KR20110080639A - Circuit breaker - Google Patents

Circuit breaker Download PDF

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Publication number
KR20110080639A
KR20110080639A KR1020100000967A KR20100000967A KR20110080639A KR 20110080639 A KR20110080639 A KR 20110080639A KR 1020100000967 A KR1020100000967 A KR 1020100000967A KR 20100000967 A KR20100000967 A KR 20100000967A KR 20110080639 A KR20110080639 A KR 20110080639A
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KR
South Korea
Prior art keywords
shutter
terminal
arm
circuit breaker
cradle
Prior art date
Application number
KR1020100000967A
Other languages
Korean (ko)
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KR101068759B1 (en
Inventor
김현규
Original Assignee
엘에스산전 주식회사
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Priority to KR1020100000967A priority Critical patent/KR101068759B1/en
Publication of KR20110080639A publication Critical patent/KR20110080639A/en
Application granted granted Critical
Publication of KR101068759B1 publication Critical patent/KR101068759B1/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/58—Electric connections to or between contacts; Terminals
    • H01H1/5833—Electric connections to or between contacts; Terminals comprising an articulating, sliding or rolling contact between movable contact and terminal
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
    • H01H33/66—Vacuum switches
    • H01H33/6606—Terminal arrangements
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B11/00—Switchgear having carriage withdrawable for isolation
    • H02B11/18—Switchgear having carriage withdrawable for isolation with isolation by vertical withdrawal
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2227/00—Dimensions; Characteristics
    • H01H2227/036—Minimise height

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  • Trip Switchboards (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)

Abstract

The present invention relates to a circuit breaker, comprising: a cradle having a plurality of terminals; A circuit breaker main body having a plurality of terminal connecting portions connected to said terminal, said breaker main body being movable between a connecting position where said terminal connecting portion is connected to said terminal and a separating position at which said terminal connecting portion is separated from said terminal; And a shutter disposed obliquely to the cradle to rotate between a blocking position for blocking the terminal and an open position for opening the terminal. As a result, the height can be reduced, and the opening and closing operation of the shutter can be made smooth.

Description

Circuit breaker {CIRCUIT BREAKER}

The present invention relates to a circuit breaker, and more particularly, to a circuit breaker that can reduce the height.

As is well known, circuit breakers include high voltage circuit breakers that cut high voltage lines from kilovolts to hundreds of kilovolts depending on line voltages, and low voltage circuit breakers that cut off low voltage lines below hundreds of volts behind the transformer. Can be distinguished.

In addition, the circuit breaker may be classified into a fixed type that is fixedly arranged according to an installation form, and a pull-out type that can be pulled out with respect to the cradle. The lead-out circuit breaker is widely used for testing and maintenance.

The draw-out circuit breaker includes a circuit breaker main body including an opening / closing mechanism for opening and closing a circuit, a control unit represented by an overcurrent relay, and a terminal portion, and an external power source and a load side, and the circuit breaker main body can be connected to a lead-in, test or draw-out position. Accordingly, it may be configured to include a cradle (cradle) having a terminal portion that can be connected or disconnected to the terminal portion of the breaker body. The draw-out circuit breaker may include a draw-out device for drawing in or out of the breaker body.

1 is a perspective view before coupling the cradle and the circuit breaker body of the conventional circuit breaker, Figure 2 is a side cross-sectional view of the cradle of Figure 1, Figure 3 is a view showing the open state of the shutter of Figure 2, Figures 4 and 5 2 is a diagram illustrating the shutter and the driving device of FIG. 2, respectively. As shown in FIG. 1, a circuit breaker includes a cradle 10 having a plurality of terminals 12 connected to a bus bar and a load, and a plurality of terminal connection parts connected to a terminal 12 connected to the bus line and a load. 22 may be provided with a circuit breaker body 20 which is coupled to the cradle 10 to be retractable and withdrawn.

A vacuum circuit breaker may be provided inside the circuit breaker main body 20, and a plurality of terminals may be connected to the terminals 12 connected to the bus bar and the load of the cradle 10 in a rear region of the circuit breaker main body 20. Each connecting portion 22 may be formed. A plurality of wheels 25 may be provided below the breaker body 20.

A plurality of terminals 12 may be provided on the rear wall of the cradle 10, and the terminals 12 may be open at one side thereof so that each terminal connecting portion 22 of the circuit breaker body 20 may be inserted. Can be formed.

The rear wall of the cradle 10 may be provided with a shutter 15 to open and close the inlet side of the terminal 12. The shutter 15 may include an upper shutter 16 and a lower shutter 17 spaced apart from each other in the vertical direction. Each of the shutters 15 may be formed of an elongate plate member.

The shutter 15 may be disposed to be elevated in a vertical direction of the rear wall of the cradle 10. Both sidewalls of the cradle 10 may be provided with a driving device 30 to drive the shutter 15 in the lifting and lowering.

The driving device 30 includes a driving arm 31 rotatably disposed on the sidewall of the cradle 10, one end of which is connected to an end of the driving arm 31, and the other end of the shutter 15. It may be provided with a drive link (39) connected to.

The driving arm 31 and the driving link 39 may be configured in plural.

Each driving arm 31 may be provided with a contact bushing 35 to be in contact with the breaker main body 20 when the breaker main body 20 enters. The driving arm 31 may be rotatably coupled to the same rotation shaft 33. The rotating shaft 33 of the driving arm 31 may be provided with a spring 37 for elastically pressing the driving arm 31 disposed below the drawing. The spring 37 may be a torsion spring 37.

Both side walls of the circuit breaker main body 20 may be provided with a bushing pressurizing portion 27 for contacting the contact bushing 35 of each driving arm 31 to press the driving arms 31 to rotate. .

The bushing pressing part 27 may be formed in plural so as to be spaced up and down. Thereby, when the breaker body 20 is moved to connect the terminal connecting portion 22 of the breaker body 20 and the terminal 12 of the cradle 10, by the bushing pressurizing portion 27. As the driving arms 31 are pressed and rotated, the shutters 15 are driven up and down, respectively, so that the inlet side of the terminal 12 can be opened.

When the breaker main body 20 is moved apart in the drawing, the upper shutter 16 is lowered by its own weight, and the lower shutter 17 is lifted by the elastic force of the torsion spring 37 to block the inlet area of the terminal 12, respectively. Can be.

However, in such a conventional circuit breaker, the shutter 15 is formed of a single plate-like member to be moved up and down in the vertical direction of the rear wall portion of the cradle 10 so that the height of the cradle 10 may increase accordingly. have.

In addition, the upper shutter 16 is configured to descend by its own weight, so that the opening and closing operation of the upper shutter 16 may be incomplete.

In addition, the torsion spring 37 which provides a driving force for raising the lower shutter 17 is configured to be pressurized by contacting the breaker main body 20 with the breaker main body of the torsion spring 37 over time. Deformation or damage of the contact area in contact may occur. As a result, the opening and closing operation of the lower shutter 17 may not be smooth.

Accordingly, an object of the present invention is to provide a circuit breaker capable of reducing the height.

In addition, another object of the present invention is to provide a circuit breaker capable of smoothly opening and closing the shutter.

The present invention, in order to achieve the above object, a cradle having a plurality of terminals; A circuit breaker main body having a plurality of terminal connecting portions connected to said terminal, said breaker main body being movable between a connecting position where said terminal connecting portion is connected to said terminal and a separating position at which said terminal connecting portion is separated from said terminal; And a shutter disposed obliquely to the cradle to rotate between a blocking position for blocking the terminal and an open position for opening the terminal, wherein the shutter comprises: a first shutter rotatably provided in the cradle; And a second shutter connected to an end of the shutter in a rotatable manner, wherein the first shutter and the second shutter are folded in the open position, and the first shutter is inclined when the shutter is closed. And the second shutter is disposed vertically.

Here, the shutter may be configured to further include a shutter driving device for driving the shutter to the open position in conjunction with the breaker body when moving to the connection position of the breaker body.

The shutter driving device includes a driving link connected to one end of the first link, a driving arm connected to the other end of the driving link, and a driving arm rotating unit pressed by the breaker body to rotate the driving arm. Can be configured.

The driving arm rotating unit is provided with a first link and a second arm spaced apart from each other to be rotatable, a link link connecting the first arm and the second arm, and a breaker body to pressurize the link link. It may include wealth.

The terminal may include a plurality of upper and lower terminals spaced apart vertically, and the shutter may include an upper shutter for opening and closing the upper terminal and a lower shutter for opening and closing the lower terminal.

The driving link may further include a power transmission unit connected to the first shutter of the lower shutter and transmitting a rotational force of the first shutter to the upper shutter.

The power transmission unit may include a sprocket wheel provided on a rotation shaft of each of the first shutters of the lower shutter and the upper shutter, and a chain coupled to each sprocket wheel.

The cradle may be provided with a guide for guiding the second shutter.

The second shutter may be provided with a roller, and the guide may be formed along a movement trajectory of the roller.

It may be configured to further include a locking unit for suppressing the shutter is unintentionally opened at the separation position of the breaker body.

The first arm is arranged to be in contact with the breaker body before the second arm when entering the connection position of the breaker body, the locking unit is a locking position to suppress the rotation of the first arm and the rotation of the first arm A release position that enables this can be rotatably arranged.

The pressing unit may be provided with a locking unit release unit for causing the locking unit to rotate to the release position.

It may further comprise a return unit for returning the first arm to the initial position.

The return unit may be implemented by a tension spring.

As described above, according to the exemplary embodiment of the present invention, the height of the cradle can be reduced by providing a shutter disposed obliquely to the cradle to block an entrance area of the terminal.

In addition, the height of the cradle can be further reduced by foldable the shutter.

In addition, since the shutter is opened by the load of the breaker main body, there is no fear that the shutter is unintentionally opened.

1 is a perspective view before coupling the cradle and the circuit breaker body of the conventional circuit breaker,
2 is a side cross-sectional view of the cradle of FIG. 1, FIG.
3 is a view illustrating an open state of the shutter of FIG.
4 and 5 are views showing the shutter and the driving device of FIG.
6 is a side cross-sectional view of a circuit breaker according to an embodiment of the present invention;
7 is a front view of the shutter of FIG. 6;
8 is a side view of the shutter driving device of FIG. 6;
FIG. 9 is a view illustrating an open state of the shutter of FIG. 8.

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

6 is a side cross-sectional view of a circuit breaker according to an embodiment of the present invention, FIG. 7 is a front view of the shutter of FIG. 6, FIG. 8 is a side view of the shutter driving device of FIG. 6, and FIG. 9 is a view of the shutter of FIG. 8. It is a figure which shows an open state. As shown in FIG. 6, the circuit breaker includes a cradle 110 having a plurality of terminals 112, and a plurality of terminal connection portions 122 that may be connected to and disconnected from the terminals 112 of the cradle 110. A breaker body 120 disposed to be retractable in the cradle 110 and disposed to be inclined to the cradle 110 to open a blocking position and the terminal 112 to block the terminal 112. It may be configured to include a shutter 130 that can be rotated between the open position.

The cradle 110 is disposed on both sides of the bottom plate portion 111a, the rear wall portion 111b vertically disposed with respect to the bottom plate portion 111a, and the bottom plate portion 111a and the rear wall portion 111b. Both side plate portions 111c may be provided. The rear wall portion 111b may be provided with a plurality of terminals 112 respectively connected to the bus bar and the load. The terminal 112 may include a plurality of upper terminals 113 and lower terminals 114 respectively disposed above and below.

The circuit breaker main body 120 may include a plurality of terminal connection parts 122 connected to terminals 112 respectively connected to the bus bar and the load. Each terminal connecting portion 122 may be spaced apart from each other vertically and horizontally to be connected to the upper terminal 113 and the lower terminal 114, respectively. A plurality of wheels 124 may be provided in the lower region of the breaker main body 120 to allow movement.

Meanwhile, a shutter 130 may be provided at the rear wall portion 111b of the cradle 110 to open and close the entrance area of the terminal 112. The shutter 130 may include an upper shutter 150 and a lower shutter 140 to open and close each inlet area of the upper terminal 113 and the lower terminal 114.

As shown in FIGS. 6 and 7, the upper shutter 150 and the lower shutter 140 may include first shutters 141 and 151 disposed to be inclined with respect to the cradle 110, and first shutters 141 and 151. Second shutters 142 and 152 disposed vertically on one side of each may be provided. As a result, the height required for opening and closing the shutter 130 may be reduced, thereby lowering the overall height of the circuit breaker.

The first shutters 141 and 151 and the second shutters 142 and 152 may be configured to be rotatable. More specifically, the first shutters 141 and 151 may be rotatably disposed with respect to the cradle 110, and the second shutters 142 and 152 may be rotatably connected to the first shutters 141 and 151.

In addition, the first shutters 141 and 151 and the second shutters 142 and 152 may be rotated when the inlet area of the terminal 112 is opened to be folded. As a result, the height for lifting the shutter 130 can be reduced more effectively.

The upper shutter 150 is configured to include a first shutter 151 disposed to be inclined downward toward the front and a second shutter 152 disposed to extend vertically from a lower end of the first shutter 151. Can be.

The lower shutter 140 is configured to include a first shutter 141 disposed to be inclined upwardly downward at a lower side, and a second shutter 142 disposed to extend vertically from an upper end of the first shutter 141. Can be.

The cradle 110 may be provided with a shutter driving device 170 that allows the shutter 130 to open the entrance area of the terminal 112 in cooperation with the breaker main body 120.

The shutter driving device 170 includes a driving arm 171 rotatably disposed on the cradle 110, one end of which is connected to the driving arm 171, and the other end of which is connected to the shutter 130. A driving arm 173 and a driving arm rotating unit 175 that is pressed by the breaker main body 120 to rotate the driving arm 171 may be provided.

Support plates 115 may be provided on both side plate portions 111c of the cradle 110 to support the driving arm 171. The driving arm 171 may be rotatably coupled to the support plate 115.

The driving arm rotating unit 175 is spaced apart from each other so that the first arm 177 and the second arm 183 are disposed to be rotatable, and end portions of the first arm 177 and the second arm 183 are disposed. It may be provided with a connection link 187 to be connected. The second arm 183 may be fixedly coupled to the rotation shaft 172 of the drive arm 171. Accordingly, when the second arm 183 rotates, the driving arm 171 may be rotated at the same time. One side of the second arm 183 may be provided with a return unit 185 for returning the second arm 183 to the initial position.

The return unit 185 may be implemented with a tension coil spring 185. Here, the return unit 185 may be configured using other types of springs or electric motors and gears. One end of the return unit 185 may be connected to the second arm 183 and the other end may be connected to the support plate 115.

The return unit 185 is tensioned when entering the breaker main body 120 to accumulate elastic force, and returns the second arm 183 to the initial position with the elastic force accumulated when the breaker main body 120 is separated out. Can be. As a result, the driving arm 171 is returned to the initial position so that the upper shutter 150 and the lower shutter 140 may be moved to a blocking position that blocks the inlet area of the terminals 112.

A locking unit 191 may be provided at one side of the first arm 177 to prevent the first arm 177 from being unintentionally rotated. The locking unit 191 may be configured to be rotatable between a locking position for inhibiting rotation of the first arm 177 and a release position for allowing rotation of the first arm 177.

The locking unit 191 may be provided to protrude so that the locking unit 191 may be inserted into the first arm 177, and may include a locking step 193 that suppresses rotation of the first arm 177. Correspondingly, the first arm 177 may be provided with a locking jaw groove 178 recessed to allow the locking jaw 193 to be inserted therein. A guide slope surface 194 may be formed at the locking jaw 193 to smoothly contact the breaker body 120 and to release the locking state of the locking unit 191. The guide slope 194 may be formed to be inclined upwardly to the outside.

The cradle 110 may be provided with a shutter support plate 117 for supporting the shutter 130. The shutter support plate 117 may be formed of an elongated plate member. More specifically, the shutter support plate 117 may be disposed vertically in each of both side plate portions 111c of the cradle 110. Rotating shafts of the first shutters 141 and 151 may be rotatably supported by the shutter support plate 117.

Rollers 145 and 155 may be provided at both end portions of the second shutters 142 and 152. Guides 147 may be provided on the shutter support plate 117 to guide the second shutters 142 and 152, respectively. More specifically, the guide 147 may be formed along the movement trajectory of the rollers 145 and 155 so that the rollers 145 and 155 may move while being in contact with the clouds.

On the other hand, the cradle 110 may be provided with a power transmission unit 210 for transmitting a driving force by the shutter driving device 170. More specifically, the power transmission unit 210 may transmit the driving force of the shutter driving device 170 to the upper shutter 150 when the lower shutter 140 is rotated by the shutter driving device 170. It can be configured to be.

The power transmission unit 210 may include a plurality of sprocket wheels 211 and each of the sprocket wheels 211 provided on the rotation shafts of the first shutters 141 and 151 of the lower shutter 140 and the upper shutter 150. It can be configured to include a chain 213 coupled at the same time. Here, the chain 213 may be coupled to the sprocket wheel 211 with a so-called stagger so that the sprocket wheel 211 is rotated in opposite directions. As a result, when the first shutter 141 of the lower shutter 140 rotates downward, the first shutter 141 of the upper shutter 150 may rotate upward. Here, the power transmission unit 210 may be configured using other power transmission means, for example, belts and pulleys, gear trains.

The breaker body 120 may be provided with a pressing portion 125 for pressing the connection link 187 to rotate downward. The pressing unit 125 may be provided on both sidewalls of the breaker body 120, respectively. The pressing unit 125 may be provided with a locking unit release unit 126 that contacts the locking unit 191 and rotates the locking unit 191 to a release position.

The locking unit release unit 126 may be formed to extend upward from the pressing unit 125. The locking unit release part 126 may be formed to be inclined upwardly so as to be in contact with the first arm 177 smoothly. The locking unit release part 126 may be provided with a working pin part 127 protruding to rotate the locking unit 191 upward. The action pin 127 may be horizontally moved in contact with the guide inclined surface 194 of the locking unit 191 such that the guide inclined surface 194 may be relatively moved upward. As a result, the locking unit 191 may be pivoted upward to the release position.

By such a configuration, when the terminal connecting portion 122 of the breaker body 120 is separated from the terminal 112 of the cradle 110, the upper shutter 150 and the lower shutter 140 are shown in FIG. 6. 8, the cradle 110 may be disposed at a blocking position that blocks an inlet area of each terminal 112 of the cradle 110. At this time, the driving arm 171 is disposed to be inclined in the vertical direction, the second arm 183 is pulled by the elastic force of the return unit 185 to maintain a vertically arranged state. The locking unit 191 suppresses unintentional rotation of the first arm 177 in the locked position.

On the other hand, when the circuit breaker main body 120 moves to a connection position where the terminal connecting portion 122 of the circuit breaker main body 120 and the terminal 112 of the cradle 110 are connected, the locking unit of the circuit breaker main body 120 The release unit 126, more specifically, the action pin 127 is in contact with the guide inclined surface 194 of the locking unit 191 to press the locking unit 191 upward to release the locking unit 191 Rotate to As a result, the first arm 177 is brought into a rotatable state.

When the breaker body 120 is continuously moved to the connecting position, the locking unit release portion 126 is in contact with the upper end of the first arm 177 to press the first rotating arm. As a result, the first pivotal arm rotates clockwise in the drawing, and at the same time, the second pivotal arm and the driving arm 171 are rotated clockwise. Accordingly, the first shutter of the lower shutter 140 is pressed downward by the drive link 173 and rotates downward in the counterclockwise direction.

When the first shutter of the lower shutter 140 starts to rotate, the rotational force of the first shutter rotates the rotation shaft of the first shutter 151 of the upper shutter 150 through the chain 213. Here, the first shutter 151 is rotated along the clockwise direction in the drawing.

When each of the first shutters 141 and 151 of the lower shutter 140 and the upper shutter 150 starts to rotate, the second shutters 142 and 152 connected to the end portions of the first shutters 141 and 151 so as to be relatively rotatable may be provided. The shutters 141 and 151 may be pulled downward (or upward), respectively, and moved along the vertical direction. In this case, the second shutters 142 and 152 may be stably moved by the rollers 145 and 155 provided at the end thereof in contact with the guide 147.

When the circuit breaker body 120 continues to move to the connection position, the bottom surface of the pressing unit 125 may be moved in contact with the top surface (end) of the connection link 187. As a result, the first arm 177 and the second arm 183 continue to rotate downward, and the driving arm 171 can be rotated to be disposed almost horizontally, as shown in FIG. 9.

As the driving arm 171 rotates, the first and second shutters 141 and 151 and the second and second shutters 142 and 152 of the lower shutter 140 and the upper shutter 150 are driven as shown in FIG. 9. It rotates in conjunction with the rotation of 171 and is folded in each other, and is located in the open position which opens the entrance area | region of each terminal 112. FIG. When the second arm 183 is rotated, the return unit 185, more specifically, the tension coil spring 185 is extended to accumulate elastic force.

On the other hand, when the terminal connecting portion 122 of the breaker body 120 is moved to the separation position to be separated from the corresponding terminal 112 of the cradle 110, the lower shutter 140 and the upper shutter 150 is the It is located in the open position. When the pressing portion 125 of the breaker body 120 passes the end of the connecting link 187, the second arm 183 is rotated counterclockwise in the drawing by the elastic force of the return unit 185. Can be.

As the second arm 183 is rotated to the initial position, the driving arm 171 returns to the initial position, and the first shutter 141 of the lower shutter 140 pressed by the drive link 173. Is rotated clockwise on the drawing. As the first shutter 141 of the lower shutter 140 starts to rotate, the upper shutter 150 starts to operate, and the lower shutter 140 and the upper shutter 150 are connected to the terminal 112. It is moved to a blocking position that blocks the entrance area of the.

In the above, specific embodiments of the present invention have been shown and described. However, the present invention can be embodied in various forms without departing from the spirit or essential features thereof, so the embodiments described above should not be limited by the details of the detailed description.

Further, even when the embodiments not listed in the detailed description have been described, it should be interpreted broadly within the scope of the technical idea defined in the appended claims. It is intended that the present invention cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.

110: cradle 113: upper terminal
114: lower terminal 115: support plate
117: shutter support plate 120: breaker body
122: terminal connection 124: wheel
125: pressure unit 126: locking unit release unit
127: action pin 130: shutter
140: lower shutter 141,151: first shutter
142,152 Second shutter 145,155 Roller
147: Guide 150: Lower Shutter
170: shutter driving device 171: driving arm
173: drive link 175: drive arm rotation part
177: first arm 183: second arm
185: return unit 187: connection link
191: locking unit 193: locking jaw
210: power transmission unit 211: sprocket wheel
213: Chain

Claims (13)

A cradle having a plurality of terminals;
A circuit breaker main body having a plurality of terminal connecting portions connected to said terminal, said breaker main body being movable between a connecting position at which said terminal connecting portion is connected to said terminal and a separating position at which said terminal connecting portion is separated from said terminal; And
A shutter disposed obliquely to the cradle to rotate between a blocking position for blocking the terminal and an open position for opening the terminal;
The shutter includes a first shutter rotatably provided at the cradle, a second shutter connected to an end of the first shutter so as to be relatively rotatable, and the first shutter and the second shutter in the open position. Is being folded,
And the first shutter is disposed to be inclined and the second shutter is disposed vertically at the blocking position of the shutter. The method of claim 1,
And a shutter driving device which drives the shutter to an open position in association with the breaker body when moving to the connection position of the breaker body. The method of claim 2,
The shutter driving device includes a driving link connected to one end of the first link, a driving arm connected to the other end of the driving link, and a driving arm rotating unit pressed by the breaker body to rotate the driving arm. Circuit breaker. The method of claim 3,
The driving arm rotating unit is provided with a first link and a second arm spaced apart from each other to be rotatable, a link link connecting the first arm and the second arm, and a breaker body to pressurize the link link. Circuit breaker comprising a part. The method of claim 4, wherein
The terminal has a plurality of upper and lower terminals spaced apart vertically, the shutter comprises a top shutter for opening and closing the upper terminal and a lower shutter for opening and closing the lower terminal. The method of claim 5,
The driving link is connected to the first shutter of the lower shutter, the circuit breaker further comprises a power transmission unit for transmitting a rotational force of the first shutter to the upper shutter. The method of claim 6,
The power transmission unit, the circuit breaker comprising a sprocket wheel provided on the rotary shaft of each of the first shutter of the lower shutter and the upper shutter, the chain coupled to each of the sprocket wheel at the same time. The method of claim 6,
The cradle is a circuit breaker, characterized in that provided with a guide for guiding the second shutter. The method of claim 8,
The second shutter is provided with a roller, the circuit breaker, characterized in that formed along the movement trajectory of the roller. The method of claim 4, wherein
And a locking unit which prevents the shutter from being accidentally opened at the separation position of the breaker body. The method of claim 10,
The first arm is arranged to contact the breaker body before the second arm when entering the connection position of the breaker body,
And the locking unit is rotatably disposed between a locking position for inhibiting rotation of the first arm and a release position for enabling rotation of the first arm. The method of claim 11,
And said locking portion is provided with a locking unit release portion for causing said locking unit to rotate to said release position. The method of claim 12,
And a return unit for returning the first arm to an initial position.
KR1020100000967A 2010-01-06 2010-01-06 Circuit breaker KR101068759B1 (en)

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KR1020100000967A KR101068759B1 (en) 2010-01-06 2010-01-06 Circuit breaker

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KR101068759B1 KR101068759B1 (en) 2011-09-28

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Cited By (2)

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Publication number Priority date Publication date Assignee Title
KR101241799B1 (en) * 2011-07-21 2013-03-15 엘에스산전 주식회사 A Device for Shutter Pad Lock and Shutter Locking Method thereof
KR20210144021A (en) * 2020-05-21 2021-11-30 현대일렉트릭앤에너지시스템(주) shutter apparatus of distribution panel

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KR101217501B1 (en) 2011-10-28 2013-01-02 엘에스산전 주식회사 Safety shutter apparatus for withdrawable circuit breaker
KR101852320B1 (en) * 2018-01-05 2018-06-08 주식회사 대연 Distributing board

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JPH0951606A (en) * 1995-08-07 1997-02-18 Fuji Electric Co Ltd Shutter device of breaker for distribution panel
JPH09161625A (en) * 1995-12-11 1997-06-20 Terasaki Denki Sangyo Kk Shutter device of drawer type circuit breaker
KR100451372B1 (en) 2002-04-10 2004-10-06 엘지산전 주식회사 Devise operating shutter of cradle for vacuum circuit breaker

Cited By (2)

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Publication number Priority date Publication date Assignee Title
KR101241799B1 (en) * 2011-07-21 2013-03-15 엘에스산전 주식회사 A Device for Shutter Pad Lock and Shutter Locking Method thereof
KR20210144021A (en) * 2020-05-21 2021-11-30 현대일렉트릭앤에너지시스템(주) shutter apparatus of distribution panel

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