JPH0632723Y2 - Double bus type closed switchboard - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a dual structure in which power is supplied from either one of a dual bus bar drawn into a panel body, such as a regular or spare line. Bus-type closed switchboard.

[Conventional technology]

Conventionally, as this kind of closed switchboard, there is one shown in FIG.

That is, the circuit breaker chambers (3a) and (3b), in which the circuit breakers (2) are freely inserted and removed, are provided at the front parts of the two board bodies (1a) and (1b) that are installed opposite to each other. Bus bushings that are formed and connected to the bus bars (5a) and (5b) drawn into the bus room (4a) and (4b), respectively, above the rear walls of the circuit breaker rooms (3a) and (3b).
(6a) and (6b) are pierced, and at the lower part of the rear wall of each of the circuit breaker chambers (3a) and (3b), a pull-out cable (8) drawn into the cable chambers (7a) and (7b). Cable-side bushings (9a), (9b) connected to the are penetrated.

Therefore, by storing the circuit breaker (2) in either of the busbar chambers (3a), (3b), the contactors (2a), (2b) on the rear surface of the circuit breaker (2) respectively. , Busbar side bushings (6a), (6b) and cable side bushings (9a), (9b), and one of both busbars (5a), (5b) via the circuit breaker (2). Connected to the drawer cable (8).

However, in the above-mentioned case, since it is necessary to provide the two board bodies (1a) and (1b), it is expensive and has a drawback that a large installation area is required.

As another closed switchboard, there is one shown in FIG. 7, in which the contacts (2a), (2b) of the circuit breaker (2) are provided on the rear wall of the circuit breaker chamber (3) in the panel body (1). Busbar bushing (6) and cable side bushing (9), which both come into contact with and separate from each other, are inserted, and both busbars (5a) and (5b) drawn into the busbar room (4) are connected by interlocks. It is connected to the bus side bushing (6) via the switching switches (10a) and (10b), and the pull-out cable (8) drawn into the cable chamber (7) is connected to the cable side bushing.
It is connected to (9).

Then, by switching the switching switches (10a) and (10b), either one of the two bus bars (5a) and (5b) is connected to the extraction cable (8) via the breaker (2).

However, in this case, a large footprint is not required,
It is necessary to dispose the switching switches (10a), (10b), which are the exposed charging parts, in the bus room (4) of the panel body (1).
Both busbars (5a), (5b) because it is necessary to connect (5a), (5b) to the busbar bushing (6) via the switching switches (10a), (10b), respectively.
It becomes difficult to separate the spaces, and as a result, the bus room (4) becomes large in order to secure a predetermined air insulation dimension, which leads to an increase in the size of the board body (1), which makes it expensive. is there.

Further, as another example of this kind of closed switchboard, there is one shown in FIG. 8, in which the lead-out cable (8) of the cable chamber (7) is provided at the intermediate portion of the rear wall of the circuit breaker chamber (3) of the panel body (1). ) Connected to the cable bushing (9), the upper and lower parts of the rear wall, respectively, to the busbars (5a), (5b) drawn into both busbar chambers (4a), (4b). Busside bushings connected to each
(6a) and (6b) are pierced, and a circuit breaker (2) having an elevating mechanism is housed in the circuit breaker chamber (3).

Therefore, as shown by the solid line in the figure, when the body of the circuit breaker is lowered with respect to the carriage of the circuit breaker (2), both contacts (2a),
It becomes possible to connect b) to both bushings (9), (6b) and connect the bus bar (5b) to the pull-out cable (8). When is raised, both contacts (2a), (2b) come in contact with and separate from both bushings (6a), (9),
It is possible to connect (5a) to the extraction cable (8).

However, in the case of FIG. 8, although it is possible to downsize the panel body (1), a special circuit breaker (2) equipped with a lifting mechanism is required, and the standard product cannot be used, which is expensive. It has drawbacks.

[Problems to be solved by the invention]

The present invention has been made in view of the above points, and aims to provide a small and inexpensive double busbar closed switchboard by downsizing the panel body and simplifying the circuit breaker.

[Means for solving problems]

This invention is a double busbar type closed switchboard, which is housed in a circuit breaker chamber in the main body of the circuit board and has a contactor on the upper and lower parts of the rear surface, and both contactors on the rear wall of the circuit breaker chamber. Drawer-side connecting conductors provided on a horizontal plane passing through the center of the board and connected to lead-out conductors drawn into the board main body, and provided at positions above and below the connecting conductors of the rear wall, which are separated from each other by a certain dimension. No. 1, which is pulled into the board body
Circuit breaker-side disconnecting portions which are provided between the first and second busbar-side connecting conductors respectively connected to the second busbars and the circuit breaker and each of the connecting conductors, and which come into contact with and separate from the both contactors on the front surface. And a pull-out side disconnecting section connected to one of the breaker-side disconnecting sections and located on a horizontal plane passing through the center between the disconnecting-side sections on the rear surface and contacting and separating from the draw-out side connecting conductor, and the disconnecting section. A busbar switching adapter having a busbar-side disconnecting portion that is located apart from the fixed dimension and is connected to the other of the two circuit-breaker-side disconnecting portions and that is in contact with or separated from one of the two busbar-side connecting conductors. It will be.

[Action]

According to the present invention having the above-mentioned configuration, by connecting both breaker-side disconnection parts on the front surface of the adapter to both contactors of the breaker,
The pull-out side disconnecting part of the adapter can be connected to the pull-out side connecting conductor, and the bus bar side disconnecting part can be connected to one of the bus side connecting conductors.Turn the adapter upside down to connect both breaker side disconnecting parts to both breakers. If connected to the child, the pull-out side disconnecting portion can be connected to the pull-out side connecting conductor, and the bus-side disconnecting portion can be connected to the other bus-side connecting conductor, respectively.

〔Example〕

Next, the present invention will be described in detail with reference to FIGS. 1 to 5 showing one embodiment thereof.

In these drawings, (11) is the board body, (12) is the board body (1
Circuit breaker chamber formed in the first half of (1), (13) and (14),
Reference numeral (15) is a cable chamber and first and second busbar chambers respectively formed in the middle part and the upper and lower parts of the latter half of the board body (11).

(16) is a circuit breaker housed in the circuit breaker chamber (12) so as to be able to move forward and backward, and has three-phase contacts (16
a) and (16b) are projected. (17) is a lead-out cable that is drawn into the cable room (13) and serves as a lead-out conductor, and (18) and (19) are the three-phase third phases drawn into both bus-bar rooms (14) and (15), respectively.
The first and second busbars are supported by supporting insulators (20) and (21), respectively.

(22) is located on the horizontal plane passing through the center between both contacts (16a), (16b) of the circuit breaker (16), which is penetrated through the middle part of the rear wall (12) 'of the circuit breaker chamber (12). It is a bushing on the cable side and serves as a connection conductor on the extraction side.
It is connected to 7).

(23) and (24) are first and second busbar-side connecting conductors that are provided above and below the rear wall (12) 'and are located at a fixed distance l from the bushing (22). The first and second busbar-side bushings are connected to the first and second busbars (18) and (19) in the first and second busbar chambers (14) and (15), respectively.

(25) is a busbar switching adapter that is detachably interposed between the circuit breaker (16) and each of the bushings (22) to (24), and is configured as shown in FIGS. 3 and 4. The front surface of the insulating box body (26) is provided with recesses (27) and (28) into which the contacts (16a) and (16b) of the circuit breaker (16) are inserted, respectively. ), (28)
Circuit breaker-side disconnecting sections (29) and (30) for contacting and separating from the contacts (16a) and (16b), respectively, are arranged inside, and the cable-side bushing (22) is provided on the rear surface of the box (26). Cable side disconnection part (31) and busbar side bushing (23), (24) that connects and separates to either side of the busbar side disconnection part (32). ), (31) and both disconnecting sections (29), (32) are connected by conductors (33) and (34), respectively, and each conductor (3
3) and (34) are supported and fixed in the box (26) by insulating supports (35) and (36).

Here, as shown in FIG. 5, both disconnecting parts (29) and (30) on the front surface of the adapter (25) are connected to both contactors (16a) and (16b) of the circuit breaker (16).
With respect to the space dimension 2d, they are arranged vertically above and below the center of the box (26) by dimension d, and both disconnecting sections (29) and (30) contact the contactors (16a) and (16b), respectively. Is becoming detachable,
Further, the disconnecting section (31) on the rear surface of the adapter (25) is located on the horizontal plane passing through the center of the box body (26), that is, the center between the contacts (16a), (16b), and further, the disconnecting section (31). 32) is arranged at a position separated from the disconnecting section (31) by the constant dimension l.

When the power is taken from the first busbar (18), as shown in FIG. 1, the circuit breaker-side disconnecting parts (29), (30) of the adapter (25) are connected.
Contacts 16a, (16a) of the breaker (16)
cable side disconnection (31) and busbar side disconnection (32), respectively, while connecting the cable side bushing (22).
And the first busbar-side bushing (23).

When power is taken from the second busbar (19), pull out the breaker (16) shown in FIG. 1 to turn the adapter (25) upside down, and as shown in FIG. 2, shut off the adapter (25). Device side disconnector (2
9) and (30) are turned down and up, respectively, and the contactor (16
b) and (16a), the cable-side disconnecting portion (31) and the bus-side disconnecting portion (32) are connected to the cable-side bushing (22) and the second bus-side bushing (24), respectively.

The busbar switching adapter (25) is not limited to the above-mentioned configuration, and both front disconnecting sections (29), (30) and rear rear disconnecting sections (32), (3
It may be configured by an insulating molded product in which conductors (34) and (33) respectively connected to 1) are embedded.

Further, in the embodiment, the case of the lead-out cable is shown as the lead-out conductor, but other lead-out conductors such as duct type conductors may be used, and the connecting conductor is not limited to the bushing, and the bare conductor is supported by the insulator. Other configurations such as the one having the above configuration may be adopted.

[Effect of device]

As described above, according to the double bus bar type closed switchboard of the present invention, the bus bar switching adapter provided between the circuit breaker and each connecting conductor is only turned upside down, and the double bus bar is pulled into the main body of the board. The bus bar can be switched and connected to the lead conductor, there is no need to provide two board bodies as in the past, and there is no need to have a switching switch, and the board body can be made smaller,
Further, a special circuit breaker equipped with a lifting mechanism is not required, and the structure of the circuit breaker can be simplified and the cost can be reduced.

[Brief description of drawings]

1 to 5 show an embodiment of a double busbar type closed switchboard according to the present invention. FIGS. 1 and 2 are side views showing different connection states, and FIGS. 3 and 4 are adapters. FIG. 5 is a side view and a perspective view of a cutaway view of FIG. 5, FIG. 5 is a side view showing the dimensional relationship of each part, and FIGS. 6, 7, and 8 are side views of a conventional double bus bar type closed switchboard. (11) …… Board body, (12) …… Breaker room, (12) ′ …… Rear wall,
(16) …… Breaker, (16a), (16b) …… Contact, (17) …… Drawer cable, (18), (19) …… First and second busbars, (22) …… Cable Side bushing, (23), (24) …… First and second busbar side bushing, (25) …… Busbar switching adapter, (29), (30)…
… Breaker side disconnector, (31) …… Cable side disconnector, (32)…
… Disconnection on the bus side.

Claims (1)

[Scope of utility model registration request] 1. A rear surface of the circuit board housed in a circuit breaker chamber,
A circuit breaker having contacts at the bottom, and a drawer side connection connected to a lead conductor provided on a horizontal plane passing through the center between the contacts on the rear wall of the breaker chamber and drawn into the board body. A conductor, and first and second conductors provided at positions above and below the connection conductor of the rear wall, which are separated from each other by a certain dimension.
Circuit breaker-side disconnecting portions which are provided between the first and second busbar-side connecting conductors respectively connected to the second busbars and the circuit breaker and each of the connecting conductors, and which come into contact with and separate from the both contactors on the front surface. And a pull-out side disconnection section that is located on a horizontal plane passing through the center between the disconnection sections and is connected to one of the disconnection sections and that is in contact with and separated from the pull-out side connection conductor, and the constant from the disconnection section. A busbar switching adapter having a busbar-side disconnecting portion that is located at a distance from each other and that is connected to the other of the circuit breaker-side disconnecting portions and that is in contact with or separated from one of the busbar-side connecting conductors; Closed switchboard.