KR101813148B1 - Auto recovery type circuit breaker - Google Patents

Abstract

The present invention relates to an automatic recovery type circuit breaker. The automatic recovery type circuit breaker of the present invention comprises: a switching device (100) turning on or off power by operating a handle (30) and a toggle link (130) bound to the handle (30) and having a mover (50) come in contact with a stator (60) or separated from the stator (60); an instantaneous electrical short linkage trip device (200) detecting high current, overcurrent, and leakage current to separate the mover (50) from the stator (60); and an automatic recovery device (300) operating the handle (30) or the toggle link (130) to make the mover (50) contact the stator (60) after a predetermined time when the mover (50) is determined to be separated from the stator (60) due to the high current or malfunction. The present invention has a simplified structure in which a breaker and a recovery device are integrally configured, and thus when an error occurs, power can be promptly turned off, and when risk factors are removed by determining error causes, power can be automatically turned on, thereby obtaining excellent operation reliability and also being easily used in a communication repeater in need of automatic recovery or the like.

Description

{AUTO RECOVERY TYPE CIRCUIT BREAKER}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic restoration type earth leakage breaker, and more particularly, to an automatic restoration type circuit breaker having an automatic recovery function when a leakage breaker is tripped due to a one-time cause of a momentary inflow of a large current will be.

It is applied to mobile communication repeater, traffic control box, street light distribution box, distribution board, traffic control system, surge protector, various controllers and surveillance systems.

In general, the earth leakage breaker is installed between the power source side and the load side, and the current difference detected by the image current transformer is sensed by the abnormal current detection unit. When abnormal current is generated, The power supply is cut off.

However, if the power is cut off due to one-time cause such as overload, temporary short circuit other than short circuit, lightning, surge, etc., the existing earth leakage breaker can be restored by putting the management person directly on site, It is inefficient because of high maintenance cost.

In particular, recently, Korea's climate has gradually changed to a subtropical climate, and at the same time, the frequency of occurrence of lightning strikes in the rainy season in July of August has been extremely high. When the lightning strike falls around, the earth leakage circuit breakers Causing a malfunction and causing serious trouble such as the OFF of the earth leakage breaker (OFF).

In the field of mobile communication, a major loss may occur due to tripping of the earth leakage breaker (TRIP) caused by a lightning strike. Especially, in the case of a mobile communication repeater, communication is difficult while recovering, causing enormous economic loss.

In order to solve the above-mentioned inefficient situation, an automatic restoration circuit breaker such as the Korean Patent Registration No. 0740996 has been developed.

The automatic restoration circuit breaker includes a driving motor for moving the arm and the arm to the left and right in a body separately attached to the side of the earth leakage breaker, and the handle is hooked on the arm so that the handle is pushed and rotated according to the left- .

However, in the conventional automatic restoration circuit breaker, since the arm and the driving motor can not operate smoothly in the limited space in the breaker main body, the breaker having the body for installing the drive motor and the arm separately on the side of the breaker main body, The structure is bulky, the operation structure is complicated, and the manufacturing cost is high.

In addition, since the conventional automatic restoration circuit breaker operates the interrupting and automatic restoration function by connecting several gears in order to minimize the structural change of the conventional earth leakage circuit breaker, it is difficult to cut off the power quickly due to a short reaction time have.

Patent Document 1: Korean Patent Registration No. 0740996 (registered on Jul. 12, 2007)

An object of the present invention is to provide an automatic restoring type circuit breaker integrated with an automatic restoring device in a circuit breaker body so that the structure of the automatic restoring device can be simplified so that the automatic restoring device can smoothly operate without being limited by space within the circuit breaker main body.

It is another object of the present invention to provide an automatic recovery type leakage current detection circuit which real time detection of an automatic recovery method through an actual leakage current detection circuit on the load side, Circuit breaker.

According to an aspect of the present invention, there is provided a switching device including a handle and a toggle link coupled to the handle to turn on and off a mover by contacting or separating the mover with the stator, Wherein the controller is operable to operate the steering wheel or the toggle link after a set time if it is determined that the mover is disconnected from the stator due to the large current or malfunction, And an automatic recovery device for bringing the mover into contact with the stator.

Wherein the switching device comprises a crossbar to which the mover is coupled and a pressing member for pressing the mover to contact the mover with the stator, one side connected to the handle and the other side connected to the pressing member, And a restoring member that provides an elastic force to push up the crossbar so that the mover is separated from the stator when a force pressing the crossbar against the pressing member is removed.

Wherein the instantaneous-leakage interrupted trip device has a latching portion for pressing one end of the pressing member, and when the other end is rotated about the rotation pin, the pressing member is released from the latching portion so that the pressing force of the pressing member against the crossbar is removed The trip bar is operated when the trip bar is turned on around the rotation pin, and the bimetal is operated when the trip bar is rotated around the rotation pin, so that the trip bar is rotated around the rotation pin, And a trip solenoid that is operated when the image current transformer outputs a leakage current signal to cause the trip bar to rotate around the rotation pin.

The upper portion of the bimetal is provided so as to correspond to the other end of the trip bar. When the overcurrent flows into the bimetal, the upper portion of the bimetal is bent toward the trip bar, and pushes the other end of the trip bar to rotate the trip bar around the rotation pin.

The amateur is installed at one end of the trip bar and is magnetized when a large current flows into the arm so that the instantaneous action trigger bar pushes one side of the trip bar to rotate the trip bar about the rotation pin.

Wherein the instantaneous operation trigger bar is disposed at a position corresponding to the armature, the armature is magnetically attracted to the armature by a magnetic metal part, one side is connected to the magnetic metal part, and the other side is fitted to the trip bar, And a pushing bar for pushing one side of the tripping bar so that the tripping bar is rotated about the turning pin when the magnetic metal part is pulled by the armature.

The trip solenoid is disposed at a position corresponding to the other end of the trip bar and pulls the other end of the trip bar by a magnetic force so that the trip bar rotates about the rotation pin.

Wherein the automatic recovery device includes a rotation cam portion having one side coupled to the handle or the toggle link to allow the handle or the toggle link to operate by pivoting and a pinion gear provided on the opposite side, And a recovery solenoid which is provided with a recoil gear and is capable of ascending and descending in a support body and pulling down the plunger by a magnetic force when a power recovery signal is output from a plunger in an ascending or descending state in the support body in a power off state.

And a controller for determining whether the mover is disconnected from the stator due to the large current or malfunction and outputting the power recovery signal for automatic recovery.

If the number of automatic recovery times is equal to or greater than the preset number, the control unit stops the automatic recovery and transmits an automatic recovery stop signal to the manager or the management server.

The present invention has the effect of simplifying the structure of the automatic restoration type earth leakage breaker because the breaker body, the instantaneous-to-earth leakage interlock trip device, and the automatic recovery device are integrally formed with the circuit breaker and the recovery device.

In addition, the present invention detects the actual leakage current, the large current and the overcurrent on the load side to quickly cut off the power source, judge the cause of the power cutoff, and automatically recover the power source when the risk factor is eliminated. It is widely used in a wired / wireless communication service provider that needs automatic restoration, major facilities in the country, and has an effect of providing economic effects.

In addition, the automatic restoration apparatus of the present invention has an effect that the restoration solenoid is applied to operate the toggle link tied to the handle and the handle to perform automatic restoration, so that the breaker body can smoothly operate without being limited by the space.

1 is a perspective view showing an internal structure of an automatic restoration type earth leakage breaker according to an embodiment of the present invention;
2 is a sectional view showing an initial state (OFF) of an automatic restoration type earth leakage breaker according to an embodiment of the present invention;
3 is a sectional view showing an energized state (ON) of an automatic restoration type earth leakage breaker according to an embodiment of the present invention.
4 is a perspective view showing an instantaneous-leakage current communication trip device according to an embodiment of the present invention;
Fig. 5 is a view showing the operation of the instantaneous-leakage communication trip device in the initial state (OFF) and the energized state (ON) according to the embodiment of the present invention. Fig.
FIG. 6 is a diagram showing the operation of the instantaneous-leakage communication trip device in a short circuit trip (OFF) and an instantaneous trip (OFF) according to an embodiment of the present invention.
7 is a configuration view showing an operation of an automatic restoration type earth leakage breaker according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a perspective view showing an internal structure of an automatic restoration type earth leakage breaker according to an embodiment of the present invention. FIG. 2 is a sectional view showing an initial state (OFF) of an automatic restoration type earth leakage breaker according to an embodiment of the present invention. FIG. 3 is a cross-sectional view showing the ON state of the automatic restoration type circuit breaker according to the embodiment of the present invention, and FIG. 4 is a sectional view of the instantaneous- As shown in Fig.

1 to 3, the automatic restoration type circuit breaker of the present invention includes a switching device 100, an instantaneous-leakage interlocking trip device 200, and an automatic restoration device 300.

The automatic restoration type earth leakage breaker 1 (hereinafter, may be referred to as an "earth leakage breaker") includes a switching device 100, an instantaneous-leakage interlocking trip device 200 and an automatic restoration device 300 in the circuit breaker main body 10 It is a series of devices that can be configured as a single unit to perform power cut-off and automatic power recovery function. That is, the automatic restoration type earth leakage breaker 1 is an integrated device that combines a circuit breaker and a recovery device.

1, the circuit breaker main body 10 forms the lower appearance of the automatic restoration type earth leakage breaker 1, and has an internal space and an open top, so that the above devices for interruption and automatic restoration can be accommodated have.

The open top of the breaker body 10 is fitted with a cover 20 for shielding of the upper devices after they are received. The cover (20) is provided with an opening (21), and the handle (30) for manually turning the power on and off can be exposed to the outside. The cover 20 coupled to the circuit breaker body 10 can be firmly fixed to the circuit breaker body 10 by bolts or the like.

The cover 20 is provided with a test button 23 for testing the cut-off and automatic restoration operation of the earth leakage breaker 1 and has a select switch 25 for selecting the automatic mode and the manual mode, The display unit 27 may be provided.

The automatic mode is a mode in which the power cut-off and power restoration functions are automatically performed, and the manual mode is a mode that artificially manipulates the handle 30 to perform power cut-off and power recovery. The checking of the earth leakage breaker (1) is performed in the manual mode so that the power is not automatically restored after the power is turned off.

The display unit 27 may illuminate the green LED in the automatic mode, the green LED in the manual mode, and the red LED on the short circuit.

The handle 30 is rotatably supported on the support plate 40 by the rotary shaft 31 on both lower sides and is rotatable about the rotary shaft 31. The handle 30 is turned on / off according to the rotation direction.

The on / off of the power source is performed in such a manner that the mover 50 is contacted with or separated from the stator 60. The movable contact 51 of the mover 50 and the fixed contact 61 of the stator 60 are brought into contact or separated by the rotation of the handle 30 so that the power is turned on and off. When the movable contact 51 contacts the fixed contact 61, the power source side and the load side are connected, and the power source is turned on (ON) state where power is supplied to the load side.

The switching device 100 is connected to the handle 30 so that the movable contact 51 of the mover 50 contacts or separates from the fixed contact 61 of the stator 60 in accordance with the rotation of the handle 30.

2 and 3, the switching device 100 includes a crossbar 110, a pressing member 120, a toggle link 130, and a restoring member 140. As shown in FIG.

The cross bar 110 is formed in a U-shape with one side open at its side, and the mover 50 is disposed in a C-shaped intermediate space. The cross bar 110 presses the mover 50 to bring the movable contact 51 of the mover 50 into contact with the fixed contact 61 of the stator 60. [

The pressing member 120 presses the cross bar 110 in accordance with the rotation of the handle 30 so that the cross bar 110 presses the movable member 50. [ The pressing member 120 is connected to the toggle link 130 at a central portion in a shape having a predetermined length. One end of the pushing member 120 is disposed on the upper side of the cross bar 110 and the other end of the pushing member 120 is inclined upward in the direction of the trip bar 210 to be described later. And the other end is hooked on the latching portion 211 of the trip bar 210.

The toggle link 130 is engaged with the handle 30 and transmits the rotational force of the handle 30 to the mover 50. The toggle link 130 is connected to the handle 30 and the other end is connected to the pressing member 120 so that one end of the pressing member 120 pushes the cross bar 110 So that the movable contact 51 of the magnet 50 is brought into contact with the fixed contact 61 of the stator 60.

One end of the toggle link 130 is connected to the handle 30 by the upper link pin 131 and the other end is connected to the fixed plate 70 by the lower link pin 133. The stationary plate 70 is formed with a slot 71 through which the lower link pin 133 can move up and down. The toggle link 130 causes the pressing member 120 to press the crossbar 110 or release the pressed state as the lower link pin 133 moves up and down in the slot 71 by the rotation of the handle 30. [

The fixing plate 70 is a structure for installing the switching device 100 in the circuit breaker body 10 together with the above-described support plate 40. [

The restoring member 140 provides an elastic force to push the cross bar 110 upward so that the mover 50 is separated from the stator 60 when the pressing member 120 is removed from the force of pressing the cross bar 110. The restoring member 140 is disposed below the crossbar 110 so as to push up the crossbar 110. The restoring member 140 may be a compression coil spring.

The instantaneous-leakage current interrupting trip device 200 detects a large current, an overcurrent, a leakage current, and the like, and separates the mover 50 from the stator 60.

1, 2, and 4, the instantaneous-leakage interrupted trip device 200 is located at one side of the switching device 100 and includes a trip bar 210, a bimetal 230, an armature 240, A video current transformer 260, and a trip solenoid 270.

The trip bar 210 operates when a large current such as a lightning strike or a surge flows instantaneously, an overcurrent occurs due to an overload, or when a short circuit occurs.

The trip bar 210 is formed with a latching portion 211 for pressing one end of the pressing member 120. The other end of the tripping bar 210 is rotated around the rotation pin 213 to release the pressing member from the latching portion 211, 120 to remove the force of pressing the crossbar. The restoring member 140 pushes up the cross bar 110 so that the movable member 50 is separated from the stator 60 and the power supply can be shut off when the pressing member 120 is removed from the force of pressing the cross bar 110. Although not shown, the latching portion 211 may have a latching shape in which the other end of the pressing member 120 is hooked by elasticity.

4, the trip bar 210 extends obliquely in the lower vertical extension 215, the lower vertical extension 215, which extends upward from the pivot pin 213,

An inclined extension portion 216 formed with an opening 217 to which one side of the instantaneous operation trigger bar 250 is fitted, an intermediate vertical extension portion 218 extending vertically from the inclined extension portion 216, And a Y-shaped branch portion 219 branched to both sides of the branch portion 218.

At both ends of the branch portion 219, adjustment bolts 221, which can adjust the protruded lengths, are fastened.

The bimetal 230 is actuated when an overcurrent is applied to cause the trip bar 210 to rotate about the pivot pin 213. The bimetal 230 has a long plate shape with two kinds of thin metals superimposed on each other with the degree of thermal expansion, that is, the degree of expansion and contraction according to the change in temperature. The lower part is supported by the armature 240, 210, respectively.

The bimetal 230 pushes the other end of the trip bar 210 while the upper part of the bimetal 230 is bent in the direction of the trip bar 210 so that the trip bar 210 is rotated around the rotation pin 213.

The armature 240 is actuated upon high current input to cause the trip bar 210 to rotate about the pivot pin 213.

The armature 240 is disposed on one side of the trip bar 210 on both sides. The amateur 240 is magnetized when a large current flows therein, so that the instantaneous action trigger bar 250 pushes one side of the trip bar 210 to cause the trip bar 210 to rotate around the rotation pin 213.

The instantaneous operation trigger bar 250 includes a magnetic metal part 251 spaced apart from the armature 240 and one end connected to the magnetic metal part 251 and the other end inserted into the trip bar 210 And a pushing bar 253. The pushing bar 253 is disposed in the open hole 217 of the trip bar 210 from the bottom to the top.

The magnetic metal part 251 is attracted to the armature 240 when the armature 240 is magnetized. The magnetic metal part 251 may be constituted by a resin part surrounded by a surface opposite to the surface corresponding to the armature 240. [

When the magnetic metal part 251 is pulled by the armature 240, the opposite side pushes one side of the trip bar 210 so that the trip bar 210 is rotated around the rotation pin 213 do. The supporting pin 255 is provided at the connecting portion between the pushing bar 253 and the magnetic metal part 251 and the supporting pin 255 is connected to the supporting plate 40 or And can be rotatably supported on the stationary plate 70.

The operation of the high current input is such that the armature 240 is magnetized and the magnetic metal part 251 is attracted to the armature 240 so that the pushing bar 253 rotates about the support pin 255, And the trip bar 210 rotates about the rotation pin 213 by the pushing force of the pushing bar 253 on one side of the trip bar 210. [

The ZCT 260 senses the occurrence of leakage current. The wire going to the load passes through the video current transformer 260.

The operation of the video current transformer 260 is the same as that of the current flowing through the video current transformer 260 and the current flowing therethrough in the absence of the leakage current and the magnetic fluxes generated by the video current transformer 260 are canceled each other according to the flowing current. However, when a short circuit occurs, the current starting from one pole does not completely return to the other pole, and the difference of the current is output as a leakage current signal.

The leakage current signal output by the video current transformer 260 may be transmitted to the controller 400 to be described later.

The control unit 400 can operate the trip solenoid 270 when the leakage current signal is equal to or greater than the set value.

The trip solenoid 270 is disposed at a position corresponding to the upper side of the trip bar 210 at a predetermined interval. The trip solenoid 270 is operated according to the judgment of the controller 400 when the video current transformer 260 outputs a leakage current signal so that the trip bar 210 is rotated around the rotation pin 213.

The trip solenoid 270 includes a solenoid valve 271 wound with a coil and a core member 273 positioned within the solenoid valve 271. The trip solenoid 270 is a part of the trip bar 210 connected to the core member 273 by pulling the core member 273 when the control unit 400 generates a magnetic field by applying a current to the coil wound around the solenoid valve 271 The upper portion of the trip bar 210 is pulled to rotate the trip bar 210 about the rotation pin 213.

Rotation of the trip bar 210 causes the pressing member 120 to be disengaged from the engaging portion 211 so that the urging force of the pressing member 120 to the cross bar 110 is removed.

The automatic recovery device 300 operates the handle 30 or the toggle link 130 after the set time to determine whether the mover 50 is disconnected from the stator 60 due to a large current or malfunction, The movable contact 51 is brought into contact with the fixed contact 61 of the stator 60.

2 and 3, the automatic recovery apparatus 300 includes a rotation cam portion 310, a plunger 320, and a recovery solenoid 330. As shown in FIG.

The pivotal cam unit 310 is coupled to the handle 30 or the toggle link 130 at one side so that the handle 30 or the toggle link 130 can be operated by pivoting, do.

More specifically, the pivotal cam portion 310 has a substantially palm-shaped shape, one side of which is coupled to the handle 30 by a pivot 311, the other side of which is provided with a pinion gear 312, ). One end of the interlocking link 315 is coupled to the pivotal cam portion 310 via the link shaft 317 and the other end is coupled to the upper link pin 131 of the toggle link 130 to rotate the pivotal cam portion 310 To the handle (30) or the toggle link (130).

The flange 320 is provided at its upper portion with a recoil gear 321 which meshes with the pinion gear 312 of the rotation cam portion 310. The flange 320 is movable up and down within a support body 325 provided vertically in the circuit breaker body 10. The flange 320 is made of a metal material and is in a lifted state in the support body 325 in the power-off state.

The recovery solenoid 330 is provided at the lower end of the support body 325. When the power recovery signal is output, the recovery solenoid 330 pulls the plunger 320 down by the magnetic force.

When the magnetic force is generated in the recovery solenoid 330, the automatic recovery device 300 pulls the flange 320 downward and pulls the pinion gear 312 engaged with the rack gear 321 of the flange 320 downward Thereby causing the rotation cam portion 310 to rotate around the rotation axis 311. [

The rotation of the pivotal cam portion 310 causes the interlocking link 315 to push the toggle link 130 to cause the lower link pin 133 of the toggle link 130 to move downward along the slot 71. When the lower link pin 133 of the toggle link 130 moves to the lower end of the slot 71, one end of the urging member 120 presses the cross bar 110 and the mover 50 contacts the stator 60, State.

The automatic restoration apparatus 300 may operate according to the judgment of the control unit 400 provided on the circuit board 500.

The control unit 400 receives the operation signal of the armature 240 and the operation signal of the bimetal 230 to operate the trip solenoid according to the output signal of the video current transformer 260, Is separated from the stator 60 and outputs a power recovery signal for automatic recovery.

The control unit 400 can stop the automatic recovery when the number of automatic recovery times is equal to or greater than the set number of times and send an automatic recovery stop signal to the manager or the management server 600. [

For example, the control unit 400 automatically restores the power when the current is cut off due to lightning or noise, automatically restores the power after the short circuit is cut off when the current leakage is cut off, and restores the power when the power is cut off, I never do that.

In addition, the control unit 400 can release the automatic restoration function when a short-time repeated short circuit is detected. For example, you can disable AutoRecovery if you perform AutoRecovery more than once within 30 minutes.

In addition, the control unit 400 can release the automatic recovery function when the power-off due to a short circuit is sustained for a long time (for example, 30 minutes or 60 minutes or more).

The circuit board 500 is provided with a storage unit for storing the operation state of the earth leakage breaker 1 and a communication unit for remotely controlling the operation of the earth leakage breaker, A water immersion sensor for automatically shutting off the power source, and an earthquake sensor for automatically shutting off the power when an earthquake occurs.

Fig. 5 shows a state diagram showing the operation of the instantaneous-leakage communication trip device in the initial state (OFF) and the energized state (ON) according to the embodiment of the present invention. Fig. ) And an instantaneous-trip (OFF) operation of the instantaneous-leak current communication trip device.

Hereinafter, the operation of the present invention will be described with reference to FIGS. 5 and 6. FIG.

The operation of the present invention will be described by dividing it into an initial state (OFF), an energized state (ON), a short circuit trip (OFF), and an instantaneous trip (OFF).

In the initial state, the energized state can be switched to the manual operation in which the handle is tilted from the right to the left. In the energized state, the power shutdown can be performed by the electric leakage trip and the instantaneous trip. .

<Initial state (OFF)>

Figs. 1, 2, and 5 (a) are diagrams showing an initial state (OFF) of the earth leakage breaker.

1 and 2, in the initial state, the earth leakage breaker 1 is in a state in which the handle 30 is turned to the right in the drawing (the handle is rotated clockwise around the rotation axis), and the toggle link The upper link pin 131 connected to the handle 30 is pulled to the upper left side as the handle 30 is turned to the right so that the lower link pin 133 is positioned on the upper side of the slot. Accordingly, the pressing member 120 is disposed at the upper side of the cross bar 110 at one end, and is inclined upward at the other end in the direction of the trip bar 210 to be described later, and does not press the cross bar 110.

The cross bar 110 is pushed upward by the elastic force of the restoring member 140 and the movable contact 51 of the movable member 50 is moved upward by the force of the stator 60 because the pressing member 120 does not press the cross bar 110, And is separated from the stationary contact 61 of the motor.

The automatic recovery apparatus 300 is in a state in which the rack gear 321 of the plunger 320 is engaged with the pinion gear 312 of the pivotal cam unit 310 and lifted up to the upper side so that the plunger 320 is supported by the support body 325 ).

2 and 5 (a), in the initial state, the trip bar 210 of the instantaneous-interlocking trip device is disposed on one side of the switching device 100 and is not rotated.

<Energized state (ON)> _ normal operation

Fig. 3 and Fig. 5 (b) show the energized state (ON).

3, the earth leakage breaker 1 includes a toggle link 130 connected to the handle 30 when the handle 30 is turned to the left in the figure (when the handle is rotated counterclockwise about the rotation axis) The lower link pin 133 is pulled down along the slot 71 as the upper link pin 131 of the lower link pin 131 is pulled to the right.

When the lower link pin 133 descends and is positioned at the lower end of the slot 71, the pressing member 120 coupled to the toggle link 130 pushes the upper portion of the cross bar 110 at one end, As shown in FIG.

The crossbar 110 pushes the mover 50 while pressing the restoring member 140 positioned at the lower portion as the pressing member 120 pushes the cross bar 110 and the movable contact 51 of the mover 50 is moved Contact with the stationary contact 61 of the motor 60 and the power is turned ON.

In this state, when the upper link pin 131 of the toggle link 130 is pulled in the right direction, the automatic recovery apparatus 300 pulls the interlocking link 315 in the right direction and pulls one side of the rotation cam unit 310 The rotation cam unit 310 is rotated counterclockwise. The counterclockwise rotation of the rotation cam unit 310 is performed by lowering the rack gear 321 of the flange 320 engaged with the pinion gear 312 of the rotation cam unit 310 to lower the flange 320 in the support body 325 .

3 and 5 (b), in the energized state, the trip bar 210 of the instantaneous-interlocking trip device is disposed on one side of the switching device 100 and is not rotated.

The earth leakage breaker 1 can manually connect or disconnect the power source by operating the handle 30. [

<Leakage trip (OFF)>

6 (a) shows a short circuit trip (OFF) state.

The overcurrent trip is a mode in which an abnormal current such as an operation of the bimetal 230 or a leakage current is detected by the image current transformer 260 when the over-current flows, and the shut-off solenoid 270 is turned off when the command is given.

When an overcurrent due to overload flows, heat is generated. When heat is generated, one side of the bimetal 230 contracts and the other side expands, and the upper portion of the bimetal 230 is bent toward the trip bar 210. The bimetal 230 bent in the direction of the trip bar 210 pushes the part of the adjustment bolt 221 at the other end of the trip bar 210 to cause the trip bar 210 to rotate around the rotation pin 213.

Rotation of the trip bar 210 causes the pressing member 120 to be disengaged from the engaging portion 211 so that the urging force of the pressing member 120 to the cross bar 110 is removed. The restoring member 140 pushes up the cross bar 110 so that the movable contact 51 of the movable member 50 contacts the fixed contact of the stator 60 61) and the power is cut off.

At this time, the adjustment bolt 221 fastened near both ends of the branch portion 219 of the trip bar 210 adjusts the protruding length so that the bimetal 230 is inclined by the heat until the adjustment bolt 221 is pressed It is possible to control the time that the trip device operates when an overcurrent occurs by adjusting the time of the trip.

The leakage current can be detected when a short circuit occurs. The leakage current is detected by the image transformer 260.

If there is no short circuit, the current flowing into the load or the current flowing out from the load is the same, but when leakage occurs, a difference in the amount of leakage occurs. The video current transformer 260 detects the leakage current by detecting the difference between the current flowing into the load and the current flowing from the load.

When a leakage current is generated, the image transformer 260 outputs a leakage current signal.

The leakage current signal may be transmitted to the control unit 400. The control unit 400 can drive the trip solenoid 270 when the received leakage current signal is equal to or greater than a set value.

The solenoid valve 271 wound on the coil of the trip solenoid 270 flows a current to drive the solenoid.

6 (a), when the solenoid is driven, the core pulls the core member 273 to the right in the figure by the magnetic force of the solenoid, thereby moving the upper part of the trip bar 210 connected to the core member 273 Pull it. When the upper portion of the trip bar 210 is pulled, the trip bar 210 rotates around the rotation pin 213.

Rotation of the trip bar 210 causes the pressing member 120 to be disengaged from the engaging portion 211 so that the urging force of the pressing member 120 to the cross bar 110 is removed.

The restoring member 140 pushes up the cross bar 110 so that the movable contact 51 of the movable member 50 contacts the fixed contact of the stator 60 61) and the power is cut off.

<Instantaneous trip (OFF)>

6 (b) shows an instantaneous trip (OFF) state.

The instantaneous trip is operated by the magnetic force which is generated when there is a momentary inflow of a large current such as a lightning stroke or a surge.

When a large current flows, a large current flows through the bimetal 230 to form a magnetic field around the bimetal 230, and the armature 240 disposed below the bimetal 230 is momentarily magnetized by the magnetic field.

When the armature 240 is magnetized, the armature 240 pulls the magnetic metal piece 251 of the instantaneous action trigger bar 250. 6 (b), the instantaneous motion trigger bar 250 is pivoted to the support pin 255, as shown in Figure 6 (b), when the magnetic metal portion 251 of the instantaneous motion trigger bar 250 is pulled toward the armature 240. [ . When the instantaneous action trigger bar 250 rotates, the push bar 253 inserted in the open hole 217 of the trip bar 210 pushes the trip bar 210. The trip bar 210 rotates about the rotation pin 213 by the pushing force of the push bar 253 to the trip bar 210.

Rotation of the trip bar 210 causes the pressing member 120 to be disengaged from the latching portion 211 of the trip bar 210 so that the force of the pressing member 120 to press the cross bar 110 is removed. The restoring member 140 pushes up the cross bar 110 so that the movable contact 51 of the movable member 50 contacts the fixed contact of the stator 60 61) and the power is cut off.

The automatic recovery apparatus 300 is engaged with the pinion gear 312 of the rotation cam unit 310 and the recoil gear 321 of the plunger 320 in the same manner as the initial state (OFF) when the power is shut off due to the short- So that the plunger 320 is lifted and lowered in the support body.

<Auto recovery (ON)>

Automatic restoration can be performed when power is cut off due to overload, temporary short circuit other than short circuit, lightning, surge and malfunction.

For example, when the automatic recovery device determines that the mover 50 has been disconnected from the stator 60 due to a large current or a malfunction, the automatic recovery device 300 is driven after a predetermined time to move the movable contact 50 51 can be brought into contact with the fixed contact 61 of the stator 60. [

The automatic recovery is performed in such a manner that the control unit 400 operates the trip solenoid 270 according to the output signal of the video current transformer 260 and receives the operation signal of the armature 240 and the operation signal of the bimetal 230, It is determined whether or not the mover 50 has been disconnected from the stator 60. If it is determined that the mover 50 is disconnected from the stator 60 due to a large current or a malfunction, a current is supplied to the recovery solenoid 330, &Lt; / RTI &gt;

When a magnetic force is generated in the recovery solenoid 330, the recovery solenoid 330 pulls the flange 320 made of a metal downward. When the flange 320 is pulled downward, the pinion gear 312 engaged with the rack gear 321 of the flange 320 is pulled downward so that the pivotal cam portion 310 rotates counterclockwise about the pivot 311 (See Fig. 3).

Referring to FIGS. 2 and 3, the rotation of the rotation cam portion 310 is performed by rotating the handle 30 counterclockwise by operating the interlocking link 315 to push the toggle link 130 in the right direction in the drawing While at the same time causing the lower link pin 133 of the toggle link 130 to move downward along the slot 71. When the lower link pin 133 of the toggle link 130 moves downward from the slot 71, the pressing member 120 pushes the cross bar 110 at one end and the other end moves to the hook 211 of the trip bar 210 .

The crossbar 110 pushes the mover 50 while pressing the restoring member 140 positioned at the lower portion as the pressing member 120 pushes the cross bar 110 and the movable contact 51 of the mover 50 is moved Contact with the stationary contact 61 of the motor 60 and the power is turned ON.

7 is a block diagram showing an operation principle of an automatic restoration type earth leakage breaker according to an embodiment of the present invention.

7, in the automatic restoration type earth leakage breaker, the electric wire to the load passes through the screen current transformer 260. [ The video current transformer 260 detects the leakage current due to the difference between the current flowing into the load and the current flowing from the load in the energized state.

The video current transformer 260 outputs a leakage current signal to the controller 400 when a leakage current is detected.

The control unit 400 drives the trip solenoid 270 to rotate the trip bar 210 when it determines that the leakage current signal is equal to or greater than the preset value. Rotation of the trip bar 210 releases the state in which the pressing member 120 presses the cross bar 110 to turn off the power.

In addition, when the large current flows, the armature 240 connected to the load side is magnetized to rotate the trip bar 210. Rotation of the trip bar 210 releases the state in which the pressing member 120 presses the cross bar 110 to turn off the power. The signal to which the armature 240 is magnetized can be transmitted to the controller 400. [

In addition, when the overcurrent flows, the bimetal 230 is bent and pushes the upper portion of the trip bar 210 to rotate the trip bar 210. Rotation of the trip bar 210 releases the state in which the pressing member 120 presses the cross bar 110 to turn off the power. A signal or an overcurrent that bends the bimetal 230 may be transmitted to the controller 400.

The control unit 400 determines the leakage current signal, the large current signal, and the overcurrent signal, and drives the recovery solenoid 330 of the automatic recovery apparatus 300 after the lapse of the set time when the power is cut off due to the large current or the malfunction .

The recovery solenoid 330 rotates the pivotal cam portion 310 connected to the handle 30 or the toggle link 130 by the interlocking link 315 by lifting the plunger 320 so that the urging member 120 is rotated by the crossbar 110) can be released to restore power.

The control unit 400 can stop the automatic recovery when the number of automatic recovery times is equal to or greater than the set number of times and send an automatic recovery stop signal to the manager or the management server 600. [

As described above, the automatic restoration type earth leakage breaker performs real-time detection through the actual leakage current detection circuit (video current transformer) on the load side to determine the cause of the abnormality and the cause of the interruption, and performs the automatic restoration and shutdown function.

In addition, the automatic restoration type earth leakage breaker can be automatically restored when the power source is disconnected and the risk factors of the earth leakage breaker are solved. Therefore, it is easy to apply the automatic recovery to the urgent necessary oil, wireless telecommunication carriers and major facilities in the country.

In addition, the automatic restoration type earth leakage breaker can simplify the structure of the automatic recovery device because the switching device for power interruption and automatic restoration, the instantaneous-leakage interrupted trip device, and the automatic recovery device are integrally formed in the circuit breaker main body.

In addition, since the automatic recovery device is configured to apply the solenoid to actuate the toggle link connected to the handle and the handle, it is possible to operate smoothly without being limited by the space within the breaker main body.

Best Mode for Carrying Out the Invention The present invention has been described with reference to the drawings and the specification. Although specific terms are used herein, they are used for the purpose of describing the present invention only and are not used to limit the scope of the present invention described in the claims or the claims. Therefore, it is to be understood that the present invention may be embodied in many other specific forms without departing from the spirit or essential characteristics thereof. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.

1: Auto recovery type earth leakage breaker
10: breaker main body 20: cover
21: opening 23: test button
25: Select switch 27: Display
30: Handle 31:
40: support plate 50: movable member
51: movable contact 60: stator
61: stationary contact point 70: stationary plate
71: Slot 100: Switching device
110: crossbar 120: pressure member
130: toggle link 131: upper link pin
133: lower link pin 140: restoring member
200: instantaneous-leakage current interlock trip device 210: trip bar
211: engaging portion 213: rotating pin
215: lower vertical extension part 216: inclined extension part
217: open hole 218: middle vertical extension
219: branch portion 221: adjusting bolt
230: Bimetal 240: Amateur
250: instantaneous action trigger bar 251: magnetic metal part
253: Push bar 255: Support pin
260: Video current transformer 270: Trip solenoid
271: solenoid valve 273: core member
300: automatic restoration device 310: rotation cam portion
311: Pivot shaft 312: Pinion gear
315: interlock link 317: link axis
320: Flanger 321: Leak gear
325: Support body 330: Recovery solenoid
400: control unit 500: circuit board
600: management server

Claims (10)

A switching device for turning on and off the power by contacting and separating the mover with the stator by operating the handle and the toggle link engaged with the handle;
An instantaneous-leakage current interrupting trip device which detects a large current, an overcurrent, and a leakage current and separates the mover from the stator; And
An automatic recovery device that operates the handle or the toggle link to contact the mover with the stator after a set time if it is determined that the mover is disconnected from the stator due to the large current or malfunction.
In an integrated manner in the circuit breaker main body,
The switching device
A crossbar to which the mover is coupled;
A pressing member for pressing the cross bar to contact the mover with the stator;
The toggle link causing the pressing member to press the crossbar as one side is connected to the handle and the other side is connected to the pressing member so that the handle rotates; And
A restoring member for providing an elastic force to push up the cross bar so that the mover is separated from the stator when the force pressing the pressing member against the cross bar is removed;
Lt; / RTI &gt;
The instantaneous-leak current interlocking trip device
A trip bar formed with a latching portion for pressing one end of the pressing member and releasing the pressing member from the latching portion when the other end rotates about the rotation pin, thereby removing the pressing force of the pressing member against the crossbar;
A bimetal for operating the trip bar when the overcurrent flows into the bimetal;
An armature which is operated when a large current flows into the arm so that the trip bar is rotated around the rotation pin;
A video current transformer that detects the occurrence of actual leakage current on the load side through the wire to the load; And
A trip solenoid that is operated when the current transformer outputs a leakage current signal to cause the trip bar to rotate about the rotation pin;
/ RTI &gt;
The automatic recovery device
A rotary cam portion having one side coupled to the handle or the toggle link via an interlocking link and having a pinion gear on the opposite side to operate the handle or the toggle link by pivoting;
A flange that is provided in the support body vertically installed in the breaker body and is movable up and down in a state where the power is off, And
And a recovery solenoid for pulling down the plunger by a magnetic force when a power recovery signal is output,
And a controller for determining whether the mover is disconnected from the stator due to the large current or malfunction and outputting the power recovery signal for automatic recovery,
The control unit receives a signal for operating the armature by the large current, a signal for activating the bimetal by the overcurrent, and a leakage current signal output from the video current transformer, and determines whether the mover is disconnected from the stator due to the large current or malfunction Is determined based on a result of the comparison. delete delete The method according to claim 1,
Wherein the bimetal has an upper portion corresponding to the other end of the trip bar,
And the trip bar is rotated about the rotation pin by pushing the other end of the trip bar while the upper portion is bent toward the trip bar when the over current is flowed. The method according to claim 1,
The armature is installed at one end of the trip bar,
And the instantaneous operation trigger bar pushes one side of the trip bar so that the trip bar is rotated around the rotation pin. The method of claim 5,
The instantaneous action trigger bar
A magnetic metal part disposed at a position corresponding to the armature and attracted to the armature when the armature is magnetized;
One end of the trip bar is connected to the magnetic metal part and the other end is fitted to the trip bar. When the magnetic metal part is pulled by the armature, the opposite side pushes one side of the trip bar, And a pushing bar for causing the pushing member to move in the direction of the arrow. The method according to claim 1,
The trip solenoid
Wherein the trip bar is disposed at a position corresponding to the other end of the trip bar and pulls the other end of the trip bar by a magnetic force so that the trip bar is rotated around the rotation pin. delete delete The method according to claim 1,
Wherein the controller stops the automatic recovery when the number of times of the automatic recovery is equal to or greater than the preset number of times and transmits an automatic recovery stop signal to the manager or the management server.

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