Fabrication of 10kV XLPE insulated power cable intermediate joint

Author：hlyb Add Time：2016-03-03 15:28:34

Manufacturing steps of 10kV XLPE insulated power cable intermediate joint:

1. Cut cable

Overlap the two sections of cables to be jointed from the fracture, and the overlapping length is 200 ~ 300mm; Measure and mark the center line of the overlapping length. At the same time, keep the black filling and turn it back without cutting.

2. Core wire treatment

Put one long and one short black plastic pipe with a diameter of * * * in the heat shrinkable kit into two sections of cable respectively, and then deal with the wire core

3. Close up of pencil head

The pencil head treatment is used to disperse the electric field and distribute the stress.

4. Clean the semiconducting layer

Clean the core wire with the attached cleaning agent (note that the operator should keep his hands clean in the whole process)

5. Wrapped stress control tube

Stress evacuation glue and put it into the stress control pipe (black short pipe in the figure)

6. Baking stress control tube

On the right is the baked stress tube

7. A shielding copper net is sleeved at the tail of the long end

8. Insert insulating materials in turn,

The long end is sheathed with insulating material in turn, and the short end is sheathed with inner semi conducting tube; At the long end, insert (1, inner red inner insulating tube), (2, middle red outer insulating tube), (3, outer black outer half conducting tube) in sequence as shown in the figure; Insert the black inner half conducting tube at the short end

9. Crimping core wire

Pay attention to the crimping quality (the crimping pliers are imported from Germany and fully automatic)

10. Grinding the compression joint

Grinding to eliminate ****** discharge

11. Wrapping on joint

Wrap the black semi conducting tape around the joint and fill the pencil head with stress glue. Wrap the black semi conducting tape on the joint, and the outer diameter of the joint is consistent with the size of the main insulation after wrapping; Fill the pencil head with red stress glue and hide the pencil head

12. Baking inner semi conducting tube

Move the black inner semi conducting tube with the short end sleeved into the joint, bake and shrink, and clean the insulating layer (white), semi conducting tube (black) and stress tube (black) of the whole core wire with supporting detergent

13. Baking internal insulation

Move the red inner insulating pipe sleeved into the inner layer of the long end * * * to the joint, wrap the hot-melt adhesive around the two nozzles of the pipe, and then heat and shrink from the middle to both ends.

14. Baking external insulating pipe

Move the red outer insulating pipe sleeved into the second layer of the long end to the joint, wrap the hot melt adhesive around the two pipe orifices of the pipe, then heat and shrink from the middle to both ends, and wrap high-pressure waterproof tape around both ends for sealing after completion

15. Baking Outer Semiconducting Layer

Move the black outer semi conductive layer sleeved into the outer layer of the long end * * * to the joint, wrap the hot melt adhesive around the two nozzles of the pipe, and then heat and shrink from the middle to both ends

16. Each phase is sheathed into copper mesh shield respectively

Move the sheathed long end and the shielding net to the joint, level the shielding net on each phase by hand, and pay attention to press both ends of the copper net on the original shielding layer of the cable and solder it

17. Binding and shaping

Turn back the filler (see Figure 1) turned up when cutting the cable, and then bind the three-phase core wires together with white gauze tape. Note: whether the joint is round and flat is all here

18. Binding and shaping 2

If possible, a layer of high-voltage heat shrinkable tape can be wrapped outside the white gauze tape to increase the sealing insulation. It can also be wrapped unconditionally

19. Welding ground wire

Connect (weld) the protective steel armor at both ends of the joint with the attached braided copper wire.

20. Baking outer sheath

When the long outer protective sleeve already sleeved in one end of the cable is moved beyond the crimping pipe, it begins to shrink

21. Baking outer protective layer 2

Move the short outer protective sleeve that has already been sleeved in the cable at the other end to the position beyond the pressure connecting pipe, and cover the long outer protective sleeve that shrinks first by 100mm to start heat shrinkage.

22. Completion

Wrap and seal the overlapping part of the outer sheath with black tape. So far, the fabrication of the middle end of the cable is finished!

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Fabrication of 10kV XLPE insulated power cable intermediate joint