JPS6320038Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to vacuum shields and disconnectors, and particularly relates to improvements in conductive parts for movable electrodes.

[Technical issues of invention]

Figure 1 shows a conventional vacuum cutter.

In FIG. 1, a vacuum valve 1 has a fixed electrode fixed to an upper conductor 3 fixed to a support insulator 2, a movable electrode connected to a lower conductor 8 fixed to a support insulator 5 via a flexible conductive part 7, The movable electrode is moved up and down by an operating lever 10 via an insulating rod 11 and an operating rod 16, thereby opening and closing the main circuit.

In addition, 4 and 9 are main circuit disconnecting parts, 12 is a base for a vacuum shield and disconnector, and 13 is a wheel for charging.

The details of the flexible conductive section 7 seen from the X direction are shown in the second section.
As shown in the figure.

In FIG. 2, 7A and 7B are two sets of U-shaped flexible conductors with a laminated structure constituting the flexible conductive part 7, and are attached to the movable electrode 14 with a mounting bolt 15 via clamps 6A and 6B coupled to each other. It is fixed with scissors.

The flexible conductive portion 7 is formed by two sets of U-shaped flexible conductors 7A and 7B.
The reason why the vacuum valve 1 is constructed in combination is that when the vacuum valve 1 is attached or detached, the work is facilitated by removing the mounting bolts 15.

However, if a short circuit current flows during energization, a large electromagnetic repulsive force proportional to the square of the current acts on the mounting bolt 15, and therefore the dimensions of the mounting bolt 15 must be made considerably large. As a result, the dimension l in FIG. 2 becomes large, which creates the problem of an increase in the overall dimensions of the vacuum and breaker.

[Purpose of invention]

In this invention, the flexible conductive part is configured as a parallel circuit of two sets of C-shaped flexible conductors, and the movable electrodes are sandwiched and tightened laterally, thereby reducing the influence of electromagnetic repulsion and tightening bolts. The purpose of the present invention is to provide a rational vacuum breaker and disconnector that can reduce the overall size.

[Summary of the idea]

In the present invention, the flexible conductive part for the movable electrode is constructed by connecting two sets of C-shaped flexible conductors laminated in an oval shape in parallel and tightening them to the movable electrode via a clamp provided inside the oval shape. This is a vacuum shield breaker designed to reduce the influence of electromagnetic repulsion applied to the tightening part when short-circuit current flows.

[Example of idea]

An embodiment of the present invention is shown in FIG.

FIG. 3 shows only the flexible conductive portion which is a feature of the present invention, and the other parts are the same as the conventional FIG. 1. Moreover, FIG. 4 is a view of FIG. 3 viewed from the X direction.

In FIG. 3, the flexible conductor connected to the movable electrode 14 is composed of two sets of C-shaped flexible conductors 17A and 17B laminated in an oval shape, and two sets of clamps 6A and 6B coupled to each other. The movable electrode 14 is sandwiched between the mounting bolts 15 and the movable electrode 14 .

When the configuration shown in FIG. 3 is used, when a short circuit current flows during energization and a large electromagnetic repulsive force acts on the mounting bolt 15, two sets of C-shaped flexible conductors 17A, 1
7B due to the short circuit current shunting to the flexible conductor 17.
A large attractive force acts between A and 17B to cancel the electromagnetic repulsion.

Therefore, the tensile force applied to the mounting bolt 15 is reduced, which allows the diameter of the mounting bolt 15 and the plate thickness of the clamp to be reduced.
Even if the mounting bolt 15 is installed inside the flexible conductors 17A, 17B, a sufficient open circuit distance can be obtained, and the l dimension in FIG. 4 can be made smaller than the l dimension in FIG. It becomes possible to reduce the total dimensions of.

Additionally, the tightening tool for the mounting bolts has also become smaller, which improves work efficiency when replacing the vacuum valve.

[Effect of idea]

As explained above, according to the present invention, the effect of electromagnetic repulsion when a short-circuit current flows is reduced by making the conductive part for the movable electrode into a structure in which two sets of C-shaped flexible conductors are tightened in parallel. This results in a vacuum chamber and disconnector whose overall dimensions can be reduced.

[Brief explanation of the drawing]

Figure 1 is a configuration diagram showing an example of a conventional vacuum shield disconnector, Figure 2 is a detailed view of the conductive part in Figure 1, and Figure 3 is an embodiment of the vacuum shield disconnector according to the present invention. A detailed view of the conductive portion, FIG. 4, is a view of FIG. 3 viewed from the X direction. 1...Vacuum valve, 6A, 6B...Clamp, 7...
Flexible conductive part, 7A, 7B...U-shaped flexible conductor, 14...
Movable electrode, 15...Mounting bolt, 16...Operation rod, 17A, 17B...C type flexible conductor.

Claims (1)

[Scope of utility model registration request] The flexible conductive part for the movable electrode is constructed by connecting two sets of C-shaped flexible conductors laminated in an oval shape in parallel and tightening them to the movable electrode via a clamp provided inside the oval. Vacuum cutter.