JPH0532902Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Technical Field of the Invention) The present invention relates to the improvement of rubber or plastic insulated cables, especially when a CV cable is directly connected to electrical equipment such as a cubicle type gas insulated switchgear (C-GIS). Concerning useful rubber and plastic insulated cables.

(Technical background of the invention) Conventionally, so-called equipment direct connection type cables that are directly connected to electrical equipment such as C-GIS in a detachable manner have been used.
As shown in Figure 2, a semi-conductive rubberized tape is wound around a cable core 3 consisting of a conductor 1 covered with an insulator 2 such as cross-linked polyethylene, with the rubberized surface facing inward. Layer 4, wound layers 5 and 5' formed by winding two pieces of copper tape with a thickness of 0.1 mm, and a wound layer 6 of restraint tape made of non-woven fabric etc. are provided in this order, and a sheath 7 is further coated thereon. It is known that it consists of Note that the above-mentioned wound layer 4 has a thickness of 0.1 mm.
66~77kV consists of two rolls of copper tape.
For class CV cables, this is to ensure the necessary ground fault capacity with the cross-sectional area of the copper tape having such a configuration.

(Problems with the Background Art) By the way, in a device-direct cable with such a configuration, a short cable (1.2m to 4m) is held and the plug attached to the tip of the conductor is connected to a tulip contact inside the electrical device. If it is removably inserted into a cable, etc., the frictional resistance between the copper tape winding layers 5 and 5' and between the upper and lower tape winding layers 4 and 6 is small, so there is a problem that the cable sheath 7 may shift. There was an inconvenience that the tape was disturbed or torn.

(Purpose of the invention) The present invention was made to solve these problems.It is made of rubber and plastic insulation that makes it easy to attach and detach from electrical equipment, and that prevents the wound tape from being disturbed or cut. The purpose is to provide cables.

(Summary of the invention) The rubber-plastic insulated cable of the invention is a short cable that grips itself and is directly connected to electrical equipment in a detachable manner, and the cable is covered with semiconductive rubberized tape on the cable core. with the rubberized side facing outward, and then wrap a 0.2
Wrap only one piece of mm metal tape, and then wrap a rubberized tape on top of this with the rubberized side facing outward.
The above object is achieved by configuring the device by covering it with a sheath.

(Embodiment of the invention) Hereinafter, the invention will be explained based on the drawings of one embodiment.

FIG. 1 is a perspective view showing an embodiment of the present invention.

In FIG. 1, a semiconductive rubberized tape is wound around a cable core 8 consisting of a conductor 9 covered with an insulator 10 with the rubberized surface facing outward.

Then, the wound layer 11 of this semiconductive rubberized tape
On top of this, a metal shielding layer 12 is formed by winding a single piece of annealed copper tape with a thickness of 0.2 mm, and on top of that is a rubberized tape made of, for example, butyl rubberized tape, with the rubberized surface facing outward. It is wrapped around.

Here, the reason why the annealed copper tape is wound in one layer is to eliminate the reduction in frictional resistance between the copper tapes caused by conventional two-layer wrapping, and to reduce the thickness of the annealed copper tape. The reason why it is thick (0.2 mm) is to improve the mechanical properties due to thermal expansion contraction or bending of the insulator.

Furthermore, on top of the winding layer 13 of this restraining tape,
A sheath 14 of rubber or plastic is extrusion coated.

In a cable configured in this manner, the semiconductive rubberized tape is in close contact with the metal tape, and the winding layer of the restraining tape is integrated with the sheath.

Incidentally, when we measured the tensile strength between the sheath and conductor of the conventional cable (30cm) and the cable of the present invention (30cm), we found that the cable of the present invention has approximately 3.8 times the tensile strength of the conventional cable. I understand.

Therefore, according to the cable of the present invention, the sheath 1
Even if you repeatedly attach and detach the sheath 1 to the device by grasping the sheath 4,
4 will not shift or move in the length direction.

(Effects of the invention) As is clear from the above explanation, in the cable of the invention, the sheath is made difficult to move in the length direction, so it is easy to attach and detach from equipment, and the wrapped tapes do not wrinkle. It won't warp or tear.

Furthermore, it does not require any special jigs and can be manufactured with almost no changes to conventional processes.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an embodiment of the rubber/plastic insulated cable of the present invention, and FIG. 2 is a perspective view of a conventional device direct connection type cable. 3, 8... Cable core, 4, 11... Semi-conductive rubberized tape winding layer, 5, 5', 12... Metal tape winding layer, 6, 13... Holding tape winding layer,
7,14... Sheath.

Claims (1)

[Scope of utility model registration request] A short cable that grips itself and connects directly to electrical equipment in a detachable manner, with semiconductive rubberized tape wound around the cable core with the rubberized side facing outward, and a thick It consists of a single piece of metal tape with a diameter of 0.2 mm wound around it, a rubberized tape wrapped around it with the rubberized side facing outward, and a sheath coated on top of it. Features rubber and plastic insulated cables.