Types of high voltage power cable connectors

High-voltage power cable connector is used for the connection of the power cable itself, there are connectors, insulated intermediate joints, oil-filled power cables and steel power cables and plug-stop joints, etc. 1. ordinary connector it is used to connect two neighboring power cables. In the high-voltage power cable lines, through the joints in addition to connecting the core conductor to ensure electrical connectivity, the self-capacitance of oil-filled power cable connectors must keep the core oil flow unimpeded. However, because the connector is manually operated at the scene, its process conditions are poor. Therefore, under the condition of crimping on the line core connection, the electric field concentration problem of the core connection is handled by increasing the thickness of the insulation, which reduces the working field strength of the joint to ensure the safe operation of the connector. 2. Insulated joints: the structure and size of the insulation inside the insulated joints are the same as that of the ordinary joints. 110~220kV oil-filled power cables are insulated with insulated joints, which are mainly used for the large length of the power cables, so that the joints are made of metal sheathing or metal sheathing of the power cable at both ends. Power cable metal sheath or metal shielding layer and semi-conductive layer in the electrical disconnect, in order to interconnect the cross, to reduce the sheath (or shielding layer) loss. 3. plug stop joints: plug stop joints is the oil-filled power cable accessories electrical properties of the weakest link, but also the most complex structure of the joints. It is mainly used for the fall greater than the specified value of the crafty impregnated paper insulated power cable lines, cut off the oil circuit, to prevent the high end of the power cable insulation dry, the low end of the power cable insulation oil pressure exceeds the specified value. 110kV single chamber plug stop intermediate joints, usually with an epoxy resin casing will be the two high-voltage power cables separated from the flow of oil. 4. steel pipe oil-filled power cable joints: copper pipe oil-filled power cable joints have ordinary Connecting joints and half plug stop joints two kinds.

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