JP2006339023A - Power switching device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a power switching device capable of materializing prescribed contact-making and separating action in a contact part with low output and a simple structure by using rotational drive. <P>SOLUTION: This power switching device is equipped with a cylinder 25 filled with an arc extinguishing medium, a movable contact 24 in which a contact part 24a rotationally driven by a rotary drive shaft 21 provided on the same axis as the axis of the cylinder 25 to move on a rotation track around the axis of the cylinder in the inside of the cylinder 25, and a stationary contact 29 in which a contact part 29a disposed on the inner surface of the cylinder 25 correspondingly to the rotation track of the contact part 24a provided in the movable contact 24. The contact part 24a of the movable contact 24 is brought into contact with and separated from the contact part 29a of the stationary contact 29 by rotational drive of the movable contact 24 by the rotary drive shaft 21 to make switching action. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a power switchgear, and more particularly, to a power switchgear used for system switching, device maintenance, and fault current interruption in a power system.

A basic configuration of a puffer-type gas circuit breaker in which an opening or closing operation is performed by an operation member that moves in the axial direction is widely known as a prior art (see, for example, Patent Document 1).
FIG. 9 in this Patent Document 1 shows a cross-sectional side view of a main part when the puffer-type gas circuit breaker is turned on, and FIG. 10 shows a side cross-sectional view of a main part when the puffer-type gas circuit breaker is opened.

In these figures, the tank is filled with SF ₆ gas having high electrical insulation. The fixed arc contact 11, the main fixed contact 1 and the piston 15 are fixed in the tank 5. The movable arc contact 9, the main movable contact 2 and the puffer cylinder 10 are fixed to an operation rod 13 as an operation member.

  On the other hand, an insulating rod 7 is connected to an output lever 6 attached to an operating device (not shown). The lever 8 pivotally supported in the tank 5 is connected to the insulating rod 7 and is also connected to the operation rod 13 via a link.

Next, the opening operation will be described.
FIG. 9 shows a closed state of the circuit breaker. When the circuit breaker is opened, the output lever 6 of the operating device is rotated clockwise, the insulating rod 7 is moved downward in the figure, and the lever 8 is rotated clockwise. Thus, the operating rod 13 is moved in the right direction in the figure. Here, the lever 8 converts the vertical movement of the insulating rod 7 into the horizontal direction of the operating rod 13 and is transmitted.

Due to the movement of the operating rod 13, the movable arc contact 9 and the main movable contact 2 provided integrally therewith are driven together. At this time, the main fixed contact 1 and the main movable contact 2 are dissociated first, and then the fixed arc contact 11 and the movable arc contact 9 are separated, and the SF ₆ gas in the puffer cylinder 10 is compressed by the piston 15 to form a pair of arc contacts. 11 and 9 is blown to an arc (not shown), the arc is extinguished, and the interruption is completed. This open state is shown in FIG.

  The closing operation is performed as follows. In FIG. 10, when the output lever 6 is rotated counterclockwise by an operating device (not shown), the insulating rod 7 linked thereto moves upward in the figure, and the lever 8 rotates counterclockwise. Then, the operating rod 13 is moved in the left direction in the figure. Due to the movement of the operating rod 13, the movable arc contact 9 and the fixed arc contact 11 are brought into contact with each other, and then the main movable contact 2 and the main fixed contact 1 are brought into contact with each other to complete the closing. This closed state is as shown in FIG.

JP 2003-217408 A (page 2-3, FIG. 9-10)

In a conventional puffer-type gas circuit breaker, current interruption is performed by applying a rotational operation force generated by an operation device such as a hydraulic pressure, a spring, or an electric motor through the output lever 6, the insulating rod 7, the lever 8, and the operation rod 13 in the horizontal direction. , The puffer cylinder 10 is linearly driven, the movable arc contact 9 is separated from the fixed arc contact 11, and the arc generated between the pair of arc contacts is compressed in the puffer cylinder 10 by the piston 15. SF ₆ gas is sprayed. For this reason, the linear movement of the movable contact 9 and the puffer cylinder 10 converts the rotational operating force into a linear driving force via a number of operating mechanisms, resulting in a loss of operating force and an increase in the number of parts. A highly reliable, high output operating device was required.

In addition, in order to obtain the SF ₆ gas spraying pressure necessary for arc extinguishing, the SF ₆ gas in the puffer cylinder 10 is sufficiently compressed by the piston 15, and especially in the case of a large current interruption, the puffer is used by the arc energy. It is necessary to expand and compress the SF ₆ gas in the cylinder 10 to improve the spraying force of the SF ₆ gas. For this reason, since the time required for the movement of the puffer cylinder 10 and the effective use of the arc energy, at least an arc continuation time (hereinafter referred to as an arc time) of a half cycle or more in the current application cycle is required. Difficulty in selecting the arc time width for securing electric durability due to the consumption of the movable arc contact 9 and the fixed arc contact 11 by arc and effective use of arc energy necessary for interruption is a problem.

  The present invention has been made to solve the above-described problems, and provides a power switchgear device capable of realizing a predetermined contact / separation operation at a contact portion by a rotational drive with a low output and a simple configuration. Objective.

  In the power switchgear apparatus according to the present invention, a container filled with an arc extinguishing medium, a first contact means provided with a contact portion that is rotationally driven by a drive means inside the container and moves on a predetermined rotation trajectory, A second contact means provided with a contact portion disposed corresponding to the rotation path of the contact portion provided in the first contact means; and by the rotational drive of the first contact means by the drive means. The contact portion of the first contact means and the contact portion of the second contact means are contacted and separated to perform an opening / closing operation.

  According to the present invention, it is possible to provide a power switchgear device capable of realizing a predetermined contact / separation operation at a contact portion by a rotational drive with a low output and a simple configuration.

Embodiment 1 FIG.
A first embodiment of the present invention will be described with reference to FIGS. FIG. 1 shows a configuration in the first embodiment, and is a cross-sectional view showing a configuration in a closed state. FIG. 2 is a diagram for explaining the shut-off process in the first embodiment, and FIG. 2A is a waveform diagram showing the input pulse waveform to the electric motor in the first embodiment in comparison with the current waveform. FIG. 2B is a cross-sectional view showing a configuration in the blocking process in the first embodiment.

In FIG. 1 which shows the structure in the closed state of the rotary switchgear apparatus according to Embodiment 1 of the present invention, the operating mechanism section includes a piston 22 attached to the rotary drive shaft 21, and the piston 22 and the pressing spring 23. And a movable contact 24 that operates integrally.
Further, the fixing mechanism portion is made of polytetrafluoroethylene known as Teflon (registered trademark) on the inner circumference and the insulator outer coat 26 on the outer circumference of the cylinder 25 concentric with the rotation track of the movable contact 24. The sliding coating 27 made of fluororesin and a fixed contact 29 are formed. The space between the cylinder 25 and the piston 22 is filled with SF ₆ gas 28, and the fixed contact 29 is connected to the connecting conductor 30.

  The movable contact 24 has a contact portion 24a, an annular base portion 24b surrounding the rotary drive shaft 21 and fixed to the outer peripheral surface thereof, and one end fitted to the annular base portion 24b, and the contact portion 24a is directed outward by the free end. A pressing spring 23 is provided for biasing. The pressing spring 23 presses the contact portion 24a against the fixed contact 29 with a predetermined contact pressure when the contact portion 24a contacts the fixed contact 29, and the contact portion 24a is properly applied to the sliding coating 27 when the movable contact 24 is driven to rotate. The movable contact 24 is smoothly rotated by pressure contact with pressure.

In FIG. 2 for explaining the shut-off process of the rotary switchgear apparatus according to Embodiment 1 of the present invention, the rotational operation force generated by an electric motor (not shown) composed of a pulse motor driven by pulse input is rotated. By being directly transmitted to the drive shaft 21 and performing rotational drive, the movable contact 24 integrated with the piston 22 attached to the rotational drive shaft 21 is rotationally driven and separated from the fixed contact 29 arranged concentrically. An arc 31 is generated between the pair of contacts 24 and 29. Current arc extinguishing is performed by blowing SF ₆ gas 28 flowing inside the cylinder 25 to the arc 31 by the piston 22 integrated with the movable contact 24.

  Here, the driving of the electric motor is started from a small current phase near the current zero point by performing the opening phase control on the current phase waveform 32, and the maximum output as shown in the electric motor pulse step 33 is obtained. It is generated instantaneously, the piston 22 and the movable contact 24 are rotated at a high speed, and when the current zero point passes after the arc is generated, the movable contact 24 passes through the insulator jacket 27 and cuts off the current with the optimum arc time.

  If the timing at which the contact portion 24a of the movable contact 24 and the contact portion 29a of the fixed contact 29 are separated by the rotational drive of the movable contact 24 by the rotational drive shaft 21 driven by the electric motor is a minute current period near the current zero point. An arc is not generated by the back electromotive force generated by changing the insulation characteristic between the contact part 24a of the movable contact 24 and the contact part 29a of the fixed contact 29 from the characteristic as a conductor to the characteristic as a resistor. The current can be cut off.

When the circuit formed by the fixed contact 29 connected to the pair of connecting conductors 30 is turned on again, the movable contact 24 is paired via the annular base 24b with the contact portion 24a contacting the fixed contact 29. The connecting conductor 30 is rotationally driven to a position where it is bridged.
When the contact is not re-inserted, the movable contact 24 is stopped at an intermediate portion where the contact portion 24 a is not provided with the fixed contact 29.

According to the first embodiment of the present invention, a cylindrical insulating container including a cylinder 25 having an insulating casing 26 filled with an arc extinguishing medium such as SF _6, and the inside of the cylindrical insulating container including the cylinder 25 are provided. The cylinder 25 is driven to rotate by a driving means comprising a rotary drive shaft 21 that is driven to rotate by an electric motor (not shown) provided on the same axis as the axis of the cylindrical insulating container. A first contact means comprising a movable contact 24 provided with a contact portion 24a that moves on a rotating track centering on the axis of the cylindrical insulating container, and a contact provided on the first contact means comprising the movable contact 24. A fixed contact provided with a contact portion 29a disposed on the inner surface of a cylindrical insulating container composed of the cylinder 25 corresponding to the rotation trajectory of the portion 24a. The second contact means composed of 29 and the inner surface of the cylindrical insulating container composed of the cylinder 25 correspond to the rotation orbit of the contact portion 24a of the first contact means composed of the movable contact 24 and the second contact means composed of the movable contact 24. A sliding coating 27 made of a fluororesin made of polytetrafluoroethylene provided extending in the moving direction of the contact portion 24a of the first contact means, and the movable by the drive means comprising the rotary drive shaft 21; The contact portion 24a of the first contact means consisting of the movable contact 24 and the contact portion 29a of the second contact means consisting of the fixed contact 29 are opened and closed by rotating the first contact means consisting of the contact 24. In addition to the operation, the second contact portion 24a of the first contact means comprising the movable contact 24 and the fixed contact 29 is provided. Since the sliding contact 27 made of the fluororesin made of polytetrafluoroethylene smoothly performs the contact / separation operation of the contact means with the contact portion 29a, a predetermined contact / separation operation at the contact portion by rotational driving is performed. Can be realized with a simple configuration with low output, and a power switchgear device that can smoothly perform the switching operation can be provided.

  Further, according to Embodiment 1 of the present invention, in the configuration of the preceding paragraph, there is provided drive means comprising a rotational drive shaft 21 for rotationally driving the first contact means comprising the movable contact 24, and the rotational drive shaft 21 is provided with the rotational drive shaft 21. Because it is equipped with an electric motor (not shown) consisting of a pulse motor that is directly connected, it can be used for electric power that can realize a predetermined contact and separation operation at the contact portion with a low output and a simple configuration by rotational drive by an electric motor directly connected to the rotating shaft. An opening / closing device apparatus can be provided.

  Furthermore, according to Embodiment 1 of the present invention, in the configuration of the preceding paragraph, the electric motor directly connected to the rotary drive shaft 21 that rotationally drives the first contact means composed of the movable contact 24 is phase-controlled. Therefore, it is possible to provide a power switchgear device that can realize a predetermined contact / separation operation at the contact portion with a low output and a simple configuration by rotational driving by phase control of an electric motor directly connected to the rotating shaft.

  According to the first embodiment of the present invention, in the configuration of the preceding paragraph, the contact portion 24a of the first contact means comprising the movable contact 24 and the contact portion 24a by the rotational drive of the first contact means comprising the movable contact 24 The timing at which the contact portion 29a of the second contact means composed of the fixed contact 29 is separated is a minute current period near the current zero point, and the contact portion 24a of the first contact means composed of the movable contact 24 and the fixed contact 29 The electric current is interrupted without generating an arc due to the counter electromotive force generated by changing the insulation characteristic between the second contact means and the contact portion 29a of the second contact means from the characteristic as a conductor to the characteristic as a resistor. As a result, it is possible to realize a predetermined contact / separation operation at the contact portion by rotational drive without generating an arc with a low output and a simple configuration. It is possible to provide the use switchgear apparatus.

Furthermore, according to Embodiment 1 of the present invention, in the configuration of the preceding paragraph, a cylindrical shape provided with an insulator jacket 26 that is rotationally driven according to the rotational drive of the first contact means comprising the movable contact 24. It is integrated with the first contact means comprising the movable contact 24 for causing an arc extinguishing action by flowing an arc extinguishing medium such as SF ₆ filled in the container composed of an insulating container comprising a cylinder 25. Since the arc-extinguishing medium flow means comprising the piston 22 is provided, the power switchgear device that can realize a predetermined contact / separation operation at the contact portion by a rotational drive with a low output and a simple configuration and can reliably perform the arc-extinguishing operation. Can be provided.

Embodiment 2. FIG.
A second embodiment of the present invention will be described with reference to FIG. FIG. 3 is a cross-sectional view showing a configuration in the second embodiment. FIG. 3A shows a closed circuit state. FIG.3 (b) has shown the open circuit or the earthing | grounding state.
In the second embodiment, the configuration other than the specific configuration described here has the same configuration contents as the configuration in the first embodiment described above, and exhibits the same operation. In the drawings, the same reference numerals indicate the same or corresponding parts.

In FIG. 3 for explaining the closed state and the open or grounded state of the rotary switching device according to Embodiment 2 of the present invention, FIG. 3 (a) shows the closed state.
A fixed contact 29R, 29S, and 29T is provided on the inner peripheral surface of the cylinder 25 that is configured by the insulator outer cover 26 and that has the sliding coating 27 on the inner peripheral surface.
Contact portions 24R and 24S are provided on the movable contact 24 that surrounds the rotary drive shaft 21 and is attached to the outer peripheral surface of the rotary drive shaft 21.

  Here, the fixed contacts connected to the connection conductor 30 are the lower two fixed contacts 29R and 29S, and the movable contact 24 is provided with the contact portions 24R and 24S only at the two lower portions as a pair. As shown in FIG. 3A, a closed circuit state is formed via the electric circuit in the cylinder 25 and the connection conductor 30. In this closed state, the contact portion 24R of the movable contact 24 contacts the fixed contact 29R, the contact portion 24S of the movable contact 24 contacts the fixed contact 29S, and the paired connecting conductors 30 are bridged by the movable contact 24. It is connected.

  Next, through the same shut-off process as shown in FIG. 2 in the first embodiment, the circuit is opened or grounded as shown in FIG. In this open or grounded state, the contact portion 24R of the movable contact 24 comes into contact with the fixed contact 29S, and the contact portion 24S of the movable contact 24 comes into contact with the fixed contact 29T, and one of the paired connection conductors 30 is formed. The connection conductor 30 is in a non-connected state, or is connected to the fixed contact 29T connected to the grounded portion by a movable contact 24.

According to the second embodiment of the present invention, a cylindrical insulating container comprising a cylinder 25 having an insulating sheath 26 filled with an arc extinguishing medium such as SF ₆ , the inside of the cylindrical insulating container comprising the cylinder 25. The cylinder 25 is driven to rotate by a driving means comprising a rotary drive shaft 21 that is driven to rotate by an electric motor (not shown) provided on the same axis as the axis of the cylindrical insulating container. The first contact means including the movable contact 24 provided with the contact portions 24R and 24S that move on the rotation path around the axis of the cylindrical insulating container, and the first contact means including the movable contact 24 are provided. Corresponding to the rotation trajectories of the contact parts 24R and 24S, a contact part 29a disposed on the inner surface of the cylindrical insulating container comprising the cylinder 25 is provided. The second contact means composed of the fixed contacts 29R, 29S, 29T, the inner surface of the cylindrical insulating container composed of the cylinder 25, and the rotation trajectory of the contact portions 24R, 24S of the first contact means composed of the movable contact 24. Correspondingly, a sliding coating 27 made of a fluororesin made of polytetrafluoroethylene provided extending in the moving direction of the contact portions 24R, 24S of the first contact means made of the movable contact 24 is provided, The first contact means comprising the movable contact 24 is driven by the drive means comprising the rotational drive shaft 21 and the first contact means 24R, 24S of the first contact means comprising the movable contact 24 and the fixed contact 29 comprise the first contact means. The first contact made of the movable contact 24 from a closed state by joining the contact portions 29R and 29S of the second contact means. The contact portion 24R, 24S of the contact means and the contact portion 29S, 29T of the second contact means composed of the fixed contact 29 perform an opening / closing operation for shifting to an open circuit or a grounded state, and the second contact portion of the movable contact 24. The sliding movement of the contact portions 24R, 24S of the first contact means and the contact portions 29R, 29S, 29T of the second contact means made of the fixed contact 29 is made of a fluororesin made of polytetrafluoroethylene. Since the coating 27 is smoothly performed, the power switchgear capable of realizing a predetermined contact / separation operation for shifting between the closed state and the open state or the grounded state at the contact portion by a rotational drive with a low output and a simple configuration. An apparatus can be provided.

Embodiment 3 FIG.
A third embodiment of the present invention will be described with reference to FIGS. FIG. 4 is a cross-sectional view showing the configuration in the third embodiment and showing the configuration in a closed state. FIG. 5 is a diagram for explaining the shut-off process in the third embodiment, FIG. 5 (a) is a waveform diagram for explaining the shut-off process in the third embodiment, and FIG. 5 (b) is a diagram for explaining the embodiment. 3 is a cross-sectional view showing a configuration in a blocking process in FIG.
In the third embodiment, the configuration other than the specific configuration described here has the same configuration contents as the configuration in the first embodiment described above, and has the same function. In the drawings, the same reference numerals indicate the same or corresponding parts.

In FIG. 4 for explaining the circuit breaker of the rotary switchgear apparatus according to the third embodiment of the present invention, the operation mechanism section includes a rotation drive shaft 21, a piston 22 that performs planetary motion, and the piston 22 The movable contact 24 is configured to operate integrally with the pressing spring 23.
Further, the fixed mechanism portion is composed of an insulator 26 and a fixed contact 29 that form a cylinder 25 on the same orbit as the rotation track of the movable contact 24, and SF ₆ gas 28 is filled between the cylinder 25 and the piston 22. The fixed contact 29 is connected to the connection conductor 30.

In FIG. 5 for explaining the shut-off process of the rotary opening / closing device according to the third embodiment of the present invention, the rotational operation force generated by the electric motor is directly transmitted to the rotational drive shaft 21 to perform rotational drive. A movable contact 24, which is attached to the rotational drive shaft 21 and integrated with a piston 22 that performs planetary motion, is rotationally driven to be separated from a fixed contact 29 disposed on the same track, and an arc 31 between the pair of contacts 24, 29. Will occur. Current extinguishing is performed by blowing SF ₆ gas 28 compressed by the piston 22 and the cylinder 25 integrated with the movable contact 24 to the arc 31.

In the configuration according to the third embodiment, an annular base portion that is directly connected to an electric motor (not shown) composed of a pulse motor driven by pulse input and is disposed around a rotational drive shaft 21 that is rotationally driven by the electric motor. A contact portion 24 a of the movable contact 24 having 24 b is provided in pressure contact with an inner peripheral surface of a cylindrical cylinder 25 having an elliptical cross section constituted by an insulator jacket 26.
The contact portion 24 a of the movable contact 24 is brought into contact with the inner peripheral surface of the cylindrical cylinder 25 via the inner peripheral surface of the annular base 24 b of the movable contact 24 that is pressed against the outer peripheral surface of the rotary drive shaft 21 by the rotational drive of the rotary drive shaft 21. It moves so as to draw an orbit along the planetary motion along the planetary motion, and the contact portion 24a of the movable contact 24 and the contact portion of the fixed contact 29 are brought into and out of contact with each other.

  Here, the drive of the electric motor is started from the phase near the current zero point by performing phase control on the current phase waveform 32, and the electric motor pulse step 33 is instantaneously reached the maximum output, and the optimum arc is reached. Cut off current in time.

  If the timing at which the contact portion 24a of the movable contact 24 and the contact portion of the fixed contact 29 are separated by the rotational drive of the movable contact 24 by the rotational drive shaft 21 driven by the electric motor is a minute current period near the current zero point, A current without causing an arc due to a counter electromotive force generated by changing the insulation characteristic between the contact part 24a of the movable contact 24 and the contact part of the fixed contact 29 from the characteristic as a conductor to the characteristic as a resistor. Can be cut off.

According to the third embodiment of the present invention, a cylindrical insulating container composed of a cylinder 25 having an elliptical cross section composed of an insulator casing 26 filled with an arc extinguishing medium such as SF _6, and a cylinder composed of the cylinder 25. A cylindrical insulating container made of the cylinder 25 that is driven to rotate by a driving means made of a rotary drive shaft 21 provided on an axis parallel to the axis of the cylindrical insulating container made of the cylinder 25 inside the cylindrical insulating container. First contact means comprising a movable contact 24 provided with a contact portion 24a that moves in a rotational orbit by planetary motion that orbits the axis of the first contact means, and a contact portion 24a provided in the first contact means comprising the movable contact 24. A second contact hand comprising a fixed contact 29 provided with a contact portion disposed on the inner surface of the cylindrical insulating container comprising the cylinder 25 corresponding to the rotating track. The first contact means comprising the movable contact 24 is rotated by the first contact means comprising the movable contact 24 by the drive means comprising the rotational drive shaft 21 and the fixed contact 29 is provided. Since the opening and closing operation is performed by contacting and separating the contact portion of the second contact means, a predetermined contact and separation operation at the contact portion can be realized with a low output and a simple configuration by rotational drive with planetary motion, Furthermore, since the compression action of the piston 22 and the cylinder 25 can be increased and the SF ₆ gas can be applied to the arc at a higher speed, a power switchgear device having a better cutoff characteristic can be provided.

In the first to third embodiments according to the present invention, configurations described in the following items (1) to (6) are proposed.
(1) In the switching poles used in the power system, such as circuit breakers, disconnectors, grounding switches, etc., the movable contact 24 and the piston 22 are rotationally driven, and the fixed contact 29 and the insulator are connected to the rotational track of the movable contact 24. A rotary switchgear device having a function of opening concentrically and separating from the fixed contact 29 by rotational driving of the movable contact 24.

(2) In the rotary switchgear apparatus according to the item (1), the drive system for separating the contacts 24 and 29 is directly driven by using an electric motor, and the conventional complicated link function is used. A rotary switchgear with a simple and efficient operation function that eliminates the need for direct drive conversion.

(3) In the rotary switchgear apparatus according to the above (1), the drive system for separating the contacts 24 and 29 is precisely driven by using an electric motor to precisely control the open / close pole phase of the electrodes. Rotating switchgear device equipped with the function of turning on the electrode at the voltage phase timing to suppress the surge and cutting off the current at the optimum arc time.

(4) The rotary switchgear apparatus according to (1), wherein the rotary switchgear apparatus has a function capable of instantaneously moving to a distance between electrodes capable of withstanding a recovery voltage generated between electrodes after current interruption.

(5) In the rotary switching device of the above item (1), the piston 22 is rotationally driven to compress and expand the arc extinguishing medium between the movable contact 24, the fixed contact 29, and the insulator. A rotary switchgear device having a function of rapidly cooling and extinguishing an arc by acting on the arc moving by rotation.

(6) In the rotary switching device of the above item (1), the timing of opening the movable contact 24 from the fixed contact 29 is set as a minute current period near the current zero point, and the insulation between the contacts 24 and 29 is performed. A rotary switchgear device having a function of interrupting current without generating an arc due to a counter electromotive force generated by changing an object from conductive to resistive.

In the power switchgear device according to the present invention, the piston 22 that performs rotational driving, the movable contact 24 that operates integrally with the piston 22, and the stationary part that is intermittently disposed with the insulating portion around the movable contact 24. When the current is interrupted by the contact 29, the rotational operation force generated by the electric motor is directly transmitted to the piston 22, and the fixed contact 29 arranged around the movable contact 24 is driven by rotation. And a means for performing current extinguishing by blowing SF ₆ gas compressed by the piston 22 integrated with the movable contact 24 onto the arc generated between the pair of contacts 24 and 29. A rotary switchgear apparatus is provided.

According to the first to third embodiments of the present invention, the movable contact 24 is rotationally driven by the electric motor, thereby being separated from the fixed contact 29 arranged around the movable contact 24, and the pair of contacts 24. , 29 is provided with means for spraying SF ₆ gas compressed by the piston 22 integrated with the movable contact 24 to the arc generated between the electric motors 29, directly without converting the rotational operation force of the electric motor into linear drive conversion. Since the piston and the movable contact integrated therewith can be rotationally driven, the loss of driving force is small, and the pair of contacts can be separated by a simple mechanism with low operating force. In addition, since SF ₆ gas compressed by the piston can be instantaneously applied to the arc, contact consumption due to the arc can be reduced. In addition, since the pair of contacts are directly opened by the electric motor, the precise operation start time can be controlled, so that the current can be interrupted by the optimum arc time.

It is sectional drawing which shows the structure in the closed state in Embodiment 1 by this invention. It is the wave form diagram and sectional drawing for demonstrating the interruption | blocking process in Embodiment 1 by this invention. It is sectional drawing for demonstrating the closed circuit state and open circuit or grounding state in Embodiment 2 by this invention. It is sectional drawing which shows the structure in Embodiment 3 by this invention. It is the wave form diagram and sectional drawing for demonstrating the interruption | blocking process in Embodiment 3 by this invention.

Explanation of symbols

21 Rotating drive shaft, 22 Piston, 23 Pressing spring, 24 Movable contact, 25 Cylinder, 26 Insulator jacket, 27 Sliding coating, 28 SF ₆ gas, 29 Fixed contact, 30 Connecting conductor, 31 Arc, 32 Current Phase waveform, 33 Electric motor pulse step.

Claims (9)

  A container filled with an arc extinguishing medium, a first contact means provided with a contact part that is driven to rotate by a drive means inside the container and moves on a predetermined rotation path, and a contact part provided on the first contact means A second contact means provided with a contact portion disposed corresponding to the rotation trajectory of the first contact means and the contact portion of the first contact means by the rotational drive of the first contact means by the drive means A power switchgear characterized in that it opens and closes the contact part of the second contact means.   A cylindrical insulating container filled with an arc-extinguishing medium, the cylindrical insulating container being rotated and driven by a driving means comprising a rotating shaft provided on the same axis as the axis of the cylindrical insulating container inside the cylindrical insulating container A first contact means provided with a contact portion that moves on a rotating track centering on the axis of the insulating container, the cylindrical insulating property corresponding to the rotating track of the contact portion provided on the first contact means. A second contact means provided with a contact portion disposed on the inner surface of the container, and the first contact means and the second contact means are rotated by the driving means by the drive means; A power switchgear characterized in that an opening / closing operation is performed by contacting and separating the contact part of the contact means.   A cylindrical insulating container filled with an arc-extinguishing medium, the cylindrical insulating container being rotated and driven by a driving means comprising a rotating shaft provided on the same axis as the axis of the cylindrical insulating container inside the cylindrical insulating container A first contact means provided with a contact portion that moves on a rotating track centering on the axis of the insulating container, the cylindrical insulating property corresponding to the rotating track of the contact portion provided on the first contact means. A second contact means provided with a contact portion disposed on the inner surface of the container; and the first contact means corresponding to the rotation path of the contact portion of the first contact means on the inner surface of the cylindrical insulating container. The contact portion of the first contact means and the second contact means are provided by a rotational drive of the first contact means by the drive means. While opening and closing the contact part of the Serial first power switching device being characterized in that so as to smoothly perform the contact and separation operations of the contact portion of the contact portion and the second contact means by said sliding for coating contact means.   A container filled with an arc-extinguishing medium; a first contact means provided with a contact portion that is rotationally driven by a drive means inside the container and moves on a rotating orbit by planetary motion; and a contact provided on the first contact means Second contact means provided with a contact portion disposed corresponding to the rotation trajectory of the first contact means, and the contact portion of the first contact means by rotation driving of the first contact means by the drive means An electric power switchgear characterized in that an open / close operation is performed by bringing the contact part of the second contact means into contact with or away from.   A cylindrical insulating container filled with an arc-extinguishing medium, and the cylinder is rotationally driven by a driving means comprising a rotating shaft provided on an axis parallel to the axis of the cylindrical insulating container inside the cylindrical insulating container. Corresponding to the rotation orbit of the contact portion provided in the first contact means, the first contact means provided with a contact portion for moving the rotation orbit by planetary movement around the axis of the cylindrical insulating container A second contact means provided with a contact portion disposed on the inner surface of the insulative insulating container, and the contact portion of the first contact means and the contact portion by the rotational drive of the first contact means by the drive means A power switchgear characterized in that an opening / closing operation is performed by contacting and separating the contact part of the second contact means.   6. The electric power according to claim 2, further comprising an electric motor that includes a driving shaft including a rotary shaft that rotationally drives the first contact unit, and that is directly connected to the rotary shaft. Opening and closing device.   7. The electric power switch according to claim 6, wherein the electric motor directly connected to a rotating shaft that rotationally drives the first contact means is phase-controlled.   The timing at which the contact portion of the first contact means and the contact portion of the second contact means are separated by the rotational driving of the first contact means is a minute current period near the current zero point. The power switchgear according to claim 7. 2. An arc extinguishing medium flow means for causing an arc extinguishing action by flowing an arc extinguishing medium that is rotationally driven in accordance with the rotational driving of the first contact means and filled in the container is provided. A power switchgear according to any one of claims 1 to 8.

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