JPH0711813U - Metal closed switchgear - Google Patents

Abstract

(57) [Summary] [Purpose] The operation or disconnection state of the drawer switch can be easily confirmed from the outside, and the current transformer and zero-phase current transformer can be easily inspected and replaced. Aim to reduce the opening and closing space of the door. [Structure] A storage frame 5 having fixed contact portions 4a and 4b mounted therein is fixed inside a box body 20 having a front opening. Disconnection type contact portion 11a which comes in contact with and separates from the fixed contact portions 4a and 4b.
And 11b, and the current transformer 2 is connected to the disconnecting contact portion 11a.
3, the zero-phase current transformer 24 is mounted on the disconnect type contact portion 11b, and the monitoring device 7 such as an operation switch, a measuring device, and a protective device, and a test terminal 8 for testing the monitoring device 7 are provided. A drawer type switch 22 such as a circuit breaker mounted on the front side is provided. This drawer type switch 22 is a storage frame 5
It is formed so that the front surface of the box body 20 is closed when the box body 20 is stored in the.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a metal closed switchgear installed in a substation.

[0002]

[Prior art]

 2A and 2B show an example of a conventional metal-closed switchgear, in which FIG. 2A is a front view and FIG. 2B is a side view. In the figure, a door 9 is attached by a hinge 11 to the side surface on the front surface side of the box body 10 whose front surface is open. The handle 6 is attached to the door 9, and the door 9 is opened and closed by operating the handle 6. The storage frame 5 is fixed in the box 10. Fixed contact portions 4a and 4b are attached to the storage frame 5. The current transformer 13 is connected to the fixed contact portion 4a by the main circuit conductor 15a, and the zero-phase current transformer 14 is connected to the fixed contact portion 4b by the main circuit conductor 15b. The drawer type switch 2 such as a circuit breaker having the disconnecting contact portions 1a and 1b that come into contact with and separate from the fixed contact portions 4a and 4b, respectively, is stored in the storage frame 5 or pulled out. On the front side of the door 9, a monitoring device 7 such as an operation switch, a measuring device and a protective device is attached, and a test terminal 8 for testing the monitoring device 7 is attached. The monitoring device 7, the test terminal 8 and the drawer type switch 2 are connected by a control wire 12.

In the above-mentioned conventional metal-closed switchgear, as shown in FIG. 2, when the drawer-type opener 2 is housed in the housing frame 5, the disconnect type contact parts 1a and 1b are fixed contact parts 4a. , 4b, respectively, and the metal closed switchgear is in operation. When performing a test or the like, the handle 6 is operated to open the door 9. Next, when the pullout switch 2 is pulled out from the storage frame 5, the disconnection type contact portions 1a and 1b are separated from the fixed contact portions 4a and 4b, respectively, and the pullout type switch 2 is in the disconnection position. In this state, the test terminal 8 is used to perform a necessary test of the monitoring device 7. After the test is completed, the drawer type switch 2 is housed in the housing frame 5 by performing the reverse operation to the above drawer operation.

[0004]

[Problems to be solved by the device]

 In the conventional metal-closed switchgear described above, the pull-out switch 2 is in the operating position during operation and is in the disconnection position when performing a test or the like, but it may be forgotten to return to the operating position after the test. Moreover, with the door 9 closed, it is not possible to confirm whether it is the operating position or the disconnecting position. In addition, when inspecting the current transformer 13 and the zero-phase current transformer 14, it is necessary for a person to enter the box body 10.

Further, a space is required on the opening side to open the door 9, which makes it difficult to install the door 9. Further, since the monitoring device 7 is attached to the door 9 and the drawer type switch 2 is housed in the storage frame 5, these must be electrically connected, and control is performed from the door 9 to the drawer type switch 2. The electric wire 12 is required. Therefore, the present invention makes it possible to easily confirm the operation or disconnection state of the drawer type switch from the outside, and to easily inspect or replace the current transformer and zero-phase current transformer, and also to open and close the door. The purpose is to reduce the size of.

[0006]

[Means for Solving the Problems]

 In the box with the front opening, fix the storage frame with two fixed contact parts attached. A tester equipped with a current transformer or a zero-phase current transformer, and having two disconnecting contact parts that come in contact with and separate from the fixed contact part, and a test device and a test for testing this monitor device. Provide a drawer-type switch with the terminals for installation on the front side. The drawer type switch is formed so as to close the front surface of the box body when stored in the storage frame.

[0007]

[Action]

 Since the current transformer and zero-phase current transformer, the monitoring device and the test terminal are mounted on the drawer type switch, the control wire is not required. In the operating position, the drawer type switch closes the front surface of the box body, and in the disconnection position, the drawer type switch protrudes from the front surface of the box body.Therefore, no door is required, and it is in the operating position or in the disconnection position. You can easily check if there is. Moreover, since the current transformer and the zero-phase current transformer are mounted on the drawer type switch, inspection and replacement can be easily performed by pulling out the drawer type switch.

[0008]

【Example】

 1A and 1B show an embodiment of a metal-closed switchgear according to the present invention. FIG. 1A is a front view and FIG. 1B is a side view. In the figure, a storage frame 5 to which fixed contact portions 4a and 4b are attached is fixed in a box body 20 having an open front surface. On the inside of the box body 20 of the drawer type switch 22, the disconnect type contact parts 11a and 11b are respectively attached to and separated from the fixed contact parts 4a and 4b. A current transformer 23 is mounted on the disconnecting contact portion 11a, and a zero-phase current transformer 24 is mounted on the disconnecting contact portion 11b. A monitoring device 7, a test terminal 8 and a handle 16 are attached to the front side of the drawer type switch 22. Further, the drawer type switch 22 closes the front surface of the box body 20 during operation, that is, when it is stored in the storage frame 5, and projects from the front surface of the box body 20 when it is disconnected from the box 20, that is, when it is pulled out from the storage frame 5. Formed to emerge.

In the metal closed switchgear of the present invention, as shown in FIG. 1, when the drawer type switch 22 is housed in the housing frame 5, the disconnect type contact parts 11a and 11b are fixed contact parts 4a. The metal-closed switchgear is in operation by contacting the contact points 4 and 4b, respectively. Further, at this time, the drawer type switch 22 closes the front surface of the box body 20, so that it can be easily confirmed that the vehicle is in operation. When conducting a test or the like, if the handle 16 is operated to pull out the drawer-type switch 22 from the storage frame 5, the disconnection-type contact portions 11a and 11b are separated from the fixed contact portions 4a and 4b and pulled out. The switch 22 is in the disconnecting position. In this state, the test terminal 8 is used to perform a necessary test of the monitoring device 7. Further, at this time, since the drawer-type switch 22 projects from the front surface of the box body 20, it can be easily confirmed that it is in the disconnection position. Further, if the pull-out switch 22 is completely pulled out from the inside of the box body 20, the current transformer 23 and the zero-phase current transformer 24 can be inspected. After the test is completed, the drawer type switch 22 is housed in the housing frame 5 by performing the reverse operation to the above drawer operation.

[0010]

[Effect of device]

 As is apparent from the above description, the present invention makes it possible to easily confirm from outside whether the drawer type switch is in the operating position or the disconnecting position. In addition, since the door is unnecessary, the space on the drawer side can be reduced. Further, the control electric wire from the door to the drawer type switch is unnecessary. Moreover, the current transformer and the zero-phase current transformer can be easily inspected and replaced.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention, in which (A) is a front view and (B) is a side view.

FIG. 2 shows a conventional example, (A) is a front view and (B) is a side view.

[Explanation of symbols]

 5 Storage Frame 7 Monitoring Device 8 Test Terminals 11a, 11b Disconnection Type Contact Section 16 Handle 20 Box 22 Drawer Switch 23 Current Transformer 24 Zero Phase Current Transformer

Claims (1)

[Scope of utility model registration request] 1. A storage frame having two fixed contact portions attached thereto is fixed in a box body having a front opening, and a current transformer or a zero-phase current transformer is provided respectively,
A pull-out switch having two disconnection-type contact portions that come into contact with and separate from the fixed contact portion, and a monitoring device and a test terminal for testing the monitoring device, which are attached to the front side, is provided. The drawer-type switch is a metal-closed switchgear formed so as to close the front surface of the box body when stored in the storage frame.