XLPE insulated PVC sheathed power cable

XLPE insulated power cable has excellent thermal - mechanical properties, excellent electrical properties and chemical resistance, also it has a simple structure, light weight, not drop restrictions on the laying, etc., is now widely used in urban power grids, mining and new cable plant.
Cable insulation - cross-linked polyethylene is the use of chemical and physical methods of linear polyethylene molecular structure into three-dimensional network structure of crosslinked polyethylene, which greatly improved the thermo-mechanical properties of polyethylene, thereby maintaining excellent electrical performance.
XLPE insulated power cable conductor maximum rated operating temperature of 90 ℃, than the PVC insulation, polyethylene insulated cables are high, so the carrying capacity of the cable is also further improved.
XLPE insulated PVC sheathed power cable
Requirements:
Operating temperature:
XLPE insulated PVC sheathed power cable
Conductor maximum rated operating temperature of 90 ℃
Conductor short-circuit temperature
XLPE insulated PVC sheathed power cable
Maximum temperature not exceeding 250 ℃, the longest no more than five seconds.
Installation laying temperature
XLPE insulated PVC sheathed power cable
Cable installation laying temperature not lower than 0 ℃
Air installation: ambient temperature 40 ℃
Laying in soil: ambient temperature 25 ℃

XLPE insulated PVC sheathed power cable
Selection Method:
Cable with rated voltage U0 / U (Um) to represent: U0 is the conductor cable designed for the rated power or frequency voltage between the metal shield, U is the rated power frequency voltage cable designed between conductors, Um is maximum equipment can withstand the maximum system voltage.
Depending on the cable laying environment and load, it is designed to select the cable specification model specifications. Non-armored for aerial, indoor, tunnels, ducts and other occasions, J can not bear external mechanical forces, armored with non-armored applicable conditions may be buried in the ground outside. Can withstand the mechanical force. Single core cables laid in the pipe generate a magnetic allowed in. Explosive, chemical corrosion and high temperature, low temperature and other occasions should choose special types of cables.

Storage and transport:
Cable in storage, should avoid prolonged outdoor packaging specifications sun exposure, a reliable seal both ends of the head, do not allow long-term storage in a humid environment, and the cable tray can not lie flat. Transport should consider fixed plate high and effective, several dishes at the same time does not allow lifting when lifting, non pushed from a height.

Laying Installation:

Cabling should use special tools, such as line planes, guide rollers, etc. to prevent mechanical damage during laying, away from heat.
When the cable through pipe laying, pipe diameter not less than 1.5 times the cable diameter, prohibit cable extrusion multiple cables through the tube, the total area of the cable does not exceed 40% of the total area of the tube.

XLPE insulated PVC sheathed power cable

Product Standards:
The product according to GB12706 "rated voltage 35KV Copper or aluminum conductor plastic insulated power cable" standard production, while also based on user needs recommended by the International Electrotechnical Commission standard IEC, British Standards, German Standards and US standards.
Scope:
Rated voltage 0.6 / 1KV and below power distribution lines or fixed installations only. Commonly used in aerial work.
Use features:
Rated frequency UO / U is 0.6 / 1KV.
Cable conductor allow long-term maximum operating temperature is 90 ℃.
Short (the longest duration of no more than 5s) of the conductor temperature does not exceed 250 ℃. .
The ambient temperature should not be less than 0 ℃.
Cable bending radius: not less than 15 times the cable diameter.
Number of cores:
Single, 2-wire, 3-wire, 4-pin, 5-pin, 3 + 1,3 + 2,4 + 1, pre-branch cables, etc.
Cable Category:
Classification according to the voltage and there is no strict division, but are divided according to industry generally accepted argument. Depending on the voltage, yjv cable can be divided
1KV and below low-voltage cable;
1KV ~ 10KV medium voltage cable;
10KV ~ 35KV high voltage cable;
35 ~ 220KV UHV cables.