This article outlines the common issues associated with **high-voltage cables** and explores their root causes. Historically, **high-voltage cable joints** were manufactured using methods such as wrap-around, die-cast, and mold-type techniques. These approaches required significant on-site labor and were often limited by environmental conditions and manufacturing constraints. As a result, air gaps and impurities frequently formed between insulating layers, increasing the likelihood of failures. In China, the most commonly used types today are assembled and prefabricated joints, which offer better consistency and reliability.
Cable joints are generally categorized into **end connectors** and **intermediate joints**. Regardless of the type, failures typically occur at the point where the insulation shield is broken, as this is where electrical stress is concentrated. Manufacturing-related issues—such as defects in the stress cone, problems with insulation fillers, or oil leakage from seals—can all contribute to joint failure.
The **cable grounding system** plays a crucial role in ensuring safe operation. It includes components like the grounding box, grounding protection box (with a protective layer arrester), cross-interconnect box, and cover protectors. Common issues arise when the boxes are not properly sealed, leading to multiple grounding points and excessive induced currents in the metal sheath. Additionally, improper selection of protective layer arrester parameters or unstable zinc oxide crystal quality can result in damage to these critical components.
The first branch factory of the Tianjin Cable Factory was established in 1972, specializing in the production of a wide range of cables, including mining communication cables, optical fibers, RS485 communication lines, computer cables, super five cables, control cables, shielded cables, flame-retardant and explosion-proof mine cables, audio signal cables, local telephone cables, Category 6 network cables, mine network cables, airport lighting cables, photoelectric composite cables, shielded twisted pair cables, and steel wire armored cables. With decades of experience, we provide high-quality solutions tailored to various industrial needs. We welcome your inquiries and look forward to serving you.
Steel Belt Traction Machine
Steel belt elevator advantages
1. Steel belt traction elevator, can maximize the utilization rate of well, reduce the top height, reduce pit depth.
2. Maintenance-free: the inner steel belt is multi-strand high strength steel wire, the surface is polyurethane polymer material, without lubrication.
3. High life: the life of steel belt is 2â€3 times that of traditional steel wire rope.
4. High efficiency: the steel belt and wheel contact area is larger, more efficient and energy saving.
5. Noise reduction: steel belt and wheel friction noise is less.
6. Because the diameter of the main wheel and the regulating wheel of the steel belt becomes smaller, there is no need for Angle change, which is beneficial to prolong the life of the steel belt and smooth operation.
Notes for installation of steel belt elevator
1. High levelness is required for the steel belt host due to the larger width of the traction wheel.
2. At the same time, ensure the levelness of the main wheel and the regulating wheel in all directions to prevent the deviation of the steel belt.
3, keep the cleanliness of the steel belt.
4, FAXI steel belt host specially equipped with McGowdy steel belt, pay attention to the rough surface of the steel belt and traction wheel contact when installing.
5. Confirm the consistency of the tension force of each steel belt
Belt traction machine,Steel belt traction machine,gearless traction machine,Belt motor,gearless motor
Suzhou Keffran Parts Co.,ltd , https://www.keffran-elevatorsmart.com
