JPH10172397A - Rotating-arc-type gas-blast circuit breaker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely generate magnetic flux even at the application of a force to the end of a movable contact, without short-circuiting a spiral assisting coil. SOLUTION: A rotating-arc-type gas-blast circuit breaker, in which a movable electrode 13 and a fixed electrode 2 are placed within a container 1 and an arc runner 9 having an arc driving coil 10 on its outer periphery is provided to surround the fixed electrode 2, is provided with a fixed main contact 4 and a fixed arcing contact 5 which are provided on the fixed electrode 2, an arc runner 9 mounted in proximity to the fixed arcing contact 5, an arc driving coil 10 connected to the fixed electrode 2 at one end and to the arc runner 9 at the other, and a movable arcing contact 15 having a cylindrical core 15a made of a high-resistance material which is provided on the movable electrode 13, and having a spiral assisting coil 15b made of a conductive material on the outer periphery of the core 15a, and having an arching contact 15c at its end.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary arc type gas circuit breaker in which a movable electrode and a fixed electrode are arranged in a container, and an arc runner having an arc driving coil is provided around the fixed electrode. is there.

[0002]

2. Description of the Related Art A conventional rotary arc type gas circuit breaker is shown in FIG.
It is configured as shown in FIG. In the figure, reference numeral 20 denotes a sealed container made of an insulating material. A partition plate 21 made of an insulating material is arranged in the sealed container 20 to form a pressurizing chamber 22. A connection conductor 23 is fixed to the sealed container 20 at the upper part of the boosting chamber 22, and a fixed contact 24 made of a tulip contact is attached to the connection conductor 23. 25 is connection conductor 2
The drive coil 26 is mounted on the support cylinder 25. The drive coil 26 has one end connected to the fixed contact 24 via the support cylinder 25 and the connection conductor 23, and the other end connected to the arc runner 27. The arc runner 27 is made of a conductive material and attached to the inner peripheral surface and the lower surface of the drive coil 26. Reference numeral 28 denotes a movable contact, through which the partition plate 21 is inserted, and an auxiliary coil 29 is provided at the tip. The auxiliary coil 29 has a horizontal cut groove and a vertical cut groove to form the auxiliary coil 29 having several turns. Next, the opening operation of the rotary arc type gas circuit breaker will be described. Movable contact 28
Is actuated downward, the movable contact 28 is moved to the fixed contact 24.
And an arc is generated between the movable contact 28 and the fixed contact 24. The current at this time flows through the auxiliary coil 29 of the movable contact 28 and flows from the tip of the auxiliary coil 29 to the fixed contact 24 via an arc. Magnetic flux is generated at the tip of the movable contact 28 by the current flowing through the auxiliary coil 29. This magnetic flux causes the arc foot on the movable contact 28 to rotate. The movable contact 28 is the fixed contact 24
, The arc foot on the fixed contact 24 moves onto the arc runner 27. When the arc foot moves onto the arc runner 27, current flows from the movable contact 28 through the auxiliary coil 29 to the arc runner 27 via the arc. The current flowing through the arc runner 27 flows through the drive coil 26 to the support cylinder 25 and to the fixed contact 24. Magnetic flux is generated near the arc runner 27 by the current flowing through the driving coil 26. The drive coil 26
Contact 28 and arc runner 2 due to the magnetic flux generated in
The arc is guided to extinction while rotating the arc between 7 and 7 to open the electric circuit.

[0003]

However, in the conventional rotary arc type gas circuit breaker, since the auxiliary coil 29 is formed by providing a cut groove at the tip of the movable contact 28, the movable contact 28 is fixedly contacted. When a force is applied to the tip of the movable contact 28 during contact with the armature 24, the side walls of the cut groove contact each other and the auxiliary coil is short-circuited. For this reason, there was a disadvantage that no magnetic flux was generated in the auxiliary coil. Therefore, the present invention
Even if a force is applied to the tip of the movable contact, an object of the present invention is to reliably generate a magnetic flux without short-circuiting the spiral auxiliary coil due to contact between the side walls of the cut groove of the movable contact. .

[0004]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides an arc runner having a movable electrode and a fixed electrode disposed in a container and surrounding the fixed electrode and having an arc driving coil on the outer periphery. In the rotating arc type gas circuit breaker provided, a fixed-side main contact and a fixed-side arc contact provided on the fixed electrode, and a conductive member attached to the fixed electrode close to the fixed-side arc contact via an insulating material. An arc runner made of a material, an arc driving coil provided on the outer periphery of the fixed-side arc contact and having one end connected to the fixed electrode and the other end connected to the arc runner, and attached to the movable electrode which is in contact with and separated from the fixed main contact A movable main contact and a cylindrical mandrel made of a high-resistance material provided on the movable electrode, a movable auxiliary having a spiral auxiliary coil made of a conductive material on the outer periphery of the mandrel and having an arc contact at the tip. And a chromatography click contacts.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on an embodiment shown in the drawings. FIG. 1 is a cross-sectional front view of a main part of a rotary arc type gas circuit breaker according to a first embodiment of the present invention, and FIG. 2 is an enlarged side view of the main part. In the figure, reference numeral 1 denotes a cylindrical container made of an insulating material. A fixed electrode 2 is fixed on the container, an external terminal 3 is provided at one end, and a fixed main contact 4 is attached to the other end. 5 is a fixed electrode 2
The fixed-side arc contactor attached to, 6 is a cylindrical cover plate,
The fixed-side arc contact 5 is covered and fixed to the fixed electrode 2. Reference numeral 7 denotes an insulator filled in the outer periphery of the cover plate 6, and 8 denotes a conductive cylinder embedded in the insulator 7, and an arc runner 9 is provided at an upper end thereof.
Is fixed. Reference numeral 10 denotes an arc drive coil wound around the outer periphery of the insulator 7 and the conductive tube 8, one end of which is connected to the arc runner 9, and the other end of which is connected to the fixed electrode 2. Reference numeral 11 denotes a movable electrode support provided on the container 1. The movable electrode 13 is provided on a sliding contact 12 provided on the movable electrode support 11.
Are supported so as to be able to slide up and down. As shown in FIG. 2, the movable electrode 13 is formed of a cylindrical body made of a conductive material, and an annular movable main contact 14 that comes into contact with and separates from the fixed main contact 4 is provided at an intermediate portion of the cylindrical body. A movable arc contact 15 is provided at the tip of the body. The movable side arc contact 15 is a cylindrical mandrel 15 made of a high-resistance material.
a, a spiral auxiliary coil 15b made of a good conductive material provided on the outer periphery of the mandrel 15a, and an arc-resistant arc contact 15c provided at the tip of the mandrel 15a and the spiral auxiliary coil 15b. It is composed of The base ends of the mandrel 15a and the helical auxiliary coil 15b are integrally formed by silver brazing, the upper end is screw-connected, and the arc contact 15c is integrally formed by silver brazing at the tip. It is.
In this case, the winding direction of the spiral auxiliary coil 15b is such that the direction of the magnetic field generated when a current flows through the spiral auxiliary coil 15b is opposite to the direction of the magnetic field generated by the arc driving coil 10, the arc runner 9, and the movable-side arc contact 13. The directions are the same between them. Next, the opening operation of the rotary arc type gas circuit breaker will be described. The state shown by the dashed line in FIG. 1 shows the closed state of the rotary arc type gas circuit breaker. When the movable electrode 13 is operated downward from this closed state, the movable main contact 14 is separated from the fixed main contact 4. The current at this time flows from the movable-side arc contact 15 through the fixed-side arc contact 5 to the external terminal 3 via the fixed electrode 2. A magnetic flux is generated in the coil 15b of the movable arc contact 15 by the current flowing through the movable arc contact 15. Further, when the movable electrode 13 is operated downward, the movable-side arc contact 15 is separated from the fixed-side arc contact 5, and an arc is generated between the movable-side arc contact 15 and the fixed-side arc contact 5. Movable arc contact 1
5 generates a magnetic flux in the coil 15b of the movable arc contact 15. The magnetic flux generated in the coil 15b rotates the arc leg of the movable arc contact 15. Further, when the movable-side arc contact 15 is separated from the fixed-side arc contact 5, the arc foot on the fixed-side arc contact 5 moves onto the arc runner 9. When the arc foot moves onto the arc runner 9, a current flows from the movable electrode 13 through the movable arc contact 15 through the arc-extinguishing gas to the arc runner 9. The electric current flows from the arc runner 9 to the external terminal 3 via the fixed electrode 2 through the arc driving coil 10. Magnetic flux is generated by the current flowing through the arc driving coil 10. The combined magnetic flux of the magnetic flux generated in the arc driving coil 10 and the magnetic flux generated in the movable-side arc contact 15 acts on the arc, drives the arc to rotate, and guides the arc to arc extinction. Thus, the coil 15b is provided on the movable-side arc contact 15 so that the movable-side arc contact 15
Since the upper arc foot is rotationally driven, the arc foot does not stick on the movable arc contact 15 and no metal vapor is generated from the movable arc contact 15. FIG. 3 is an enlarged side view of a main part of a movable-side arc contact according to a second embodiment of the present invention. The cylindrical core made of a high-resistance material provided on the movable-side main contact 14 is shown in FIG. A spiral auxiliary coil 15b made of a highly conductive material is provided on the outer periphery of the gold 16. An arc contact 15c is attached to the tip of the mandrel 15a and the spiral auxiliary coil 15b. An insulating material 15d is filled and buried between the steps of the spiral auxiliary coil 15b, and a cylindrical coil holder 15e made of a high-resistance material is provided on the outer periphery of the spiral auxiliary coil 15b and the insulating material 15d. . With this configuration, it is possible to prevent damage between the stages of the spiral auxiliary coil 15b due to the electromagnetic force generated by the current flowing through the spiral auxiliary coil 15b.

[0006]

As described above, according to the present invention, even when a force is applied to the tip of the movable-side arc contact, the helical auxiliary coils can reliably generate a magnetic flux without short-circuiting each other. From the moment of arc generation, the arc can be driven to extinguish by rotating the arc.

[Brief description of the drawings]

FIG. 1 is a cross-sectional front view of a main part of a gas switch showing a first embodiment of the present invention.

FIG. 2 is an enlarged side view of a main part showing the first embodiment of the present invention.

FIG. 3 is an enlarged side view of a main part showing a second embodiment of the present invention.

FIG. 4 is a sectional view of a main part of a conventional rotary arc gas switch.

[Explanation of symbols]

Reference Signs List 1 container, 2 fixed electrode, 3 external terminal, 4 fixed side main contact, 5 fixed side arc contact, 6 cover plate,
7 Insulator, 8 Conductive tube, 9 Arcrunner, 1
0 arc drive coil, 11 movable electrode support, 12
Sliding contact, 13 movable electrode, 14 movable main contact, 15 movable arc contact, 15a mandrel,
15b auxiliary coil, 15c arc contact, 15d
Insulation material, 15e coil holder

Claims (2)

[Claims] 1. An arc runner (9) having a movable electrode (13) and a fixed electrode (2) arranged in a container (1), and having an arc driving coil (10) around the fixed electrode (2). A fixed-side main contact (4) and a fixed-side arc contact (5) provided on the fixed electrode (2), and an insulating material interposed between the fixed electrode (2) and the fixed electrode (2). An arc runner (9) made of a conductive material attached in close proximity to the fixed-side arc contact (5); provided on the outer periphery of the fixed-side arc contact (5); one end connected to the fixed electrode (2); The other end is the arc runner (9)
And an arc driving coil (10) connected to the movable electrode (13) and a fixed main contact (4) attached to the movable electrode (13).
A movable-side main contact (14) that comes into contact with and separates from the movable-side electrode; and a movable-side arc contact (15) that is provided on the movable electrode (13) and approaches and separates from the fixed-side arc contact (5). The arc contact (15) comprises a movable electrode (13)
Is provided with a cylindrical mandrel (15a) made of a high-resistance material, a spiral auxiliary coil (15b) made of a conductive material is provided on the outer periphery of the mandrel (15a), and an arc contact (1) is provided at the tip.
5c) A rotary arc type gas circuit breaker characterized by comprising: 2. An insulating material (15d) is buried between the steps of the spiral auxiliary coil (15b), and a high resistance material is formed on the outer periphery of the spiral auxiliary coil (15b) and the insulating material (15d). The rotary arc type gas circuit breaker according to claim 1, further comprising a cylindrical coil retainer (15e).