JP3349344B2 - Device direct connection type terminal - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION A power distribution system is generally composed of equipment, cables, and accessories. When a cable is connected to equipment, accessories are used to secure electrical and mechanical performance of a connection portion. That is, a device directly connected to the device is required. The present invention relates to a terminal directly connected to a device for connecting the above-mentioned cable to a device, and more particularly to a terminal directly connected to a device which prevents displacement of a conductor and a terminal body during terminal assembly.

[0002]

2. Description of the Related Art A terminal directly connected to a device is usually assembled as follows. (1) Compression-connect the terminal to the cable. (2) Insert the compression-connected terminal and cable conductor into the terminal body. (3) Insert the insulation tube of the terminal body into the device bushing. (4) Tighten the terminal and the conductor of the device bushing by bolts, and fit the insulating cylinder and the device bushing. (5) Attach the insulation plug to the insulation tube 8. (6) Wrap the end of the terminal body and the shield layer of the cable with tape using semiconductive tape, and then wind the tape with insulating tape from above. As described above, in the conventional terminal, after connecting the cable conductor to the terminal, the insulating cylinder is fitted with the device bushing,
The terminal and cable are treated with semi-conductive tape and waterproof with insulating tape.

[0003] In recent years, there has been a demand for more compact and multifunctional terminals than ever before.
With respect to terminals applied to panels including circuit breakers and the like of distribution facilities filled with F6 gas, further miniaturization is required in accordance with the miniaturization of the panels. In the above-mentioned compact terminal, the terminal mounting pitch is very narrow, and the terminal cannot be assembled in the same order as the above-mentioned conventional one. That is, the terminal and the cable conductor are inserted into the terminal main body, the terminal is assembled by performing a waterproofing treatment with a semiconductive tape or an insulating tape, and then the insulating cylinder is fitted to the device side bushing and the conductor is bolted.

FIGS. 4 and 5 are diagrams for explaining the procedure for assembling the terminal described above. In the figure, the terminal is assembled as follows. (1) First, as shown in FIG. 4, the conductor of the cable 3 is compression-connected to the terminal 4 and inserted into the terminal insertion portion 9 of the terminal body 1 (of FIG. 4). (2) As shown in FIG. 5, a semiconductive tape is wound around the cable shield layer side of the terminal body 1, and further, a waterproof tape is wound. (3) Next, as shown in FIG. 4, the insulating tube 8 of the terminal body 1 is fitted to the device bushing (of FIG. 4), and the terminal 4 and the conductor of the device bushing 2 are bolted by the bolts 6 with screw holes. (FIG. 4). (4) The insulating plug 5 is fitted into the insulating tube 8, the bolt 5b of the insulating plug 5 is engaged with the screw hole provided in the bolt 6 with the screw hole, and the entire insulating plug 5 is turned to insulate the insulating plug. Attached to the cylinder 8 (of FIG. 4). (5) Attach the detection cap 5 to the insulating plug 5 (FIG. 4).

[0005]

In a compact terminal, the above-mentioned assembling procedure is performed, so that a problem that has not occurred in the past occurs. That is, since the tape winding process or the like is performed before the terminal is bolted, if the time from the end of the tape winding process to the terminal connection to the device bushing, that is, the conductor connection, is long, the insulating tube 8 is displaced due to the tape winding contraction or the like. As shown in FIG. 5,
A shift occurs at the center position of the terminal 4. For this reason, there arises a problem that the terminal 4 and the device bushing 2 cannot be connected by the bolts 6 with screw holes. The present invention has been made in order to improve the above-described disadvantages of the prior art, and even if a process such as tape winding before bolting the terminal, the center position of the terminal does not shift, An object of the present invention is to provide a device directly connected to a terminal that can confirm a terminal insertion position.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention comprises an insulating cylinder formed of an insulator made of an elastic member and having a fitting surface with an equipment bushing, and a terminal connected to a cable conductor. A terminal body having a terminal insertion portion to be inserted is provided, and after inserting a terminal connected to a cable conductor into the terminal insertion portion and winding the tape, the fitting surface of the insulating cylinder is fitted to an equipment bushing, and the terminal is A terminal directly connected to a conductor of the terminal bushing and the device, a protrusion / recess is formed inside the terminal insertion portion of the terminal body, and a recess / protrusion is formed in the terminal, and the protrusion and the recess are connected. It is configured to position the terminal body and the terminal together.

[0007] In the present invention, as described above, the protrusion / recess is provided on the inside of the terminal body, and the recess / protrusion engaging with the protrusion / recess is provided on a part of the terminal to be inserted. When the terminals are correctly positioned, the convex and concave portions are engaged so that the terminal insertion position can be felt by hand. In addition, the terminal can be prevented from being displaced. Therefore,
If the projections and depressions engage, the terminal does not move until the tape winding process, and the positions of the terminal body and the terminal do not change even after a long time after the tape winding process.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a diagram showing the configuration of a device-directly connected T-type terminal according to an embodiment of the present invention. FIG. 1 shows an example of a device directly-connected 6.6 kV T-type terminal. In FIG.
1 is a terminal body, 2 is a bushing on the device side made of epoxy resin or the like, 3 is a cable, 4 is a conductor 3 of the cable 3
The terminal 5a is crimped and the insulating plug 5 is made of epoxy resin or the like. The terminal body 1 includes an inner semiconductive layer 1a, an insulating layer 1b formed of an elastic material such as EP rubber, silicon rubber, and the like, and an outer semiconductive layer 1c. It comprises an insulating tube 8 having a surface and a terminal insertion portion 9 for inserting the terminal 4 to which the cable conductor 3a is connected. A convex portion 7 is formed in the inner semiconductive layer 1a near a connection portion between the insulating tube 8 of the terminal body 1 and the terminal insertion portion 9, and a concave portion 7 engaging with the convex portion 7 is formed in the terminal 4. 'Has been formed.

The cable shielding layer side of the terminal body 1 forms a stress cone. After the cable 3 is inserted, the cable is wound around with a semiconductive tape 3b and an insulating tape 3c. Further, the ground wire 3d is drawn out of the shield layer of the cable 3. The terminal 4 is connected to the conductor 2a of the equipment bushing 2 by a bolt 6 having a screw hole at the top via a washer 6a. In addition, a bolt 5 b that engages with a screw hole provided at the top of the bolt 6 is embedded in the insulating plug 5. Then, the bolt 5b is replaced with the bolt 6
A screw-in insulating plug 5 is attached to a screw hole provided at the top of the screw.

At the top of the insulating plug 5, a conductor 5a to which a terminal for power detection is attached is embedded. An electric detection cap 5e is detachably attached to the conductor 5a, and the electric detection cap 5e is a grounding member 5 made of conductive rubber or the like.
c, it is attached to the external semiconductive layer 1c of the terminal body 1. A capacitance is formed between the conductor 5a and the conductor 5d formed integrally with the bolt 5b, and when the power detection cap 5b is removed, a voltage is generated on the conductor 5a during power application. .

FIGS. 2 and 3 show the procedure for assembling the terminal described above. The assembling of the terminal according to this embodiment will be described with reference to FIGS. The cable conductor 3a is compression-connected to the terminal 4, and is inserted into the terminal insertion portion 9 of the terminal main body 1 as shown in FIG. 2 (of FIG. 2), and the convex portion provided on the terminal main body 1 as shown in FIG. 7 is engaged with the recess 7 ′ provided in the terminal 4. Next, the cable 3 and the end of the terminal main body 1 are wound around a semiconductive tape 3b and an insulating tape 3c. Next, the insulating cylinder 8 of the terminal body 1 is fitted to the device bushing 2 (FIG. 2), and the terminal 4 is bolted to the conductor 2a of the device bushing 2 with the bolt 6 (FIG. 2). Then
The insulating plug 5 is fitted into the insulating tube 8, and the bolt 5 b embedded in the insulating plug 5 is engaged with a screw hole provided on the top of the bolt 6, and the entire insulating plug 5 is turned to remove the bolt 5 b. The screwed insulating plug 5 is attached to a screw hole provided at the top of the bolt 6.

In the present embodiment, as described above, the convex portion 7 provided on the terminal body 1 and the concave portion 7 'provided on the terminal 4 are provided.
Is engaged, the insertion position of the terminal 4 compression-connected to the terminal body 1 and the cable 3 can be confirmed. Also, even if the processing of the semiconductive tape 3b and the insulating tape 3c is performed and the time until the connection to the device bushing 2 is long, the center position of the screw 4 with the screw hole for connecting the terminal 4 to the device bushing 2a is shifted. Does not occur. When the terminal of this example was assembled, insertion was confirmed, and even if the device bushing was attached one week after the end of the tape winding process, no problem was posed.

[0013]

As described above, according to the present invention, after the terminal to which the cable conductor is connected is inserted into the terminal insertion portion of the terminal body and subjected to tape processing, the insulating cylinder of the terminal body is fitted to the equipment bushing. The terminal is connected directly to the conductor of the device bushing. In the terminal directly connected to the terminal, a convex / concave portion is formed inside the terminal insertion portion of the terminal body, and a concave / convex portion is formed in the terminal. Is engaged to position the terminal body and the terminal, so that the insertion position can be confirmed. Further, it is possible to solve the problem that the insulating cylinder is displaced due to shrinkage of the tape processing or the like, so that the terminal and the device bushing cannot be bolted.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of a T-type terminal according to one embodiment of the present invention.

FIG. 2 is a diagram showing a procedure for assembling a T-type terminal according to an embodiment of the present invention.

FIG. 3 is a view for explaining positioning by fitting of convex and concave portions in the terminal of FIG. 2;

FIG. 4 is a diagram showing a procedure for assembling a T-type terminal.

FIG. 5 is a diagram illustrating a positional shift caused by tape winding in the terminal of FIG. 4;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Terminal main body 1a Internal semiconductive layer 1b Insulating layer 1c External semiconductive layer 2 Equipment bushing 2a conductor 3 Cable 3a Cable conductor 3b Semiconductive tape 3c Insulating tape 3d Ground wire 4 Terminal 5 Insulating plug 5a Conductor 5b Bolt 5c Grounding member 5d Conductor 5e Power detection cap 6 Screw hole bolt 6a Washer 7 Convex part 7 'Concave part 8 Insulation cylinder 9 Terminal insertion part

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H02G 15/08

Claims (1)

(57) [Claims] 1. A terminal body comprising an insulating cylinder formed of an insulator made of an elastic member and having a fitting surface with an equipment bushing, and a terminal insertion portion for inserting a terminal connected to a cable conductor, After inserting the terminal to which the cable conductor is connected into the terminal insertion portion and winding the tape, the above-mentioned fitting surface of the insulating cylinder is fitted to the device bushing, and in the device directly connected type terminal connected to the terminal and the conductor of the device bushing, Forming a protrusion / recess inside the terminal insertion portion of the terminal body, forming a recess / protrusion in the terminal, engaging the protrusion and the recess, and positioning the terminal body and the terminal. Characteristic device direct connection type terminal.