This cable attachment takes the heat-shrinking middle head as an example. The two cables to be connected are overlapped from the fracture, and the overlap length is generally 200-300 mm (when the cable cross-section is large, the overlap length can be appropriately increased, which is advantageous for later operation).
This cable attachment takes the heat-shrinking middle head as an example.
1. Cut the cable.
The two cables to be connected are overlapped from the fracture, and the overlap length is generally 200-300 mm (when the cable cross-section is large, the overlap length can be appropriately increased to facilitate the later operation); the center line of the overlap length is measured. Make a mark and keep the black fill and then turn it off. Do not cut it.
2, core processing.
Insert one long and one short black plastic tube with the largest diameter into the two-stage cable in the heat shrink kit, and then process the core.
3, pencil head.
The pencil head treatment is used to disperse the electric field distribution stress.
4. Clean the semi-conductive layer.
Clean the core with the included cleaning agent (note that the operator must keep the hands clean throughout the process).
5. Wrap the stress control tube.
The stress relieves the glue and fits into the stress control tube.
6. Baking stress control tube.
7. Insert the shielded copper mesh at the end of the long end.
8. Insert the insulation material in turn.
Insulate the insulating material in the long end (inner red inner insulating tube, middle red outer insulating tube, outer black outer semiconductive tube), and short end into inner semiconducting tube (black inner semiconducting tube).
9. Crimp the wire bushing and burr on the casing (to prevent tip discharge).
10. Wrap the joint.
A black semi-conductive tape is wrapped around the joint and filled with stress glue on the pencil head. The black semi-conductive tape is wrapped around the joint, and the outer diameter of the joint after the wrapping is the same as the main insulation; the pencil head is filled with red stress glue, and the pencil head is filled.
11. Bake the inner semiconducting tube.
Move the black inner semi-conducting tube that has been inserted at the short end to the joint for baking shrinkage, and clean the insulating layer (white) and semi-conductive tube (black) and stress tube (black) of the entire core with a matching cleaning agent.
12. Insulation inside the baking.
The red inner insulating tube that is inserted into the innermost layer of the long end is moved to the joint, and the hot melt adhesive is wrapped around the two nozzle portions of the tube, and then heated and contracted from the middle to the both ends.
13. Bake the outer semi-conductive layer.
The black outer semi-conductive layer that is inserted into the outermost layer of the long end is moved to the joint, and the hot melt adhesive is wrapped around the two nozzle portions of the tube, and then heated and contracted from the middle to the both ends.
14. Each phase is nested in a copper mesh shield.
Move the long-end and shielded net to the joint, and level the screen with the hand on each phase. At the same time, pay attention to pressing both ends of the copper net on the original shield of the cable and soldering it with a constant force spring. Do not need to be welded, do not burn the cable sheath when welding).
15. Binding and shaping.
(1) Turn back the filler that was turned up when the cable was cut, and then tie the three-phase core wire together with a white tape to ensure that the connector is round and flat.
(2) It is possible to wrap a layer of high-pressure heat shrinkable tape outside the white yarn belt to increase the degree of sealing insulation. ,
16, welding ground wire.
Use the included copper wire to join (weld) the protective steel shackles at the ends of the joint.
17. Bake the outer sheath.
The long outer sheath tube that has been nested in one end of the cable is moved to the position beyond the crimping tube to start heat shrinking. Move the short outer sheath tube that has been inserted in the other end of the cable to the crimping tube position, and heat shrink when the long outer sheath tube that has been contracted first is caught 100 mm.
18. Complete.
The black tape is used for wrapping and sealing at the overlap of the outer sheath. At this point, the middle end of the cable is finished.
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