JPH07182955A - Gas-blast circuit breaker with resistor - Google Patents

Abstract

PURPOSE:To provide a gas-blast circuit breaker with a resistor capable of contributing to the improvement of safety by more correctly driving a resistor cutoff part with an operating mechanism exerting high reliability with a simple structure. CONSTITUTION:A main cutoff part 2 and a resistor cutoff part 3 are arranged in a container 1. Individually rotatable first and second levers 61, 71 are arranged at the lower part of the container 1 so that their rotary shafts 60, 70 are made coaxial. The main cutoff part 2 is connected to the first lever 61, a main operating mechanism 5 is connected, the resistor cutoff part 3 is connected to the second lever 71, and a resistor side operating mechanism 4 is connected. A delay mechanism 41 is connected to the main operating mechanism 5 and the resistor side operating mechanism 4. A plurality of the first and second couplings 81, 82 are provided on the first and second levers 61, 71 respectively, and they are pressed and coupled with each other. The main cutoff part 2 and the resistor cutoff part 3 can be individually driven correctly.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas breaker with a resistance provided with a resistance breaker for suppressing a surge voltage generated when the breaker is opened and closed.

[0002]

2. Description of the Related Art Generally, when a circuit breaker is opened or closed, a surge voltage is generated in a power transmission line. In order to suppress this surge voltage, a circuit breaker with a resistor is used in which a resistance breaker having a resistance is provided in parallel with the main breaker. Such a circuit breaker with a resistor is used in a power system of 550 kV or less.
Normally, the surge voltage is suppressed only when the contact is closed. This is because the resistance cutoff portion closes the pole prior to the main cutoff portion to cause a current to flow through the resistance and suppress the surge voltage at the time of closing. Such a circuit breaker with a resistance has already been widely put into practical use.

By the way, due to the recent increase in power demand,
The capacity of substations is increasing steadily. In addition, it is becoming more difficult to build a power plant near the urban area, which is a large power consumption area. Under such circumstances, the transmission line tends to have a long distance, and the transmission system tends to have a high voltage in order to improve transmission efficiency. Therefore, a transmission system with a higher voltage such as 1100 kV is also planned.

The circuit breaker used in a system having a higher voltage such as 1100 kV is required to suppress the surge voltage both when it is closed and when it is opened. 550kV when closed
Surge voltage is suppressed in the same way as in the power system below, and when the contact is opened, the resistor breaker opens after the main breaker opens, causing a current to flow through the resistor, thereby suppressing surge voltage. . Therefore, in order to surely suppress the surge voltage, the resistance breaking unit is turned on about 10 ms earlier than the main breaking unit at closing, and the resistance breaking unit is more than tens of ms more than the main breaking unit at opening. A very complicated operation of opening the contacts with a delay is required.

In order to realize such a complicated operation,
A gas circuit breaker with resistance as shown in FIGS. 6 to 7 is provided. FIG. 6 shows a closed state and FIG. 7 shows an opened state. In the container 1 in which the insulating gas 8 is sealed and hermetically sealed, two sets of the main breaking unit 2 and the resistance breaking unit 3 are provided, and two sets are provided. It is a gas circuit breaker with resistance. Further, in each drawing, only one of the two sets (left side in the drawing) of the main cutoff portion 2 and the resistance cutoff portion 3 is shown, and the other (right side in the drawing) having the same configuration is shown for simplification of the drawing. , Not shown here.

That is, inside the container 1, the main cutoff portion 2 is arranged in the axial direction of the container 1. This main blocking unit 2
A movable contact 22 is provided at the tip of the puffer cylinder 21, and an insulating nozzle 23 is provided on the outer peripheral side thereof.
Further, a fixed contact 25 is provided facing the movable contact 22, and an energization contact 26 is provided on the outer peripheral side of the fixed contact 25.

Further, the puffer piston 27 on which the puffer cylinder 21 slides while being joined to the outer peripheral surface thereof is
The puffer chamber 28 is fixed to the supporting insulating cylinder 9, and the space surrounded by the puffer piston 27 and the puffer cylinder 21 is a puffer chamber 28.

The puffer cylinder 21 is connected to the main disconnecting section connecting mechanism 6 via a connecting rod 24, and the main operating mechanism provided in the mechanism box 13 outside the container 2 via the main disconnecting section connecting mechanism 6. Connected to 5. The puffer cylinder 21 is driven by the driving force of the main operating mechanism 5.
Are configured to be driven in the left-right direction in the figure. In addition, the main cutoff portion connecting mechanism 6 applies the driving force of the rod 5 a provided in the main operating mechanism 5 in the left-right direction in the drawing to the connecting rod 24.
6b that moves vertically in the figure in order to be transmitted to
And an insulating rod 6c. Further, in order to convert the driving force to the orthogonal direction, the rod 5a and the rod 6
There is provided a first lever for connecting b, and rotary levers 6d, 6e for connecting the insulating rod 6c and the connecting rod 24.

Further, inside the container 1, the main shutoff portion 2 is provided.
A resistance cutoff unit 3 is provided in parallel with. The resistance breaking unit 3 is composed of a movable resistance contact 31 and a fixed resistance contact 35 provided opposite to the movable resistance contact 31. The movable resistance contact 31 has the wipe spring 3 provided therein.
2 is provided, and at one end of the wipe spring 32, a piston 33 that slides on the inner peripheral surface of the movable resistance contact 31 is provided. The piston 33 is electrically connected to the movable resistance contact 31 and the puffer piston 27. Further, on the outer peripheral side of the movable side resistance contact 31,
An insulating nozzle 36 is arranged. On the other hand, the fixed contact 25 is provided with a resistor 34 at its tip.
Is arranged so as to be electrically connected to the movable-side resistance contact 31 and the insulating nozzle 36 via.

The piston 33 is connected to a rod 4a of a resistance side operation mechanism 4 provided in a mechanism box 13 outside the container 2 via a resistance cutoff connecting mechanism 7. And
The piston 33 is driven by the driving force of the resistance side operation mechanism 4.
Are configured to be driven in the left-right direction in the figure. The resistance breaker connecting mechanism 7 includes a rod 7b that moves in the vertical direction in the drawing and an insulating member in order to transmit the driving force of the rod 4a provided in the resistance side operation mechanism 4 in the horizontal direction in the drawing to the piston 33. A rod 7c is provided. further,
A second lever that connects the rod 4a and the rod 7b and a rotary lever 7d and 7e that connects the insulating rod 7c and the connecting rod 24 are provided in order to convert the driving force to the orthogonal direction. The rods 6b and 7b of the main cutoff portion connection mechanism 6 and the resistance cutoff portion connection mechanism 7 project from the gas seal flange 10 provided on the support insulating cylinder 9 to the outside of the container 1, and the first lever 6a and Second lever 7a
Is provided outside the container.

Further, the main operating mechanism 5 and the resistance side operating mechanism 4
And are connected by a delay mechanism 41. The delay mechanism 41 causes the resistance-side operation mechanism 4 to open the resistance breaking unit 3 with a predetermined delay time from the opening operation of the main breaking unit 2 by the main operating mechanism 5, and uses hydraulic pressure. It is possible to use an electronic timer or an electronic timer.

Further, in the open state shown in FIG. 7, the distance Hm between the movable contact 22 of the main breaking unit 2 and the fixed contact 25 is fixed to the movable resistance contact 31 of the resistance breaking unit 3. It is configured to be larger than the distance Hr with the side resistance contact 35.

The operation of the gas circuit breaker with resistance having the above-described structure is as follows. That is, in the opening operation (FIGS. 6 to 7), when the main operating mechanism 5 is driven, the rod 5a moves leftward in the figure, and the puffer cylinder 21 moves rightward in the figure via the main cutoff portion connecting mechanism 6. Move to. Then, when the resistance side operation mechanism 4 starts driving by the delay mechanism 41 with a delay of 30 to 40 ms from the main operation mechanism 5,
The rod 4a moves to the left in the drawing, and the piston 33 moves to the right in the drawing via the resistance breaker connecting mechanism 7. At this time, the piston 33 moves the flange 3 of the movable-side resistance contact 31.
The movable resistance contact 31 is moved to the right in the figure in contact with 1a, and the movable resistance contact 31 and the fixed resistance contact 35 are separated.

On the other hand, in the closing operation (FIGS. 7 to 6), when the main operating mechanism 5 is driven, the puffer cylinder 21 moves leftward in the figure via the main disconnecting portion connecting mechanism 6, and the main disconnecting portion 2 moves. The closing operation is performed. At the same time, the resistance side operating mechanism 4
Is driven to drive the piston 33 through the resistance breaker connecting mechanism 7.
Moves to the left in the figure. Along with this, the wipe spring 32
The movable resistance contact 31 also moves to the left in the figure.
At this time, the distance Hm between the movable-side contact 22 and the fixed-side contact 25 is determined by the movable-side resistance contact 31 and the fixed-side resistance contact 35.
Since the resistance breaking unit 3 is configured to be larger than the distance Hr between the resistance breaking unit 3 and the main breaking unit 2, the resistance breaking unit 3 is closed prior to the main breaking unit 2 by a predetermined leading time.

[0015]

By the way, suppression of surge voltage is becoming more important for economical design of power transmission equipment and transmission lines. Then, in order to suppress the surge voltage at the time of opening and closing, it is important to accurately perform the preceding closing operation and the delayed breaking operation of the resistance breaking unit 3 with respect to the main breaking unit 2.

Therefore, in order to reduce the variation in the preceding closing time of the resistance breaking unit 3 with respect to the main breaking unit 2, it is conceivable to enlarge the resistor 34. However, increasing the size of the resistor 34 disadvantageously increases the size of the entire device.

The present invention has been proposed in order to solve the problems of the prior art as described above, and its purpose is to provide a main cutoff section and a resistance cutoff which require complicated operations. It is an object of the present invention to provide a highly reliable breaker with resistance, which is accurately driven by an operating mechanism that exhibits high reliability with a simple structure.

[0018]

In order to solve the above-mentioned problems, the invention according to claim 1 is characterized in that a main cutoff portion and a resistance cutoff portion are provided in a container in which an insulating gas is sealed, and the outside of the container is provided. A main operating mechanism for the main breaking unit and a resistance side operating mechanism for the resistance breaking unit are provided, and the main operating mechanism and the resistance side operating mechanism open the main breaking unit by the main operating mechanism. In a gas circuit breaker with a resistance connected to a delay mechanism for delaying the operation of opening the resistance contact by the resistance side operation mechanism after a delay of a predetermined delay time from the operation, the main cutoff section and the main operation mechanism are provided. A first lever for connecting the resistance breaker and a second lever for connecting the resistance cutoff unit and the resistance side operating mechanism. The first and second levers have coaxial rotation axes. Is arranged so that the first lever is A plurality of first couplings are provided, a plurality of second couplings are provided on the second lever, and the first and second couplings are configured to be press-engaged with each other. During the closing operation, the first
And the second coupling are engaged with each other to rotate integrally with each other, and the first coupling is released from the second coupling during the contact breaking operation so that the second coupling can rotate independently. It is characterized by being

According to the second aspect of the invention, the first aspect is
One of the first and second couplings described is constituted by a bearing.

According to a third aspect of the present invention, at least one of the first and second couplings according to the first or second aspect is provided with a claw portion capable of adjusting an arrangement position. Characterize.

[0021]

According to the present invention as described above, during the closing operation, the driving force of the main operating mechanism is transmitted to the main cutoff portion by the first lever, and also passes through the first coupling and the second coupling. It is transmitted to the resistance breaking unit by the two levers. Therefore, both the main breaking unit and the resistance breaking unit are driven.
Since the first coupling and the second coupling are always in contact with each other and rotate integrally with each other, it is possible to surely perform the preceding closing of the resistance breaking portion. During the opening operation, the main operating mechanism first drives the main breaking unit, and then the delay mechanism delays the delay time of 30 to 40 ms to drive the resistance breaking unit by the resistance side operating mechanism. At this time, the clutch unit is in a state where the main breaking unit and the resistance breaking unit are separated from each other, and the delay time of the resistance breaking unit with respect to the main breaking unit is constantly managed by the delay mechanism.

In particular, in the case where a plurality of first and second couplings are provided respectively and are configured to be press-engaged with each other, when one coupling presses the other coupling, it acts on the coupling. The force becomes a couple, and the bending moment applied to the coupling is prevented. Further, when one of the first and second couplings is formed of a bearing, when an impact force acts on the coupling portion, an effect of mitigating the impact force can be obtained. Further, when the claw portion is provided on at least one of the first and second couplings, the mounting position thereof can be finely adjusted, and thus the positional relationship between the first and second levers is finely adjusted. This makes it possible to greatly reduce variations in delay time.

[0023]

【Example】

(1) First Example An example in which the circuit breaker with resistance according to the present invention is applied to a two-point cut UHV gas circuit breaker will be described below.
A specific description will be given with reference to FIGS. 1 to 3. First, Fig. 1
FIG. 4 is a configuration diagram showing an open state of the entire circuit breaker with resistance.
In the drawings, only one of the two sets (the left side in the figure) of the main breaking unit 2 and the resistance breaking unit 3 is shown, and the other similarly configured (the right side in the drawing) is shown for the sake of simplification of the drawing. However, it is not shown here. Further, the same members as the members of the conventional example shown in FIGS. 6 and 7 are designated by the same reference numerals, and the description thereof will be omitted.

That is, in the present embodiment, as shown in FIG. 1, inside the container 1, the distance Hm between the movable contact 22 and the fixed contact 25 of the main breaker 2 is equal to the resistance breaker 3.
The distance Hr is larger than the distance Hr between the movable-side resistance contact 31 and the fixed-side resistance contact 35. Also,
The main operating mechanism 5 and the resistance-side operating mechanism 4 are connected by a delay mechanism 41 provided at the bottom of the container 1. Further, the first lever 61 of the main cutoff portion connection mechanism 6 and the second lever 70 of the resistance cutoff portion connection mechanism 7 are coupled by the coupling portion 8
They are connected with 0.

2 shows the outside of the container 1 of FIG.
FIG. 6 is a schematic perspective view showing a delay mechanism 41 and a coupling section 80 of the main operation mechanism 5 and the resistance side operation mechanism 4 connected to the delay mechanism 41. As shown in FIG. 2, the coupling portion 8
At 0, the first and second lever shafts 60, 70 are
The ends are coaxially fixedly arranged so as to face each other. A first lever 61 is fixed to an end of the first lever shaft 60 that faces the second lever shaft 70. This first
The lever 61 includes a mechanism side arm 61a and a blocking section side arm 6
1b and L-shaped, and is attached to the first lever shaft 60 at its bent portion. The rod 5a is connected to the end of the mechanism-side arm 61a of the first lever 61, and the main operation mechanism 5 is connected via this rod 5a. A rod 6b is provided on the blocking unit side arm 61b of the first lever 61. This rod 6b is
It is connected to the two main cutoff portions 2 via the rotary levers 6d and 6e. Further, the first coupling portion has a second coupling portion on the end surface of the first lever 61 facing the second lever shaft 70.
It is provided so as to project in the direction of the lever shaft 70. This first
The coupling portion is provided with two notches that are point-symmetric with respect to the first lever shaft 60, and two first couplings 81 are in a protruding state.

On the other hand, a second lever 71 is fixed to the second lever shaft 70 at the end facing the first lever shaft 60. The second lever 71 is L-shaped having a mechanism side arm 71a and a blocking section side arm 71b, and is attached to the second lever shaft 70 at its bent portion. The rod 4a is attached to the end of the mechanism-side arm 71a of the second lever 71.
Are connected, and the resistance side operation mechanism 4 is connected via this rod 4a. A rod 7b is provided on the blocking unit side arm 71b of the second lever 71.
The rod 7b is connected to the two resistance breaking units 3 via the rotary levers 7d and 7e. Furthermore, the end face of the second lever 71 facing the first lever shaft 60 has a second
The coupling portion is provided so as to project toward the first lever shaft 60. The second coupling portion is provided with two notches that are point-symmetrical with respect to the second lever shaft 70, and two second couplings 82 project. Then, the above-mentioned first and second couplings 8
When the circuit breaker is closed (when the contact is opened), the reference numerals 1 and 82 rotate by pressing and engaging with each other, and when the breaker is closed (closed), they are released and rotate independently. Is configured.

FIG. 3 is a sectional view showing a state in which the coupling portion 80 of this embodiment is cut along a plane perpendicular to the axis,
(A) shows a closed (open) state, (B) shows a closed (closed) state, and (C) shows a state in which only the main breaker 2 is opened. That is, the first and second couplings 8
As shown in FIG. 3 (A), the cross sections of the Nos. 1, 82 are fan-shaped having arcs of substantially the same angle,
The second lever shafts 60, 70 are arranged in point symmetry. Then, in a state where the radii of the first and second couplings 81 and 82 facing each other are brought into contact with each other, a small fan-shaped gap 83 having an arc with a small angle is left at two circular locations. It is said that. Then, during the closing operation (closing operation) of the blocking portion, the first coupling 81 rotates in the same direction as the first lever shaft 60 rotates in one direction, and the first coupling 81 The second coupling 82 is pressed by the second lever shaft 70
Are configured to rotate in the same direction. In addition, during the breaking operation of the breaking unit (at the time of opening operation), the first lever shaft 6
0 rotates in the opposite direction to the closing operation, and the first coupling 81
Is released from the second coupling 82 and is configured to be independently rotatable.

Further, the main operating mechanism 5 and the resistance side operating mechanism 4
Are connected to the delay mechanism 41. This delay mechanism 41
Is set so that the opening operation of the resistance breaking unit 3 by the resistance side operation mechanism 4 is delayed by about 30 to 40 ms with respect to the opening operation of the main breaking unit 2 by the main operating mechanism 5.

The operation of this embodiment configured as described above will be described with reference to FIG.

First, in the breaking state as shown in FIG. 3A, both the main breaking section 2 and the resistance breaking section 3 are in the open state. When a closing command is input to the main operation mechanism 5 and the resistance side operation mechanism 4 from this cutoff state, the operation mechanism 4,
5, the first lever 61 via the rods 4a and 5a.
And the second lever 71 is driven.

At this time, the first lever provided on the first lever 61
The coupling 81 is a second lever provided on the second lever 71.
While pressing the coupling 82, it rotates counterclockwise in the figure. Therefore, by setting the rotation speed of the first lever shaft 60 to be higher than the rotation speed of the second lever shaft 70, the first lever 61 and the second lever 71 can be simultaneously rotated. Therefore, it is possible to reliably prevent the main breaking unit 2 from performing the closing operation prior to the resistance breaking unit 3, and the main breaking unit 2 and the resistance breaking unit 3 can be simultaneously closed. In addition, the movable contactor 2 of the main shutoff unit 2
Since the distance Hm between the fixed contactor 25 and the fixed contactor 2 is larger than the distance Hr between the movable resistance contactor 31 of the resistance breaking unit 3 and the fixed resistance contactor 35 of the resistance breaking unit 3, the resistance breaking unit. 3 is turned on first, bypassing the resistor 34. Then, in such a closed state of the main breaking portion 2 and the resistance breaking portion 3, the coupling portion 80 has a positional relationship as shown in FIG. 3 (B).

Next, when a shutoff command is input to the main operating mechanism 5 and the delay mechanism section 41 from the closed state as shown in FIG. 3B, the main operating mechanism 5 causes the main operating mechanism 5 and the delay mechanism section 41 to move to the first position via the rod 5a. The 1-lever 61 is driven. On the other hand, the resistance side operation mechanism 4
Is delayed by the delay mechanism unit 41,
At this point, the opening operation is not started.

Therefore, only the main operation mechanism 5 starts the opening operation, and the first coupling 81 provided on the first lever 61 is separated from the second coupling 82 provided on the second lever 71. Rotate clockwise in the figure. In this case, the second coupling 82 is released from the first coupling 81, and the supply of the driving force is also suppressed by the delay mechanism 41. Therefore, it is not possible to rotate the second coupling 82 before the first coupling 81. It is possible. Therefore, it is possible to reliably prevent the resistance breaker 3 from opening the main breaker 2 in advance, and by the operation of the first lever 61, only the main breaker 2 is opened ahead of the current. It can be cut off at the zero point.

As a result, the current flows through the resistance breaker 3. In the shut-off state of only the main shut-off portion 2 as described above, the coupling portion 80 has a positional relationship as shown in FIG. That is, the first coupling 81 and the second coupling 82 are in contact with each other on the surface opposite to the surface with which they are in contact in the closed state.

Then, in the shut-off state of only the main shut-off portion 2 as shown in FIG. 3C, the second coupling 82
Is released from the first coupling 81 with respect to the clockwise direction in the drawing, which is the opening direction, so that it can freely rotate independently. That is, from the time point when the shutoff operation of the main shutoff unit 2 as described above is completed, the delay mechanism unit 41 sets the delay time to 30-40
After a delay of ms, the resistance side operation mechanism 4 starts the opening operation, the second lever 71 is driven via the rod 4a, the resistance breaking unit 3 opens, and the resistance breaks at the current zero point.

As described above, in the present embodiment, the main shutoff section 2 and the resistance means section 3 can be individually driven by the main operating mechanism 5, the resistance side operating mechanism 4, and the delay mechanism section 41. In the closing operation, the resistance breaking unit 3 precedes the main breaking unit 2 by about 10 ms, and in the breaking operation, the resistance breaking unit 3 delays the main breaking unit 2 by about 30 to 40 ms to perform the breaking operation. You can

In addition, the first coupling 81 provided on the first lever shaft 60 and the second coupling 82 provided on the second lever shaft 70 ensure that the two main shutoff portions 2 are secured during the closing operation. Since it can be driven integrally, the resistance breaker 3
It is possible to reliably perform the preceding injection of, and there is little variation in delay time. Further, during the shutoff operation, the second lever shaft 70
Depends on the function of the coupling portion 80, the first lever shaft 6
It cannot rotate before 0. Therefore, it is possible to reliably prevent the resistance breaker 3 from opening before the main breaker 2 is opened, and it is possible to improve the operation reliability.

Further, in this embodiment, two first couplings 81 and two second couplings 82 are provided in point symmetry, and each coupling 81, 8 is provided.
2 engage each other with the opposing couplings,
The force acting on the coupling portion 80 during the closing operation becomes a couple, and the bending moment applied to the coupling portion 80 can be prevented. As a result, durability and reliability can be improved. Also, the first and second couplings 8
The first and second levers 1 and 82 are provided integrally with the first and second levers 61 and 71, respectively. Therefore, the entire coupling portion 80 can be simplified and both levers 6 and
First and second lever shafts 60 to which 1, 71 are attached,
The deviation of the axis of 70 can be minimized.

(2) Second Embodiment In the present invention, the coupling portion 80 of the gas breaker with resistance of the first embodiment can be constructed as follows.
That is, as shown in FIG. 4, the first lever 61 connected to the main cutoff portion 2 is provided with two first sector-shaped couplings 81 which are point-symmetrical with respect to the first lever shaft 60. On the other hand, the second lever 71 connected to the resistance breaker 3
As a second coupling in the second coupling part,
Two bearings 84 which are point-symmetric with respect to the second lever shaft 70 are provided. First coupling 8
1 and the bearing 84 are configured to be pressed and engaged to rotate integrally when the circuit breaker is closed, and released when the circuit breaker is closed to rotate independently.

The operation of the present embodiment configured as described above will be described with reference to the drawings.

First, in the shut-off state as shown in FIG. 4A, when a closing command is input to the main operating mechanism 5 and the resistance side operating mechanism 4, the first coupling 81 presses the bearing 84. While rotating in the counterclockwise direction in the figure, the main breaking unit 2 and the resistance breaking unit 3 are turned on. The coupling portion 80 at this time has a positional relationship as shown in FIG.

Next, when a disconnection command is input to the main operating mechanism 5 and the delay mechanism section 41 from the closed state as shown in FIG. 4B, only the main operating mechanism 5 starts the opening operation. , First
The first coupling 81 provided on the lever 61 is
It rotates clockwise in the drawing so as to move away from the bearing 84 provided on the lever 71. In such a shut-off state of only the main shut-off portion 2, the coupling portion 80 has a positional relationship as shown in FIG. 4 (C).

Then, in the shut-off state of only the main shut-off portion 2 as shown in FIG. 4C, the bearing 84 of the second coupling is in the clockwise direction in the drawing which is the opening direction.
Since it is released from the first coupling 81, it can freely rotate independently.

In this embodiment as described above, the same effect as that of the first embodiment can be obtained, and the second coupling portion engages with the first coupling 81 via the bearing 84 during the closing operation. Therefore, when an impact force acts on the coupling portion 80, an effect of mitigating the impact force can be obtained.

In this embodiment, the first lever 61 connected to the main cutoff portion 2 is provided with the bearing 84 as the first coupling, and the second lever 71 connected to the resistance cutoff portion 3 has two bearings 84. It is also possible to provide a second coupling 82 having a fan-shaped cross section.

(3) Third Embodiment In the present invention, the coupling of the first embodiment can be constructed as follows. 5A shows a cutoff state, FIG. 5B shows a closed state, and FIG. 5C shows a state in which only the main cutoff portion 2 is opened.

That is, as shown in FIG.
The first lever 61 connected to the first lever 61 is provided with two first couplings 81 having a fan-shaped cross section which are point-symmetrical about the first lever shaft 60. On the other hand, the second lever 71 connected to the resistance cutoff portion 3 has two second sector coupling fan-shaped couplings 82 that are point-symmetrical about the second lever shaft 70.
Is provided. The second coupling portion is provided with a notch larger than the first coupling portion, so that the second coupling 82 is formed smaller than the first coupling. The claw portion 85 is provided on the end face of the second coupling 82 in the clockwise direction through the spacer 86. The claw portion 85 is attached to the second coupling portion with a bolt 85a. The claw 85
A groove 85b, into which the bolt 85 is inserted, is formed at a long length in the circumferential direction. Thereby, by adjusting the spacer 86 between the claw portion 85 and the second coupling,
It is configured so that the arrangement position of the claw portion 85 in the circumferential direction can be adjusted.

The claw portion 85 provided on the second coupling 82 as described above is engaged and pressed with the first coupling 81 during the closing operation of the circuit breaker and integrally rotates, and during the breaking operation of the circuit breaker. It is configured to release and rotate independently.

In this embodiment thus constructed, the same effect as that of the first embodiment can be obtained, and the claw portion 8 is provided.
Since the arrangement position of 5 is adjustable, the positional relationship between the first lever 61 and the second lever 71 can be finely adjusted during assembly. By this fine adjustment, variation in delay time can be significantly reduced, and high operation reliability can be obtained.

Here, the present embodiment can be configured as follows. That is, the two first couplings 81 are provided on the first lever 61. The claw portion 85 is provided on each first coupling 81 via a spacer, and the position of the claw portion 85 can be adjusted. On the other hand, the second lever 71 is provided with two second couplings 82. Even with such a configuration, the same effect as that of the above-described embodiment can be obtained.

The present invention is not limited to the above-mentioned embodiments, and those skilled in the art can think of other various embodiments in the same manner, and all of them are included in the present invention. It is included in the range of. For example, the first
The number of the first and second couplings 82 provided on the second lever 71 is not limited to two, which are symmetrical with respect to each point. One or three or more of them may constitute a similar embodiment. It is possible.

[0052]

As described above, according to the present invention, the first lever for transmitting the driving force to the main interruption portion and the second lever for transmitting the driving force to the resistance interruption portion are respectively press-engaged. With the simple structure of providing the coupling, it is possible to accurately drive the interlocking operation of the main breaking unit and the resistance breaking unit, which require complicated operations, and provide a highly reliable breaker with resistance.

In particular, when a plurality of first and second couplings are provided, the force acting on the coupling can be used as a couple and the bending moment applied to the coupling can be prevented. Further, when one of the first and second couplings is formed of a bearing, when an impact force acts on the coupling portion, an effect of mitigating the impact force can be obtained. Furthermore, the first or second
When the claw portion is provided on at least one of the couplings, the mounting position of the claw portion can be finely adjusted, and thus the positional relationship between the first and second levers can be finely adjusted. Therefore, it is possible to provide a circuit breaker with resistance having excellent reliability.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing an open state of a gas circuit breaker with a resistor according to an embodiment of the present invention.

FIG. 2 is a schematic perspective view showing a delay mechanism outside the container of FIG. 1 and a coupling portion of a main operation mechanism and a resistance side operation mechanism connected to the delay mechanism.

FIG. 3 is a cross-sectional view showing a state in which the coupling section of FIG. 1 is cut along a plane perpendicular to a rotation axis, and (A) shows a cutoff (opening).
State, (B) is a closed (closed) state, and (C) is a state in which only the main breaker is opened.

FIG. 4 is a cross-sectional view showing a state in which the coupling part of the gas circuit breaker with resistance of the second embodiment is cut along a plane perpendicular to the rotation axis, (A) being in a shut-off state, (B) being in a closed state; (C) shows the state in which only the main breaker is open.

5A and 5B are cross-sectional views showing a state in which the coupling part of the gas circuit breaker with resistance of the third embodiment is cut along a plane perpendicular to the rotation axis, where FIG. 5A is a cutoff state, and FIG. (C) shows the state in which only the main breaker is open.

FIG. 6 is a cross-sectional view showing an example of a conventional gas circuit breaker with a resistance, showing a closed state.

7 is a sectional view of FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Container 2 ... Main interruption part 3 ... Resistance interruption part 4 ... Resistance side operation mechanism 4a, 5a, 6b, 7b ... Rod 5 ... Main operation mechanism 6 ... Main interruption part connection mechanism 60 ... 1st lever shaft 61 ... 1st Lever 6c, 7c ... Insulating rod 6d, 6e, 7d, 7e ... Lever 7 ... Resistance interrupting part connecting mechanism 70 ... Second lever shaft 71 ... Second lever 8 ... Insulating gas 9 ... Support insulating cylinder 10 ... Gas shield flange 13 ... Mechanism box 21 ... Puffer cylinder 21a ... Gas hole 22 ... Movable side contactor 23 ... Insulation nozzle 24 ... Connecting rod 25 ... Fixed side contactor 26 ... Conductive contactor 27 ... Puffer piston 28 ... Puffer chamber 31 ... Movable side resistance contactor 31a ... Flange 32 ... Wipe spring 33 ... Piston 34 ... Resistor 35 ... Fixed-side resistance contact 36 ... Insulation nozzle 41 ... Delay mechanism 80 ... Coupling part 81 ... First Ppuringu 82 ... stationary contact 2 and the second coupling 83 ... gap 84 ... Bearing 85 ... claw portions 85a ... Bolt 86 ... movable contact 22 in the spacer Hm ... open state
Distance Hr ... Distance between the movable resistance contact 26 and the fixed resistance contact 35 in the closed state

Continuation of the front page (72) Inventor Takeo Toyota, 2-1, Ukishimacho, Kawasaki-ku, Kawasaki-shi, Kanagawa Stock company Toshiba Hamakawasaki factory

Claims (3)

[Claims] 1. A main cutoff portion and a resistance cutoff portion are provided in a container in which an insulating gas is sealed, and a main operation mechanism for the main cutoff portion and a resistance side operation mechanism for the resistance cutoff portion are provided outside the container. The main operation mechanism and the resistance side operation mechanism are provided with the resistance side operation mechanism for opening the resistance contact after a delay of a predetermined delay time from the main opening operation of the main cutoff portion by the main operation mechanism. A gas circuit breaker with a resistance, to which a delay mechanism for performing an operation is connected, for connecting the main breaker unit and the main operating mechanism to a first
A second lever is provided for connecting the resistance cutoff portion and the resistance side operating mechanism, and the first and second levers are arranged such that their rotation axes are coaxial. The first and second levers are respectively provided with first or second notches having one or more notch structures, and are respectively provided with first and second couplings that press and engage with each other. The first coupling and the second coupling are engaged with each other to rotate integrally with each other when the contact is closed, and the first coupling is the second coupling when the contact is closed. A gas circuit breaker with a resistance, which is characterized in that the gas circuit breaker is configured to be independently rotated. 2. One of the first and second couplings,
2. The gas circuit breaker with resistance according to claim 1, wherein the gas circuit breaker comprises a bearing. 3. The resistor according to claim 1, wherein at least one of the first and second couplings is provided with a claw portion capable of adjusting an arrangement position. Gas circuit breaker.