As the power system continues to develop and expand, cables play a pivotal role as a crucial transmission tool. However, the frequent occurrence of cable insulation breakdown poses a severe threat to the safe and stable operation of the power system. This article will elaborate on several reasons for cable insulation breakdown and their preventive measures.
1. Mechanical Damage to Insulation: Insulation layers can be damaged due to external factors such as scraping, compression, or piercing. Prevention measures include installing protective sleeves or using wear-resistant materials for reinforcement.
2. Improper Construction: Inadequate operations or improper joint handling during cable laying can result in insulation damage. To prevent this, it's essential to ensure that construction personnel possess professional knowledge and experience, following relevant standards during the installation process.
3. Insulation Moisture: Cable insulation may absorb moisture when submerged in water or exposed to high humidity, thereby reducing its insulation performance. It's crucial to avoid prolonged exposure of cables to humid environments and conduct regular inspections of the insulation status.
4. Overvoltage: Overvoltage refers to transient or sustained high voltage exceeding the rated value in a power system. Overvoltage generates significant electrical stress on the insulation layer, leading to breakdowns. Suitable protective devices like surge arresters or discharge coils can be employed to prevent this situation.
5. Insulation Aging: Over time, insulation materials may lose their insulating properties due to oxidation, heat aging, among other reasons. Regular inspections and testing of cable insulation conditions are necessary, followed by necessary replacements or repairs.
Cable insulation breakdown is one of the critical challenges faced by the stable operation of power systems. To enhance the reliability and safety of cable systems, addressing issues at the source is essential. Engineering designs should reasonably determine insulation distances, utilize high-quality raw materials, and prevent occurrences of deficiencies. Through scientifically effective preventive measures, we can ensure the stable operation of power systems.
Post time: Nov-24-2023