JP3182610B2 - 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 switchgear (closed switchboard), and more particularly to a switchgear (closed switchboard) for controlling a breaker at a predetermined position when the breaker enters and exits a box when the breaker is attached to and detached from a main circuit. The present invention relates to a switchgear capable of automatically and easily opening and closing a circuit.

[0002]

2. Description of the Related Art When a circuit breaker is attached to or detached from a main circuit at the time of inspection or replacement of a switchgear circuit breaker, a state in which a control circuit in the circuit breaker is connected, that is, a state in which the circuit breaker is connected in order to secure work safety. It is necessary to carry out the attachment / detachment with the electric interlock completely completed.

Conventionally, in such a case, an operator manually connects the connector of the control circuit to connect the control circuit by hand, and the connection to the main circuit is incomplete due to a work error. There is a fear that the circuit breaker may be attached and detached, there is a problem in securing safety, and the connection work is complicated.

[0004]

SUMMARY OF THE INVENTION Therefore, according to the present invention, a connector of a control circuit in a circuit breaker is automatically set at a predetermined position when the circuit breaker is moved in and out of a box when the circuit breaker is attached to and detached from a main circuit. It is an object of the present invention to provide a switchgear capable of fitting and connecting to and disconnecting from a control circuit, eliminating the risk of connection failure of a control circuit, ensuring the safety of workers, and improving the work efficiency of inspection and replacement. .

[0005]

In order to achieve the above-mentioned object, the present invention provides a control circuit in which one of a pair of male and female connectors of a control circuit to be fitted and connected to each other is fixed to a circuit breaker, and the other is provided inside a box body. It is slidably fitted in a guide groove formed in a guide plate fixed to the side wall surface, and is arranged so as to be movable along with the operation of the circuit breaker. The guide groove is provided between the base end on the main circuit side and the end on the opposite side thereof in a straight path parallel to the direction in which the circuit breaker enters and exits from the box, and near the tip between the straight paths, and And an inclined path portion which is bent and inclined in the direction. A pair of male and female connectors of the control circuit are formed with a projection and a fitting recess so as to come into contact with each other during sliding movement along the guide groove to be connected and disconnected. A pair of male and female connectors come into contact with each other at the portion of the straight path and the inclined path from the front surface of the box to the disconnection position with respect to the main circuit of the circuit breaker in front of the box, and the connection is released and the control circuit is released. Without opening and closing,
In the part of the straight path from the inclined path from the position of the disconnection to the main circuit of the circuit breaker to the connection position on the rear side of the inside of the box to the main circuit side base end, a pair of male and female connectors are connected and the circuit breaker enters and exits. It moves in conjunction with it, and the connection state of the control circuit is maintained. With these structures, the pair of connectors of the control circuit are automatically connected and disconnected at the above-mentioned predetermined position accompanying the operation of moving the circuit breaker into and out of the box pair when the circuit breaker is attached to and detached from the main circuit. It will be opened and closed automatically, and the intended purpose will be achieved.

In order to more quickly, easily and surely automatically open and close the control circuit in the circuit breaker, the circuit breaker or the circuit breaker and the front door of the box are drawn out to the box through the draw-out rail. It is arranged so that it can enter and exit (withdrawal possible).

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of a switchgear according to the present invention will be described with reference to FIGS.

FIG. 1 is a longitudinal sectional front view of the switchgear 1 with the front door 9 removed. Switch gear 1 box 1
a, the circuit breaker 2 is arranged via the draw-out rails 4, 4 and the front door 9 is arranged via the draw-out rails 5, 5 so as to be able to enter and exit (withdrawal) the box 1a. I have. Further, in the box 1a, an automatic opening / closing device 3 for a control circuit in the circuit breaker 2 such as a pair of male and female connectors 3a and 3b which are fitted and connected to each other is provided.

The draw-out rails 5, 5 are arranged on the side walls inside the box 1a, and are formed by a receiving member fixed to the side walls and a drawer member slidably fitted thereto. The door mounting plate 8 and the circuit breaker mounting plate 6 are fixed to the drawer member. A front door 9 is pivotally attached to the door mounting plate 8 via a hinge 10. Reference numeral 13 denotes an instrument which is attached to both sides of the front door 9. Therefore, the front door 9 is provided so as to be openable and closable with respect to the box 1a via the hinge 10 and to be able to enter and exit the box 1a via the draw-out rail 5.

The breaker mounting plate 6 includes drawer rails 4, 4
Is installed. Each of the draw-out rails 4 and 4 comprises a receiving member fixed to the circuit breaker mounting plate 6 and a drawer member slidably fitted thereto. 7 is fixed. The circuit breaker 2 is detachably attached to the circuit breaker mounting brackets 7,7. Therefore, the circuit breaker 2 is provided so as to be able to enter and exit the box 1a via the draw-out rails 4 and 5.

A power supply-side disconnecting portion 2a and a load-side disconnection 2b protrude from the rear and side surfaces of the circuit breaker 2, and these are connected to a power supply bus 14 disposed on the rear side inside the box 1a.
Contact portion 14a of the relay conductor 15 and the breaker connection terminal 15 of the relay conductor 15.
a. 14b is a support insulator of the power supply bus 14, and 16 is a current transformer.

The control circuit automatic opening / closing device 3 includes a pair of male and female connectors 3a and 3b, a guide plate 3c, and a guide groove 3e. The guide plate 3c is a pair of upper and lower parts,
The circuit breaker 2 is fixedly arranged on the side wall inside the box 1a via the mounting bracket 3d in parallel with the direction in which the circuit breaker 2 enters and exits via the draw-out rails 4 and 5. The guide groove 3e is formed along the longitudinal direction of the guide plate 3c. As shown in the figure, the power supply bus 14 and the rear end of the main circuit side of the circuit breaker 2 and the part of the distal end opposite to the main circuit side are interrupted. A part of the linear path parallel to the direction in which the circuit breaker 2 enters and exits and a portion near the front end is formed as an inclined path that is bent and inclined toward the circuit breaker 2 side. Of the pair of male and female connectors 3a, 3b, the male connector 3a is fixed to the circuit breaker 2, and the female connector 3b is formed with a pair of guide grooves 3e, 3e formed in a pair of upper and lower guide plates 3c, 3c via guide pins 3f. 3e is slidably fitted. Therefore, the female connector 3b is movable along the guide groove 3e. The pair of male and female connectors 3a and 3b are formed with a projection and a fitting recess so as to be in contact with each other and fitted and connected. Reference numerals 11 and 12 are connection lines of a control circuit connected to the male connector 3a and the female connector 3b.

When inspecting or replacing the circuit breaker 2, the circuit breaker 2 is removed from the connection position of the circuit breaker 2 to the main circuit in FIG. 3 and moved to the disconnection position in FIG. 4, and further the box 1a in FIG. The circuit breaker 2 is connected to the main circuit by performing the reverse operation after the operation is completed.

In FIG. 3, the circuit breaker 2 has a power supply side disconnecting portion 2a fitted and connected to a contact portion 14a of a power supply bus, and a load side disconnecting portion 2b fitted and connected to a breaker connection terminal 15a of a relay conductor. In this state, the pair of connectors 3a and 3b of the control circuit are fitted and connected as described later, so that the control circuit is closed and electrically interlocked. I have. To check or replace the breaker 2 from this state, pull out the breaker 2
When the control circuit is pulled out to the front through the connector 4 and disconnected from the main circuit and moved to the disconnection position shown in FIG. 2 and the guide groove 3e move in conjunction with the sliding and pulling movement of the circuit breaker 2 through a linear path parallel to the direction of the circuit breaker 2 going in and out, so that the connection state of the control circuit is maintained during this time. Further, as shown in FIG. 5, when the circuit breaker 2 and the front door 9 are pulled out to the pull-out position outside the box 1a through the draw-out rail 5, the female connector 3b is brought into the guide groove 3e.
The male connector 3a fixed to the circuit breaker 2 is pulled out of the mating connection with the female connector 3b by being swung in a direction away from the circuit breaker 2 at the inclined path portion of the female connector 3b.
Stops at the linear path at the end of the guide groove 3e, while the male connector 3a moves to the outside of the box 1a with the circuit breaker 2, so that the control circuit is automatically opened and the connection state is released. You. In this state, the circuit breaker 2 is inspected or replaced.

After the work is completed, the circuit breaker 2 is pushed back into the box 1a via the draw-out rail 5 from the draw-out position in FIG. 5 to the disconnection position in FIG. Then, the female connector 3b is pushed by the projection of the male connector 3a fixed to the circuit breaker 2, and the female connector 3b moves the straight path portion at the tip of the guide groove 3e to the male connector 3a.
Therefore, it moves parallel to the circuit breaker 2 and is shaken (pressed) toward the circuit breaker 2 at the portion of the inclined path, and is automatically fitted and connected to the male connector 3a. When the circuit breaker 2 is further moved from the disconnection position with respect to the main circuit in FIG. 4 through the draw-out rail 4, the control circuit is in a state where the pair of male and female connectors 3a and 3b are fitted and connected. The circuit breaker 2 moves to the position of FIG. 3 in the connected state, and reaches a state where the circuit breaker 2 is connected to the main circuit. Therefore, while the circuit breaker 2 is moved from the disconnection position with respect to the main circuit in FIG. 4 to the connection position in FIG. 3, the connection state of the control circuit is automatically maintained.

In the above embodiment, the breaker 2
And the front door 9 is pulled out through the draw-out rails 4 and 5 to form the box 1
Although a device that is provided so as to be able to enter and exit a is shown, it is not always necessary to limit to such means. However, when such means are adopted, the box 1a of the circuit breaker 2 with respect to the main circuit
Automatic opening and closing of the control circuit at a predetermined position at the entrance to and exit from the control circuit. It is more preferable for easy and certainty.

[0017]

Since the present invention has the above-described structure, the above-mentioned various disadvantages of the prior art can be solved and the following specific effects can be obtained.

According to the first aspect of the present invention, an automatic opening / closing device for a control circuit having a pair of male and female connectors is provided so that the circuit breaker can be moved into and out of the box when the circuit breaker is attached to and detached from the main circuit. In the associated predetermined position, that is, between the connection position of the circuit breaker with respect to the main circuit and the disconnection position, the automatic connection state of the control circuit in the circuit breaker is reliably maintained by the fitting connection of the pair of male and female connectors. The disconnection is automatically performed between the disconnection position and the withdrawal position with respect to the main circuit of the circuit breaker, so that the disconnection operation of the breaker with respect to the main circuit is performed without the connection of the control circuit due to a work error as in the related art. There is no danger and the safety in the inspection and replacement work of the circuit breaker can be reliably maintained. Further, since there is no need to manually connect the pair of male and female connectors as in the related art, the efficiency of inspection and replacement work of the circuit breaker can be improved.

According to the second aspect of the present invention, since the circuit breaker is disposed so as to be able to enter and exit the box via the draw-out rail, the control circuit can automatically connect and disconnect the pair of male and female connectors. Automatic opening and closing can be performed more quickly, easily and reliably.

According to the third aspect of the present invention, not only the circuit breaker but also the front door of the switchgear is provided so as to be able to enter and exit the box body via the draw-out rail. Even when the meter is attached, the circuit breaker can be smoothly pulled out of the box without hindering the meter, which is more preferable for inspection and replacement work of the circuit breaker.

[Brief description of the drawings]

FIG. 1 is a vertical sectional front view of a switchgear according to an embodiment of the present invention excluding a front door.

FIG. 2 is a vertical right side view of the same.

FIG. 3 is a cross-sectional plan view of the same at the connection position of the circuit breaker to the main circuit.

FIG. 4 is a cross-sectional plan view of the circuit breaker in the disconnection position with respect to the main circuit.

FIG. 5 is a cross-sectional plan view of the circuit breaker in a drawer position with respect to a main circuit.

FIG. 6 is a perspective view showing an automatic switching device of a control circuit in the circuit breaker.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Switchgear 2 Breaker 2a Power-side disconnection part 2b Load-side disconnection part 3 Automatic opening and closing device of control circuit in circuit breaker 3a Male connector of control circuit 3b Female connector of control circuit 3c Guide plate 3d Mounting bracket 3e Guide groove 3f Guide pin Reference Signs List 4 breaker draw-out rail 5 breaker and front door draw-out rail 6 breaker mounting plate 7 breaker mounting bracket 8 door mounting plate 9 front door 10 hinge 11 control circuit connection line 12 control circuit connection line 13 instrument 14 Power bus 14a Contact part 15 Relay conductor 15a Circuit breaker connection terminal 16 Current transformer

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H02B 1/10 H02B 11/04 H01R 13/56-13/72 H01R 19/00-23/72

Claims (3)

(57) [Claims] When a circuit breaker is inserted into or removed from a main circuit at the time of attachment / detachment operation of the circuit breaker from / to a main circuit,
One of the pair of male and female connectors in the control circuit is fixedly arranged on the circuit breaker, and the other is connected to the box so that the pair of male and female connectors of the control circuit in the circuit breaker automatically come into contact with each other and are connected and disconnected. Formed on a guide plate fixed to the inside wall of the body, the path between the base end on the main circuit side and the end on the opposite side is a straight path parallel to the entry / exit direction of the circuit breaker. The main circuit of the circuit breaker from the front of the box body to the front of the box body is slidably fitted in the guide groove, which is formed as an inclined path that bends and inclines in the circuit breaker side direction. A pair of male and female connectors are brought into contact with each other at the portion of the straight path and the inclined path reaching the disconnection position with respect to the control circuit, and the control circuit is opened and closed by releasing the connection and the disconnection of the circuit breaker with respect to its main circuit. Connection from the position to the back of the box In the part of the straight path from the inclined path to the main circuit side base end to the main circuit side, the pair of male and female connectors move in conjunction with the in / out operation of the circuit breaker in the connected state so that the connected state of the control circuit is maintained. Switchgear characterized by what has been done. 2. A circuit breaker according to claim 1, further comprising:
One of the pair of male and female connectors in the control circuit is fixedly arranged on the circuit breaker, and the other is connected to the box so that the pair of male and female connectors of the control circuit in the circuit breaker automatically come into contact with each other and are connected and disconnected. Formed on a guide plate fixed to the inside wall of the body, the path between the base end on the main circuit side and the end on the opposite side is a straight path parallel to the entry / exit direction of the circuit breaker. Drawer rail in which the path of the section is slidably fitted and movably disposed along a guide groove which is an inclined path bent and inclined in the circuit breaker side direction, and the circuit breaker is provided on the side wall surface of the box body And a pair of male and female connectors in a part of the straight path and the inclined path from the front of the box to the disconnection position with respect to the main circuit of the circuit breaker in front of the box. Contact and mating connection The control circuit is opened and closed by disengagement from the main circuit, and the straight line path from the inclined path from the disconnection position of the circuit breaker to the main circuit to the connection position on the rear side of the box from the main circuit side base end is formed. A switchgear characterized in that a pair of male and female connectors are moved in conjunction with an in / out operation of a circuit breaker in a connected state to maintain a connected state of a control circuit. 3. A circuit breaker according to claim 1, further comprising:
One of the pair of male and female connectors in the control circuit is fixedly arranged on the circuit breaker, and the other is connected to the box so that the pair of male and female connectors of the control circuit in the circuit breaker automatically come into contact with each other and are connected and disconnected. Formed on a guide plate fixed to the inside wall of the body, the path between the base end on the main circuit side and the end on the opposite side is a straight path parallel to the entry / exit direction of the circuit breaker. Slidably fit into the guide groove, which is an inclined path that bends and inclines in the circuit breaker side direction, and is disposed so as to be movable along the guide groove. The straight path and the inclined path extending from the front of the box to the disconnection position with respect to the main circuit of the circuit breaker in front of the box through the drawer rail provided on the wall surface. A pair of male and female connectors The control circuit is opened and closed by touching and connecting and releasing the fitting, and the main circuit side base is connected to the main circuit side from the inclined path from the disconnection position of the circuit breaker to the main circuit to the connection position at the back of the box. A switchgear characterized in that a pair of male and female connectors move in conjunction with an in / out operation of a circuit breaker in a connected state at a portion of a straight path to an end to maintain a connected state of a control circuit.