JPH0717227Y2 - Cable termination connection with bushing for power supply - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a cable terminating end portion with a bushing for drawing out a power source, and in particular, equipment directly connected to underground power distribution equipment such as switches and disconnectors. Direct connection type cable termination connection part.

[Conventional technology]

An underground power distribution device, for example, a switch, is connected to an underground power distribution cable via a cable terminating connection part to cooperate with other devices, for example, a disconnector, a transformer, etc. to connect an underground power distribution line. I am configuring.

The general structure of a switch is: an electrode section (comprising a movable electrode and a fixed electrode) that opens and closes a load, a mechanism section that opens and closes the electrode section, a control section that controls the operation of the mechanism section, and a control section. A power supply unit for supplying power to the unit and the like is provided. The conductor connected to the electrode portion is drawn out of the switch through the bushing, and the underground distribution cable is connected to this conductor. In addition, the power supply unit is configured to receive the line voltage by the power supply cable connected to the outside of the switch via the bushing and the conductor branched inside the switch, and the line voltage is supplied to the specified voltage by the transformer. After the voltage is reduced, the power is supplied to the control unit and the like. The cable terminating end connected to the bushing conductor is a compression terminal that is compression-connected to the cable conductor, a terminating end internal semiconductive layer that is applied from the cable insulator to the compression terminal, and is fitted with the switch bushing. The end connecting part insulator which has an opening at the end and which is in close contact with the cable insulating part toward the other end, and the end of the compression terminal provided so as to cover the end connecting part insulator from the cable outer semiconductive layer The plug terminal is located in the supply fitting opening by screwing. The inner semi-conducting layer, the insulator, and the outer semi-conducting layer of the terminal connection portion are integrally molded, and are hereinafter referred to as an insulating tube.

In the above configuration, when the fitting opening of the insulating cylinder is fitted into the switch bushing, the plug terminal of the terminal connection part fits with the tulip contact provided in the switch bushing, and the electrode inside the switch Section and the underground distribution cable are electrically connected. Connection to equipment other than the switch, such as a disconnector, can be performed in the same manner.

[Problems to be solved by the device]

However, according to the conventional switch, since the power source of the control unit and the like is pulled out to the outside via the bushing for pulling out the power source,
The configuration is complicated, the shape is large, and the cost is increased. Some switches have a bushing for taking out an emergency power source, but similar problems occur, and the same can be said for devices other than the switch.

Therefore, an object of the present invention is to provide a cable termination connection portion with a bushing for power supply which can take out various power supply circuits or emergency power supply without providing a power supply takeout bushing for devices such as switches and disconnectors. That is.

[Means for Solving the Problems]

In order to achieve the above object, the present invention is for connecting a cable conductor to a plug for fitting with a contact of a device bushing and for pulling out a power supply for fitting with a conductor of a cable with a bushing for supplying power to the outside. A connection terminal that has contacts in a substantially orthogonal arrangement and a connection from the connection terminal to the end of the cable sheath. The fitting opening at the end of the power supply cable is fitted to cover the power supply contactor. Provided is a cable termination connecting portion with a bushing for power supply, which is configured by an insulating cylinder that has a fitting opening portion that fits into a bushing portion for equipment and a bushing for equipment To do.

[Action]

When the fitting opening formed in the insulating tube of the cable terminating portion is fitted to an electric device, for example, a bushing of a switch, a plug projecting into the fitting opening is provided in the bushing of the switch. For example, it is inserted into a tulip type contactor. As a result, the electrode part in the switch and the cable conductor are electrically contacted. Here, when the electrode part of the switch is turned on, that is, when the movable electrode is put into the fixed electrode, the cable is activated. At this time, if the power supply lead-out cable is connected to the power supply lead-out bushing at the cable end portion, power can be supplied outside the switch through the switch and the cable end connection portion.

〔Example〕

Hereinafter, the cable terminating connection portion with a bushing for power supply of the present invention will be described in detail.

FIG. 1 shows an embodiment of the present invention. At the end of the cable, the cable conductor 12A, the cable insulator 12B (the cable inner semiconductive layer is not shown), the cable outer semiconductive layer 12
C and the sheath 12D are sequentially peeled off. The connection terminal 9 is fixed to the cable conductor 12A by the compression of the compression portion 9A, the plug 7 is screwed into the central portion 9B of the connection terminal 9, and the power supply lead-out portion 9C is extended to the other end. Has been. A power-drawing contactor 13 having an elastic gripping force is fixed to the power-drawing portion 9C, and the power-drawing portion 9C is provided so as to have a direction orthogonal to the plug 7 described above. A molded inner semiconductive layer 2 is provided from the end of the cable insulator 12B to the connection terminal 9 and the power drawing contact 13, and further covers the base of the plug 7, and the cable insulator 12 and the mold. A contactor for covering the molding inner semiconductive layer 2 and having a fitting opening 3A outside the plug 7 and for drawing out a power source.
A molded insulator 3 in which a cable 11 with a bush for power supply is formed is provided at a portion 13. Further, a molding external semi-conductive member 4 is provided so as to cover the entire molding insulating body 3 except the power-supplying bushing 11.
One end thereof is electrically connected to the cable outer semiconductive layer 12C. A waterproof tube 6 is provided from the close contact portion between the cable outer semiconductive layer 12C and the molded outer semiconductive layer 4 to the end of the cable sheath 12D. The molding external semiconductive layer 4 constitutes an insulating cylinder 10, and a device mounting flange 8 is fixed to the outer circumference of one end (the side where the opening 3A is provided) of the insulating cylinder 10.

In FIG. 2, when the fitting opening 3A of the insulating cylinder 10 is fitted into the bushing 14 of the switch 16, the plug 7 at the cable end connection portion and the tulip-type contact 17 inside the bushing 14 of the switch 16 are inserted. It is electrically connected. After this, the flange 8 is fixed to the switch 16 with bolts or the like, and the work is completed. The power supply withdrawing bushing 11 of the insulating cylinder 10 is connected with the terminal connection portion 15 of the power supply withdrawing bushing cable 18 as necessary. On the other hand, when the power supply cable 18 is not connected, an insulating lid may be provided.

Here, when the cable is located on the load side of the switch, when the electrode part of the switch 16 is turned on, power distribution service is enabled via the cable 12 and power is supplied via the power drawing cable 18. can do. The power supply can be used as a power supply for controlling the switch 16 or another emergency power supply.
When the power source for controlling the switch 16 is used, only the first closing operation is performed manually, and after the power is supplied from the cable 18 for pulling out the power source, the automatic control of closing and opening becomes possible. Also, if the cable is located on the power supply side of the switch, turning on the power supply side switch at the opposite end of the cable without turning on the electrode part of the switch 16 will bring the cable into a live state, Power can be supplied via the cable 18 for pulling out. Therefore, by using the termination connection part of the present invention for the connection part of the cable located on the power supply side,
16 automatic controls can be performed more easily.

For the above cable terminating end, the insulating tube 10 is molded, and the cable conductor 12A is inserted into the insertion hole of the insulating tube 10 and the contact 1 for pulling out the power
It is manufactured by passing the cable 12 to which the connection terminal 9 fixed to 3 is compression connected and then screwing the plug 7 into the screw hole of the connection terminal 9 from the fitting opening 3A.

However, the manufacturing method is not limited to this, and after the connection terminal 12 to which the power supply contactor 13 and the plug 7 are fixed is compression-connected to the cable conductor 12A, the insulating cylinder 10 is integrally molded on the outer periphery thereof. May be manufactured.

[Effect of device]

As described above, according to the cable terminating end portion with the bushing for pulling out the power supply of the present invention, it is not necessary to take out the power supply from the inside of the electric device such as the switch, so that the structure of the electric device can be simplified, downsized and the cost can be reduced. Can be achieved. In addition, since it is only necessary to extend a part of the connection terminal and attach the contact for power supply and mold the bushing on the outer periphery thereof, it is not necessary to enlarge the shape of the portion of the insulating cylinder. As a result, it can be easily used not only as a power source for controlling electrical equipment but also as an emergency power source for bypass construction, for example.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an embodiment of the present invention, and FIG. 2 is an explanatory view showing a state in which a cable end connecting portion with a bushing for extracting power of the present invention is connected to a switch. Explanation of symbols 2 …… Internal semiconductive layer 3 …… Insulator, 3A …… Mating opening 4 …… External semiconductive layer, 6 …… Waterproof tube 7 …… Plug, 8 …… Mounting flange 9 …… Connection terminal (compressed), 9A ...... compression part 9B ...... central part, 9C ...... power supply extraction part 10 ...... insulation tube 11 ...... power supply extraction bushing 12 ...... cable 12A ...... cable conductor 12B ...... cable insulation 12C …… Cable outer semi-conductive layer 12D …… Sheath 13 …… Power draw contact 14 …… Switch bushing 15 …… Power draw cable terminating connection 16 …… Switch 17 …… Switch bushing contact 18… … Cable for power supply

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shogo Hasegawa 1 20-20 Kitakanyama, Otaka-cho, Midori-ku, Nagoya-shi, Aichi Chubu Electric Power Co., Inc. Electric Power Technology Research Institute (72) Creator Takao Kumazawa Midori, Aichi 1-20, Kitakanyama, Otaka-machi, Chuo Electric Power Research Laboratory, Chubu Electric Power Co., Inc. (72) Creator: Kobayashi, 5-1-1 Hidaka-cho, Hitachi, Ibaraki Hitachi Cable Co., Ltd., Hidaka Plant (72) Inventor Sachio Tazawa 5-1-1 Hidaka-cho, Hitachi, Hitachi, Ibaraki Hitachi Cable Co., Ltd. Hidaka Plant (72) Inventor Kunio Mitsuguchi, Inouyama, Aichi Pref. 1 Kogami Needle Energy Support Co., Ltd. (72) Inventor, Tetsuya Hasegawa, Inouyama City, Aichi Prefecture, 1st upper small needle, Energy Support Co., Ltd. (72) Takashi Kaneko 35, Fukama, Nagagusa Town, Obu City, Aichi Prefecture Address Japan High Voltage Electric Co., Ltd., Technical Research Laboratory (56) References: Kaikaihei 2-49320 (JP, U)

Claims (1)

[Scope of utility model registration request] 1. A cable terminating end that is electrically connected to the underground power distribution device 16 by being fitted into a device bushing 14 of the underground power distribution device 16 such as a switch and a disconnector, and connected to the cable conductor 12A. Bushing 14 for the device
A connection terminal 9 having a plug 7 that fits with the contact 17 of the above and a contact 13 for drawing power supply that fits with a conductor of a cable 18 for drawing power supply that supplies power to the outside, and the connection terminal 9 to the cable sheath 12D end, and a fitting opening at the end of the power supply cable 18
Fitting opening 3A in which 15 is fitted and fitted into the power drawing bushing portion 11 and the device bushing 14 which cover the power drawing contact 13 and the plug 7 is positioned so as to project inward. 1. A cable termination connecting portion with a bushing for extracting power, which is composed of an insulating cylinder 10 having a substantially orthogonal arrangement relationship.