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About UsHongsheng Wire and Cable Co., Ltd. is a key enterprise in Zhejiang Province specializing in the production of wires and cables, integrating industry, commerce, trade, production, education, and research. Its main production, processes, and testing equipment are all designed and configured according to international standards.
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ProductsEmploy scientific management and quality assurance systems based on GB/T19001—IS09001 and GB/T24001—ISO14001 environmental management systems to organize production management.
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Contact UsWe believe: Great achievements depend on quality. Your satisfaction is our eternal pursuit!
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2020
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Cables: What factors affect the lifespan of rubber sheathed cables?
Today, electricity is widely used in our country. Rubber sheathed cables have penetrated all walks of life. The service life of cables directly affects production safety. The service life of cables depends on the oxidation induction time of the sheath material. The design service life of rubber sheathed cables is generally 20 years, but the actual service life is much longer. The most direct cause of cable aging is damage to the insulation layer. Many factors can lead to reduced cable insulation. Based on practical operating experience, the following situations are summarized. 1. Insufficient moisture resistance This situation is also common, usually occurring when directly buried in pipes or at cable joints. For example,
Today, electricity is widely used in our country. Rubber sheathed cables have penetrated all walks of life. Cable The service life directly affects production safety. The service life of a cable depends on the oxidation induction time of the sheath material. The design service life of a rubber sheathed cable is generally 20 years, and the actual service life is much longer than this value. The most direct cause of cable aging is damage to the insulation layer. There are many factors that can lead to reduced cable insulation. Based on practical operating experience, the following situations are summarized 。
1. Insufficient moisture resistance
This situation is also common, usually occurring when directly buried in pipes or cable joints. For example, if Cable the connector is unqualified or manufactured in a humid environment, water or steam will enter the connector, forming water branches over time under the action of the electric field, gradually destroying the insulation strength of the cable and causing failure.
2. External force damage
From the analysis of recent years' operation, especially in today's rapid economic development, a considerable number of electrical rubber Cable failures are caused by mechanical damage.
3. Long-term overload operation
In overload operation, due to the heating effect of the current, when the load current passes through the cable, it will inevitably cause the conductor to heat up. At the same time, the skin effect of the charge, the eddy current loss of the steel armor, and the dielectric loss of the insulator will also generate additional heat, thereby increasing the temperature of the cable. Long-term overload operation and high temperature will accelerate insulation aging and even insulation breakdown. Especially in hot summers, the increase in cable temperature usually leads to the first breakdown of the weak part of the cable insulation. Therefore, more failures of sheathed rubber cables occur in summer.
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Guangzhou Baiyun International Airport
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2021-04-13
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Address: Central Industrial Park, Luqiao District, Taizhou City, Zhejiang Province
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