KR101065850B1 - Earth leakage breaker having automatic return funtion - Google Patents

Abstract

The present invention provides a circuit breaker for shutting off the power supply due to an electric shock, lightning strike, noise, overcurrent, and short circuit caused by an electric leak. Re-energized the power at the breaker and prevented malfunctions during auto recovery by performing independent auto recovery function.
Earth leakage circuit breaker with automatic recovery function according to an embodiment of the present invention,
A base having a fixed contact,
A switch plate having a movable contact attached to and detached from the stationary contact;
A press plate for pressing the switch plate to contact the movable contact with the fixed contact;
A support plate mounted on the base,
A handle which is fixed to the support plate by a first shaft pin so as to be rotatable and supplies or cuts power to the load side according to the rotation direction;
A first rotating piece to which one side is rotatably fixed to the first shaft pin to which the handle is fixed, and a second rotating piece to be rotatably fixed to the second shaft pin to be fixed to the other side of the first rotating piece and interlocked when the handle is rotated;
A pressing member which is rotatably fixed to the third shaft pin fixed to the second rotating piece and presses the pressing plate according to the rotation of the handle to press the switch plate;
A locking jaw in which the pressure member is seated is formed, and an operation plate for releasing the pressure state of the pressure member during rotation;
A sensing unit which releases the pressurized state by rotating the pressurizing member by pulling the operation plate by reversing the operation pin inserted in the trip coil so as to cut off the current supplied to the load side when detecting the leakage current;
A solenoid mounted on the base and pressurizing the second shaft pin by a plunger driven when a current is supplied to rotate the handle to restore the initial position;
A lid removably mounted to the base.

Description

Earth leakage breaker having automatic return funtion

The present invention relates to an earth leakage circuit breaker having an automatic recovery function. In particular, the earth leakage circuit breaker to shut off the power supply due to an electric shock, lightning strike, noise, overcurrent, and short circuit caused by an electric leak, the current leakage, lightning strike, noise and malfunction In the case of the circuit breaker, the circuit breaker is equipped with an automatic recovery function capable of minimizing maintenance costs and maintaining a continuous operating state of the system as the power is automatically detected and the power is applied again by the circuit breaker.

In general, an earth leakage circuit breaker installs an image current transformer and a blocking mechanism between a power line and a load (eg, an electrical appliance), and detects a current difference detected by the image current transformer in an abnormal current detector to generate an abnormal current. In this case, by blocking the power supply to the load by operating the blocking mechanism to protect the load.

On the other hand, when a malfunction occurs due to an intermittent short circuit, surge, noise, or the like, there is an inconvenience in that the user manually operates the shutoff lever when energizing. In view of this, a self-healing earth leakage breaker has been applied. That is, when an overload occurs in the electrical appliance, the power supply to the electrical appliance is cut off through the circuit breaker of the earth leakage breaker, and after a certain period of time, the shutoff lever is forcibly turned on due to the operation of the recovery device. The inconvenience of manipulating the blocking lever by manual has been eliminated.

Patent No. 10-470435 discloses an automatic return device for an earth leakage breaker operation knob. The above-described automatic return device for the earth leakage breaker operation knob includes an operation knob 14 which is built in the state protruding from the housing 11 and rotates about the rotation axis 13 to the center point by external power, and the operation knob 14 of the operation knob 14. As a ground fault circuit breaker configured to open and close a pair of contact switches 16 formed on the bottom surface of the housing 11 by using the trip bar 15 hingedly coupled to the lower side,

On the side of the operation knob 14, the rotating lever 22, which is rotatable along the auxiliary shaft 21, and the solenoid valve 25 acting according to an electrical signal are mounted, and the solenoid on one side of the rotating lever 22. At least one drive link 23 hingedly connected to the plunger 25a of the valve 25 is hingedly connected, and the operation knob 14 and the trip bar 15 are provided at the other side of the rotation lever 22. At least one driven link 24, which is hingedly connected, is hingedly connected.

The automatic return device for the earth leakage breaker operating knob as described above returns the earth leakage breaker 10 to ON by contacting the contact switch 16 as a current is applied to the solenoid valve 25. The device comprises at least one drive link 23 hinged to the plunger 25a, a pivoting lever 22 hinged to the drive link 23, and at least one driven link hinged to the pivoting lever 22. 24 is provided.

That is, the automatic return device of the operation knob installed between the operation knob 14 and the plunger 25a is made of a plurality of links to perform the link movement. As a result, when the earth leakage breaker 10 is turned off by separating the contact switch 16 due to a momentary occurrence of an abnormal current, the reaction time due to the link movement of the return device is delayed, so that the power is not cut off quickly. There is a problem that the reliability of the operation of the earth leakage breaker is poor.

In addition, the cost and manufacturing cost increase due to the increase in the number of parts constituting the operation knob automatic return device, and if the return device is made up of a plurality of links and there is not enough space for their smooth link movement, they are short-circuited. There is a problem that cannot operate smoothly within the limited space in the breaker case.

In addition, Korean Patent Publication No. 10-718530 discloses an earth leakage breaker having an automatic recovery means. The earth leakage breaker having the above-mentioned automatic recovery means includes a switch plate having a movable contact formed thereon, a pressing plate which presses the switch plate to contact the movable contact with the fixed contact point, and a support plate rotated by a shaft pin. A handle for cutting off or restoring the power supply to the load according to the rotational state, a pressing member coupled to the handle and pressing the pressing plate to press the switch plate as the handle rotates, and a locking jaw to which the pressing member is formed. A leakage circuit comprising an operating plate and a sensing unit which detects a leakage current or an overcurrent and pulls the operating plate to release the pressing member from the latching jaw, thereby releasing the pressing state of the pressing member to block current flow to the load. In circuit breaker,

The teeth formed on the steering wheel,

A solenoid that generates an electromagnetic force when a current is applied,

A driving pin partially inserted into the hollow inside the solenoid and moving forward or backward by the electromagnetic force of the solenoid;

A tooth is formed at one end, and the other end is coupled to the driving pin and the latch gear rotates through the shaft pin as the driving pin moves forward or backward,

Gears coupled to the teeth of the latch gear and the teeth of the handle is formed on the outer periphery and includes an automatic recovery means that is formed as an intermediate gear to rotate the handle in a recovery state in conjunction with the rotation of the latch gear by rotating through the shaft pin.

The earth leakage circuit breaker having the automatic recovery means as described above can minimize the structural change of the general earth leakage circuit breaker, thereby increasing the reliability of the operation, while the linear motion of the plunger is connected to the plunger when the solenoid is powered. The intermediate gears are converted into rotational motion through the teeth formed in the handle.

At this time, one side of the gear unit is connected to the plunger hinged, and the reaction speed is slowed due to the backlash generated in each gear during the driving of the recovery means consisting of several gears does not achieve a smooth operation. Therefore, when a transient abnormal current occurs due to an over-leakage on the load side, it cuts off and restores the power supplied to the load side, and thus has a problem in that the utility and reliability of the operation of the earth leakage breaker are inferior.

Embodiment of the present invention, since the circuit breaker for interrupting the current by the earth leakage breaker, and the parts of the recovery device (refering to the solenoid) to restore the breaker is mounted so as to operate independently, the instantaneous abnormal current caused by a short circuit, etc. It is related to an earth leakage breaker equipped with an automatic recovery function to quickly cut off the power supplied to the load side, thereby making it reliable in operation.

Embodiment of the present invention, by reducing the cost structure and assembly process by compact structure of the device to cut off or restore the power by the circuit breaker, they work smoothly without the space limitation in the case of the circuit breaker It is related to an earth leakage breaker equipped with an automatic recovery function.

Earth leakage circuit breaker with automatic recovery function according to an embodiment of the present invention,

A base having a fixed contact,

A switch plate having a movable contact attached to and detached from the stationary contact;

A press plate for pressing the switch plate to contact the movable contact with the fixed contact;

A support plate mounted on the base,

A handle which is fixed to the support plate by a first shaft pin so as to be rotatable and supplies or cuts power to the load side according to the rotation direction;

A first rotating piece to which one side is rotatably fixed to the first shaft pin to which the handle is fixed, and a second rotating piece to be rotatably fixed to the second shaft pin to be fixed to the other side of the first rotating piece and interlocked when the handle is rotated;

A pressing member which is rotatably fixed to the third shaft pin fixed to the second rotating piece and presses the pressing plate according to the rotation of the handle to press the switch plate;

A locking jaw in which the pressure member is seated is formed, and an operation plate for releasing the pressure state of the pressure member during rotation;

A sensing unit which releases the pressurized state by rotating the pressurizing member by pulling the operation plate by reversing the operation pin inserted in the trip coil so as to cut off the current supplied to the load side when detecting the leakage current;

A solenoid mounted on the base and pressurizing the second shaft pin by a plunger driven when a current is supplied to rotate the handle to restore the initial position;

A lid removably mounted to the base.

According to a more preferred embodiment, when the power supply is interrupted or restored according to the rotation direction of the handle described above, the pressing piece of the plunger for pressing the second shaft pin is always kept spaced apart from the second shaft pin by the elastic member. do.

The plunger described above is mounted to the base to be driven in the same direction as the rotational direction of the handle.

An earth leakage breaker equipped with an automatic recovery function according to an embodiment of the present invention configured as described above has the following advantages.

The breaker that cuts off the power by the earth leakage breaker and the parts of the recovery device (refering to solenoid) that recover the breaker are arranged to operate independently without mutual interference, thus preventing malfunctions during automatic recovery and Since the power supply to the load side is cut off quickly against the abnormal current, it has reliability and practicality for system operation.

In addition, the cost saving and manufacturing costs are reduced due to the simple structure of the device which cuts off or restores the power by the circuit breaker, and the work process for assembling them is shortened. It can work smoothly without any restrictions.

1 is a perspective view of a cover coupled in the earth leakage breaker with automatic recovery function according to an embodiment of the present invention,
2 is a perspective view of a cover removed from the circuit breaker with automatic recovery function according to an embodiment of the present invention,
Figure 3 is an exploded perspective view of the main portion of the earth leakage breaker equipped with an automatic recovery function according to an embodiment of the present invention,
4 (a, b) is a plan view showing the interruption and recovery of the power supply to the load side in the earth leakage breaker with automatic recovery function according to an embodiment of the present invention,
5 (a, b) is a cross-sectional view showing the interruption and recovery of the power supply to the load side in the earth leakage breaker with automatic recovery function according to an embodiment of the present invention.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings, which is intended to explain in detail enough to enable those skilled in the art to easily practice the present invention. It is not intended that the technical spirit and scope of the invention be limited.

1 to 5 (a, b) the earth leakage breaker with an automatic recovery function according to an embodiment of the present invention,

A base 51 on which the fixed contact point 50 is formed,

A switch plate 53 on which the movable contact 52 detachable from the fixed contact point 50 is formed,

A pressing plate 54 for pressing the switch plate 53 to bring the movable contact 52 into contact with the fixed contact point 50;

A support plate 55 mounted on the base 51,

A handle 57 which is fixed to the support plate 55 by a first shaft pin 56 so as to be rotatable, and supplies or cuts power to a load (for example, an electric product) side according to the rotation direction;

Rotating to the first pivot piece 58, one side of which is rotatably fixed to the first shaft pin 56 on which the handle 57 is fixed, and the second shaft pin 59, which is fixed to the other side of the first pivot piece 58. A second pivot piece 60, which is fixedly possible and is interlocked when the handle 57 pivots,

A pressing member which is rotatably fixed to the third shaft pin 61 fixed to the second pivoting piece 60 and presses the pressing plate 54 according to the rotation of the handle 57 so that the switch plate 53 is pressed; 62),

A locking jaw 63 in which the pressure member 62 is seated is formed, and an operation plate 64 for releasing the pressurization state of the pressure member 62 during rotation by the reverse of the operation pin 66;

In order to cut off the power supplied to the load side when detecting the leakage current, the operation plate 64 is pulled by the operation pin 66 retracted by the trip coil 65 to rotate the pressure member 62 to maintain the pressure state. A detection unit 67 for releasing,

A solenoid 69 mounted on the base 51 and pressurizing the second shaft pin 59 by the plunger 68 driven when the current is supplied to rotate the handle 57 to return to the initial position;

A cover 70 detachably mounted to the base 51.

When the power supply is cut off or restored according to the rotational direction of the handle 57 described above, the pressing piece 71 of the plunger 68 for pressing the second shaft pin 59 is an elastic member (referring to the compression coil spring) ( 72 is always kept spaced apart from the second shaft pin (59).

The plunger 68 described above is mounted to the base 51 to be driven in the same direction as the rotational direction of the handle 57.

As described above, the sensing unit 67 rotates the operation plate 64 by reversing the operation pin 66 according to the image current transformer 73 for detecting the leakage current and the leakage current detection signal from the image current transformer. The trip coil 65 for releasing the pressurized state of the 62 and the pressurized state of the pressurizing member 62 are released as the operating plate 64 is bent due to an inflection caused by an elevated temperature or more when an overcurrent occurs. The bimetal 74 may be included.

Hereinafter, an example of an earth leakage breaker equipped with an automatic recovery function according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

As shown in Figs. 4A and 5A, the case where the power supplied to the load side is cut off due to the occurrence of an abnormal current will be described (indicated that the circuit breaker is switched off). When a leakage current or an overcurrent occurs, the detection unit 67 detects this. That is, since the detection signal is applied to the trip coil 65 as the current transformer 73 detects a current leakage, the operation plate 64 is moved rearward (a direction away from the handle 57) by the operation pin 66 backward. Pulls).

As a result, since the pressing state of the pressing member 62 seated on the engaging jaw 63 of the operation plate 64 is released, the elastic restoring force of the elastic member (compression coil spring) 75 mounted below the pressing plate 54. As a result, the pressing plate 54 is lifted upward. Accordingly, since the movable contact 52 of the switch plate 53 is separated from the fixed contact 50, the power supplied to the load side can be cut off. At this time, the handle 57 is restored to the initial position by the elastic restoring force of the elastic member (torsion spring) 76.

4 (b) and 5 (b), after the power supply to the load side is cut off by the earth leakage breaker, a case in which power is supplied to the load side by restoring the earth leakage breaker handle to an initial state will be described. Breaker on state). When a current is applied to the solenoid 69 from the controller (not shown), an electromagnetic force is generated instantaneously, so that the plunger 68 is driven to press the second shaft pin 59.

For this reason, the handle 57 and the 1st rotating piece 58 are rotated counterclockwise centering on the 1st axial pin 56 mentioned above. At the same time, since the second pivoting piece 60 connected to the first pivoting piece 58 by the second shaft pin 59 is pressed downward, the pressing member 62 is pivotally fixed to the third shaft pin 61. Will be pressed. That is, since the pressing member 62 is pressed downward, one end is seated on the press jaw 63 of the operation plate 64 and the other end presses the pressing plate 54 downward (at this time, the elastic member 75 is Compression force). Therefore, since the movable contact 52 of the switch plate 53 is brought into contact with the stationary contact 50 by the pressing plate 54, the power supply supplied to the load side can be restored.

On the other hand, when the operation plate 64 is rotated to the rear by the operation pin 66, the pressing member 62 is released to the engaging jaw 63 of the operation plate 64 and the pressing force to press the pressing plate 54 is released The movable contact 52 is separated from the stationary contact 50 by the 1st operation | movement which becomes, and the 2nd operation | movement which the pressing force of the pressing plate 54 which pressed the switch board 53 is released. As a result, the earth leakage breaker handle 57 can be quickly switched to the off state. In addition, a mechanism configuration that cuts off power by an earth leakage breaker is driven independently without interference from the solenoid 69 (that is, the pressing piece of the plunger 68 when the handle 57 is switched to the initial position or the recovery position). (71) is always spaced apart from the second shaft pin (59).

Therefore, when an abnormal current or an overcurrent occurs, the handle 57 of the earth leakage breaker is quickly switched to the off state without being affected by the solenoid 69, so that the power supplied to the load side can be cut off quickly.

As described above, according to the earth leakage breaker equipped with the automatic recovery function according to the embodiment of the present invention, the interruption device for interrupting power by the earth leakage breaker and the parts (referring to solenoids) of the recovery device for recovering the breaker interfere with each other. Since it is arranged to operate independently, it prevents malfunction during automatic recovery, and can quickly cut off the power supplied to the load side against instantaneous abnormal current caused by a short circuit. The compact structure of the circuit breaker breaker and recovery device can reduce the cost and manufacturing cost, shorten the work process of assembling them, and they can operate smoothly in the limited space in the circuit breaker case.

50; Fixed contact
52; Movable Contact
54; Pressure plate
56; 1st shaft pin
58; First flight
60; 2nd East
62; Pressure member
64; Working plate
66; Working pin
68; plunger
70; cover
72; Elastic member
74; Bimetal

Claims (3)

A base having a fixed contact,
A switch plate having a movable contact detachable from the fixed contact;
A pressing plate for pressing the switch plate to contact the movable contact with the fixed contact point;
A support plate mounted to the base,
A handle which is fixed to the support plate by a first shaft pin so as to be rotatable and supplies or cuts power to the load side according to the rotation direction;
A first pivot piece, one side of which is rotatably fixed to the first shaft pin to which the handle is fixed, a second pivot piece that is rotatably fixed to the second shaft pin that is fixed to the other side of the first pivot piece, and interlocked when the handle pivots;
A pressing member which is rotatably fixed to the third shaft pin fixed to the second rotating piece and presses the pressing plate according to the rotation of the handle to press the switch plate;
A locking jaw in which the pressing member is seated, and an operation plate for releasing the pressing state of the pressing member during rotation;
A sensing unit which releases the pressurized state by rotating the pressurizing member by pulling the operation plate by reversing the operation pin inserted in the trip coil so as to cut off the current supplied to the load side when detecting the leakage current;
A solenoid mounted on the base and pressurizing the second shaft pin by a plunger driven when a current is supplied to rotate the handle to restore the initial position;
An earth leakage breaker with an automatic recovery function, characterized in that it comprises a cover detachably mounted to the base. The method of claim 1, wherein when the power supply is cut off or restored according to the rotation direction of the handle, the pressing piece of the plunger for pressing the second shaft pin is always kept spaced apart from the second shaft pin by the elastic member. Earth leakage breaker with automatic recovery function characterized in that. The earth leakage breaker according to claim 1 or 2, wherein the plunger is mounted on the base to be driven in the same direction as the rotation direction of the handle.

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