Classification of high-voltage power cable connector types
The head of the high voltage power cable is used for the connection of the power cable itself, with connection joints, insulated intermediate joints, plug-in connectors for oil-filled power cables and steel pipe power cables, and the like.
1. Ordinary connector In the high-voltage power cable line, the straight-through connector must be connected to the cable core conductor to ensure the electrical connection, and the connector of the self-contained oil-filled power cable must keep the oil flow in the core. In the increase around the insulation shield, the two ends of the power cable insulation shield connected, there is a bright steel pipe insulation and the atmosphere, so you can withstand the oil pressure of the power cable.
2. Insulation joints Insulation joints have the same insulation structure and dimensions as ordinary joints. 110~220kV oil-filled power cable insulation joints are mainly used in large-length power cable lines, so that the metal sheath or metal shielding layer and semi-conductive layer of the power cables at both ends of the connection are electrically disconnected to facilitate cross-interconnection and reduce Cover (or shield) loss.
3. Plug-and-socket plugs Plug-and-socket connectors are the weakest link in the electrical performance of oil-filled power cable attachments, and they are also the most complex joints. It is mainly used for imperial impregnated paper-insulated power cable lines with a drop greater than the specified value to cut off the oil circuit to prevent the insulation of the high-end power cable from drying out, and the insulation oil pressure of the low-end power cable exceeds the specified value.
4. Steel pipe oil-filled power cable connector Copper pipe oil-filled power cable connector has two kinds of common connector and half-stop connector.
Ordinary connector for the length of the power cable connection, its internal insulation structure is generally phased with the self-contained oil-filled power cable connector, the shell is a copper pipe with a diameter slightly larger than the power cable pipe. Half-stop stoppers for longer oil-filled power cable lines. At the joint between the steel pipe of the joint and the power cable, the sealed cable structure is used to separate the power cable oil.
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