SWITCHGEAR

Abstract

Switchgear (1) with a housing (10) the interior of which is partitioned into compartments, wherein the switchgear (1) has a circuit breaker compartment (20a, 20b) which accommodates a circuit breaker (2a, 2b) and a control compartment (50a, 50b) which accommodates a control device (510, 520, 530, 540) for controlling an opening / closing of the circuit breaker (2a, 2b), wherein the control chamber (50a, 50b) is located in front of the circuit breaker chamber (20a, 20b), a control device chamber (510a, 520a, 530b, 540b) which accommodates the control device (510, 520, 530, 540) is provided on one side of a door (9, 9a, 9b) of the housing (10) in the control chamber (50a, 50b), the control device chamber (510a, 520a, 530b, 540b) has a small door (512a, 522a, 532b, 542b) and a box body (511a, 521a, 531b, 541b) which accommodates the control device (510, 520, 530, 540), and the small door (512a, 522a, 532b, 542b) is provided for the door (9, 9a, 9b) of the housing (10), and the box body (511a, 521a, 531b, 541b) is designed such that the control chamber (50a, 50b) is not exposed to the outside world when the small door (512a, 522a, 532b, 542b) is open.

Description

TECHNICAL AREA

[0001] The present disclosure relates to a switchgear assembly. TECHNOLOGICAL BACKGROUND

[0002] In a substation or transformer station, a switchgear assembly is provided which is configured such that a circuit breaker for interrupting a load current or a fault current is housed in an enclosure. In such a switchgear assembly, as shown in patent document 1, compartments such as a circuit breaker compartment housing a circuit breaker, a busbar compartment housing a busbar connected to the circuit breaker via a conductor, a cable compartment housing a cable, and a control compartment housing a control device, and the like, are partitioned and housed in an enclosure. The circuit breaker is housed in a container separate from the busbar compartment and a low-voltage control compartment and is located in a high-voltage device compartment, which is partitioned by a sealed cover.Devices, such as instruments, are placed on the rear side of a front door, forming a compartment or section of the low-voltage control chamber. QUOTE LIST PATENT DOCUMENT

[0003] Patent document 1: JP 2009 - 171 833 A SUMMARY OF THE INVENTION PROBLEMS TO BE SOLVED BY THE INVENTION

[0004] Patent document 1 describes how the configuration described above maintains advantageous heat dissipation during power transmission and achieves maintenance savings. Furthermore, it is essential to prevent damage to instruments or control devices within the control chamber, even if high-temperature, high-pressure gas is rapidly vented to the side of the door due to an internal arc in the event of a fault or defect within the housing. Simultaneously, it is also necessary to ensure that maintenance of the control devices can be performed easily.

[0005] The present disclosure was made to solve the above-mentioned problem, and one objective of the present disclosure is to provide a switching system that can achieve both, namely to prevent damage to control devices and to facilitate the maintenance of the control devices. SOLVING THE PROBLEMS

[0006] This problem is solved by a switchgear assembly according to claim 1. IMPACT OF THE INVENTION

[0007] The switchgear according to the present disclosure achieves both, namely preventing damage to control devices and facilitating maintenance of the control devices. BRIEF DESCRIPTION OF THE DRAWINGS [ Fig. 1] Fig. Figure 1 shows a side sectional view showing the structure of a switchgear assembly according to embodiment 1. [ Fig. 2] Fig. Figure 2 shows a front view, which shows a structure of the switchgear according to embodiment 1. [ Fig. 3] Fig. Figure 3 shows a horizontal sectional view, which shows a partial structure of the switchgear according to embodiment 1. [ Fig. 4] Fig. Figure 4 shows a horizontal sectional view depicting a state in which a small door of a control device chamber is closed. Fig. 3 is open. [ Fig. 5] Fig. Figure 5 shows a horizontal sectional view, which shows another example of a partial structure of the switchgear according to embodiment 1. [ Fig. 6] Fig. Figure 6 shows a horizontal sectional view showing a partial structure of a switchgear assembly according to embodiment 2. [ Fig. 7] Fig. Figure 7 shows a horizontal sectional view, depicting a state in which a door is in Fig. 6 is open. [ Fig. 8] Fig. Figure 8 shows a side sectional view of a switchgear structure according to embodiment 3. DESCRIPTION OF EXECUTION FORMS

[0008] Embodiments of the present disclosure will be described below with reference to the drawings. In the drawings, the same reference numerals denote the same or corresponding parts. Design 1

[0009] A switchgear assembly according to embodiment 1 will be described below with reference to the drawings.

[0010] Fig. Figure 1 shows a right-side sectional view illustrating the structure of the switchgear according to embodiment 1. Fig. In the switchgear 1, within a housing 10, a plurality of compartments or sections can be roughly partitioned into circuit breaker chambers 20a, 20b, a busbar chamber 40, a cable chamber 30, and control chambers 50a, 50b. The present embodiment shows an example in which two vacuum circuit breakers are provided as the circuit breakers.

[0011] On an upper floor, a circuit breaker 2a is installed in circuit breaker chamber 20a and has one end connected via a socket 61a to a cable in cable chamber 30, and another end connected via a socket 62a to a busbar in busbar chamber 40. A device for controlling the opening / closing of circuit breaker 2a is provided in control chamber 50a. Similarly, on a lower floor, a circuit breaker 2b is installed in circuit breaker chamber 20b and has one end connected via a socket 61b to a cable in cable chamber 30, and another end connected via a socket 62b to a busbar in busbar chamber 40. A device for controlling the opening / closing of circuit breaker 2b is provided and is located in control chamber 50b.

[0012] Control chamber 50a is located in front of circuit breaker chamber 20a, and control chamber 50b is located in front of circuit breaker chamber 20b. The structures of control chambers 50a and 50b are also described with reference to Fig. 2 will be described.

[0013] Fig. Figure 2 shows a front view illustrating the structure of the switchgear according to embodiment 1. The control chamber 50a comprises control device chambers 510a and 520a. Control device chamber 510a has a box body 511a and a small door 512a, and contains a control device 510 therein. The small door 512a of control device chamber 510a is attached to a door 9a of the housing 10. Similarly, control device chamber 520a has a box body 521a and a small door 522a, and contains a control device 520 therein. The small door 522a of control device chamber 520a is also attached to the door 9a of the housing 10. The control devices 510, 520 represent devices for controlling the opening / closing of the circuit breaker 2a, or protective relays, other relay types, switches, fuse elements, test terminals, etc., and are each attached to the small doors 512a, 522a.

[0014] The structure of control chamber 50b is similar to that of control chamber 50a. Control chamber 50b comprises control device chambers 530b and 540b. Control device chamber 530b has a box body 531b and a small door 532b, and contains a control device 530 therein. The small door 532b of control device chamber 530b is attached to a door 9b of the housing 10. Similarly, control device chamber 540b has a box body 541b and a small door 542b, and contains a control device 540 therein. The small door 542b of control device chamber 540b is also attached to the door 9b of the housing 10. The control devices 530, 540 represent devices for controlling the opening / closing of the circuit breaker 2b or protective relay, other relay types, switches, fuse elements, test terminals, etc., and are each attached to the small doors 532b, 542b.

[0015] Fig. Figure 3 represents a horizontal sectional view of part of the switchgear 1, viewed in the direction of arrows XX. Fig. Figure 2 shows a partial structure of the control chamber 50a, including the control device chamber 510a. A control cable 51, serving as wiring for the control device 510, is connected via a connecting section 52, which is provided at a side part of the box body 511a of the control device chamber 510a. The connecting section 52 is configured to close a gap in an opening through which the control cable 51 passes. For example, in the connecting section 52, the opening portion of the box body 511a could be filled with a sealant, and the control wire 51 is passed through using a sealed connector, cable joint, connecting device, or socket, thus closing a gap in the box body 511a.The opening and connecting section 52 need not necessarily be located at a side part of the box body 511a and could be located at an upper part, a lower part or a rear part.

[0016] Fig. Figure 4 shows a state in which the small door 512a of the Fig. 3 is open. Even when the small door 512a is open, the housing 511a remains inside the control chamber 50a, so that the control chamber 50a is not directly exposed to the outside world, and meanwhile the control device 510 can be pulled to the side of the small door 512a, thus making maintenance easy. During maintenance or the like, the door 9 of the housing 10 does not need to be opened, and the corresponding small door could be opened for each control device.

[0017] Fig. Figure 5 shows an example in which the control device 510 is provided in the housing 511a without being attached to the small door 512a. In this way, even when the control device 510 is not attached to the small door 512a, workability in maintenance is good when the small door 512a is open.

[0018] As described above according to embodiment 1, the control device chamber, which houses the control device, is provided within the control chamber. Thus, in the event of an internal arc, even if a high-temperature gas enters the control chamber or even if the pressure is sharply increased, the body of the control device chamber prevents the ingress of the high-temperature gas or the pressure increase, thereby preventing damage to any control device. Furthermore, a connection is established between the control cable and the connecting section, which is designed to close the gap in the body, thus preventing the ingress of the high-temperature gas through the connecting section.

[0019] Furthermore, the distance to the circuit breaker chamber can be ensured, since the control device chamber is located at the front door of the housing.

[0020] Since the small door is provided for the control device chamber, it is also possible to perform work by opening / closing the individual small door at the time, such as during maintenance or inspection of the control device, thus improving ease of maintenance.

[0021] Forming the control device chamber by integrating the housing and the small door offers the advantage of easily ensuring a seal. However, the housing and the small door do not necessarily need to be integrated as long as a seal can be guaranteed. The housing could be designed to be fitted as a cover for the control device during operation of the switchgear and removed for maintenance. Design 2

[0022] The following describes a switchgear assembly according to embodiment 2 with reference to the drawings.

[0023] In embodiment 1, the control device chamber is formed using the box body and the small door, whereas in embodiment 2, the control device chamber is arranged such that the control device is attached directly to the door 9 of the housing 10 and that the box body is provided as a cover to cover the control device.

[0024] Fig. Figure 6 shows a horizontal sectional view of part of the switchgear 1 and depicts a partial structure of the control chamber 50a, including the control device chamber 510a. The control device 510 is mounted on the door 9 of the housing 10, and the box body 511a receives the control device 510 within it in such a way that it conceals the control device 510. In this way, the control device chamber 510a is formed by the box body 511a and part of the door 9. The box body has an opening through which the control cable 51 is led to the outside, and the connecting section 52 is designed to close this opening. The structure of the connecting section 52 and the like is the same as in embodiment 1.

[0025] Fig. Figure 7 shows a state in which door 9 of the Fig. 6 is open. The box body 511a is mounted in such a way that it can be removed from the door 9, and during maintenance of the control device 510, the box body 511a could be removed in a state in which the door 9 is open, as shown in Fig. 7 shown.

[0026] Thus, according to embodiment 2, the same effects are provided as in embodiment 1. This means that the control device chamber, which houses the control device, is provided within the control chamber. Therefore, if an internal arc has occurred, even if high-temperature gas has entered the control chamber or even if the pressure increases sharply, the body of the control device chamber prevents the ingress of high-temperature gas and a pressure increase, thereby preventing damage to any control device. Furthermore, a connection for the control cable is provided, with the connecting section being designed to close the gap in the body, thus preventing the ingress of high-temperature gas through the connecting section. Additionally, the removal or...The distance to the circuit breaker chamber must be ensured, as the control device chamber is located at the front door of the housing.

[0027] Since the box body of the control device chamber is designed to be removable from the door of the housing, it is also possible to remove the box body individually at the time, for example during maintenance or inspection of the control device, thereby achieving both the prevention of damage to the control device and the facilitation of maintenance.

[0028] Furthermore, the control device chamber can be easily designed, as the small door is not required. embodiment 3

[0029] The following describes a switchgear assembly according to embodiment 3 with reference to the drawings.

[0030] In embodiments 1 and 2, the example shown is that two vacuum circuit breakers are provided as the circuit breakers. However, more than two circuit breakers could be provided, or a single circuit breaker could be provided.

[0031] Fig. Figure 8 shows the structure of the switchgear 1, in which a circuit breaker 2a is provided and a circuit breaker chamber 20a is formed. The present embodiment naturally provides the same functions as embodiment 1. As shown in embodiment 2, the control device 510 could be provided directly on the door 9 of the housing 10, without the need for the small door 512a of the control device chamber 510a.

[0032] Although the disclosure above is described in the form of various exemplary embodiments and implementations, it is understood that various features, aspects and functionalities described in one or more of the individual embodiments are not limited in their applicability to the particular embodiment in which they are described, but instead can be applied alone or in various combinations to one or more of the embodiments of the disclosure.

[0033] It is therefore understood that numerous modifications, not shown as examples, can be devised without deviating from the scope of the present disclosure. For example, at least one of the component parts could be modified, added, or eliminated. At least one of the component parts mentioned in at least one of the preferred embodiments could be selected and combined with the component parts mentioned in another preferred embodiment. DESCRIPTION OF REFERENCE MARKS 1 Switchgear 2a, 2b circuit breaker Doors 9, 9a, 9b 10 cases 20a, 20b Circuit breaker chamber 30 cable chamber 40 busbar chamber 50a, 50b Tax Chamber 51 control cables 52 Connecting section 61a, 61b, 62a, 62b socket 510, 520, 530, 540 Control device 510a, 520a, 530b, 540b Control device chamber 511a, 521a, 531b, 541b Box body 512a, 522a, 532b, 542b small door

Claims

[1] Switchgear (1) with a housing (10) the interior of which is partitioned into compartments, wherein the switchgear (1) has a circuit breaker compartment (20a, 20b) which accommodates a circuit breaker (2a, 2b) and a control compartment (50a, 50b) which accommodates a control device (510, 520, 530, 540) for controlling an opening / closing of the circuit breaker (2a, 2b), wherein the control chamber (50a, 50b) is located in front of the circuit breaker chamber (20a, 20b), a control device chamber (510a, 520a, 530b, 540b) which accommodates the control device (510, 520, 530, 540) is provided on one side of a door (9, 9a, 9b) of the housing (10) in the control chamber (50a, 50b), the control device chamber (510a, 520a, 530b, 540b) has a small door (512a, 522a, 532b, 542b) and a box body (511a, 521a, 531b, 541b) which accommodates the control device (510, 520, 530, 540), and the small door (512a, 522a, 532b, 542b) is provided for the door (9, 9a, 9b) of the housing (10), and the box body (511a, 521a, 531b, 541b) is designed such that the control chamber (50a, 50b) is not exposed to the outside world when the small door (512a, 522a, 532b, 542b) is open. [2] Switchgear (1) according to claim 1, wherein the control device (510, 520, 530, 540) is attached to the small door (512a, 522a, 532b, 542b). [3] Switchgear (1) according to claim 1 or 2, wherein the box body (511a, 521a, 531b, 541b) is attachable and removable. [4] Switchgear (1) according to any one of claims 1 to 3, wherein a control cable (51) which is connected to the control device (510, 520, 530, 540) is led out of the box body (511a, 521a, 531b, 541b) via a connecting section (52), and the connecting section (52) has such a structure that closes a gap of an opening provided for the box body (511a, 521a, 531b, 541b) and through which the control cable (51) runs.

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