Power Cable Specifications and Models

Views:0     Author:Site Editor     Publish Time: 2021-10-09      Origin:Site

1. Cables are classified according to voltage levels.

Power cables are generally manufactured according to a certain voltage level. The voltage levels are divided into 0.5kV, 1kv, 3kv, 6kv, 10kv, 20kv, 35kv, 60kv, 110kv, 220kv, 330kV; among them, 1kV power cables are the most used.

 

Power cables with voltage levels of 3 to 35kV are often used in the main power supply lines of large and medium-sized buildings.

Power cables with voltage levels of 60 to 330kV are used for transmission lines that are not suitable for overhead conductors, river crossings and submarine laying.


According to the voltage thickness, it can be divided into low voltage cables (below 1KV) and high voltage cables (above 1KV).

Considering the construction technical requirements, the structural characteristics of cable joints, cable terminals, and operation and maintenance, it is divided into low-voltage power cables, medium-voltage power cables (1-10kV) and high-voltage power cables.


2. The cable is based on the integral type of the core section.

The conductive core of the power cable is manufactured according to a certain grade of nominal cross-sectional area, which is convenient for manufacturing, design and construction selection.

The nominal cross-sectional area series of power cables in my country are 2.5mm2, 4mm2, 6mm2, 10mm2, 16mm2, 25mm2, 35mm2, 50mm2, 70mm2, 95mm2, 120mm2, 150mm2, 185mm2, 240mm2, 300mm2, 400mm2, 500mm2, 600mm2, etc.

The series of nominal cross-sectional area specifications of high-voltage oil-filled cables include 100mm2, 240mm2, 400mm2, 600mm2, 700mm2 and 845mm2.


3. Classification according to the number of conductor cores.

There are 5 kinds of conductive cores of power cables from 1 to 5 cores.

Single-core cables are used to transmit single-phase alternating current, direct current and special occasions (high-voltage motor lead wires).

Oil-filled and gas-filled high-voltage cables with voltage levels of 60kV and above are mostly single-core.

Two-core cables are mostly used to transmit single-phase alternating current or direct current.

Three-core cables are used in three-phase AC power grids and are widely used in cable lines below 35KV.

Four-core cables are used for low-voltage power distribution lines, neutral grounded TT and TN-C power supply systems.

Five-core cables are used for low-voltage power distribution lines and TN-S power supply systems with grounded neutral points.


Two-core and four-core cables are low voltage cables below 1KV. specification 

3.6/6kv single core XLPE insulated steel tape armored PVC / PE sheathed power cable (yjv22 / yjlv22 / yjv23 / yjlv23)

3.6/6kv three-core XLPE insulated steel tape armored PVC / PE sheathed power cable (yjv22 / yjlv22 / yjv23 / yjlv23)


6kv.6/10kv single core XLPE insulated steel tape armored PVC / PE sheathed power cable (yjv22 / yjlv22 / yjv23 / yjlv23)

6/6kv.6/10kv three-core XLPE insulated steel tape armored PVC / PE sheathed power cable (yjv22 / yjlv22 / yjv23 / yjlv23)


8.7/10kv.8.7/15kv single core XLPE insulated steel tape armored PVC / PE sheathed power cable (yjv22 / yjlv22 / yjv23 / yjlv23)

8.7/10kv.8.7/15kv three-core XLPE insulated steel tape armored PVC / PE sheathed power cable (yjv22 / yjlv22 / yjv23 / yjlv23)


12/20kV single core XLPE insulated steel tape armored PVC / PE sheathed power cable (yjv22 / yjlv22 / yjv23 / yjlv23)

12/20kV three-core XLPE insulated steel tape armored PVC / PE sheathed power cable (yjv22 / yjlv22 / yjv23 / yjlv23)


18/20kv.18/30kv single core XLPE insulated steel tape armored PVC / PE sheathed power cable (yjv22 / yjlv22 / yjv23 / yjlv23)

18/20kv.18/30kv three-core XLPE insulated steel tape armored PVC / PE sheathed power cable (yjv22 / yjlv22 / yjv23 / yjlv23)


21/35kV single core XLPE insulated steel tape armored PVC / PE sheathed power cable (yjv22 / yjlv22 / yjv23 / yjlv23)

21/35kV three-core XLPE insulated steel tape armored PVC / PE sheathed power cable (yjv22 / yjlv22 / yjv23 / yjlv23)



26/35kV single core XLPE insulated steel tape armored PVC / PE sheathed power cable (yjv22 / yjlv22 / yjv23 / yjlv23)

26/35kV three-core XLPE insulated steel tape armored PVC / PE sheathed power cable (yjv22 / yjlv22 / yjv23 / yjlv23)




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