JPH11234820A - Drawer breaker - Google Patents

Abstract

(57) [Problem] To provide a drawer-type circuit breaker in which an interlock for disconnection section operation reliably operates if there is an error in disconnection section closing operation. A fixed connector (13) is fixed to a switchboard (1) and a movable connector (14) has a flexible control line (15).
The connector lock 16 is provided so as to be movable up and down freely, and when the disconnecting portion 9 is disconnected, the connector lock 16 is lowered to abut the side surface of the operation portion 5 and the disconnecting portion 9 is closed. Then, the connector lock 16 is raised, and the lower portion of the connector lock 16 is placed on the upper surface of the operation unit 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drawer-type circuit breaker housed in a switchboard, and more particularly, to a drawer-type circuit breaker in which if a disconnection section closing operation is erroneous, the disconnection section closing interlock operates reliably. About.

[0002]

2. Description of the Related Art FIG. 7 is a partially broken side view showing the structure of a conventional drawer-type circuit breaker, in which a side plate of a switchboard 1 shown in FIG. 7 is partially broken and the inside thereof is viewed. An opening / closing door 3 is attached to the front side of the switchboard 1 (the right side in FIG. 7), on which a blocking unit 6 and an operation unit 5 are mounted, and a bogie 4 equipped with wheels 7 can be pulled out from the inside of the switchboard 1 to the right. is there. A vacuum circuit breaker that opens and closes the main circuit is housed inside the breaking unit 6. On the other hand, a mechanical mechanism for driving a movable contact of the vacuum circuit breaker is housed in the operation unit 5, and an opening / closing driving force is transmitted to the circuit breaker 6 via a hinge mechanism. On the depth side of the cart 4 (left side in FIG. 7), a disconnecting section 9 which comes into contact with and separates from a main circuit (not shown) inside the switchboard 1 by taking the cart 4 in and out.
Is provided. FIG. 7 shows a state in which the disconnecting section 9 is opened, the breaking section 6 is disconnected from the main circuit inside the switchboard 1, and the breaking section 6 and the operating section 5 are tested without charging the breaking section 6 with a high voltage. , In which the blocking unit 6 is not used. Generally, a plurality of switchboards 1 having the same configuration as that of FIG. 7 are arranged vertically and horizontally, but FIG. 7 shows only one of them. Reference numeral 2 denotes a wiring duct fixed to the switchboard 1, which passes through the switchboards 1. The cart 4 is also provided with an auxiliary circuit (not shown) for controlling the shut-off unit 6 and the operation unit 5, and the auxiliary circuit includes a fixed connector 11 and a movable connector 10 which can be manually inserted and removed from each other. Power is supplied from the switchboard 1 via the power supply.
The fixed connector 11 is fixed to the carriage 4 side, and the movable connector 10 is connected to the switchboard 1 via a flexible control line 12.

FIG. 8 is a partially crushed side view showing a state in which the disconnecting section 9 of the apparatus shown in FIG. 7 is closed. The cart 4 is pushed into the depth side (left side), and the cutoff section 6 is connected to the main circuit inside the switchboard 1. The pair of the fixed connector 11 and the movable connector 10 also moves to the left with the carriage 4. For this purpose, the control line 12 is made flexible so that the control line 12 expands and contracts.

By the way, drawer-type circuit breakers are generally
The connector of the auxiliary circuit is provided with an interlock for disconnection. That is, in FIG. 7, if the bogie 4 is pushed into the depth side in a state where the movable connector 10 is detached from the fixed connector 11 and the disconnecting portion 9 is turned on, an open / close command is issued from the switchboard 1 to the shutoff portion 6. Even if it is issued, the shut-off unit 6 does not operate at all. Even if a work-only arrangement has been made, "If the cart 4 of the draw-out circuit breaker is to be pushed into the depth side, the fixed connector 11 and the movable connector 10 must be installed beforehand."
There is a possibility that the trolley 4 will be pushed into the depth side by mistake without inserting the movable connector 10 into the fixed connector 11. Therefore, there is a need for an interlock for disconnecting the disconnecting portion, which mechanically prevents the disconnecting portion 9 from being closed unless the connectors of the auxiliary circuit are connected to each other.

FIG. 9 is a side view showing the configuration of a different drawer-type circuit breaker of the related art. A drawer-side device 31 including a blocking unit and an operation unit is mounted on a fixed-side device 30 in a switchboard via wheels 7. The drawer-side device 31 is provided with an auxiliary circuit (not shown) for controlling the shut-off unit and the operation unit as in the device of FIG. Further, a fixed connector 32 that can be inserted into and removed from the lower right of the drawer-side device 31.
And a movable connector 33, and power is supplied to the auxiliary circuit from the fixed device 30 via the fixed connector 32 and the movable connector 33. The fixed connector 32 is fixed to the drawer-side device 31, and the movable connector 33 is connected to the fixed-side device 30 via the flexible control line 12. An interlock 40 for closing the disconnecting section 9 is attached to the movable connector 33.

FIG. 10A is a view taken in the direction of arrow F in FIG.
(B) is an EE cross-sectional view of (A) of FIG. 10. That is, FIG. 10A is an enlarged view of a main part of the interlock 40, which is a mechanism disclosed in Japanese Patent Application Laid-Open No. 2-273008. 10A or 10B, both ends of the reset spring 34 are fixed to the drawer-side device 31 and the locking plate 35, and the locking plate 35 is constantly urged downward. The locking plate 35 has an opening 35B.
Are provided, and a movable connector 33 and a fixed connector 32 are provided.
Is inserted and removed through the movable connector 33 through the opening 35B. Also, the opening 35B of the locking plate 35
As shown in FIG. 10A or FIG. 10B, stoppers 35A are provided on both sides at the upper edge. Stopper 35
A is in contact with the upper surface of the movable connector 33 and the locking plate 35
Is suppressed by the reset spring 34 from moving downward. On the other hand, as shown in FIG. 10A, a cover 35 </ b> C protrudes from the center of the upper edge of the opening 35 </ b> B of the locking plate 35 to prevent the movable connector 33 from coming off the fixed connector 32. An operation lever is provided below the locking plate 35.
A lock bar 37 provided with 36 is attached. The lock bar 37 penetrates the guide hole 41 of the drawer-side device 31 and has a lock plate 37A fixed to the lower end. A guide plate 38 and a guide block 39 are fixed on the fixed device 30 on the left side of FIG. As shown in FIG. 10A, a gap 38A
Are formed, and extend long in the closing direction of the disconnecting portion 9 (to the left in FIG. 9). The operation lever 36 is manually operated by the lock bar 3.
7, the lock plate 37A can be moved to the position X, Y, Z.

FIG. 9 shows a case where the disconnecting portion 9 is in a disconnected state. When the disconnecting portion 9 is put into the closed state, the lock plate 37A is moved by the operation lever 36 to the position X in FIG.
Up to As a result, the locking plate 35 is raised, so that the stopper 35A and the cover 35C do not interfere, and the movable connector 33 can be mounted on the fixed connector 32 through the opening 35B. After the fixed connector 32 and the movable connector 33 are attached, the operation lever 36
Is lowered, the stopper 35A of the locking plate 35 comes into contact with the movable connector 33, so that the locking plate 37A comes to the position Y as shown in FIG. In this state, the drawer-side device 31
Is pushed to the disconnecting portion 9 side, the lock plate 37A is located between the guide plate 38 and the guide block 39, and the lock bar 37 is located
8, the drawer-side device 31 moves without any obstacle. That is,
The disconnecting section 9 is inserted with the fixed connector 32 and the movable connector 33 mounted. On the other hand, when the movable connector 33 is not mounted on the fixed connector 32, the locking plate 35 is lowered by the reset spring 34, and the locking plate 37 A comes to the position Z. In this state, the drawer-side device 3
By pushing 1 toward the disconnecting portion 9, the lock plate 37A hits the guide block 39, and the movement of the drawer-side device 31 is prevented. That is, the closing of the disconnecting portion is interlocked.

[0008]

However, the interlock of the disconnecting portion in the above-mentioned conventional device can be prevented by operating the operating lever by mistake even if the movable connector is not mounted on the fixed connector. There was a problem that it could be thrown. That is, FIG.
In this interlock 40, if the movable connector 33 is not attached to the fixed connector 32 as described above, the drawer-side device 31 never moves and is safe. However, it is necessary to attach the fixed connector 33 to the movable connector 33 as an operation before the disconnecting section 9 is thrown.
Therefore, the fixed connector 33 cannot be attached to the movable connector 33 unless the operation lever 36 is once raised. In the unlikely event that the movable connector 33 is not yet attached to the fixed connector 32, the operation lever 36 is carelessly held, the lock plate 37A is placed at the position Y, and the drawer-side device 31 is moved. If pushed to the disconnecting section 9 side, the disconnecting section 9 may be thrown. From a safety standpoint, it is necessary to enable the interlock at the disconnection section to operate even in the event of an operational error.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a drawer-type circuit breaker in which an interlock for disconnecting the disconnection section operates reliably if the disconnection section closing operation is erroneous.

[0010]

According to the present invention, in order to achieve the above object, a truck carrying a cut-off portion and an operation portion is configured to be able to be pulled out from the inside of the switchboard to the near side, and A disconnecting part is provided on the depth side that comes in contact with and separates from the main circuit inside the switchboard by taking the bogie in and out.A bogie is provided with an auxiliary circuit that controls the shut-off part and the operating part inside the bogie. In a drawer-type circuit breaker that is supplied with power from the switchboard via a detachable fixed connector and a movable connector, the fixed connector is fixed to the switchboard and the movable connector is connected via a flexible control line. The movable connector and the fixed connector are connected to the trolley side. After inserting the movable connector into the fixed connector, the stopper provided on the fixed connector side is connected to the movable connector. As the fixed connector and the movable connector can not be pulled out from one another by engaging in,
The disconnection between the movable connector and the fixed connector is performed by disengaging the latch and then pulling the movable connector from the fixed connector, and the connector lock is provided below the fixed connector so as to be freely movable up and down. A groove is formed in the upper part of the connector lock, into which the stopper in the state where the movable connector is engaged is engaged with the connector lock.In the disconnection state of the disconnection part, the connector lock is lowered and abuts the side surface on the depth side of the operation part. In the inserted state, the connector lock is raised by fitting the groove into the stopper, and the lower part of the connector lock may be placed on the upper surface of the operation unit. As a result, the connector lock is lowered in the disconnection state of the disconnection part,
The trolley does not move to the depth side due to the contact between the connector lock and the operation unit. Moreover, even if you try to raise the connector lock while the movable connector is not attached to the fixed connector, the connector lock comes into contact with the stopper, so the connector lock does not rise and the contact between the connector lock and the operation unit must be released. Can not. on the other hand,
If the movable connector is mounted on the fixed connector and the stopper is properly engaged, the groove of the connector lock fits into the stopper so that the connector lock can be manually raised. As a result, the connector lock does not come into contact with the operation portion, so that the bogie moves to the depth side, and the disconnection portion can be inserted. Therefore,
When the disconnecting part is closed, the movable connector is always properly attached to the fixed connector, and it never happens that the connector is disconnected. That is, if there is an error in the disconnection section closing operation, the disconnection section closing interlock operates reliably.

In this configuration, a rotatable roller may be provided below the connector lock. Accordingly, when the carriage is moved to the depth side, the roller of the connector lock slides on the upper surface of the operation unit.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to embodiments. FIG. 1 is a partially broken side view showing a configuration of a drawer-type circuit breaker according to an embodiment of the present invention. A fixed connector 13 is fixed to the duct 2, and a movable connector 14 is fitted into the fixed connector 13. On the other hand, the movable connector 14 is connected to the carriage 4 via a flexible control line 15.
Connected to the side. Power is supplied to the auxiliary circuit (not shown) inside the carriage 4 from the switchboard 1 side by the fixed connector 13,
The path is formed by the movable connector 14 and the control line 15. In this device, a connector lock 16 is provided below the fixed connector 13 so as to be vertically movable. FIG.
Is a state in which the disconnecting portion 9 is opened, and the lower portion of the connector lock 16 is lower than the upper surface 5A of the operation portion 5. As will be described later, even if the trolley 4 is pushed to the depth side (left side) of the switchboard 1 unless the connector lock 16 is manually raised, the connector lock 16 contacts the depth side surface 5B of the operation unit 5 and the trolley 4 Does not move and the disconnection 9 is never closed.

FIG. 2 is a partially broken side view showing a state where the disconnecting section 9 of the apparatus shown in FIG. 1 is closed. Since the lower part of the connector lock 16 is manually raised to be higher than the operation part 5, even if the carriage 4 is pushed to the left side of the switchboard 1, the connector lock 16 does not become an obstacle, and the disconnection part 9 can be closed. Other configurations in FIGS. 1 and 2 are the same as those in FIGS. 7 and 8, respectively, which are conventional devices, and the same reference numerals are given to the same portions as those in the conventional device, and the detailed description is omitted.

FIG. 3 is an enlarged side view of a portion A in FIG.
FIG. 4 is a view on arrow C in FIG. 3. That is, this is a detailed view in the case where the connector lock 16 locks the closing of the disconnecting portion. In FIG. 3, the fixed connector 13 is fixed to the duct 2 via a mounting plate 26,
There are provided two guide shafts 22 below the guide shaft 22. The guide shaft 22 is fixed to the mounting plate 26 via the support plate 20. The connector lock 16 has a vertically long slot 21 formed therein.
Are penetrated, and measures are taken at both ends of the guide shaft 22 so that the connector lock 16 does not come out of the elongated hole 21. Therefore, the connector lock 16 can be freely moved only in the clear area of the elongated hole 21 in the vertical direction by the guide of the guide shaft 22. A roller 17 is rotatably mounted below the connector lock 16.

In FIG. 3, the fixed connector 13
The movable connector 14 is inserted in the connector. Above and below the fixed connector 13, a substantially U-shaped stopper 1 is attached via a shaft 19.
8 are attached. The stopper 18 is rotatable around the shaft 19 in the forward and backward directions in FIG. The catch 18
Fixed connector 13 and movable connector 14
Are engaged so that they do not come off from each other.
3 is in a state in which the fixed connector 13 and the movable connector 14 have not yet been engaged.

In FIG. 4, the stoppers 18 are arranged on both sides of the movable connector 14. With the stoppers 18 in this state, the movable connector 14 is inserted in and out of FIG. 4, and the movable connector 14 and the fixed connector 13 (FIG. 3). ). On the other hand, a groove 25 is formed in the upper part of the connector lock 16, and the groove 25 does not fit into the stopper 18 in the state of FIG.
So that it does not come up against it.

Returning to FIG. 3, in this state, even if the trolley is pushed to the right, the connector lock 16 abuts the side surface 5B of the operation unit 5, and the trolley cannot move. Therefore,
If the movable connector 14 has not been inserted yet, or the catch 18 has not been properly engaged with the movable connector 14, the disconnection will never be closed.

FIG. 5 is an enlarged side view of a portion B in FIG.
FIG. 6 is a view on arrow D in FIG. 5. That is, it is a detailed view in a case where the connector lock 16 is raised and the disconnecting portion is closed. In FIG. 5, the connector lock 16 is guided by the guide shaft 22 and rises, and the roller 17 below the connector lock 16 is arranged on the upper surface 5 </ b> A of the operation unit 5.

In FIG. 6, the movable connector 14 is fitted into the fixed connector 13, and the stopper 18 is rotated and is normally engaged with the movable connector 14. 25. Therefore, the connector lock 16 can freely move up and down. Returning to FIG. 5, if the connector lock 16 is manually raised and the cart is pushed to the right, the rollers 17 of the connector lock 16 slide on the upper surface 5 </ b> A of the operation unit 5. Therefore, the disconnecting portion is closed only when the movable connector 14 is inserted into the fixed connector 13 and the stopper 18 is properly engaged.

In FIG. 5, the roller 17 is not necessarily required, and it is sufficient if the lower portion of the connector lock 16 and the upper surface 5A of the operation section 5 slide with each other. By providing the rollers 17, the connector lock 16 and the upper surface 5A of the operation unit 5 do not wear.

[0021]

As described above, according to the present invention, the fixed connector is fixed to the switchboard side, the movable connector is connected to the bogie side via a flexible control line, and the connector lock is provided to be freely movable up and down. In the disconnected state of the disconnecting part, the connector lock goes down and abuts the side of the operation part,
The connector lock is raised when the disconnecting section is closed, and the lower portion of the connector lock is placed on the upper surface of the operation section 5. If the movable and fixed connectors of the auxiliary circuit are not attached to each other,
The disconnect will never be thrown. Therefore,
If there is an error in the disconnection section closing operation, the disconnection section closing interlock operates reliably, and it is never impossible to control the circuit breaker when the disconnection section is closed.

In this configuration, a rotatable roller is provided below the connector lock. As a result, the roller of the connector lock smoothes the upper surface of the operation unit.
The connector lock and the upper surface of the operation unit do not wear out.

[Brief description of the drawings]

FIG. 1 is a partially broken side view showing a configuration of a drawer-type circuit breaker according to an embodiment of the present invention.

2 is a partially crushed side view showing a state in which a disconnection portion of the apparatus of FIG. 1 is closed.

FIG. 3 is an enlarged side view of a portion A in FIG. 1;

FIG. 4 is a view taken in the direction of arrow C in FIG. 3;

FIG. 5 is an enlarged side view of a portion B in FIG. 2;

FIG. 6 is a view taken in the direction of arrow D in FIG. 5;

FIG. 7 is a partially broken side view showing the configuration of a conventional drawer-type circuit breaker.

8 is a partially crushed side view showing a state in which a disconnection portion of the device in FIG. 7 is closed.

FIG. 9 is a side view showing the configuration of a different drawer-type circuit breaker of the related art.

10A is a view on arrow F of FIG. 9, and FIG.
EE sectional view of FIG.

[Explanation of symbols]

1: switchboard, 4: bogie, 5: operation section, 6: cutoff section, 9:
Disconnecting part, 13: fixed connector, 14: movable connector, 15: control line, 16: connector lock, 17: roller, 18: catch, 25: groove

Claims (2)

[Claims] 1. A disconnecting section on which a bogie on which an interrupting section and an operation section are mounted can be pulled out from the inside of the switchboard to a front side, and which is connected to and separated from a main circuit inside the switchboard by taking the bogie in and out of the bogie. An auxiliary circuit for controlling the shut-off unit and the operation unit is provided inside the bogie, and power is supplied to the auxiliary circuit from the switchboard side via a fixed connector and a movable connector that can be manually inserted and removed from each other. In the drawer-type circuit breaker, the fixed connector is fixed to the switchboard side and the movable connector is connected to the bogie via a flexible control line, and the connection between the movable connector and the fixed connector is made by the movable connector. After being inserted into the fixed connector, the fixed connector and the movable connector are The disconnection between the movable connector and the fixed connector is made by disengaging the stopper and then pulling the movable connector out of the fixed connector, so that the connector lock can be freely moved up and down below the fixed connector. A groove is formed in the upper part of the connector lock that fits with the stopper when the movable connector is engaged with the fixed connector. In the disconnected state of the disconnecting part, the connector lock is lowered and the side of the operating part on the depth side A drawer-type circuit breaker characterized in that, when the disconnecting portion is in a closed state, the groove is fitted into the stopper to raise the connector lock, and the lower portion of the connector lock rests on the upper surface of the operation portion. 2. The drawer-type circuit breaker according to claim 1, wherein a rotatable roller is provided below the connector lock.