Analysis of wire and cable explosion fire causes and prevention program

In recent years, the global power system fire accidents, cable explosion fire events are also common, the main reason is that the insulation layer of power cables is composed of paper, oil, hemp, rubber, plastic, asphalt and other combustible substances, with the possibility of fire and explosion. Then the next editor will introduce you to the causes of wire and cable fire and explosion.

Insulation damage caused by short-circuit failure

Power cable protection lead skin in the laying was damaged, or in the operation of the cable insulation by mechanical damage, caused by the breakdown of cable insulation between the phases or between the lead skin, resulting in an arc so that the insulation material and the cable outside the protective layer of material burning fire.

Cable overload operation for a long time

Prolonged overload operation, the operating temperature of the cable insulation material exceeds the maximum permissible temperature of normal heating, so that the cable insulation aging and drying. Due to the cable insulation aging and drying, so that the insulating material to lose or reduce the insulating properties and mechanical properties, and thus prone to breakdown fire burning, and even along the entire length of the cable at the same time in a number of combustion fires.

Oil-immersed cables due to the difference in height occurs flow, oil leakage

When the oil-immersed cable laying height difference is large, may occur when the cable oil flow phenomenon. Cable oil flow will make the upper part of the cable due to the loss of oil and dry, the thermal resistance of this part of the cable increases, so that the paper insulation is scorched and early breakdown. In addition, the cable moisture and oil leakage increase the chance of failure and fire. As the upper part of the oil flow downward, in the upper part of the cable head to make space and generate negative pressure, so that the cable is easy to absorb moisture and make the end of the moisture, the lower part of the cable due to the accumulation of oil and generate a lot of static pressure, prompting the cable head leakage of oil.

Intermediate joint box insulation breakdown

Cable joint box intermediate joints due to crimping is not tight, welding is not secure or improper choice of joint materials, resulting in the operation of the joint oxidation, heat, glue flow; in the middle of the cable joints, injected in the intermediate joint box of the insulating agent quality does not meet the requirements of the insulating agent, filling, the box within the memory of the air holes and cable box sealing is poor, damaged and leakage into the moisture, the above factors can cause insulation breakdown, the formation of a short-circuit, so that the cable explosion Fire.

Cable head burning

Due to the surface of the cable head moisture accumulation of dirt, cable head ceramic casing rupture and lead wire phase distance is too small, resulting in flashover fire, caused by the cable head surface insulation and lead wire insulation burning.

External fire and heat sources lead to cable fires

Such as the spread of fire in the oil system, the spread of the oil circuit breaker explosion fire, boiler pulverizing system or coal system coal dust spontaneous combustion, high temperature steam pipe baking, chemical corrosion of acids and alkalis, welding sparks and other fires, can make the cable fire.

Although the cable brings great convenience to our lives, but at the same time there are many uncontrollable factors, the quality of power cables directly affect the operation of the line safety, once the line can not be safe and stable operation, its failure to cause life and economic losses can not be predicted, so we Huaqiang cable to prevent the occurrence of cable failures at the root of the cable to minimize the occurrence of cable accidents, from the smallest scratch, and strive to Achieve the goal of safe and stable power supply.

So the question is, how do we maximize the prevention of such explosions?

Here are some preventive measures for avoiding explosions and fires caused by electrical cables:

1. Proper Installation: Ensure all cables are installed by qualified professionals following industry standards and regulations. Use appropriate cables for the intended application and environment.

2. Regular Inspections: Conduct regular inspections of electrical wiring and equipment to identify signs of wear, damage, or overheating. Replace or repair faulty cables immediately.

3. Quality Materials: Use high-quality, certified cables and components that meet safety standards. Avoid using substandard or counterfeit products. Learn more super quality materials from Sunua.

4. Correct Sizing: Ensure cables are appropriately sized for the electrical load they will carry. Overloading can lead to overheating and potential fire hazards.

5. Adequate Insulation: Verify that cables have proper insulation to prevent short circuits and electrical faults. Insulation should be intact and suitable for the operating environment.

6. Avoid Physical Damage: Protect cables from physical damage by avoiding exposure to sharp edges, heavy impacts, or excessive bending. Use protective conduits or cable trays when necessary.

7. Proper Wiring Practices: Avoid overloading circuits and ensure proper grounding and bonding. Follow best practices for wiring layout to minimize the risk of overheating.

8. Fire Detection Systems: Install smoke detectors and fire alarms in areas with significant electrical installations to provide early warning of potential fires.

9. Emergency Protocols: Establish and train personnel on emergency response procedures for electrical fires and explosions. Ensure access to fire extinguishers rated for electrical fires.

10. Maintenance and Upgrades: Regularly maintain and upgrade electrical systems to meet current safety standards and address any wear and tear or technological advancements.

By implementing these preventive measures, the risk of electrical cable-related fires and explosions can be significantly reduced.