JPH08249987A - Three position switch - Google Patents

Abstract

PURPOSE: To provide a three position switch capable of connecting a contact part at the tip of a moving contact to a grounding fixed contact without increasing a driving energy source and making the whole part large. CONSTITUTION: A fixed contact connecting to one conductor, a grounding fixed contact 10 supported with a through conductor of a bushing passing through a gas insulating container, and a moving contact which is supported in a supporting conductor capable of rotating connecting to the other conductor and taking three positions of a turning in position coming in contact with the fixed contact, a grounding position coming contact with the grinding fixed contact 10, and a turning off position between these two positions are arranged on the inside of the gas insulating container. The moving contact is operated with an operating mechanism so that a contact part 19a of the tip takes three positions. A meeting contact part 10a extending to the fixed contact side so as to exist along a locus 34 drawn by the contact part 19a at the tip of the moving contact is formed in the grounding fixed contact 10.

Description

Detailed Description of the Invention

[0001]

The present invention relates to a DS (disconnector) and an ES.
The present invention relates to a three-position switch in which a contact portion at the tip of a movable contact has three positions, which is also provided with a (ground switch).

[0002]

2. Description of the Related Art FIGS. 3 and 4A to 4C show the structure of a conventional three-position switch of this type. The 3-position switch is a tubular container 1a with a vertical orientation.
And a tubular lateral container 1b connected in a direction orthogonal to the gas-insulated container 1 including three-phase conductors 3U, 3V, 3W in the lateral container 1b.
These three-phase conductors 3U, 3V, 3W are respectively supported on the support 4 via the insulator 5.

3 for each of these three-phase conductors 3U, 3V, 3W
Although the switch body 6 of the position switch is provided, only the U-phase structure is shown as a representative in this embodiment.

In this switch body 6, a fixed contact 8 connected to a U-phase conductor 3U by a connecting conductor 7 and a bushing made of an epoxy resin whose insulator 9a penetrates the vertically oriented container 1a of the container 1 are provided. The grounding fixed contact 10 supported by the penetrating conductor 9b of FIG. 9 and the supporting conductor 11 connected to the other conductor (not shown) have their base portions rotatably supported by the connecting pin 12 and come into contact with the fixed contact 8 at the entry position A.
And a movable contact 13 having three positions, a grounding position B that contacts the grounding fixed contact 10 and a cutting position C that is an intermediate position between these two contacting positions. The grounded fixed contact 10 is grounded outside the vertically oriented container portion 1a.

The movable contact 13 is a pair of parallel conductors 1.
4a and 14b and spacers 15 and 16 between the parallel conductors 14a and 14b for ensuring a necessary minimum distance.
And a connecting shaft 1 for connecting the parallel conductors 14a and 14b
7, 18 and the spring receiving plates 19a arranged outside the parallel conductors 14a and 14b at the connecting pin 12 and the connecting shaft 17,
19b, 20 and the spring receiving plate 19b and the parallel conductor 14b, and between the spring receiving plate 20 and the parallel conductor 14b are arranged to urge the coil springs in a direction in which the distance between the parallel conductors 14a, 14b is narrowed. 21 and 22, and the tips of the parallel conductors 14a and 14b are paired contact portions 14as and 14b.
s.

The movable contact 13 is operated by the operation mechanism 23 so that the contact portions 14as, 14bs at the tip end thereof take the three positions A, B, C. The operating mechanism 23 includes an operating shaft 2 that hermetically penetrates the vertically oriented container portion 1a.
4 and a lever 25 rotatably driven by the operation shaft 24
And an insulating operation rod 26 pivotally connecting the intermediate portion of the movable contact 13 and the tip portion of the lever 25. That is, one end of the insulating operating rod 26 is pivotally connected to the movable contact 13 by the connecting shaft 18, and the other end is pivotally connected to the tip of the lever 25 by the connecting pin 27.

The supporting conductor 11 is the bottom plate 2 of the vertically oriented container portion 1a.
It is insulated and supported by an insulating spacer 30 attached to the hole 29 of No. 8. The lower end of the support conductor 11 is connected to a cable head (not shown) via a connection conductor 31.

An insulating support 32 is erected on the bottom plate 28 of the vertically oriented container 1a, and the conductor 3 is provided at the tip of the insulating support 32.
3 is supported, and the fixed contact 8 is supported on the lower surface of the conductor 33.

The other V-phase and W-phase conductors 3V and 3W side switch main body 6 are also configured in the same manner by shifting their positions.

[0010]

In such a three-position switch, the moving distance of the contact portions 14as and 14bs at the tip of the movable contact 13 is required to be large.
Therefore, the length of the movable contact 13 becomes long, but since the movable contact 13 is pulled by the insulating operation rod 26 with a force F as shown in FIG. 5 in the middle of the movable contact 13, the force for rotating the movable contact 13 is the force F. Becomes F1 which is a component force of, and this force F1 becomes smaller than the force F. Moreover, the point of action of the force F1 is not at the tip of the movable contact 13 but at the position of the connecting shaft 18, and the point of action of the force F1 causes the movable contact 13 to move.
The distance L to the connecting pin 12, which is the center of rotation, is also short. Therefore, the moment (L × F1) for rotating the movable contact 13 is small.

When the drive energy for rotating the movable contact 13 by the operation shaft 24 is given from the stored spring, the stored drive energy is released as the movable contact 13 rotates and becomes gradually smaller. Therefore, the contact portions 14as, 1 at the tip of the movable contact 13
In the final step in which 4bs is fitted and contacted with the ground fixed contact 10, the contact resistance 14as, 14b is lost due to the insertion resistance.
There is a problem that s cannot reach the final position where it is sufficiently fitted and contacted with the ground fixed contact 10.

As a means for solving the problem, the movable contact 13
It is conceivable to increase the drive energy source that attempts to rotate the control shaft 24 with the operating shaft 24. However, in this case, the rotation speed for rotating the movable contact 13 is increased, and it is necessary to increase the mechanical strength of related parts. , Not economical.

As another solution, it is conceivable to appropriately select the position of the operating shaft 24 and the length of the lever 25, but this causes a problem that the whole size becomes large.

An object of the present invention is to provide a three-position switch which can connect the contact portion at the tip of the movable contact to the ground fixed contact without enlarging the driving energy source and without increasing the overall size. It is in.

[0015]

According to the present invention, in a gas-insulated container, a fixed contact connected to one conductor, a fixed contact for grounding supported by a through conductor of a bushing penetrating the container, and another conductor are provided. A movable contact which is rotatably supported by a support conductor connected to and which has three positions: an inset position in contact with the fixed contact, a ground position in contact with the fixed contact for grounding, and a cutting position intermediate between these two positions. Is provided, and the movable contact is intended to be improved by a three-position switch having a structure in which the contact portion at the tip of the movable contact is operated by the operation mechanism so as to take the three positions.

The 3-position switch according to claim 1 is
The fixed contact for grounding is provided with a welcome contact portion extending toward the fixed contact so as to be present along the trajectory drawn by the contact portion at the tip of the movable contact.

Further, according to the present invention, in a gas-insulated container, a fixed contact connected to one conductor, a grounding fixed contact supported by a through conductor of a bushing penetrating the container, and a support conductor connected to the other conductor. Of a pair of parallel conductors that are rotatably supported by the three contact points, that is, an in-position that contacts the fixed contact, a ground position that contacts the fixed contact for grounding, and a cutting position intermediate between these two positions. A movable contact is disposed, and the movable contact is targeted for improvement by a three-position switch having a structure in which a pair-shaped contact portion at the tip of the movable contact is operated by an operation mechanism so as to take the three positions.

The 3-position switch according to claim 2 is
The ground fixed contact extends toward the fixed contact so that the tip of the movable contact exists along the trajectory drawn by the pair-shaped contact portion, and when the pair-shaped contact portion arrives, the pair-shaped contact portion extends. It is characterized in that a welcome contact portion that fits between the contact portions is provided.

The three-position switch according to claim 3 is
In Claim 1 or 2, The said fixed contact for grounding which has the said pick-up contact part is being fixed to the front-end | tip of the penetration conductor of a bushing with a bolt.

[0020]

According to the first aspect of the present invention, when the grounding fixed contact is provided with the welcome contact portion extending toward the fixed contact so as to exist along the locus drawn by the contact portion at the tip of the movable contact, the movable contact can be moved. It is possible to electrically connect the contact portion at the tip of the movable contact and the fixed contact for grounding at the welcome contact portion before the energy for rotating the contact is reduced as compared with the conventional case. Therefore, the contact portion at the tip of the movable contact can be connected to the fixed contact for grounding without increasing the drive energy source and without increasing the overall size. In addition, the fixed contact for grounding equipped with such a pick-up contact part,
There is an advantage that the contact area can be increased.

According to a second aspect of the present invention, the fixed contact for grounding extends toward the fixed contact so as to be present along the locus drawn by the paired contact portion at the tip of the movable contact, and the fixed contact for grounding is provided. By providing a contacting portion that fits between the paired contact portions when the contact portion arrives, a parallel conductor type movable contact whose paired contact portion at the tip fits into the fixed ground contact. Even if the insertion resistance at this time is large, it is possible to connect the contact portion at the tip of the movable contact to the fixed contact for grounding at the contacting contact portion without increasing the drive energy source and without increasing the overall size. . When the fixed contact for grounding having the contacting contact portion is fixed to the tip of the through conductor of the bushing with a bolt as in the invention described in claim 3, the centering adjustment of the contact with the movable contact is performed for the grounding. It becomes easier by adjusting the mounting direction of the fixed contact.

[0022]

1 and 2 show an embodiment of a fixed contact 10 for grounding used in a 3-position switch according to the present invention. The ground fixed contact 10 includes
A pick-up contact portion 10a extending toward the fixed contact 8 is provided so as to be present along the trajectory 34 drawn by the contact portion at the tip of the movable contact 13. Fixed contact 10 for grounding having such a contact portion 10a
Is fixed to the tip of the through conductor 9b of the bushing 9 with a bolt 35.

The other structure is the same as that of the conventional example described above.

In this way, the ground fixed contact 10 is
By providing the welcome contact portion 10a extending toward the fixed contact 8 so that the contact portion 10a extending along the trajectory 34 drawn by the contact portion at the tip of the movable contact 13 is provided before the energy for rotating the movable contact 13 decreases as compared with the conventional case. Fixed contact 1 for grounding and contact portion of movable contact 13
An electrical connection with 0 can be made at the pick-up contact portion 10a. Therefore, the contact portion at the tip of the movable contact 13 can be connected to the ground fixed contact 10 without increasing the drive energy source and without increasing the overall size. In addition, the grounding fixed contact 10 including such a contacting contact portion 10a has an advantage that the contact area can be increased.

In particular, as in the present embodiment, the fixed contact 8 for grounding extends toward the fixed contact 8 so that it exists along the trajectory 34 drawn by the paired contact portions 14as, 14bs at the tip of the movable contact 13. The pair type contact part 1
When 4as and 14bs arrive, the pair-shaped contact portions 14as,
When the contacting contact portion 10a fitted between the 14bs is provided, the insertion resistance when the pair of contact portions 14as and 14bs of the movable contact 13 of the parallel conductor type is fitted into the fixed contact 10 for grounding. , The contact portion 1 at the tip of the movable contact 13 does not increase the drive energy source and does not increase the overall size.
4as, 14bs can be connected to the fixed contact 10 for grounding.

Further, the ground fixed contact 10 having the contacting contact portion 10a is the through conductor 9 of the bushing 9.
If it is fixed to the tip of b with the bolt 35, there is an advantage that the centering adjustment of the contact with the movable contact 13 can be facilitated by adjusting the mounting direction of the grounding fixed contact 10.

[0027]

In the three-position switch according to the first aspect of the present invention, the fixed contact for grounding has the welcome contact portion extending toward the fixed contact side so as to be present along the trajectory drawn by the contact portion at the tip of the movable contact. Since it is provided, it is possible to electrically connect the contact portion at the tip of the movable contact to the fixed contact for grounding at the welcome contact portion before the energy for rotating the movable contact is reduced as compared with the conventional case. Therefore, the contact portion at the tip of the movable contact can be connected to the fixed contact for grounding without increasing the drive energy source and without increasing the overall size. Further, the fixed contact for grounding having such a contacting contact portion has an advantage that the contact area can be increased.

In the three-position switch according to the second aspect of the present invention, the fixed contact for grounding extends toward the fixed contact side so that it exists along the trajectory drawn by the pair-shaped contact portion at the tip of the movable contact, and the pair is provided. Since the contact portion to be fitted between the contact portions of the pair is provided when the contact portion of the die arrives, the movable contact is a parallel conductor type, and the contact portion of the pair at the tip is a fixed contact for grounding. Even if there is a large insertion resistance when it is fitted in, the contact part at the tip of the movable contact is connected to the fixed contact for grounding without increasing the drive energy source and without increasing the overall size. can do.

In the three-position switch according to the third aspect of the present invention, since the fixed contact for grounding having the contacting contact portion is fixed to the tip of the through conductor of the bushing with a bolt, centering adjustment of contact with the movable contact is performed. However, there is an advantage that it becomes easier by adjusting the mounting direction of the grounding fixed contact.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing an example of the relationship between a grounding fixed contact and a bushing used in a three-position switch according to the present invention.

FIG. 2 is a vertical cross-sectional explanatory view showing an example of the relationship between the trajectory drawn by the contact portion at the tip of the movable contact and the fixed contact for grounding in the present embodiment.

FIG. 3 is a vertical sectional view of a conventional 3-position switch.

FIG. 4 shows a structure of a movable contact used in a conventional 3-position switch, (A) is a side view,
(B) is a longitudinal sectional view and (C) is a plan view.

5 is an operation explanatory diagram of FIG. 3;

[Explanation of symbols]

 1 Gas Insulated Container 1a Vertical Container 1b Horizontal Container 3U, 3V, 3W 3 Phase Conductor 4 Support 5 Insulator 6 Switchgear Main Body 7 Connection Conductor 8 Fixed Contact 9 Bushing 9a Insulator 9b Through Conductor 10 For Grounding Fixed contact 10a Pickup contact part 11 Support conductor 12 Connecting pin 13 Movable contact 14a, 14b Parallel conductors 14as, 14bs Contact part 15, 16 Spacer 17, 18 Connecting shaft 19a, 19b, 20 Spring receiving plate 21, 22 Coil spring 23 Operation mechanism 24 Operating shaft 25 Lever 26 Insulation operating rod 27 Connecting pin 28 Bottom plate 29 Hole 30 Insulating spacer 31 Connecting conductor 32 Insulating support 33 Conductor 34 Locus 35 Bolt

Claims (3)

[Claims] 1. A gas-insulated container, a fixed contact connected to one conductor, a grounding fixed contact supported by a through conductor of a bushing penetrating the container, and a support conductor connected to the other conductor rotatably. Movable contacts are provided which are supported and come in contact with the fixed contacts, a grounding position in contact with the grounding fixed contacts, and a cutting position intermediate between these two positions. In a three-position switch having a structure in which a contact portion at the tip of the movable contact is operated by an operating mechanism so as to take the three positions, the fixed contact for grounding follows a trajectory drawn by the contact portion of the tip of the movable contact. A three-position switch, characterized in that a pick-up contact portion extending toward the fixed contact is provided so as to be present. 2. A gas-insulated container, a fixed contact connected to one conductor, a grounding fixed contact supported by a through conductor of a bushing penetrating the container, and a support conductor connected to the other conductor rotatably. There are a pair of parallel conductor type movable contacts which are supported and come in three positions, namely, an input position in contact with the fixed contact, a ground position in contact with the ground fixed contact, and a cutting position intermediate between these two positions. A three-position switch having a structure in which the movable contact is arranged by an operating mechanism such that a pair-shaped contact portion at the tip of the movable contact takes the three positions, and the fixed contact for grounding has a tip of the movable contact. Contact of the pair of molds extends toward the fixed contact so as to exist along the trajectory drawn by the contact of the pair of molds, and the contact of the pair of molds is reached when the contact part of the pair of molds arrives. 3-position switch, characterized in that pick contact portions writing fits is provided between. 3. The three-position switch according to claim 1, wherein the grounding fixed contact having the pick-up contact portion is fixed to the tip of the through conductor of the bushing with a bolt. .