WO2021117224A1

WO2021117224A1 - Switchgear

Info

Publication number: WO2021117224A1
Application number: PCT/JP2019/048953
Authority: WO
Inventors: 多一前田
Original assignee: 三菱電機株式会社
Priority date: 2019-12-13
Filing date: 2019-12-13
Publication date: 2021-06-17
Also published as: JPWO2021117224A1; DE112019007963T5; JP6818943B1; CN114830469A

Abstract

A switchgear (1) comprising, inside a housing (10): breaker compartments (20a, 20b) in which breakers (2a, 2b) are accommodated; and control compartments (50a, 50b) in which control instruments (510, 520, 530, 540) that control the opening and closing of the breakers are accommodated, wherein the control compartments (50a, 50b) are positioned forward of the breaker compartments (20a, 20b), and control instrument compartments (510a, 520a, 530b, 540b), in which the control instruments (510, 520, 530, 540) are accommodated and which have box bodies (511a, 521a, 531b, 541b), are provided on the door (9a, 9b) side of the housing (10).

Description

Switch gear

This application relates to switch gears.

In the substation equipment, a switch gear is installed in which a circuit breaker for interrupting the load current or the accident current is housed in the housing. As shown in Patent Document 1, for example, the switch gear includes a circuit breaker chamber in which a circuit breaker is housed, a bus chamber in which a bus is connected to the circuit breaker via a conductor, and a cable chamber in which a cable is housed. A control room or the like in which the control equipment or the like is stored is formed into a section and stored in the housing. In addition, the circuit breaker is housed in a container separated from the bus room and the low-voltage control room, installed in the high-voltage equipment room partitioned by a sealed cover, and equipment such as instruments is placed behind the front door that partitions the low-voltage control room. is set up.

Japanese Unexamined Patent Publication No. 2009-171833

Patent Document 1 realizes maintenance saving while maintaining good heat dissipation when energized by the above configuration. On the other hand, even if the high-temperature and high-pressure gas generated by the internal arc when an accident occurs inside the housing is suddenly released to the door side, damage to the instruments or control equipment in the control room is suppressed and maintenance of the control equipment is easy. It is required to balance what can be done.

The present application discloses a technique for solving the above problems, and an object of the present application is to provide a switch gear capable of suppressing damage to a control device and achieving both maintainability of the control device.

The switch gear disclosed in the present application is a switch gear including a circuit breaker chamber in which a circuit breaker is housed and a control room in which a control device for controlling the opening and closing of the circuit breaker is housed inside the housing. The control room is arranged in front of the circuit breaker room, and a control device room in which the control device is housed is provided on the door side of the housing in the control room.

According to the switch gear disclosed in the present application, it is possible to suppress damage to the control device and to achieve both maintainability of the control device.

It is a side sectional view which shows the structure of the switch gear which concerns on Embodiment 1. FIG. It is a front view which shows the structure of the switch gear which concerns on Embodiment 1. FIG. It is a cross-sectional view which shows the partial structure of the switch gear which concerns on Embodiment 1. FIG. FIG. 3 is a cross-sectional view showing a state in which the small door of the control equipment room is opened. It is a cross-sectional view which shows the partial structure of another switch gear which concerns on Embodiment 1. FIG. It is a cross-sectional view which shows the partial structure of the switch gear which concerns on Embodiment 2. FIG. FIG. 6 is a cross-sectional view showing a state in which the door is opened in FIG. It is a side sectional view which shows the structure of the switch gear which concerns on Embodiment 3. FIG.

Hereinafter, the present embodiment will be described with reference to the drawings. In each figure, the same reference numerals indicate the same or corresponding parts.

Embodiment 1.
Hereinafter, the switch gear according to the first embodiment will be described with reference to the drawings.
FIG. 1 is a cross-sectional view on the right side showing the configuration of the switch gear according to the first embodiment. In the figure, the switch gear 1 has a plurality of compartments inside the housing 10, and is roughly divided into a

circuit breaker chamber

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

control chamber

50a and 50b. This embodiment is an example in which two vacuum circuit breakers are provided as circuit breakers.

The upper circuit breaker 2a is housed in the circuit breaker chamber 20a, and one end is connected to the cable in the cable chamber 30 via the bushing 61a and the other end is connected to the bus in the bus chamber 40 via the bushing 62a. A device for controlling the opening and closing of the circuit breaker 2a is arranged in the control chamber 50a. Similarly, the lower circuit breaker 2b is housed in the circuit breaker chamber 20b, and one end is connected to the cable in the cable chamber 30 via the bushing 61b and the other end is connected to the bus in the bus chamber 40 via the bushing 62b. Ru. It is arranged in a control chamber 50b that houses a device that controls the opening and closing of the circuit breaker 2b.

The control chamber 50a is arranged in front of the circuit breaker chamber 20a, and the control chamber 50b is arranged in front of the circuit breaker chamber 20b. The structures of the

control chambers

50a and 50b will be described with reference to FIG.
FIG. 2 is a front view showing the configuration of the switch gear according to the first embodiment. The control room 50a includes a

control device room

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

control devices

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

small doors

512a and 522a.

The structure of the control chamber 50b is the same as that of the control chamber 50a. The control room 50b includes a

control equipment room

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

control devices

530 and 540 are devices for controlling the opening and closing of the circuit breaker 2b, protection relays, various relays, switches, fuse links, test terminals, etc., and are attached to the

small doors

532b and 542b, respectively.

FIG. 3 is a partial cross-sectional view of the switch gear 1 viewed from the direction of arrows XX in FIG. 2, showing a partial configuration of the control chamber 50a including the control equipment chamber 510a. The control line 51, which is the wiring for the control device 510, is connected via a connection portion 52 provided on the side of the box body 511a of the control device room 510a. The connecting portion 52 is configured to close the gap of the opening through which the control line 51 passes. For example, the connection portion 52 may fill the portion where the box body 511a is opened with putty, or use a sealing terminal, a cable gland, a connector, or a bushing to insert and remove the control line 51 so as to close the gap of the box body 511a. Do. The opening and the connecting portion 52 may be not the side portion of the box body 511a, but may be the upper portion, the lower portion, and the back side portion.

FIG. 4 is a diagram showing a state when the small door 512a is opened in FIG. Even if the small door 512a is opened, the box body 511a remains between the small door 512a and the control room 50a is not directly exposed to the outside, and the control device 510 can be pulled out to the small door 512a side for maintenance. Becomes easier. At the time of maintenance or the like, it is not necessary to open the door 9 of the housing 10, and it is sufficient to open the corresponding small door for each control device.

FIG. 5 is a diagram showing an example in which the control device 510 is not attached to the small door 512a but is installed in the box body 511a. As described above, even if the control device 510 is not attached to the small door 512a, the workability at the time of maintenance is good if the small door 512a is opened.

As described above, according to the first embodiment, by providing the control equipment room for accommodating the control equipment in the control room, even if a high temperature gas invades the control room when an internal arc is generated, or when the pressure rises sharply However, the box body in the control equipment room can suppress the influence of high temperature gas intrusion and pressure rise, and can suppress damage to each control equipment. Further, since the control line is also connected by providing the connecting portion so as to close the gap of the box body, the intrusion of high temperature gas at the connecting portion is suppressed.
Further, since the control equipment room is provided on the door of the front housing, it is possible to secure a distance from the circuit breaker room.
In addition, since a small door is provided in the control equipment room, maintenance and inspection of the control equipment can be handled by opening and closing individual small doors, and maintainability is improved.

Note that if the box body and the small door are integrated to form the control equipment room, there is an advantage that the airtightness can be easily secured, but if the airtightness can be ensured, it is not necessary to integrate them. The box body may be attached as a cover of the control device during the operation of the switch gear so that it can be removed during maintenance.

Embodiment 2.
Hereinafter, the switch gear according to the second embodiment will be described with reference to the drawings.
In the first embodiment, the control device room is configured by using the box body and the small door, but in the second embodiment, the control device is directly attached to the door 9 of the housing 10 to cover the box body as a cover of the control device. The control equipment room was configured as described above.

FIG. 6 is a partial cross-sectional view of the switch gear 1 and shows a partial configuration of the control chamber 50a including the control equipment chamber 510a. The control device 510 is attached to the door 9 of the housing 10, and the control device 510 is housed in the box body 511a so as to cover the control device 510. In this way, a part of the door 9 and the box body 511a form a control equipment room 510a. The box body is provided with an opening for pulling out the control line 51, and a connecting portion 52 is provided so as to close the gap. The configuration of the connecting portion 52 and the like are the same as those in the first embodiment.

FIG. 7 shows a state in which the door 9 is opened in FIG. The box body 511a is detachably attached to the door 9, and at the time of maintenance of the control device 510, the box body 511a may be removed with the door 9 open as shown in FIG.

As described above, according to the second embodiment, the same effect as that of the first embodiment is obtained. That is, by providing a control equipment room for accommodating the control equipment in the control room, even if a high temperature gas invades the control room when an internal arc is generated, or even if a sudden pressure rise occurs, the box body of the control equipment room It is possible to suppress the influence of high temperature gas intrusion and pressure rise, and to suppress damage to each control device. Further, since the control line is also connected by providing the connecting portion so as to close the gap of the box body, the intrusion of high temperature gas at the connecting portion is suppressed. Further, since the control equipment room is provided on the door of the front housing, it is possible to secure a distance from the circuit breaker room.
In addition, since the box body of the control equipment room is detachably provided on the door of the housing, the box body can be removed individually for maintenance and inspection of the control equipment, and damage to the control equipment can be suppressed and maintainability can be achieved at the same time. Can be planned.
Further, since the small door is not provided, the control equipment room can be easily configured.

Embodiment 3.
Hereinafter, the switch gear according to the third embodiment will be described with reference to the drawings.
In the first and second embodiments, an example in which two vacuum circuit breakers are provided as the circuit breakers has been described, but the number may be two or more or one.
FIG. 8 is a diagram showing a configuration of a switch gear 1 having one circuit breaker 2a and one circuit breaker chamber 20a. Needless to say, this embodiment also has the same effect as that of the first embodiment. Further, as shown in the second embodiment, the control device 510 may be provided directly on the door 9 of the housing 10 without providing the small door 512a of the control device room 510a.

Although the present disclosure describes various exemplary embodiments and examples, the various features, embodiments, and functions described in one or more embodiments are those of a particular embodiment. It is not limited to application, but can be applied to embodiments alone or in various combinations.
Therefore, innumerable variations not illustrated are envisioned within the scope of the techniques disclosed herein. For example, it is assumed that at least one component is modified, added or omitted, and further, at least one component is extracted and combined with the components of other embodiments.

1: Switch gear, 2a, 2b: Circuit breaker, 9, 9a, 9b: Door, 10: Housing, 20a, 20b: Circuit breaker room, 30: Cable room, 40: Bus room, 50a, 50b: Control room, 51 : Control line, 52: Connection part, 61a, 61b, 62a, 62b: Bushing, 510, 520, 530, 540: Control equipment, 510a, 520a, 530b, 540b: Control equipment room, 511a, 521a, 513b, 541b: Box body, 512a, 522a, 532b, 542b: Small door.

Claims

A switch gear having a circuit breaker chamber in which a circuit breaker is housed and a control room in which a control device for controlling the opening and closing of the circuit breaker is housed inside the housing.
A switch gear in which the control room is arranged in front of the circuit breaker room, and a control device room in which the control device is housed is provided on the door side of the housing in the control room.
The switch gear according to claim 1, wherein the control equipment room has a small door and a box body for accommodating the control equipment, and the small door is provided on the door of the housing.
The switch gear according to claim 1, wherein the control device is attached to the door of the housing, and a box body is attached to the door of the housing to house the control device.
The switch gear according to claim 2 or 3, wherein the box body is removable.
2. The control line connected to the control device is drawn out from the box body via a connecting portion, and the connecting portion has a structure for closing a gap of an opening through which the control line is provided in the box body. The switch gear according to any one of 4 to 4.