JPH0574285A - Vacuum electromagnetic contactor - Google Patents

Abstract

PURPOSE:To prevent the contactor from being impaired due to impact of a device during its transportation, by mounting a stopper to an upper portion of the vacuum valve, which stopper projects upwardly through a top surface of the frame and abuts on the fuse-side end portion of the conductor. CONSTITUTION:A bolt projecting upwardly through the top surface of a frame 2 is disposed, as a stopper 14, with its hexagonal head being directed upside and is fixed to a fixing nut provided to an upper portion of a vacuum valve 1. A connecting conductor 9 is provided so as to abut on the top end of the stopper 14. Since the stopper 14 serves as an anti-vibration member for the conductor 9, the conductor 9 is free from impairment even when the device receives an impact. Nor is a fuse 4 drawn off.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pull-out type vacuum electromagnetic contactor with a fuse for opening and closing and protecting power equipment such as a high voltage motor and a capacitor.

[0002]

2. Description of the Related Art FIG. 3 is a side view showing a structural example of a conventional drawer type vacuum electromagnetic contactor with a fuse. An insulative frame 2 for accommodating a vacuum frame 1 having contacts inside the vacuum container and a drive device (not shown) disposed below the vacuum valve 1 for opening and closing the contacts of the vacuum valve 1 is a carriage frame 3. Mounted on. Trolley frame 3 has wheels 3
A is provided and is stored in a switchboard panel (not shown) so that it can be taken in and out. An upper terminal plate 8 and a lower terminal plate 11 are conductively connected to the contacts serving as contacts of the vacuum valve 1, respectively, and penetrate the frame 2 to be drawn out to the outside. One end of the lower terminal plate 11 is connected to the disconnecting contact 5 through the conductor 10.
Conductive connection to A. Further, one end of the upper terminal plate 8 is conductively connected to the fuse clamp 7A via a U-shaped connecting conductor 9. Further, the fuse 4 is arranged above the frame 2 and is held by the fuse clamps 7A and 7B. Fuse clamp 7B is conductively connected to another disconnecting contact 5B via conductor 6. Further, the conductors 6 and 10 are supported by an insulating support 12 fixed to the bogie frame 3 and are at ground potential.
Insulated from. The disconnecting contacts 5A and 5B are
This is for inserting the fuse 4 and the vacuum valve 1 into the main circuit by sandwiching a main circuit conductor (not shown) in the board when the carriage frame 3 is drawn into the switchboard panel.

[0003]

However, the conventional device as described above has a problem that parts are damaged when the device is dropped or shocked during transportation and transportation. That is, since the conventional device supports one side of the fuse only by one end of the U-shaped connecting conductor, one side of the fuse is easily vibrated in the vertical direction. Therefore, when an excessive load due to a drop or impact is applied to the device, the connection conductor material itself may exceed the elastic limit, the connection conductor may be deformed, or a crack may be generated in the bent portion. In addition, as a result, the fuse may come off the fuse clamp in some cases.

An object of the present invention is to prevent the connecting conductors from being damaged even if the device is shocked during transportation.

[0005]

In order to achieve the above object, according to the present invention, there is provided a frame for accommodating a vacuum valve having a contact inside a vacuum container and a drive device for opening and closing the contact of the vacuum valve. An upper terminal plate that is conductively connected to each of the contacts of the contact and that extends through the upper and lower portions of the frame to the outside of the frame, and a lower terminal plate,
A vacuum valve comprising a connection conductor having one end conductively connected to the upper terminal plate and the other end conductively connected to a fuse clamp, and a fuse attached to the fuse clamp and arranged above the frame. A stopper that penetrates the upper surface of the frame and projects upward and contacts the other end of the connection conductor is provided at the upper part of the. Further, a frame accommodating a vacuum valve having a contact inside the vacuum container and a drive device for opening and closing the contact of the vacuum valve, and a contact of the contact are conductively connected to the frame and penetrate the upper and lower parts of the frame. The upper terminal plate and the lower terminal plate that are pulled out to the outside of the frame, a connecting conductor whose one end is conductively connected to the upper terminal plate and the other end is conductively connected to the fuse clamp, and the frame clamp attached to the fuse clamp It is assumed that the other end of the connecting conductor is brought into contact with the upper surface of the frame in the case of the fuse arranged above.

[0006]

According to the structure of the present invention, the stopper which penetrates the upper surface of the frame and projects upward is attached to the upper portion of the vacuum valve. By abutting the stopper on the side of the connecting conductor where the fuse clamp is attached, the stopper serves as a steady stop for the connecting conductor, so that the connecting conductor is not damaged even when the device is impacted.

Further, by bringing the end surface of the connection conductor on the side where the fuse clamp is attached into contact with the upper surface of the frame, the frame serves as a steady stop for the connection conductor, and the connection conductor is not damaged even when the device is impacted. ..

[0008]

EXAMPLES The present invention will be described below based on examples.
1 is a side view showing the configuration of a vacuum electromagnetic contactor according to an embodiment of the present invention. The inside of the frame 2 is shown by cutting out a part of the side surface of the frame 2 around the upper portion of the vacuum valve 1. As the stopper 14, a bolt penetrating the upper surface of the frame 2 and protruding upward is arranged with its hexagonal head facing upward, and the fixing nut 1 provided on the upper portion of the vacuum valve 1
It is fixed at 3. The connecting conductor 9 is the stopper 14
Is configured to abut the upper end of the. Since other configurations are the same as those of FIG. 3, the same reference numerals are used for the same components, and detailed description thereof will be omitted.

In FIG. 1, since the stopper 14 serves as a steady stop for the connecting conductor 9, the connecting conductor is not damaged even if the device is shocked, and the fuse 4 is not removed. The stopper 14 need not be a bolt, but may be a shaped steel or an insulating rod.

FIG. 2 is a side view showing the structure of a vacuum electromagnetic contactor according to another embodiment of the present invention. Connection conductor 90
The left end side of is bent into an L shape, and its end surface 90A is in contact with the upper surface of the frame 90. The other structure is the same as that of FIG.

In FIG. 2, the end surface 90A of the connecting conductor 90 is shown.
Since it serves as a steady rest of the connecting conductor 90, the connecting conductor 90 is not damaged even when the device is shocked, and the fuse is not removed. Moreover, since the end portion of the connecting conductor is simply bent as compared with the conventional device, it is possible to improve without increasing the number of parts at all. Although not shown, in FIG. 3, the connection conductor 9 may have the same shape, a protrusion may be attached to the lower surface of the left end of the connection conductor 9, and the protrusion may be brought into contact with the frame 2.

[0012]

As described above, according to the present invention, the stopper is provided on the upper portion of the vacuum valve, and the connecting conductor is brought into contact with the stopper, so that the connecting conductor may be damaged even if the device is shocked. No more worrying about the fuse coming off.

Further, according to the present invention, as described above, since the end portion of the connection conductor is brought into contact with the upper surface of the frame, the connection conductor is not damaged even if the device is shocked.
Also, the fuse does not come off. Further, it is possible to easily improve the configuration of the conventional device without increasing the number of parts.

[Brief description of drawings]

FIG. 1 is a side view showing a configuration of a vacuum electromagnetic contactor according to an embodiment of the present invention.

FIG. 2 is a side view showing a configuration of a vacuum electromagnetic contactor according to another embodiment of the present invention.

FIG. 3 is a side view showing a configuration example of a conventional vacuum electromagnetic contactor.

[Explanation of symbols]

 1 vacuum valve 2 frame 3 bogie frame 3A wheel 4 fuse 5A disconnecting contactor 5B disconnecting contactor 6 conductor 10 conductor 7A fuse clamp 7B fuse clamp 8 upper terminal plate 11 lower terminal plate 9 connecting conductor 90 connecting conductor 12 insulating support 13 fixing nut 14 Stopper 90A End surface

Claims (2)

[Claims] 1. A frame for accommodating a vacuum valve having a contact inside a vacuum container and a drive device for opening and closing the contact of the vacuum valve, and an upper part and a lower part of the frame which are conductively connected to each contact of the contact The upper terminal plate and the lower terminal plate which are pierced through to the outside of the frame, the connecting conductor whose one end is conductively connected to the upper terminal plate and the other end is conductively connected to the fuse clamp, and attached to this fuse clamp. In a structure including a fuse arranged above the frame, a stopper is provided on an upper portion of the vacuum valve, the stopper penetrating an upper surface of the frame and protruding upward, and abutting on the other end of the connection conductor. Vacuum electromagnetic contactor. 2. A frame for accommodating a vacuum valve having a contact inside the vacuum container and a drive device for opening and closing the contact of the vacuum valve, and an upper part and a lower part of the frame which are conductively connected to the contact of the contact The upper terminal plate and the lower terminal plate which are pierced through to the outside of the frame, the connecting conductor whose one end is conductively connected to the upper terminal plate and the other end is conductively connected to the fuse clamp, and attached to this fuse clamp. A vacuum electromagnetic contactor comprising a fuse arranged above the frame, wherein the other end of the connecting conductor is brought into contact with the upper surface of the frame.