JPH069412Y2 - Disconnector - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a disconnector with a grounding device.

[Conventional technology]

Normally, in a disconnector, which is one of the cubicle storage devices, a power supply side and a load side before and after the disconnection are separated by a partition wall or the like for safety and prevention of accident ripple.

By the way, at the time of maintenance and inspection in the cubicle,
Ensuring safety is extremely important and for this reason
When performing work such as maintenance and inspection with the disconnector turned off, a grounding device for grounding the load side is provided integrally with the disconnector.

As a conventional disconnector with a grounding device, for example, there is one shown in FIG.
A disconnector housing space is provided between a) and (1b), and the disconnector base (2) is fixed to one partition wall (1a), and the disconnector frame (3) integrated with the base (2) is provided. It is used as a partition that separates the disconnector storage space from the upper power supply side chamber (4) and the lower load side chamber (5), and this frame (3) has both chambers (4) and (5).
A through bushing (6) is provided for electrical connection therebetween.

The through bushing (6) has a structure as shown in FIG. 5, and a cylindrical through conductor is provided in the insulating bushing body (7).
(8) is internally provided, and a hollow or solid round bar-shaped movable contactor (9) is loosely inserted in the through conductor (8) to form the through conductor (8).
The fixed contact piece (10) connected to the upper end of the
The movable contactor (9) is adapted to elastically contact with (9) and move linearly up and down while slidingly contacting the through conductor (8) in the through conductor (8). Incidentally, (11) is a guide body which is provided at the lower end of the movable contactor (9) and is in sliding contact with the inner surface of the through conductor (8), and the movable contactor (9) is a fixed contactor piece (10) and a guide body. It is guided by the penetrating conductor (8) via the (11) so as to be linearly movable.

Further, a fixed contactor (12) located directly above the movable contactor (9) is supported on the upper part of the disconnector base (2) via a support insulator (13), and the tip of the movable contactor is directly below it. An insulating operation lever (14) connected to (9) is rotatably supported. The connection between the lever (14) and the movable contactor (9) is performed by loosely fitting the pin (16) implanted in the movable contactor (9) into the long hole (15) at the tip of the lever (14). When the lever (14) rotates up and down, the movable contactor (9) moves up and down while slidingly contacting the through conductor (8), and the movable contactor (9) contacts and separates from the fixed contactor (12).

Furthermore, in the load side chamber (5), the grounding device base (17) is fixed to one of the partition walls (1a), and the grounding contact (19) is supported by this through the supporting insulator (18), The contact
(19) is connected to the through conductor (8) led out from the lower end of the through bushing (6) through the connecting conductor (20), and the base
A ground blade (21) whose base is grounded and whose tip is in contact with and separated from the grounding contactor (19) is rotatably supported by (17).

Then, during maintenance and inspection of the cubicle, the movable contactor (9) is moved down by the operation lever (14) to move the fixed contactor (12).
, And disconnect the disconnector, and then the grounding blade.
The grounding device is brought into contact with the grounding contactor (19) by contacting the grounding contact (19), and grounding is completed to start the work. To restore the energized state, contrary to the above, the grounding device is turned off and then the disconnector is turned on.

[Problems to be solved by the invention]

However, in the case of the prior art, since the disconnecting switch and the grounding device are individually configured and separately arranged, each component is required individually and becomes expensive, and there is a problem that the storage space for these is large. Yes, it is extremely disadvantageous in miniaturizing the cubicle.

By the way, there is the above-mentioned operation procedure between the disconnector and the grounding device, and if this is mistaken, a three-phase short-circuit accident will occur, so a mechanical and electrical interlock should be provided between them. There are many.

However, in the above-mentioned conventional technique, the disconnector and the grounding device are separately arranged, and the drive systems thereof are completely separated. Therefore, when a mechanical interlock is provided between the two, the mounting size is large and the number of parts is increased. However, there is a problem that the space factor becomes worse and the cost becomes higher.

[Means for Solving the Problems] The present invention has been made in view of the above problems, and a through bushing having a tubular through conductor provided therein and a through conductor that slides inside the through conductor. A movable contactor that moves linearly while making contact, a rotatable insulating operation lever that connects the tip of the movable contactor to the movable contactor and moves the movable contactor in and out of contact with the fixed contactor, and the tip end is disconnected from the ground. And a rotatable grounding blade that comes into contact with and separates from the tip of the movable contact at the position.

[Action]

Therefore, in the disconnector of the present invention configured as described above, when the insulating operation lever is rotated, the movable contactor connected thereto slides in the tubular through conductor of the through bushing to the conductor. Moves in a straight line, enters and leaves a fixed contact,
In the disconnection state in which the cutting operation is performed and the movable contact is separated from the fixed contact, on the other hand, the movable contact is used as a grounding contact, and the grounding blade rotates to move to the movable contact at the disconnection position. Grounding is completed by direct contact.

〔Example〕

Next, the present invention will be described in detail with reference to FIGS. 1 to 3 showing the first embodiment.

In these drawings, the same symbols as those used above indicate the same things, and a different point from the above is that the ground blade (21) 'whose base is grounded is rotatably supported on the disconnector base (2), The point is that the tip of the ground blade (21) 'is directly brought into contact with and separated from the tip of the movable contactor (9) at the disconnection position.

That is, a blade support body (23) is provided immediately below a lever support body (22) on a base (2) supporting an insulating operation lever (14) having a two-plate structure, and only a tip portion is a wide two-plate board. The ground blade (21) 'of the structure is loosely inserted between the two plates of the operation lever (14) from above and is rotatably supported by the blade support (23), and the tip of the ground blade (21)' is Always operating lever (14)
Is located above.

When the disconnector is turned on in the disconnector disconnection state and the grounding device insertion state shown in the drawing, first, as shown by a two-dot chain line in FIG. Separate the tip from the movable contactor (9), then rotate the operating lever (14) upward to slide the movable contactor (9) onto the through conductor (8) of the through bushing (6). It moves linearly upward and contacts the fixed contact (12).

In addition, when the load side is grounded for maintenance and inspection of the cubicle from this state, first, rotate the operation lever (14) downward to linearly move the movable contactor (9) downward to move the fixed contactor.
(12), then the grounding blade (21) 'is rotated downward to move the tip of the grounding blade (21)' to the movable contactor (9) at the disconnection position.
Touch the tip of.

Here, the mechanical interlock between the disconnector side and the grounding device side is performed by the insulating operation lever (14) on the disconnecting device side and the grounding blade (21) 'on the grounding device side, for example, the solid line in FIG. From this state, even if the operating lever (14) is rotated upward without moving the grounding blade (21) 'and the closing operation is attempted, the grounding blade (21)' contacting the movable contact (9) is operated. The lever (14) cannot be turned on because it cannot be turned upward, and the operation lever cannot be closed from the two-dot chain line in the figure.
Even if the grounding lever (14) is rotated downward without attempting to operate the (14), that is, without disengaging the movable contactor (9) from the fixed contactor (12), the operation lever ( 1
4) prevents the grounding blade (21) 'from rotating downward and cannot be grounded.

The grounding blade (21) 'is rotated upward, and the opening position is inclined with respect to the vertical by an angle θ in the opening direction, and the grounding blade (21)' and the blade (21) ' Even if the ‘′ drive unit is disengaged, it will not be charged naturally.

[Effect of device]

As described above, according to the disconnector of the present invention, the movable contactor (9) which moves linearly in response to the rotation of the insulating operation lever (14) and comes in contact with and separates from the fixed contactor (12) is grounded in the disconnected state. Since it can be used as a contactor for the grounding blade (21) 'to directly contact it to function as a grounding device, the conventional disconnector and the grounding device can be integrated and stored. The space can be reduced, that is, the size can be reduced, and the configuration can be simplified and the cost can be reduced, which is extremely effective in reducing the size of the cubicle.

Further, since the disconnector and the grounding device can be integrated, when a mechanical interlock between them is taken,
The space factor becomes good, and it is possible to simplify the mechanism. Particularly, in the case of the embodiment, the insulating operation lever (14) on the disconnector side and the ground blade (21) ′ on the grounding device side interfere with each other. As a result, an interlock can be obtained, and there is an effect that it is not necessary to separately provide an interlock device.

[Brief description of drawings]

1 to 3 show one embodiment of a disconnecting switch of the present invention, FIG. 1 is a cutaway side view of the whole, and FIGS. 2 and 3 are side views of a main part and a plan view thereof. The following figures show a conventional example, FIG. 4 is a sectional side view, and FIG. 5 is a sectional view of a through bushing. (6) ... through bushing, (8) ... through conductor, (9) ... movable contact, (12) ... fixed contact, (14) ... insulation control lever, (21) ′
… Grounding blade.

Claims (1)

[Scope of utility model registration request] 1. A through bushing having a tubular through conductor provided therein, a movable contactor that moves linearly while slidingly contacting the through conductor in the through conductor, and a movable contact having a tip connected to the movable contactor. A rotatable insulating operation lever that linearly moves the child to move toward and away from the fixed contact, and a rotatable grounding blade that is grounded and has its tip contacting and separating from the tip of the movable contact at the disconnection position are provided. Disconnector.