Cable attachment joints play a linking role in transmission and distribution lines, and once mishandled, they can cause line failures such as fever, so there are very strict requirements for cable attachment joints in the lines. The following are the requirements for the standardization of cable accessory joints in the line and the corresponding operational considerations.

1, cable accessories conductor connection conductor connection requires low resistance and sufficient mechanical strength, the connection can not appear sharp corners. Low- and medium-voltage cable conductor connection is commonly used for crimping, crimping should pay attention to.

(1) select the appropriate conductivity and mechanical strength of the conductor connection tube.

(2) crimp the inner diameter of the tube and the outer diameter of the connected core with a clearance of 0.8 ~ 1.4 mm.

(3) crimped joint resistance value should not be greater than 1.2 times the equivalent cross-section of the conductor, copper conductor joint tensile strength of not less than 60N/mm2.

(4) before crimping, the conductor outer surface and the inner surface of the connection tube coated with conductive adhesive, and wire brush to destroy the oxide film.

(5) connection tube, core conductor on the sharp corners, burrs, etc., with a file or sandpaper to polish smooth.

2, cable accessories within the semiconductor shielding treatment.

Where the cable body has an internal shielding layer, in the production of joints must be restored to the part of the pressure receiver conductor joints within the shielding layer, the cable's internal semiconductor shielding are to leave a part, so that the connection tube on the connector shield can be connected to each other to ensure the continuity of the internal semiconductor, so that the field strength at the joint receiver uniform distribution.

3, cable accessories outside the semiconductor shielding processing.

Outer semiconductor shielding is a semi-conducting material that plays a role in uniform electric field outside the insulation of the cable and cable accessories joints, the same as the inner semiconductor shielding, plays a very important role in the cable and joints. The outer semiconductor port must be neat and uniform also requires a smooth transition with the insulation, and in the cable accessory joints to increase around the semiconductor band and the cable body outside the semiconductor shield lap connected.

4, cable accessories cable reaction force cone processing.

Construction shape, as accurate as inch reaction force cone, the potential distribution is equal throughout the cone surface, in the production of cross-linked cable reaction cone, generally using special cutting tools, can also be slightly heated with a slight fire, with a fast knife for cutting, the basic shape, and then 2mm thick glass repair scraping, and finally sandpaper from coarse to fine grinding, until smooth to.

5, cable accessories metal shielding and grounding treatment.

Metal shield in the cable and the role of the joint is mainly used to conduct the cable fault short-circuit current, as well as shielding electromagnetic field electromagnetic interference to the adjacent communication equipment, the operating state of the metal shield in a good grounding state at zero potential, when the cable after the fault, it has the ability to conduct short-circuit current in a very short period of time. Grounding wire should be reliably welded, both ends of the box cable body on the metal shield and armored tape firmly welded, the terminal head grounding should be reliable.

6, the sealing and mechanical protection of cable accessories joints.

The sealing and mechanical protection of the joints is to ensure the safe and reliable operation of the joints. Cable accessories should be prevented from seeping moisture and moisture in the joint, in addition to the joint location should be built joint protection slot or installed cement protection box.