JPH0424751Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The invention improves the durability of the cable connected to the overhead insulated wire side of the high-voltage cutout, and
This invention relates to a compact high-voltage cutout and cable connection.

[Background technology]

As a connection between high-voltage cutouts and cables,
For example, a cable conductor and a high-voltage cutout fixed electrode are connected through an opening provided at the upper end of a high-voltage cutout insulator, and an insulator and a shielding layer are molded from the upper part of the insulator to the cable insulator, and a shielding layer is formed by molding. It has been proposed that the layer is connected to a cable shielding layer, and that this shielding layer is grounded by a support fitting that supports the insulator at its center.

According to this connection portion between the high voltage cutout and the cable, since the high voltage cutout and the overhead insulated wire are connected by the cable, it is possible to improve the safety of work around the pole installation.

[Problem that the invention attempts to solve]

However, according to the connection between the high voltage cutout and the cable, since the cable is connected to the high voltage cutout while hanging from the overhead insulated wire, vibration and bending occur due to shaking, etc., especially at the bending part. The cable shielding layer may be destroyed. Furthermore, since the insulator and shielding layer are molded from the upper part of the insulator to the cable, the diameter of that part becomes large, resulting in an increase in size.

[Means for solving problems]

This invention was fabricated in view of the above, and in order to improve the durability and miniaturize the cable,
A high-voltage cutout and cable in which the cable is supported near the connection part by a mounting bracket, and the cable shielding layer is grounded by the mounting bracket or through a thin shielding layer formed on the upper surface of the insulator. It provides a connection section for

〔Example〕

Hereinafter, the connection between the high voltage cutout and the cable according to the present invention will be described in detail.

FIG. 1 shows an embodiment of the present invention, in which a cable 1
0, a high-pressure cutout 20, and a support portion 30. High voltage cutout 20 is insulator 2
The main body is a fuse tube 21 housed inside the fuse tube 2, and the fuse tube 21 is electrically connected to a fixed contact 24 via a movable electrode 23. Movable electrode 2
A movable arc-extinguishing cylinder 25a is provided on the inner circumference of 3, and a fixed arc-extinguishing cylinder 25b is arranged on the outside thereof. The fixed contact 24 is connected to a flexible conductor 27 by an insulating bolt 26, and the flexible conductor 27 is connected to the connecting terminal 12 via a tightening screw member 11. A packing 28 for sealing the upper part of the insulator 22 is compressed by a washer 29 below the connection terminal 12, and the other end of the connection terminal 12 is connected to the cable 1.
0 conductor 13 is compressed. The cable 10 has a sheath 14 and an insulator 15 stripped in stages,
A ground line 17 is connected to a shield layer 16 on the insulator 15 . Cable insulator 1 from the top of insulator 22
A rubber molded insulator 18 of the same size as the insulator 22 is provided over 5, and a rubber molded semiconductive layer 19 is formed from the upper part of the molded insulator 18 to the sheath 14. This rubber molded semiconductive layer 19 is protected by a cover 40 of a heat-shrinkable tube, and a tightening band 3 (described later) is placed on top of the cover 40.
It is tightened by 1. On the other hand, the support part 30
has a mounting bracket 33 fixed to the armrest 32, one end of the mounting bracket 33 supports the cable 10 by a tightening band 31 provided on the cable fixing member 34, and the other end of the mounting bracket 33 supports the high-pressure cutout 20 by a cutout fixing member 35 (in the above description, explanation of obvious parts of the high-pressure cutout 20 has been omitted).

According to the connection section between the cable and the high voltage cutout described above, since the cable 10 is supported by the cable fixing member 34 fixed to the mounting bracket 33 via the tightening band 31, the cable 10
can reliably prevent it from shaking. Further, the shielding layer 16 of the cable 10 is reliably covered by a rubber molded semiconductive layer 19, and a grounding wire 17 extending through that portion is fixed to the cable fixing member 34 with a screw 17a. Therefore, it can be grounded reliably. Furthermore, since the connection between the cable 10 and the high voltage cutout 20 is protected by a rubber molded insulator 18 with the same size and diameter as the insulator 22 and a rubber molded semiconductive layer 19 with a smaller diameter, the shape can be reduced. can be achieved.

FIG. 2 shows a second embodiment of the present invention, in which the ground wire 17 of FIG.
It extends as 19a to the fixed part of the cutout fixing member 35, and is intended to ground the shielding layer 16 of the cable 10 via the cutout fixing member 35. Note that the semiconductive layer 19a may be integrally formed on the insulator 22 by molding, or may be adhered with an adhesive.

Figures 3A and 3B show the embodiments of the present invention shown in Figures 3 and 4. This embodiment has a special fixing fitting 38 which is fixed to the cross arm 32 together with the cutout fixing member 35, and the fixing fitting 38 has a clamp 39 at its tip for supporting the cable 10. The embodiments shown in FIGS. 3A and 3B differ only in the shape of the bonding surfaces A and B of the insulator 22 and the rubber mold insulator 18, and other parts are common. Also,
The same reference numerals are used for parts common to the embodiments of FIGS. 1 and 2, and therefore, redundant explanations are omitted.

Furthermore, in the first to fourth embodiments, if pleats are formed on the outer periphery of the rubber molded insulator and part of the outer periphery of the insulator, there will be sufficient creepage distance even if slight peeling occurs on the bonded surfaces of the two. It does not reduce electrical reliability.

[Effect of idea]

As explained above, according to the cable and high-voltage cutout connection part of the present invention, the cable is supported near the connection part by the mounting bracket, and the cable shielding layer is thinly formed by the mounting bracket or on the upper surface of the insulator. Since the cable is grounded through the formed shielding layer, the durability of the cable can be improved and the cable can be made smaller.

[Brief explanation of drawings]

FIGS. 1, 2, and 3 A and 3 are cross-sectional views showing first to fourth embodiments of the present invention. Explanation of symbols, 10...Cable, 16...Cable shielding layer, 17...Grounding wire, 19...Rubber mold semiconductive layer, 19a...Semiconductive layer, 32...Cable arm, 33...Mounting bracket, 34, 35...Fixing metal fittings.

Claims (1)

[Scope of Claim for Utility Model Registration] At the connection between a cable connected to an overhead power line and a high voltage cutout placed on the power supply side of power distribution equipment to protect the power distribution equipment, the power supply side end of the insulator of the high voltage cutout , the outer periphery of the connection between the power supply side terminal of the high voltage cutout and the conductor of the cable, and the outer periphery of the insulator exposed by stripping the cable from the connection with the conductor, and the high voltage cutout a molded insulator having an outer diameter that is approximately the same as that of the insulator; and a molded insulator having a smaller outer diameter than the molded insulator, which covers the shielding layer exposed by stripping the steps of the cable, and also covers the power supply side of the molded insulator. a molded shield formed from an end to the sheath of the cable; a cable fixing part that fixes the sheath of the cable at a position proximate to the molded shield; and a high-voltage cutout that fixes the insulator of the high-voltage cutout approximately in the center. a fixing means comprising a fixing part that fixes the cable fixing part at the upper part, fixes the high voltage cutout fixing part at the lower part, and fixes the high voltage cutout fixing part at the lower part and commonly fixes the cable fixing part to the arm arm; A connection portion between a cable and a high voltage cutout, characterized in that the high voltage cutout fixing portion has a configuration having an axis common to the axis of the cable when the cable assumes a vertical position.