KR20220167507A - Handle driving apparatus for a leakage breaker with automatic recovery function - Google Patents

Abstract

The present invention relates to a handle driving apparatus for a leakage breaker with automatic recovery function. The handle driving apparatus comprises: a handle configured to be linked to a leakage trip apparatus and rotated and moved, and configured to control an electric contact between an operator and a stator by rotation and movement; a connecting lever connecting a plunger and a handle of a recovery solenoid, and having a first end rotatably connected to a rotation shaft of the handle and a second end fixed on an upper end of the plunger of the recovery solenoid, and configured to rotate and move the handle by being linked to the movement of the recovery solenoid; and a crossbar link member having one side coupled to a crossbar pressing the operator and fixed on the handle. The handle includes a lever guide slot having a length corresponding to an operation range of the connecting lever. The connecting lever is arranged to penetrate a lever guide slot of the handle and is linked to the movement of the plunger to be vertically moved within the lever guide slot. Therefore, the driving speed of a handle can be improved.

Description

Handle driving apparatus for a leakage breaker with automatic recovery function}

The present invention relates to an earth leakage breaker for automatic recovery, and more particularly, by changing the structure of a connecting lever connecting an automatic recovery device and a handle of an earth leakage breaker configured to automatically recover after being cut off by an earth leakage, etc. A handle driving device for a self-recovering earth leakage breaker configured so that a solenoid drives a handle only when restoring and does not affect the driving of the handle when breaking an earth leakage, so that the handle can be quickly rotated and moved when earth leakage is cut off.

An earth leakage breaker is provided between a power source side and a load side, and is a device for preventing accidents such as electric shock or fire due to electrical leakage by automatically cutting off a power path in case of an electric leakage. In particular, the earth leakage breaker blocks the flow of current to the earth leakage breaker when an abnormal current occurs on the load side due to a cause such as a leakage or a short circuit, or when an instantaneous high power flows in due to an external cause such as lightning or a surge on the power side. Safety accidents and equipment damage that may be caused by current are prevented in advance.

A conventional earth leakage breaker includes a housing, a switch device that has a handle protruding from one side of the housing to manually or automatically perform an on/off operation, and is connected to the switch device to conduct current flow between the power source side and the load side. and a contact unit for blocking, a trip device for forcibly blocking the flow of current in the contact unit, a recovery device and a control circuit configured to automatically restore the original state after a cut-off state.

The trip device includes an earth leakage trip means and an instantaneous trip means. The earth leakage trip means blocks current flow in the contact means when an abnormal current is generated due to an internal factor such as an electric leakage or a short circuit occurring on the load side, and instantaneous trip When instantaneous high power is introduced by an external factor such as lightning strike or surge, the current flow of the contact means is blocked.

The contact unit includes a stator, a mover, and a crossbar coupled to the mover and configured to press the mover, the stator electrically connected to an input terminal and the mover electrically connected to an output terminal, and the crossbar attached to one end of the switchgear. fixedly coupled. The crossbar is moved up and down by the driving of the opening and closing device, and as a result, the mover moves up and down to electrically contact or separate from the stator. When the mover contacts the stator, the earth leakage breaker circuit forms a closed circuit so that the power side and the load side are energized.

The opening/closing device includes a handle serving as a manually or automatically operated switch, and a link member connecting the crossbar of the contact unit and the handle. As the handle is automatically driven by the earth leakage tripping device or driven by manual operation, the earth leakage breaker is cut off or brought into a normal state.

Meanwhile, the control unit of the earth leakage breaker determines the cause of the trip when the power supply is cut off, and when the cause is resolved, the circuit breaker is automatically restored by driving an automatic recovery device. The recovery device may be composed of a recovery solenoid including a coil, a plunger, and a spring, and the plunger may be raised and lowered when current flows into the coil under the control of a control circuit unit.

Meanwhile, in the conventional earth leakage breaker, a link means for connecting the plunger of the recovery device and the handle of the opening/closing device is provided. In this way, by connecting the handle of the opening/closing device and the plunger of the recovery solenoid through the link means, the handle of the opening/closing device performs a rotational movement by a linear motion according to the ascending and descending movement of the plunger. Therefore, when current is applied to the coil of the recovery solenoid in order to restore the ground leakage breaker that has been blocked, the plunge is lowered, one end of the link means connected to the plunge is lowered together, and the switchgear connected to the other end of the link means is lowered. As the handle rotates, the opening and closing device presses the crossbar to bring the mover and stator into contact, thereby restoring the earth leakage breaker.

On the other hand, the aforementioned conventional earth leakage breaker is constructed so that the handle is operated integrally with the link means, and the link means is configured to operate integrally with the plunger of the recovery solenoid. Due to this structure, when leakage current is generated and the earth leakage breaker is tripped, the handle of the switchgear must be rotated together with the integrally connected link means. Therefore, when an earth leakage occurs, since the link means connected to the plunger has to be rotated together with the handle, a problem arises in that more time is required than the rated time required for breaking the earth leakage breaker.

Korean Registered Patent No. 10-1062313 Korean Registered Patent No. 10-1813148 Korean Registered Patent No. 10-1452839

An object of the present invention to solve the above problems is to provide a handle driving device of an automatic recovery earth leakage breaker capable of transitioning a handle connected to an automatic recovery device to a cut-off state within a faster time when tripped.

The feature of the handle driving device of the self-recovery earth leakage breaker according to the present invention for solving the above problems is a contact portion including a mover and a stator configured to be connected to a power side and a load side, respectively, and a crossbar for pressing the mover; A switch device configured to switch the contact unit, an automatic recovery device configured of a recovery solenoid, an earth leakage trip device that drives the switch device in response to an electric leakage, and a control unit to prevent electrical contact between the mover and the stator of the contact unit according to an electric leakage occurrence. It relates to a handle driving device for a self-recovery earth leakage breaker, which is configured to rotate in conjunction with an earth leakage tripping device, and a crossbar attached to a mover is connected to one end to prevent electrical contact between a mover and a stator by rotation. a handle configured to control; As a lever connecting the plunger of the recovery solenoid and the handle, a first stage is rotatably connected to the rotating shaft of the handle and a second stage is fixedly connected to the upper end of the plunger of the recovery solenoid, interlocking with the movement of the plunger of the recovery solenoid. a connecting lever configured to rotate and move the handle; and a crossbar link member fixed to the handle with a crossbar for pressing the mover coupled to one side thereof,

The handle has a lever guide slot having a length corresponding to the movable range of the connecting lever on a surface opposite to the plunger of the recovery solenoid, and the connecting lever is disposed such that a body passes through the lever guide slot of the handle to provide a movement of the plunger. It is characterized in that it moves up and down in the lever guide slot in conjunction with the movement.

In the handle driving device of the self-recovery type earth leakage breaker of the present invention according to the above-mentioned features, the connecting lever has a bent portion on the body, and the upper and lower regions of the bent portion of the connecting lever are respectively upper ends of the lever guide slots. And preferably made of a shape that is seated at the bottom.

In the handle driving device of the self-recovering type earth leakage breaker of the present invention according to the above-mentioned features, it is preferable that the crossbar link member is fixedly mounted in the lower region of the lever guide slot in the handle.

In the handle driving device of the self-recovery earth leakage breaker of the present invention according to the above features, it is preferable that the movable range of the connecting lever corresponds to the up-and-down movement range of the plunger of the recovery solenoid.

In the handle driving device of the self-recovery earth leakage breaker according to the present invention having the above configuration, the connecting lever is restored by changing the structure of the connecting lever connecting the handle and the plunger of the recovery solenoid and placing it in the lever guide slot of the handle. It is interlocked only with the plunger of the solenoid and does not affect the operation of the handle. Thus, when the earth leakage breaker is cut off by tripping, the connecting lever connected to the plunger does not affect the rotational movement of the handle, so that the driving speed of the handle can be improved.

1 is a perspective view showing a handle driving device of an automatic recovery type earth leakage breaker according to a preferred embodiment of the present invention, and FIG. 2 is an exploded perspective view of the handle driving device.
3 is a perspective view of an earth leakage breaker and a handle driving device in an initial switch-off state in an automatic recovery type earth leakage breaker equipped with a handle driving device according to the present invention, and FIG. 4 is a cross-sectional view in the AA direction.
5 is a perspective view of an earth leakage breaker and a handle driving device in a switch-on state, which is an energized state by a recovery function, in an automatic recovery type earth leakage breaker equipped with a handle driving device according to the present invention, and FIG. 6 is in the BB direction is a cross-section of
7 is an automatic recovery type earth leakage breaker equipped with a handle driving device according to the present invention, in which the plunger is restored to an initial state after an energized state by a recovery function or in an energized switch-on state by manual manipulation of the handle are perspective views of the earth leakage breaker and the handle drive device of , and FIG. 8 is a cross-sectional view in the CC direction.
9 is a perspective view of an earth leakage breaker and a handle driving device in a switch-off state blocked by an abnormal current in an automatic recovery type earth leakage breaker equipped with a handle driving device according to the present invention, and FIG. 10 is in a DD direction is a cross-section of

Hereinafter, the structure and operation of the handle driving device of the self-recovery earth leakage breaker according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

A typical self-recovery earth leakage breaker includes a contact portion including a mover and a stator configured to be connected to a power side and a load side, respectively, a switchgear for switching the contact portion, a recovery device composed of a recovery solenoid, and driving the switch according to the occurrence of an electric leakage. Provided with an earth leakage tripping device to control the electrical contact between the mover and stator of the contact part according to the occurrence of a leakage, electrically separating the power side and the load side to maintain the cut off state, or electrically connecting the power side and the load side to maintain or block the normal state state can be restored to a normal state.

The handle driving device of the self-recovery earth leakage breaker according to the present invention improves the structure connecting the switch and the recovery solenoid, so that the handle of the switch can quickly transition from the normal or recovery state to the shut-off state when an electric leakage occurs. characterized by

1 is a perspective view showing a handle driving device of an automatic recovery type earth leakage breaker according to a preferred embodiment of the present invention, and FIG. 2 is an exploded perspective view of the handle driving device.

Referring to Figures 1 and 2, the handle driving device 10 according to the present invention is a handle 100 mounted on a rotating shaft 102, the first end is connected to the rotating shaft 102 of the handle, and the second end is restored It has a connecting lever 110 connected to the top of the plunger of the solenoid, and a crossbar link member 120 mounted to the bottom of the handle.

The crossbar link member 120 is a member that connects the crossbar coupled to the movable contact of the contact part of the earth leakage breaker and the handle. One end is fixedly mounted on the lower end of the handle and the other end is fixedly connected to the crossbar for pressing the mover. Accordingly, as the handle rotates, the crossbar link member mounted on the lower end of the handle moves, and the crossbar mounted on the crossbar link member presses the mover due to the movement of the crossbar link member.

The handle 100 is configured to rotate in the left and right directions in conjunction with an earth leakage tripping device, and a crossbar that presses the mover is connected to the lower end to control electrical contact between the mover and the stator by left and right rotation when an electric leakage occurs. . The handle 100 has a lever guide slot 104 on the surface opposite the plunger of the recovery solenoid, and the body of the connecting lever is disposed to penetrate the lever guide slot of the handle. Preferably, the lever guide slot has a length corresponding to a movable range of the connecting lever.

In the connecting lever 110, the first end of the body is rotatably connected to the rotating shaft of the handle and the second end of the body is fixedly connected to the upper end of the plunger of the recovery solenoid, interlocked with the movement of the plunger, in the lever guide slot. is moved in the up-down direction.

The connecting lever has a bent portion 112 on a body, and upper and lower regions of the bent portion of the connecting lever are configured to be seated at upper and lower ends of the lever guide slot, respectively. Since one end of the connecting lever is fixedly connected to the upper end of the plunger of the recovery solenoid, the movable range of the connecting lever corresponds to the vertical movement range of the plunger.

The second stage of the connecting lever is fixedly connected to the top of the plunger of the recovery solenoid and the second stage is connected to the rotating shaft of the handle and disposed in the lever guide slot, so that it moves in conjunction with the movement of the plunger and is not affected by the movement of the handle. don't Therefore, when the earth leakage breaker performs a recovery operation, when the plunger descends, the connecting rubber also descends, and the handle connected to the connecting lever rotates to be restored. Meanwhile, when the earth leakage breaker performs a blocking operation, the connecting lever maintains its original state without movement even if the handle rotates.

Hereinafter, with reference to the drawings, operations for each state of the self-recovery earth leakage breaker equipped with the handle drive device 10 according to the present invention will be described in detail.

<Initial state: switch off state>

3 is a perspective view of an earth leakage breaker and a handle driving device in an initial switch-off state in an automatic recovery type earth leakage breaker equipped with a handle driving device according to the present invention, and FIG. 4 is a cross-sectional view in the A-A direction.

Referring to FIGS. 3 and 4 , in the initial state, the handle is rotated in a state in which the crossbar is not pressed, and since the crossbar is not pressed, the switch-off state in which the contact point between the mover and the stator is separated is maintained. Also, the plunger of the recovery solenoid also maintains its initial raised state separated from the coil.

< Power state by recovery function: switch on state >

5 is a perspective view of an earth leakage breaker and a handle driving device in a switch-on state, which is an energized state by a recovery function, in an automatic recovery type earth leakage breaker equipped with a handle driving device according to the present invention, and FIG. 6 is a B-B direction is a cross-section of

The self-recovery earth leakage breaker according to the present invention performs a recovery operation using a recovery solenoid when the control unit does not detect an abnormal current after being blocked by an abnormal current.

Referring to FIGS. 5 and 6 , when instantaneous power is supplied to the coil of the recovery solenoid for a recovery operation, the plunger is pulled by an induced electromotive force, and accordingly the plunger is lowered. At this time, the second end of the connecting lever connected to the upper end of the plunger descends together with the plunger, and the lower end of the lever guide slot of the handle, on which the bent part of the body of the connecting lever is seated, moves downward along with the plunger. , which causes the handle to rotate in the direction of the recovery solenoid. As a result, the crossbar connected to the crossbar link member fixedly coupled to the lower region of the handle moves so that the mover descends in the direction of the stator, and as the mover and the stator come into contact with each other, the earth leakage breaker is restored. That is, during automatic recovery, the connecting lever interlocks with the rotating shaft of the handle to press and rotate the crossbar link member to perform automatic recovery.

< After energization by the recovery function, restoration of the initial state of the plunger of the recovery solenoid or energization by manual operation of the handle: switch on state >

7 is an automatic recovery type earth leakage breaker equipped with a handle driving device according to the present invention, in which a plunger is restored to an initial state after an energized state by a recovery function or an earth leakage breaker and a handle are driven in an energized state by manual manipulation of the handle These are perspective views of the device, and FIG. 8 is a cross-sectional view in the C-C direction.

Referring to FIGS. 7 and 8 , after the earth leakage breaker is brought into an energized state by the recovery function, when power supply to the coil of the recovery solenoid is stopped, the induced electromotive force by the coil disappears and The plunger and the connecting lever connected to the top of the plunger return to their original initial positions. At this time, while the handle is fixed, the connecting lever is moved until the upper region of the bent portion of the body touches the upper end of the lever guide slot of the handle.

< Blocking state by blocking solenoid: switch off (OFF) state >

9 is a perspective view of an earth leakage breaker and a handle driving device in a switch-off state blocked by an abnormal current in an automatic recovery type earth leakage breaker equipped with a handle driving device according to the present invention, and FIG. 10 is in a D-D direction is a cross-section of

9 and 10, when an abnormal current is detected and current is supplied to the coil of the blocking solenoid of the earth leakage trip device, an induced electromotive force is generated, and thus the plunger of the blocking solenoid is driven and the plunger of the blocking solenoid is powered. It is transmitted to the lower part of the handle and rotates the handle. As a result, the handle rotates in the direction of the blocking solenoid, and the crossbar rises through the crossbar link member connected to the handle to return to the initial state, and at the same time, the spring compressed by the mover recovers its elastic force so that the mover and the crossbar rises and returns to the initial state to become an open state, that is, a cut-off state.

At this time, the connecting lever disposed in the lever guide slot of the handle maintains its position without being affected by the rotational movement of the handle. Therefore, since the earth leakage breaker according to the present invention is configured so that the connecting lever connected to the handle is interlocked only with the movement of the plunger of the recovery solenoid, when the earth leakage breaker is cut off by the trip, the connecting lever connected to the plunger does not respond to the rotational movement of the handle. It does not have any influence, so it is possible to improve the driving speed of the handle.

Although the present invention has been described above with reference to preferred embodiments, this is only an example and does not limit the present invention, and those skilled in the art to which the present invention belongs will not deviate from the essential characteristics of the present invention. It will be appreciated that various modifications and applications not exemplified above are possible within the range. And, differences related to these variations and applications should be construed as being included in the scope of the present invention defined in the appended claims.

1: Self-recovery earth leakage breaker
10: handle driving device
102: axis of rotation
100: handle
104: lever guide slot
110: connecting lever
112: bending part
120: crossbar link member
20: contact part
200: mover
202: stator
204: crossbar
30: recovery solenoid
300: Coil
302: recovery spring
304: plunger

Claims (4)

A contact unit including a mover and a stator configured to be connected to the power side and the load side, respectively, and a crossbar configured to press the mover, a switch configured to switch the contact unit, an automatic recovery device configured of a recovery solenoid, and the switch according to the occurrence of a short circuit. A handle driving device for a self-recovery type earth leakage breaker having an earth leakage trip device and a control unit for driving an earth leakage circuit breaker to control electrical contact between a mover and a stator of a contact point according to occurrence of an earth leakage,
a handle configured to rotate in conjunction with the earth leakage trip device and to control electrical contact between the mover and the stator by rotationally connected to one end of a crossbar attached to the mover; and
As a lever connecting the plunger of the recovery solenoid and the handle, a first stage is rotatably connected to the rotating shaft of the handle and a second stage is fixedly connected to the upper end of the plunger of the recovery solenoid, interlocking with the movement of the plunger of the recovery solenoid. a connecting lever configured to rotate and move the handle; and
A crossbar link member fixedly mounted to the handle with a crossbar for pressing the mover coupled to one side;
The handle has a lever guide slot having a length corresponding to the movable range of the connecting lever on a surface opposite to the plunger of the recovery solenoid,
The connecting lever is disposed so that the body passes through the lever guide slot of the handle and moves up and down in the lever guide slot in conjunction with the movement of the plunger. The method of claim 1, wherein the connecting lever has a bent portion on the body,
The handle driving device of the self-recovery earth leakage breaker, characterized in that the upper region and the lower region of the bent portion of the connecting lever are configured to be seated at upper and lower ends of the lever guide slot, respectively. According to claim 2,
The handle driving device of the self-recovery earth leakage breaker, characterized in that the connecting lever interlocks with the rotating shaft of the handle to press and rotate the crossbar link member to perform automatic return. The handle driving device of an automatic recovery type earth leakage breaker according to claim 1, wherein the movable range of the connecting lever corresponds to the vertical movement range of the plunger of the recovery solenoid.

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