JPH0833130A - Combined closed type switchgear - Google Patents

Abstract

PURPOSE:To reduce an installation area by combining a plurality of breakers, disconnectors and grounding devices to be used as facilities in a substation. CONSTITUTION:A second breaker chamber 17 is coupled to a first breaker chamber 11. Above the first breaker chamber 11, a first disconnectory chamber 23 housing a disconnector 2 and a grounding device 7 connected to an end of a breaker 3 within the first breaker 11 is coupled to a second disconnector chamber 24 housing a disconnector 9 and grounding device 10 connected to the other end of the breaker 3 within the first breaker 11. Above the second breaker chamber 17, a third disconnector chamber 40 housing a disconnector 5 and a grounding device 8 connected to one end of a breaker 4 within the second breaker chamber 17 is coupled. The disconnectors in the first to third disconnector chambers are connected to a conductor continued to the outside. The first and second breaker chambers 11 and 17 are mounted on a common frame base.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a compound hermetically closed switchgear.

[0002]

2. Description of the Related Art For example, in a substation facility, when a plurality of lines are drawn in, each line is connected to a transformer through a switching device such as a disconnector or a circuit breaker, and one of the lines fails. In this case, each line is disconnected from the common bus so that it can switch to another line for power transmission or reception, or when any one of the lines is inspected or repaired, the load can be switched without interruption during power transmission and reception. The connection is made through a container.

FIG. 13 shows a circuit connection diagram (single line connection diagram) in which M1 to M3 are lines drawn into substation equipment and CM is a common busbar. The lead-in terminal 1 of each line M1 to M3 is connected to a transformer 6 via a first disconnector 2, a first circuit breaker 3, a second circuit breaker 4, and a second disconnector 5. A first grounding device 7 is connected to the lead-in terminal side of the disconnector 2, and a second grounding device 8 is connected to the transformer 6 side of the disconnector 5 so that they can be grounded freely. Further, the connection points of both the circuit breakers 3 and 4 are connected to the bus bar CM via the third disconnecting switch 9 and also to the third grounding device 10 (manual grounding device) so that they can be grounded freely. Has been done.

Conventionally, in order to construct a switchgear comprising such a disconnector, a circuit breaker and a grounding device, these devices are individually constructed and individually installed. Therefore, there is a drawback that a large installation area is required, and since each device is individually manufactured, the manufacturing cost is high.

[0005]

DISCLOSURE OF THE INVENTION The present invention reduces the configuration by unitizing the switchgear consisting of two circuit breakers, three disconnectors and three grounding devices as one device. The purpose of this is to reduce the installation area and to reduce the manufacturing cost.

[0006]

According to the present invention, there is provided a first circuit breaker chamber containing a first circuit breaker in which fixed electrodes are connected in series, and a second circuit breaker containing a second circuit breaker. And a first disconnector connected to the movable electrode of the first circuit breaker in the upper part of the first circuit breaker chamber on the movable electrode side. A first disconnector chamber provided with a first grounding device connected to the first circuit breaker chamber, and the first circuit breaker chamber and the first circuit breaker chamber inside the first circuit breaker chamber. A second disconnector chamber connected to a fixed electrode of the second circuit breaker and a second disconnector chamber provided with a second grounding device connected to the second disconnector are connected to each other, and A second disconnector, which is connected to the movable electrode of the second circuit breaker, and a third ground which is connected to the third disconnector, in the upper part of the second circuit breaker on the movable electrode side. A third disconnector chamber provided with a connection device, the first to third disconnectors are connected to external lead conductors connected to the outside, respectively, and the first and second circuit breaker chambers are connected in common. It is characterized by being mounted on a frame.

[0007]

According to this structure, the circuit breaker, the disconnector, and the grounding device, which constitute the switchgear necessary for one phase of one line, are constructed as one combined device and unitized. Therefore, the installation area required to install these devices can be reduced compared to the case where individual devices are installed individually. Moreover, since each device is combined, the manufacturing cost is lower than that of manufacturing each device individually.

[0008]

Embodiments of the present invention will be described with reference to the drawings. FIG.
Shows a front view of the switchgear for one phase, and FIG. 2 shows a plan view of the circuit breaker chamber of FIG. 1 in section. Reference numeral 11 denotes a first circuit breaker chamber formed of, for example, a tank, which is installed horizontally and has a movable electrode 12 and a fixed electrode 13 therein.
The circuit breaker 3 is stored. The movable electrode 12 is opened and closed by a drive mechanism 14. The movable electrode 12 and the fixed electrode 13 are provided with contacts 15 and 16, respectively.

Reference numeral 17 is a second circuit breaker chamber composed of a tank,
This is also installed horizontally, and the second circuit breaker 4 having the movable electrode 18 and the fixed electrode 19 is housed inside. The movable electrode 18 is opened and closed by a drive mechanism 20. The movable electrode 18 is provided with a contact 21. In the configuration shown in FIGS. 1 and 2, both circuit breaker chambers 11 and 17 are arranged side by side and integrally connected to each other.
8 are connected to each other by a conductor 22 penetrating the continuous portion. The inside of both breaker chambers 11 and 17 is filled with an insulating gas.

A first disconnector chamber 2 is provided above the circuit breaker chamber 11.
The third disconnector chamber 24 and the second disconnector chamber 24 are integrally connected so as to extend upward. Inside the disconnector chamber 23, a first disconnector 2 having a movable electrode 24 and a fixed electrode 25, and a grounding device 7 removably connected to the fixed electrode 25 are housed. A conductor 26 inserted in the contact 15 is connected to the movable electrode 24.

A current transformer 27 is attached to the upper portion of the disconnector chamber 23, and a bushing 28 is provided on the upper portion thereof. The bushing 28 has a conductor 29 connected to the fixed electrode 25.
Pierces through, and a terminal 30 serving as a lead-in terminal is provided at the tip thereof. The terminal 30 is connected to a line (for example, M1).

Inside the disconnector chamber 24, a third disconnector 9 having a movable electrode 31 and a fixed electrode 32, and the movable electrode 3 are provided.
A third grounding device 10 that is removably connected to 1 is housed. The movable electrode 31 is connected to the conductor 33 inserted in the contact 16.

A current transformer 34 is attached to the upper portion of the disconnector chamber 24, and a bushing 35 is provided on the upper portion thereof. The bushing 35 has a conductor 36 connected to the fixed electrode 32.
Pierces through, and a terminal 37 serving as a lead-in terminal is provided at the tip thereof. The terminal 37 is connected to the bus bar CM.

On the upper part of the circuit breaker chamber 17, there is provided a second disconnector 5 having a movable electrode 38 and a fixed electrode 39, and a fixed electrode 3.
A third disconnector chamber 40 accommodating the second grounding device 8 that is removably connected to the connector 9 is integrally provided so as to extend upward. The movable electrode 38 is connected to the conductor 41 inserted in the contact 21.

A current transformer 42 is attached to the upper portion of the disconnector chamber 40, and a bushing 43 is provided on the upper portion thereof. The bushing 43 has a conductor 44 connected to the fixed electrode 39.
Pierces through, and a terminal 45 serving as a lead-in terminal is provided at the tip thereof. The terminal 45 is connected to the transformer 6.
An insulating gas is filled inside each disconnector chamber and bushing.

FIG. 6 is a connection diagram showing the connection state of each of the above devices. This wiring diagram and the switchgear shown in FIGS. 1 and 2 show one phase, and FIGS. 3 to 6 show the configuration of the three phases. Circuit breaker room 1 for each phase
Attachment legs 46 are attached to the bottoms of the reference numerals 1 and 17, and the attachment legs 46 are commonly supported by a base frame 47. The base frame 47 is supported by a mount 48.

Reference numeral 49 is a drive device 1 for the first circuit breaker 3 of each phase.
4, an operating device box in which an operating device for operating 4 is housed, 50 is an operating device box in which an operating device for operating the drive device 21 of the second circuit breaker 4 of each phase is housed, 51 is a disconnection of each phase A controller box for accommodating a controller 2, a grounding device 7, a disconnector 9 and a grounding device 10 is housed in the operating device box, and 52 is a controller for driving the disconnecting device 5 and the grounding device 8 of each phase. It is an operating device box.

In the above embodiment, the bushing is used to connect to the outside, but the charging part is exposed to the outside. Therefore, when the charging portion is not exposed, a cable may be used as shown in FIGS. 7 and 8. That is, each of the disconnector chambers 23, 24, 40 is provided with a connection flange 55, which is connected to the cable chamber 56.
Connect to.

The cable chambers 56 are arranged side by side in the disconnector chambers, and the cables 57 are provided therein. The cable 57 is connected to each disconnector, and the cable 57 passes through the inside of the cable chamber 56 and is led out to the outside from below. According to this, the charging part is not exposed to the outside. Although not shown, the disconnector chamber of each phase has the same configuration.

Although the circuit breaker chambers 11 and 17 are arranged side by side in the above embodiment, they may be arranged in a straight line. The structure is shown in FIGS. In this case, both circuit breaker chambers 11 and 17 are constructed so that their ends are butted against each other. Therefore, both circuit breaker chambers 11, 17
Can consist of one tank. Further, the conductor 22 in FIG. 2 can be omitted, and the fixed electrodes 13 and 19 of both circuit breakers 3 and 4 can be integrally formed.

[0021]

As described above, according to the present invention, 2
Since the three circuit breakers, three disconnectors, and three grounding devices can be combined and configured as one device, the installation area is the installation area required to separately install the circuit breaker, disconnector, and grounding device. Compared with the above, the production cost is significantly reduced, and the production cost thereof is lower than that in the case of individually producing.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of the present invention with a part cut open.

FIG. 2 is a plan view of a cross section of the circuit breaker chamber of FIG.

FIG. 3 is a front view of the configuration shown in FIG. 1 having a three-phase structure.

FIG. 4 is a plan view of FIG. 3;

FIG. 5 is a side view of FIG. 3;

FIG. 6 is a connection diagram for one phase.

FIG. 7 is a front view showing another embodiment of the present invention with a part cut open.

FIG. 8 is a side view of FIG. 7;

FIG. 9 is a front view showing still another embodiment of the present invention with a part cut open.

10 is a front view of the configuration shown in FIG. 9 having a three-phase structure.

11 is a plan view of FIG.

FIG. 12 is a side view of FIG.

FIG. 13 is a single wire connection diagram showing a connection state in the substation.

[Explanation of symbols]

 2 1st disconnecting switch 3 1st circuit breaker 4 2nd circuit breaker 5 2nd disconnecting switch 7 1st earthing device 8 2nd earthing device 9 3rd disconnecting device 10 3rd earthing device 11th 1 circuit breaker room 17 2nd circuit breaker room 23 1st disconnector room 24 2nd disconnector room 40 3rd disconnector room 48 mount

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tadao Shirai, 18 repair ceremony, Terado-cho, Hyuga-shi, Kyoto Prefecture Incorporated company Inoue Electric Works (72) Inventor, Ikuo Tsubouchi 18 repair ceremony, Terado-cho, Hyuga-shi, Kyoto Prefecture Stock company Inoue Electric Works (72) Inventor, Seiji Yoshimura, No. 18 repair ceremony at Terado-cho, Hyuga-shi, Kyoto Prefecture Stock company Inoue Electric Works

Claims (1)

[Claims] 1. A first electrode in which fixed electrodes are connected in series
A first circuit breaker chamber for accommodating the second circuit breaker and a second circuit breaker chamber for accommodating the second circuit breaker are connected to each other, and are internally provided at an upper part of the movable electrode side of the first circuit breaker chamber A first disconnector chamber connected to a movable electrode of the first circuit breaker and a first disconnector chamber provided with a first grounding device connected to the first disconnector are connected to each other, and At the upper part of the connecting portion of the first and second breaker chambers,
A second disconnector provided therein with a second disconnector connected to the fixed electrodes of the first and second circuit breakers and a second grounding device connected to the second disconnector. And a third disconnector connected to the movable electrode of the second circuit breaker inside the upper part of the second circuit breaker on the movable electrode side and connected to the third disconnector. A third disconnector chamber provided with a third grounding device is connected in series, and the first to third disconnectors are respectively connected to external lead conductors connected to the outside, and the first and second disconnector chambers are connected. A compound enclosed switchgear with a circuit breaker room mounted on a common frame.