JP2000092635A - Composite switchgear - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a composite switchgear which has a simplified connection structure for a vessel and has a simply formed conductive path to a power equipment to be connected to a breaker. SOLUTION: One end of a breaker tank 2 is provided with an opening 13 for connecting a vessel which opens downward. The opening 13 for connecting a vessel is directly fixed with an arrestor container 25 with a flange 13a by means of a bolt. An electrode 4a in a breaking section is provided with a contact section 14 and an arrestor conductor, provided in a disconnecting section 26 formed at one end of an arrestor 21, is directly connected to the contact section 14. The other end of the arrestor 21 is provided with a disconnector 40. The disconnector 40 moves in the length direction in the arrestor container 25 along supporting bars 45a, 45b for connecting and disconnecting the arrestor conductor and the contact section 14.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a compound switchgear having a simplified electrical and mechanical structure.

[0002]

2. Description of the Related Art In recent years, in order to meet the demands of users to reduce the installation space for power transmission and distribution equipment and to increase the economical efficiency during operation, breakers, lightning arresters, current transformers, grounding devices, disconnectors, and the like have been developed. A composite switchgear has been developed that compactly integrates power equipment.

FIG. 9 is a connection diagram showing an example of connection of power equipment used in such a combined switchgear. In FIG. 9, CB is a circuit breaker, LA is a lightning arrester, E is ground, BC
T1 to BCT4 are bushing current transformers, BG1 and BG2 are bushings, and T1 and T2 are main circuit terminals. The buses of the transmission and distribution system are connected to the main circuit terminals T1 and T2.

FIG. 10 is a vertical front view showing an example of an arrangement of one phase of electric power equipment used in the composite switchgear shown in FIG.
FIG. 11 is a side view partially broken away as viewed from the direction of arrow X in FIG. 10. Next, an example of the arrangement of the combined opening and closing device will be described with reference to FIGS. In FIG. 10, the composite switchgear 1
, A circuit breaker having a circuit breaker 3, a fixed circuit breaker electrode 4a, and a movable circuit breaker electrode 4b is disposed in the circuit breaker tank 2. The center conductors 6a, 6
c is connected.

[0005] One center conductor 6a is connected to the connecting conductor 8 halfway as described later, and the other center conductor 6c is arranged to pass through the bushing 9b. An insulating medium 5 is sealed in the circuit breaker tank 2. The breaking part electrode 4a is supported on one side wall of the circuit breaker tank 2 by the supporting insulator 12a,
The breaker electrode 4b is connected to the breaker tank 2 by the support insulator tube 12b.
Is supported by the other side wall.

A protruding pipe portion 2 is provided near both ends of the circuit breaker tank 2.
a, 2b are formed, and bushing current transformers 11a, 11b are provided on the outer periphery of the protruding pipe portions 2a, 2b. Relay pipe 1 is attached to flange 2x of one protruding pipe section 2a.
0a is connected by a bolt, and the relay pipe 10b is connected by a bolt to the flange 2y of the other protruding pipe section 2b. Also, a bushing 9a is attached to the flange 10x of one of the relay pipes 10a.
Are connected by bolts, and the flange 1 of the other relay pipe 10b is connected.
The bushing 9b is connected to 0y with a bolt. The center conductor 6b is arranged in one bushing 9a.

[0007] The connecting conductor 8 is supported by the insulating spacer 7 in the relay pipe 10a, and connects the center conductor 6a and the center conductor 6b. As shown in FIG. 11, the relay pipe 10a branches in a T-shape from the middle, and the surge arrester container 25 and the flange 25
are connected by bolts. Further, the center conductor 22 is connected to the connection conductor 8 arranged in the relay pipe 10a, and the center conductor 22 is connected to the connection conductor 24 arranged in the lightning arrester container 25.

At one end of the lightning arrester 21, a disconnecting portion 26 is formed.
Is electrically connected to The disconnecting rod 27 is connected to the connecting conductor 2.
4 are electrically connected to the connection conductor 24 by the contacts provided therein, and move up and down in the connection conductor 24 in the vertical direction in the figure. Therefore, the lightning arrester 21 is electrically connected to the interrupter electrode 4a via the center conductor 6a, the connection conductor 8, the center conductor 22, the connection conductor 24, and the disconnecting rod 27.

The upper part of the disconnecting rod 27 is connected to an operating rod 29 via a shield electrode 28, and the operating rod 29 is connected to a sliding rod 30. The upper end of the sliding rod 30 is
Covered by As described above, the combined switchgear shown in FIGS. 10 and 11 includes the circuit breaker tank 2, the relay pipe 10a,
An insulating medium is sealed in a container integrated by connecting the lightning arrester containers 25, and a circuit breaker and a lightning arrester are arranged in this container.

By the way, in the above-mentioned composite switchgear, a high voltage is applied to the circuit breaker at the time of an acceptance test of the circuit breaker or a withstand voltage test at the installation site. Since the high voltage applied at this time exceeds the limit voltage of the surge arrester, it is necessary to disconnect the surge arrester from the circuit breaker before the test.

Therefore, when performing the above-described test of the circuit breaker, the lid 31 is removed to expose the upper part of the slide bar 30, and the lifting tool is connected to the slide bar 30 by screwing it into the slide bar 30 or the like. When the lifting tool is lifted in this state, the sliding rod 30,
Driving force is transmitted to the disconnecting rod 27 through the operating rod 29 and the shield electrode 28, and the disconnecting rod 27 is raised and the distal end is disconnected.
Of the lightning arrester 21 and the breaking electrode 4
The electrical connection with a is released.

[0012]

The conventional compound switchgear requires a relay pipe 10a connected to the projecting pipe section 2a in order to connect the circuit breaker tank 2 and the lightning arrester container 25, and the bushings 9a and 9b are not connected. In order to make the height uniform, the relay pipe 10 is also provided between the bushing 9b and the protruding pipe 2b.
Since b is arranged, there is a problem that the connection structure of the container that houses the composite opening / closing device is complicated, and the cost is increased.

The lightning arrester 21 is disposed in the lightning arrester container 25 branched and connected from the relay pipe 10a, and the circuit breaker and the lightning arrester 2 are disposed in the relay pipe 10a and the lightning arrester container 25.
1 is formed. For this reason, the center conductor 6a connected to the cut-off portion electrode 4a is separated in the relay pipe 10a, and the center conductor 6a and the center conductor 6 are connected via the connection conductor 8.
b is connected. On the other hand, the conductive path from the connection conductor 8 to the lightning arrester 21 includes the center conductor 22, the connection conductor 24, the disconnecting rod 2
7 are formed. As described above, the configuration of the conductive path of the circuit breaker and the conductive path of the lightning arrester connected to the circuit breaker have a problem in that the number of components is increased, the cost is increased, and the connecting operation requires time.

Further, at the time of testing the circuit breaker, a disconnecting rod, an operating rod, and a sliding rod are provided as a disconnecting mechanism for releasing the electrical connection between the circuit breaker and the lightning arrester, and a lifting tool is provided on the sliding rod. Because of the linked configuration, the number of mechanical parts is large, and there is a problem that disconnection operation and electrical connection operation between the circuit breaker and the arrester after the disconnection operation take time.

In view of the above problems, the present invention simplifies the structure of the connection structure of the container accommodating the combined switchgear and the configuration of the conductive path between the circuit breaker and the power equipment to reduce the cost, and at the same time reduces the cost. It is an object of the present invention to provide a composite switchgear capable of easily performing a disconnection operation and subsequent reconnection of the disconnection operation by improving a disconnection mechanism for opening an electrical connection with the switch.

[0016]

SUMMARY OF THE INVENTION The object of the present invention is to provide a composite switchgear according to the first aspect of the present invention, comprising: a circuit breaker having a contact portion on a breaker electrode; a conductive connecting portion and a disconnection mechanism. A power device, a first container for housing the circuit breaker, and a second container arranged in connection with the first container and for housing the power device, wherein a power provided to the contact portion provided on the breaker electrode. This is achieved by a configuration in which a conductive connection portion provided on the device is detachably fitted by a disconnection mechanism.

According to a second aspect of the present invention, in the compound switchgear according to the first aspect, the disconnecting mechanism is provided in the second container along the support rod fixed to the end plate.
It moves in the longitudinal direction of the container.

According to the first aspect of the present invention, since the second container for housing the power equipment is connected to the first container for housing the circuit breaker, the second container for housing the composite switchgear is provided. The connection structure can be simplified. In addition, since the conductive connection portion provided on the power device is detachably fitted to the contact portion provided on the cutoff portion electrode by the disconnection mechanism, the configuration of the conductive path between the circuit breaker and the power device can be simplified. it can. Further, since there is no need to provide a connection conductor for connecting the separated center conductor to the conductive path of the circuit breaker, the configuration of the conductive path of the circuit breaker can be simplified.

As described above, according to the first aspect of the invention, the structure of the connection structure of the container, the conductive path of the circuit breaker, and the conductive path to the power equipment connected to the circuit breaker are simplified. Therefore, the cost of the combined switchgear can be reduced.

According to the second aspect of the present invention, the disconnecting mechanism provided in the power device moves in the length direction of the second container in the second container along the support rod fixed to the end plate. In addition, the support rod acts as a guide for the disconnecting mechanism, and the disconnection operation for opening the electrical connection between the circuit breaker and the power device and the subsequent reconnection thereof can be easily performed. Moreover,
The power device itself moves in the same direction as the disconnecting mechanism with the movement of the disconnecting mechanism.Since the number of mechanical parts is reduced, the configuration is simplified, and in this regard, the cost of the combined switchgear can be reduced. it can.

[0021]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a longitudinal sectional front view showing a composite switchgear according to an embodiment of the present invention for one phase.
10 and 11 are denoted by the same reference numerals, and detailed description is omitted. As shown in FIG. 1, at one end of the circuit breaker tank 2, a container connection opening 13 is provided in a downward direction when viewed at the installation position of the combined switchgear 1 a. In this container connection opening 13,
The lightning arrester container 25 is fixed by a bolt with the flange 13a. That is, the lightning arrester container 25 is arranged so as to be connected to the circuit breaker tank 2.

The contact portion 14 is provided on the cutoff portion electrode 4a, and one end of the lightning arrester 21 is directly connected to the contact portion 14. Lightning arrester 21
A disconnecting device 40, which will be described in detail later, is attached to the other end.
A bushing 9a is connected to the flange 2x of the protruding pipe portion 2a formed at one end of the circuit breaker tank 2, and the installation of the relay pipe 10a as shown in FIG. 10 is omitted. Also, a bushing 9b is connected to the flange 2y of the protruding pipe portion 2b formed at the other end of the circuit breaker tank 2, and the installation of the relay pipe 10b is omitted.

As described above, in FIG. 1, since the lightning arrester container 25 is directly connected to the circuit breaker tank 2, the structure of the container for accommodating the combined switchgear is simplified. Further, since the relay pipes 10a and 10b are omitted, the height of the combined switchgear is reduced, and the installation space can be saved. Furthermore,
In order to form a conductive path to the lightning arrester 21
It is not necessary to separate the center conductor into two, 6a and 6b, by the connecting conductor 8 in a, and the configuration of the conductive path of the circuit breaker is simplified.

FIG. 2 is an enlarged vertical sectional front view of a main part of FIG. Disconnect part 2 provided at one end of lightning arrester 21
6, the lightning arrester conductor 32 is projected. An end plate 46 is fixed to an end of the lightning arrester container 25 with bolts 47a and 47b to seal the insulating medium 5. The lightning arrester conductor 32 is fitted into the contact portion 14 provided on the interrupting portion electrode 4a, and the lightning arrestor 21
Is formed. That is, the lightning arrester conductor 32 is
It functions as a conductive connection part for electrically connecting the circuit breaker and the lightning arrester.

A flange 40a is provided at one end of the disconnecting device 40.
And support rods 45a and 45b fixed to the end plate 46 are inserted into insertion holes formed in the flange 40a, and bolts 48
The lightning arrester 21 and the disconnecting device 40 are connected by a and 48b. Thus, the disconnecting mechanism of the present invention is constituted by the disconnecting device 40, the flange 40a, and the bolts 48a, 48b. The flange 40a reciprocates in the length direction of the support rods 45a and 45b. Screw hole 46 formed in end plate 46
The lid 41 is fixed to the end plate 46 by inserting and tightening the bolts 42a, 42b into the end plates 46, 46b. 43 is a first O-ring, and 44 is a second O-ring.

Next, a procedure for electrically connecting the circuit breaker and the lightning arrester will be described. Flange 40 of disconnecting device 40
The end opposite to the side where “a” is formed is projected outside from the opening of the end plate 46, and the second O-ring 44 is interposed between the disconnecting device 40 and the end plate 46. In this state, the flange 40a of the disconnecting device 40 is pushed up in the lightning arrester container 25 along the supporting members 45a and 45b, and the lightning arrestor conductor 26 is fitted to the contact portion 14 of the interrupting portion electrode 4a to electrically connect the circuit breaker and the lightning arrester. Connection. Next, the first O-ring 43 and the lid 41 are attached to the disconnecting device 40, and the lid 41 is fixed to the end plate 46 with bolts 42a and 42b.

The procedure for disconnecting the circuit breaker and the lightning arrester is the reverse of the procedure for electrical connection between the two. That is, the lid 41 is removed from the end plate 46, one end of the disconnecting device 40 is exposed and a tensile force is applied, and the flange 40a is lowered in the lightning arrester container 25 along the support rods 45a and 45b.
The lightning arrester conductor 26 is detached from the contact portion 14 of the cut-off portion electrode 4a. As described above, the lightning arrester conductor 26 and the interrupter electrode 4a
The contact portion 14 is detachably fitted by a disconnecting device 40.

The disconnecting device 40 connected to the lightning arrester 21 is configured to move in the length direction of the lightning arrester container 25 in the lightning arrester container 25 along the support rods 45a and 45b fixed to the end plate 46. , 45b function as a guide and can easily perform a disconnection operation for opening the electrical connection between the circuit breaker and the lightning arrester and the subsequent reconnection.

As described above, the structure of the combined switchgear shown in FIGS. 1 and 2 is such that the lightning arrester conductor 32 is formed at the disconnecting portion 26 provided at one end of the lightning arrester 21, and the other end of the lightning arrester 21 is connected to the disconnecting device. 40 and the lightning arrester container 2 of the disconnecting device 40.
The lightning arrester 21 itself also moves in the lightning arrester container 25 in accordance with the movement inside the lightning arrester 5, and makes an electrical connection with the circuit breaker and opens it. That is, the formation of the conductive path between the circuit breaker and the lightning arrester and the opening of the conductive path are performed by a common mechanism.

[0030] For this reason, electrical parts such as connection conductors provided between the circuit breaker and the lightning arrestor and mechanical parts for disconnecting the circuit breaker and the lightning arrestor, which are conventionally required, become unnecessary. To reduce and simplify the configuration.

FIG. 3 is a schematic side view showing the composite switchgear shown in FIG. 1 in a three-phase configuration. In FIG. 3, 5
Numeral 0 denotes a frame for fixing the composite switchgear 1a, numeral 51 denotes an electric spring operating device for closing a circuit breaker, and numeral 52 denotes an electric wire outlet tube. Since the lightning arresters 21a, 21b, 21c provided in each phase are directly connected to the circuit breaker tank, the composite switchgear 1
a is configured to be compact as a whole and attached to the gantry 50.

In the example shown in FIG. 1, the lightning arrester container 25 is connected to the lower side of the circuit breaker tank 2 when viewed at the installation position of the composite switchgear 1a, and the lightning arrester 21 is connected to the breaker electrode 4a on the fixed side of the circuit breaker. I have. However, in the present invention, the connection position of the lightning arrester container 25 to the circuit breaker tank 2 and whether the lightning arrester 21 is connected to the fixed-side electrode 4a on the fixed side of the circuit breaker or to the movable-side electrode 4b on the movable side is determined. , Can be arbitrarily selected. Next, FIG. 4, FIG.
A modified example of the present invention will be described with reference to a vertical plan view of FIG.

The example of FIG. 4 shows an opening for connecting a container in the direction below the circuit breaker tank 2 when viewed from the installation position of the compound switchgear 1a at the end of the circuit breaker tank 2 opposite to the example of FIG. 13, the surge arrester container 25 is connected to the flange 13a. Further, the lightning arrester 21 is connected to the contact portion 14 provided on the movable-side cutoff portion electrode 4b.

In the example of FIG. 5, a container connection opening is formed on one side wall of the circuit breaker tank 2, and the surge arrester container 25 is connected to the flange 13a. In this example, the circuit breaker tank 2 and the lightning arrester container 25 are connected in series in the longitudinal direction. Further, the lightning arrester 21 is connected to the contact portion 14 provided on the side surface of the fixed-side blocking portion electrode 4a.

In the example of FIG. 6, an opening for container connection is formed in one end of the circuit breaker tank 2 on the basis of the installation position of the composite switchgear 1a, and the surge arrester container 25 is connected to the flange 13a. are doing. In this example, the lightning arrester container 25 is so arranged that the direction of the circuit breaker tank 2 is different from that of FIG.
Will be connected. Further, the lightning arrester 21 is connected to the contact portion 14 provided on the fixed-side cutoff portion electrode 4a.

In the example shown in FIG. 7, an opening for connecting a container is formed in the other end of the circuit breaker tank 2 in the lateral direction with reference to the installation position of the combined switchgear 1a, and the surge arrester container 25 is connected to the flange 13a. are doing. Further, the lightning arrester 21 is connected to the contact portion 14 provided on the movable-side cutoff portion electrode 4b.

FIG. 8 is a vertical sectional view showing still another configuration. In this example, a lightning arrester having a container connection opening formed laterally at one end of the circuit breaker tank 2 with reference to the installation position of the combined switchgear 1a and having a substantially L-shape formed on the flange 13a. The container 25 is connected. The lightning arrester 21 arranged in the lightning arrester container 25 is arranged in parallel with the circuit breaker.

Further, a center conductor 22 for connecting a lightning arrester is connected to the blocking part electrode 4a on the fixed side of the circuit breaker. The center conductor 22 is connected to the connection conductor 24, and the lightning arrester conductor provided at the tip of the lightning arrester 21 is inserted into a contact portion 24 a formed on the connection conductor 24 to electrically connect the lightning arrester 21 and the circuit breaker. The connection conductor 24 is supported in the surge arrester container 25 by the insulating spacer 23.

Also in this example, as the disconnecting device 40 moves in the length direction in the lightning arrester container 25, the lightning arrester 21 is moved.
The arrester itself also moves within the arrester container 25 to make an electrical connection with the circuit breaker and open it. That is, since the formation of the conductive path between the circuit breaker and the lightning arrester and the opening of the conductive path are performed by a common mechanism, the number of parts is reduced as compared with the conventional combined switchgear.

In each of the above examples, the combined switchgear for connecting the circuit breaker and the lightning arrester has been described. In the present invention, the power equipment connected to the circuit breaker is not limited to the lightning arrester, and it is also possible to apply a grounding device, a disconnector, a transformer for an instrument, and the like.

Further, in each of the above-described examples, the example in which the circuit breaker tank and the lightning arrester container are connected by bolts with flanges has been described. In the present invention, the container for storing the circuit breaker and the container for storing another power device such as a lightning arrester can be connected by welding. Further, it is also possible to integrally form a container for accommodating the circuit breaker and a container for accommodating other power devices such as a lightning arrester by casting.

[0042]

As described above, according to the first aspect of the present invention, since the second container for storing the power equipment is connected to the first container for storing the circuit breaker, the structure is complex. The connection structure of the container that houses the opening and closing device can be simplified. Also, since the conductive connection portion provided on the power device is detachably fitted to the contact portion provided on the cutoff portion electrode by the disconnection mechanism,
The configuration of the conductive path to the power device connected to the circuit breaker can be simplified. Further, since there is no need to provide a connection conductor for connecting the separated center conductor to the conductive path of the circuit breaker, the configuration of the conductive path of the circuit breaker can be simplified.

As described above, according to the first aspect of the present invention, since the connection structure of the container, the conductive path of the circuit breaker, and the conductive path to the power equipment connected to the circuit breaker have a simple configuration, the structure is complex. The cost of the switchgear can be reduced.

According to the second aspect of the present invention, the disconnecting mechanism provided in the power device moves in the length direction of the second container in the second container along the support rod fixed to the end plate. In addition, the support rod acts as a guide for the disconnecting mechanism, and the disconnection operation for opening the electrical connection between the circuit breaker and the power device and the subsequent reconnection thereof can be easily performed. Moreover,
The power device itself moves in the same direction as the disconnecting mechanism with the movement of the disconnecting mechanism.Since the number of mechanical parts is reduced, the configuration is simplified, and in this regard, the cost of the combined switchgear can be reduced. it can.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional front view showing a configuration of one phase of a combined switchgear according to an embodiment of the present invention.

FIG. 2 is a longitudinal sectional front view showing a part of FIG. 1 in an enlarged manner.

FIG. 3 is a schematic side view showing an installation example of the composite opening / closing device of FIG. 1;

FIG. 4 is a longitudinal sectional front view showing a configuration of one phase of a combined switchgear according to another embodiment of the present invention.

FIG. 5 is a longitudinal sectional front view showing a configuration of one phase of a combined switchgear according to another embodiment of the present invention.

FIG. 6 is a vertical cross-sectional view showing a configuration of a combined switchgear according to another embodiment of the present invention.

FIG. 7 is a vertical cross-sectional view showing a configuration of a combined switchgear according to another embodiment of the present invention.

FIG. 8 is a vertical cross-sectional view showing a configuration of a combined switchgear according to another embodiment of the present invention.

FIG. 9 is a connection diagram of a combined switchgear to which the present invention is applied.

FIG. 10 is a vertical cross-sectional front view showing a configuration of one phase of a conventional compound switching device.

FIG. 11 is a side view partially cut away as viewed in the direction of arrow X in FIG. 10;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1, 1a Composite switchgear 2 Circuit breaker tank 3 Breaking part 4a Fixed side breaking part electrode 4b Moving side breaking part electrode 5 Insulating medium 6a-6c Central conductor 9a, 9b Bushing 10a, 10b Relay piping 11a, 11b Bushing current flow Device 14 Contact part 21 Lightning arrester 25 Lightning arrester container 26 Disconnecting part 32 Lightning arrestor conductor 40 Disconnecting device 45a, 45b Support rod 46 End plate

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Koji Ibusuki 18 repair service ceremony at Teradocho, Mukoichi-shi, Kyoto F-term in Inoue Electric Works Co., Ltd. 5G017 AA15 JJ02

Claims (2)

[Claims] 1. A circuit breaker having a contact portion on a breaking portion electrode;
An electric power device provided with a conductive connection portion and a disconnection mechanism, a first container for housing a circuit breaker, and a second container arranged in connection with the first container and for housing the electric power device, A composite switchgear, characterized in that a conductive connecting part provided on a power device is detachably fitted to a contact part provided on a unit electrode by a disconnection mechanism. 2. The apparatus according to claim 1, wherein the disconnecting mechanism is configured to move in a length direction of the second container in the second container along a support rod fixed to an end plate. Combined switchgear.