JPS6219045Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a disconnecting section that connects a conductor in a closed switchboard and an electrical device such as a circuit breaker.

[Technical background of the invention and its problems]

Conventionally, in the F2 type and G type two-tier closed switchboard of Japan Electrical Manufacturers Association standard JEM1153 closed switchboard, the first
As shown in the figure, the box body 1 is divided into a control room A, an equipment room B, a busbar room C, and a cable room D by partition covers 2a to 2e, disconnection section mounting plates 3a and 3b, and a floor plate 4. A horizontal busbar 5 is provided in the busbar chamber C, and is connected to upper and lower disconnection sections 7 through branch conductors 6 and 6'. FIG. 2 is a detailed cross-sectional view of the disconnecting section 7, in which the contact 19 is integrally molded with the insulating section 20, and the contactor 19 is integrally formed with the insulating section 20.
It is attached to the disconnection section mounting plates 3a and 3b from the side,
Branch conductors 6, 6' are connected to the rear end of the contactor 19. With this configuration, the connection between the contactor 19 and the bus branch conductors 6, 6' can be inspected simply by removing the partition cover 2b (FIG. 3).

Also, in the four-tier closed switchboard shown in FIG. 4, the box body 1' has partition covers 8a to 8d and a current transformer mounting plate 9a.
Control line room with ~9c and disconnection part mounting plates 10a~10d
It is divided into A', equipment room B', busbar room C', and cable room D'. A horizontal busbar 11 is provided at the bottom of the busbar chamber C', and is connected to a disconnection section 13 at the bottom of each stage via a vertical busbar 12. Also, conductors 14a to 14 connected to the disconnection section 13' at the top of each stage.
c crosses between the phases of the vertical busbar 12 and exits through the insulating support 16 into the cable room D'.

However, in this structure, the vertical busbar 12 and the disconnection section 1
3 connection and disconnection parts 13' and conductors 14a to 1
Since the connection section 4c is located inside the busbar chamber C' as in FIG. 1, it is necessary to remove the disconnection section mounting plates 10a to 10d or the current transformer mounting plates 9a to 9c during inspection. However, the disconnection part mounting plate 10a~
10d, it is necessary to remove the connections between the disconnecting sections 13 and 13', the vertical bus bar 12, and the connecting conductors 14a to 14c, which cannot be done from the circuit breaker chamber B'. Furthermore, to remove the current transformer mounting plates 9a to 9c,
It is necessary to remove the conductors 14a to 14c, which takes time, so in the current situation, there are restrictions on on-site inspection time.
It is difficult to put the JEM1153 F2 and G type four-tier closed switchboard into practical use.

[Purpose of invention]

The object of the present invention is to provide a disconnecting section for a closed switchboard that can be easily inspected in a short period of time.

[Example of idea]

Hereinafter, the present invention will be explained using an illustrative embodiment.

FIG. 5 is a detailed view of the busbar chamber C' of FIG. 4, showing the T-phase vertical busbar 12, the third conductor 14a from the bottom, and the T-phase horizontal busbar 11.

Figure 6 is a cross-section of Figure 5, showing the vertical generatrix 12.
is connected to the contact conductor 21 on the equipment room B' side at the disconnection section 13, and the conductor 14a and the disconnection section 1 are connected to each other.
The same applies to the connection section 3'.

FIG. 7 is a detailed cross-sectional view of the disconnection section 13.
3, there is a horizontally long rectangular hole 15a in the center of the insulator 15 which has annular protrusions on the front and rear, and a boss 22 with a female thread is embedded under this hole 15a, and a boss 22 with a female thread is embedded behind the contact conductor 21. The ends are fixed. When assembling, first install the insulator 15 from the equipment room B' side,
Next, branch conductor 12A and conductor 14a of vertical bus bar 12
Penetrate the front end of the hole 15a from the busbar chamber C' side into the hole 15a,
Screw it onto the contact conductor 21 from the front (equipment room B').

As a result, the disconnection parts 13, 13' and the vertical busbar 1
2. The connection part with the main circuit conductor 14a is located at the front (equipment room
B′), making it easier to retighten this part.

If the vertical busbar 12 and the conductors 14a to 14c are completely insulated, there is no need to look inside the busbar chamber C' during periodic inspection.

Only the connection between the horizontal busbar 11 and the vertical busbar 12 remains in this busbar chamber C', but this part can be easily inspected and retightened by removing the covers 8a and 8b.

In the above description, the insulator 15 is shaped like a rectangular plate, but it may also be shaped like a disk, and the annular protrusions may also be concentric circles. In this case, there is an advantage that the mold can be manufactured easily.

[Effect of idea]

In this way, the disconnecting section of the closed switchboard according to the present invention has a connecting section for the branch conductor and the conductor to the cable etc. on the front circuit breaker room side, so that the closed switchboard is compact and easy to maintain and inspect. be able to.

[Brief explanation of the drawing]

Fig. 1 is a side view of a conventional two-stage high-pressure closed panel, Fig. 2 is a detailed partial sectional view of Fig. 1, Fig. 3 is an explanatory diagram showing the operation of Fig. 1, and Fig. 4 is a conventional A side view of a stacked high-voltage closed switchboard, FIG. 5 is a detailed perspective view of the busbar chamber of a closed switchboard using the disconnection section of the present invention, FIG. 6 is a detailed cross-sectional view of the same as in FIG. 5, and FIG. FIG. 2 is a detailed cross-sectional view showing an embodiment of a disconnection section of a closed switchboard. 10a to 10d... Disconnection section mounting plate, 12... Vertical bus bar, 12A... Branch conductor, 13, 13'...
Disconnection section, 14a to 14c... Connection conductor, 15...
Insulator, 15a...hole, C'...busbar chamber.

Claims (1)

[Claim for Utility Model Registration] A circuit breaker chamber in which circuit breakers are housed in multiple stages above and below in front of a partition wall that partitions the inside of the box body into front and back, and a busbar provided at the rear of the partition wall and whose rear end is connected to the outside of the box body. In a closed switchboard comprising a busbar chamber in which a vertical bus bar is installed, the front end of a branch conductor branching forward passes through the partition wall and connects to the circuit breaker, the partition wall at the rear end of the circuit breaker chamber mounted vertically,
an insulator provided with a rectangular hole in the center through which the front end of the branch conductor passes; a rear end surface is attached to the front surface of the insulator, and the front end is provided horizontally in front of the rectangular hole, and the front part is connected to the circuit breaker. a contact conductor that connects and separates from the branch conductor and whose rear end is connected to the front end of the branch conductor;