JPH10162696A - Disconnecting switch - Google Patents

Abstract

PROBLEM TO BE SOLVED: To cope with a large current by providing two contacts having large and small diameters on each terminal board, arranging two pairs of blades in two stages in the blade inserting direction, and bringing them into contact with the large/small-diameter contacts. SOLUTION: When a hinge shaft 5 is turned, blades 7, 8 can be inserted to or removed from contacts A, B. When a lever 16 is lifted, a rod 17 is lifted, and a forked lever 18 is rotated CW. A link 19 is insulated by an insulator G3 at the center section, and it is towed to the right by the turn of the lever 18. A link 20 is fixed to the hinge shaft 5 at one end and locked on the link 19 end at the other end, and one side of the lever 18 and the link 20 make a parallelogram motion. When the link 19 is towed to the right, the hinge shaft 5 is turn, and the blade 7 is inserted. Curved arms 9 are not integrated into a single arm, they are independently fixed to the hinge shaft 5 for each set, and the inserting actions of the blades 7, 8 are secured.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disconnector used for disconnecting a non-conducting circuit, and an object of the present invention is to minimize an increase in the volume of the device with respect to an increase in a used current.

[0002]

The case of an electric railway will be described. When a pant of a vehicle in a section descends in a certain section insulated from others by the section insulator, the section is de-energized. The disconnector is used in this state, for example, when switching the bus. As the disconnecting switch, one provided with one contact and a pair of blades is generally used in a fixed form. Since the blade is always charged and the blade is heavily inserted and disconnected, it has conventionally been an issue to make the blade lighter. Recently, new challenges have been added to this. The current, which was about 2000 A in the past, has increased from 3000 A to 4000 A, and in some cases, a current withstanding up to about 5000 A has been required. In the past, multiple sets of existing single contactors were arranged in parallel, and the blades were operated simultaneously to meet the demand. However, since the disconnectors handle high pressure, the capacity of the device is large. If this is made into a double row, it will become huge and obstruct the installation space. This problem is particularly great on subway routes. In order to minimize the increase in the volume of the disconnector and to be able to handle a large current, a qualitative change in its structure has been required.

[0003]

Heretofore, one contact has been planted on a pair of terminal boards, and only one pair of blades sandwiches the contacts. In the present invention, two large and small diameter contacts are planted on each terminal plate, and two pairs of blades are arranged. Each blade is arranged in two stages in the blade insertion direction so as to contact each large and small diameter contact. As a result, the number of current paths is doubled, so that it is possible to cope with a large current that has never existed. The frictional resistance of the blade is reduced by the two-stage injection. When two sets of this structure are arranged in parallel, a current of about 5000 A can be handled.

[0004]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment will be described with reference to the drawings.
The base 1 has upper and lower terminal boards 2 via insulators G1 and G2.
3 is fixed. A pair of contacts A and B having a large diameter and a small diameter are implanted in the upper and lower terminal plates so as to face each other in the vertical direction. Contact A has a small diameter and long, and contact B has a large diameter and short. A bearing 4 is provided on the terminal plate 3, and a hinge shaft 5 is rotatably supported on the terminal plate 3. A rectangular substrate 6 is supported on the hinge shaft 5, and long and short blades 7, 8 are integrated as an extension thereof. The blades 7 and 8 can hold large and small diameter contacts A and B, respectively. The lower end of the bending arm 9 is fixed to the hinge shaft 5, the other end is bent, and the other end is connected to the center of the blades 7, 8 with the bolt 1.
Locked at 0. FIG. 2 shows a structure for fastening the contact A by a pair of blades 7,7. A holding plate 11 is applied to the blades 7 and 7 outside, and a tube spacer 12 is inserted between both blades, and a spring 1 is provided outside one of the holding plates.
3 and a spring cover 14 are attached, and a bolt 15 penetrates them. By tightening the bolt 15, a high contact pressure is obtained. Contact B by blades 8, 8
The structure of the contact B is not different from that described above, but since the contact B is larger in diameter than the contact A, the distance between the opposing blades is increased by adjusting the length of the spacer 12. Therefore, the electric circuit A-
7-A and B-8-B do not come into contact. In any case, the contact area between the blade and the contact is silver-plated so that the contact resistance does not change depending on the surrounding conditions, but this point is the same as in the past. With the above configuration, when the hinge shaft is rotated, the blades 7 and 8 can be inserted into and removed from the contacts A and B. FIG. 3 shows a mechanism for rotating the hinge shaft 5. In this figure, the manual lever 16 is almost horizontal and the blade 7
Is extracted from the contact A. Now, when the lever 16 is lifted, the rod 17 is raised, and the bifurcated lever 18 is rotated clockwise. Although the center of the link 19 is insulated by the insulator G3, the link 19 is pulled to the right by the rotation of the forked lever. The link 20 has one end fixed to the hinge shaft 5 and the other end connected to the link 19.
Locked to the end. One side of the bifurcated lever 18 and the link 20 make a parallelogram movement. Therefore link 19
Of the hinge shaft 5 is rotated by the right
It becomes the input of. FIG. 4 shows two sets of disconnectors configured as described above arranged in parallel, and can be operated simultaneously by a common hinge shaft 5. The curved arms 9 are not combined into one, but are fixed to the hinge shaft 5 independently for each set.
This is to ensure the blade closing operation.

[0005]

As described above, according to the present invention, the blade is divided into two stages in the loading direction, and the blades are brought into contact with the other corresponding contacts A and B, respectively. It is possible to cope with three times as much current. 2 of this
When the sets are arranged in parallel, it can be used for a current of about 5000A. In the above description, the contacts are described as two of A and B. If necessary, three of A, B and C are provided on the same line, and three pairs of blades are correspondingly provided. It is obvious that a larger current can be handled by changing to.

[Brief description of the drawings]

FIG. 1 is a side view of the present invention.

FIG. 2 is an explanatory view of fastening a blade 7 to a contact A.

FIG. 3 is an explanatory diagram of a blade input mechanism.

FIG. 4 is a perspective view of a two-set parallel type.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Base 2, 3 Terminal board 4 Bearing 5 Hinge shaft 6 Substrate 7, 8 Blade 9 Curved arm 10 Bolt 11 Holding plate 12 Spacer 13 Spring 14 Spring cover 15 Bolt 16 Lever 17 Rod 18 Bifurcated lever 19, 20 Link A, B Contact Child G1, G2, G3 Insulator

Claims (2)

[Claims] 1. A pair of terminal plates in which a pair of large and small diameter contacts A and B having different diameters and lengths, which are vertically arranged at predetermined intervals, are fixed vertically, and a lower terminal plate. Contacts A and B extended and fixed to a hinge shaft rotatably supported by the provided bearing and a pair of substrates fixed to the hinge shaft at right angles to the axis.
A pair of blades each capable of holding a pair of blades, and a clamping device capable of pressing each pair of blades facing each other at regular intervals via a pressing plate; A disconnector comprising: a curved arm supporting a penetrating bolt; and a link device capable of rotating a hinge shaft by lever operation below the terminal plate. 2. A double-type disconnector comprising a plurality of sets of the disconnectors according to claim 1 arranged in parallel, a hinge axis being extended and shared by both, and each curved arm being fixed thereto.