JPH07288067A - Switchgear - Google Patents

Abstract

PURPOSE:To provide such a reliable switchgear as being capable of making at a high speed of 20-30 milliseconds from a closing instruction and being specially suitable for making into a surge absorber system. CONSTITUTION:A fixed arc contact 4 and a movable arc contact 5 are opposed each other in an approach and separation allowable manner in a tank 1 filled with insulating gas G. The fixed arc contact 4 is fixed integrally with ant operating rod 11 to form a movable electrode B. The movable electrode B is connected to an operating mechanism 18 via a driving direction changing mechanism C. The driving direction changing mechanism C is formed with an insulated operating rod 13 in an idler link shape, an in-gas rotating lever 14, a rotary shaft 15, an in-air rotating lever 16 and an idler link 17. As an operating mechanism 18, an operating mechanism for a usual breaker is used, so that driving force in a maximum speed operating direction causes the movable electrode B to be driven via the driving direction changing mechanism C for high speed closing action equivalent to the high speed opening action of a breaker.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a switchgear, and more particularly, to a switchgear for rapidly inserting a surge absorber for suppressing transient AC overvoltage in an AC switchgear of a DC power system converter station. .

[0002]

2. Description of the Related Art While demand for electric power is becoming more concentrated in urban areas,
Construction of power supply facilities is becoming difficult in urban areas. For this reason, a long-distance, large-capacity power transmission system has been developed to operate power over a wide area to improve efficiency. In such wide area operation, power flow control becomes complicated, and system stability becomes a problem. On the other hand, a DC system has been introduced to ensure the stability of the system.

As such a direct current system, a direct current power transmission for transmitting a long-distance direct current, a direct current power transmission for avoiding a large electrostatic capacity, a large charging current and a large reactive power when a submarine cable is used, DC cooperation to divide the system,
Alternatively, there is frequency conversion for connecting different frequencies. Since these are not generally multi-terminal network systems, in the event of an accident on the DC side, the power supply to the thyristor valve is stopped and the entire system is stopped.

On the other hand, in the case of an accident on the AC side system,
The AC system in which the accident occurred will be disconnected, but at this time, the load on the AC side as viewed from the DC conversion station will be disconnected, so the impedance of the AC system as viewed from the AC side bus of the conversion station will increase. As a result, since the resistance component is small and the Q value of resonance is large, a severe AC overvoltage is generated.

Although this overvoltage can be suppressed by stopping the conversion station, it is desirable to suppress the overvoltage by a surge absorber in order to promptly restart the conversion station after the accident is removed. However, this overvoltage is an alternating current, and in order to suppress it to an allowable overvoltage, compared with conventional surge absorbers that absorb surges caused by lightning,
It is required to control it to a much lower level. Therefore, a very large surge absorber is required.

[0006] In order to solve this, it is possible to introduce a surge absorber into the system only when necessary.

FIG. 13 shows the structure of a general gas circuit breaker. An insulating gas such as SF ₆ gas is sealed inside the tank 1. It has a pair of fixed contacts 4 and movable contacts 5 that can be brought into and out of contact with each other, and these contacts 4 and 5 are connected with connection conductors 33 and 34 for connection with an external device. Of these, the movable contactor 5 is connected to an operation mechanism 18 outside the tank 1 via an insulating operation rod 13.
The driving force of the operating mechanism 18 is used to perform the closing / closing operation. In addition, a general circuit breaker is designed so that the operating speed of the movable contactor 5 in the direction of the arrow, which is the breaking operation direction, is higher than the operating speed of the closing direction, which is the opposite direction, such as high speed. The circuit breaker is designed so that the breaking time is 20 to 30 milliseconds and the closing time is about 100 milliseconds. Therefore, the operating mechanism 18 of FIG. 13 is designed to cause the movable contact 5 to perform the high speed operation of this level.

[0008]

However, since it is required to insert the surge absorber into the system at a high speed of 20 to 30 milliseconds, as described above, the introduction time is about 100 milliseconds. If a conventional conventional circuit breaker is used as it is, there is a problem that it will not be in time. Therefore, the surge absorber should be 20-30
It is required to develop a switchgear that can be applied to the grid at a high speed of millisecond. Then, in order to realize such a switchgear capable of high-speed input, specifically, it is necessary to develop the following mechanism. (1) Development of an operating mechanism that can be turned on at a high speed of 20 to 30 milliseconds from a turn-on command. (2) Development of a structure that can withstand the impact of contact points or a mechanism that reduces this impact due to the high closing speed.

The present invention has been proposed in order to solve the problems of the prior art as described above, and the purpose thereof is to be able to perform the injection at a high speed of 20 to 30 milliseconds from the injection instruction, In particular, it is to provide a highly reliable switchgear suitable for introducing a surge absorber into a system.

[0010]

The opening / closing device of the present invention is provided with a driving force direction changing mechanism for changing the direction of the driving force of the operating mechanism, or with an intermediate contactor provided between opposing contactors. Is it configured such that the opening / closing direction of the intermediate contactor is opposite to that of the movable contactor of the normal switchgear to achieve high-speed closing operation by utilizing the high-speed operation of the operating mechanism of the conventional circuit breaker?
Alternatively, one of the contacts is provided with a trigger electrode so as to shorten the electrical closing time.

According to a first aspect of the present invention, there is provided a switchgear in which a first and a second contactor which can be electrically contacted and separated are arranged to face each other in a container enclosing an insulating medium, and at least one contactor is the container. Is configured to be electrically insulated from the container and connectable to an external electric circuit, and the first contactor is driven to the outside of the container by driving the first contactor and the second contactor. In the opening / closing device provided with the operation mechanism for opening and closing the space, the operation mechanism and the portion for transmitting the driving force of the operation mechanism to the first contact are configured as follows.

That is, in the switchgear according to the first aspect, the operating mechanism is provided so as to be capable of reciprocating, and one of the operating directions is configured to be the highest operating direction in which the operating direction is faster than the other operating direction. To be done. Further, a driving force direction conversion mechanism is provided that converts the driving force of the operating mechanism in the highest speed operation direction into the driving force in the closing operation direction of the first contactor and transmits the driving force.

The switchgear according to claim 2 has the following features in addition to the configuration according to claim 1. That is, in the opening / closing device according to the second aspect of the present invention, the operation rod integrally provided with the first contactor is provided, and the operation rod is connected to the operation mechanism via the driving force direction conversion mechanism. Further, the driving force direction changing mechanism includes a rotary lever that changes the direction of the driving force of the operating mechanism, and a floating link type insulated operating rod connected between the rotating lever and the operating rod. Furthermore, the operating rod and the insulating operating rod are arranged so as to be substantially linearly aligned at the position where the first contactor comes into contact with the second contactor.

The switchgear according to claim 3 has the following features in addition to the configuration according to claim 1. That is, in the opening / closing device according to the third aspect, the operating mechanism is arranged such that its operating direction and the operating direction of the first contactor are parallel. Also, the driving force direction conversion mechanism is
It includes a rotary lever that reverses the direction of the driving force of the operating mechanism.

The switchgear according to claim 4 has the following features in addition to the configuration according to claim 1. That is, in the opening / closing device according to claim 4, the operating mechanism sharply reduces the operating speed of the first contactor immediately before the first contactor contacts the second contactor during the closing operation. It is characterized by having a device.

According to a fifth aspect of the present invention, there is provided a switchgear in which a first and a second contactor which can be electrically contacted and separated are arranged to face each other in a container in which an insulating medium is sealed, and at least one contactor is the container. A switchgear which is electrically insulated from the container and is connectable to an external electric circuit, and which is provided with an operation mechanism for opening and closing between the first and second contacts outside the container.
And the second contactor portion are configured as follows.

That is, in the opening / closing device according to the fifth aspect, the first contactor is a movable contactor fixedly provided on the operating mechanism side, and the second contactor is a movable contactor. It is a fixed side contactor fixedly provided at the opposing position. An intermediate contactor that moves along the axial direction of these contactors to open and close the contactors is arranged between the movable side contactor and the fixed side contactor. , Is connected to the operating mechanism via an insulating operating rod that penetrates the movable contact. Further, the intermediate contactor is in a position where it contacts only the fixed-side contactor and is separated from the movable-side contactor in the open state, and moves toward the movable-side contactor during the closing operation to close the circuit. In the state, it is configured such that both ends thereof are in a position of contacting both the movable side contactor and the fixed side contactor.

The switchgear according to claims 6 and 7 is the same as claim 5.
In addition to the described configuration, it has the following features.
That is, in the switchgear according to claim 6, during the opening operation for moving the intermediate contact toward the fixed contact between the intermediate contact and the fixed contact, the gas between the contact is released. It is characterized in that a compression chamber that is compressed and blows between the intermediate contactor and the movable contactor is formed. The switchgear according to claim 7 is characterized in that, in addition to the structure according to claim 5, a magnetic field extinguishing coil is provided near the tip of the movable contact.

According to another aspect of the present invention, there is provided a switchgear in which a first and a second contactor which can be electrically contacted and separated from each other are arranged to face each other in a container in which an insulating medium is enclosed, and at least one contactor is provided. The container is configured to be electrically insulated from the container and connectable to an external electric circuit, and the first contactor or between the first contactor and the second contactor is provided outside the container. In an opening / closing device provided with an operating mechanism for driving a third contactor provided in the first and second contactors to open and close between the first and second contactors, a spring is provided between any one of the contactors and a supporting member thereof. It is characterized by being done.

That is, the opening / closing device according to the eighth aspect is provided with a supporting member for movably supporting the second contactor, and a spring is arranged between the supporting member and the second contactor. Is configured to urge the second contactor toward the first contactor side. Further, in the opening / closing device according to claim 9, a support member that movably supports the first contact is provided, and a spring is disposed between the support member and the first contact, and the spring is the first. It is characterized in that it is configured so as to urge the contactor of (1) to the second contactor side. Further, in the opening / closing device according to claim 10, the first contact is arranged on the side of the operating mechanism, and the third contact is connected to the operating mechanism by penetrating the first contact. And a spring is arranged between the operation rod and the third contact, and the spring is configured to urge the third contact toward the first contact. Is characterized by.

According to an eleventh aspect of the present invention, in a switchgear, first and second contacts that can be electrically contacted and separated from each other are arranged to face each other in a container in which an insulating medium is sealed, and at least one contactor is the container. It is configured to be electrically insulated from and connectable to an external electric circuit, and is provided outside the container between the first contactor or between the first contactor and the second contactor. An opening / closing device provided with an operation mechanism for driving the third contactor provided to open and close between the first and second contactors is characterized in that a trigger electrode is provided at the contactor portion.

That is, the switchgear according to claim 11 is:
The first contact is arranged on the operation mechanism side, and the second contact
The trigger electrode is provided inside the contactor through the insulating tube, and the second contactor and the trigger electrode are connected in series with the power supply for trigger application and the timer switch. And
This timer switch is set so as to be closed in synchronization with the closing command of the switchgear, and the dielectric breakdown voltage between the second contact and the trigger electrode becomes lower than the voltage generated when the power supply is closed. It is characterized by being set as follows.

[0023]

According to the opening / closing device of the present invention having the above structure, the following effects can be obtained.

According to the switchgear of claim 1, the driving force in the highest speed operation direction is transmitted to the first contactor through the driving force direction conversion mechanism by utilizing the conventional operating mechanism of the circuit breaker. However, the first contactor can be driven in the closing operation direction. Therefore, it is possible to perform a high-speed closing operation equivalent to the high-speed opening operation of the circuit breaker, depending on the highest-speed operation direction of the operating mechanism.

According to another aspect of the present invention, there is provided an operating rod integrally fixed to the first contactor at the time of contact of the contactor, and a floating link type insulating operating rod for driving the operating rod. Are aligned in a straight line, the lateral load acting on the first contactor and the operating rod can be minimized to prevent the buckling strength from being lowered due to impact. Therefore, the mechanical strength stability can be improved.

According to the opening / closing device of the third aspect, the operating direction of the operating mechanism and the operating direction of the first contact are parallel to each other.
The driving force of the operating mechanism can be easily reversed.

According to the opening / closing device of the fourth aspect, since the operating mechanism is provided with the braking device, the first contactor is suddenly braked immediately before the contact of the first contactor with the second contactor. Since the relative speed at the time of contact between these contacts can be rapidly reduced after the start, the impact force at the time of contact can be sufficiently reduced.

According to the opening / closing device of the fifth aspect, since the opening / closing direction of the intermediate contactor is opposite to the moving contactor of the normal opening / closing device, the closing operation direction is the opening operation direction of the normal breaker. Will match. Therefore, by simply connecting the operating mechanism of the circuit breaker to the intermediate contactor as it is, it is possible to perform a high-speed closing operation equivalent to the high-speed opening operation of the circuit breaker, depending on the highest operating direction of the operating mechanism.

According to the switching device of the sixth and seventh aspects, it is possible to improve the arc extinguishing ability of the arc generated between the intermediate contactor and the movable side contactor during the opening operation. That is, according to the switchgear of claim 6, when the intermediate contactor is opened, the gas in the compression chamber is compressed, and the compressed gas is blown to the arc generated between the intermediate contactor and the movable side contactor. You can
Further, according to the switching device of the seventh aspect, the arc generated between the intermediate contactor and the movable side contactor can be driven to rotate at a high speed by the magnetic field generated by the current flowing through the magnetic field extinguishing coil.

According to the opening / closing device of claims 8 to 10,
The impact force acting between the contact elements and the second or third contact element can be absorbed by the spring provided between any one of the contact elements and its supporting member.

According to the eleventh aspect of the switchgear, when the switch is turned on, a pulse is externally applied by the trigger electrode provided on the second contactor, so that the dielectric breakdown between the contactors is quickly generated and the switchgear is electrically connected. Can be input quickly.

[0032]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A plurality of embodiments in which the present invention is applied to a switchgear for applying a surge absorber for suppressing an AC overvoltage to a system will be described below with reference to FIGS. To do.

[1] First Embodiment ... FIGS. 1 and 2 [1-1] Configuration of Embodiment FIG. 1 is a diagram showing a first embodiment of a switchgear according to the present invention. As shown in FIG. 1, an insulating gas G having excellent insulating properties such as SF ₆ gas is filled in the tanks 1 and 1a of the ground potential which are arranged in series in the vertical direction in the figure,
Gas is separated from each other by an insulating support member 2 inserted between the tanks 1 and 1a. In the tank 1a at the upper part of the figure, the connection conductor 3 is arranged substantially on the central axis of the tank 1a. The connection conductor 3 is connected at its upper end to a surge absorber such as a lightning arrester (not shown).
Further, the lower end portion of the connection conductor 3 is inserted into the connector 9 of the insulating support member 2, and the connection conductor 3 is supported by the insulating support member 2. A fixed arc contactor 4 is provided on the surface of the insulating support member 2 inside the tank 1 so as to be positioned substantially on the central axis of the tank 1, and is supported by the insulating support member 2. The fixed arc contactor 4 is electrically and mechanically connected to the connection conductor 3 in the tank 1a through a conductor 3a penetrating the insulating support member 2, and together with a shield 7 provided around the fixed conductor, a fixed electrode. It is configured as part A. A shield 7 is also provided around the connector 9 of the insulating support member 2.

A movable arc contact 5 which comes into contact with and separates from the fixed arc contact 4 is arranged coaxially with the tank 1 at a position facing the fixed arc contact 4 inside the tank 1.
An insulating nozzle 6 is arranged around it. The movable arc contactor 5 and the insulating nozzle 6 are fixed to the operation rod 11 and the puffer cylinder 12 and are configured as a movable electrode portion B that operates integrally. The movable electrode portion B which operates integrally is a puffer piston 1 supported by an insulating support member 2a fixed to the tank 1.
9 and the guide 19a are slidably fitted.

The movable electrode portion B compresses the space formed between the puffer piston 19 and the puffer cylinder 12 at the time of the opening operation, so that the fixed arc contactor 4 and the movable arc contactor 5 through the insulating nozzle 6. The arc is extinguished by spraying it toward the arc generated between and. The puffer cylinder 12 is a member having a function as a conductor, and the ground conductor 2 is insulated by the supporting insulating member 2b from the tank 1 via the contacts 8 and 8a.
It is grounded through 0.

The end of the operating rod 11 on the side opposite to the movable arc contact 5 is an insulating operating rod 13, a rotating lever in gas 14, a rotating shaft 15, a rotating lever 16 in air, and a floating link, which are configured as floating links. An operating mechanism 18 is connected via a driving force direction changing mechanism C composed of 17. Of these, the insulating operation rod 13 and the in-gas rotary lever 14 are the mechanism case 1 communicating with the tank 1.
It is stored in 0. The rotating shaft 15 is provided so as to penetrate the inside and outside of the mechanism case 10,
The mechanism case 10 is designed to rotate while maintaining airtightness. The in-air rotating lever 16 and the floating link 17 are provided outside the mechanism case 10.

It is to be noted that, depending on the circuit conditions, when grounding through the ground conductor 20 as in this embodiment, the insulating support member 2b connecting the movable electrode portion to the container 1 and the insulating support member 2b. The operating rod 13 does not necessarily have to be an insulator, but it is desirable to surely insulate it in order to clarify the ground route, prevent welding due to partial discharge, and reduce the influence on the control system. .

Further, as the operation mechanism 18 of this embodiment,
An operation mechanism of a circuit breaker, which includes a damper portion 18a, a damper gap 18b, and a piston rod 18c and reciprocates the piston rod 18c left and right in the drawing, is used. That is, the operating mechanism 18 operates at a high speed in a predetermined operation stroke for about 100 milliseconds when the piston rod 18c moves in the left direction in the drawing, and when the piston rod 18c moves in the right direction in the drawing, the maximum output is obtained. 20-30
It is an operating mechanism configured to operate at the highest speed in about a millisecond. In the circuit breaker, as described above, 20 to 3
It is used such that the driving force in the highest speed operation direction of about 0 milliseconds becomes the driving force in the circuit opening operation direction of the circuit breaker.
On the other hand, in the switchgear of this embodiment used for making the surge absorber into the system, the maximum speed of about 20 to 30 milliseconds is required in the closing operation, contrary to the circuit breaker. . Therefore, the operating mechanism 18 of the present embodiment
The drive force in the highest speed operation direction of the piston rod 18c is driven in the closing operation direction of the movable electrode portion B by a series of drive force direction conversion mechanism C from the floating link type insulated operation rod 13 to the idle link 17. It is configured to change direction as a force. That is, the piston rod 18
By moving c in the rightmost direction at the highest speed in the figure, the movable electrode portion B is driven in the closing direction at the top in the figure, and conversely, the piston rod 18c is moved in the leftward direction at the highest speed in the figure. When the movable electrode portion B is operated, the movable electrode portion B is driven in the downward opening direction in the drawing.

Further, the opening / closing device of this embodiment is constructed so that the members have a positional relationship as shown in FIG. 2 immediately before the closing operation of the operating mechanism 18 is completed. Figure 2
FIG. 2 is a diagram schematically showing a main part of FIG. 1, showing a state immediately before the closing operation of the switchgear. In FIG. 2, the in-gas rotary lever 14 operates in the direction of arrow 100 in the figure, and the movable arc contactor 5 is at the position immediately before contacting the fixed arc contactor 4. In this state, the damper portion 18a at the end of the operation mechanism piston is inserted into the damper gap 18b, and the piston rod 18c, which is the drive shaft, is inserted.
Is in a braking position where the contact speed of the movable arc contactor 5 is reduced. In this way, at the end of the circuit closing operation from the position immediately before the movable arc contactor 5 comes into contact with the fixed arc contactor 4 to the contact position which is the circuit closing position, the floating link type of the driving force direction changing mechanism C is formed. Insulated operating rod 13
Are arranged substantially linearly with the axial direction of the operating rod 11 determined by the bearings 110 and 120.

[1-2] Operation of the Embodiment The operation of the switchgear of the present embodiment having the above-mentioned structure is as follows. First, at the time of closing operation, the operating mechanism 18
Piston rod 18c moves from left to right in the figure for a predetermined operation stroke at the highest speed of about 20 to 30 milliseconds, and the in-air rotary lever 16 and the in-gas rotary lever 14 are moved.
Rotates in the clockwise direction and the insulating operation rod 13 moves upward in the figure, so that the movable electrode portion B moves in the closing operation direction, which is the upward direction in the figure, at the highest speed of about 20 to 30 milliseconds. The movable arc contactor 5 contacts the fixed arc contactor 4 to connect the electric path.

In this case, the operating mechanism 18 of this embodiment uses the damper portion 18a and the damper gap 18b to move the piston rod 18c in the highest speed direction on the right side in the drawing, that is, to move the movable electrode portion B in the closing direction. In the operation of driving to, the movable arc contactor 5 of the movable electrode portion B is contacted with the fixed arc contactor 4 as shown in FIG.
Since the piston rod 18c is rapidly decelerated, the operating speed of the movable arc contactor 5 of the movable electrode portion B connected via the driving force direction conversion mechanism C is also rapidly decelerated.

Therefore, when the movable arc contact 5 and the fixed arc contact 4 come into contact with each other, the movable arc contact 5
Is sufficiently decelerated, the contactors 4 and 5 come into contact with each other at a sufficiently low speed, and the impact force generated at the time of contact can be sufficiently reduced. At the time of this contact, the operating rod 11 and the insulating operating rod 13 are
As shown in FIG. 2, since they are arranged on a substantially straight line, a mechanical force in the bending direction is hardly generated from the insulating operation rod 13 to the operation rod 11.

On the other hand, during the opening operation, contrary to the above-described closing operation, the piston rod 18c of the operating mechanism 18 moves from the right to the left in the figure for a predetermined operation stroke at a high speed of about 100 milliseconds. The movable electrode portion B moves at a high speed of about 100 milliseconds in the opening operation direction, which is the downward direction in the figure, and the electric path is separated.

[1-3] Effects of the Embodiment As described above, in this embodiment, as the operation mechanism 18, the operation mechanism of the conventional circuit breaker, which has already been proven, is used as it is, and Since it is possible to perform the closing operation at a high speed of 20 to 30 milliseconds required to be applied to the main circuit, it is possible to enhance the reliability of the switchgear.

That is, since the switchgear of this embodiment is connected to a surge absorber such as a lightning arrester, its requirements are as follows. First, at the time of closing operation, the surge absorber is connected to the main circuit without delay in the occurrence of transient overvoltage of the main circuit that accompanies the constant opening of the circuit breaker. However, it is required to perform the closing operation at a high speed of 20 to 30 milliseconds. On the other hand, in the opening operation, after the transient phenomenon is subsided, the sufficiently small current shunted by the surge absorbing device may be slowly interrupted, so that it is not necessary to operate the contactor as fast as in the closing operation.

Since the switchgear according to the present embodiment can be configured to have a time characteristic just opposite to the circuit breaker switching time characteristic from the above requirements, the conventional circuit breaker operating mechanism is used. Then, by converting the direction of the driving force by the driving force direction conversion mechanism C, the required condition can be easily satisfied. Note that, in general, the distance between contacts of a circuit breaker is shorter than that of other switchgear, so that it is possible to increase the distance of movement on the contact side by using an intervening lever, if necessary. .

Further, in the switchgear according to the present embodiment, when the movable arc contactor 5 is sufficiently decelerated immediately after the start of braking at the end of the closing operation, both contactors 4, 5 come into contact with each other. It is possible to sufficiently reduce the impact force generated when the two contacts 4 and 5 come into contact with each other, thereby making it less likely to be damaged. Further, when the closing operation is completed, the floating link type insulated operating rod 13 and the operating rod 11 are arranged in a substantially straight line, so that buckling due to a combination of bending and compression of the operating rod 11 is prevented. As a result, since it is not necessary to reinforce for reinforcement, as a result, the electrode movable part A can be lightened and a switchgear capable of operating at higher speed can be obtained.

[2] Second Embodiment ... FIG. 3 [2-1] Configuration of Embodiment FIG. 3 is a diagram showing a second embodiment of the switchgear according to the present invention. As shown in FIG. 3, an insulating gas G having an excellent insulating property such as SF ₆ gas is filled in the tank 1 of the ground potential arranged in the left-right direction in the drawing. In this tank 1, a fixed arc contact 4 and a fixed contact 21 are arranged coaxially with the tank 1, are configured as a fixed electrode portion A, and are insulated and supported by a support insulating cylinder 22. Fixed arc contactor 4 and contactor 21 in the tank 1
The movable arc contactor 5 and the movable contactor 23, which come into contact with and separate from the contactors 4 and 21, are provided at a position opposed to the tank 1.
Is arranged coaxially with, and is fixed to the operation rod 11 and the puffer cylinder 12 together with the insulating nozzle 6.
It is configured as a movable electrode portion B that operates integrally.
The movable electrode portion B that operates integrally is slidably fitted to the support member 24 fixed to the tank 1 and the puffer piston 19 supported by the support insulating cylinder 7. Further, the movable electrode portion B compresses the space formed between the puffer piston 19 and the puffer cylinder 12 at the time of the opening operation, so that the fixed arc contactor 4 and the movable arc contactor 5 are connected to each other via the insulating nozzle 6. It is designed to extinguish the arc by spraying it toward the arc generated during.

The end of the operating rod 11 opposite to the movable arc contact 5 is connected to one end of the insulating operating rod 13, and the other end of the insulating operating rod 13 is connected to one end of a connecting rod 25 penetrating the tank 1. It is connected. The insulated operating rod 13 and the connecting rod 25 are linearly and fixedly connected to the operating rod 11. Connecting rod 2
The other end of 5 is connected to the operating mechanism 18 via a driving force direction changing mechanism C including a link 27, a rotating lever 28, and a link 29 arranged in a mechanism portion 26 outside the tank 1. In this case, as the operating mechanism 18, the operating mechanism of the circuit breaker similar to that of the first embodiment is used, and the operating direction of the operating mechanism 18 is parallel to the operating direction of the movable electrode portion B. It is located in.

The driving force direction changing mechanism C will be described in more detail. The connecting rod 25 has an airtight seal 25a provided at the penetrating portion of the connecting rod 25 of the tank 1 so that the external space of the gas space in the tank 1 can be prevented. It is designed to move linearly while maintaining airtightness against. Further, the rotary lever 28 is rotatably provided by a rotary shaft 28a, and the links 27 and 29 are symmetrically provided on both sides of the rotary lever 28 so that the driving force of the operating mechanism 18 can be changed in the operating direction by 180 degrees. It is adapted to be reversed and transmitted to the movable electrode portion A.

On the other hand, above the fixed electrode portion A and the movable electrode portion B in the tank 1, there are provided respective lead-out portions for connection with an external device, and the insulating spacers 32 separate the gases. Connection conductors 33 and 34 are respectively arranged so as to penetrate these insulating spacers 32, and are electrically and mechanically connected to the fixed electrode portion A and the movable electrode portion B, respectively.

[2-2] Operation of the Embodiment The operation of the switchgear of this embodiment having the above-described structure is as follows. First, at the time of closing operation, the operating mechanism 18
Operates from the left to the right in the drawing at a maximum speed of about 20 to 30 milliseconds, the rotary lever 28 rotates counterclockwise, and the insulating operation rod 13 and the connecting rod 25 move from the right to the left in the drawing. In order to move, the movable electrode part B moves in the closing motion direction which is the left direction in the figure at the highest speed of about 20 to 30 milliseconds, and the movable arc contactor 5 and the movable contactor 23 thereof move to the fixed arc contactor 4 and The fixed contact 21 is contacted and the electric path is connected.

On the other hand, during the opening operation, contrary to the above-described closing operation, the operating mechanism 18 moves from right to left in the figure to 10
As a result of operating at a high speed of about 0 milliseconds, the movable electrode portion B moves at a high speed of about 100 milliseconds in the opening operation direction which is the right direction in the figure, and the electric path is separated.

[2-3] Effects of the Embodiment As described above, in the present embodiment, as in the first embodiment, as the operation mechanism 18, the operation mechanism of the conventional circuit breaker, which has a proven track record, is used. As it is used as it is, it is possible to perform the closing operation at a high speed of 20 to 30 milliseconds required for making the surge absorber into the main circuit, so that the reliability of the switchgear can be improved.

Particularly, in this embodiment, the operating mechanism 18
Is arranged such that its operation direction is parallel to the operation direction of the movable electrode portion B, so that a simple driving force direction conversion mechanism C using the rotary lever 28 and the two links 27, 29 is used for operation. Since the driving force of the mechanism 18 can be easily reversed, the number of parts of the entire device can be reduced, and the size and simplification of the entire device can be achieved.

Further, the lever ratio: L2 / L1 of the rotary lever 28 shown in FIG.
By further reducing the weight of the movable part including, it becomes possible to operate at higher speed. Further, if the lever ratio of the rotary lever 28 is reversed, low speed operation is possible. In this embodiment, since the connecting rod 25 is linearly airtightly slid, it is necessary to sufficiently reduce the sliding frictional force at the airtight seal 25a portion of the connecting rod 25.

[3] Third Embodiment FIG. 4 [3-1] Configuration of Embodiment FIG. 4 is a diagram showing a third embodiment of the switchgear according to the present invention. As shown in FIG. 4, the present embodiment is a modification in which the configuration around the mechanism portion 26 in the third embodiment is changed. That is, in this embodiment, the mechanism portion 26a is
It has an airtight structure, and the rotary shaft 28a of the rotary lever 28.
Is provided so as to penetrate the wall surface of the mechanism portion 26a, and is configured to rotate while maintaining airtightness inside the mechanism portion 26a. The rotary lever 28 is composed of an internal lever 28b arranged inside the mechanism portion 26a and an external lever 28c arranged on the atmosphere side. The inside and outside levers 28b and 28c are integrally fixed to the rotary shaft 28a. As a result, the entire body rotates as a rotary lever 28. The end of the inner lever 28b of the rotary lever 28 is connected to the connecting rod 25 via the link 27, and the end of the outer lever 28c is connected to the operating mechanism 18 via the link 29. Further, since the mechanism portion 26a has the airtight structure in this manner, the airtight seal 25a is not provided at the penetrating portion of the connecting rod 25 of the tank 1. The other parts are constructed in exactly the same manner as in the second embodiment.

[3-2] Operation and effect of the embodiment The operation of the switchgear of this embodiment having the above-described structure is the same as that of the second embodiment. Also in the present embodiment, as in the first and second embodiments, as the operating mechanism 18, the conventional operating mechanism of the circuit breaker, which has already been used, is used as it is, and the main circuit of the surge absorber is provided. Since the closing operation can be performed at a high speed of 20 to 30 milliseconds required for closing the switch, it is possible to enhance the reliability of the switchgear.

Further, in this embodiment, as in the second embodiment, the operating mechanism 18 is arranged so that its operating direction is parallel to the operating direction of the movable electrode portion B, so that the rotary lever 28 is provided. And the operating mechanism 18 using the simple driving force direction changing mechanism C using the two links 27 and 29.
Since the driving force of can be easily reversed, the number of parts of the entire device can be reduced, and the size and simplification of the entire device can be achieved.

Further, the rotary lever 28 shown in FIG.
By increasing the lever ratio L2 / L1 and minimizing the weight of the movable portion including the movable electrode portion B, a higher speed operation becomes possible. Further, if the lever ratio of the rotary lever 28 is reversed, low speed operation is possible.

In particular, in this embodiment, the mechanism portion 26a
Since it is configured to be airtight, it is not necessary to linearly hermetically slide the connecting rod 25a, so that the sliding frictional force of the connecting rod 25 can be sufficiently reduced as compared with the case of linearly hermetically sliding. Therefore, high-speed design becomes easier accordingly. In addition, the rotary shaft 28 of the rotary lever 28
Since a is hermetically sealed, the sealing performance can be improved as compared with the case where the linear sliding portion is hermetically sealed as in the second embodiment.

[4] Fourth Embodiment ... FIGS. 5 and 6 [4-1] Configuration of Embodiment FIG. 5 is a diagram showing a fourth embodiment of the switchgear according to the present invention. As shown in FIG. 5, the present embodiment is characterized in that the structure of the electrodes in the conventional switchgear is changed. That is, in FIG. 5, an insulating gas G having an excellent insulating property such as SF ₆ gas is filled in the tank 1 having a ground potential arranged vertically in the drawing. In the tank 1, a fixed side contact 35 and a movable side contact 38 are arranged coaxially with the tank 1 so as to face each other, and are supported by the supporting insulating cylinders 22 and 30, respectively. And
Between the fixed side contactor 35 and the movable side contactor 38, an intermediate contactor 36 for opening and closing the contactors 35, 38.
Are coaxially arranged and are connected to an operating mechanism (not shown) via an insulating operating rod 37. As this operating mechanism, the operating mechanism of the circuit breaker similar to that of the first embodiment is used. In addition, the fixed contact 35 and the movable contact 3
8, connecting conductors 33 and 34 are respectively connected, and these connecting conductors 33 and 34 are connected to an external device by penetrating an insulating spacer 32 provided in a lead-out portion for connection with an external device. ing.

More specifically, the insulation operating rod 3
7 is provided long so as to penetrate through the movable contact 38 and protrude, and an intermediate contact 36 is provided at the tip thereof. Then, the intermediate contact 36 and the fixed contact 3
5 and the movable-side contact 38 are both formed in a cylindrical shape, and their operating direction dimensions are substantially the same.
In addition, the outer diameter of the intermediate contact 36 is equal to that of the fixed contact 35.
And the inner diameter of the contact portion of the movable contact 38. Further, the distance between the fixed contact 35 and the movable contact 38 is shorter than the dimension of the intermediate contact 36 in the operating direction.

That is, contrary to the general movable contactor, the intermediate contactor 36 is housed in the fixed side contactor 35 in the open state as shown in FIG. By moving toward the movable contact 38, the circuit closing operation is performed. In this way, the closing direction of the intermediate contact 36 is the same as the opening direction of the normal circuit breaker. Therefore, in the present embodiment using the normal circuit breaker switching mechanism, this switching mechanism operates normally. Like the container, it is directly connected to the insulating operation rod 37, and the intermediate contact 36 is driven in the closing operation direction by the driving force of the opening / closing mechanism in the highest speed operation direction.

[4-2] Operation of the Embodiment The operation of the switchgear of the present embodiment having the above-mentioned structure is as follows. First, at the time of closing operation, the insulating operating rod 3 is operated by an operating mechanism (not shown) in FIG.
7 can be operated at the maximum speed of about 20 to 30 milliseconds toward the closed circuit direction in the lower part of the figure. As a result, the intermediate contactor 36 at the tip of the insulating operation rod 37 moves from the fixed side contactor 35 toward the movable side contactor 38 in a predetermined operation stroke at the highest speed of about 20 to 30 milliseconds, As shown in FIG. 6, the movable contact 38 is contacted, and the circuit is closed.

On the other hand, during the opening operation, contrary to the closing operation described above, the insulating operation rod 37 moves at a high speed of about 100 milliseconds toward the opening direction in the upper part of the figure, and as a result, the intermediate contact 36 becomes 100 in the opening operation direction, which is the upper part in the figure
It moves at a high speed of about a millisecond, is separated from the movable side contact 38, and then is housed in the fixed side contact 35 to be in the open state as shown in FIG.

[4-3] Effects of the Embodiment As described above, in this embodiment, the fixed side contact 35 is provided.
The intermediate contact 36 provided between the movable contactor 38 and the movable contactor 38 is configured to move in the direction opposite to that of the movable contactor of a normal opening / closing device to perform the opening / closing operation.
This is the same as the normal circuit breaker opening direction. Therefore,
Improve the reliability of the switchgear because the circuit breaker can be closed at the same high speed as the normal circuit breaker by using the reliable circuit breaker operating mechanism. You can

Further, in this embodiment, although the intermediate contactor 36 is provided in the electrode portion, the driving force direction changing mechanism as in the first to third embodiments is completely unnecessary, so that the entire apparatus is There is also an effect that the configuration can be remarkably downsized and simplified.

[5] Fifth Embodiment ... FIG. 7 FIG. 7 is a view showing a fifth embodiment of the switchgear according to the present invention. As shown in FIG. 7, in the present embodiment, a gas blowing hole 40 is provided in the intermediate contact 36 of the switchgear of the fourth embodiment, and the compression chamber is provided between the fixed side contact 35 and the intermediate contact 36. This is a modification in which 41 is provided. The other parts are constructed in exactly the same manner as in the fourth embodiment.

In this embodiment having such a structure, the following operation is obtained in addition to the same operation as that of the fourth embodiment. That is, during the opening operation,
The insulating gas is compressed in the compression chamber 41 by the movement of the intermediate contactor 36, and this insulating gas is passed through the gas blowing hole 40 provided in the intermediate contactor 36 and the movable contactor 3
8 and can be sprayed. Therefore, the current interruption capability of the switchgear can be improved.

[6] Sixth Embodiment ... FIG. 8 FIG. 8 is a view showing a sixth embodiment of the switchgear according to the present invention. As shown in FIG. 8, the present embodiment is a modification in which the movable side contact 38 of the switchgear of the fourth embodiment is provided with the magnetic field extinguishing coil 42. With such a configuration, a magnetic field is generated by the current flowing through the magnetic field extinguishing coil 42 during the opening operation, and this magnetic field drives the arc generated between the intermediate contact 36 and the movable side contact 38 to rotate at high speed. Can be made. Therefore, the current blocking capability of the switchgear can be improved.

[7] Seventh Embodiment FIG. 9 to FIG. 11 [7-1] Configuration of Embodiment FIG. 9 is a diagram showing a seventh embodiment of the switchgear according to the present invention. Only the configurations of A and the movable electrode portion B are shown. As shown in FIG. 9, in the present embodiment, the fixed contactor 43 and the movable contactor 44 are coaxially opposed to each other. The movable contact 44 is the fixed contact 4
3 is fixed to the operation rod 11 and the puffer cylinder 12 together with an insulating nozzle 6 arranged around the movable electrode part 3 and is configured as a movable electrode part B that operates integrally. The movable electrode portion B is slidably fitted to the fixed puffer piston 19 and is connected to an operating mechanism (not shown) via the insulating operating rod 13. In this case, as the operating mechanism of this embodiment, the same operating mechanism of the circuit breaker as in the first embodiment is used. Further, the movable electrode portion B compresses the gas in the space formed between the puffer piston 19 and the puffer cylinder 12 during the opening operation, and the compressed gas is
The arc generated between the fixed contact 43 and the movable contact 44 is blown through the insulating nozzle 6 to extinguish the arc.

On the other hand, the fixed electrode portion A is constructed as follows. That is, the fixed side shield 45 is arranged around the fixed contactor 43, and the fixed side shield 45 is
It is supported by the support member 46, and the fixed contactor 43 is provided so as to penetrate the support member 46. The tubular spring retainer 4 is provided between the fixed contact 43 and the fixed shield 45 of the support member 46.
7 is arranged, and a spring 48 is arranged inside the spring retainer 47. That is, the support member 4 of the fixed contactor 43
In the vicinity of the portion penetrating 6
And the second stoppers 49 and 50 are provided with a space therebetween, and the fixed contactor 4 including these stoppers 49 and 50 is provided.
A part of 3 is inserted into the spring retainer 47 such that the first stopper 49 engages with the tip of the spring retainer 47. The fixed contactor 43 is movable between a position where the first stopper 49 engages with the tip of the spring retainer 47 and a position where the second stopper 50 engages with the support member 46. Has become. The spring 48 is arranged in a space formed by the spring retainer 47, the first stopper 49, and the support member 46, and biases the fixed contactor 43 toward the movable contactor 44 via the first stopper 49. It is supposed to do.

[7-2] Operation of the Embodiment The operation of the switchgear of this embodiment having the above-described structure is as follows. First, at the time of circuit closing operation, the movable electrode unit B moves in the circuit closing operation direction in the upper part of the figure via the insulating operation rod 13 by the operation mechanism (not shown), and the movable contactor 44 moves to the fixed contactor 43 side. . When the movable contact 44 moves by a predetermined operation stroke, the movable contact 44 and the fixed contact 43 come into contact with each other as shown in FIG.

At this point, since the movable contactor 44 is operating at a very high speed, an impact force due to contact is generated between the movable contactor 44 and the fixed contactor 43. In the embodiment, this impact force can be absorbed by the spring 48 provided between the fixed contact 43 and the support member 46. Hereinafter, this operation will be described in more detail.

First, since the movable contactor 44 is mechanically connected to the outer periphery of the fixed contactor 43 so as to be in contact with the outer periphery of the fixed contactor 43 and maintains an electrically contacted state, the movable contactor 44 has a spring property in the outer peripheral direction. Is configured. Therefore, in the open state, the inner diameter of the movable contactor 44 is the same as the corresponding fixed contactor 43.
It is slightly smaller than the outer diameter of. On the other hand, since the movable contactor 44 operates at high speed at the time of contact, in the conventional fixed contactor configuration in which the spring 48 is not provided, a considerable impact is generated between the fixed contactor 43 and the movable contactor 44. It is expected that force will be generated. On the other hand, in the present embodiment, since the fixed contact 43 is movable and the spring 48 is provided between the fixed contact 43 and the support member 46, the movable contact 44 is fixed to the fixed contact 43. When contacting at a high speed, the fixed contactor 43 moves so as to compress the spring 48 in response to the operation of the movable contactor 44, and the impact force at the time of contact is absorbed.

After such contact, when the final closed state is reached, as in the first embodiment, the damper of the operating mechanism (not shown) acts to close the moving speed, that is, the movable contact. The speed of the child 44 becomes slower, and correspondingly, the speed of the fixed contactor 43 also becomes slower. Further, in the closed state as shown in FIG. 11, since the second stopper 50 engages with the support member 46 to stop the movement of the fixed contact 43, the fixed contact 43 and the movable contact 44 are electrically connected. The closing operation is completed in a completely connected form.

During the opening operation, the movable electrode portion B moves in the lower opening operation direction in the drawing by the operating mechanism (not shown) through the insulating operation rod 13 to move the movable contactor 44.
Moves to the side opposite to the fixed contactor 43. Movable contactor 44
When a predetermined operation stroke is moved, the movable contactor 44 and the fixed contactor 43 are separated from each other, and finally an open circuit state as shown in FIG. 9 is obtained.

[7-3] Effects of the Embodiment As described above, in this embodiment, the fixed contact 43 is movable, and the spring 48 is provided between the fixed contact 43 and the support member 46. As a result, when the circuit is closed at high speed, the spring 48 can absorb the impact force acting between the contacts 43 and 44 at the time of contact. Therefore, the reliability of the high-speed closing operation can be improved.

[8] Eighth Embodiment FIG. 12 [8-1] Configuration of Embodiment FIG. 12 is a view showing an eighth embodiment of the switchgear according to the present invention. As shown in FIG. 8, this embodiment is similar to the first
-As in the seventh embodiment, instead of mechanically closing the contacts mechanically quickly, the time required for insulation breakdown between the contacts is shortened, and the electrical closing time is shortened. For that purpose, the fixed arc contact is provided with a trigger electrode.

That is, as shown in FIG. 12, the movable arc contactor 51 and the fixed arc contactor 52 are arranged at a position facing the movable arc contactor 51. One end of the movable arc contactor 51 is connected to an operating mechanism (not shown). A trigger electrode 54 is embedded in the central axis portion of the fixed arc contact 52 via an insulating tube 53, and a power source 56 for applying a trigger and a timer are provided between the trigger electrode 54 and the fixed arc contact 52. The switch 55 is connected in series. The timer switch 55 is set so as to be closed within a fixed time in synchronization with the closing command. The breakdown voltage between the trigger electrode 54 and the fixed arc contact 52 is set to be lower than the voltage generated by closing the power supply 56.

[8-2] Operation of the Embodiment The operation of this embodiment having the above-mentioned structure is as follows. That is, when the switchgear is closed, the movable arc contactor 51 is driven by an operation mechanism (not shown) along with a closing command, and the closing operation is started toward the fixed arc contactor 52. At the same time, the timer switch 55
Is closed, and a voltage is applied between the trigger electrode 54 and the fixed arc contact 52. In this case, the breakdown voltage between the trigger electrode 54 and the fixed arc contact 52 is set to be lower than the voltage generated by closing the power supply 56, so that the trigger electrode 54 and the fixed arc contact 5
Dielectric breakdown is generated between the two and sparks are generated. This spark induces a dielectric breakdown between the fixed arc contact 52 and the movable arc contact 51, and a pre-arc occurs earlier than a pre-arc that occurs during a normal closing operation to electrically connect the circuits. That is, the closing time of the switchgear can be shortened. It is not necessary to extinguish the arc because the contacts 51 and 52 are mechanically connected to each other and the arc spontaneously extinguishes after a certain period of time has elapsed after the pre-arc has occurred.

[8-3] Effects of the Embodiment As described above, in this embodiment, the trigger electrode 54 provided in the fixed electrode portion A applies a pulse from the outside, so that the contact 51, It is possible to electrically turn on the switchgear quickly by causing the dielectric breakdown between 52 and generating a long so-called pre-arc time.
Therefore, it is not necessary to significantly improve the speed of the movable arc contactor 51, and the charging time can be markedly shortened, so that the impact at the time of charging is not so large. Further, as the operation mechanism, the operation mechanism of the conventional circuit breaker can be applied as it is, and it is possible to provide a highly reliable switchgear which can be closed at high speed.

[9] Other Embodiments The present invention is not limited to the above-mentioned embodiments, and various other modified examples can be implemented. For example, the specific configuration of the driving force direction changing mechanism C of the first and second embodiments can be changed appropriately.
Further, the fixed side contactor 3 in the third to fifth embodiments.
5, the specific configurations of the movable contactor 38 and the intermediate contactor 36 can be changed as appropriate.

On the other hand, in the seventh embodiment, the structure for providing the shock absorbing spring 48 on the fixed electrode portion A side has been described. However, the structure for providing the shock absorbing spring on the movable electrode portion B side, or A structure in which springs are provided in both the fixed electrode portion A and the movable electrode portion B is also possible, and in this case also, the same operation and effect as in the seventh embodiment can be obtained.
Further, it is also possible to combine the constitution of providing the trigger electrode of the eighth embodiment with the constitution of other embodiments, and in this case, a synergistic action and effect can be obtained.

Further, according to the present invention, in order to increase the relative operation speed between the contacts during the closing operation and the opening operation, the fixed contact is interlocked with the movable contact in the opposite direction to the movable contact. It is also possible to apply to a so-called dual-motion type switchgear that is moved to.

[0087]

As described above, according to the present invention, the driving force direction changing mechanism for changing the direction of the driving force of the operating mechanism is provided, or the intermediate contactor is provided between the facing contactors. The contactor is configured to open and close in the opposite direction to the movable contactor of a normal switchgear to enable high-speed closing operation by utilizing the high-speed operation of a conventional circuit breaker operating mechanism. By providing a trigger electrode on the contactor to enable shortening the electrical closing time, it is possible to close at a high speed of 20 to 30 milliseconds from the closing command, and especially to the system of the surge absorber. It is possible to provide a highly reliable switchgear suitable for loading.

[Brief description of drawings]

FIG. 1 is a schematic cross-sectional view showing a first embodiment of a switchgear according to the present invention.

FIG. 2 is a schematic diagram of the opening / closing device of FIG.

FIG. 3 is a schematic cross-sectional view showing a second embodiment of the opening / closing device of the present invention.

FIG. 4 is a schematic sectional view showing a third embodiment of the opening / closing device of the present invention.

FIG. 5 is a view showing a fourth embodiment of the opening / closing device of the present invention, and is a schematic sectional view particularly showing an open state.

6 is a schematic cross-sectional view showing a closed state of the switchgear of FIG.

FIG. 7 is a schematic sectional view showing a fifth embodiment of the opening / closing device of the present invention.

FIG. 8 is a schematic sectional view showing a sixth embodiment of the opening / closing device of the present invention.

FIG. 9 is a view showing a seventh embodiment of the opening / closing device of the present invention, and is a schematic cross-sectional view particularly showing an open state.

10 is a schematic cross-sectional view showing the closing operation of the switchgear of FIG.

11 is a schematic cross-sectional view showing a closed state of the switchgear of FIG.

FIG. 12 is a schematic sectional view showing an eighth embodiment of the opening / closing device of the present invention.

FIG. 13 is a structural diagram showing an example of a conventional circuit breaker.

[Explanation of symbols]

 A ... Fixed electrode part B ... Movable electrode part C ... Movement direction conversion mechanism 1, 1a ... Tank 2 ... Insulating support member 3 ... Connection conductor 4 ... Fixed arc contact 5 ... Movable arc contact 6 ... Insulation nozzle 11 ... Operation rod 12 ... Puffer cylinder 13 ... Insulation operating rod 14 ... Gas rotary lever 15 ... Rotating shaft 16 ... Air rotary lever 17 ... Floating link 18 ... Operation mechanism 19 ... Puffer piston 20 ... Ground conductor 21 ... Fixed contact 22 ... Support insulation Cylinder 23 ... Movable contact 24 ... Support member 25 ... Connecting rod 26, 26a ... Mechanism part 27, 29 ... Link 28 ... Rotating lever 32 ... Insulating spacer 33, 34 ... Connection conductor 35 ... Fixed side contact 36 ... Intermediate contact 37 ... Insulation operation rod 38 ... Movable side contactor 40 ... Gas blowing hole 41 ... Compression chamber 42 ... Magnetic field extinguishing coil 43 ... Fixed contactor 44 ... Movable contactor 45 ... Fixed side shield 46 ... Supporting member 47 ... Spring retainer 48 ... Spring 49,50 ... Stopper 51 ... Movable arc contactor 52 ... Fixed arc contactor 53 ... Insulation tube 54 ... Trigger electrode 55 ... Timer switch 56 …Power supply

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tetsuya Nakamoto 2-1, Ukishima-cho, Kawasaki-ku, Kawasaki-shi, Kanagawa Stock company Toshiba Hamakawasaki factory (72) Yasushi Hayashi 2 Ukishima-cho, Kawasaki-ku, Kawasaki-shi, Kanagawa No. 1 Stock company Toshiba Hamakawasaki factory

Claims (11)

[Claims] 1. A first and a second contact, which can be electrically contacted and separated, are arranged to face each other in a container enclosing an insulating medium, and at least one of the contacts is electrically insulated from the container. An operating mechanism that is configured to be connectable to an external electric circuit and that opens and closes between the first contact and the second contact by driving the first contact is provided outside the container. In the provided opening / closing device, the operation mechanism is provided so as to be capable of reciprocating, and one operation direction is an operation mechanism configured to be a maximum speed operation direction that operates at a higher speed than the other operation direction. A driving force direction changing mechanism for changing the direction of the driving force of the operating mechanism in the highest speed operation direction to a driving force in the closing motion direction of the first contactor and transmitting the driving force. Characteristic switchgear. 2. An operating rod integrally fixed to the first contactor is provided, and the operating rod is connected to the operating mechanism via the driving force direction changing mechanism, and the driving force direction changing mechanism is provided. The mechanism includes a rotary lever that changes the direction of the driving force of the operating mechanism, and a floating link type insulated operating rod connected between the rotary lever and the operating rod, wherein the operating rod and the insulating operating rod are The first contactor is arranged so as to be substantially linearly aligned at a position where the first contactor contacts the second contactor.
The switchgear according to the item. 3. The operating mechanism is arranged such that its operating direction and the operating direction of the first contactor are parallel to each other, and the driving force direction changing mechanism changes the driving force direction of the operating mechanism. The opening / closing device according to claim 1, further comprising a rotating lever for reversing. 4. The operation mechanism is configured such that the first mechanism operates during the closing operation.
3. The braking device for rapidly decelerating the operating speed of the first contactor immediately before the contactor of the first contacting the second contactor is provided. The switchgear according to item 3. 5. A container in which an insulating medium is enclosed is provided with first and second contacts that are electrically contactable and separable, and at least one of the contacts is electrically insulated from the container. An opening / closing device configured to be connectable to an external electric circuit and provided with an operating mechanism for opening / closing between the first and second contacts outside the container, wherein the first contact is The movable contact is fixedly provided on the operation mechanism side, and the second contact is a fixed contact that is fixedly provided at a position facing the movable contact. An intermediate contact that moves along the axial direction of these contacts to open and close the contacts is arranged between the side contact and the fixed contact, and this intermediate contact is the movable contact. Is connected to the operating mechanism via an insulating operating rod passing through the In the road state, it is in a position where it contacts only the fixed side contact and separates from the movable side contact, and when it is closed, it moves toward the movable side contact, and in the closed state it moves at both ends. An opening / closing device configured so as to be in a position in contact with both the side contact and the fixed side contact. 6. Between the intermediate contactor and the fixed side contactor, when the intermediate contactor is moved toward the fixed side contactor during a circuit opening operation, the gas between these contactors is compressed, and the intermediate contactor is compressed. The switchgear according to claim 5, wherein a compression chamber for spraying is formed between the contactor and the movable contactor. 7. The switchgear according to claim 5, wherein a magnetic field extinguishing coil is provided near the tip of the movable contact. 8. A container enclosing an insulating medium is provided with first and second contacts that can be electrically contacted and separated so as to face each other, and at least one of the contacts is electrically insulated from the container. A third contactor configured to be connectable to an external electric circuit and provided outside the container, the first contactor or between the first contactor and the second contactor. An opening / closing device provided with an operation mechanism for driving the first contact and the second contact to open and close the second contact is provided with a support member for movably supporting the second contact. A switch is arranged between the contact and a spring, and the spring is configured to urge the second contact toward the first contact. 9. A container enclosing an insulating medium is provided with first and second electrically contactable and separable contact elements facing each other, and at least one of the contact elements is electrically insulated from the container. A third contactor configured to be connectable to an external electric circuit and provided outside the container, the first contactor or between the first contactor and the second contactor. An opening / closing device provided with an operation mechanism for driving the first contactor to open and close between the first and second contactors is provided with a support member for movably supporting the first contactor. An opening / closing device, wherein a spring is arranged between the contact and the contact, and the spring is configured to urge the first contact toward the second contact. 10. A container enclosing an insulating medium is provided with first and second electrically contactable and detachable contacts facing each other, and at least one of the contacts is electrically insulated from the container. A third contactor configured to be connectable to an external electric circuit and provided outside the container, the first contactor or between the first contactor and the second contactor. In an opening / closing device provided with an operation mechanism for driving the first contact element to open and close between the first and second contact elements, the first contact element is arranged on the operation mechanism side, and the first contact element is An operating rod is provided which is arranged in a penetrating manner and connects the third contactor to the operating mechanism, and a spring is disposed between the operating rod and the third contactor. Opening and closing, characterized in that the contactor is configured to be urged toward the first contactor side. Location. 11. A container enclosing an insulating medium is provided with first and second electrically contactable and separable contact elements facing each other, and at least one of the contact elements is electrically insulated from the container. A third contactor configured to be connectable to an external electric circuit and provided outside the container, the first contactor or between the first contactor and the second contactor. In an opening / closing device provided with an operating mechanism for driving between the first and second contactors by driving the first contactor, the first contactor is arranged on the operating mechanism side, and the second contactor A trigger electrode is provided inside via an insulating tube, and a power source for trigger application and a timer switch are connected in series to the second contactor and the trigger electrode. It is set so as to close the circuit in synchronization with the second connection. Child and switchgear breakdown voltage is characterized by being set to be lower than the voltage generated when the closing said power supply between the trigger electrodes.