High-voltage power cable connector for the connection of the power cable itself, a connector, the middle of the insulation connector, the oil-filled power cables and steel pipe power cables also stop the joints.
1 common connector
It is used to connect two adjacent power cables.
In high-voltage power cable lines, straight through connectors in addition to connecting the cable conductor to ensure electrical connectivity, the self-contained oil-filled power cable connector must maintain the oil flow in the core. However, because the connector is manually operated at the scene, the process conditions are poor. Therefore, the wire core connection adopts the process of concentrating the electric field at the connection of the wire core under the condition of crimping, and the safety of the connection head can be ensured by increasing the insulation thickness so as to reduce the work site strength of the connector. Usually around the insulation in the power cable insulation wrapped around the insulation by the ends of the cone-shaped stress cone. In the winding insulation around the package insulation shield, the two ends of the power cable insulation shield connected to the outside of a bright steel pipe to isolate the insulation and the atmosphere, so you can withstand oil-filled power cable pressure.
2. Insulation joints
Insulation joints within the insulation structure and size and the same common connector. 110 ~ 220kV oil-filled power cable insulation connector, mainly used for large-length power cable lines, so that the two ends of the power cable metal sheath or metal shield and semi-conductive layer is electrically disconnected in order to cross-connect, reduce Protective layer (or shielding layer) loss.
3 stopper type connector
Plug-in connector is the weakest link of the oil-filled power cable accessories, and is also the most complicated connector. It is mainly used for breaking the oil circuit in the mains impregnated paper insulation power cable with the drop greater than the specified value to prevent the high-end power cable insulation from drying up and the low-end power cable insulation oil pressure exceeding the specified value.
110kV single-chamber stop intermediate connector, usually with an epoxy sleeve to separate the power flow from the power cable.
220kV double chamber stop intermediate connector with two epoxy sleeves to separate the oil flow of the two power cables with an external cavity above the stopper tube of both power cables and two internal cavities containing the power cable and An external oil flow in communication, was two sealed structure.
4. Steel oil-filled power cable connector
Brass oil-filled power cable connector with a common connector and half-stop connector two.
Common connection for the manufacture of power cable length connection, and its internal insulation structure is generally self-contained oil-filled power cable connector phase, the shell is a slightly larger diameter than the power cable pipe brass. Half-plug fittings for longer steel-filled power cable lines. It is designed to avoid the loss of a large number of power cable sleeves in the event of an oil spill and is used to separate the oil supply sections so that the two sections of oil flow through the power cable insulation or by-pass pipes. In the joints of the steel pipe and power cable pipe connections, the use of sealed structure to separate the power cable oil.
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Ningbo Lingmai Machinery Manufacturing Co., Ltd. , https://www.lingmaimfg.com