Common faults in the use of power cables

In the daily operation of power systems, cable performance can often be affected by a variety of factors, including the quality of the cables themselves, improper installation, and inadequate maintenance. These issues can lead to various common problems and faults in power cable lines. Understanding these issues is essential for maintaining reliable electrical infrastructure. **Common Types of Cable Faults** - **Short-Circuit Fault**: This occurs when two or three phases of the cable come into contact, causing a sudden surge of current. Most short-circuit faults are the result of manufacturing defects or poor installation practices. - **Grounding Fault**: This happens when one or more cores of the cable discharge to the ground. If the insulation resistance drops below 10kΩ, it's considered low-resistance grounding. This type of fault is often caused by cable corrosion, cracks in the lead sheath, dry insulation, or faulty joints and materials. - **Open Circuit Fault**: This refers to a complete or partial break in one or more cores of the cable. Mechanical damage, changes in terrain, or previous short circuits can cause this type of failure. - **Hybrid Fault**: A combination of two or more of the above types of faults. These are more complex and require detailed diagnostic methods for identification and repair. **Causes and Solutions for Power Cable Failures** - **External Damage**: During storage, transportation, and installation, cables can suffer from external damage, especially those directly buried underground. Construction activities nearby can easily damage them. External damage accounts for nearly 50% of all cable failures. To prevent this, it's crucial to ensure high-quality work during installation and strictly follow safety protocols, such as the "ground-breaking" system. - **Corrosion of Protective Layer**: Corrosion due to stray currents or chemical exposure in non-neutral soil can weaken the protective layer, leading to insulation failure. Installing drainage equipment in high-current areas and using neutral soil or protective tubes can help mitigate this issue. Coating the cable with asphalt also provides additional protection. - **Overvoltage and Overload Operation**: Improper voltage selection, sudden voltage surges, or prolonged overloads can degrade the cable’s insulation and eventually cause breakdowns. Regular inspections and improved operational conditions are necessary to address these issues promptly. - **Water Ingress at Outdoor Terminal Heads**: Poor construction or incomplete sealing can allow water to enter the terminal head, leading to explosions or insulation failure. Strict adherence to construction standards, regular inspections, and timely repairs are essential. Oil leakage from the terminal head can also compromise the seal, accelerating aging and moisture absorption. In such cases, immediate action, like resealing, is required.  *Stay informed and prepared.* **Tags:** terminal head, power cable, two-phase short circuit, power system, common fault **Previous:** 12 types of parts usually included in fasteners **Next:** China's hardware safety locks purchase and daily maintenance knowledge

S-Type Load Cells

S-type load cells, also referred to as S-beam load cells, are force sensors specially designed to accurately measure both tension and compression. The name "S-type" is derived from their distinctive S-shape. Some users prefer to call them "Z-type," referring to their structured centre beam spring element.

The S-type load cells we offer vary in capacities, ranging from a nimble 25kg up to an impressive 30 tonnes. These units utilize advanced metal foil strain gauge technology. Their notable accuracy and compact design attributes make them a top choice for applications requiring precise force measurements. With easy and versatile installation using rod ends or load buttons, S-type load cells deliver outstanding performance for tension and compression applications alike.

Our range of S-type load cells is available in both low and high-capacity options. They are primarily designed to measure tensile forces but are equally competent in measuring compressive forces.

Built from stainless steel or aluminum alloy, depending on the range size, these sensors offer measurements from as light as 200g up to a hefty 1T. Their high precision, easy installation, and reliable stability are just some of their numerous advantages. With such robust features, they are a perfect fit for applications such as dosage scales, packaging scales, hook scales, and technical control equipment. Through precise force measurement, they enhance the reliability of these devices, helping to optimize operations and product quality.

Standard Load Cells,S-Type Load Cells,S-Beam Load Cells,Z Type Load Cells

Zhejiang Nanhua Electronic Technology Co., Ltd , https://www.nhloadcell.com