Abstract:This paper conducts an in-depth analysis of the application taboos and grounding principles of explosion-proof distribution boxes, analyzes the common risk factors in explosion-proof distribution box systems, and puts forward targeted application taboos and grounding principles, which provides a strong guarantee for the safe operation of explosion-proof distribution box systems.
Introduction. With the continuous development of industrial production, there are more and more dangerous places, and the explosion-proof distribution box system plays an increasingly important role in safety production. The explosion-proof distribution box system should comply with the principles of safety, reliability, economy and reasonableness, and should meet the needs of production technology and equipment operation. However, in the actual operation process, due to improper operation, equipment failure and other reasons, it may lead to the failure of the explosion-proof power distribution system, which may lead to accidents. Therefore, it is of great significance to have an in-depth understanding of the contraindications and grounding principles of explosion-proof distribution box to improve the safety performance of explosion-proof distribution box system.
Risk factors for explosion-proof distribution box systems.
1. Electrical sparks.
Electrical sparks are one of the main causes of accidents. In explosion-proof distribution box systems, electrical sparks can be generated by the following factors:
1) Equipment failure: such as insulation aging, wire short circuit, insulation breakdown, etc.;
2) Operation errors: such as improper operation of switches, untimely maintenance, etc.;
3) External factors: such as lightning strikes, static electricity, etc.
2. ** sexual mixture.
*Sexual mixture refers to the mixture formed by combustible gas, vapor, dust and air under certain conditions. This mixture can trigger when it encounters an electrical spark or other ignition source**. The explosion-proof distribution box system should take corresponding protective measures against different types of ** mixtures.
Contraindications for the use of explosion-proof distribution boxes.
1. Strict selection of equipment.
In the explosion-proof distribution box system, explosion-proof electrical equipment that meets the relevant national standards should be selected. The following factors should be considered in the selection of equipment:
1) the type and grade of the mixture;
2) the environment in which the equipment is used;
3) the protection level of the equipment;
4) The electrical performance of the equipment.
2. Reasonable layout.
The layout of the explosion-proof distribution box system should be reasonable, and the long-distance transmission of the best mixture should be avoided as much as possible. At the same time, the connection between devices should be reduced to reduce the risk of failure.
3. Strict operating procedures.
The operator should be familiar with the principle and operating procedures of the explosion-proof distribution box system, and operate in strict accordance with the regulations. During operation, the following points should be noted:
1) Prevent insulation aging and damage;
2) Prevent wire short circuit, insulation breakdown and other faults;
3) Regularly inspect the equipment and deal with problems in a timely manner;
4) Avoid operator errors.
4. Grounding principle.
Grounding is a key part of the safe operation of the explosion-proof distribution box system. The grounding principle should be guided by the following:
5. Equipment grounding.
The metal enclosure of all equipment in the explosion-proof distribution box system should be reliably grounded to ensure that the potential between the equipment enclosure and ground is the same, reducing the risk of electrical sparks.
6. Protective grounding.
A special grounding wire should be used for protective grounding to ensure that the grounding resistance meets the requirements. At the same time, it should be avoided to share the grounding wire between the protective grounding and the working grounding and lightning protection grounding of the equipment.
7. Anti-static grounding.
In places that are prone to static electricity, anti-static grounding measures should be taken to introduce static electricity into the ground to avoid accidents caused by static electricity.
Conclusion. The safe operation of the explosion-proof power distribution system is of great significance for the safety of production in the field of industrial production. In order to improve the safety performance of explosion-proof power distribution systems, contraindications and grounding principles should be deeply understood and used. By analyzing the risk factors of the explosion-proof distribution system, and putting forward the targeted application taboos and grounding principles, it is helpful to reduce the risk of accidents and ensure the safe operation of the explosion-proof distribution system. Explosion-proof distribution box