JianYun Cable

  Introduction The  volume resistivity of semi-conductive shields  plays a crucial role in determining the  electrical performance of high-voltage cables . These shields help  regulate electric field distribution, reduce partial discharge, and enhance insulation stability . However, traditional detection methods for  large-scale cables  suffer from several challenges: ✔  Manual sample preparation  results in uneven surfaces, leading to inconsistent test data. ✔  Low testing efficiency  makes large-scale quality control difficult. ✔  Current resistivity measurement techniques  lack precision, particularly for high-resistance samples. This study proposes  an improved testing process  using  large-scale cutting machines, fixed mold techniques, and copper sheet molds  to enhance the  accuracy and reliability  of volume resistivity detection for semi-conductive shields in  large-diameter cable...

  Introduction In the world of cable manufacturing, insulation materials play a critical role in ensuring safety, durability, and performance. A recent study published in  Wire & Cable  (December 2024) by researchers Deng Yiquan and Ke Kai explores an innovative approach to improving insulation compounds made from Chlorinated Polyethylene (CM) and Ethylene-Propylene-Diene Rubber (EPDM). The secret ingredient? Zinc Methacrylate (ZDMA), a compound that promises to enhance the properties of these rubber blends. This article summarizes the study’s findings, breaks them down into easy-to-understand insights, and offers an analysis of what this means for the cable industry—all while aiming to boost your understanding and our website’s ranking! Understanding the Materials Before diving into the study, let’s get to know the key players: Chlorinated Polyethylene (CM):  This is a type of plastic made by adding chlorine to polyethylene. It’s affordable, easy to process, and...

  Introduction With the rapid expansion of  10 kV high-voltage cable networks , cable failures have become increasingly frequent. One of the less common but critical failure causes is  insulation breakdown due to an energized ground wire . This study examines a  real-world 10 kV cable fault , analyzes its  root causes , and proposes  preventive measures  to ensure  safe and stable operation  of power distribution networks. 1. Case Study: Cable Fault Due to Ground Wire Energization 1.1 Fault Overview Cable Model:  10 kV YJLV22-3 × 240 mm² Installation Method:  Combination of  duct and trench laying Fault Location:  286 m underground cable section Operating History:  Commissioned in August 2011 1.2 Fault Discovery and Diagnosis Following a power outage,  automated system logs  identified a  short circuit between phases A and B , with a fault current of  3,100 A . Insulation testing yielded the follow...