Nowadays, the application of explosion-proof motors is very extensive. Specifically, what data supports this? And it is extremely important in terms of operation safety. Why are more and more people choosing to use explosion-proof motors? Now, Nanyang Explosion-proof Motors will share the details for you:

1. Why use explosion-proof motors?

In some places with explosion hazards, when gas or dust meets an ignition source or high temperature, an explosion may occur. During the operation of a motor, arcs or electrical sparks may occur. These are strong ignition sources. When encountering explosive dust or gas, an explosion may occur.

2. The explosion-proof principle of flameproof motors:

The explosion-proof principle of flameproof motors is: The live components of the motor are placed in a specially designed enclosure. This enclosure has the function of isolating the sparks and arcs generated by the electrical components inside the enclosure from the explosive mixture outside the enclosure. It can withstand the explosion pressure generated when the explosive mixture entering the enclosure is ignited by the sparks and arcs of the electrical equipment inside the enclosure, without the enclosure being damaged.

At the same time, it can prevent the explosion products inside the enclosure from transmitting the explosion to the explosive mixture outside the enclosure, and will not cause an explosion of the explosive mixture outside the enclosure. This special enclosure is called a "flameproof enclosure". Motors with a flameproof enclosure are called "flameproof motors". The mark of a flameproof motor is "d". In order to achieve the explosion-proof and flameproof performance of the flameproof enclosure, there are special requirements for the shape, material, volume, and structure of the flameproof enclosure.

3. Precautions for wiring:

1. After the junction box is installed, check the electrical clearance and creepage distance:

The electrical clearance for 380/660V is 10mm, and the creepage distance is 18mm.

The electrical clearance for 1140V is 18mm, and the creepage distance is 30mm.

2. The inlet of the junction box is sealed by compressing a rubber ring. The weakness of this structure is the aging and loss of elasticity of the rubber ring, resulting in an inconsistent fit between the cable and the rubber ring.

3. For junction boxes with double outlets, the unused outlet should be blocked with a metal sealing sheet with a thickness of not less than 2mm. The outer diameter of the metal sealing sheet should be similar to the inner diameter of the outlet hole of the inlet and outlet device to ensure that the pressure plate or compression nut evenly compresses the sealing ring for reliable sealing.

3. Requirements for fans:

1. The surface resistance of the fan should not be greater than 1GΩ.

2. The distance between the fan and other fixed objects should not be less than 1/100 of the fan diameter and not less than 1mm.

3. When the fan material is aluminum alloy, the magnesium content is not allowed to be greater than 6%.

4. Protection of flameproof surfaces:

1. Flameproof surfaces are strictly prohibited from having defects such as bumps, scratches, rust, and paint.

2. Anti-rust oil should be applied regularly.

5. What is explosive dust?

Explosive dust is combustible dust, which refers to dust, fibers or fly flocs that can burn with or without a flame in the air and can form an explosive mixture with the air at atmospheric pressure and normal temperature.

6. Which dusts can explode?

The industries that produce combustible dust are divided into seven major categories:

Metal product processing.

Agricultural and sideline product processing.

Wood product / paper product processing.

Textile processing.

Rubber and plastic product processing.

Coal powder preparation in the metallurgical / non-ferrous / building materials industry and others.

The above is what Nanyang Explosion-proof Motors shared for you about why more and more people are choosing to use explosion-proof motors now, the explosion-proof principle of the product when in use, and the precautions when wiring that we need to know. Nanyang Explosion-proof Motors reminds you that it is necessary to find a professional team for installation and purchase of products.