CN114830469A

CN114830469A - Switching device

Info

Publication number: CN114830469A
Application number: CN201980102819.XA
Authority: CN
Inventors: 前田多一
Original assignee: Mitsubishi Electric Corp
Current assignee: Mitsubishi Electric Corp
Priority date: 2019-12-13
Filing date: 2019-12-13
Publication date: 2022-07-29
Also published as: DE112019007963T5; WO2021117224A1; JPWO2021117224A1; JP6818943B1

Abstract

A switchgear (1) includes, in a casing (10), breaker chambers (20a, 20b) in which breakers (2a, 2b) are housed, and control chambers (50a, 50b) in which control devices (510, 520, 530, 540) for controlling opening and closing of the breakers are housed, wherein the control chambers (50a, 50b) are disposed in front of the breaker chambers (20a, 20b), the control devices (510, 520, 530, 540) are housed on the side of doors (9a, 9b) of the casing (10), and the control device chambers (510a, 520a, 530b, 540b) having cases (511a, 521a, 531b, 541b) are provided.

Description

Switching device

Technical Field

The present application relates to a switching device.

Background

A power transformation facility is provided with a switchgear in which a circuit breaker for interrupting a load current or an accident current is housed in a casing. As shown in patent document 1, for example, a switchgear is partitioned into a breaker chamber in which a breaker is housed, a bus chamber in which a bus connected to the breaker via a conductor is housed, a cable chamber in which a cable is housed, a control chamber in which control equipment and the like are housed, and the breaker chamber, the bus chamber, the cable chamber, the control chamber, and the like are housed in a housing. The circuit breaker is housed in a container separated from the bus chamber and the low-voltage control chamber, and is provided in a high-voltage equipment chamber defined by a sealed cover, and equipment such as a meter is provided on the rear surface side of a front door defining the low-voltage control chamber.

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open No. 2009-171833

Disclosure of Invention

Technical problem to be solved by the invention

In patent document 1, by the above structure, good heat dissipation is maintained at the time of energization, and maintenance saving is achieved. On the other hand, even if high-temperature and high-pressure gas is rapidly released to the door side due to internal arc when an accident occurs inside the housing, it is required to achieve both suppression of damage to the control room measuring instrument and the control equipment and easy maintenance of the control equipment.

The present application discloses a technique for solving the above-described problem, and an object thereof is to provide a switchgear capable of suppressing damage to a control device and achieving maintainability of the control device at the same time.

Technical scheme for solving technical problem

The switchgear disclosed in the present application includes a circuit breaker chamber and a control chamber in the inside of a frame, the circuit breaker chamber accommodates a circuit breaker, the control chamber accommodates a control device that controls opening and closing of the circuit breaker, wherein the control chamber is disposed in front of the circuit breaker chamber, the control chamber is provided with the control device chamber accommodating the control device on the door side of the frame.

Effects of the invention

According to the switching device disclosed in the present application, damage to the control device can be suppressed, and maintainability of the control device can be achieved at the same time.

Drawings

Fig. 1 is a side sectional view showing the structure of a switchgear of embodiment 1.

Fig. 2 is a front view showing the structure of the switchgear of embodiment 1.

Fig. 3 is a cross-sectional view showing a partial structure of the switchgear of embodiment 1.

Fig. 4 is a cross-sectional view showing a state after a small door of the control device room in fig. 3 is opened.

Fig. 5 is a cross-sectional view showing a partial structure of another switchgear of embodiment 1.

Fig. 6 is a cross-sectional view showing a partial structure of a switchgear of embodiment 2.

Fig. 7 is a cross-sectional view showing a state in which the door of fig. 6 is opened.

Fig. 8 is a side sectional view showing the structure of a switchgear of embodiment 3.

Detailed Description

The present embodiment will be described below with reference to the drawings. In the drawings, the same reference numerals denote the same or corresponding parts.

Embodiment mode 1

Hereinafter, a switching device according to embodiment 1 will be described with reference to the drawings.

Fig. 1 is a right side sectional view showing the structure of a switchgear of embodiment 1. In the figure, the switchgear 1 includes a plurality of compartments inside a housing 10, and is roughly divided into

breaker compartments

20a and 20b, a bus compartment 40, a cable compartment 30, and

control compartments

50a and 50 b. This embodiment is an example including two vacuum Circuit breakers (vacuum Circuit breakers) as the Circuit breakers.

The upper-stage circuit breaker 2a is housed in the breaker chamber 20a, and has one end connected to the cable in the cable chamber 30 via a bushing 61a and the other end connected to the bus bar in the bus bar chamber 40 via a bushing 62 a. A device for controlling opening and closing of the breaker 2a is disposed in the control room 50 a. Similarly, the lower breaker 2b is housed in the breaker chamber 20b, and has one end connected to the cable in the cable chamber 30 via the bushing 61a and the other end connected to the bus bar in the bus bar chamber 40 via the bushing 62 a. The equipment for controlling the opening and closing of the breaker 2b is disposed in the control room 50b for housing the equipment.

Control room 50a is disposed in front of breaker room 20a, and control room 50b is disposed in front of breaker room 20 b. The structure of the

control rooms

50a, 50b will be described with reference to fig. 2.

Fig. 2 is a front view showing the structure of the switchgear of embodiment 1. The control room 50a includes

control device rooms

510a and 520 a. The control device room 510a includes a cabinet 511a and a small door 512a, and has the control device 510 therein. The small door 512a of the control device room 510a is attached to the door 9a of the housing 10. Similarly, the control device room 520a includes a box 521a and a small door 522a, and has the control device 520 therein. The small door 522a of the control device room 520a is also attached to the door 9a of the housing 10. The

control devices

510 and 520 are devices for controlling opening and closing of the circuit breaker 2a, protection relays, various relays, switches, fuses, test terminals, and the like, and are attached to the respective

small doors

512a and 522 a.

The control room 50b is also similar in structure to the control room 50 a. The control room 50b includes

control device rooms

530b and 540 b. The control device room 530b includes a cabinet 531b and a small door 532b, and has the control device 530 therein. The small door 532b of the control device room 530b is attached to the door 9b of the frame 10. Similarly, the control device room 540b includes a box body 541b and a small door 542b, and has the control device 540 therein. The small door 542b of the control device room 540b is also attached to the door 9b of the housing 10. The

control devices

530 and 540 are devices for controlling opening and closing of the circuit breaker 2b, protection relays, various relays, switches, fuses, test terminals, and the like, and are attached to the respective

small doors

532b and 542 b.

Fig. 3 is a partial cross-sectional view of the switchgear 1 viewed from the direction of the arrow X-X in fig. 2, which shows a partial structure of the control room 50a including the control device room 510 a. The control line 51 as a wiring for the control device 510 is connected via a connection unit 52 provided on a side portion of the housing 511a of the control device chamber 510 a. The connection portion 52 is configured to close a gap of an opening portion through which the control wire 51 passes. For example, the connection portion 52 may be formed by filling an opening of the case 511a with putty (japanese: パテ), or the control wire 51 may be inserted and removed by using a sealed terminal, a cable ground, a connector, or a sleeve so as to close a gap of the case 511 a. The opening and the connection portion 52 may be located not at the side of the case 511a, but at the upper, lower, and rear side portions.

Fig. 4 is a diagram showing a state in which the small door 512a is opened in fig. 3. Since the box 511a remains between the small door 512a and the control room 50a even when the small door 512a is opened, the control device 510 can be pulled out to the small door 512a side without directly exposing the control room 50a to the outside, thereby facilitating maintenance. For maintenance or the like, the door 9 of the housing 10 need not be opened, and a small door corresponding to each control device may be opened.

Fig. 5 is a diagram showing an example in which the control device 510 is provided in the case 511a without being attached to the small door 512 a. Thus, even if the control device 510 is not attached to the small door 512a, the small door 512a is opened, and the maintenance work is good.

As described above, according to embodiment 1, by providing the control device chamber for housing the control device in the control chamber, even if the high-temperature gas enters the control chamber when the internal arc is generated, or even if the pressure rises sharply, the influence of the entry of the high-temperature gas and the pressure rise can be suppressed by the casing of the control device chamber, and damage to each control device can be suppressed. Further, since the connection of the control wire is performed by providing the connection portion so as to close the gap of the case, the entry of the high-temperature gas into the connection portion is suppressed.

In addition, the control equipment room is provided at the door of the front frame, so that the distance from the breaker can be ensured.

Further, since the small doors are provided in the control device room, the small doors can be opened and closed for the maintenance of the control device, and the maintainability can be improved.

Further, if the control equipment room is formed by integrating the box body and the small door, there is an advantage that the sealing property can be easily ensured, but if the sealing property can be ensured, the integration is not necessary. The box body can also be used as a cover of the control equipment during the operation of the switch device and can be detached during maintenance.

Embodiment mode 2

Hereinafter, a switching device according to embodiment 2 will be described with reference to the drawings.

While the control device room is configured using the box and the small door in embodiment 1, the control device room is configured such that the control device is directly attached to the door 9 of the housing 10 and the box is covered as a cover of the control device in embodiment 2.

Fig. 6 is a partial cross-sectional view of the switchgear 1, which shows a partial structure of the control room 50a including the control device room 510 a. The control device 510 is attached to the door 9 of the housing 10, and the box 511a covers the control device 510 and accommodates the control device 510 therein. Thus, the control device room 510a is formed by a part of the door 9 and the box 511 a. An opening is provided for pulling out the control wire 51, and a connection portion 52 is provided to close a gap therebetween. The structure and the like of the connection portion 52 are the same as those of embodiment 1.

Fig. 7 shows a state in which the door 9 is opened in fig. 6. The case 511a is detachably attached to the door 9, and when the control device 510 is maintained, the case 511a may be detached with the door 9 opened as shown in fig. 7.

As described above, according to embodiment 2, the same effects as those of embodiment 1 are obtained. That is, by providing a control device chamber for housing the control device in the control chamber, even if high-temperature gas enters the control chamber when an internal arc is generated, or even if a rapid pressure rise occurs, the influence of the entry of the high-temperature gas and the pressure rise can be suppressed by the case of the control device chamber, and damage to each control device can be suppressed. Further, since the connection of the control wire is performed by providing the connection portion so as to close the gap of the case, the entry of high-temperature gas into the connection portion is suppressed. In addition, the control equipment room is provided at the door of the front frame, so that the distance from the breaker can be ensured.

Further, since the casing of the control device is detachably provided to the door of the housing, the casing can be detached alone for maintenance of the control device, and both the suppression of damage to the control device and the maintainability can be achieved.

Further, since the small door is not provided, the control device room can be simply configured.

Embodiment 3

Hereinafter, a switching device according to embodiment 3 will be described with reference to the drawings.

In embodiments 1 and 2, an example in which two vacuum interrupters are included as the circuit breaker is described, but two or more vacuum interrupters may be included, or one vacuum interrupter may be included.

Fig. 8 is a diagram showing a configuration of the switchgear 1 including one circuit breaker 2a and one circuit breaker chamber 20 a. It is needless to say that the same effects as those of embodiment 1 are obtained also in this embodiment. As shown in embodiment 2, the control device 510 may be directly provided on the door 9 of the housing 10 without providing the small door 512a of the control device chamber 510 a.

The present disclosure describes various exemplary embodiments and examples, but various features, modes, and functions described in one or more embodiments are not limited to the application to specific embodiments, and can be applied to the embodiments alone or in various combinations.

Therefore, numerous modifications not illustrated are contemplated within the technical scope disclosed in the present specification. For example, the case where at least one component is modified, added, or omitted is included, and the case where at least one component is extracted and combined with the components of the other embodiments is also included.

(symbol description)

1a switching device; 2a, 2b circuit breakers; 9. 9a, 9b doors; 10a frame body; 20a, 20b breaker chambers; 30 a cable chamber; 40 bus chamber; 50a, 50b control room; 51 control lines; 52 a connecting part; 61a, 61b, 62a, 62b sleeves; 510. 520, 530, 540 control devices; 510a, 520a, 530b, 540b control the equipment room; 511a, 521a, 531b and 541 b; 512a, 522a, 532b, 542b wicket.

Claims

1. A switchgear comprising, inside a casing, a breaker chamber in which a breaker is housed and a control chamber in which a control device for controlling opening and closing of the breaker is housed,

the control room is disposed in front of the breaker room, and a control device room in which the control device is stored is provided on a door side of the frame in the control room.

2. The switching device according to claim 1,

the control equipment room is provided with a small door and a box body for containing the control equipment, and the small door is arranged on the door of the frame body.

3. The switching device according to claim 1,

the control device is mounted to a door of the housing, and a box is mounted to the door of the housing and houses the control device.

4. Switching device according to claim 2 or 3,

the box body can be assembled and disassembled.

5. The switching device according to any one of claims 2 to 4,

the control wire connected to the control device is pulled out from the case via a connecting portion having a structure that closes a gap of an opening portion through which the control wire provided in the case passes.