal mines.
Class II explosion-proof type "d" and intrinsic safety type "i" electrical equipment are further divided into IIA, IIB, and IIC categories.
Electrical equipment used in environments with combustible dust is divided into: Type A dust tight equipment; B-type dust tight equipment.
3, Temperature group: T1~T6 Ignition temperature of combustible gases The highest temperature of electrical equipment T1 T>450 ℃ T2 450 ℃>T>300 ℃ T3 300 ℃>T>200 ℃ T4 200 ℃>T>135 ℃ T5 135 ℃>T>100 ℃ T6 100 ℃>T>85 ℃ With the development of technology and production, the number of places with explosion hazards is constantly increasing. For example, in the past, the production of edible oil used the traditional pressing process. After the 1970s, China began to introduce advanced oil extraction processes from abroad, but this process requires the use of chemical solvents containing hexane, which is a flammable and explosive substance; Therefore, the oil extraction workshop has become an explosion hazardous area, requiring the use of explosion-proof motors and other explosion-proof electrical products. For example, the rapid development of highways in China has led to the emergence of a large number of fuel stations, which has also provided a new market for explosion-proof motors.