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YJV is what cable YJV cable model specification introduction
Cables are essential components in power systems, serving as the backbone for transmitting electrical energy and information from one point to another. Among various types of cables, YJV cables stand out due to their widespread use and reliable performance. So, what exactly is a YJV cable, and what are its specifications?
YJV stands for Cross-Linked Polyethylene (XLPE) insulated and PVC sheathed cables. These cables are designed for rated voltages ranging from 0.6/1 kV up to 26/35 kV, making them ideal for power transmission and distribution networks. The conductor temperature can reach up to 90°C under normal operation, and during short circuits (lasting no more than 5 seconds), it can rise to a maximum of 250°C. This makes YJV cables highly durable and suitable for urban power grids.
In terms of structure, YJV cables come in various core configurations, such as single-core, two-core, three-core, four-core, five-core, and combinations like 3+1, 3+2, and 4+1. The 3+1 configuration, for example, includes three phase conductors and one ground wire, while 4+1 consists of four phase wires and one ground wire. These combinations ensure efficient and safe power delivery.
The standard sizes for YJV cables range from 1 mm² to 240 mm², with common options including 1.5, 2.5, 4, 6, 10, 16, 25, 35, 50, 70, 95, 120, 150, 185, 240, and more. For instance, a YJV 3×185+2×95 cable would have three 185 mm² phase conductors and two 95 mm² ground wires. These cables are widely used in underground power grids, power stations, industrial facilities, and even underwater applications where reliable power transmission is crucial.
Structurally, YJV cables consist of multiple layers: the conductor core, insulation layer, filler material, shielding layer, steel tape armor, and an outer sheath. The core is typically made of copper, though aluminum cores are occasionally used. The insulation is usually made of PVC or XLPE, while the outer sheath is made of polyethylene, offering both insulation and mechanical protection.
When it comes to installation, YJV cables are commonly laid indoors, in conduits, or directly buried in loose soil. They are not designed to withstand heavy external forces. On the other hand, YJV22 cables, which feature steel tape armor, are better suited for underground installations where mechanical protection is needed.
In summary, YJV cables are a vital part of modern power infrastructure, offering reliability, durability, and flexibility in a wide range of applications. Whether you're working on urban power grids or industrial projects, understanding the features and specifications of YJV cables is essential for safe and efficient electrical systems.