WDZN-YJY cable

The yjv cable is a commonly used type of power cable, and even nowadays many people say that the cable refers to the yjv cable. The trunk of the tree shows its important position in power transmission. YJV cables are generally found in urban underground passages (under the manhole cover) or buried in the ground, and construction teams often cut off the power cables during construction, resulting in large-scale power outages, said It's the power cable.

Here are some brief introductions of yjv power cables:

Product name: copper core (aluminum core) XLPE insulated PVC sheathed power cable;

Product structure: The components of the yjv cable from the inside to the outside are conductors, polyethylene insulators, fillers (nylon, pvc composite materials, etc.), PVC outer sheath,

Among them, the conductors are mostly copper cores. At present, copper conductors are the conductor materials used in the market. Aluminum conductors are used less due to their poor electrical conductivity and lack of standards. The fillers are mostly nylon and other materials, which protect the core. It is equivalent to putting a "clothing" on the cable core; if it is an armored power cable, a layer of steel tape armor will be added between the filler and the sheath, so that the cable can be buried underground to resist compression The role of the steel tape armored yjv cable is yjv22; the PVC sheath is our common pvc material.

Product implementation standard: GB\/T12706.1-2008, IEC60502-1-1997 standard

Conductor material: copper material and aluminum alloy material, among which, the model code of aluminum core cable is yjlv;

Rated voltage: Generally, yjv cables are divided into four types: ultra-high voltage, high-voltage, medium-voltage, and low-voltage cables, and low-voltage power cables are usually used. High-voltage and ultra-high voltage are generally used for long-distance and ultra-long-distance power transmission. Low-voltage power cables (35 kV and below).

Temperature: The maximum long-term allowable working temperature of the cable conductor is 70 degrees Celsius. In the event of a short circuit (the longest duration does not exceed 5S), the maximum temperature of the cable conductor does not exceed 160 degrees Celsius, and the ambient temperature when laying the cable should not be lower than 0 degrees Celsius.

Uses: power cable for power distribution engineering, wire and cable for power transmission engineering, cable for electromechanical hydropower installation engineering, power transmission cable, power supply installation system control system, etc.

Installation precautions: The minimum bending radius of the cable is not less than 10 times the outer diameter of the cable. The yjv\/yjlv cable is laid indoors, in the channel and pipe, or buried in loose soil, and cannot withstand external forces. yjv22\/yjlv22 The cables are laid underground and can withstand mechanical external forces, but cannot withstand large tensile forces. Special tools should be used for cable laying, such as pay-off racks, guide rollers, etc., to prevent mechanical damage during the laying process and keep away from heat sources. When laying cables through pipes, The inner diameter of the pipe shall not be less than 1.5 times of the outer diameter of the tap, and it is forbidden to squeeze the cable when passing through the pipe, and the total area of ​​the cable shall not exceed 40% of the total area of ​​the pipe.

yjv cable product classification: ordinary type, flame-retardant type, fire-resistant type, low-smoke halogen-free type

Specifications and models: YJV cables can be single or composed of multiple conductors. The number of cores of YJV cables includes single core, 2 cores, 3 cores, 4 cores, 5 cores, 3 plus 1 core, 3 plus 2 cores, 4 plus 1 core, etc., of which 3 plus 1 core, 3 plus 2 core, 4 plus 1 core are composed of 2 kinds of conductors with different functions, one is called phase line, and the other is called ground wire, which is specially used for grounding. .Commonly used specifications are 1mm², 1.5mm², 2.5mm², 4mm², 6mm², 10mm², 16mm², 25mm², 35mm², 50mm², 70mm², 95mm², 120mm², 150mm², 185mm², 240mm², 300mm², etc. It consists of a 185mm² phase wire and two 95mm² ground wires.