JPH0521802Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an electric device for moving a drawer-type vacuum circuit breaker between an operating position and a disconnection position.

(Prior art and its problems) In a drawer-type vacuum circuit breaker housed in a closed type switchboard, etc., the primary disconnecting section is automatically connected when manually inserted to the operating position, and the primary disconnecting section is automatically connected when the drawer is pulled out. It is starting to be opened. Therefore, for example, in circuits that are not used for a long time due to the season, such as air conditioning circuits, it is recommended for safety to pull out the vacuum circuit breaker to the disconnection position to open the primary disconnection section. However, in order to pull out the vacuum circuit breaker, it is necessary to open the switchboard door and do this manually, and when opening the door, care must be taken to prevent small animals, moisture, and dust from entering, which is cumbersome. Therefore, only the main contacts of the vacuum circuit breaker are opened, and the vacuum circuit breaker is rarely pulled out to the disconnection position.

Therefore, the present invention enables the vacuum circuit breaker to be moved between the operating position and the disconnection position by remote control without opening the switchboard door or directly touching the vacuum circuit breaker. It is intended to be.

(Means for solving the problems) In the present invention, in order to solve the above problems,
A threaded rod 4 is rotatably mounted on the base 2 on which the drawer-type vacuum circuit breaker 1 is mounted, facing the moving direction of the vacuum circuit breaker 1, and a slide nut 9 is screwed onto the threaded rod 4. The vacuum circuit breaker 1
, and one end of the threaded rod 4 is connected to the bottom of the gear 4.
The drive motor 8 is connected to a drive motor 8 through a transmission mechanism such as b, 8b, and the drive motor 8 has a manual handle installed in a storage location of the manual handle attached to the switchboard for manually operating the threaded rod. A control circuit is connected which has interlock switches IL1 and IL2 that are open when the vacuum circuit breaker is not in the retracted state and closed when it is in the retracted state, and limit switches LS1 and LS2 that are provided at the operating position and the disconnection position of the vacuum circuit breaker 1. By controlling the drive motor 8 with this control circuit, the threaded rod 4 is rotated in forward and reverse directions to freely move the vacuum circuit breaker 1 between the operating position and the disconnection position, thereby forming a moving device for a draw-out type vacuum circuit breaker. Configured.

(Operation) In the present invention, the motor 8 is remotely controlled to rotate the threaded rod 4, thereby moving the slide nut 9 on the threaded rod 4. Then, the vacuum circuit breaker 1 is moved together with the slide nut 9 between the operating position and the disconnection position to connect and open the primary disconnection section 3. When moving the vacuum circuit breaker manually,
This is done by attaching a manual handle to the threaded rod 4 and turning the threaded rod. At this time, when the manual handle is removed from the storage location, the interlock switch opens the drive motor control circuit and disconnects the drive motor from the power source. Further, when the vacuum circuit breaker 1 reaches the operating position or the disconnection position, the connection between the drive motor and the power source is cut off by the limit switches LS1 and LS2.

(Embodiment) An embodiment of the present invention is shown in FIGS. 1 to 4.
1 is a side view, FIG. 2 is a partially enlarged side view, FIG. 3 is a plan view of the same, and FIG. 4 is a control circuit diagram.

In the figure, a vacuum circuit breaker 1 is equipped with wheels 1a and can be moved back and forth on a base 2 within a switchboard. When the vehicle is in the rear operating position, the primary disconnector 3 at the back is connected to the main circuit, and when the vehicle is in the forward disconnector position, the primary disconnector 3 is separated from the main circuit.

A threaded rod 4 is rotatably installed on the base 2 in the front-rear direction (the direction in which the vacuum circuit breaker 1 moves). That is, the threaded rod 4 is supported by bearing bodies 5 and 6 on the base 2 near both ends, and has an engaging part 4a for connecting a manual handle at the front end.
Further, each of the rear end portions is provided with a passive gear 4b.

Further, on the base 2, a drive motor 8 is fixed to the rear end side of the threaded rod 4 via a mounting base 7. A drive gear 8 is attached to the rotation shaft 8a of the drive motor 8.
b is fixed and meshed with the passive gear 4b. Therefore, the threaded rod 4 can be rotated in forward and reverse directions by the drive motor 8.

A slide nut 9 is screwed onto the threaded rod 4. This slide nut 9 is connected to the bottom of the vacuum circuit breaker 1 so that it can be coupled and separated. That is,
An operating lever 10 is vertically rotatably pivoted at the bottom of the vacuum circuit breaker 1, and an engagement pin 10a fixed horizontally near its rear end engages the upper part of the slide nut 9 in the lower position. It is adapted to fit into the recess 9a. The operating lever 10 extends forward of the vacuum circuit breaker 1, and an operating handle 10b is provided at the front end thereof. Normally, the rear of the operating lever 10 descends due to its own weight and the engaging pin 10a engages with the engaging recess 9a of the slide nut 9, but when the operating handle 10b is pushed down, the rear of the operating lever 10 is rotated upward, and the engagement pin 10a is disengaged from the engagement recess 9a of the slide nut 9. In this state, the vacuum circuit breaker 1 can be pulled out of the switchboard.

LS1 and LS2 are limit switches fixed on the base 2, which detect the operating position and disconnection position of the vacuum circuit breaker 1, respectively, and open and close contacts in the control circuit.

Further, the moving device has the following electrical interlock with the vacuum circuit breaker 1. That is, the moving device cannot be operated when the vacuum circuit breaker 1 is in the on state (the moving device can be operated to insert or withdraw the vacuum circuit breaker 1 only when the vacuum circuit breaker 1 is in the off state). , so that the vacuum circuit breaker 1 cannot be turned on when the vacuum circuit breaker 1 is in the middle of being inserted or pulled out (it can only be turned on when the vacuum circuit breaker 1 is in a predetermined operating position or disconnection position). It's getting old. Its specific circuit configuration is shown in FIG.

Therefore, when moving the vacuum circuit breaker 1, when the remote control switches PB1 and PB2 are turned on and the drive motor 8 is rotated, the rotation is transmitted to the threaded rod 4 via the gears 8b and 4b. A slide nut 9 screwed into the slide nut 9 moves on the threaded rod 4.
The vacuum circuit breaker 1 includes an engagement pin 10a and an operating lever 1.
Since it is connected to the slide nut 9 via the slide nut 9, it moves together with the slide nut 9 to a predetermined operating position or disconnection position, and at each position, the limit switches LS1 and LS2 operate and stop.

When moving the vacuum circuit breaker 1 manually, this is done by connecting a manual handle (not shown) to the engaging portion 4a of the threaded rod 4 and turning the threaded rod four times.
The manual handle is normally installed in a predetermined storage location within the switchboard. An interlock switch is provided in this storage location, and when the manual handle is in the storage state, its contact IL2
can be closed to configure the control circuit for the mobile device, and the control circuit cannot be configured when the manual handle is removed from the storage location.

A control circuit for controlling this moving device is shown in FIG. The operation of this moving device will be explained with reference to FIG. It is now assumed that the vacuum circuit breaker 1 is in the disconnected position (the state indicated by the imaginary line in FIGS. 2 and 3), and that the main contact (not shown) of the vacuum circuit breaker 1 is in the OFF state. At this time, as shown in Figure 4, limit switch LS1
The contact of limit switch LS2 is closed, and the contact of limit switch LS2 is open. In addition, since the main contact of the vacuum circuit breaker 1 is in the OFF state and the manual operation handle is stored in the predetermined position, the interlock contact IL1,
IL2 is in closed state. When moving the vacuum circuit breaker 1 to the operating position from this state, first turn on the insertion operation switch PB1, and the relay RX1 will operate.
Since the contact Xa1 closes, the motor 8 rotates normally and the vacuum circuit breaker 1 is inserted, and immediately after that, the contact of the limit switch LS2 closes. When the vacuum circuit breaker 1 reaches the operating position (state shown by the solid line in Figures 2 and 3), the contact of the limit switch LS1 opens, the relay contact Xa1 returns, the circuit of the motor 8 opens, and the relay contact Xb1 opens. The circuit returns and closes, and the control resistance R is activated, causing the motor 8 to stop instantaneously and the vacuum circuit breaker 1 to stop as well. To move the vacuum circuit breaker 1 to the disconnection position from this state, turn on the pullout operation switch PB2, and the relay RX2 will operate.
Since the contact Xa2 closes, the motor 8 reverses and the vacuum circuit breaker 1 is pulled out, and immediately after that, the contact of the limit switch LS1 closes. When the vacuum circuit breaker 1 reaches the disconnection position (the state shown by the imaginary line in Figures 2 and 3), the contact of the limit switch LS2 opens, the relay contact Xa2 returns to its original state, the circuit of the motor 8 opens, and the relay contact Xb2 returns and closes the circuit,
When the braking resistance R is activated, the motor 8 stops instantaneously, and the vacuum circuit breaker 1 also stops.

(Effects of the invention) As described above, in the present invention, the threaded rod 4 is rotatably mounted on the base 2 on which the drawer-type vacuum circuit breaker 1 is mounted, in the direction of movement of the vacuum circuit breaker 1. Screw the slide nut 9 into 4,
This slide nut 9 is connected to the bottom of the vacuum circuit breaker 1, and one end of the threaded rod 4 is connected to a drive motor 8 via a transmission mechanism such as gears 4b and 8b. Interlock switches IL1 and IL2 are placed in the storage location of the manual handle attached to the switchboard for manual operation, and are open when the manual handle is not in the retracted state, but closed when it is in the retracted state, and a vacuum cutoff switch. A control circuit having limit switches LS1 and LS2 provided at the operating position and the disconnection position of the device 1 is connected,
By controlling the drive motor 8 with this control circuit, the threaded rod 4 is rotated in forward and reverse directions to freely move the vacuum circuit breaker 1 between an operating position and a disconnection position, thereby configuring a moving device for a drawer-type vacuum circuit breaker. . Therefore, the vacuum circuit breaker 1 can be moved by remote control without opening the door of the switchboard and without directly touching the vacuum circuit breaker 1. As a result, the vacuum circuit breaker 1 can be pulled out and inserted as often as necessary without hesitation, thereby improving the safety of the circuit. It also has the effect that the moving device can be operated manually if necessary.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and Fig. 1 is a side view, Fig. 2 is a partially enlarged side view, and Fig. 3 is a partially enlarged side view.
The figure is a plan view of the same, and FIG. 4 is a control circuit diagram. 1...Drawer type vacuum breaker, 2...Base, 3...
...Primary disconnection section, 4...Threaded rod, 4b, 8b...Gear (transmission mechanism), 8...Drive motor, 9...Slide nut, 9a...Engagement recess, 10...Operation lever, 10a... ...Engagement pin.

Claims (1)

[Scope of utility model registration request] A threaded rod is rotatably mounted on the base on which the drawer-type vacuum circuit breaker is mounted, facing the direction of movement of the vacuum circuit breaker, and a slide nut is screwed onto the threaded rod.
This slide nut is connected to the bottom of the vacuum circuit breaker, and one end of the threaded rod is connected to a drive motor via a transmission mechanism, and this drive motor is equipped with a switchboard for manual operation of the threaded rod. an interlock switch disposed in a storage location of the manual handle, which opens when the manual handle is not in the retracted state and closes when the manual handle is in the retracted state;
A control circuit having limit switches provided at the operating position and the disconnection position of the vacuum circuit breaker is connected, and the screw rod is rotated in forward and reverse directions under the operation control of the drive motor to move the vacuum circuit breaker between the operation position and the disconnection position. A moving device for a drawer-type vacuum circuit breaker, characterized in that it is movable.