KR100222380B1 - Gas switch - Google Patents

Abstract

Provided is a gas insulated switchgear having a separation device which does not require a gas treatment operation during the test and which has a simple structure and is excellent in operability.

It is rotatably supported by the enclosure 12 and the enclosure 12 electrically connected to the power receiving side cable head, and is supported by the rotating shaft 17 made of an insulating member and the enclosure 12 so as to move and move in the opposite direction. The first movable contactor 24 having the first and second contactors 22 and 23 so as to be intermittently connected to the side fixed contactor 20 and the bushing side fixed contactor 21 for a pressure resistance test slips on the enclosure 12. A second movable contactor 29 having a third contactor 28 which is supported to move forward and backward and is intermittently connected to the busbar-side stationary contactor 27 for power distribution, and connected to the rotary shaft 17 to rotate the rotary shaft 17. And the separating device 11 which becomes the 1st and 2nd drive levers 31 and 32 which rotate by each and drives the 1st and 2nd movable contactors 24 and 29 respectively.

Description

Gas Insulated Switchgear

1 is a cross-sectional view showing the configuration of a gas insulated switchgear according to [Example 1] of the present invention.

2 is a cross-sectional view showing the configuration of the separating device in FIG. 1 in which the three-phase collective insulating rod is in the first rotational position.

3 is a cross-sectional view showing the configuration of the separating device in FIG. 1 with the three-phase collective insulating rod in a second rotational position.

FIG. 4 is a cross-sectional view showing a state in which the three-phase collective insulating rod is in a third rotational position in the configuration of the separating device in FIG.

FIG. 5 is a circuit diagram showing a circuit configuration of a gas insulated switchgear when the separator in FIG. 1 is in the state shown in FIGS.

6 is a circuit diagram showing a schematic configuration of a conventional gas insulated switchgear.

FIG. 7 shows the disconnection mechanism of the fatigue machine in FIG.

* Explanation of symbols for main parts of the drawings

12: coalescing 16: branch conductor

17: Three-phase integrated insulating rod (rotary shaft) 18: First bearing

19: 2nd bearing 20: Lightning arrester side fixed contactor

21: bushing side fixed contactor for pressure resistance test 22: first contactor

23: second contact 24: first movable contact

25, 25b, 30b: curved portion 30: cam groove

25a, 30a: straight portion 27: busbar side fixed contact for power distribution

26: third bearing 29: second movable contact

28: third contactor 32: second drive lever

33, 34: engagement pin A: first rotational position

B: second rotation position C: third rotation position

The present invention is a gas having a separation device for connecting the bushing for pressure test to the power receiving side cable head and for separating the arrester, the circuit breaker, and the main bus side of the power distribution side from the power receiving side cable head at the factory breakdown voltage test and the local cable breakdown voltage test. It relates to an insulated switchgear.

FIG. 6 is a sectional view showing a schematic configuration of a conventional gas insulated switchgear, and FIG. 7 is a diagram showing a disconnecting mechanism of the arrester in FIG.

In the drawing, 1 denotes a first container filled with insulating gas, 2 denotes a busbar-side disconnector which is accommodated in the first container 1 and connected to the bus bar 3, and 4 denotes a first container 1. The second container 5, which is divided into the atmosphere and is filled with an insulating gas like the first container 1, is housed in one side of the second container 4, and one terminal 5a is connected to the bus bar side disconnector. The circuit breaker 6 connected with 3 is a cable-side disconnector housed in the other side of the 2nd container 4, and connected to the other terminal 5b of the circuit breaker 5, and is made through the cable head 7. It is connected to the connection cable 8 arrange | positioned outside the container 4 of 2.

9 is an arrester connected between the cable-side disconnector 6 and the cable head 7, and 10 is a bushing for internal pressure test attached to the ceiling of the second container 4. As shown in FIG.

In the gas insulated switchgear configured as described above, power is received through the connecting cable 8 and distributed to the bus bar 3 through the cable side disconnector 6, the breaker 5, and the model side disconnector 2. Doing.

In addition, the breakdown voltage test of the gas insulated switchgear must be conducted with a factory breakdown voltage test and a local breakdown voltage test with a cable breakdown voltage test and a commercial frequency breakdown voltage test.

In the commercial frequency withstand voltage test, the arrester 9 needs to be separated from the circuit due to the performance of the arrester 9, for example, by moving the arrester 9 upwards as indicated by the broken line in FIG. After disconnecting and connecting the withstand pressure test bushing 10 to the circuit, the gas was sealed and tested. After the test was completed, gas treatment was performed again, and the arrester 9 was moved in the direction to be connected in its original state. .

In the cable withstand voltage test, since the capacitance of the connection cable 8 is large, it is generally carried out by applying a DC voltage. In this case, the connection cable 8 is separated from the circuit by gas treatment. The DC voltage is applied to the connection cable 8 only.

In other words, the arrester 9 should be separated during the breakdown voltage test in the factory, and the arrester 9 and the circuit on the power distribution side should be separated during the breakdown voltage test.

Since the conventional gas insulated switchgear is configured as described above and needs to carry out the test as described above, it is necessary to separate the arrester 9 and the circuit, respectively, and to perform the gas treatment at that time. There was a problem of being troublesome.

It is also conceivable to install a separation device to simplify the work, but it must be installed in the arrester 9 and the cable head 7, respectively, there is a problem that the structure is complicated.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a gas insulated switchgear having a separation device having a simple structure and excellent operability. .

The gas insulated switchgear according to claim 1 of the present invention is a housing electrically connected to a power receiving side cable head, a rotating side formed of a supported insulating member, and a sliding side supported by a sliding motion of the housing, and opposite directions, respectively. To the first contactor or the enclosure having the first and second contactors that can be interrupted by the arrester-side fixed contactor and the bushing-side fixed contactor for internal pressure test by sliding forward and backward to be supported by the sliding movement. A first movable contactor having a third contactable contactable to the busbar side fixed contactor and a first movable contactor which is rotated by a rotation of a high axis connected to the rotating side at a predetermined angle to drive the first and second movable contactors respectively; And a separating device having a second driving lever.

In the gas insulated switchgear according to claim 2 of the present invention, in the first rotation position of the first contactor to the arrester-side fixed contactor at the first rotational position of the rotary shaft, the third contactor is to the busbar-side fixed contactor for power distribution. The second contactor contacts the bushing side fixed contactor for the internal pressure test at the second rotational position, and the third contactor contacts the busbar-side fixed contactor for the power distribution test, respectively, and again the second contactor at the third rotational position. It is configured to be in contact with the bushing side fixed contactor for internal pressure test.

Further, the gas insulated switchgear according to claim 3 of the present invention is operated in the first rotational position of the rotary shaft, and subjected to a commercial frequency withstand voltage test in the second rotational position, and again to the third rotational position. The local cable withstand voltage tests were conducted separately.

In the separator of the gas insulated switchgear according to claim 1 of the present invention, the first and second movable levers are slid and moved by the first and second drive levers rotated by rotation of the rotary shaft, respectively. And the second and third contacts are intermittent with the fixed contacts on the corresponding sides, respectively.

In addition, in the gas insulated switchgear according to claim 2 of the present invention, the second shaft is further rotated to the fixed contactor on the side corresponding to each of the first and third contacts by rotating the rotary shaft at the first rotational position. By rotating the first and third contacts to the fixed contactor on the corresponding side and the second rotational position respectively by rotating in the position, and again to the fixed contactors on the corresponding side By rotating to the rotation position, the second contactor is brought into contact with the stationary contactor on the corresponding side, respectively.

Further, the gas insulated switchgear according to claim 3 of the present invention operates when the rotary shaft of the separator is in the first rotational position, and performs a commercial frequency withstand voltage test when the separation shaft is in the second rotational position. It is possible to carry out on-site cable breakdown test when in the rotational position.

Example 1

Best Mode for Carrying Out the Invention Embodiments of this invention will be described below with reference to the drawings.

FIG. 1 is a cross-sectional view showing the configuration of the gas insulated switchgear according to the first embodiment of the present invention, and FIG. 2 is a configuration of the separation device in FIG. 1, with the three-phase collective insulating rod in the first rotational position. 3 is a cross-sectional view showing the configuration of the separation device in FIG. 1 while the three-phase collective insulating rod is in the second rotational position, and FIG. 4 is a configuration of the separation device in FIG. Fig. 5 is a cross-sectional view showing the three-phase collectively connected rod in the third rotational position, and Fig. 5 shows the circuit configuration of the gas insulated switchgear when the separator is shown in Figs. It is a circuit diagram to display, respectively.

In the drawings, the same parts as in the conventional apparatus shown in Fig. 6 are denoted by the same reference numerals, and description thereof is omitted.

11 is configured as shown in FIG. 2 in the separating apparatus, and only one phase is shown in the drawing, but three phases are provided in parallel.

12 is a branch attached to the tip of the cable head 7 via the tublip contact 15 as a housing suspended through the post spacer 14 to the three-phase common base 13 installed in the second container 4. It is electrically connected to the conductor 16.

17 is rotatably supported on the enclosure 12 by a three-phase integrated insulating rod formed of an insulating member.

18 and 19 are the first and second bearings 22, which are arranged horizontally opposite to the arrester side fixed contactor 20 and the bushing side fixed contactor 21 for the internal pressure test in a direction opposite to the enclosure 12; 23 is provided to slide in these first and second bearings 18 and 19, and the tip is moved forward and backward toward the lightning arrester side fixed contactor 20 and the bushing side fixed contactor 21 for internal pressure test, respectively. The first and second contacts, 24 are connected to respective rear ends of the first and second contacts, and are formed with a cam groove 25 formed of a straight portion 25a and a curved portion 25b as shown in the drawing. Is a movable contactor.

26 is a third bearing vertically installed opposite to the busbar side fixed contactor 27 installed on the cable side disconnector 6 side of the enclosure 21, and 28 slides inside the third bearing 26. The third contactor 29, which is installed to move and moves forward and backward toward the busbar side fixed contactor 27 for power distribution, is connected to the rear end of the third contactor 28, and the straight portion 30a as shown in the figure. ) And a second movable contactor having a cam groove 30 formed of a curved portion 30b.

31 and 32, respectively, one end is connected to the three-phase collective insulated rod 17 through a predetermined angle, and each of the other end side is fixed to each of the cam pins 25 and 30, the hanging pins 33 and 34 are fixed. With the first and second drive levers, when the three-phase collective insulated rod 17 is in the first rotational position (indicated by the dashed-dotted line A in the figure), the first drive lever 31 is engaged on the side of the first drive lever 31. The pin 33 to be hooked to the straight portion 25a of the cam groove 25 on the second driving lever 32 side is locked to the curved portion 30b of the cam groove 30, respectively. have.

Next, the operation of the gas insulated switchgear according to the first embodiment configured as described above will be described.

At first, in operation, the separation device 11 is in a state as shown in FIG. 2, that is, the three-phase collective insulating rod 17 is in the first rotational position, and the first contactor 22 is the fixed arrester side fixed contactor 20. ), And the third contactor 28 contacts the busbar side fixed contactor 27 for power distribution, respectively, and is received at the cable head 7 side as shown in FIG. 11), it is distributed to the bus bar 3 side through the cable side disconnector 6, the breaker 5, and the busbar side disconnector 2.

In the case of the commercial frequency withstand voltage test, the state in which the separator 11 is shown in FIG. 3, that is, the three-phase integrated insulating rod 17 is rotated clockwise again to form a second rotational position (one point in the drawing). Moving to the dashed line B), the pin 33 hanging through the first drive lever 31 also moves clockwise, i.e., in two directions from the top left.

At this time, since the hanging pin 33 is engaged with the straight portion 25a of the gap groove 25 of the first movable contact 24, the first movable contact 24 is also the same as the hanging pin 33 moves. The first contactor 22 moves away from the arrester side fixed contactor 20, and the second contactor 23 makes contact with the bushing side fixed contactor 21 for a pressure resistance test.

On the other hand, since the hanging pin 34 of the second drive lever 32 moves along the curved portion 30b of the gap groove 30 of the second movable contact 29, the second movable contact 29 Since no force acts on the second movable member 29 and the second movable contactor 29 does not move, the third contactor 28 and the busbar-side stationary contactor 27 for power distribution are maintained in contact with each other.

As shown in FIG. 5 (b), the factory head pressure test is performed by connecting the cable head 7 side, the bushing pressure test side 10 and the cable side disconnector 6 side to each other.

In the case of on-site cable withstand voltage test, the separator 11 is shown in FIG. 4, that is, the three-phase collective insulating rod 17 is rotated clockwise again from the second rotational position described above, and the third When moving to the rotational position (indicated by the dashed line C in the figure), the hanging pin 33 also moves clockwise, that is, from the top left to the right through the first driving lever 31, but at this time, the hanging pin Since 33 moves along the curved portion 25b of the cam groove 25, no force is applied to the first movable contactor 24, and the first movable contactor 24 does not move. The second contactor 23 maintains its contact with the bushing side fixed contactor 21 for the pressure resistance test, and the second contactor 23 is separated from the first contactor 22 and the lightning arrester side fixed contactor 20.

On the other hand, since the locking pin 34 of the second drive lever 32 is engaged with the straight portion 30a of the cam groove 30 of the second movable contact 29 at this time, the locking pin 34 In accordance with the movement, the third contactor 28 moves in both directions from above and below the ground, and the third contactor 28 is separated from the busbar side fixed contactor 27 for power distribution.

As shown in FIG. 5 (c), the cable head 7 side and the withstand pressure test bushing 10 side are connected through the separating device 11, and a local cable withstand voltage test is performed.

As described above, according to the first embodiment, the locking pins 33 and 34 fixed to the other end sides of the first and second driving levers 31 and 32 by the rotation of the three-phase integrated insulating rod 17, respectively. The first and second movable contacts 24 are formed by moving the locking pins 33 and 34 so that the locking pins 33 and 34 and the cam grooves 25 and 30 are engaged, respectively. (29) to move the first, second and third contacts to the corresponding arrester-side fixed contactors 20, bushing-side fixed contactors 21 for internal pressure test and busbar-side fixed contactors 27 for power distribution, respectively. As it is designed to be intermittent, it is possible to construct a separation device having a simple structure and excellent operability, so as to obtain a gas insulated switchgear capable of performing a process breakdown test and a local cable breakdown test without performing gas treatment work during testing. There is a number.

In addition, at about half a rotation of the three-phase integrated insulating rod 17, the connection configuration corresponding to the operation and the respective tests as shown in FIG. 5 is enabled, so that the separation device can be miniaturized.

As described above, according to claim 1 of the present invention, the housing electrically connected to the power receiving side k-head, the rotating shaft made of an insulating member rotatably supported by the housing, and the state of being mutually opposed in the state supported by sliding the housing Direction, the first movable contactor having the first and second contactors that can be interrupted by the arrester side fixed contactor and the bushing side fixed contactor for internal pressure test and slidingly supported by the housing to move forward and backward to be installed on the cable side disconnector side. First and second movable contacts connected to the rotating shaft at a predetermined angle with the second movable contactor having a third contactable contactor connected to the bus bar side fixed contactor, respectively, by rotating the rotating shaft to drive the first and second movable contactors; Since the separation device serving as the second driving lever is provided, it does not require gas treatment at the time of the test and the structure is simple. It is possible to provide a gas insulated switchgear having a separator having excellent operability.

Further, according to claim 2 of the present invention, the first contactor contacts the fatigue-side fixed contactor at the first rotational position of the rotary shaft, and the third contactor contacts the busbar-side fixed contactor for the power distribution, respectively. The second contactor is in contact with the bushing side fixed contactor for pressure test at the rotational position, and the third contactor is in contact with the busbar side fixed contactor for power distribution, and the second contactor is in the bushing side fixed contactor for withstand pressure test at the third rotational position. Since the gas contact operation is not necessary at the time of the test and the structure is small and simple, the gas insulated switchgear having the separation device excellent in operability can be provided.

According to claim 3 of the present invention, in the second invention, operation is performed at the first rotational grip of the rotary shaft, a commercial frequency withstand voltage test at the second rotational position, and a local cable withstand voltage test at the third rotational position, respectively. In addition, it is possible to provide a gas insulated switchgear having a separation device which does not require a gas treatment operation during the test and which has a compact and simple structure and excellent operability.

Claims (3)

A breaker housed in a container filled with insulating gas and one terminal electrically connected to a bus bar disconnector, a cable side disconnector housed in the container and electrically connected to the other terminal of the breaker; A power receiving side cable head electrically connected to a connection cable provided outside the container, an arrester housed in the container, a pressure test bushing attached to the ceiling of the container, the cable side disconnector, the cable head, the lightning arrester, A gas insulated switchgear having a separating device for separating an electrical connection between the bushings for pressure test, wherein the separating device is rotatably supported on the enclosure electrically connected to the power receiving side cable head, and is insulated. A rotating shaft made of a member and slidably supported by the housing to be opposed to each other The first movable contact having first and second contacts intermittent to the arrester side fixed contactor and the bushing side fixed contactor for internal pressure test by moving forward and backward to be supported so as to slide and move on the enclosure. A second movable contactor having a third contactor that is intermittent to the power distribution busbar-side fixed contactor provided on the side disconnector side, connected to the rotational side at a predetermined angle, and rotated by rotation of the rotational side, respectively, And a first and second drive lever for driving the first and second movable contactors. 2. The contactor according to claim 1, wherein the first contactor at the first rotational position of the rotary shaft contacts the arrester fixed contactor, and the third contactor respectively contacts the busbar-side stationary contactor for power distribution, and the second contactor at the second rotational position. The third contactor is in contact with the busbar side fixed contactor respectively for the withstand pressure test bushing side fixed contactor and the second contactor is in contact with the bushing side fixed contactor for the withstand voltage test at a third rotational position. Gas insulated switchgear characterized in that. 3. The gas according to claim 2, wherein operation is carried out at a first rotational position of the rotary shaft, a commercial frequency withstand voltage test at the second rotational position, and a local cable withstand voltage test at the third rotational position, respectively. Insulated switchgear.