JP2853584B2 - Metal closed switchgear - Google Patents

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 FIGS. 2A and 2B show an example of a conventional metal-closed switchgear. FIG. 2A is a side view of a drawer-type electric device in a housed state, and FIG. FIG. In the figure, a door 2 is attached by a hinge 3a to an upper portion on the front side of a box 1 having an open front. The door 2 is formed so as to be opened to the inside of the box 1 and to close the front surface of the box 1 at the position where the drawer-type electric device 4 has been pulled out. A movable contact portion 4a is attached to the back side of the drawer-type electric device 4, and the drawer-type electric device 4
The main circuit charging section 6 in the box 1 is stored or pulled out.
Approaching and leaving.

A door drop prevention device 5 is attached to an upper part of the drawer type electric device 4. The door drop prevention device 5 comes into contact with the door 2 to open the door 2 when the drawer-type electric device 4 is housed in the box 1, and opens the door 1 of the drawer-type electric device 4.
It is formed so as to be in contact with the door 2 and to support the door 2 when it is stored inside and when it is pulled out from the box 1. The drawer extension rail 10 connects the drawer-type electric device 4 to the box 1
It is used when storing or drawing out inside
Usually stored in another place.

Next, the operation of the above-mentioned conventional metal-closed switchgear will be described. Drawing-out type electric device 4 shown in FIG.
In the stored state, the movable contact section 4a contacts the main circuit charging section 6, and the main circuit is in a closed state. Further, the door 2 is opened and is in a horizontal state at the upper part of the box 1, and the door drop prevention device 5 is provided.
Abuts on the door 2 to support the door 2 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 1 and the drawer-type electric device 4 is pulled out of the box 1, the movable contact portion 4a is separated from the main circuit charging section 6, and the main circuit is opened. At this time, the door 2 is rotated clockwise around the hinge 3a by its own weight while being in contact with the door drop prevention device 5 as the drawer-type electric device 4 is pulled out, and is gradually closed. When the drawer-type electric device 4 is completely drawn out of the box 1, the door 2 is in a vertical state, and the front surface of the box 1 is closed.

The closing operation of the main circuit is the reverse of the opening operation. That is, the drawer-type electric device 4 is connected to the door 2
When the door 2 is moved forward in the direction, the door drop prevention device 5 comes into contact with the door 2, and the door 2 rotates counterclockwise about the hinge 3 a and is opened to the inside of the box 1. When the drawer-type electric device 4 is further advanced, the movable contact portion 4 a is held in contact with the main circuit charging portion 6, and the door 2 is supported by the door drop prevention device 5 at the upper part of the box 1. The drawer extension rail 10 moves the drawer-type electric device 4 to a storage place after storing the drawer-type electric device 4 in the box 1.

[0006]

In the above-described 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. Need to be larger, drawer type electrical equipment 4
A large operating force is required when storing or pulling out the camera. In addition, since the door 2 is opened to the inside of the box 1, it is necessary to secure an insulation distance so as not to approach the main circuit charging portion, and the depth of the box 1 becomes large.

Further, the drawer extension rail 10 for pulling out the drawer-type electric equipment 4 is used only for maintenance and inspection work of the drawer-type electric equipment 4, so that a separate storage space is usually required. Therefore, the present invention reduces the operating force at the time of storing or drawing out the drawer-type electric device, reduces the depth dimension of the box, and eliminates the need to move the drawer extension rail from another place for installation. The purpose is to do.

[0008]

In the upper part on the front side of a box body having an open front surface, when the drawer complete position of the drawer type electric device opened to the inside of the box body and housed in the box body, the box is closed. Attach an upper door that closes the upper half of the front of the body. At the top of the drawer-type electric device, when the drawer-type electric device is housed in the box, it comes into contact with the upper door to open the upper door, and contacts the upper door to support the door. Attach the door fall prevention device. Also, at the lower part on the front side of the box,
A lower door which can be opened to the outside of the box and closes a lower half of the box is attached. A drawer extension rail for storing or drawing the drawer-type electric device is attached to the box side of the lower door. When the drawer-type electric device is carried out of the box, the front surface of the box is closed by the upper door and the lower door.

[0009]

In the above metal-closed switchgear of the present invention, only the upper door closing 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 can be reduced. it can. Further, when the drawer-type electric device is stored or pulled out, only the upper door is brought into contact with the drawer-type electric device and is opened / closed, so that the operating force at the time of storage or drawer can be reduced. Further, since the drawer extension rail is installed on the lower door on the front side of the box, the drawer-type electric device can be easily drawn.

[0010]

1 shows an embodiment of a metal-closed switchgear according to the present invention, in which (A) is a side view of a retracted state of a drawer-type electric device, and (B) is a drawer state of the drawer-type electric device. (C) is a side view of the drawer-type electric device in a carry-out state. In the figure, an upper door 12 is attached to an upper portion on the front side of a box body 11 having an open front by a hinge 3a. The upper door 12 is formed so as to open to the inside of the box 11 and close the upper half of the front surface of the box 11 at the position where the drawer-type electric device 4 has been pulled out.

A door drop prevention device 5 is attached to the upper part of the drawer type electric device 4. When the drawer-type electric device 4 is housed in the box 11, the door drop prevention device 5 is used for the upper door 12.
, The upper door 12 is opened, and when the drawer-type electric device 4 is stored in the box 11 and when the drawer is pulled out from the box 11, the upper door 12 is supported. It is formed so that. A lower door 16 is attached to a lower portion on 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 11. By operating the handle 17, the lower door 16 rotates about the hinge 3 b and opens and closes to the outside of the box 11. further,
A drawer extension rail 20 is attached to the inside of the box 11 of the lower door 16, and when the lower door 16 is opened, the drawer extension rail 2
0 is formed at a position where the drawer-type 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 a closed state. Further, the upper door 12 is opened and is horizontal at the upper part of the box body 11, and is supported so that the upper door 12 does not fall when the door fall prevention device 5 abuts on the upper door 12. Further, the lower door 16 stands upright, and the lower half of the front surface of the box body 11 is closed.

In order 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 about the hinge 3b, and
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. Thereby, when the drawer-type electric device 4 is pulled out from the box 11, the movable contact portion 1a is separated from the main circuit charging portion 6, and
The main circuit is opened. At this time, the upper door 12 is rotated clockwise around the hinge 3a by its own weight with the upper door 12 being in contact with the door drop prevention device 5 with the drawer-type electric device 4 being pulled out.
Closed gradually. When the drawer-type electric device 4 is completely drawn out of the box 11, the upper door 12 is in a vertical state, and the upper half of the front of the box 11 is closed. When the handle 17 is operated in the unloaded state in which the drawer-type electric device 4 is moved from above the drawer extension rail 20, the lower door 16 moves the hinge 3.
It rotates clockwise around b, and the lower half of the front surface of the box 11 is closed. As a result, the front surface of the box 11 is closed by the upper door 12 and the lower door 16, so that 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 lower door 16 is opened by operating the handle 17, the drawer-type electric device 4 is placed on the drawer extension rail 20, and the drawer-type electric device 4 is advanced in the direction of the upper door 12, the door drop prevention device 5 is moved to the upper door 12. Upon contact, the upper door 12 rotates counterclockwise about the hinge 3 a and is opened to the inside of the box 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 drop prevention device 5 above the box body 11. Thereafter, the handle 17 is operated to raise the lower door 16 vertically, and the lower half of the front surface of the box 11 is closed.

[0015]

According to the present invention, as apparent from the above description, only the upper door closing 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 pulled out, only the upper door is brought into contact with the drawer-type electric device and is opened / closed, so that the operating force at the time of storage or drawer can be reduced. Further, the drawer extension rail is installed on the lower door on the front side of the box, so that the drawer-type electric device can be easily drawn.

[Brief description of the drawings]

1A and 1B show an embodiment of the present invention, wherein FIG. 1A is a side view of a drawer-type electric device in a housed state, FIG. 1B is a side view of a drawer-type electric device in a drawer state, and FIG. It is a side view in the state where electric equipment is carried out.

FIGS. 2A and 2B show a conventional example, wherein FIG. 2A is a side view of a drawer-type electric device in a housed state, and FIG.

[Explanation of symbols]

 Reference Signs List 4 drawer type electric equipment 5 door drop prevention device 11 box body 12 upper door 16 lower door 20 drawer extension rail

Claims (1)

(57) [Claims] At the drawer-completed position of a drawer-type electric device which is open to the inside of the box and is housed in the box, the front of the box has an open front. An upper door that closes an upper half is attached, and when the drawer-type electric device is stored in the box body, the upper door is brought into contact with the upper door to open the upper door, and the drawer is opened. At the time of the state where the electric appliance is stored in the box body and during the draw-out operation, a door fall prevention device which abuts on the upper door and supports the upper door is attached. A lower door that can be opened to the side and closes a lower half of the box body, and a drawer extension rail for storing or drawing out the drawer-type electric device is mounted on the box side of the lower door. When the drawer-type electric device is unloaded from the box, A metal-closed switchgear, wherein a front surface of the box body is closed by an upper door and the lower door.