JPS6337562B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a double-bus closed switchboard.

FIG. 1 shows an example of the internal structure of a conventional closed switchboard of this type. Reference numeral 1 is a board box, with a first busbar chamber A and a second busbar chamber B into which the first busbar 2A and second busbar 2B are drawn, respectively, at the front and back of the upper part, and a drawer shape and a cut-out at the front and rear of the lower part, respectively. device 3 and load cable 4
Disconnector room C and cable room D
Rotary disconnectors 5 are installed on the front door 1a and rear door 1b between the two chambers C and D and the busbar chambers A and B, respectively.
Chambers E and F are provided to house the operating mechanism 6A of A and the operating mechanism 6B of the rotary disconnector 5B.
Reference numerals 7 and 7 denote pushings extending horizontally backward from the drawer shape and disconnector 3. 8A and 8B are socket bushings to which the first bus bar 2A and second bus bar 2B are connected, respectively; 9 is a disconnector socket bushing;
10 is a socket bushing that connects the drawer type disconnector 3 and the rotary type disconnector 5A, and 11 is a socket bushing that connects the load cable 4 and the drawer type disconnector 3.

In this way, in the conventional double-bus closed switchboard, the rotating disconnect switches 5A and 5B are used, so the panel box 1 becomes large and expensive, and the first bus room A,
By arranging the second busbar chambers B one after the other,
The operation part of one disconnector 5B is connected to the rear door 1 of the panel box 1.
Since it is located on the b side and is not on the same side as the drawer or disconnector 3, it is difficult to use a mechanical interlock mechanism, and an electrical interlock system is used, resulting in insufficient reliability and safety. , and disconnector 5
When inspecting disconnector B, disconnect switch 5A, drawer type and disconnector 3
Unable to check the status of disconnector 5, on the contrary,
A. There was an inconvenience in that the state of the disconnector 5B could not be checked from the drawer type or from the disconnector 3 side.

This invention was made in order to eliminate the drawbacks of the above-mentioned conventional one.
and a second disconnection section and a sheath disconnection section arranged above and below,
By inserting and removing the drawer-type trolley into and from the front chamber of the panel box, each busbar is connected to and disconnected from the first busbar, second busbar, and load cable by bushing, compared to the conventional method. Reduce installation area,
It is an object of the present invention to provide a double-bus closed switchboard that can be manufactured at low cost and has high reliability and safety.

An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 2, the panel box 1 is partitioned into a front chamber X and a rear chamber Y by an insulating partition wall 1c.
is further divided into three upper and lower stages, with the first busbar 2A in the first busbar chamber A in the upper row, the second busbar 2B in the second busbar chamber B in the middle row, and the load cable 4 in the load cable compartment D in the lower row. The heads are each retracted. A drawer-type device 12 is housed in the front chamber X.

The drawer-shaped appliance 12 will now be described with reference to FIG. 13 is an insulating container, for example, a gas-filled insulating container, and includes an upper chamber 1 in which the first disconnecting section 14 is housed.
3A, bushings 14a, 15a and 15a, which are divided into a middle chamber 13B containing the second disconnecting section 15 and a lower chamber 13c containing the bow section 16, and through which the fixed contacts 17 pass in the same direction from each chamber. 1
6a extends horizontally backward. First disconnection section 14
and the second disconnection section 15 are connected in series by a connecting conductor 18 on the movable contact side (not shown), and the connecting conductor 18 and the fixed contact 17 of the shingle section 16 are They are connected via 16 movable contacts (not shown). Insulating container 13
1 is a pull-out type truck 1 having an L-shaped box structure when viewed from the side.
9, the operation part 14b of the first disconnection part 14 and the first The operation section 15b of the 2-disconnection section 15 is
It is stored above and below. The operating portion 16b of the sheath section 16 is housed within the cart portion 19b of the pull-out cart 19. Bushings 14a, 15 of the first disconnection section 14, the second disconnection section 15 and the shingle section 16
a, 16a, the tube type joint portion 17a of each fixed contact 17 is connected to the drawer type trolley 1.
The height is such that it can be connected to and separated from the joint portions of the socket bushings 8A, 8B, and 11 by inserting and pulling out the sockets 9 into the front chamber X. Upper chamber 1 of insulating partition wall 1c
Holes (not shown) are formed in the middle chamber 13B and lower chamber 13C to allow insertion and removal of the bushings of the first disconnection section 14, the second disconnection section 15, and the bottom section 16, respectively. There is. 14c, and 16
C is a mechanical interlock mechanism housed in the pull-out trolley 19 and functions as described below.

(a) The interlock mechanism 14c
is released when the first disconnection section 14 is open.
The operating section 14b of the controller is made operable.

(b) The interlock mechanism 16c
is released when the second disconnection section 1 is open.
The operation section 15b of No. 5 is made operable. The electrical connection of the drawer-type device 12 is shown in FIG. In addition, the second
The chain line in the figure indicates the size of the board box 1 shown in FIG.

In the above embodiment, a case of a double busbar type has been described, but it can also be applied to a case of a spare busbar type to obtain exactly the same operation and effect.

As described above, according to the present invention, by horizontally moving the drawer-type device, the first disconnection section and the second Since the disconnecting section can be inserted and removed, and both disconnecting sections do not have to be configured as rotary types, the height and depth of the panel box can be significantly reduced compared to conventional ones, which reduces manufacturing costs. In addition to being inexpensive and requiring a small installation area, the sheath section and disconnect section are assembled on the same pull-out trolley, so the interlock between these operating sections can be mechanically established. Compared to the conventional method, reliability and safety can be improved, and maintenance work can be made easier.

[Brief explanation of the drawing]

FIG. 1 is a side sectional view of a conventional double bus closed switchboard, FIG. 2 is a side sectional view of an embodiment of the double bus closed switchboard according to the present invention, and FIGS. 3 and 4 are respectively FIG. 2 is a configuration diagram and an electrical wiring diagram of a specific example of the drawer-type device in the above embodiment. In the figure, 1...board box, 2A...first bus bar,
2B...Second bus bar, 4...Load cable, 8A,
8B, 11...Socket bushing, 12...Drawer type equipment, 14...First disconnecting section, 15...Second
Disconnection section, 16... Shiya disconnection section, 14a, 15a,
16a...Butsing, 14b, 15b, 16b
...Operation unit, 14c, 16c...Mechanical interlock mechanism, 17...Fixed contact, 18...
Connection conductor, 19... Drawer type truck, 19a... Vertical part, 19b... Truck part, A... First busbar chamber, B...
...Second bus bar chamber, D...Load cable, X...Front chamber, Y...Rear chamber. In the drawings, the same reference numerals indicate the same or equivalent parts.

Claims (1)

[Claims] 1. In a double bus type closed switchboard, the panel is divided into front and rear chambers, drawer-type equipment is stored in the front chamber so that it can be pulled out forward, and the rear chamber is divided into a first bus chamber in the upper stage, a second bus chamber in the middle stage, A cable room is divided into three compartments in the lower tier, and a first disconnection section is housed in which the drawer-type equipment is connected via a joint to the socket butting of the first bus bar drawn into the first bus bar chamber. , an upper chamber in which a horizontal bushing through which a fixed contact having the joint at the tip of the disconnection section protrudes rearward; and a socket bushing of the second busbar drawn into the second busbar chamber; A lateral bushing that houses a second disconnecting section connected via a joint and through which a fixed contact having the joint at the tip of the disconnecting section protrudes rearward and is drawn into the middle chamber and the cable chamber. A lateral bushing is provided that protrudes rearward, and houses a shear section connected to the socket bushing of the load cable via a joint, and is penetrated by a fixed contact having the joint of the sheath section at its tip. A double-walled insulating container having a lower chamber, and a drawer-type trolley that stands upright at the rear of the insulating container and houses the first and second disconnection sections and the operation section of the bottom disconnection section. Busbar type closed switchboard.