TWI416567B - Switchgear - Google Patents

Abstract

The invention relates to a switching device. The invention aims to provide a switching device with a simplified structure, which can prevent a ground switch from being turned on when a circuit is open or prevent a breaker from being turned on when the ground switch is turned on. The switching device (1) in the invention comprises a vacuum double-breakpoint three-position type switch (2) and a ground switch (5) making the load on a main circuit grounded from a side. The ground switch (5) comprises an operation part covered by a sliding door (10). The switching device (1) further comprises a linkage rod (11) for preventing the door (10) from freely sliding. The linkage rod (11) is released when the vacuum double-breakpoint three-position type switch (2) is turned off. Then the door (10) can freely slide and the operation part can perform operation.

Description

Switching device

The present invention relates to a switching device capable of breaking and grounding current.

The switch device is a device for receiving current from the busbar side and supplying it to the load side, and is equipped with a breaker, a circuit breaker, and a grounding switch to input, interrupt, and open current, or during maintenance. Ground the current.

However, when the main circuit is not disconnected, that is, when the current of the main circuit is in the input state or the current itself is blocked, when the voltage is generated on the load side, when the grounding switch is turned on, A grounding accident that causes grounding on the busbar side. In addition, when the circuit breaker is put into operation when the grounding switch is put into operation, a grounding accident may still occur. Therefore, in the case where the switching device is not disconnected, it is necessary to prevent the input operation of the grounding switch, or to prevent the input operation of the circuit breaker when the grounding switch is in the input state.

In the case where the switching device described above is not disconnected, the input operation of the grounding switch is prevented, and the conventional technique for preventing the input operation of the circuit breaker when the grounding switch is in the input state is described, for example, in the patent literature. 1 person. In Patent Document 1, it is described that the lock plate protrudes forward from the surface of the mounting plate in a state where the grounding breaker is in the input state, and the handle and the door that cannot be oscillated in the clockwise direction according to the lock plate are used. The installation of the handle for the circuit breaker can not be achieved, and the input of the circuit breaker can be prevented. Further, when the circuit breaker is put into operation, the lock plate protrudes from the surface of the mounting plate toward the front, and the use of the lock plate can not be used. The door that is swung in the clockwise direction cannot be connected to the handle for the grounding circuit breaker, and the metal lock type switch device that can prevent the input of the grounding circuit breaker can be prevented (paragraphs [0060] to [0062] of Patent Document 1).

(previous technical literature)

(Patent Literature)

[Patent Document 1] Japanese Patent Laid-Open No. Hei 9-154208

However, in the switch device disclosed in Patent Document 1, the connection mechanism is complicated, and when the conservativeness and the cost surface are considered, it is more desirable to realize the configuration by simplification.

Therefore, in the present invention, it is possible to provide a simplification of the configuration, and it is possible to prevent the input operation of the grounding switch without opening the circuit, or to prevent the input operation of the circuit breaker when the grounding switch is in the input state. The switching device is the first object.

In order to solve the above-described first problem, the switch device according to the present invention is a switch device including a switch having at least a circuit breaking function and a ground switch that grounds a load side of the main circuit, and the grounding switch is provided. The operation unit is provided with a sliding cover portion, and the switch device further includes a slide preventing portion for preventing the cover portion from sliding, and the slide preventing portion is released when the shutter is at the disconnection position. The cover portion is slidable to make the operation portion operable.

According to the switch device which achieves the first object of the present invention, the simplification of the configuration makes it possible to prevent the input operation of the grounding switch without opening the circuit, and to prevent the input operation of the circuit breaker when the grounding switch is in the input state. .

(to implement the form of the invention)

Hereinafter, embodiments of the invention will be described.

[Example 1]

The first embodiment will be described with reference to Figs. As shown in Fig. 1, the switch device 1 according to the present invention is configured to be capable of switching the three positions of the input, the occlusion, and the open circuit in a vacuum insulated state, and the two electrodes are arranged in parallel to form a main circuit including two points. The vacuum is cut at 2 o'clock from the 3-position type shutter 2; the vacuum is cut off from the load side of the 3-position type switch 2, and the load side of the main circuit is grounded to the grounding switch 5; the electric power is supplied to the vacuum 2 points. The bus bar 3 of the three-position type opener 2 is cut away, and the cable 4 that supplies electric power to the load side by the two-point vacuum type opener 2 is cut away from the vacuum.

Vacuum 2 point cutting off 3 position type switch 2 series is equipped to switch inputs Interrupting operator 6 for blocking position, and for switching occlusions Open circuit operator 7 at the open position. As shown in Fig. 2, the disconnecting manipulator 7 is provided with an interlocking shank 11 which is rotatably fixed to the shank rotating shaft 21 at the center of the shank, and the shank rotating shaft 21 is like the second and third. The figure is supported by a shank support 22 that is fixed to the body of the circuit breaker 7. One end of the interlocking lever 11 is connected to an upper rod 23 that protrudes upward from the breaking operator 7, and the upper rod 23 enters the inside of the breaking operator 7 as shown in Fig. 4 when the main circuit is at the disconnection position. On the side, when the main circuit is at the non-breaking position, as shown in Fig. 5, the main circuit can be moved up and down so that the disconnecting manipulator 7 can be positioned upward. The interlocking lever 11 is rotatably fixed to the shank rotating shaft 21 at the center of the shank as described above, and has one end connected to the upper rod 23, so that the upper rod 23 is interrupted according to the input of the main circuit. The position of the disconnection is changed in the up-and-down direction. When the main circuit is at the non-breaking position, the direction is approximately horizontal as shown in Fig. 5. When the main circuit is at the disconnection position, as shown in Fig. 4, upward. The respective rotations are centered on the handle rotation 21 . Further, a voltage detector 16 is provided on the load side of the three-position type opener 2 at a vacuum of two points, and the voltage detector 16 can detect the voltage on the load side of the main circuit.

The grounding switch 5 is also provided as shown in Fig. 1 for switching inputs. The grounding manipulator 24 in the blocking state is operated by the operating portion 25 provided at the front portion of the grounding manipulator 24 as shown in Fig. 3. Further, the threshold 10 is covered by the front door so that the grounding accident does not occur due to the erroneous operation of the operation unit 25. The rails are laid in the sill 10 so as to be slidable, and when the grounding manipulator 24 is operated, the sill 10 must be opened to operate the operating portion 25. The operation unit 25 is an insertion hole of the handle, and the handle is inserted into the insertion hole in a state where the sill 10 is opened, and the grounding manipulator 24 is operated. For the sill 10, the return spring 13 fixed to the disc is provided in the sill 10 even in the manner that the sill 10 is not continuously opened, and the elastic force acting in the closing direction is opened when the sill 10 is slid open. On the threshold 10. As shown in FIG. 2, the sill 10 of the present embodiment is a protruding portion 26 that protrudes from the front end of the switch device 1, and when the sill 10 is slid, the main circuit is placed at the ‧ blocking position. The interlocking shank 11 is in contact with the protruding portion 26, and hinders the sliding of the sill 10. Further, as shown in Fig. 6, the pressing portion 14 of the convex portion in the inner direction is provided in the sill 10, and the inside of the switch device 1 is provided with the pressing portion 14 when the sliding door 10 is slid, and the vacuum cannot be operated by 2 points. The command input from the three-position type shutter 2 is cut off and the operation stop mechanism 15 is interrupted. Further, a through hole 17 is provided in the sill 10 so that the solenoid type lock switch 18 provided inside the switch device 1 and operating according to the detection result of the voltage detector 16 can pass through the through hole 17. Further, the grounding manipulator 24 causes the interlocking pin 12 to protrude away from the interlocking shank 11 side of the three-position type opener 2 toward the above-described vacuum point 2, as shown in Fig. 4 when the grounding operator 5 is engaged The lock pin 12 is moved toward the lower left side, and as shown in Fig. 5, the interlock pin 12 is moved to the upper right side in the detached state. Furthermore, the interlocking pin 12 is limited to the case where the interlocking shank 11 is located above, and can also move downward to the left. On the other hand, the interlocking shank 11 is limited to the fact that the interlocking pin 12 is located on the upper right side, and can also move in the horizontal direction itself. In other words, the interlocking shank 11 and the interlocking pin 12 are provided with an interlocking function of interaction. As shown in Fig. 7, the operation lever 27 that is driven in accordance with the operation of the grounding manipulator 24 is provided with the indicator mold 20, and the grounding switch 5 is placed at the input position, and the three-position type is cut by a vacuum of two points. The shutter 2 is operated in such a manner that the actuator ‧ the occlusion prevention switch 19 is operated without being placed or interrupted, and the movement of the main circuit switch toward the input or the blocking position is prevented.

The operation according to each of the above operators will be described. The occlusion operator 6 is intended to be put Occlusion The operating force in the breaking operation is supplied to the operator of the 3-position type opener 2 at a vacuum of 2 o'clock, and has an operating force for cutting off the electrode once from the input position to the disconnection position. However, when it is not stopped at the blocking position and moved from the input position to the disconnection position, there is a possibility that the current is turned off without interrupting the current. Therefore, the stopper 9 provided in the fixing member of the breaking operator 7 stops the distance between the electrodes at the blocking position, and is surely interrupted, so that the stopper 9 provided in the fixing member of the breaking operator 7 is not opened from the input position to the breaking position. Current. From occlusion When the operation of the disconnection position is performed, when the stopper 9 is rotated and released, the operation of the interruption operator 6 is moved toward the disconnection position. At this time, the interlocking lever 11 rotates upward in conjunction with the movement of the stopper 9. The rotation operation of the stopper 9 is also described in Fig. 8.

On the one hand, the road is broken The operation of the blocking position is performed by the operating force of the breaking operator 7. Specifically, since the shutoff operator 6 operates the operating force in the direction of the disconnection, the breaking operator 7 is added with an operating force that blocks the operating force of the operator 6, and the stopper 9 is driven to move toward the blocking position. . At this time, the interlocking lever 11 moves in the approximately horizontal direction in conjunction with the movement of the stopper 9.

Interrupted The input operation is performed by the operating force of the interrupting operator 6.

And the input of the grounding switch 5 The switching of the open state is performed by the operating force of the grounding manipulator 24.

In the switch device 1 of the present embodiment, when the main circuit is not disconnected, the grounding switch is not introduced and the grounding accident on the bus side is caused. However, the specific means will be described below. Further, as shown below, a plurality of mechanisms are provided to prevent the grounding accident from occurring, and this is because the occurrence of an accident causing the busbar side to be grounded in the switching device is extremely large, and it is not possible to cause it to occur.

First, the sliding prevention mechanism according to the threshold 10 of the interlocking shank 11 will be described using Figs. 4 and 5. As described above, the sill 10 must be opened when the grounding switch 5 is operated, and the operator 25 provided at the front portion of the grounding switch 5 is operated, but the 3-position type opener 2 is placed at the vacuum at 2 o'clock. In the case of the position, as shown in Fig. 5, by sliding the interlocking shank 11 toward the approximately horizontal direction and blocking the sliding path of a portion of the projection 26 of the sill 10, the sliding of the sill 10 can be prevented. At this time, the interlocking lever 11 operates as a slide preventing portion for the rocker 10. When the sill 10 is to be opened when the interlocking shank 11 is oriented in the approximately horizontal direction, since the protruding portion 26 collides with the interlocking shank 11 to hinder the sliding, the formation cannot be opened.

On the other hand, as shown in Fig. 4, when the three-position type opener 2 is located at the disconnection position at the two-point vacuum, the interlocking shank 11 is oriented upward, and the interlocking shank 11 is made for the sliding operation of the sill 10 The state that was released. In this case, the interlocking shank 11 does not block the route in which the sill 10 slides.

By satisfying the above relationship, in the switch device 1 of the present embodiment, when the vacuum two-point-cutting 3-position type shutter 2 is located at the disconnection position, the operation unit 25 can be operated to perform grounding. The input of the shutter 5 is input. This mechanism is referred to as a mechanical interlock within this specification.

Next, a description will be given of a slide preventing mechanism according to the threshold 10 of the solenoid type lock switch 18. As in the above-described interlocking lever 11, the sill 10 must be opened when the grounding switch 5 is operated, and the operation portion provided at the front portion of the grounding switch 5 is operated, but the voltage detector 16 detects a positive or negative non-zero. In the case of the voltage, the solenoid type lock switch 18 is operated to pass through the through hole 17 provided in the rocker 10 to prevent the sliding of the rocker 10. Here, the case where the voltage detector 16 detects a positive or negative voltage other than 0 means that the main circuit is in a charged state, that is, corresponds to a non-off state. Therefore, in the switch device 1 of the present embodiment, the door sill 10 can be opened and the operation portion can be operated to perform the input of the grounding switch 5 when the vacuum two-point-cutting 3-position type shutter 2 is in the open state. . This mechanism is referred to as an electrical interlock within this specification.

The above-mentioned mechanical interlocking and electrical interlocking are motivated by different independent institutions. In other words, the mechanical interlocking system is limited to allow the opening of the threshold 10 in the case where the vacuum 2-point cut-off 3-position type shutter 2 is located at the disconnection position, and as a result, the grounding switch 5 can be made to be operative. The sexual interlock uses the voltage detector 16 to electrically detect whether the main circuit is in a charging state, and is limited to the state in which the main circuit is in a non-charging state, that is, in the case of the disconnected state, allowing the opening of the threshold 10, and the result is that the grounding can be opened and closed. 5 actor. In this way, by providing a plurality of interlocking mechanisms independent of each other, even if one of them is malfunctioning, a state in which the other is operated can be formed, and a fail-safe function capable of reliably preventing a ground fault can be realized.

The above mechanism can prevent the grounding switch 5 from being operated by preventing the opening of the threshold 10 and ensuring that the main circuit is in the disconnected position and in the open state, but in the switching device 1 of the present embodiment, even In the case where the threshold 10 is opened according to any matter, in order to prevent a grounding accident, a third interlocking mechanism according to the interlocking shank 11 and the interlocking pin 12 is further provided. The following is stated for this institution.

As described above, the interlocking lever 11 is oriented in the horizontal direction when the main circuit is at the non-breaking position. On the other hand, the interlocking pin 12 is moved to the lower left side simultaneously with the input of the grounding switch 5. Further, the interlocking pin 12 is limited to a state in which the interlocking lever 11 is oriented in the horizontal direction, and is movable toward the lower left side. As a result, the movement of the interlocking pin 12 can be limited to the case where the three-position type opener 2 is disconnected when the vacuum is cut at two points, that is, the input operation of the grounding switch 5 can be limited to 2 points of vacuum separation. The position type shutter 2 is located at the disconnection position. Thereby, a new fail-safe function attached to the above-described fail-safe thinking is made effective.

Up to now, the mechanism in which the grounding switch 5 cannot be put in the case where the main circuit is not disconnected, thereby preventing the grounding accident, will be described. However, in the case of the grounding accident, when the grounding switch 5 is already in the input state, the vacuum 2 point is cut away from the three-position type switch 2 from the disconnection to the interruption and the input is also caused. Therefore, in the case of preventing grounding accidents, it is also necessary to prevent the form of the grounding accident. The following is stated for this institution.

First, the input and the occlusion prevention mechanism of the three-position type opener 2 at the time of the vacuum of the grounding switch 5 according to the threshold 10 are described. In the switch device 1 of the present embodiment, when the grounding switch 5 is turned on, the threshold 10 in Fig. 6 is in an open state. In addition, the sill 10 is provided with the pressing portion 14, and when the sill 10 is in an open state, the erection preventing mechanism 15 is pressed by the pressing portion 14. When the pressing unit 14 is pressed by the pressing unit 14, the input/interrupting operation preventing mechanism 15 outputs a command that the operation of the interrupting operator 6 and the breaking operator 7 cannot be performed, whereby the vacuum can be operated at two points to cut off the three-position type opener. 2. Therefore, when the grounding switch 5 is turned on, that is, when the threshold 10 is opened, the vacuum can be operated at two o'clock, and the three-position type opener 2 can be removed. Therefore, the movement to the input and the blocking position cannot be performed, and the grounding accident can be prevented. .

Next, the interlocking mechanism according to the interlocking pin 12 will be described. First, as shown in Fig. 4, the interlock pin 12 is oriented to the lower left in the input state of the grounding switch 5. In addition, when the three-position type opener 2 is moved from the disconnection position to the input/occlusion position at the two-point vacuum, as shown in Fig. 5, the interlocking shank 11 must be oriented in the horizontal direction, but the interlocking shank 11 is attached. It is limited to the case where the interlocking pin 12 is located on the upper right side, and it is possible to move in the horizontal direction. However, since the interlocking pin 12 is directed to the lower left when the grounding switch 5 is inserted, the interlocking shank 11 cannot be moved to the horizontal direction. As a result, when the grounding switch 5 is inserted, the two-point vacuum cut-off device 2 is prevented from moving from the disconnection position to the input/breaking position.

In addition, the input/break prevention mechanism of the three-position type switch 2 is cut in accordance with the two-point vacuum of the input/occlusion prevention switch 19 provided in the operation lever 27 connected to the grounding manipulator 24. As shown in FIG. 7, the operation lever 27 that is driven by the operation of the grounding manipulator 24 is provided with the indicator mold 20, and the input/interrupt prevention switch 19 is provided at a position fixed to the operation lever 27. When the grounding switch 5 is inserted, the operating lever 27 is lowered downward to form a pressing input/interruption prevention switch 19. When the input/interruption prevention switch 19 is pressed, a command to fix the disconnection position is transmitted from the switch to the three-position type opener 2 from the vacuum at 2 o'clock, whereby the input and the occlusion operation cannot be performed.

According to the above-described respective mechanisms, when the three-position type shutter 2 is cut at a vacuum of 2 o'clock, the input of the grounding switch 5 can be prevented, thereby preventing the occurrence of a grounding accident. According to the above-described switching device of the present embodiment, the configuration in which the number of parts is small and simplified can prevent the input operation of the grounding switch without the disconnection, and in the case where the grounding switch is in the input state. Prevent the input action of the circuit breaker. Further, since the voltage detector 16 is provided, the electrical interlocking action of the solenoid type lock switch 18 is performed according to the voltage thereof. Therefore, even when the voltage is present on the load side, the ground can be grounded even when the main circuit is at the disconnection position. The input of the shutter 5 is prevented.

In the present embodiment, by preventing the sliding of the sill 10 itself covering the grounding operator 24, it is possible to prevent a grounding accident without an increase in the number of special parts for interlocking. Further, in the case of the interlocking mechanism, the effect of the interlocking mechanism can be achieved by providing a sliding cover portion covering the new grounding manipulator 24 in addition to the threshold of the grounding operator 24. In this case, the number of parts is increased as compared with the case where the door sill 10 has an interlocking function, but the mechanism is the same as that of the sill 10, and at most the minimum number of parts is increased, which can be prevented from becoming complicated. Composition.

In the present embodiment, the interlocking shank 11 is described as a rotary type, but it is not necessarily a rotary type. If it is limited to the position of the disconnection, the sliding of the threshold can be achieved, and the position of the occlusion position can be achieved. It can prevent the sliding of the threshold. In a more specific example, for the sliding threshold, the sliding prevention means is located at a position that hinders the route thereof when the ‧ blocking position is input, and the sliding prevention means is not positioned when the sliding position is located It will hinder the location of the threshold route.

In the present embodiment, it is advantageous from the viewpoint of miniaturizing the switching device in order to reduce the distance between the electrodes when the shutter is a two-point cutter. However, each of the above interlocking mechanisms can be applied regardless of whether it is a two-point cut-off.

In the present embodiment, the elastic force acting in the direction of covering the operation portion is generated in the rocker 10 by using the return spring 13. Thereby, it is possible to prevent the threshold 10 from being maintained in an open state. However, the elastic body that can achieve this effect is of course not limited to the return spring.

In the present embodiment, the solenoid type lock switch 18 is prevented from sliding through the threshold 10 according to the voltage detected by the voltage detector 16, and is electrically interlocked. However, it is determined whether or not voltage is applied to the load side. In this case, if the voltage is applied by the means, the input of the grounding switch 5 cannot be performed based on the command from the switch. The content disclosed in this embodiment is of course only an embodiment.

In the present embodiment, the interlocking shank 11 and the interlocking pin 12 mutually interfere with each other's movement. Therefore, the interlocking mechanism for restricting the operation of the movable electrode of the other side can be used as an interlocking function for performing the operation of the grounding switch 5 or the vacuum two-point cutting of the three-position type switch 2, so that the number of parts can be plotted. Reduction. However, even if it is further provided, it operates in accordance with the operation of the shutter (including at least the breaking function. The following is the same), and the interlocking pin 12 of the grounding switch 5 cannot move to the position at the time of the input when the shutter is not disconnected. And the means for operating in accordance with the operation of the grounding switch, and the interlocking lever 11 can not move toward the position at the time of the insertion and the occlusion when the grounding switch is at the input position, and the interlocking mechanism can be realized. . Further, the interlocking shank 11 is not limited to the interlocking shank, but operates in accordance with the operation of the three-position type vacuum switch 2 at a two-point vacuum, and the three-position type opener 2 is cut off at a vacuum of two points. In the case of preventing the disconnection of the interlocking pin 12 when the grounding switch 5 is engaged The component of the action at the time of input can be used. Also for the interlocking pin 12 is also the input of the grounding switch 5 When switching the disconnection, it operates in conjunction with the switching operation of the grounding switch 5, and when the grounding switch 5 is at the input position, the vacuum is prevented from being separated from the disconnection position of the three-position type opener 2 to a position other than the disconnection. The moving member of the interlocking handle 11 in the movement may be a member.

In the present embodiment, the sill 10 is provided with the pressing portion 14, and the slamming operation preventing mechanism 15 is pressed by the pressing portion 14 in a state where the sill 10 is opened, so that the vacuum is cut off from the three-position type shutter 2 at two points. The case of inoperability is taken as an example. However, the present invention is not limited to this example, and the above-described display is not limited to the sill, and the slidable cover portion is slid and placed in a state in which the grounding switch 5 can be operated, and the transfer is not possible. The means of inputting the grounding switch can also be used.

[Embodiment 2]

In the first embodiment described above, the three-position type open-closer 2 having the two-point vacuum cut-off function is provided as an example. However, the breaker and the circuit breaker may be separately provided. In this case, the interlocks described in the first embodiment may be formed between the circuit breaker and the grounding switch 5. The illustration of the present embodiment is also omitted.

Specifically, first, it is possible to prevent the grounding switch 5 from being input when the circuit breaker is not disconnected. In other words, when the circuit breaker is moved from the open circuit to the input position, the interlocking handle of the circuit breaker is moved to an approximately horizontal direction to prevent the opening of the threshold 10 for operating the grounding operator 24. Further, a voltage detector is disposed on the load side of the circuit breaker, and when a positive or negative voltage is detected by the voltage detector, it is determined to be in a non-off state, and a solenoid type lock switch is provided in order to prevent an input operation of the grounding operator 24. The through hole 17 is provided through the through hole 17 of the sill 10 to prevent the opening of the sill 10 for operating the operation portion of the grounding operator 24. Further, even in the case where the circuit breaker is not in the open position and the door sill 10 is opened according to anything, in this case, since the interlocking shank is located in the approximately horizontal direction, the interlocking pin can be prevented from being directed to the lower left side. Move to prevent the input of the grounding switch 5.

Next, when the grounding switch 5 is input, it is possible to prevent the input of the circuit breaker. In other words, the sill 10 is provided with the pressing portion 14, and when the sill 10 is opened, the pressing portion 14 provided in the sill 10 is pressed and pressed, and the occlusion operation stopping mechanism 15 is pressed, and the vacuum can be operated at two o'clock to cut away from the three-position type opener 2 . Therefore, when the grounding switch 5 is turned on, that is, when the threshold 10 is opened, the three-position type opener 2 is inoperable at two points of the vacuum, and the movement to the input and the blocking position cannot be performed, so that it can be prevented. Grounding accident. Further, since the interlock pin is directed to the lower left side when the grounding switch 5 is engaged, the interlocking lever cannot be moved in the approximately horizontal direction. Therefore, at the time of the input of the grounding switch 5, it is possible to prevent the vacuum from being cut away from the disconnection position of the three-position type opener 2 from the disconnection position to the insertion/disconnection position. Further, in the same manner as in the first embodiment, the operation bar provided in the grounding switch 5 is provided with the ‧ blocking prevention switch 19, and when the grounding switch 5 is at the input position, the ‧ blocking prevention switch 19 is operated . As a result, when the grounding switch 5 is at the input position, it is not possible to perform the two-point vacuum cutting of the three-position type switch 2 and the interruption.

As described above, the interlocking mechanisms explained in the first embodiment can be applied even in the case of separating the breaker and the circuit breaker. Also in the switching device of the present embodiment, as in the first embodiment, the configuration in which the number of parts is small and simplified can prevent the input operation of the grounding switch from being prevented in the case of non-breaking, and the grounding switch is placed in the input. In the case of the state, the input action of the circuit breaker is prevented. Further, since the voltage detector is provided, the interlocking action of the solenoid type lock switch 18 is applied according to the voltage, and the grounding switch 5 can be prevented from being input when the voltage remains on the load side.

1. . . Switching device

2. . . Vacuum 2-point cutting off 3-position type switch

3. . . bus bar

4. . . Cable

5. . . Grounding switch

6. . . Interrupting operator

7. . . Open circuit operator

9‧‧‧block

10‧‧‧ threshold

11‧‧‧Interlocking handle

12‧‧‧Interlocking pin

13‧‧‧Return spring

14‧‧‧ Pressing Department

15‧‧‧Investment ‧ Interrupting operation stop mechanism

16‧‧‧Voltage detector

17‧‧‧through holes

18‧‧‧Spiral type lock switch

19‧‧‧Investment ‧ Interruption prevention switch

20‧‧‧Indicating mould

21‧‧‧ handle rotation axis

22‧‧‧ handle support

23‧‧‧Upper rod

24‧‧‧ Grounding Operator

25‧‧‧Operation Department

26‧‧‧Protruding

27‧‧‧Operator

Figure 1 is a side cross-sectional view of the switch device.

Figure 2 is a diagram for explaining the circuit breaker and the grounding operator.

Fig. 3 is a view for explaining the interlocking mechanism according to the threshold.

Figure 4 is a diagram showing the interlocking of the interrupting operator and the grounding operator, showing the situation of the situation of the disconnected position and the grounded position.

Figure 5 is a diagram showing the interlocking of the interrupting operator and the grounding operator, showing the situation of the non-breaking position and the non-grounding position.

Figure 6 is a plan view of the grounding operator and the circuit breaker to illustrate the electrical interlocking surface.

Figure 7 is a diagram showing the grounding mechanism.

Figure 8 is a diagram showing the stop mechanism of the circuit breaker.

7. . . Open circuit operator

10. . . Threshold

11. . . Interlocking handle

12. . . Interlocking pin

twenty one. . . Handle rotation axis

twenty two. . . Shank support

twenty three. . . Upper rod

twenty four. . . Grounding operator

26. . . Protruding

Claims (18)

A switch device comprising: a switch having at least a circuit breaker function; and a switch device for grounding a load on a load side of a main circuit, wherein the ground switch is covered by a sliding cover portion In the operation unit, the switch device further includes a slide preventing portion that prevents the cover portion from sliding, and the slide preventing portion is released when the shutter is at the disconnection position, and the cover portion is slidable, so that the operation portion becomes Operable. The switch device according to claim 1, wherein the slide preventing portion is provided in the shutter. The switch device according to claim 1 or 2, wherein, when the operation portion is operable, an elastic force covering the direction of the operation portion is applied to the cover portion. The switch device according to claim 1, wherein the switch has a disconnecting actuator, the grounding shutter includes a grounding operator, and the sliding preventing portion is provided in the disconnecting device, wherein the covering portion is covered In the sliding sill of the operation unit, the sliding prevention unit prevents the sliding of the sliding sill by pressing. The switch device according to the first aspect of the invention, wherein the switch is a switch having a position of three inputs, a break, and an open circuit, wherein the switch is provided for driving when moving from the blocking position to the breaking position. When the stopper is operated, the sliding prevention portion is in the blocking position of the shutter When the movement to the disconnection position is made, the operation is performed in conjunction with the operation of the above-described stopper. A switch device includes: a switch having at least a circuit breaker; a ground switch that grounds a load side of a main circuit; and a voltage detector that detects a voltage on a load side of the main circuit, the switch device having: When the voltage detector detects a positive or negative voltage, the voltage detector is connected to the voltage detector to prevent the input of the grounding switch. The switch device according to claim 6, wherein the grounding shutter has an operation portion covered by the covering portion, and the input preventing means is a means for preventing movement of the covering portion. The switch device according to claim 7, wherein the movement of the covering portion is a sliding type movement, and the input preventing means prevents the coating from being detected when the voltage detector detects a positive or negative voltage. The sliding of the department. A switch device comprising: a switch having at least an input and a disconnection position; a grounding switch that grounds a load side of the main circuit and has a ‧ cut-off position; and an input of the ground switch When switching off, the input from the aforementioned grounding switch a first member that operates in conjunction with the cutting operation; and operates in response to the movement of the shutter, and prevents the operation of the first member when the grounding switch is inserted, when the shutter is at the non-breaking position 2 components. The switch device according to claim 9, wherein the second member is inserted into the shutter and the occlusion is interrupted. When the circuit is switched, the input of the above-mentioned switch is ‧ interrupted The switching operation of the disconnection operates together, and the first member prevents the operation of the first means when the shutter is moved from a disconnection position to a position other than the disconnection when the grounding switch is at the input position. A switch device includes: a switch having at least a circuit breaker; a ground switch that grounds a load side of a main circuit; and a voltage detector that detects a voltage on a load side of the main circuit, the switch device having the following features: The grounding shutter includes an operation unit that is covered by a sliding cover portion, and the switch device further includes a slide preventing portion that prevents the cover portion from sliding, and a case where a positive or negative voltage is detected by the voltage detector. The prevention means for preventing the movement of the covering portion and preventing the input of the grounding switch, wherein the sliding preventing portion is released when the shutter is at the disconnection position, and the input preventing means is using the voltage detector When the positive or negative voltage is not detected, the operation is released, and the operation unit is made operable. A switch device comprising: a switch having at least an input and a disconnection position; and a grounding switch that grounds a load side of the main circuit and has a ‧ cut-off position, wherein the switch device is characterized by: the grounding The shutter includes: an operation portion covered by the sliding cover portion; a slide prevention portion for preventing the cover portion from sliding; and the input of the grounding switch When switching off, the input from the aforementioned grounding switch a first member that operates in conjunction with the cutting operation; and operates in response to the movement of the shutter, and prevents the second member of the operation of the first member when the grounding switch is inserted when the shutter is in a non-breaking position The slide preventing portion is released when the shutter is at the disconnection position, and the cover portion is slidable. A switch device comprising: a switch having at least an input and a disconnection position; a ground switch having a load side grounded to a main circuit and having a ‧ cut-off position; and a voltage detection for detecting a voltage on a load side of the main circuit The switch device further comprises: the input of the grounding switch When switching off, the input from the aforementioned grounding switch a first member that operates in conjunction with the cutting operation; and operates in response to the movement of the shutter, and prevents the second member of the operation of the first member when the grounding switch is inserted when the shutter is in a non-breaking position And connected to the voltage detector, and when the voltage detector detects a positive or negative voltage, the means for preventing the input of the grounding switch is prevented. A switch device comprising: a 2-point cut-away switch having at least a vacuum insulation for an input and a disconnection position; a ground switch having a load side of the main circuit and having a ‧ cut-off position; and detecting the main circuit The voltage detector of the voltage on the load side is characterized in that the switch device further includes: the grounding switch is an operation portion covered by a sliding type sill; an interlocking shank for preventing the sill from sliding; and the input of the grounding switch When switching off, the input from the aforementioned grounding switch An interlocking pin that operates in conjunction with the cutting action; and a solenoid type lock switch that prevents the input of the grounding switch from being connected to the voltage detector and detects the positive or negative voltage by the voltage detector, the interlocking The handle is operated in response to the movement of the shutter, and when the shutter is at the non-breaking position, the operation of the interlocking pin when the grounding switch is inserted is prevented, and when the shutter is at the disconnecting position It is released, and the aforementioned threshold is made slidable. A switch device includes: a switch having at least an input and a disconnection position; and a switch having a fixed electrode and a movable electrode; and a switch for opening and closing the grounded fixed electrode and the grounded movable electrode; A grounding switch that grounds a load side of a main circuit, wherein the switch device includes a first interlocking mechanism that limits an operation of the grounding movable electrode of the grounding switch, and the grounding switch has The second interlocking mechanism that restricts the operation of the movable electrode of the shutter, the first interlocking mechanism limits the operation of the grounding movable electrode of the grounding switch by preventing the operation of the second interlocking mechanism. The second interlocking mechanism restricts the operation of the movable electrode of the shutter by preventing the operation of the first interlocking mechanism. The switch device according to claim 1, wherein the switch device further includes: in a case where the operation portion is made to be operable by moving or sliding the cover portion in response to movement of the cover portion And means for transmitting an instruction that the grounding switch cannot be input. The switch device according to claim 16, wherein the means for transmitting the command further includes a transfer unit including a pressing portion of the covering portion and the command corresponding to the pressing portion. The switch device of claim 1, wherein the grounding switch is provided An operation lever that is driven away from the position, and the switch has a switch that is switchable to an input position or an off position of the grounding switch, and the opening relationship is transmitted when the grounding switch is at the input position. An instruction to fix the aforementioned shutter to the disconnection position.