1, conductor connection conductor connection requires low resistance and enough mechanical strength, the joint can not appear sharp Angle. Medium and low voltage cable conductor connection is commonly crimped, crimping should be noted:
(1) Select the appropriate conductivity and mechanical strength of the conductor connection tube;
(2) The fitting gap between the inner diameter of the pressure pipe and the outer diameter of the core of the connected wire is 0.8 ~ 1.4mm;
(3) The resistance value of the crimped joint should not be more than 1.2 times that of the constant section conductor, and the tensile strength of the copper conductor joint should not be less than 60N/mm2;
(4) Before crimping, the outer surface of the conductor and the surface of the connecting tube are coated with conductive adhesive, and the oxide film is destroyed with a steel wire brush;
(5) The sharp corners and burrs on the connecting pipe and conductor shall be polished smooth with a file or sandpaper.
2, internal semiconductor shielding processing.
Has the inner shield cable ontology, must restore when making joint pressure inside shield conductor section of the joint, both within the semiconductor shielding cable to set aside part of in order to make the connection pipe connection shielding can be interconnected in the head, to ensure the continuity of the semiconductor and make joint takeover of the field intensity distribution.
3. Processing of external semiconductor shielding.
The outer semiconductor shield is a semi-conductive material which plays the role of uniform electric field outside the insulation of cable and cable joint. Like the inner semiconductor shield, it plays a very important role in cable and joint. The outer semiconductor port must be neat and uniform and smooth transition with insulation, and the cable connector is connected with the outer semiconductor shield.
4. Processing of cable reaction force cone.
Construction shape, to the best of accurate to react cone, potential distribution on the cone is equal, in the production of crosslinking cable reaction cone, generally USES the special-purpose cutting tool, can also use a bit micro fire heating, use a sharp knife cutting, the basic shape, with a 2 mm thick glass scratch, in the end, from coarse to fine sand paper burnish, until smooth for until.
5, metal shielding and grounding treatment.
Metal shielding in the role of cables and connectors is mainly used for transmission cable fault short-circuit current, and shielding of electromagnetic field on the near electromagnetic interference, communications equipment running status under the metal mask in good grounding condition at zero potential, when after the cable is broken, it is in a very short time conduction ability of short circuit current. The grounding wire shall be solidly welded, the metal shielding and armored belt on the cable body of the box at both ends shall be solidly welded, and the grounding of the terminal head shall be reliable.
6, joint sealing and mechanical protection.
The sealing and mechanical protection of the joint are the guarantee of the safe and reliable operation of the joint. The cable joint should be prevented from infiltration of moisture and moisture. In addition, the joint protection groove or cement protection box should be installed at the joint position.
