JPS6111044B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a segmental connection device used in a closed type switchgear.

Since the double-bus type sealed switchgear has a bus disconnect switch that quickly cuts off the bus loop current, regular maintenance and inspection of the contacts is required, so it is necessary to install only the bus disconnect switch. It is required that it be removable from the

To this end, conventionally, the busbar disconnectors installed on each double busbar are removably attached to the busbar, and the divisional connections that can be disconnected and reconnected to the front and disconnector sides of the busbar disconnectors, respectively, are provided. equipment,
When inspecting either one of the disconnectors, disconnect the sectional connection device installed on the disconnector side or on the disconnector side, remove the disconnector from the busbar, and inspect both disconnectors at the same time. When inspecting, each section connection device is disconnected, and both disconnectors are removed from the busbar.

However, in such a structure, since each bus disconnector is provided with a separate connection device, the structure of the connecting electric circuit becomes large, and the device cannot be sufficiently miniaturized, and the number of components increases, making it expensive. In addition, when inspecting both disconnectors, each connecting device must be disconnected and reconnected, which is time consuming and increases the number of man-hours.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a compact and easy-to-operate sectional connecting device that can disconnect and reconnect one or both of the connecting portions of both disconnectors using a single device.

An embodiment of the present invention will be described below with reference to FIGS. 1 to 4. FIG. 1 shows a double-bus closed type switchgear using the sectional connection device of the present invention. In the figure, 11A and 11B are bus bars, 12
Reference numerals A and 12B indicate an L-shaped connection type busbar disconnector, 16 a bridge disconnector, 17 and 18 a line disconnector and a cable head, and 101 a sectional connection device. The busbar disconnectors 11A and 11B each have one outlet portion removably connected to the busbars 11A and 11B, and the other outlet portions 13A and 13B are arranged opposite to each other on the axis, and are connected to the busbar disconnectors 11A and 13B. A dividing connecting device 101 is inserted between one end of the sealed conduit 21 extending from one outlet of the disconnector 16 and passing through the center on the axis of the two disconnector outlets and on an axis perpendicular to this axis. Connected.

FIG. 2 shows the section connection device in a fully assembled state. A conductor 15A drawn out from one electrode and supported by an insulating spacer 14A is provided at the lead-out portion 13A of the disconnector 12A. Similarly to the disconnector 11A, the disconnector 12B is provided with an opening 15B supported by an insulating spacer 14B at the opening 13B. The sealed conduit 21 has a conductor 23 supported by an insulating spacer 22 at its end, and the inner end of this conductor 23 is connected to a wire breaker 16 (see FIG. 1) via a connecting conductor 24.
It is connected to one outlet part 16A of the.

The divisional connecting device designated by the general reference numeral 101 has a T-shaped casing 102, and flanges 103A and 1 are formed on the left and right sides of the casing 102 in the figure.
One end of bellows 104A and 104B is fixed to 03B by screws, respectively, and bellows 104A
The opposite side of the casing is the outlet 1 of the disconnector 12A.
The bellow 1
The opposite side of the casing of 04B is also the bellows 104A mentioned above.
Similarly, it is removably fastened to the flange surface of an insulating spacer 14B that constitutes the opening portion 13B of the disconnector 12B. Also bellows 104A and 104B
The bellows has a stud (not shown) that expands and contracts in the axial direction when the disconnectors 12A and 12B are attached or detached, and by tightening this stud, the bellows and the disconnector are separated and the disconnectors are attached or detached. A connecting flange 103C that opens in a direction perpendicular to the axis of the T-shaped casing 102 in the direction of the disconnector is detachably connected to the end of the sealed conduit 21 drawn out from the disconnector 16 via an insulating spacer 22. . A hand hole 105 is provided on the opposite side of the casing 102 from which the sealed conduit is connected, and is normally closed with a cover 105A for attaching and detaching a connecting device 201, which will be described later. Overall code 2
01 is a connection device provided in the casing 102, and this connection device 201 is connected to the disconnectors 12A and 12B.
It consists of first and second connecting conductors 202A and 202B and a third connecting conductor 205, which removably connect the conductors 15A and 15B of the outlet part and the conductor 23 of the sealed conduit 21.

The first connecting conductor 202A has a flange portion 203A forming an abutting flat surface at one end, and a female contact 204A at the other end, and is connected to the opening portion 13A of the disconnector 12A via the contact 204A. It is slidably connected to the provided conductor 15A in the axial direction. The second connection conductor 202B is the first connection conductor 202A.
This contact 20 has the same structure as the one with a flange portion 203B formed at one end and a female contact 204B at the other end.
4B, it is slidably connected in the axial direction to a conductor 15B provided at the outlet 13 of the disconnector 12B. The third connecting conductor 205 is provided with a female contact 206 at one end in a direction perpendicular to the axes of the first and second connecting conductors 202A and 202B, and is connected to the end of the sealed conduit 21 via this contact 206. It is slidably connected to the provided conductor 23 in the axial direction. The connection conductor 202
A, abutting flat surface 207A on the opposite surface to 202B,
207B is formed, and a flange portion 203A of the first connection conductor 202A is formed on one flat surface 207A.
is butt-connected to the other flat surface 207B.
The flange portions 203B of the connecting conductors 202B are butt-connected and fixed together by screws 208, and a movable shield 209 is provided to improve the electric field distribution.

In the sectional connection device configured in this way, for example, one bus disconnector 12 is installed for inspection.
When removing only A, open the hand hole 105 of the casing 102, slide the shield 209, unfasten the bolt 208, and pull out the third connecting conductor 205 from the conductor 23 of the sealed conduit to remove it.

Next, the bellows 10 on the right side of the casing 102
4A and the opening part 13A of the disconnector 12A, the bellows 104A is compressed, and the bellows 104A and the disconnector 12A are separated to an appropriate gap S.

Next, the first connecting conductor 202A is moved to the left in the drawing by operation from the hand hole 105, and the conductor 202A is pulled out from the conductor 15A of the disconnector 12A, and its end is housed in the bellows 104A, and then disconnected. Remove the device 12A from the busbar 11A and inspect it. It will be readily understood that the reassembly of the disconnector 12A after inspection can be carried out in the reverse order of the above operations. In addition, when inspecting the disconnector 12A, if the other disconnector 12B is used to conduct electricity, remove the first connecting conductor 202A and connect the third connecting conductor 205 to the conductor 23 of the sealed conduit 21 again. , and the conductor 205 and the second connection conductor 202B are butt-connected and energized. In this case, the hand hole 105 is sealed and the bellows 104
Needless to say, A is covered with a cover 105B. When inspecting only the disconnector 12B, it is sufficient to perform the same procedure as when inspecting the disconnector 12A described above, and when inspecting both disconnectors 12A and 12B at the same time, remove one of the disconnectors in the above order. Afterwards, the other disconnector can be removed.

As explained above, according to the device of the present invention, the first and second conductors, which are removably provided in one casing with respect to both the disconnectors, are connected to the shear disconnector in a direction perpendicular to the axis between the conductors. A third removable
The third conductor is butt-connected to the conductor of the
Since one or both of the first and second conductors can be attached and detached using the space between the conductors, the structure can be made simple and compact. In addition, since it is possible to easily disconnect and reconnect both disconnectors and the disconnector side connection with one device, the switchgear is larger than the conventional one, which requires separate connection devices for each disconnector. This has the effect of eliminating the drawbacks of large size and reducing the size of the device.

[Brief explanation of drawings]

FIG. 1 is an overall view of a closed type switchgear using the connecting device for dividing according to the present invention, FIG. 2 is a vertical sectional view showing one embodiment of the connecting device for dividing according to the present invention, and FIGS. 3 and 4 are FIG. 3 is a cross-sectional view showing the procedure for attaching and detaching the detachable conductor of the device. 12A, 12B...Disconnector for busbar, 13A, 1
3B... Outlet part of bus disconnector, 21... Sealed conduit, 101... Connection device for division, 102...T
Shaped casing, 104A, 104B... bellows, 105... hand hole, 202A... first
connection conductor, 202B...second connection conductor, 20
5...Third connection conductor.

Claims (1)

[Claims] 1 Connect to the respective first and second busbars from the first outlet of the circuit breaker through the divisional connection device and through the first and second busbar disconnectors, and The connecting device connects to the cable head from the outlet, and the dividing connecting device connects the first and second connecting conductors in a straight line and detachably on both sides of the third connecting conductor within the T-shaped casing. and store the first and third parts connected in a straight line.
and the third connecting conductor and the first opening part of the circuit breaker are sealed and connected so as to be perpendicular to the second connecting conductor, and the first, third and This first and second of the second connecting conductor
The ends of the connection conductors are sealed and connected to the respective one-side outlets of the first and second bus disconnectors via bellows, and A connecting device for dividing a closed type switchgear, which has a hand hole located opposite to a third connecting conductor.