JP2021072163A - Gas circuit breaker - Google Patents

Abstract

To provide a spring operation mechanism that is intended to be miniaturized even when operation energy increases.SOLUTION: A gas circuit breaker includes at least a grounding container in which an insulating gas is sealed and a circuit breaker having a fixed contact and a movable contact is incorporated. The gas circuit breaker further comprises, a spring operation mechanism using, as a drive source, a closing spring and a cutoff spring for opening or closing the movable contact for the fixed contact, a link mechanism for connecting the spring operation mechanism and the movable contact, and a cam for converting the driving force of the closing spring into force for compressing the cutoff spring. The spring operation mechanism includes a tripping mechanism that holds and releases the driving force of a main shaft of the spring operation mechanism and the cutoff spring, and a closing control mechanism that holds and releases the driving force of the cam shaft and the closing spring. The tripping mechanism is accommodated in a small housing, and the closing control mechanism is accommodated in a large housing larger than the small housing, and the small housing is arranged inside the large housing.SELECTED DRAWING: Figure 2

Description

The present invention relates to a gas circuit breaker, and relates to a gas circuit breaker suitable for, for example, a circuit breaker for high-voltage power such as a substation or a switchyard.

Patent Document 1 describes a gas circuit breaker for electric power provided in a substation or a switchyard, which uses a spring operation mechanism that uses a spring to drive the power to be cut off and turned on.

The gas circuit breaker using the spring operation mechanism of Patent Document 1 includes a gas circuit breaker having different circuit breakers such as 2-cycle circuit breaker, 3-cycle circuit breaker, or 5-cycle circuit breaker by simply replacing the tripping operation unit. It is described that it can be easily manufactured, and that it is possible to easily switch between two cycles and three cycles of shutoff time with one gas circuit breaker by exchanging the tripping operation unit. There is.

Japanese Patent No. 4833739

However, Patent Document 1 described above describes a gas circuit breaker capable of realizing different shutoff times such as 2-cycle shutoff or 3-cycle breaker simply by exchanging the tripping operation unit. The small housing for accommodating the tripping operation unit in the described spring operation mechanism is arranged outside the large housing, and there is a problem that the small housing becomes large as the operating energy of the gas circuit breaker increases. ..

The present invention has been made in view of the above points, and an object of the present invention is to provide a gas circuit breaker capable of downsizing the spring operation mechanism even when the operation energy becomes large.

In the gas breaker of the present invention, in order to achieve the above object, an insulating gas is sealed inside, and a grounding container having a built-in breaking portion having a fixed contact and a movable contact and the movable contact are fixed. A spring operating mechanism using a closing spring and a closing spring for opening or closing the pole with respect to the contact, a link mechanism for connecting the spring operating mechanism and the movable contact, and driving of the closing spring. The spring operating mechanism includes at least a cam that converts a force into a force that compresses the breaking spring, and the spring operating mechanism includes a main shaft of the spring operating mechanism, a tripping mechanism that holds and releases the driving force of the breaking spring, and a shaft of the cam. It is composed of a closing control mechanism that holds and releases the driving force of the closing spring, the tripping mechanism is housed in a small housing, and the closing control mechanism is housed in a large housing that is larger than the small housing. The gas breaker is characterized in that the small housing is arranged inside the large housing.

According to the present invention, the spring operating mechanism can be miniaturized even if the operating energy is increased.

It is a schematic side view which shows the whole structure of Example 1 of the gas circuit breaker of this invention by breaking a part. It is a side view which shows the main part of the spring operation mechanism in Example 1 of the gas circuit breaker of this invention. It is a side view which omitted the small housing and the large housing in the spring operation mechanism shown in FIG. It is a figure explaining the operation of the spring operation mechanism in Example 1 of the gas circuit breaker of this invention, and is the figure which shows the compressed state in both the breaking spring and the closing spring. It is a figure explaining the operation of the spring operation mechanism in Example 1 of the gas circuit breaker of this invention, and is the figure which shows the opening state of the breaking spring. It is a figure explaining the operation of the spring operation mechanism in Example 1 of the gas circuit breaker of this invention, and is the figure which shows the closing spring in a compressed state while the closing spring is in an open state.

Hereinafter, the gas circuit breaker of the present invention will be described based on the illustrated examples. In each figure, the same reference numerals are used for the same components.

FIG. 1 shows the overall configuration of Example 1 of the gas circuit breaker of the present invention with a partial break.

In the gas circuit breaker 100 of the present embodiment shown in the figure, a cylindrical grounding container 103 is installed on a gantry 105, and the grounding container 103 contains, for example, SF6 gas (sulfur hexafluoride gas) as an insulating gas. It is sealed at the specified pressure. Further, bushings 101 and 102 are provided diagonally upward from the grounding container 103, and conductors (not shown) are housed in the bushings 101 and 102. An operation box 104 for accommodating the spring operation mechanism 400 is attached to the side portion of the gantry 105.

Further, in the grounding container 103, an opening / closing contact composed of a fixed contact 62 and a movable contact 63 is provided. FIG. 1 shows a state in which the opening / closing contact is turned on, and the movable contact 63 is in contact with the fixed contact 62.

Further, when the gas circuit breaker 100 is shut off, the movable contact 63 is separated from the fixed contact 62 by a predetermined distance. The movable contact 63 is connected to an insulating link 64 whose contact end opposite to that of the fixed contact 62 is made of an insulating material.

Further, a rotating shaft 66 is rotatably supported in the grounding container 103, and one ends of the first link 65 and the second link 67 are fixed to the rotating shaft 66. Although not shown, the first link 65 and the second link 67 are fixed to the rotating shaft 66 on different surfaces, and the first link 65 is provided in the grounding container 103, but the second link 65 is provided. Link 67 is provided in the atmosphere. That is, the airtightness of the gas in the grounding container 103 is maintained by the rotating shaft 66. One end of the insulating link 64 is connected to one end of the first link 65 in the grounding container 103. Further, one end of the second link 67 in the atmosphere is connected to one end of the third link 68 which is also in the atmosphere.

Further, a spindle 4 of the spring operation mechanism 400 is provided in the operation box 104. One end of the fourth link 69 is fixed to the main shaft 4, and the other end of the fourth link 69 is connected to the third link 68. A four-section link mechanism is formed by the main shaft 4, the fourth link 69, the third link 68, the second link 67, and the rotating shaft 66.

As a result, the spring operating mechanism 400 and the opening / closing contact (fixed contact 62 and movable contact 63) are mechanically connected.

The outline of the operation of the gas circuit breaker 100 configured as described above will be described below. The behavior of the spring operating mechanism 400 will be described separately.

In the normal state, electricity flows from the electric circuit in the substation or the switchyard via the bushing 102, and the gas circuit breaker 100 is supplied to the system via the bushing 101.

When an accident occurs in the system due to a lightning strike or the like, an opening command is input from the command center to the gas circuit breaker 100, and the spring operation mechanism 400 in the operation box 104 is driven to rotate the spindle 4 counterclockwise, as described above. By separating the movable contact 63 from the fixed contact 62 via a four-bar link mechanism consisting of the main shaft 4, the fourth link 69, the third link 68, the second link 67, and the rotating shaft 66, the movable contact 63 is moved to the downstream side. Cut off the power supply.

When the system accident is eliminated, a circuit breaker command is input from the command center to the gas circuit breaker 100, the spring operation mechanism 400 is driven to rotate the spindle 4 clockwise to operate the link mechanism, and the movable contact 63 Is brought into contact with the fixed contactor 62 to bring in the contact.

In this embodiment, the grounding container 103 extends in the horizontal direction, but it may extend in the vertical direction. Further, in this practical example, a single gas circuit breaker 100 in which the bushings 101 and 102 are directly attached to the grounding container 103 will be described, but there is no bushing 101 and 102, and the electric circuit is configured by the conductor. It may be a circuit breaker in the device.

Next, the configuration of the spring operation mechanism 400 in the gas circuit breaker of this embodiment will be described with reference to FIGS. 2 and 3. Note that FIG. 2 shows a state in which the small housing 61 and mechanical parts are attached to the large housing 1, and FIG. 3 omits the illustration of the large housing 1 and the small housing 61.

As shown in FIG. 2, the spring operation mechanism 400 in the gas breaker 100 of this embodiment has a trip mechanism 401 that holds and releases the driving force of the main shaft 4 and the cutoff spring 26 of the spring operation mechanism 400, and a cam of the cam 3. The large housing is composed of a closing control mechanism 402 that holds and releases the driving force of the shaft 2 and the closing spring 28, the tripping mechanism 401 is inside the small housing 61, and the closing control mechanism 402 is larger than the small housing 61. Each is housed in 1, and the small housing 61 is arranged inside the large housing 1.

The small housing 61 is fixed by two surfaces orthogonal to the large housing 1, that is, two mounting surfaces 61a and 61b, and the fixing is performed by, for example, bolting.

The two surfaces orthogonal to the large housing 1 to which the small housing 61 is fixed, that is, the two mounting surfaces 61a and 61b, are in the axial direction of the main shaft 4 of the spring operation mechanism 400 (perpendicular to the paper surface). The mounting surface 61b is perpendicular to the direction (horizontal direction) and the mounting surface 61a is in the same direction as the axial direction of the main shaft 4 (direction perpendicular to the paper surface). It projects in the same direction as the axial direction of the spindle 4 of the spring operating mechanism 400 (direction perpendicular to the paper surface), and the axial direction of the spindle 4 of the spring operating mechanism 400 of the protruding portion 1A (direction perpendicular to the paper surface). ), The small housing 61 is installed on the mounting surface 1b perpendicular to (horizontal direction).

Further, in this embodiment, as shown in FIG. 3, the shape of each lever of the trip mechanism 401 is different from that of the prior art, but the number of parts is the same, and the cutoff latch 8 and the second trigger lever 11 of the prior art are Although it was substantially Y-shaped, in this embodiment, it is reduced in size by making it substantially L-shaped.

According to this embodiment, since the small housing 61 is arranged inside the large housing 1 without providing the small housing 61 on the outside of the large housing 1, the operation shown in FIG. 1 is performed. The box 104 can be miniaturized, and the spring operating mechanism 400 can be miniaturized.

Further, since the small housing 61 is fixed to the large housing 1 by the two mounting surfaces 61a and 61b, the natural frequency for bending and vibrating the small housing 61 is higher than that in the conventional technique.

As a result, even if the impact at the end of the closing operation is transmitted to the small housing 61, the vibration of the second trigger lever 11 and the cutoff trigger 14 is reduced, and the engagement between each roller and the lever is immediately settled. It is possible to stably perform the shutoff operation after the closing operation is completed.

Next, the operation of the spring operating mechanism 400 of the present embodiment shown in FIGS. 2 and 3 to be housed in the operation box 104 shown in FIG. 1 will be described with reference to FIGS. 4, 5 and 6.

FIG. 4 shows a state in which both the closing spring 28 and the blocking spring 26 of the spring operating mechanism 400 are compressed, and at this time, the opening / closing contact shown in FIG. 1 is in the closing state. FIG. 5 shows a state in which a circuit breaker command is input to the gas circuit breaker 100, the spring operation mechanism 400 performs a circuit breaker operation, and the circuit breaker spring 26 is released. At this time, the open / close contact shown in FIG. 1 is in the circuit breaker state. It is in. FIG. 6 shows a state in which a closing command is input to the gas circuit breaker 100, the spring operating mechanism 400 performs a closing operation to release the closing spring 28, and the shutoff spring 26 is compressed. At this time, FIG. The open / close contact indicated by is in the closed state. After the state shown in FIG. 6, the closing spring 28 is compressed to return to the state shown in FIG.

As shown in FIGS. 4, 5 and 6, the housing to which the parts of the spring operation mechanism 400 are attached is composed of the large housing 1 and the small housing 61 as described above, and the small housing 61 is composed of the large housing 1 and the small housing 61. Arranged inside the large housing 1, the small housing 61 is fixed by two surfaces orthogonal to the large housing 1, that is, two mounting surfaces 61a and 61b. The fixation is made, for example, with bolts.

The spring operating mechanism 400 includes a tripping mechanism 401 that holds and releases the driving force of the spindle 4 and the shutoff spring 26, a closing control mechanism 402 that holds and releases the driving force of the camshaft 2 and the closing spring 28, and the like.

Next, the structure around the closing spring 28 and the closing control mechanism 402 will be described with reference to FIG.

As shown in FIG. 4, a cam 3 is attached to one end of a cam shaft 2 rotatably supported in the large housing 1, and a large gear 52 is attached to the other end. A spring receiver 35 is attached to the other end of the closing spring link 27 to hold one end side of the closing spring 28. The closing spring 28 is arranged on the outer periphery of the closing spring link 27, and the opposite side of the spring receiving 35 is held by the large housing 1.

Next, the structure of the closing control mechanism 402 will be described.

The closing control mechanism 402 is provided with a closing latch 19 so as to be engaged with the cam roller 18 attached to the cam 3. The throw-in latch 19 is rotatably supported, and a throw-in latch roller 21 is attached to the side opposite to the engaging portion of the throw-in latch 19 with the cam roller 18.

The charging latch roller 21 is arranged so as to be in contact with the charging trigger 22. The closing trigger 22 is rotatably attached to the large housing 1. A plunger of the closing solenoid 301 is arranged so as to come into contact with the closing trigger 22.

The structure around the cutoff spring 26 and the structure of the tripping mechanism 401 will be described with reference to FIG.

As shown in FIG. 4, an intermediate portion of a substantially Y-shaped main lever 5 is attached to the main shaft 4 of the spring operation mechanism 400, and a first main lever roller is attached to two ends of the main lever 5. 6 and a second main lever roller 7 are attached.

Further, one end of the blocking spring link 25 is rotatably attached to the remaining end of the main lever 5 via a pin. A flange 34 is attached to the other end of the cutoff spring link 25 to hold the cutoff spring 26 arranged on the outer periphery of the cutoff spring link 25.

The blocking spring 26 is held by the large housing 1 on the opposite side of the end portion held by the flange 34. The breaking spring 26 transfers the movable contact 63 from the fixed contact 62 via a four-node link mechanism including the main shaft 4, the fourth link 69, the third link 68, the second link 67, and the rotating shaft 66 described above. The structure is such that a driving force is applied in the pulling direction.

A shutoff latch 8 is rotatably attached to the large housing 1. The slope formed at one end of the cutoff latch 8 is engaged with the second main lever roller 7 provided at one end of the main lever 5, and the cutoff latch roller 10 is attached to the other end of the cutoff latch 8. Is installed. Further, one end of a return spring (not shown) that returns the cutoff latch 8 to the original position after the cutoff operation is attached to the cutoff latch 8. The other end of the return spring is fixed to the large housing 1.

The second trigger lever 11 is arranged so as to be engaged with the breaking latch roller 10 provided at one end of the breaking latch 8. The second trigger lever 11 is rotatably attached to a shaft supported by the small housing 61. Further, the second trigger lever 11 is attached with one end of a return spring (not shown) that returns to the original position after the shutoff operation.

The second trigger lever roller 13 is attached to the opposite end where the second trigger lever 11 engages with the shutoff latch roller 10. A substantially L-shaped shutoff trigger 14 that can be engaged with the second trigger lever roller 13 is arranged so that its tip end abuts on the second trigger lever roller 13.

The tip of the cutoff trigger 14 is formed on a curved surface. The cutoff trigger 14 is rotatably supported by the small housing 61. A plunger of the tripping solenoid 201 is arranged so as to come into contact with the shutoff trigger 14. Further, at the intermediate portion of the cutoff trigger 14, one end is fixed to the small housing 61, and a return spring (not shown) for returning the cutoff trigger 14 to the original position is attached.

In this embodiment, these return springs are coil springs, but other springs such as torsion coil springs and disc springs may be used.

In this way, the cutoff latch 8 forms a latch mechanism for holding the compressed state of the cutoff spring 26. Then, the compressed state of the shutoff spring 26 is released by the second trigger lever 11, the shutoff trigger 14, the tripping solenoid 201, and the like.

The operating principle of the gas circuit breaker 100 of this embodiment configured as described above will be described below.

First, the operation of the gas circuit breaker 100 shown in FIG. 4 shifting from the closed state to the shutoff state shown in FIG. 5 will be described.

When a shutoff command is input while the gas breaker 100 is turned on, the gas breaker 100 starts a shutoff operation. The tripping solenoid 201 of the tripping operation mechanism 401 is excited, and the plunger protrudes upward to press the shutoff trigger 14. As a result, the cutoff trigger 14 and the second trigger lever 11 are disengaged.

When the engagement with the cutoff trigger 14 is disengaged and the second trigger lever 11 becomes free to rotate, the second trigger lever 11 is pressed by the cutoff latch roller 10 and rotates counterclockwise. Next, since the shutoff latch 8 whose rotation is restricted also becomes free to rotate, the shutoff latch 8 rotates counterclockwise due to the pressing force from the second main lever roller 7 of the main lever 5.

Then, when the engagement between the second main lever roller 7 of the main lever 5 and the shutoff latch 8 is disengaged, the main lever 5 becomes free to rotate. Then, the breaking spring 26 in the compressed state begins to be released, and the main lever 5 rotates counterclockwise.

As a result, the opening / closing contact (fixed contact 62 and movable contact 63) is formed by a four-node link mechanism including the main shaft 4 and the fourth link 69, the third link 68, the second link 67, and the rotating shaft 66. The shutoff operation is performed. When the shutoff spring 26 is completely released, the shutoff operation ends, and the first main lever roller 6 of the main lever 5 substantially abuts on the outer peripheral surface of the cam 3 and stops, as shown in FIG.

Next, the operation of the spring operation mechanism 400 until the opening / closing contact of the gas circuit breaker 100 shifts from the shutoff state to the closing state will be described.

When a closing command is input to the gas circuit breaker 100 in the shut-off state of the gas circuit breaker 100 shown in FIG. 5, the charging solenoid 301 is excited. The plunger of the closing solenoid 301 protrudes downward and presses the closing trigger 22. Then, the closing trigger 22 rotates counterclockwise, and the engagement between the closing trigger 22 and the closing latch roller 21 is released.

The closing latch 19 whose rotation is restricted becomes free to rotate, and the closing latch 19 rotates counterclockwise due to the pressing force from the cam roller 18 of the cam 3. Then, the engagement between the closing latch 19 and the cam roller 18 is released. Since the restriction on the rotation of the cam 3 is removed, the spring force of the closing spring 28 is released, the closing spring link 27 moves downward, and the large gear 52, the cam shaft 2 and the cam 3 rotate counterclockwise. start.

As the cam 3 rotates, the outer peripheral surface of the cam 3 comes into contact with the first main lever roller 6 of the main lever 5, and the main lever 5 rotates clockwise. When the cam 3 rotates substantially half a turn, the outer peripheral surface of the cam 3 comes into contact with the first main lever roller 6 of the main lever 5 at the maximum radius of curvature portion of the cam 3. At this time, the cutoff spring link 25 connected to the main lever 5 compresses the cutoff spring 26 to a substantially original position. When the closing spring 28 is fully released, the opening / closing contact (fixed contact 62 and movable contact 63) shown in FIG. 1 is pushed.

At the end of the closing operation, the breaking latch 8, the second trigger lever 11, and the breaking trigger 14 of the pulling mechanism 401 are returned to their original positions by the force of the return spring.

After that, as shown in FIG. 6, the driving force a0 of the breaking spring 26 is transmitted to the breaking latch 8, the second trigger lever 11, and the breaking trigger 14 as the driving forces a1, a2, and a3. At this time, since an impact acts between each roller and the cutoff latch 8, the second trigger lever 11, and the cutoff trigger 14, an impact load also acts on the large housing 1 and the small housing 61.

In the operation duty of the gas circuit breaker 100, since it is the duty to start the shutoff operation immediately after the closing operation is completed, the relationship between each of the above rollers and the shutoff latch 8, the second trigger lever 11, and the shutoff trigger 14 is immediately statically indeterminate. It is desirable to prepare for the shutoff operation.

After the closing operation is completed, the large gear 52 is rotated counterclockwise by the electric motor and the gear train (not shown), so that the closing spring link 27 swings counterclockwise and the closing spring 28 is compressed. .. When the large gear 52 has passed almost half a turn, the electric motor is stopped by a command of a limit switch (not shown).

The large gear 52 tries to rotate further counterclockwise due to the driving force of the compressed closing spring 28, but the cam roller 18 of the cam 3 coaxial with the large gear 52 is sent to the closing latch 19, and the closing latch 19 is triggered by the closing latch 19. Since they are engaged with the 22 respectively, the rotation of the cam 3 and the large gear 52 is prevented, and the spring force of the closing spring 28 is maintained.

As a result, as shown in FIG. 6, the opening / closing contact (fixed contact 62 and movable contact 63) is put into the closing state, and the blocking spring 26 and the closing spring 28 are returned to the compressed initial state.

The present invention is not limited to the above-described examples, and includes various modifications. For example, the above-described embodiment has been described in detail in order to explain the present invention in an easy-to-understand manner, and is not necessarily limited to those having all the described configurations. Further, it is possible to replace a part of the configuration of one embodiment with the configuration of another embodiment, and it is also possible to add the configuration of another embodiment to the configuration of one embodiment. Further, it is possible to add / delete / replace a part of the configuration of each embodiment with another configuration.

1 ... Large housing, 1A ... Large housing protrusion, 2 ... Cam shaft, 3 ... Cam, 4 ... Main shaft, 5 ... Main lever, 6 ... First main lever roller, 7 ... Second main lever Roller, 8 ... shutoff latch, 10 ... shutoff latch roller, 11 ... second trigger lever, 13 ... second trigger lever roller, 14 ... shutoff trigger, 18 ... cam roller, 19 ... throw-in latch, 21 ... throw-in Latch roller, 22 ... Input trigger, 25 ... Breaking spring link, 26 ... Breaking spring, 27 ... Input spring link, 28 ... Input spring, 34 ... Flange, 35 ... Spring receiver, 52 ... Large gear, 61 ... Small housing , 61a, 61b ... Mounting surface, 62 ... Fixed contact, 63 ... Movable contact, 64 ... Insulated link, 65 ... First link, 66 ... Rotating shaft, 67 ... Second link, 68 ... Third link , 69 ... 4th link, 100 ... Gas breaker, 101, 102 ... Bushing, 103 ... Grounding container, 104 ... Operation box, 105 ... Stand, 201 ... Detachable solenoid, 301 ... Input solenoid, 400 ... Spring operation mechanism , 401 ... Detachment mechanism, 402 ... Input control mechanism.

Claims (11)

An insulating gas is sealed inside, and a grounding container with a built-in blocking part having a fixed contact and a movable contact, an input spring for opening or closing the movable contact with respect to the fixed contact, and a closing spring. At least a spring operating mechanism using a breaking spring as a driving source, a link mechanism connecting the spring operating mechanism and the movable contactor, and a cam for converting the driving force of the closing spring into a force for compressing the breaking spring. Prepare,
The spring operating mechanism includes a tripping mechanism that holds and releases the driving force of the main shaft of the spring operating mechanism and the blocking spring, and a closing control mechanism that holds and releases the driving force of the cam shaft and the closing spring. The tripping mechanism is a gas breaker housed in a small housing, and the closing control mechanism is housed in a large housing larger than the small housing.
The small housing is a gas circuit breaker, characterized in that the small housing is arranged inside the large housing. The gas circuit breaker according to claim 1.
The small housing is a gas circuit breaker characterized in that it is fixed by two surfaces orthogonal to the large housing. The gas circuit breaker according to claim 2.
The two surfaces orthogonal to the large housing to which the small housing is fixed are a surface perpendicular to the axial direction of the main shaft of the spring operation mechanism and a surface in the same direction as the axial direction of the main shaft. A gas breaker characterized by that. The gas circuit breaker according to claim 3.
A part of the wall surface of the large housing projects in the same direction as the axial direction of the main shaft of the spring operating mechanism, and the small housing is on a surface of the protruding portion perpendicular to the axial direction of the main shaft of the spring operating mechanism. A gas circuit breaker characterized by being installed. The gas circuit breaker according to any one of claims 1 to 4.
The cam is attached to one end of a cam shaft rotatably supported in the large housing, a large gear is attached to the other end of the cam shaft, and the other end of the link of the input spring is attached. A spring receiver is attached, the spring receiver holds one end side of the input spring, and the input spring is arranged on the outer periphery of the link of the input spring, and the opposite side of the spring receiver is the large housing. A gas breaker characterized by being held by. The gas circuit breaker according to claim 5.
The closing control mechanism is provided with a rotatable closing latch that can be engaged with the cam roller attached to the cam, and is on the side opposite to the engaging portion of the closing latch with the cam roller. Is attached with a closing latch roller, the closing latch roller is arranged so as to be in contact with the closing trigger, and the closing trigger is rotatably attached to the large housing and attached to the closing trigger. A gas breaker characterized in that a plunger of a closing solenoid is arranged so that it can be contacted. The gas circuit breaker according to any one of claims 1 to 6.
An intermediate portion of a substantially Y-shaped main lever is attached to the main shaft of the spring operating mechanism, and a first main lever roller and a second main lever are attached to two ends of the substantially Y-shaped main lever. A roller for a lever is attached, and one end of the link of the blocking spring is rotatably attached to the remaining end of the main lever having a substantially Y shape via a pin, and the link of the blocking spring is attached. A flange is attached to the other end to hold the shutoff spring arranged on the outer periphery of the link of the cutoff spring, and the cutoff spring has the large housing on the opposite side of the end held by the flange. A gas breaker characterized by being held. The gas circuit breaker according to claim 7.
A shutoff latch is rotatably attached to the large housing, and a slope is formed at one end of the shutoff latch, and the slope is formed on the second main lever roller provided at one end of the main lever. On the other hand, a gas breaker characterized in that a roller for a cutoff latch is attached to the other end of the cutoff latch. The gas circuit breaker according to claim 8.
A second trigger lever is arranged so as to be engaged with the breaking latch roller provided at one end of the breaking latch, and the second trigger lever rotates on a shaft supported by the small housing. The second trigger lever is freely attached, and the second trigger lever roller is attached to the opposite end where the second trigger lever engages with the shutoff latch roller, and can be engaged with the second trigger lever roller. A gas breaker characterized in that a shutoff trigger is arranged so that its tip end abuts on the roller for the second trigger lever. The gas circuit breaker according to claim 9.
The tip of the cutoff trigger is formed on a curved surface, the cutoff trigger is rotatably supported by the small housing, and a plunger of a tripping solenoid is arranged so as to be in contact with the cutoff trigger. A gas circuit breaker characterized by being present. The gas circuit breaker according to claim 10.
The second trigger lever of the tripping mechanism is a gas circuit breaker characterized in that it is formed in a substantially L shape.

Images