switching device

Abstract

A switch device (1) includes, inside a frame (10), a breaker chamber (20a, 20b) in which breakers (2a, 2b) are housed, and a control chamber (50a, 50b) in which control equipment (510, 520, 530, 540) that controls opening and closing of the breakers is housed, the control chamber (50a, 50b) being disposed in front of the breaker chamber (20a, 20b), the control equipment (510, 520, 530, 540) being housed on a door (9a, 9b) side of the frame (10), and a control equipment chamber (510a, 520a, 530b, 540b) having a box (511a, 521a, 531b, 541b) being provided.

Description

TECHNICAL FIELD

[0001] The present application relates to a switch device. BACKGROUND

[0002] A switch device in which a breaker for cutting off a load current or an accident current is housed in a frame is provided. The switch device is, for example, as shown in Patent Document 1, divided to form 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 a control device or the like is housed, and the like, and these breaker chamber, bus chamber, cable chamber, control chamber, and the like are housed in the frame. Further, the breaker is housed in a container separated from the bus chamber and low-voltage control chamber, and is provided in a high-voltage equipment chamber divided by a closure, and a device such as a metering instrument is provided on the back side of a front door that divides the low-voltage control chamber.

[0003] PRIOR ART DOCUMENTS

[0004] PATENT DOCUMENT

[0005] Patent Document 1: Japanese Patent Laid-Open No. 2009-171833 SUMMARY

[0006] PROBLEMS TO BE SOLVED BY THE INVENTION

[0007] In Patent Document 1, by the above-described structure, good heat dissipation is maintained at the time of energization, and maintenance saving is achieved. On the other hand, even if high-temperature high-pressure gas caused by internal arc at the time of an accident inside the frame is abruptly released to the door side, it is required to simultaneously achieve suppression of damage to a metering instrument or a control device of the control chamber and easy maintenance of the control device.

[0008] The present application discloses a technology for solving the above-described technical problem, and aims to provide a switch device that can suppress damage to a control device and simultaneously achieve maintainability of the control device.

[0009] TECHNICAL SOLUTION

[0010] The switch device disclosed in the present application includes a breaker chamber in which a breaker is housed and a control chamber in which a control device that controls opening and closing of the breaker is housed in the inside of a frame, wherein the control chamber is disposed in front of the breaker chamber, and a control device chamber in which the control device is housed is provided on the door side of the frame in the control chamber.

[0011] EFFECT OF THE INVENTION

[0012] According to the switch device disclosed in the present application, damage to a control device can be suppressed, and maintainability of the control device can be simultaneously achieved. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 is a side sectional view showing the structure of the switchgear of Embodiment 1.

[0014] Figure 2 is a front view showing the structure of the switchgear of Embodiment 1.

[0015] Figure 3 is a lateral sectional view showing the partial structure of the switchgear of Embodiment 1.

[0016] Figure 4 is a lateral sectional view showing the state after opening the small door of the control equipment room in Figure 3 .

[0017] Figure 5 is a lateral sectional view showing the partial structure of another switchgear of Embodiment 1.

[0018] Figure 6 is a lateral sectional view showing the partial structure of the switchgear of Embodiment 2.

[0019] Figure 7 is a lateral sectional view showing the state after opening the door in Figure 6 .

[0020] Figure 8 is a side sectional view showing the structure of the switchgear of Embodiment 3. DETAILED DESCRIPTION

[0021] The present embodiment will be described below with reference to the drawings. Also, in each drawing, the same symbols indicate the same or equivalent parts.

[0022] Embodiment 1

[0023] The switchgear of Embodiment 1 will be described below using the drawings.

[0024] Figure 1 is a right side sectional view showing the structure of the switchgear of Embodiment 1. In the drawing, the switchgear 1 has a plurality of compartments in the inside of the frame body 10, and is roughly divided into the circuit breaker rooms 20a, 20b, the busbar room 40, the cable room 30, the control rooms 50a, 50b. The present embodiment is an example including two vacuum circuit breakers (Vaccum Circuit Breaker) as the circuit breakers.

[0025] The upper breaker 2a is housed in the breaker chamber 20a, one end of which is connected to the cable in the cable chamber 30 via the bushing 61a, and the other end is connected to the busbar in the busbar chamber 40 via the bushing 62a. The device that controls the opening and closing of the breaker 2a is disposed in the control chamber 50a. Similarly, the lower breaker 2b is housed in the breaker chamber 20b, one end of which is connected to the cable in the cable chamber 30 via the bushing 61a, and the other end is connected to the busbar in the busbar chamber 40 via the bushing 62a. The device that controls the opening and closing of the breaker 2b is disposed in the control chamber 50b.

[0026] The control chamber 50a is disposed in front of the breaker chamber 20a, and the control chamber 50b is disposed in front of the breaker chamber 20b. Reference will also be made to Figure 2 The structure of the control chambers 50a, 50b will be described.

[0027] Figure 2 is a front view showing the structure of the switchgear of Embodiment 1. The control chamber 50a has control device chambers 510a, 520a. The control device chamber 510a includes a case 511a and a small door 512a, and has a control device 510 inside. The small door 512a of the control device chamber 510a is installed to the door 9a of the frame 10. Similarly, the control device chamber 520a includes a case 521a and a small door 522a, and has a control device 520 inside. The small door 522a of the control device chamber 520a is also installed to the door 9a of the frame 10. The control devices 510, 520 are devices that control the opening and closing of the breaker 2a, or are protection relays, various relays, switches, fuses, test terminals, and the like, and are installed to the respective small doors 512a, 522a.

[0028] The structure of the control chamber 50b is also the same as that of the control chamber 50a. The control chamber 50b has control device chambers 530b, 540b. The control device chamber 530b includes a case 531b and a small door 532b, and has a control device 530 inside. The small door 532b of the control device chamber 530b is installed to the door 9b of the frame 10. Similarly, the control device chamber 540b includes a case 541b and a small door 542b, and has a control device 540 inside. The small door 542b of the control device chamber 540b is also installed to the door 9b of the frame 10. The control devices 530, 540 are devices that control the opening and closing of the breaker 2b, or are protection relays, various relays, switches, fuses, test terminals, and the like, and are installed to the respective small doors 532b, 542b.

[0029] Figure 3 is a front view showing the structure of the switchgear of Embodiment 1. The control chamber 50a has control device chambers 510a, 520a. The control device chamber 510a includes a case 511a and a small door 512a, and has a control device 510 inside. The small door 512a of the control device chamber 510a is installed to the door 9a of the frame 10. Similarly, the control device chamber 520a includes a case 521a and a small door 522a, and has a control device 520 inside. The small door 522a of the control device chamber 520a is also installed to the door 9a of the frame 10. The control devices 510, 520 are devices that control the opening and closing of the breaker 2a, or are protection relays, various relays, switches, fuses, test terminals, and the like, and are installed to the respective small doors 512a, 522a. Figure 2The partial cross-sectional view of the switch device 1, viewed in the direction of arrow XX, shows a partial structure of the control room 50a, including the control equipment room 510a. The control line 51, which serves as wiring for the control equipment 510, is connected via a connecting portion 52 located on the side of the enclosure 511a of the control equipment room 510a. The connecting portion 52 is configured to seal the gap in the opening through which the control line 51 passes. For example, the connecting portion 52 can be used to fill the opening of the enclosure 511a with putty, or it can be used with a sealing terminal, cable grounding wire, connector, or sleeve to seal the gap in the enclosure 511a, allowing the control line 51 to enter and exit. The opening and connecting portion 52 may not be located on the side of the enclosure 511a, or they may be located on the upper, lower, or rear side.

[0030] Figure 4 It is shown Figure 3 The diagram shows the state when the small door 512a is open. Even with the small door 512a open, the housing 511a remains between the small door 512a and the control room 50a, thus preventing the control room 50a from being directly exposed to the outside. Furthermore, the control device 510 can be pulled out towards the small door 512a, making maintenance easier. During maintenance, etc., it is not necessary to open the door 9 of the housing 10; simply opening the small door corresponding to each control device is sufficient.

[0031] Figure 5 The diagram shows an example where the control device 510 is installed in the housing 511a instead of on the small door 512a. In this way, even if the control device 510 is not installed on the small door 512a, the ease of maintenance is good as long as the small door 512a is opened.

[0032] As described above, according to Embodiment 1, by placing a control equipment chamber that houses the control equipment inside the control room, even if high-temperature gas enters the control room when an internal electric arc is generated, or even in the event of a sudden pressure rise, the enclosure of the control equipment chamber can suppress the entry of high-temperature gas and the effects of pressure rise, thereby preventing damage to each control device. Furthermore, the control lines are connected by providing a connection portion that seals the gaps in the enclosure, thus suppressing the entry of high-temperature gas at the connection portion.

[0033] In addition, the door of the frame is located at the front of the control room, thus ensuring the distance from the circuit breaker.

[0034] Furthermore, since the small doors are located in the control equipment room, they can be opened and closed during the maintenance and repair of the control equipment, thus improving maintainability.

[0035] In addition, if the cabinet and the door are integrated to form the control equipment chamber, there is an advantage that the airtightness can be easily ensured, but if the airtightness can be ensured, the integration is not necessary. The cabinet can be attached as a cover of the control equipment during the operation of the switching device and can be detached during the maintenance.

[0036] Embodiment 2

[0037] Hereinafter, the switching device of Embodiment 2 will be described with reference to the drawings.

[0038] In Embodiment 1, the cabinet and the door are used to form the control equipment chamber, but in Embodiment 2, the control equipment chamber is formed in a manner that the control equipment is directly attached to the door 9 of the frame 10 and the cabinet covers the control equipment as a cover of the control equipment.

[0039] Figure 6 is a partial cross-sectional view of the switching device 1, which shows a partial structure of the control chamber 50a including a control equipment chamber 510a. The control equipment 510 is attached to the door 9 of the frame 10, and the cabinet 511a covers the control equipment 510 and houses the control equipment 510 therein. In this way, the control equipment chamber 510a is formed by a part of the door 9 and the cabinet 511a. An opening portion is provided for drawing out the control line 51, and a connection portion 52 is provided in a manner that the gap therebetween is sealed. The structure of the connection portion 52 and the like is the same as that of Embodiment 1.

[0040] Figure 7 shows Figure 6 the state after the door 9 is opened. The cabinet 511a is attached in a manner that it can be detached from the door 9, and during the maintenance of the control equipment 510, the cabinet 511a can be detached in a state that the door 9 is opened as shown in Figure 7 .

[0041] As described above, according to Embodiment 2, the same effects as those of Embodiment 1 are obtained. That is, by providing the control equipment chamber that houses the control equipment in the control chamber, even if the high-temperature gas enters the control chamber when the internal arc is generated, or even if the sharp pressure rise occurs, the influence of the high-temperature gas entering and the pressure rise is suppressed by the cabinet of the control equipment chamber, so that the damage to each control equipment is suppressed. In addition, the connection of the control line is performed in a manner that the gap of the cabinet is sealed by the connection portion, so that the entry of the high-temperature gas at the connection portion is suppressed. In addition, the control equipment chamber is provided at the door of the frame in the front, so that the distance from the circuit breaker can also be ensured.

[0042] In addition, the cabinet of the control equipment is provided at the door of the frame in a detachable manner, so that during the maintenance and the repair of the control equipment, the cabinet can be individually detached, and the suppression of the damage to the control equipment and the maintainability can be both achieved.

[0043] Further, since the small door is not provided, the control equipment room can be simply configured.

[0044] Embodiment 3

[0045] Hereinafter, the switchgear of Embodiment 3 will be described using the drawings.

[0046] In Embodiments 1 and 2, the example in which two vacuum circuit breakers are included as the circuit breaker is described, but the number of the circuit breakers can be one or more.

[0047] Figure 8 is a view showing the configuration of the switchgear 1 in which one circuit breaker 2a and the circuit breaker room 20a are one room. The same effect as Embodiment 1 is obtained in this embodiment, which is self-evident. Further, as shown in Embodiment 2, the small door 512a of the control equipment room 510a can not be provided, and the control equipment 510 can be directly provided to the door 9 of the frame 10.

[0048] Various features, modes, and functions described in one or more embodiments are not limited to be applied to the specific embodiment, but can be applied to the embodiments alone or in various combinations.

[0049] Therefore, numerous modifications that have not been exemplified are assumed to be within the technical scope disclosed in the present application. For example, cases in which at least one constituent element is modified, added, or omitted are included, and cases in which at least one constituent element is extracted and combined with the constituent element of another embodiment are also included.

[0050] (Symbol Explanation)

[0051] 1 switchgear; 2a, 2b circuit breaker; 9, 9a, 9b door; 10 frame; 20a, 20b circuit breaker room; 30 cable room; 40 busbar room; 50a, 50b control room; 51 control line; 52 connection portion; 61a, 61b, 62a, 62b bushing; 510, 520, 530, 540 control equipment; 510a, 520a, 530b, 540b control equipment room; 511a, 521a, 531b, 541b box; 512a, 522a, 532b, 542b small door.

Claims

1. A switchgear including a breaker chamber in which a breaker is housed and a control chamber in which a control device that controls opening and closing of the breaker is housed, in an interior of a frame, characterized in that the control chamber is disposed in front of the breaker chamber, a control device chamber in which the control device is housed is provided on a door side of the frame in the control chamber, the control device chamber has a small door provided to the door of the frame and a case in which the control device is housed, the case remains between the small door and the control chamber when the small door is in an open state, and the case is provided so as not to expose the control chamber to the outside.

2. The switchgear according to claim 1, characterized in that the control device is attached to the small door.

3. The switchgear according to claim 1, characterized in that the case is detachable.

4. The switchgear according to claim 2, characterized in that the case is detachable.

5. The switchgear according to any one of claims 1 to 4, characterized in that a control line connected to the control device is pulled out from the case via a connection portion having a structure that seals a gap of an opening portion through which the control line provided to the case passes. ​ ​ ​ ​ ​ ​ ​

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