KR100675984B1 - Gas Insulated Circuit Breaker - Google Patents

Abstract

The fixed side can be operated simultaneously with the operation of the movable part, so that the blocking operation can be realized even at low operating force, and the arc contact opening speed of the driving side and the driven side can be effectively blocked even at the low compression force of the movable side due to the low operating force. It is to provide a triple insulated gas insulated circuit breaker which improves the breaking performance by rapidly extinguishing the arc at the time of opening by rapidly increasing the main contact opening speed more than the main contact opening speed.

Such a gas insulated circuit breaker of the present invention is drive-connected between the nozzle and the second movable main contactor, and links the linear driving force from the nozzle in a direction opposite to the moving direction of the nozzle to provide the second movable main contactor. A first link drive-connected to said nozzle and linearly moving in the same direction as said nozzle, a second link drive-connected to a second movable main contactor and moving in a direction opposite to said nozzle, first link and second A link mechanism including a first lever rotatably driven about a rotating shaft fixedly connected between the links and redirecting linear power from the first link in the opposite direction to provide the second link to the second link;

One end portion displaceable to a position in driving contact with the link mechanism and a position separate from the link mechanism, rotatable about a fixed rotational axis when driving contact with the link mechanism, and a moving speed of the second movable arc contactor A second lever shorter in length than the first lever to be faster than the moving speed of the second movable main contactor;

One end thereof is connected to the other end of the second lever and extends through the second movable main contact while being guided and supported to be linearly moved by the second movable main contactor, so that the first movable arc contactor is rotated according to the rotation of the second lever. And a second movable arc contactor linearly movable to a position in contact with or separated from the first movable arc contactor.

Gas Insulated Circuit Breaker, Gas Insulated Switchgear, Triple Drive, Link

Description

Gas Insulated Circuit Breaker

1 is a cross-sectional view of a gas insulated circuit breaker according to an embodiment of the prior art, FIG. 1 a when the input state, and FIG. Shown.

Figure 2 is a cross-sectional view of a gas insulated circuit breaker according to another embodiment of the prior art, Figure 2a shows a gas insulated circuit breaker according to another embodiment of the prior art when in the closed state, Figure 2b is a trip (trip) state drawing.

3 is a cross-sectional view showing the configuration of a gas insulated circuit breaker according to the present invention.

Figures 4a to 4d is an operating state diagram showing the operating state from the input state of the gas insulated circuit breaker according to the invention shown in Figure 3 to the trip completion state.

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

42: first operation main contact 44: compression cylinder

46: first movable arc contactor 48: cylinder rod

50: nozzle 52: second operation main contactor

54: second movable arc contactor 56: first link

58: second link 60: first lever

64: second lever 70: drive member

72: rock pin 74: second stopper

76: first stopper

The present invention relates to a gas insulated circuit breaker or a gas insulated switchgear, and more particularly, the opening speed of the arc contact is higher than that of the driving side and the driven side of the breaker and the main contact when tripping the breaker to increase the breaking performance with a small energy. The present invention relates to a triple acting gas insulated circuit breaker that can be configured quickly to cut off the arc.

Gas Insulated Switchgear (GIS) is a device that protects power system electrical equipment by opening and closing lines in abnormal conditions such as ground and short circuits as well as opening and closing of power transmission and substation lines in a normal state. SF6 with excellent insulation and extinguishing characteristics by embedding a disconnecting switch, earthing switch, lightning arrester, main bus and feeder bus in a grounded metal tank This product is insulated and extinguished by gas or nitrogen gas. It is an advanced switchgear with advantages such as miniaturization of substation, improvement of safety and reliability, ease of operation and maintenance, and harmony with environment.

Among them, the gas circuit breaker (GCB) is a main protection device that protects the power system by cutting off the fault current in abnormal conditions such as ground fault, short circuit and load accident as well as the opening and closing of the normal line. .

Such a breaker moves a cylinder rod connected to a cylinder to a trip position by a driving force generated from an actuator such as an electric spring charged by hydraulic, pneumatic or motor, which is a driving device of the breaker. When the insulating SOHO gas in the compression chamber is compressed by the movement of the cylinder rod, the compressed high-pressure SOHO gas is injected into the arc to cool and arc the fault current to cut off the current. Therefore, the trip operation for breaking the fault current requires a higher output than the closing operation.

Figure 1 shows a conventional circuit breaker, Figure 1a shows the closing state of the breaker and Figure 1b shows the tripping state of the breaker. The breaker 2 shown in FIG. 1 includes a fixed arc contact 4, a nozzle 6, a fixed main contact 8, a movable arc contact 10, a compression cylinder 12, a fixed cylinder 14, a fixed piston. 16, the cylinder rod 18, the insulating rod 20, etc. are comprised.

The breaker 2 shown in FIG. 1 transmits power in the direction of an arrow through an insulating rod 20 connected to an actuator during a trip operation so that the nozzle 4, the movable arc contactor 10, and the compression cylinder 12 are moved. The cylinder rod 18 moves in the direction of the arrow (rightward in the drawing), so that the volume of the compression chamber of SOHO gas formed by the compression cylinder 12, the fixed piston 16, and the cylinder rod 18 is increased at high speed. The arc extinguishing gas is compressed in the compression chamber as it decreases as shown in 1b, and an arc is generated between the arc contacts from the moment when the fixed arc contactor 4 and the movable arc contactor 10 are separated. It is injected toward the arc through 6 to extinguish the arc by extinguishing the arc.

Unlike the prior art of FIG. 1 in which the fixed main contactor 8 and the fixed arc contactor 4 are fixed, FIG. 2 is a conventional embodiment in which a dual motion method in which both the main contactor and both arc contactors are simultaneously moved. A circuit breaker 22 according to another example of the technology is illustrated, and FIG. 2A illustrates an input state of the circuit breaker and FIG. 2B illustrates a trip state of the circuit breaker. The breaker 22 shown in FIG. 2 includes a nozzle 24, a movable arc contact 26, a compression cylinder 28, a cylinder rod 30, a first link 32, a second link 34, and a lever ( 36), the fixed cylinder 38, and the like.

In the circuit breaker illustrated in FIG. 2, the actuator is operated during the trip operation and power is transmitted in the direction of the arrow so that the nozzle 24, the movable arc contactor 26, the compression cylinder 28, and the cylinder rod 30 move in the direction of the arrow (in the drawing). 2B, the first link 32 connected by the connecting pin to the upper end of the nozzle 24 and the upper end of the lever 36 moves in the same direction as the direction of the nozzle 24, as shown in FIG. 2B. The upper end of the lever 36 moves in the same direction as the direction of the nozzle 24, and the lower end of the lever 36 moves in the direction opposite to the direction of the nozzle 24. As a result, the second link 34 connected to the lower end of the lever 36 moves in the opposite direction to the direction of the nozzle 24, and the fixed side cylinder 38 connected to the second link 34 moves in the direction of movement of the movable part. It moves in the opposite direction (left side in the drawing). By using the moving force of the movable part, the fixed cylinder 38 is moved at the same speed in the direction opposite to the moving direction of the movable part to extinguish the arc and cut off the current.

However, the compression-type breaker shown in FIG. 1 has a problem in that a large output actuator is required as a driving source of the cylinder rod 18 and the insulating rod 20 in order to extinguish the arc. The double drive circuit breaker shown in Fig. 9 has the advantage of requiring a small actuator output, but the actuator output is small, so the speed of the driving side such as the compression cylinder 28, the cylinder rod 30, etc. is slow, and thus the arc contact of the arc contactor (separation) Since the speed is also slow, there was a problem in that the small current interruption, which requires a fast arc cut-off speed, in accordance with the deterioration of the arc extinguishing speed.

The present invention is to solve the above-described problems, the simultaneous movement of the drive main contactor can be moved in the opposite direction to the movement direction of the drive main contactor can implement the blocking by a low output actuator, After the opening of the main contact on the driving side and the driven side, the driven arc contactor is moved more quickly than the main contact on the driving side to increase the separation speed between the arc contacts so that the arc can be cut off quickly even at low power. It is a technical object of the present invention to provide a triple-insulated gas insulated circuit breaker capable of improving arc extinguishing speed.

The technical problem of the present invention is a drive rod connected to the first fixed cylinder, a second fixed cylinder which is installed at a predetermined interval away from the first fixed cylinder, a cylinder rod linearly driven in the first fixed cylinder, and the cylinder rod A compression cylinder that is linearly movable in the same direction as the movement direction of the cylinder rod in the first fixed cylinder, and connected to a distal end of the cylinder rod to linearly move together in the same direction as the cylinder rod in the first fixed cylinder A first movable arc contactor, a compression chamber of SOHO gas compressed or expanded in accordance with the movement of the cylinder rod and the compression cylinder, a first movable main contactor connected to the tip of the compression cylinder, and the first movable main contactor Connected to the distal end of the element and linearly movable with the first movable main contactor and compressed in the compression chamber. A nozzle for driving the arc gas during the blocking operation, and a linearly movable movement in the second fixed cylinder to a position connected to the nozzle and contacted or separated from the first movable main contact in a direction opposite to the movement direction of the nozzle; A gas insulated circuit breaker having two movable main contacts,

A link mechanism connected between the nozzle and the second movable main contactor to redirect the linear driving force from the nozzle in a direction opposite to the moving direction of the nozzle to provide the second movable main contactor to drive the nozzle A first link connected and linearly moving in the same direction as the nozzle, a second link driving connected to a second movable main contactor and moving in a direction opposite to the nozzle, and driving connected between the first link and the second link; The link mechanism rotatable about a fixed axis of rotation, the link mechanism including a first lever for redirecting linear power from the first link in the opposite direction and providing the second link to the second link;

One end portion displaceable to a position in driving contact with the link mechanism and a position separate from the link mechanism, rotatable about a fixed rotational axis when driving contact with the link mechanism, and a moving speed of the second movable arc contactor A second lever shorter in length than the first lever to be faster than the moving speed of the second movable main contactor;

One end thereof is connected to the other end of the second lever and extends through the second movable main contact while being guided and supported to be linearly moved by the second movable main contactor, so that the first movable arc contactor is rotated according to the rotation of the second lever. It can be achieved by providing a gas insulated circuit breaker according to the invention characterized in that it comprises a; a second movable arc contactor that is linearly movable in contact with or separated from the first movable arc contactor.

The object of the present invention and the constitution and effects of the present invention for achieving the same will be more clearly understood from the following detailed description of the preferred embodiment of the present invention with reference to the accompanying drawings.

First, the configuration of the present invention will be described with reference to FIG. 3, which is a cross-sectional view of a triple driving gas insulated circuit breaker according to an exemplary embodiment of the present invention. The gas insulated circuit breaker 40 shown in FIG. 3 is largely comprised by the drive side, the driven side, and the power transmission part which transmits the power from a drive side to a driven side.

The driving side drives the cylinder rod 48 and the cylinder rod 48 which are connected to the first fixed cylinder 41 and an external actuator (not shown) and are linearly driven in the first fixed cylinder 41. A first compression cylinder (41) connected to a compression cylinder (44) which is connected and linearly moves in the same direction as the movement direction of the cylinder rod (48) in the first fixed cylinder (41), and the tip of the cylinder rod (48); A first movable arc contactor 46 which is linearly movable together with the cylinder rod 48 in the same direction, and a compression chamber of SOHO gas which is compressed or expanded in accordance with the movement of the cylinder rod 48 and the compression cylinder 44 ( C), a first movable main contactor 42 connected to the tip of the compression cylinder 44, and a first movable main contactor 42 connected to the tip of the first movable main contactor 42 to move linearly together with the first movable main contactor 42 The nozzle 50 for spraying the SOHO gas compressed in the compression chamber C It is configured to hereinafter.

More specifically, the compression chamber (C) is a cylinder rod that moves linearly in a state in which the rear side is blocked by a fixed piston (41a) that is integrally connected to and inserted into the first fixed cylinder (41) in the compression cylinder (44). A space in which the volume of the internal space is compressed or expanded by the 48 and the first movable arc contactor 46 and the compression cylinder 44, in which an insulating gas such as sulfur hexafluoride or nitrogen, or SOHO gas, is accommodated. And, when compressed or expanded and compressed, is sprayed through the nozzle 50 towards the second movable arc contact 54.

The driven side is connected to the first fixed main contactor 42 in a direction opposite to the moving direction of the nozzle 50 by being connected to the second fixed cylinder 43 and the nozzle 50, which are spaced apart from the first fixed cylinder by a predetermined interval. The second movable main contactor 52 capable of linearly moving in the second fixed cylinder 43 and the second movable main contactor 52 are guided and supported to be linearly movable by the second movable main contactor 52, and the second movable member is moved. And a second movable arc contact 54 which extends through the main contact 52 and moves linearly to a position in contact with the first movable arc contact 46 or separated from the first movable arc contact 46. .

Here, the second movable main contactor 52 is a cylindrical member in which one side is open and the other side has a through hole (unsigned) through which the second movable arc contact 54 passes.

The power transmission unit includes the link mechanism LK and the second lever 64.

In detail, the link mechanism LK converts the linear driving force from the nozzle 50 in the direction opposite to the moving direction of the nozzle 50 and provides the second movable main contactor 52 with the nozzle ( A first link 56 driven to be connected to 50 and linearly moving in the same direction as the nozzle 50, and a second link to be connected to the second movable main contactor 52 and to be moved in the opposite direction to the nozzle 50. And 58, rotatable about a rotational axis (unsigned), which is driven and fixed between the first link 56 and the second link 58, so that the linear power from the first link 56 is reversed. And a first lever 60 to redirect and provide to the second link 58.

Preferably in the embodiment the drive connection of the first lever 60 and the first link 56 and the second link 58 are interconnected with an unsigned connecting shaft. In order to allow the flow margin or assembly tolerance of the first lever 60, the first lever 60 is a shaft hole into which the connecting shaft connecting the first link 56 or the second link 58 is inserted. Equipped. In the embodiment of FIG. 3, the shaft hole of the connecting pin connected to the first link 56 is formed as a long hole on the first lever 60.

The second lever 64 has one end which is displaceable to a position in driving contact with the link mechanism LK and a position separated from the link mechanism LK, and is fixed to the rotating shaft 68 when driving contact with the link mechanism LK. It is rotatable about, and is configured to be shorter than the length of the first lever 60 so that the moving speed of the second movable arc contact 54 is faster than the moving speed of the second movable main contact (52). Here, the operating speed of the second movable arc contact 54 is due to the rotation of the second lever 64, the rotation of the second lever 64 is the distance between the rotation shaft 68 and the drive member 70. And the length of the connection pin with the second movable contact 54. Thus, the feed speed of the second movable arc contactor 54 connected to the second lever 64 operates faster than the fixed side cylinder 52 connected to the first lever 60. At this time, the speed of the fixed side cylinder 52 is determined by the rotational speed of the first lever 60, and the second movable arc contactor 54 is quickly moved at a predetermined position by the rapid rotation of the second lever 64 connected thereto. It will work.
The fixed rotating shaft 68 is fixed and supported by a shaft support 66 fixedly installed on the rear surface of the second movable main contactor 52.

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In a preferred embodiment, the drive member 70 composed of pins or protrusions is installed to be assembled or integrally formed on the first link 56 of the link mechanism LK, so that the drive member 70 is straight with the first link 56. It is movable.

The second lever 64 has a fork portion which is formed at one end and is displaceable to a position which is in drive contact with the drive member 70 of the link mechanism LK and a position separated from the drive member 70, The fork portion here consists of a pair of forks 64a and recessed grooves 64b formed between the pair of forks.

When the first movable arc contactor 46 and the second movable arc contactor 54 come into contact with each other during the closing operation of the gas insulated breaker 40, the second lever 64 allows the second movable arc contactor 54 to maintain contact. The lock mechanism for fixing () is included in the present invention.

Here, the reason why the second movable arc contactor 54 needs a means for maintaining contact is because the second movable arc contactor 54 is linearly movable through the through-hole so that the first movable arc without the contact holding means. When the contactor 46 and the second movable arc contactor 54 make contact, the second movable arc contactor 54 retreats back by the contact force of the first movable arc contactor 46 and thus the first movable arc contactor 46. This is because contact for energization between the second movable arc contactor 54 and the second movable arc contactor 54 is unstable or unstable, and the arc arcing function due to the energization and separation due to contact between them cannot be performed.

The lock mechanism includes a lock pin 72, the lock pin 72 is installed on the first link 56 of the link mechanism LK and linearly movable together with the first link 56, and gas insulated. A moment in one direction is applied to the second lever 64 during the closing operation of the breaker 40.

Here, one direction means a direction in which the second lever 64 biases the second movable arc contactor 54 toward the first movable arc contactor 46, that is, an anti-clockwise direction.

More preferably, the lock mechanism is formed on one side of the second lever 64 (the surface facing the driving side), so that the lock pin 72 is moved to the second lever during the closing operation of the gas insulation breaker 40. It may include a seating groove (64c) for mounting when applying the moment in the one direction to (64).

The first stopper 76 is ring-shaped separate from the second movable arc contactor 54 fixedly on an end side near the end of the second movable arc contactor 54 connected with the second lever 64. A member, a pin, or the like is provided or a protrusion is integrally formed with the second movable arc contactor 54, and the second lever 64 is rotated in one direction (counterclockwise) during the closing operation of the gas insulated circuit breaker 40. The second movable main contactor 52 is in contact with the rear surface of the second movable main contactor 52 to limit the movement of the second movable arc contactor 54 which moves linearly according to the rotation of the second lever 64.

The link support 43a included in the gas insulated breaker 40 of the present invention is fixedly installed in the second fixed cylinder 43 to guide and support the movement of the first link 56.

The second stopper 74 is fixed to a side opposite to the side of the first link 56 connected to the nozzle 50, and moves to move with the nozzle 50 in contact with the link support 43a during the trip operation. Limit the movement of the link 56.

On the other hand, reference numeral 78 is additionally included in the gas insulated circuit breaker 40 of the present invention, one end of the second movable for the energized contact between the second movable main contact 52 and the second movable arc contact 54 It is fixed on the main contactor 52 and the other end is a conductive contact chip 78 which is installed in contact with the second movable arc contactor.

Referring to FIGS. 4A to 4D, the operation of the triple insulated gas insulated circuit breaker according to the present invention having the above-described configuration will be described below with reference to FIGS. 4A to 4D.

Figure 4a is an operating state diagram showing the operating state of the gas insulated breaker according to the present invention in the initial closing position (state). In the closing state as shown in FIG. 4A, the nozzle 50 moves toward the driven side, that is, moves to the left in the drawing, and the first link 56 also moves in the same direction as the nozzle 50.

At this time, the first lever 60, one end of which is connected to the first link 56 by the connecting pin, rotates in the counterclockwise direction on the fixed rotation axis. Accordingly, as shown in the drawing, the first lever 60 is rotated counterclockwise around the fixed rotational axis and is inclined to the left in the drawing. At this time, the other end in the longitudinal direction of the first lever 60 is provided. The connected second link 58 linearly moves in the direction opposite to the movement direction of the nozzle 50 and the first link 56, that is, in the right direction on the drawing.

The second movable main contactor 52 connected to the second link 58 by moving in the right direction on the drawing of the second link 58 is also opposite to the moving direction of the nozzle 50 and the first link 56. Direction, that is, linear movement in the right direction on the drawing. Therefore, the first movable main contactor 42 and the second movable main contactor 52 which are advanced in the same direction as the nozzle 50 are in mechanical contact, and the two contactors 42 and 52 made of a conductive material are electrically It is energized with each other.

At this time, the second lever 64 is pressed to rotate counterclockwise by the lock pin 72 on the first link 56 which moves linearly in the left direction, and thus is connected to the second lever 64. The movable arc contact 54 is pushed from the second lever 64 to move toward the first movable arc contact 46. In this way, while the second lever 64 pushes the second movable arc contactor 54 toward the first movable arc contactor 46, the first movable arc contactor 46 and the second movable arc contactor 54 mutually support each other. It comes into contact with and keeps contact.

In the closing state as shown in FIG. 4A, a cylinder rod 48 connected to an external not shown actuator for the interruption, that is, tripping of the circuit between the power supply side and the load side due to the occurrence of the fault current is shown in FIG. 4B in the direction of the arrow. As shown in the figure, when the linear movement is performed, the compression cylinder 44 connected to the cylinder rod 48 by the connecting means (not shown) moves in the same arrow direction as that of the cylinder rod 48, that is, to the right in the drawing, and the compression cylinder ( The first movable main contactor 42 connected to the distal end of 44 and the nozzle 50 connected to the distal end of the first movable main contactor 42 also move in the same direction as the moving direction of the cylinder rod 48. In accordance with the linear movement of the nozzle 50 in the right direction, the first link 56 of the driven mechanism linkage LK connected to the nozzle 50 also moves linearly in the same direction as the nozzle 50. According to the linear movement in the same direction as the nozzle 50 of the first link 56, the first lever 60 is rotated clockwise about the fixed rotational axis to be upright as shown in FIG. 4B. The second link 58 connected to the lever 60 is pulled to move to the left in the drawing opposite to the moving direction of the nozzle 50. Accordingly, the second movable main contactor 52 connected to the other end of the second link 58 is mechanically separated from the first movable main contactor 42 and thus electrically disconnected from each other. At this time, since the first movable arc contactor 46 and the second movable arc contactor 54 are still in contact with each other and are energized, an arc is generated when the first movable main contactor 42 and the second movable main contactor 52 are separated. I never do that.

At this time, in accordance with the movement in the same direction as the nozzle 50 of the first link 56, the drive member 70 installed in the first link 56 also moves in the right direction in the same direction, as shown in Figure 4b Likewise, the driving member 70 is positioned in the recess 64b between the fork portions 64a of the second lever 64 to be in contact with the fork portion 64a.

At the same time, the compression chamber C is compressed according to the linear movement of the compression cylinder 44 and the cylinder rod 48 to the left side in the drawing with respect to the fixed piston 41a, and the arc extinguishing gas in the compression chamber C is connected to the nozzle 50. ) Is ready to be sprayed through.

On the other hand, when the cylinder rod 48 is further moved in the direction of the arrow as shown in Fig. 4C, the compression cylinder 44 connected by the connecting means not shown to the cylinder rod 48 is the cylinder rod 48. The first movable main contactor 42 connected to the front end of the compression cylinder 44 and the nozzle 50 connected to the front end of the first movable main contactor 42 moving in the direction of an arrow as shown in FIG. Also, the cylinder rod 48 is further linearly moved in the same direction as the moving direction. In accordance with the linear movement of the nozzle 50 in the right direction, the first link 56 of the driven mechanism linkage LK connected to the nozzle 50 is further linearly moved in the same direction as the nozzle 50. As the first lever 60 is further rotated clockwise about the fixed rotational axis as the nozzle 50 of the first link 56 moves in the same direction, it is inclined to the right as shown in FIG. 4C. Then, the second link 58 connected to the first lever 60 is further pulled to move to the left in the drawing opposite to the moving direction of the nozzle 50. Therefore, the second movable main contactor 52 connected to the other end of the second link 58 is further separated from the first movable main contactor 42.

At this time, in accordance with the movement in the same direction as the nozzle 50 of the first link 56, the drive member 70 installed in the first link 56 is also moved further in the right direction in the same direction, as shown in Figure 4c As described above, the driving member 70 presses the fork 64a of the second lever 64 so that the second lever 64 rotates clockwise in the drawing about the fixed rotation shaft 68.

Since the second lever 64 is shorter in length than the first lever 60, the second movable arc contactor 54 is faster than the moving speed of the second movable main contactor 52. ), And moves in a direction opposite to the moving direction of the first movable arc contactor 46.

At the same time, the arc extinguishing gas in the compression chamber C is injected toward the second movable arc contactor 54 through the nozzle 50 and is generated between the first movable arc contactor 46 and the second movable arc contactor 54. The arc is quickly extinguished.

On the other hand, if the cylinder rod 48 further moves linearly in the direction of the arrow as shown in Fig. 4D, the compression cylinder 44 connected to the cylinder rod 48 by the connecting means not shown is the cylinder rod 48. The first movable main contactor 42 connected to the front end of the compression cylinder 44 and the nozzle 50 connected to the front end of the first movable main contactor 42 further moving in the direction of an arrow, that is, to the right in the drawing. ) Also moves further linearly in the same direction as the moving direction of the cylinder rod 48. In accordance with the linear movement of the nozzle 50 in the right direction, the first link 56 of the driven mechanism linkage LK connected to the nozzle 50 is further linearly moved in the same direction as the nozzle 50. As the first lever 60 is further rotated clockwise around the fixed rotation axis as the nozzle 50 of the first link 56 moves in the same direction, the state is further tilted to the right as shown in FIG. 4D. The second link 58 connected to the first lever 60 is further pulled to move to the left in the drawing opposite to the moving direction of the nozzle 50. Therefore, the second movable main contactor 52 connected to the other end of the second link 58 is further separated from the first movable main contactor 42.

At this time, in accordance with the movement in the same direction as the nozzle 50 of the first link 56, the drive member 70 installed in the first link 56 is also moved further in the right direction in the same direction, as shown in Figure 4d As described above, the driving member 70 presses the fork 64a of the second lever 64 so that the second lever 64 is further rotated in a clockwise direction about the fixed rotation shaft 68.

Here, the second movable arc contact 54 is opposite to the moving direction of the first movable arc contact 46 so as to be farther from the first movable arc contact 46 than the moving speed of the second movable main contact 52. Go to.

The movement of the first link 56 in the right direction on the drawing in the same direction as the nozzle 50 is stopped by the second stopper 74 touching the link support 43a. The movement or rotation of the other parts is then stopped.

Those skilled in the art should understand that the present invention can be implemented in other specific forms without changing the technical spirit or essential features of the present invention. Therefore, it should be understood that the embodiments described above are exemplary in all respects and not restrictive. The scope of the invention is indicated by the following claims rather than the above description, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included in the scope of the invention. do.

As described above, according to the present invention, the link is connected to the nozzle so that the main contactors on the driving side and the driven side move in the direction of contacting or separating from each other at the same time, and the movable arc contactor on the driving side moves on the driven side. When the arc contact is separated from the arc contact, the contact is made faster than the main contact, thereby reducing the arc generation time, thereby improving the arc extinguishing performance and the breaking performance.

In addition, according to the present invention, the second movable arc contactor and the first link are respectively provided with a stopper for limiting over-movement at closing or limiting over-movement at breaking (trip), and thus over-operation when the breaker is tripped. It can be prevented, and there is an effect that can prevent over-injection.

Claims (8)

A first stationary cylinder, a second stationary cylinder spaced apart from the first stationary cylinder by a predetermined distance, a cylinder rod linearly driven in the first stationary cylinder, and a cylinder rod connected to the cylinder rod in a first stationary cylinder. A compression cylinder which is linearly movable in the same direction as the movement direction of the rod, a first movable arc contactor connected to the distal end of the cylinder rod and linearly movable together in the same direction as the cylinder rod in a first fixed cylinder, and the cylinder rod And a compression chamber of SOHO gas which is compressed or expanded in accordance with the movement of the compression cylinder, a first movable main contactor connected to the front end of the compression cylinder, and a first movable main contactor connected to the front end of the first movable main contactor. A nozzle capable of linearly moving and injecting the arc extinguished gas compressed in the compression chamber during the blocking operation; It is in the gas-insulated circuit breaker having a move in the opposite direction to the first straight line in the second fixed cylinder to a position in contact with or separate the movable main contact moves a movable second movable main contacts of the nozzle inside, A link mechanism connected between the nozzle and the second movable main contactor to redirect the linear driving force from the nozzle in a direction opposite to the moving direction of the nozzle to provide to the second movable main contactor, the drive mechanism being connected to the nozzle A first link linearly moving in the same direction as the nozzle, a second link drive-connected to a second movable main contactor and moving in a direction opposite to the nozzle, and drive-connected and fixed between the first link and the second link The link mechanism rotatable about a rotation axis, the link mechanism including a first lever for turning the linear power from the first link in the opposite direction and providing the second link to the second link; One end portion displaceable to a position in driving contact with the link mechanism and a position separate from the link mechanism, rotatable about a fixed rotational axis when driving contact with the link mechanism, and a moving speed of the second movable arc contactor A second lever shorter in length than the first lever to be faster than the moving speed of the second movable main contactor; One end thereof is connected to the other end of the second lever and extends through the second movable main contact while being guided and supported to be linearly moved by the second movable main contactor so that the first movable arc contactor is rotated according to the rotation of the second lever. And a second movable arc contactor linearly movable to a position in contact with or separated from the first movable arc contactor. The method of claim 1, A drive member installed on the first link of the link mechanism and linearly movable with the first link; And a fork portion which is formed at one end of the second lever and is displaceable to a position contacting the drive member of the link mechanism and a position separated from the drive member of the link mechanism. . The method of claim 1, And a lock mechanism for positioning the second lever so that the second movable arc contactor maintains contact when the first movable arc contactor contacts the second movable arc contactor during the closing operation of the gas insulated circuit breaker. Gas insulated circuit breaker. The method of claim 3, wherein the lock mechanism, Gas insulation, characterized in that it is installed on the first link of the link mechanism and linearly moveable with the first link, the lock pin for applying a moment in one direction to the second lever during the closing operation of the gas insulated circuit breaker. breaker. The method of claim 4, wherein the lock mechanism, And a seating groove formed on one side of the second lever and seated when the lock pin applies a moment in one direction to the second lever during the closing operation of the gas insulated circuit breaker. 2. The method of claim 1, wherein the second movable arc contactor is fixedly mounted on the second movable arc contactor, and is in contact with the second movable main contactor when the second lever rotates in one direction during the closing operation of the gas insulated circuit breaker. And a first stopper for limiting the movement of the second movable arc contactor moving linearly along the gas insulated circuit breaker. The method of claim 1, A link support fixedly installed in the second fixed cylinder to guide and support the movement of the first link; And a second stopper fixedly installed on an opposite side of the first link connected to the nozzle, the second stopper contacting the link support and limiting the movement of the first link moving together with the nozzle during a trip operation. Gas insulated circuit breaker. The method of claim 1, For the energized contact between the second movable main contactor and the second movable arc contactor, one end is fixed on the second movable main contactor, and the other end further includes a conductive contact piece contacting the second movable arc contactor. Gas insulated circuit breaker.

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