The safety advantage of explosion-proof motors is higher than that of ordinary motors

Today we mainly understand the difference between explosion-proof motors and ordinary motors. With the development of technology and production, the number of places with explosion hazards is also increasing, such as flammable and explosive chemical plants, flour processing plants, breweries, oil field oil depots In areas prone to explosion hazards, it is necessary to use explosion-proof motors and other explosion-proof electrical products.

Of course, in recent years, China's highways have also developed rapidly, and a large number of fuel filling stations have emerged, providing a new market for explosion-proof motors. Considering the current environmental factors, in terms of safety, explosion-proof motors are higher than ordinary motors.

So now let's summarize the differences between explosion-proof motors and ordinary motors:

1. Explosion proof motors are completely sealed, and no gas is allowed to enter the interior of the motor, including the junction box, to avoid gas explosion caused by electric sparks. Explosion proof motors have higher requirements than ordinary motors in terms of electromagnetic design, structural dust prevention, wiring methods, insulation protection level, moisture resistance and mild corrosion resistance, and internal wire connection methods.

2. The sealing of the explosion-proof motor junction box is better than that of ordinary motors.

3. The minimum protection level for explosion-proof motors is IP55, while ordinary motors can be distinguished by their appearance, as they range from IP23, IP44, IP54, IP55, and IP56.

4. Ordinary motors can generate electric sparks, so it is not feasible to use ordinary motors in these places, which can easily cause accidents; Explosion proof motor is a type of motor that can be used in flammable and explosive factories, and does not generate electric sparks during operation. This way, it will not bring disasters to flammable and explosive places.

Next, we will learn about the product series and its characteristics

1. Flameproof motor

It uses an explosion-proof enclosure to isolate electrical parts that may generate sparks, arcs, and hazardous temperatures from the surrounding explosive gas mixture. However, this type of casing is not sealed, and the surrounding explosive gas mixture can enter the interior of the motor through the gaps between the joint surfaces of various parts of the casing. Explosion may occur when in contact with ignition sources such as sparks, arcs, and dangerous high temperatures inside the casing. At this time, the explosion-proof casing of the motor will not be damaged or deformed, and when the explosive flame or hot gas flows out through the gap of the joint surface, it cannot ignite the surrounding explosive gas mixture.

The basic series of low-voltage explosion-proof motor products widely used in China is the YB series explosion-proof three-phase asynchronous motor, which is a derivative product of the Y series (IP44) three-phase asynchronous motor. The explosion-proof performance complies with the provisions of GB3836.1-83 "General Requirements for Explosion proof Electrical Equipment for Explosive Atmospheres" and GB3836.2-83 "Explosion proof Electrical Equipment for Explosive Atmospheres" d "; The motor power range is O.55-200kW, and the corresponding frame number range is 80-315nun at the center of the frame; The explosion-proof signs are dI, dIIAT4, and dIIBT4, which are respectively applicable to fixed equipment underground in coal mines or IIA and IIB levels in factories. The temperature group is T1-T4, and combustible gases or vapors are mixed with air