JPH0312199Y2 - - Google Patents

Description

[Detailed description of the invention] [1] Technical field The present invention uses a high-voltage cutout to cut off overcurrent, etc. on the primary side of a distribution transformer, and in particular attaches this high-voltage cutout to a high-voltage arm at the top of a utility pole to connect a high-voltage underline. In order to simplify and beautify the installation of poles, and to ensure safety when working on poles, the high-voltage cables connected to the primary side of the distribution transformer installed below the high-voltage armrest are connected to the insulators of the main body. The present invention relates to a high-pressure cutout which is detachably connected to the side surface of the machine in a substantially L-shape.

[2] Background technology Conventional high-voltage cutouts include, for example, a cylindrical main body insulator, an upper fixed electrode and a lower fixed electrode provided within the main body insulator, and a cutout disposed between the upper fixed electrode and the lower fixed electrode. a power supply side lead wire connected to the upper fixed electrode and fixed to the upper part of the main body insulator; and a load side outlet connected to the lower fixed electrode and fixed to the lower part of the main body insulator. It is known that the power line consists of an outgoing wire and is attached to a utility pole as shown in FIG. 1 or 2.

That is, FIG. 1 shows an example of a pole installation.A utility pole 1 supporting a high-voltage overhead distribution line is equipped with a high-voltage arm 2.
and a transformer arm 3, a high voltage insulator 5 made of a pin insulator attached to the high voltage arm 2 and supporting the high voltage distribution line 4, and a high voltage underline 6 attached to the high voltage arm 2 and connected to the high voltage distribution line 4. upper support insulator 7 that supports
, a lower support insulator 8 attached to the transformer arm 3 and supporting the high voltage underline 6; A distribution transformer 9 for supplying power is installed on the pole. The high voltage cutout 10 is attached to the transformer arm 3, and its power supply side lead wire is connected to the high voltage underline wire 6, and its load side lead wire is connected to the primary side of the distribution transformer 10, respectively. In addition, in the example of pole installation shown in FIG. 2, the high voltage insulator 5 supporting the high voltage distribution line 4 is made of a tension insulator, and the high voltage distribution line 4 supported by this tension insulator is attached to the high voltage arm 2 for high voltage distribution. Segmentation switch 11 that performs line segmentation, etc.
It is also connected to the high voltage underline 6.

In the above configuration, when an overcurrent flows to the primary side of the distribution transformer 9 due to an internal short circuit or overload of the distribution transformer 9, the fuse in the high voltage cutout 10 blows and the primary side current is cut off. , burnout of the distribution transformer 9, etc. can be prevented.

The conventional high-voltage cutout 10 is generally attached to the transformer arm 3 and connected between the high-voltage underwire 6 and the primary side of the distribution transformer 9, so the load-side outlet wire is attached to the lower part of the main body insulator. It has a structure suitable for mounting pillars as described above, such as by fixing it. However, in the case of the above-mentioned pole installation, since the high voltage draw wire 6 is provided between the high voltage arm 2 and the transformer arm 3, the high voltage draw wire 6 is not connected during pole work.
There is also a safety issue as there is a risk of coming into contact with the As a result, the mounting condition of the pillars is complicated and is not aesthetically pleasing. For this reason, a column mounting structure in which the high-voltage underline 6 is removed has been proposed, for example, as shown in FIG. 3. In other words, in the pole mounting structure shown in FIG. 3, the high voltage cable 1 is used instead of the high voltage underline 6
2, the high voltage cable 12 is fixed along the utility pole 1 between the high voltage arm 2 and the transformer arm 3, and the upper end of the high voltage cable 12 is connected to the high voltage distribution line 4 via the terminal processing section. At the same time, the lower end is routed around and connected to the power supply side lead wire of the high voltage cutout 10. However, for this type of pillared structure,
Although the safety of pole work is improved, the distance that the high-voltage cable 12 must be routed becomes longer, the wiring condition is still complicated, and the aesthetic appearance may be impaired.

Therefore, the applicants of the present application removed the transformer arm 3, attached the high voltage cutout 10 to the high voltage arm 2, and installed the high voltage cutout 10 and the distribution transformer 9 along the utility pole 1 in a high voltage cable. We proposed a column-mounted structure that connects the two. However, in the conventional high voltage cutout 10, the load side lead wire is fixedly provided at the bottom of the main body insulator, so when this is attached to the high voltage arm 2,
There are restrictions on ensuring the separation between the load-side lead wire and the high-voltage arm, and the connection to the primary high-voltage cable of the distribution transformer 9 must go through a terminal processing section. The pillar is complicated and high pressure armrest 2
The structure was not suitable for installation.

[3] Purpose and structure of the invention The present invention was created in view of the above, and aims to eliminate the need for high-voltage draw wires, simplify and beautify the installation of poles, and make it easier to ensure safety when working on poles. Therefore, the high-voltage cable connected to the primary side of the distribution transformer installed below the high-voltage cross arm should be connected to the side of the main insulator at a position approximately midway between the upper fixed electrode and the lower fixed electrode provided inside the main insulator. It can be detachably connected via a plug electrode to a receptacle electrode in a cylindrical part formed protruding from the top.
In addition, the present invention provides a high-voltage cutout configured to fix the main body insulator to the high-voltage arm by means of hanging frames hung on both sides of the cylindrical portion.

[4] Examples The high-pressure cutout according to the present invention will be described in detail below.

FIG. 4 shows an embodiment of the present invention, and this high-pressure cutout 100 includes a main body insulator 101 having a cylindrical protrusion 101a substantially perpendicular to the axial direction at the substantially central part of the cylindrical insulator; An upper fixed electrode 102 provided above inside the insulator 101, a lower fixed electrode 103 provided below inside the main body insulator 101 and fixed by a fixed electrode mounting base 102, and an upper fixed electrode 102 and a lower fixed electrode 103. An arc extinguishing chamber 104 formed of a cylindrical member disposed in between, an upper electrode 106 having an arc extinguishing rod 105, and removably fitted to the upper fixed electrode 102, and a lower fixed electrode 103.
A fuse tube 108 is provided with a lower electrode 107 that is fitted in contact with the lower electrode 107, a power supply side lead wire 109 connected to the upper fixed electrode 102 and adhesively fixed to the upper part of the main body insulator 101, and housed in the cylindrical protrusion 101a. A receptacle 110 for plug clamping is formed by winding a spring 110b around the outer periphery of a clamping member 110a, a lead-out conductor 111 connects the fixed electrode mounting base 102 and the receptacle 110, and an upper end fixed in the lower end opening of the main body insulator 101. a guide member 112 whose inner circumferential surface closely contacts the outer circumferential surface of the fuse tube 108 and closes the lower end opening of the main body insulator 101;
A sealing lid 113 that closes the lower end opening of the housing, and a string 1 that freely fixes the sealing lid 113 to the main body insulator 101.
14, a high-voltage cable 120 connected to the primary side of a distribution transformer, a substantially L-shaped insulating tube 122 sealed with a waterproof coating 121 on the outer periphery of the terminal portion of the high-voltage cable 120, and an insulating tube 122. The high-voltage cable 120 is fixed in the tip opening of the
a plug 124 connected to a conductor, and an insulating tube 12
a waterproof band 125 that tightens the outer periphery of the tip of the insulating tube when the inner circumferential surface of the tip of 2 and the outer circumferential surface of the cylindrical protrusion 101a are fitted, and a mounting bracket 130 for supporting and fixing the main insulator 101 to a high-voltage arm at the top of the utility pole. It is composed of. Here, as shown in FIG. 5, the mounting fittings 130 include a base 130a fixed to a high-pressure cross arm with bolts and nuts, etc., and a base 130a fixed to the base 130a with bolts and nuts etc. from the outer periphery of the main body insulator 101. It is composed of a retaining frame 130b that holds the main insulator 101 by enclosing the main insulator 101 in a substantially orthogonal direction. With this configuration, the work of attaching the main body insulator 101 to the high-pressure cross arm can be easily performed.

In the above configuration, the high voltage cutout 100
In order to attach the main body insulator 101 to the utility pole 1, for example, as shown in FIG. 6, FIG. 7, and FIG. to be fixed. Next, the main body insulator 10
1 is connected to the high voltage distribution line 4. Furthermore, an insulating tube 12 is provided at one end.
2, a plug 124, etc. are attached in advance, and the other end is connected to the primary side of the distribution transformer 9 fixed to a transformer stand or the like below the high-voltage arm 2. etc., insert the insulating tube 122 into the outer peripheral surface of the cylindrical protrusion of the main insulator 101, and insert the plug 124 into the receptacle 1.
The receptacle 110 is inserted into the clamping member 110a against the contraction force of the spring 110b at 10.
Hold it in place. After that, the outer periphery of the tip of the insulating tube 122 is tightened with a prevention band 125 to tighten the cylindrical protrusion 101.
Finish the work by sticking to a.

When the plug 124 is inserted into the receptacle 110 in this way, the power supply side outlet wire 109 connected to the high voltage distribution line 4 is finally connected to the outlet conductor 111, the receptacle 110, and the plug by inserting the fuse tube 108. 124 and the high-voltage cable 120, etc., so if an overcurrent flows to the primary side of the distribution transformer 9, the fuse in the fuse tube 108 will be connected to the arc extinguishing chamber 104. fuses and cuts off the primary current, which causes the distribution transformer 9
The primary side of is protected. Here, when the fuse blows, the pressure inside the main body insulator 101 increases, and the sealing lid 1
13 is opened and pressure is released from this portion, thereby preventing damage to the high-pressure cutout 100 due to an increase in internal pressure. Moreover, a plug 124 is attached to the terminal part of the high voltage cable 120, and the receptacle 1 that holds the plug 124 is installed.
10 is fixed within the cylindrical protrusion 101a of the main insulator 101 so that both can be attached and detached, thereby facilitating the connection work between the high voltage cutout 100 and the high voltage cable 120 connected to the primary side of the distribution transformer 9. In addition, when inserting the plug 124 into the receptacle 110, the plug 124 can be rotated within the clamping member 110a of the receptacle 110 to freely change its installation direction.
The degree of freedom in the mounting position of the 0 is increased, which makes wiring work easier and more accurate. Further, a cylindrical protrusion 101 that accommodates the receptacle 110
a is provided approximately at the center of the main body insulator 101, and the installation interval between the sealing lid 113 inserted into the lower end opening of the main body insulator 101 and the receptacle 110 is increased, so that the insulation between the ground of the high voltage cutout is disturbed. Moreover, when the sealing lid 113 is opened and the pressure is released due to the increase in internal pressure when the fuse blows,
Adverse effects such as mechanical shock and heating on the receptor 110 can be prevented. Moreover, since the plug 124 inserted into this receptacle 110 is attached to the end portion of the high voltage cable 120 in a substantially perpendicular direction, when the plug 124 is inserted into the receptacle 110, the high voltage cable 120 is connected to the main body insulator 101.
It is connected in a substantially L-shape to the side surface of. Therefore, when the main insulator 101 is attached to the high-voltage arm 2 and connected to the primary side of the distribution transformer 9 fixed below the high-voltage arm 2 by a transformer stand or the like, using the high-voltage cable 120, the high-voltage cable 120 It becomes easy to carry out the lowering work along the utility pole 1, and therefore, it is possible to omit high-voltage underwires, low-voltage arms, etc., which simplifies and beautifies the pole installation and improves work efficiency. Not only can work costs be reduced, but the safety of pole work can be improved by eliminating the need for high-voltage underlines.

In the above embodiment, the receptacle 110 and the plug 124 only need to have a removable structure, and therefore various shapes other than those shown in FIG. 4 can be used.

[5] Effects of the invention As explained above, according to the high voltage cutout of the invention, the high voltage cable on the load side connected to the primary side of the distribution transformer can be connected to the upper fixed electrode provided inside the main body insulator. The receptacle electrode in the cylindrical part, which is formed protruding from the side surface of the main insulator at a position approximately midway between the lower fixed electrode and the lower fixed electrode, can be removably connected to it via a plug electrode, and can be hung on both sides of the cylindrical part. Since the main body insulator is fixed to the high-voltage cross arm using the hanging frame, the degree of freedom in the installation direction of the high-voltage cable is increased without disturbing the insulation of the high-voltage cutout, and the lowering work is facilitated. By attaching the high-voltage cut-out of the lever to the high-pressure arm, high-voltage draw wires, low-pressure arms, etc. can be omitted, simplifying and beautifying the pole installation, and improving safety and work efficiency when working on the pole. I can do it.

[Brief explanation of the drawing]

Figures 1, 2 and 3 are general pillar mounting diagrams,
Fig. 4 is a vertical cross-sectional view of a high-pressure cutout according to an embodiment of the present invention, Fig. 5 is a perspective view of the mounting bracket in Fig. 4, and Figs. FIG. 8 is a partial side view of the pillar mounted state, and FIG. 8 is a schematic plan view of FIG. 7. Explanation of symbols, 1...Electric pole, 2...High voltage arm, 3
...Low voltage armband, 4...High voltage distribution line, 6...High voltage underline, 9...Distribution transformer, 100...High voltage cutout, 101...Main insulator, 101a...Cylindrical protrusion, 102... ...Top fixed electrode, 103...
Lower fixed electrode, 106... Upper electrode, 107...
Lower electrode, 108...Fuse tube, 110...Receipt, 120...High voltage cable, 122...Insulating tube, 124...Plug.

Claims (1)

[Scope of Claim for Utility Model Registration] A cylindrical body insulator that is removably fixed to a high-voltage arm at the top of a utility pole with a mounting bracket, an upper fixed electrode and a lower fixed electrode provided within the body insulator, and the upper part. A fuse tube connected to the fixed electrode and the lower fixed electrode, a power supply side lead wire connected to the upper fixed electrode, fixed to the upper part of the main body insulator, and connected to a high-voltage electric wire, and connected to the lower fixed electrode. a load-side high-voltage cable connected to the primary side of a distribution transformer installed below the high-voltage arm; extending a cylindrical protrusion, and fixing a receptor connected to the lower fixed electrode via a lead conductor within the cylindrical protrusion;
A plug is fixed to an end of a high-voltage cable on the load side connected to the primary side of the distribution transformer, and the plug is detachably inserted into the receptacle, and the mounting fitting is attached to the tube. A high-voltage cutout characterized in that the cut-out is fixed to the high-voltage arm by means of a hanging frame that holds the main body insulator in substantially orthogonal directions on both sides of the shaped protrusion.