KR20030026391A - Arc extinction structures for a circuit breaker and an electric switch having arc-magnetic operating mode - Google Patents

Abstract

PURPOSE: Arc extinction structures for a circuit breaker and an electric switch having arc-magnetic operating mode is provided to reduce the load on an operator by simplifying the extinguishing part and downsize the product. CONSTITUTION: Arc extinction structures comprise a fixed member(110), a movable member(120) and an insulating cover(130). The fixed member(110) comprises flat plates(111,112) with a fixed main contact(111c) and a fixed arc contact(112c), respectively, and a pair of hook-shaped inserting parts(113a,113b). The movable member(120) is adjacent to the fixed member(110) for the hinge-like switch operation between the hook-shaped inserting parts(113a,113b), and has a movable main contact and a movable arc contact which contact with the fixed main contact(111c) and the fixed arc contact(112c), respectively. The insulating cover prevents an electric current caused by a contact between the fixed member and the movable member.

Description

Arc extinction structures for a circuit breaker and an electric switch having arc-magnetic operating mode}

The present invention relates to an arc self-driving circuit breaker and an arc extinguishing structure for switchgear, and in particular, by adopting a main contact to the arc extruding structure to form a plurality of paths of the breaking current, the damage of the contact is reduced, and the magnetic flux is reduced to only the fixed contact shape. The present invention relates to an arc magnetic drive type circuit breaker and a switchgear structure for a switch which can effectively obtain the breaking performance by causing the arc to be streamlined magnetically driven.

In general, a SF ₆ gas load switch, a distribution class and a low voltage circuit breaker mainly employ a paper extinguishing system or a rotary arc extinguishing system.

The popper extinguishing method is composed of a papper seal, a piston, a movable contact, a nozzle, a fixed contact, and the like, and is a method of securing a breaking performance by using a high pressure generated by compressing the papper seal with a piston. However, in this method, in order to obtain a high compressive force to the paprika, a strong manipulator is required to operate, a lot of related components of the manipulator and the extinguishing unit are required, and thus the cost is high.

Rotary arc extinguishing method is composed of driving coil, fixed contact, movable contact, short-circuit (arc runner), etc., and it is a method to secure the breaking performance by rotating the arc by magnetic force by the driving coil. However, in this method, the breaking performance by the driving coil is good for the small current blocking, but relatively weak for the large current blocking.

The present invention has been made to improve the above problems, and provides a arc self-driven circuit breaker and switchgear structure for the circuit breaker that can reduce the cost of the manipulator shape and reduce the load of the manipulator by simplifying the shape of the arcing unit. The purpose is to.

Figure 1 is a perspective view showing the overall configuration of the arc self-driven circuit breaker and switchgear structure for the breaker according to the present invention.

2 is a perspective view showing the configuration of a fixing member in the structure of FIG.

3 is a side view showing an operation relationship of the structure of FIG.

<Explanation of symbols for the main parts of the drawings>

110 fixing member 111,112 flat plate

111c ... Fixed contact

113a, 113b ... hook-type insert 120 ... movable member

120a ... Movable main contact 120b ... Movable arc contact

130 ... Insulation cover member 110s ... Plate spring

In order to achieve the above object, the arc magnetic drive circuit breaker and the switchgear structure for the switch according to the present invention,

It is located at both ends, and a fixed main contact is provided at a predetermined portion on one side, and a fixed arc contact is provided at a predetermined portion on the other side, and is positioned between the two flat plate portions and connected to each flat portion, A fixing member composed of a pair of hook-type inserts spaced apart from each other at a predetermined interval to form symmetry;

A movable contact between the pair of hook-type inserts of the fixing member is installed close to the fixing member to enable a hinged opening and closing movement, and the end of the body is in contact with a fixed main contact provided on one side plate of the fixing member. A point is provided, and a movable member having a movable arc contact provided at a substantially central portion of the body to be in contact with a fixed arc contact provided on the other plate portion of the fixed member; And

It is installed on each of the inner surface and the upper surface of the pair of hook-shaped insertion portion of the fixing member, and both sides of the body of the movable member, respectively, to prevent energization due to contact between unwanted parts between the fixing member and the movable member It is characterized in that it comprises an insulating cover member for.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 to 3 show the arc magnetic drive circuit breaker and the arc extinguishing structure for the switch according to the present invention, Figure 1 is a perspective view showing the overall configuration, Figure 2 is a configuration of a fixing member in the structure of Figure 1 3 is a side view illustrating an operation relationship of the structure of FIG. 1.

1 to 3, the arc magnetic drive circuit breaker and the arc extinguishing structure of the switch according to the present invention is largely composed of a fixing member 110, a movable member 120 and the insulating cover member 130.

The fixing member 110 is positioned at both ends of the body, and a flat main part 111c is provided at a predetermined portion on one side and a fixed arc contact 112c is provided at a predetermined portion on the other side. 112 and a pair of hook-type inserts positioned between the two flat plate portions 111 and 112 and connected to the flat plate portions 111 and 112, respectively, and spaced apart from each other at a predetermined interval to form symmetry. 113a) and 113b. Preferably, the lower portion of one side plate portion 111 serving as a terminal portion of the fixing member 110 moves the fixing member 110 up and down within a predetermined angle range during contact and detachment with the movable member 120. A leaf spring 110s is further installed to enable this.

Movable member 120 is installed close to the fixing member 110 to enable the hinged opening and closing movement between the pair of hook-type insertion portion (113a) (113b) of the fixing member 110, the end of the body The movable main contact point 120a is provided to be in contact with the fixed main contact point 111c provided on one side plate portion 111 of the fixing member 110, and the other flat plate portion of the fixing member 110 is disposed at a substantially central portion of the body. A movable arc contact 120b is provided in contact with the fixed arc contact 112c provided on the 112.

As described above, the structure of the contact involved in the fault current interruption is further involved to the main contact point in addition to the arc contact point, that is, the path of the break current is composed of a plurality of paths of the main contact point and the arc contact point. The damage of the contact can be greatly alleviated, and the size of the contact can be reduced accordingly.

On the other hand, the insulating cover member 130 is an insulating cover member (130a, 130b) respectively installed on the inner surface and the upper surface portion of the pair of hook-type insertion portion (113a) (113b) of the fixing member 110 facing each other And an insulating cover member 130c installed on both side portions of the body of the movable member 120, and thus are installed at each position as described above, and thus unwanted portions between the fixed member 110 and the movable member 120 are provided. Prevents energization due to contact between In FIG. 3, reference numeral 140 denotes a pedestal for supporting and fixing the fixing member 110.

Then, the operation of the arc magnetic drive circuit breaker and the switchgear structure for the switchgear of the present invention having the above configuration will be briefly described.

In the power system system provided with the circuit breaker and switchgear which employ | adopted the extinguishing part structure of this invention, when a fault occurs in a system by some cause and a fault current flows, this fault current is interrupted | blocked. That is, when a fault current is sensed by a specific sensing means (not shown) in the system, the main controller (not shown) of the system issues an operation unit driving command, and when the operation unit (not shown) is driven, the normal current is energized. The movable member 120 in contact with the fixing member 110 is separated from the fixing member 110 by drawing a circular arc trajectory. In this process, an arc is generated between the fixed arc contact 112c and the movable arc contact 120b, which is caused by the magnetic force caused by the shape of the fixed member 110 and the flat plate portion of the terminal portion of the fixed member 110. You will be called to (111). That is, in FIG. 3, the current flowing through the fixing member 110 is a single circular trajectory as it flows through the winding coil although a part is opened by the hook-type inserts 113a and 113b of the fixing member 110. As the magnetic field flows outward from the ground, the direction of the arc current flows vertically upward, that is, from the fixed arc contact 112c toward the movable arc contact 120b. They are subjected to a force toward the terminal portion side flat portion 111 of the fixing member 110 by the left hand law of Fleming. Therefore, the arc has a bow shape convexly convex toward the terminal portion side flat plate portion 111, and the length of the straight line of the arc becomes longer. The longer the arc, the greater the resistance in the current flow path, and the greater the resistance, which results in less current flow. The result is that it is easier to block.

On the other hand, when the fault current is interrupted in the above series of processes, the current is energized to the arc contacts 112c and 120b as described above, and when the contact is closed, the interruption current is connected to the arc contacts 112c and 120b. Electricity is supplied to the plurality of paths of the contacts 111c and 120a. Therefore, melting of the contact due to the magnitude of the current can be suppressed. This effect is the result of reducing the size of the contact point.

As described above, the arc self-driving circuit breaker and the arc extinguishing structure for the switch according to the present invention employ the main contact in addition to the arc contact in the extinguishing portion to form a plurality of paths of the breaking current to reduce the damage of the contact, The size can be miniaturized, and the magnetic current can be easily streamlined by inducing the magnetic flux only by the shape of the fixing member, thereby easily blocking the fault current. In addition, the cost of the product can be reduced by simplifying the shape of the extinguishing portion, and the product can be miniaturized by reducing the load on the manipulator.

Claims (2)

It is located at both ends, and a fixed main contact is provided at a predetermined portion on one side, and a fixed arc contact is provided at a predetermined portion on the other side, and is positioned between the two flat plate portions and connected to each flat portion, A fixing member composed of a pair of hook-type inserts spaced apart from each other at a predetermined interval to form symmetry; A movable contact between the pair of hook-type inserts of the fixing member is installed close to the fixing member to enable a hinged opening and closing movement, and the end of the body is in contact with a fixed main contact provided on one side plate of the fixing member. A point is provided, and a movable member having a movable arc contact provided at a substantially central portion of the body to be in contact with a fixed arc contact provided on the other plate portion of the fixed member; And It is installed on each of the inner surface and the upper surface of the pair of hook-shaped insertion portion of the fixing member, and both sides of the body of the movable member, respectively, to prevent energization due to contact between unwanted parts between the fixing member and the movable member An arc magnetic drive circuit breaker and switchgear structure for an arc self-driving method, comprising an insulating cover member. The method of claim 1, An arc characterized in that the lower side of the plate portion that serves as a terminal portion of the fixing member is further provided with a leaf spring for allowing the fixing member to move up and down within a certain angle range during contact and detachment with the movable member. Self-driving breaker and switchgear structure.