JPS6319965B2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a vacuum shear breaker that improves the shearing performance by applying a magnetic field parallel to the arc generated during the shearing. .

Conventionally, many vacuum shield breakers have been proposed that aim to improve the shearing performance by applying a magnetic field in the same direction as the arc (so-called longitudinal magnetic field) to the arc that occurs between a pair of contacts when the shearing occurs. However, this type of vacuum interrupter generally has a coil for generating a magnetic field attached to the vacuum interrupter, which serves as the opening/closing part. There are two types: those with a coil inside the vacuum container as shown in FIG. 1, and those with a coil outside the vacuum container as shown in FIG.

That is, the vacuum interrupter 1 shown in FIG. 1 includes a pair of lead rods 2a and 2b that hermetically penetrate a vacuum container 10 comprising an insulator 11, and a high resistance element is attached to the inner end of both lead rods 2a and 2b. 21 with contacts 3a and 3b, and lead rods 2a,
2b and the contacts 3a, 3b, coil electrodes 4a and 4b are provided to generate a magnetic field parallel to the arc by converting the current into a loop current surrounding the lead rods 2a, 2b, and at least one of the lead rods. 2
b is provided with a bellows 22 between it and the vacuum vessel 10 so as to be movable in the axial direction (in the vertical direction in the figure).

The vacuum interrupter 1 configured as described above is housed in an insulating frame (not shown), and has a terminal at the outer end of each lead rod 2a, 2b that can be freely connected to and separated from a main circuit conductor (not shown). The lead-out conductors 5a and 5b each having a section 51 at one end are connected to each other, and an operating device (not shown) is further attached to form a required vacuum shield and disconnector. Note that 9a and 9b connected to the terminal portion 51 are main circuit conductors.

By the way, the vacuum interrupter constructed as shown in FIG. 1 described above had the following drawbacks.

Since the coil electrodes 4a and 4b are located inside the vacuum vessel 10, they have the disadvantage that when the coil generates heat due to the current flowing through it, it is difficult for this heat to be dissipated to the outside. was inappropriate.

Contacts 3a, 3 are provided at the tips of the lead rods 2a, 2b.
b. Since a plurality of members such as the coil electrodes 4a, 4b and the high-resistance element 21 are integrally connected by brazing, the number of parts and processing steps are large, and the number of brazed parts is large. It had poor durability. Therefore, especially in the case of a vacuum interrupter 1 with a large capacity (for high voltage or large current), the contacts 3a and 3b and the coil electrodes 4a and 4b are large and heavy, so the impact during operation is large and the durability is poor. There was a significant decrease in sexual performance.

The coil electrodes 4a, 4b have respective contacts 3a, 3b.
Because it is located on the back of the coil electrodes 4a and 4b, when one lead rod 2b moves (moves downward in the figure) during a shear break, the pair of coil electrodes 4a, 4b
The gap will widen. As a result, as the distance between the contacts increases, the magnetic field gradually attenuates, causing the problem that the diffused arc becomes concentrated due to the attenuation of the magnetic field, which adversely affects the cutting performance.

From the above, in the vacuum interrupter 1 configured by providing coil electrodes 4a and 4b that generate a vertical magnetic field as shown in FIG. 1 within the vacuum vessel 10 and behind the contacts 3a and 3b, It has become clear that there is a natural limit to the improvement of shearing performance, and that although it is suitable for relatively low-capacity products, it is not suitable for high-capacity products.

For these reasons, for large-capacity vacuum interrupters, the vacuum interrupter shown in Fig. 2, which has been proposed earlier than the vacuum interrupter shown in Fig. 1, has historically been proposed. The technology of a vacuum interrupter in which a vacuum interrupter is disposed outside the vacuum vessel 10 has been reviewed. Next, the vacuum interrupter shown in FIG. 2 will be explained. Items equivalent to those in FIG. 1 are given the same reference numerals, and detailed explanation thereof will be omitted.

That is, only contacts 3a and 3b are provided at the inner ends of the lead rods 2a and 2b, respectively. A coil conductor 4 that generates a vertical magnetic field is wound around the outer periphery of the vacuum container 10, and one winding end of the coil conductor 4 is connected to the fixed lead rod 2a via a connecting lead 6a. It is connected to the outer end, and the other winding end is connected to the lead-out conductor 5a via a connection lead 6b. The vacuum interrupter 1 thus constructed is housed in an insulating frame (not shown) to construct a required vacuum interrupter and disconnector.

By the way, in the case of the vacuum interrupter 1 as shown in FIG. 2, since the coil conductor 4 is provided outside the vacuum vessel 10, even if the coil conductor 4 generates heat, it will not have an adverse effect on the contacts 3a, 3b, etc. There isn't. Since the coil conductor 4 is fixed, the magnetic field applied to the arc does not attenuate and remains constant even if the gap between the pair of contacts 3a, 3b widens when the coil is broken. The structure is simple, as it is only necessary to provide contacts 3a and 3b at the inner ends of the lead rods 2a and 2b. There are various advantages such as:

However, in the conventional vacuum interrupter 1 of this type, the coil conductor 4 is insulated and integrally combined (for example, molded) on the outside of the vacuum vessel 10, so that the coil conductor 4 is not included. The external size of the vacuum interrupter 1 becomes considerably large, and the insulating frame that houses and holds the vacuum interrupter 1 also becomes correspondingly large, resulting in a problem that the disconnector becomes large in size.

Also, connection leads 6a and 6b connect the coil conductor 4, the lead rod 2a, and the lead conductor 5a.
Since the coil conductor 4 was formed by simply extending the winding end of the elementary conductor, the work of individually connecting the connecting leads 6a and 6b to the lead rod 2a and the lead-out conductor 5a was very complicated. It had some flaws.

The present invention has been made in view of the above points, and the lead-out conductor connected to the outer end of the lead rod of a vacuum interrupter is provided with a terminal portion, a connecting portion, and a spacer that electrically separates the two. Constructed integrally,
On the other hand, the coil conductor is fixed to an insulating frame that holds the vacuum interrupter and the lead-out conductor, and the ends of both windings of the coil conductor are connected separately to the terminal part and the connecting part of the lead-out conductor, thereby making it possible to further improve the performance. The present invention provides a vacuum shear breaker with improved shear breaker performance.

Next, embodiments of the present invention will be explained based on FIGS. 3 to 17. In these figures, the same reference numerals as in FIGS. 1 and 2 indicate products equivalent to these. Therefore, detailed explanations of these will be omitted.

First, a vacuum shield breaker according to an embodiment of the present invention will be described with reference to FIGS. 3 to 8. FIG. 3 is a cross-sectional side view of the main part of the vacuum shield breaker, showing the configuration for one phase. Contacts 3a and 3b are provided at the inner ends of a pair of lead rods 2a and 2b that hermetically penetrate the vacuum container 10, respectively, and one lead rod 2a is fixed, and the other lead rod 2b is connected to a bellows 22. The vacuum interrupter 1 is configured to be movable through the insulating frame 8, which is housed in an approximately cylindrical insulating frame 8 with a gap, and a pair of lead-out conductors. This insulating frame 8 is connected via 5a and 5b.
The hold is fixed.

That is, one of the lead-out conductors 5a is fixed to the upper end of the insulating frame 8, and the connecting portion 52 on one end side (the right side in the figure) of the lead-out conductor 5a has a
A lead rod 2a on the fixed side of the vacuum interrupter 1 is connected and fixed. The other lead conductor 5b is
The lead rod 2b on the movable side of the vacuum interrupter 1 is movable (freely in the vertical direction in the figure) to the ring contact 53, which is fixed to the intermediate part of the insulating frame 8 and provided at the connection part 52 of the lead-out conductor 5b. It is inserted through it.

The pair of lead-out conductors 5a, 5b are both provided extending in the same direction (to the left in FIG. 3), and are provided at the tip of the terminal portion 51, which is the left end side of each lead-out conductor 5a, 5b. are each fitted with a contact 54 so as to be able to engage and come into contact with the ends of the main circuit conductors 9a and 9b.

The terminal portion 51 and connecting portion 52 of the lead-out conductor 5b located on the lower side are integrally uniaxially formed of a highly conductive material such as copper material.
On the other hand, the lead-out conductor 5a located on the upper side has a terminal portion 51.
and a connecting portion 52 are made of copper material, and these are integrally (uniaxially) connected by a spacer 7 that electrically separates them. Further within the insulating frame 8 and the vacuum interrupter 1
A coil conductor 4 is buried in the area surrounding the contact points 3a and 3b (particularly the part of the pair of contacts 3a and 3b), and both winding ends 41 and 42 of this coil conductor 4 are
Each of them is provided to protrude outward from the insulating frame 8 and extend in the same direction as the lead-out conductor 5a. Both winding ends 41 of this coil conductor 4,
42, and the terminal portion 51 and connection portion 5 of the drawer conductor 5a.
2 through separately formed connection leads 6b and 6a, respectively.

In FIG. 3, reference numeral 81 denotes a stand frame on which the insulating frame 8 is erected, and has a built-in operating device (not shown). Reference numeral 82 denotes an operating rod, whose upper end is connected to the movable lead rod 2b of the vacuum interrupter 1, and whose lower end is movably connected to an operating device (not shown) within the gantry frame 81. 83 is a surface plate erected on the pedestal frame 81.

Next, the configuration and connection configuration between one of the lead-out conductors 5a and the coil conductor 4 will be explained in more detail based on FIGS. The connecting portion 52 is
The terminal portion 51 and the connecting portion 52 are linearly connected together via the spacer 7, and have through holes 55 and 56 to which the connecting leads 6a and 6b are attached, respectively. The spacer 7 prevents electrical continuity between the terminal portion 51 and the connection portion 52, and is made of an insulating material (for example, plastic, alumina ceramics), or a low conductive metal material such as stainless steel, The legs are made of Inconel alloy. In particular, this spacer 7 is made of a material with low conductivity (stainless steel, Inconel alloy)
It is undeniable that some current will leak and conduct, but in order to minimize this leakage current, the cross-sectional area in the direction perpendicular to the connection direction between the terminal part 51 and the connecting part 52 must be It is desirable to make it as small as possible.

Further, as shown in FIG. 5, the coil conductor 4 has a rectangular conductor having a width B larger than a thickness T wound in approximately one turn, and both winding ends 41 and 42 are opposed to each other with a gap in between. The winding end portions 41 and 42 are provided with mounting seats 43 and 44 at their distal ends, respectively. Each of the mounting seats 43 and 44 has a connecting lead 6.
A screw hole 45 is provided for joining a and 6b, and as shown in FIG. It is not open on the side (the side of the lead-out conductor 5b...see FIG. 3). Although it is convenient in terms of construction to provide the screw holes 45 through the mounting seats 43 and 44, the winding ends 41 and 42 of the coil conductor 4 are connected to the pair of lead-out conductors 5a and 5b.
Since it is located in the middle part of the other lead conductor 5
b. For this purpose screw hole 45
If the screw hole 45 is open toward the lead-out conductor 5b side, there is a risk that a flash may occur due to the protrusion inside the screw hole 45. To prevent this, the screw hole 45 is provided without penetrating the screw hole 45.

The connection leads 6a and 6b are made of copper material, for example, and have a threaded portion 61 on one end so that they can be screwed into the mounting seats 43 and 44 of the coil conductor 4, as shown in FIG. The other end has a lead conductor 5a.
It has a rod-like shape and includes a threaded portion 62 that is inserted through and fixed to the screw portion 62 .

As shown in FIG. 4, the lead conductor 5a, the coil conductor 4, and the connection leads 6a, 6b configured as described above are connected to the mounting seat 43 of one winding end 41 of the coil conductor 4 and the terminal of the lead conductor 5a. The mounting seat 44 of the other winding end portion 42 and the connecting portion 52 of the lead-out conductor 5a are connected to each other by a connecting lead 6a.

Next, the flow of current in the vacuum shield breaker configured as described above will be explained based on FIGS. Reached 6b
I ₁ , and becomes a loop current I ₂ flowing through the coil conductor 4 to generate a vertical magnetic field, and then flows through the other connecting lead 6a, I ₃ , reaching the connecting part 52, I ₄ , and the fixed side lead of the vacuum interrupter 1. A rod 2a, a pair of contacts 3a and 3b (via an arc when the wire is broken),
and _I5 which reaches the other lead-out conductor 5b via the movable lead rod 2b.

Note that if the winding ends 41, 42 of the coil conductor 4 and the connection leads 6a, 6b are covered with an insulating material, the insulation strength between them and the other lead conductor 5b or ground will be sufficient. Further, the insulating frame 8 is not limited to a cylindrical shape, and may be composed of a plurality of rod-shaped insulating columns. In this case, the coil conductor 4 is preferably disposed with an insulating coating.

Next, other embodiments of the present invention are shown in FIGS. 9 to 17.
The explanation will be based on the figures, but the same reference numerals as in the above-mentioned figures 3 to 8 indicate products equivalent to these, so a detailed explanation of these will be omitted and different parts will be omitted. I will mainly explain.

First, what is shown in FIG. 9 is a mounting seat 43 that is provided at the tip of both winding end parts 41, 42 so that each winding end part 41, 42 of the coil conductor 4 protrudes radially outward to the same extent. , 44 are arranged in parallel to form the coil conductor 4. On the other hand, the lead-out conductor 5a includes protrusions 51a and 52a at both ends of the terminal portion 51 and the connecting portion 52, and the tips of the protrusions 51a and 52a are each made of an insulating material or a low-conductivity metal material. are connected to each other through spacers 7a and 7b, and both protrusions 51a,
A gap A is formed between the side portions of 52a, and they are integrally connected linearly. Then, the protrusion 51a of the terminal portion 51 and the mounting seat 43 provided on the winding end portion 41 of the coil conductor 4 are connected by the connection lead 6b,
Further, the protrusion 52a of the connecting portion 52 and the mounting seat 44 provided on the winding end portion 42 of the coil conductor 4 are connected by a connecting lead 6a, so as to generate a longitudinal magnetic field. Note that if the spacers 7a and 7b are formed of an insulating material, the terminal portion 51 and the connecting portion 52 may be completely joined with the spacer without forming the air gap A. Further, arrows in the figure indicate the flow of current.

According to the configuration shown in FIG. 9, since the pair of connection leads 6a and 6b are arranged in parallel at the same distance from the center of the vacuum interrupter 1, one winding end 41 of the coil conductor 4 (or 42) does not protrude outward as shown in FIG. There are advantages.

Next, what is shown in FIG. 10 is one in which the structure of the lead-out conductor 5a is made even simpler using the coil conductor 4 explained in FIG. 9 above. That is, the lead-out conductor 5a is arranged such that the ends of the terminal portion 51 and the joint portion 52 are overlapped and offset (shifted to one another), and a spacer 7 made of an insulating material or a low-conductivity metal material is provided. Furthermore, one winding end 41 and the terminal part 51 of the coil conductor 4 are connected via the connecting lead 6b, and the other winding end 42 and the connecting part 52 are connected together through the connecting lead 6.
This configuration is configured to generate a longitudinal magnetic field by connecting via a. Note that the spacer 7 is made of a metal material with low conductivity (e.g. stainless steel, Inconel alloy).
In the case where the cross section is made of , it is preferable to form the cross section into an I-shape as shown in FIG. Further, arrows in the figure indicate the flow of current.

Next, in the case shown in FIGS. 11 to 15, the coil conductor 4 and the connection leads 6a, 6b are integrally formed only from a rectangular conductor forming the coil conductor 4. and the drawer conductor 5a
This is intended to simplify the connection configuration.

First, in the coil conductor 4 shown in FIGS. 11 and 12, a rectangular conductor is wound as shown in FIG. forming connection leads 46 and 47 extending in the direction;
Furthermore, the tips of each connection lead 46, 47 (upper part)
A through hole 48 is provided in the portion. On the other hand, the lead-out conductor 5a is constructed by linearly integrally connecting a terminal portion 51 and a connecting portion 52 with a spacer 7 made of an insulating material or a low conductive material. One connection lead 47 of the coil conductor 4 is connected to a terminal portion 51.
The other connecting lead 46 of the coil conductor 4 is connected to the connecting part 5 through a mounting bolt 49.
2 through a mounting bolt (not shown), and is configured to generate a vertical magnetic field. Note that the arrows in the figure indicate the flow of current.

Next, what is shown in FIGS. 13 and 14 is a pair of connection leads 46, 47 provided on the coil conductor 4.
The coil conductor 4 is configured such that the positions are approximately the same as the winding center of the coil conductor 4,
On the other hand, the lead-out conductor 5a includes a terminal portion 51 and a connecting portion 52, and has protrusions 51a and 52a at both ends thereof, respectively. The tip of one connection lead 47 of the coil conductor 4 is connected to the lead-out conductor 5.
The tip of the other connection lead 46 of the coil conductor 4 is placed in contact with the outer surface of the protrusion 51a of the terminal portion 51 forming the lead-out conductor 5a. A cylindrical distance 71 is disposed in contact with the outer surface, and is interposed between the protrusion 52a of the connection part 52 and the protrusion 51a of the terminal part 51, and the connection lead 46 and the connection part 52, the distance 71, the protrusion 51a of the terminal part 51, and the connecting lead 47 are inserted into the connecting bolt 72, and a nut is screwed to connect these members together. The device is configured to generate a longitudinal magnetic field. In addition,
The distance 71 and the connecting bolt 72 are both made of an insulating material or a low-conductivity metal material, and constitute the spacer 7 that electrically separates the terminal portion 51 and the connecting portion 52 of the lead-out conductor 5a. It is. Further, arrows in the figure indicate the flow of current.

According to the configurations shown in FIGS. 13 and 14, the connection between the lead conductor 5a and the coil conductor 4 and the electrically separated connection between the terminal portion 51 and the connecting portion 52 forming the coil conductor 5a are performed using the spacer. 7 can be carried out at the same time, and the number of assembly steps can be reduced. Furthermore, since the connection leads 46 and 47 of the coil conductor 4 are arranged in parallel at the same distance from the winding center of the coil conductor 4 (the center of the vacuum interrupter 1), the coil conductor 4 of FIG. Compared to the case where the coil conductor 4 is not connected to the other lead-out conductor 5b (third
The advantage is that it is easy to ensure insulation from the wire (see figure).

Next, what is shown in FIG. 15 is one in which the structure of the lead-out conductor 5a is further simplified using a coil conductor 4 having substantially the same structure as the coil conductor 4 described in FIG. 13 above. That is, the drawer conductor 5a is
The ends of the terminal portion 51 and the joint portion 52 are stacked on top of each other and integrally connected with a spacer 7 made of an insulating material or a low-conductivity metal material interposed therebetween. It is connected and fixed to the side surface of the terminal part 51 via a mounting bolt (not shown), and the other connection lead 47 is connected to the mounting bolt 49.
It is configured to be connected and fixed to the side surface of the terminal section 52 via the terminal section 52 to generate a vertical magnetic field. Note that the arrows in the figure indicate the flow of current.

In each of the embodiments described above, a case has been described in which the lead-out conductors 5a and 5b are provided with contacts 54 at the ends of their terminal portions 51, but the contact 54 is not limited to this configuration. 9b... (see FIG. 3), while the ends of the lead-out conductors 5a and 5b may be left in a rectangular state so that they can be inserted into and removed from the contacts 54.

Also, the lead rod 2 on the fixed side of the vacuum interrupter 1
The lead-out conductor 5a (upper side in FIGS. 3 and 8) connected to the terminal part 51, the connecting part 52,
Although a case has been described in which the spacer 7 is configured to electrically separate the two and the coil conductor 4 is connected, the present invention is not limited to this.
As shown in Figure 6, the lead conductor 5b (bottom side in the figure) is connected to the lead rod 2b on the movable side of the vacuum interrupter 1.
Alternatively, as shown in FIG. 17, it may be carried out in a pair of upper and lower lead-out conductors 5a, 5b, and the coil conductor 4 is connected to each lead-out conductor 5a, 5b.
There is no problem even if the configuration is such that a pair is provided to be connected to 5b. In addition, Figures 16 and 17
This figure corresponds to the above-mentioned FIG. 3, and the same reference numerals as in FIG. 3 are used to omit the explanation of the structure.

As is clear from the above description, the present invention has various effects as described below.

A vacuum interrupter 1 and a coil conductor 4 are configured separately, and the vacuum interrupter 1 is fixed to an insulating frame 8 via lead-out conductors 5a and 5b, while the coil conductor 4 is fixed to an insulating frame 8, and Output conductors 5a, 5b and coil conductor 4
By connecting these on the outside of the insulating frame 8, a vertical magnetic field application type vacuum interrupter is constructed. Alternatively, by using this kind of vertical magnetic field application type vacuum interrupter 1 which is configured with coil electrodes 4a, 4b or coil conductor 4 directly externally (FIG. 2), a vertical magnetic field application type vacuum interrupter can be created. The structure of the vacuum interrupter 1 itself is extremely simple compared to its constituent parts, and a vacuum interrupter and disconnector that is inexpensive and easy to assemble can be obtained.

The lead conductors 5a and 5b connected to the lead rods 2a and 2b of the vacuum interrupter 1 are connected to the terminal portion 51.
, the connecting portion 52 , and the spacer 7 that electrically separates the two, so that both ends of the coil conductor 4 fixed outside the vacuum interrupter 1 in the winding direction By separately connecting the terminal portions 51 and connection portions 52, a vacuum shield disconnector that can apply a vertical magnetic field can be constructed.Moreover, since the coil conductor 4 is fixed, a pair of Even if the distance between the contacts 3a and 3b is widened, the attenuation of the magnetic field can be eliminated and the breaking performance can be improved.

Both winding ends of the coil conductor 4 are connected to a lead-out conductor 5a,
Since it is disposed so as to protrude in the same direction as the extending direction of the conductor 5b, the connection with the lead-out conductors 5a and 5b can be made with a simple structure.

On the other hand, in the case of the lead-out conductors 5a and 5b, since the terminal part 51 and the connecting part 52 can be configured uniaxially with the spacer 7 in between, the lead-out conductors 5a and 5b can be made much larger, longer, and longer than conventional lead-out conductors. It does not become complicated, and does not lead to an increase in the size of the vacuum chamber or disconnector, or even to the size of devices such as a switchboard.

Since the lead-out conductors 5a, 5b and the coil conductor 4 constitute a vacuum shield breaker that applies a vertical magnetic field, the lead-out conductors 5a, 5b and a part of the insulating frame 8 are slightly modified, and the coil conductor 4
By adding a , it is possible to change the conventional non-vertical magnetic field application type vacuum shear breaker to a vertical magnetic field application type vacuum shear breaker, improving the shearing performance and using the same type. It is possible to achieve a higher level of insulation ability, that is, a higher capacity, in a vacuum insulation disconnector.

[Brief explanation of the drawing]

1 and 2 are schematic explanatory diagrams of a conventional vacuum interrupter, and FIGS. 3 and 8 are sectional side views and schematic diagrams of essential parts of a vacuum interrupter according to an embodiment of the present invention. , FIG. 4, FIG. 5, FIG. 6, and FIG. 7 are perspective views of the extraction conductor, coil conductor, and connection lead part in FIG. 3, FIG. 4 is an assembled view, and FIG. 5 is a diagram of the coil conductor, FIG. 6 shows the lead-out conductor, and FIG. 7 shows the connection lead. Figure 9, Figure 10, Figure 11, Figure 1
3 and 15 are assembled perspective views of a lead-out conductor, a coil conductor, and a connecting lead part according to other embodiments of the present invention, FIG. 12 is a perspective view of the coil conductor in FIG. 11, and FIG. 14 is a perspective view of the coil conductor in FIG. FIG. 13 is an exploded perspective view of a spacer, and FIGS. 16 and 17 are schematic diagrams of main parts of a vacuum shield breaker according to other embodiments of the present invention. 1 is a vacuum interrupter, 10 is a vacuum container, 2
a, 2b are lead rods, 3a, 3b are contacts, 4 is a coil conductor, 46, 47, 6a, 6b are connection leads, 5a, 5b are lead conductors, 51 is a terminal portion, 52
is a connection part, 7 is a spacer, 8 is an insulating frame, 9
a and 9b are main circuit conductors.

Claims (1)

[Claims] 1 A pair of opposing lead rods 2a, 2 that hermetically penetrate the vacuum container 10 and can move toward and away from each other.
a vacuum interrupter 1 comprising contacts 3a and 3b at the inner ends of the lead rods 2a and 2b, respectively connected to the outer ends of the pair of lead rods 2a and 2b included in the vacuum interrupter 1; A pair of lead-out conductors 5a, 5b which are provided as a main circuit conductor 9a, 9b and can be freely connected to and separated from the main circuit conductors 9a, 9b, an insulating frame for holding and fixing the vacuum interrupter 1 and the lead-out conductors 5a, 5b, and a vacuum container of the vacuum interrupter 1. 10, the coil conductor 4 is wound around the outer periphery of the coil conductor 4 and generates a magnetic field parallel to the arc generated between the pair of contacts 3a, 3b.
At least one of the pair of lead-out conductors 5a, 5b is provided with a strip, and both winding ends of the coil conductor 4 are provided extending in the same direction as the extension direction of the lead-out conductors 5a, 5b. 5a or 5b)
, a terminal portion 51 that can be connected to the main circuit conductors 9a and 9b, and a lead rod 2 of the vacuum interrupter 1.
a, 2b are connected, and a spacer 7 that electrically separates the two, the coil conductor 4 is fixed to the insulating frame, and one of both winding ends of the coil conductor 4 is fixed. Pull out conductor 5
A vacuum shield disconnector characterized in that the terminals a and 5b are connected to terminal portions 51, and the other is connected to a connecting portion 52.