1, conductor connection conductor connection requires low resistance and enough mechanical strength, the connection can not appear sharp Angle. Medium and low voltage cable conductor connection is commonly crimped, crimping should pay attention to:
(1) Select the appropriate conductivity and mechanical strength of the conductor connection pipe;
(2) The gap between the inner diameter of the pressure pipe and the outer diameter of the connected wire core should be 0.8 ~ 1.4mm;
(3) The resistance value of the crimped connector shall not be greater than 1.2 times that of the conductor of equal cross section, and the tensile strength of the copper conductor connector shall 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 wire brush;
(5) The sharp corners and burrs on the connecting pipe and core conductor shall be polished 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 a uniform electric field outside the insulation of cables and cable joints. It plays a very important role in cables and cable joints, just like the inner semiconductor shield. The outer semiconductor port must be neat and uniform, smooth transition with the insulation is required, and the semiconductor tape winding in the cable connector is connected to the outer semiconductor shield of the cable body.
4, cable reaction force cone processing.
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 cable should be welded reliably, the metal shielding and armored tape on the body of the box cable at both ends should be welded firmly, and the grounding of the terminal head should be reliable.
6, joint sealing and mechanical protection.
The sealing and mechanical protection of the joint are the guarantee to ensure the safe and reliable operation of the joint. Moisture and moisture should be prevented from infiltrating into cable joints. In addition, joint protection groove or cement protection box should be installed at the joint position