JPH0898340A - Metal enclosed switchgear - Google Patents

Abstract

PURPOSE: To eliminate the necessity of installation of an drawing extension rail which is to be transferred from the other place when a drawer type electric apparatus is drawn out and, further, reduce the depth direction dimension of a cabinet. CONSTITUTION: An upper door 12 which is opened toward the inside of a cabinet 11 and encloses the upper half of the front surface of the cabinet 11 whose front surface can be opened is attached to the upper part of the front surface of the cabinet 11. A door falling preventing appliance 5 which is released when a drawer type electric apparatus 4 is housed in the cabinet 11 and, when the apparatus is drawn out, is pressed against the upper door 12 and supports the upper door 12 is attached to the upper part of the drawer type electric apparatus 4. A lower door 16 which can be opened toward the outside of the cabinet 11 and, further, encloses the lower half of the cabinet 11 is attached to the lower part of the front surface of the cabinet 11. A drawing extension rail 20 for housing or drawing out the drawer type electric apparatus 4 is attached to the cabinet 11 side of the lower door 16. When the drawer type electric apparatus 4 is carried out from the cabinet 11, the front part of the cabinet 11 is enclosed by the upper door 12 and the lower door 16.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a metal closed switchgear installed in a substation.

[0002]

2. Description of the Related Art FIG. 2 shows an example of a conventional metal-closed switchgear, in which (A) is a side view of a drawer type electric device in a housed state, and (B) is a side view of the drawer type electric device in a drawn state. It is a figure. In the figure, a door 2 is attached by a hinge 3a to the upper portion of the front side of the box body 1 whose front surface is open. Further, the door 2 is formed so as to be opened to the inside of the box body 1 and close the front surface of the box body 1 at the drawing completion position of the drawer type electric device 4. A movable contact portion 4a is attached to the back side of the drawer-type electric device 4, and
Main circuit charging part 6 inside the box 1 when storing or pulling out
Approach or leave.

A door fall prevention device 5 is attached to the upper portion of the drawer type electric device 4. The door fall prevention device 5 contacts the door 2 to open the door 2 when the drawer type electric device 4 is stored in the box body 1, and the box body 1 of the drawer type electric device 4 is opened.
It is formed so as to abut against the door 2 and support the door 2 when it is housed inside and when it is pulled out from the inside of the box 1. The drawer extension rail 10 holds the drawer type electric device 4 in the box body 1
It is used when storing or withdrawing inside.
Normally, it is stored in another place.

Next, the operation of the above-mentioned conventional metal-closed switchgear will be described. Drawer type electric device 4 shown in FIG.
In the stored state, the movable contact portion 4a contacts the main circuit charging portion 6 and the main circuit is in the closed state. Further, the door 2 is opened and is in a horizontal state above the box body 1, and the door fall prevention device 5
By contacting the door 2, the door 2 is supported so as not to fall. To open the main circuit in this state,
When the drawer extension rail 10 is installed on the front side of the box body 1 and the drawer type electric device 4 is pulled out from the box body 1, the movable contact portion 4a is detached from the main circuit charging portion 6, and the main circuit is opened. At this time, as the drawer type electric device 4 is pulled out, the door 2 is rotated clockwise around the hinge 3a by its own weight while being in contact with the door fall prevention device 5, and is gradually closed. When the drawer-type electric device 4 is completely pulled out of the box body 1, the door 2 is in the vertical state and the front surface of the box body 1 is closed.

The circuit closing operation of the main circuit is the reverse operation of the circuit opening operation. That is, the drawer type electric device 4 is attached to the door 2
When it is moved forward in the direction, the door fall prevention device 5 comes into contact with the door 2, the door 2 rotates counterclockwise around the hinge 3a, and is opened to the inside of the box body 1. When the drawer-type electric device 4 is further advanced, the movable contact portion 4a is held in contact with the main circuit charging portion 6, and the door 2 is supported by the door fall prevention device 5 on the top of the box 1. The drawer extension rail 10 moves the drawer type electric device 4 to the storage location after the drawer type electric device 4 is housed in the box body 1.

[0006]

In the above-mentioned conventional metal-closed switchgear, the door 2 closes the front surface of the box 1 when the drawer-type electric device 4 is pulled out, so that the door 2 is pulled out. Need to be larger, drawer type electrical equipment 4
A large operating force is required when storing or withdrawing. Further, since the door 2 is opened to the inside of the box body 1, it is necessary to secure an insulation distance so as not to approach the main circuit charging part, and the depth dimension of the box body 1 becomes large.

Furthermore, since the drawer extension rail 10 for drawing out the drawer type electric device 4 is used only for maintenance and inspection work of the drawer type electric device 4, another storage place is usually required. Therefore, the present invention reduces the operation force when storing or pulling out the drawer type electric device, reduces the depth dimension of the box body, and eliminates the need to move and install the drawer extension rail from another place. The purpose is to do.

[0008]

[Means for Solving the Problems] At the upper end of the front side of a box body having an opening on the front side, at the drawer completion position of a drawer type electric device which is open to the inside of the box body and is housed in the box body, Install an upper door that closes the upper half of the front of the body. On the upper part of the drawer type electric device, when the drawer type electric device is housed in the box, the upper door is abutted to open the upper door, and the upper door is abutted to support the door. Install the door fall prevention device. Also, in the lower part of the front side of the box,
A lower door that can be opened to the outside of the box and closes the lower half of the box is attached. An extension rail for accommodating or withdrawing the drawer type electric device is attached to the box side of the lower door. When the drawer-type electric device is carried out from the box body, the front surface of the box body is closed by the upper door and the lower door.

[0009]

In the metal-closed switchgear of the present invention described above, since only the upper door that closes the upper half of the front surface of the box body is opened to the inside of the box body, the depth dimension of the box body can be reduced. it can. Further, when the drawer-type electric device is stored or drawn out, only the upper door is brought into contact with the drawer-type electric device to be opened and closed, so that the operation force during the storage or the drawing-out can be reduced. Further, since the drawer extension rail is installed on the lower door on the front side of the box body, the drawer type electric device can be easily drawn out.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an embodiment of a metal switchgear according to the present invention. (A) is a side view of a drawer type electric device in a housed state, (B) is a drawer state of the drawer type electric device. 2C is a side view of the drawer type electric device in a carried-out state. In the figure, an upper door 12 is attached by a hinge 3a to the upper part of the front side of the box body 11 whose front surface is open. The upper door 12 is formed so as to be opened to the inside of the box body 11 and close the upper half of the front surface of the box body 11 at the drawing completion position of the drawer type electric device 4.

A door fall prevention device 5 is attached to the upper portion of the drawer type electric device 4. This door fall prevention device 5 is provided with an upper door 12 when the drawer type electric device 4 is stored in the box body 11.
To open the upper door 12 and to support the upper door 12 by abutting the upper door 12 when the drawer type electric device 4 is stored in the box 11 and when the drawer type electric device 4 is pulled out from the box 11. Is formed. A lower door 16 is attached to the lower portion of the front side of the box body 11 by a hinge 3b. Also, the lower door 16
A handle 17 is attached to the upper part of the box, and when the handle 17 is operated, the lower door 16 rotates around the hinge 3b and is opened / closed on the outside of the box 11. further,
A drawer extension rail 20 is attached to the inside of the box body 11 of the lower door 16, and when the lower door 16 is opened, the drawer extension rail 2
0 is formed so that the pull-out electric device 4 can be pulled out.

Next, the operation of the metal-closed switchgear of the present invention will be described. In the housed state of the drawer-type electric device 4 shown in FIG. 1A, the movable contact portion 1a contacts the main circuit charging portion 6, and the main circuit is in the closed state. In addition, the upper door 12 is opened and is in a horizontal state above the box body 11. When the door fall prevention device 5 contacts the upper door 12, the upper door 12 is supported so as not to fall. Further, the lower door 16 stands vertically, and the lower front half of the box body 11 is closed.

To open the main circuit in this state,
When the lower door 16 is opened by the handle 17, the lower door 16 rotates counterclockwise around the hinge 3b, and the box 1
1 is open to the outside. When the lower door 16 is opened, the drawer extension rail 20 is in a position where the drawer type electric device 4 can be drawn out. As a result, when the drawer-type electric device 4 is pulled out from the box body 11, the movable contact portion 1a is separated from the main circuit charging portion 6,
The main circuit is opened. At this time, the upper door 12 rotates clockwise around the hinge 3a by its own weight while the upper door 12 is in contact with the door fall prevention device 5 as the drawer type electric device 4 is pulled out.
It will be gradually closed. Then, when the drawer-type electric device 4 is completely pulled out of the box body 11, the upper door 12 is in the vertical state, and the upper half of the front surface of the box body 11 is closed. When the handle 17 is operated in the carry-out state in which the drawer type electric device 4 is moved from the drawer extension rail 20, the lower door 16 is hinged 3.
By rotating clockwise around b, the lower front half of the box 11 is closed. As a result, since the front surface of the box body 11 is closed by the upper door 12 and the lower door 16, the main circuit charging section 6 is not exposed.

Next, the closing operation of the main circuit is the reverse of the opening operation. That is, when the handle 17 is operated to open the lower door 16 and the drawer type electric device 4 is placed on the drawer extension rail 20 and is advanced in the direction of the upper door 12, the door fall prevention device 5 moves to the upper door 12. Upon contact, the upper door 12 rotates counterclockwise around the hinge 3a and is opened to the inside of the box body 11. When the drawer-type electric device is further advanced, the movable contact portion 1a is held in contact with the main circuit charging portion 6, and the upper door 12 is supported by the door fall prevention device 5 on the top of the box 11. Thereafter, the handle 17 is operated to vertically raise the lower door 16 to close the lower half of the front surface of the box 11.

[0015]

As apparent from the above description, according to the present invention, only the upper door that closes the upper half of the front surface of the box is opened to the inside of the box, so that the depth of the box is reduced. can do. Further, when the drawer-type electric device is stored or drawn out, only the upper door is brought into contact with the drawer-type electric device to be opened and closed, so that the operation force during the storage or the drawing-out can be reduced. Furthermore, the drawer extension rail is installed on the lower door on the front side of the box body, so that the drawer-type electric device can be easily pulled out.

[Brief description of drawings]

1 shows an embodiment of the present invention, (A) is a side view of a drawer type electric device in a stored state, (B) is a side view of a drawer type electric device in a drawn state, and (C) is a drawer type. It is a side view of the carrying out state of an electric equipment.

FIG. 2 shows a conventional example, FIG. 2A is a side view of a drawer type electric device in a housed state, and FIG. 2B is a side view of the drawer type electric device in a drawn state.

[Explanation of symbols]

 4 Drawer type electric equipment 5 Door fall prevention device 11 Box 12 Upper door 16 Lower door 20 Drawer extension rail

Claims (1)

[Claims] 1. At the drawer completion position of a drawer-type electric device which is opened to the inside of the box body and is housed in the box body, in the upper part of the front side of the box body having an open front surface. An upper door that closes the upper half is attached, and when the drawer-type electric device is housed in the box, the upper door is abutted to open the upper door and the drawer is closed. -Type electric device is installed in the box and when it is pulled out, a door fall prevention device that abuts against the upper door and supports the upper door is attached, and the outside of the box is attached to the lower part on the front side of the box. A lower door that is openable to the side and that closes the lower half of the box body, and a drawer extension rail for housing or withdrawing the drawer type electric device is attached to the box body side of the lower door, When the drawer type electric device is carried out from the box, A metal closed switchgear in which the front surface of the box body is closed by an upper door and the lower door.