KR20110085234A - Interlock apparatus for vacuum circuit breaker - Google Patents

Interlock apparatus for vacuum circuit breaker Download PDF

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Publication number
KR20110085234A
KR20110085234A KR1020100004904A KR20100004904A KR20110085234A KR 20110085234 A KR20110085234 A KR 20110085234A KR 1020100004904 A KR1020100004904 A KR 1020100004904A KR 20100004904 A KR20100004904 A KR 20100004904A KR 20110085234 A KR20110085234 A KR 20110085234A
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KR
South Korea
Prior art keywords
interlock
lever
locking unit
circuit breaker
plate portion
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KR1020100004904A
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Korean (ko)
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KR101071097B1 (en
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이내욱
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엘에스산전 주식회사
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Priority to KR1020100004904A priority Critical patent/KR101071097B1/en
Publication of KR20110085234A publication Critical patent/KR20110085234A/en
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    • 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
    • H02B11/12—Switchgear having carriage withdrawable for isolation with isolation by horizontal withdrawal
    • H02B11/127—Withdrawal mechanism
    • H02B11/133—Withdrawal mechanism with interlock

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)

Abstract

PURPOSE: An interlock apparatus of a vacuum interrupter is provided to suppress the deformation of components due to high heat in a welding process by combining a change lever, an interlock bar, an interlock lever, and a locking unit with a frame. CONSTITUTION: An interlock lever(231) is rotatably combined with a frame(181). The interlock lever is connected to one side of an interlock bar(221) and lifts the interlock bar. A locking unit(241) is arranged between the change lever and the interlock lever. The locking unit rotates between a locking location and an unlocking location. The rise of the interlock lever is suppressed by the change lever in the unlocking location.

Description

Interlock device of vacuum circuit breaker {INTERLOCK APPARATUS FOR VACUUM CIRCUIT BREAKER}

The present invention relates to an interlock device of a vacuum circuit breaker, and more particularly, to an interlock device of a vacuum circuit breaker that can shorten the welding location, shorten the manufacturing time and reduce the manufacturing cost.

As is well known, a circuit breaker is an electrical protection device provided between a power supply and a load device so as to protect the load device and the line from possible accident currents (large current due to short circuit, ground fault, etc.) in the electric circuit.

These circuit breakers are classified according to the arc voltage for extinguishing the voltage or arc used, and vacuum circuit breakers and gas circuit breakers are widely used as high pressure circuit breakers.

A vacuum circuit breaker is a device for protecting circuits and devices that quickly disconnects the arc by firing an arc generated during normal load switching and breaking of an accident current in a so-called VUCUM INTERRUPTER.

Such a vacuum circuit breaker may be classified into a fixed type that is fixedly arranged according to an installation form, and a pull-out type that is retractably arranged with respect to the cradle. The draw-out type vacuum circuit breaker is widely used for testing and maintenance.

The draw-out type vacuum 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 vacuum circuit breaker may include a draw-out device for drawing in or out of the breaker body.

The draw-out vacuum circuit breaker may be provided with an interlock device to prevent the breaker body from being accidentally moved with respect to the cradle when the breaker body is inserted.

By the way, in the conventional vacuum circuit breaker, the components of the interlock device are welded, which not only takes a lot of time during welding, but also causes deformation of components due to high heat by welding.

Accordingly, the present invention relates to an interlock device of a vacuum circuit breaker that can reduce the welding location, shorten the manufacturing time, and reduce the manufacturing cost.

The present invention, in order to achieve the object as described above, the frame is disposed on the circuit breaker main body; A change lever coupled to the frame to interlock the closing position and blocking position in conjunction with closing and closing operations of the breaker main body; An interlock bar coupled to the frame to be elevated; An interlock lever rotatably coupled to the frame and connected to one side of the interlock bar to lift the interlock bar; And a locking unit disposed between the change lever and the interlock lever, the locking unit pivoting between a locking position for suppressing the rise of the interlock lever and a release position for raising the interlock lever by the change lever. To provide an interlock device.

Here, the change lever and the connecting pin is formed on any one of the locking unit, it may be configured to include a pin receiving portion formed on the other to accommodate the connection pin.

The connection pin may be formed in the locking unit, and the pin accommodation portion may be formed in the change lever.

The pin accommodation portion may be formed so that one side is open so that the pin can be inserted from one side along the longitudinal direction of the change lever.

The frame may include a top plate part and a bottom plate part spaced up and down, a side plate part disposed between the top plate part and the bottom plate part, and the interlock lever may be coupled to the bottom plate part.

The bottom plate portion may include a support member for supporting the interlock lever, and the support member may be coupled to the bottom plate portion.

The bottom plate may be provided with a guide for guiding the lifting and lowering of the interlock bar.

The upper plate part may include a locking unit support part for supporting the locking unit, and the locking unit support part may include a rotation shaft for rotatably supporting the locking unit.

 As described above, according to the exemplary embodiment of the present invention, the welding lever can be reduced by configuring the change lever, the interlock bar, the interlock lever, and the locking unit in the frame. Thereby, manufacturing time can be shortened and the component deformation by the high heat which arises at the time of welding can be suppressed.

1 is a perspective view of a state of use of the interlock device of the vacuum circuit breaker according to an embodiment of the present invention;
Figure 2 is a perspective view showing the inside of the breaker body of Figure 1,
3 is an enlarged perspective view of the interlock device of FIG. 2;
4 is an exploded perspective view of the interlock device of FIG. 3;
5 is a view showing a coupled state of the interlock lever of FIG.
6 is a perspective view illustrating a locked state of the locking unit of FIG. 4.

As shown in FIGS. 1 and 2, the vacuum circuit breaker includes a cradle 100 having terminals 110 connected to a bus and a load, and a plurality of terminal connecting portions respectively connected to the terminals 110. 151 may be provided with a circuit breaker body 150 that is coupled to the cradle 100 to be pulled in and out.

The rear wall of the cradle 100 may be provided with a plurality of terminals 110 to be spaced apart in the vertical direction. The terminal 110 may include an upper terminal 111 connected to any one of a bus bar or a load, and a lower terminal 112 connected to the other one of a bus bar or a load.

The rear wall of the cradle 100 may be provided with a shutter 120 to block or open the entrance area of each terminal 110. Shutter driver 130 may be provided on both sidewalls of the cradle 100 to drive the shutter 120 to open and close.

The circuit breaker main body 150 includes a plurality of terminal connection parts 151 connected to and separated from each terminal 110, and a plurality of vacuum interruptions interposed between the terminal connection parts 151 for each phase to open and close power. A VI (vacuum interrupter) 161 and a mechanism unit 171 for providing a driving force to the vacuum interrupter 161 may be provided. Here, the mechanism portion 171 is provided in the front region of the circuit breaker body 150, including a plurality of links, arms, springs, motors, etc. to be able to quickly drive the vacuum interrupter 161. Can be.

The circuit breaker main body 150 has a connection position where the terminal connecting portion 151 is connected to the corresponding terminal 110, and each terminal connecting portion 151 is separated from the corresponding terminal 110 to the front of the cradle 100. It can be moved between the separation position to move apart.

A plurality of wheels 175 may be provided in the lower region of the circuit breaker main body 150 to make contact with the cradle 100 to facilitate forward and backward movement.

Each of the vacuum blocking units 161 may include a case 163 having a vacuum formed therein, a fixed contact unit 165 disposed inside the case 163 and connected to the upper terminal 111, and the It may be configured to include a movable contact portion 167 disposed in the case 163 so as to be liftable and in contact with and separated from the fixed contact portion 165.

On the other hand, the circuit breaker main body 150 and the cradle 100 in the vacuum according to an embodiment of the present invention to prevent the breaker body 150 is coupled to the cradle 100 to be moved unintentionally in the connection position An interlock device 180 of the breaker may be provided.

2 to 4, the interlock device 180 of the vacuum circuit breaker includes a frame 181 in which a circuit breaker main body 150 is disposed at an upper side thereof; A change lever 211 coupled to the frame 181 to interlock and rotate the input position and the blocking position in conjunction with the closing and closing operation of the breaker main body 150; An interlock bar 221 coupled to the frame 181 to be elevated; An interlock lever 231 rotatably coupled to the frame 181 and connected to one side of the interlock bar 221 to elevate the interlock bar 221; And a locking position disposed between the change lever 211 and the interlock lever 231 to suppress the rise of the interlock lever 231 by the change lever 211 and the rise of the interlock lever 231. It may be configured to include; locking unit 241 for rotating between possible release positions.

 The frame 181 may be coupled to a lower region of the breaker body 150. A plurality of wheels 175 may be provided at both sides of the frame 181, respectively.

More specifically, the frame 181 may include a plurality of side plate portions connecting the upper plate portion 182a and the bottom plate portion 182b to be spaced apart from each other in the vertical direction, and the upper plate portion 182a and the bottom plate portion 182b. 182c).

The upper plate portion 182a and the bottom plate portion 182b may be disposed horizontally, and the side plate portion 182c may be disposed vertically. The bottom plate portion 182b may be coupled to the bottom of the side plate portion 182c. A partition plate 182d may be provided between the side plate portions 182c, the upper plate portion 182a, and the bottom plate portion 182b to partition an inner space.

The electric shaft 191 which transmits the power of the mechanism part 171 of the circuit breaker main body 150 to the vacuum interrupter 161 in the space at the rear side of the partition plate 182d partitioned by the partition plate 182d. It may be provided. The electric shaft 191 may be connected to a plurality of arms and links for transmitting a driving force to each of the movable contact portion 167 of each vacuum cut-off portion 161. The electric shaft 191 has a closing position where each movable contact portion 167 is in contact with the fixed contact portion 165, and the movable contact portion 167 is separated from the fixed contact portion 165. (Or trip) can rotate between positions.

On the other hand, the change lever 211 may be provided on the electric shaft 191. The change lever 211 may be configured such that one end is fixed to the electric shaft 191. As a result, the change lever 211 may be rotated at the same time when the electric shaft 191 rotates. That is, the change lever 211 may rotate between the closing position and the blocking position in conjunction with the rotation of the electric shaft 191. The change lever 211 penetrates the partition plate 182d so that an end portion thereof may be formed in the front space of the partition plate 182d. The through part 184 may be formed to have a long vertical length so that the change lever 211 can rotate.

In the bottom plate portion 182b, the breaker main body 150 may be fixed to the cradle 100 so that the breaker main body 150 can be prevented from being unintentionally moved in the connecting position and the separating position. An interlock bar 221 may be provided. More specifically, the interlock bar 221 protrudes from the bottom of the frame 181 when descending and is inserted into the fixing groove 140 formed in the cradle 100 so that the breaker body 150 is fixed at the corresponding position. can do. As shown in FIG. 1, the fixing groove 140 includes a connection position fixing groove 141 into which the interlock bar 221 is inserted at the connection position of the breaker main body 150, and the breaker main body 150. When the separation position of the interlock bar 221 may be provided with a separation position fixing groove 142 is inserted.

The bottom plate portion 182b may be provided with a guide 184 for guiding the interlock bar 221 to be elevated. The guide 184 may be formed to correspond to the shape of the interlock bar 221. For example, the guide 184 may be formed in a cylindrical shape. The guide 184 may be fixed to the bottom plate 182b by welding or the like.

As shown in FIG. 2, a return spring 223 may be provided on the upper side of the interlock bar 221 to apply an elastic force to allow the interlock bar 221 to descend. An upper side of the interlock bar 221 may be provided with an action rod 225 having a lower end in contact with the interlock bar 221 and capable of lifting up and down. The return spring 223 may be configured to press the acting rod 225 downward so that the acting rod 225 presses the interlock bar 221 downward.

One side of the interlock bar 221 may be provided with an interlock lever 231 for elevating the interlock bar 221. The interlock lever 231 may be rotated along the vertical direction of the frame 181. The interlock lever 231 may be provided with a handle 235 to manually rotate. The handle 235 may be configured to protrude toward the front of the frame 181.

The bottom plate 182b may be provided with a supporting member 185 for rotatably supporting the interlock lever 231. The support member 185 may be formed in a "U" shape. The support member 185 may be fixed to the upper surface of the bottom plate portion 182b by a plurality of fastening members 187. The interlock lever 231 may be rotatably assembled to the support member 185. For example, the interlock lever 231 may be rotatably coupled to the support member 185 by a bolt 188 and a nut 189. As a result, the welding operation can be eliminated and the installation time of the interlock lever 231 can be shortened.

The interlock bar 221 may be connected to one side of the interlock lever 231. For example, the interlock lever 231 and the interlock bar 221 may be connected to each other by a pin 237. The pin 237 may be configured to penetrate the interlock bar 221 so that one end thereof is inserted into the interlock lever 231. To this end, pin holes 222 and 236 may be formed in the interlock bar 221 and the interlock lever 231 so that the pins 237 may be inserted, respectively. As a result, when the interlock lever 231 is rotated upward, the interlock bar 221 is lifted up and separated from the fixing groove 140 formed in the cradle 100 so that the breaker body 150 may be moved along the front and rear directions. Can be.

On the other hand, the locking unit 241 for suppressing the upward rotation of the interlock lever 231 may be provided on the upper side of the interlock lever 231. The locking unit 241 may be configured to be rotatable between a locking position that prevents the interlock lever 231 from rotating upward and a release position that allows the interlock lever 231 to rotate upward.

The locking unit 241 may be configured to be interlocked with the change lever 211. More specifically, the locking unit 241 may be configured to be rotated by the change lever 211. One of the change lever 211 and the locking unit 241 may be provided with a connection pin 243, and the other may have a connection pin accommodation portion 215. In this embodiment, a case in which the connecting pin 243 is formed in the locking unit 241 and the connecting pin accommodation portion 215 is formed in the change lever 211 will be described.

The connection pin receiving portion 215 may be formed at an end of the change lever 211. An opening 217 may be formed at one side of the connection pin accommodation portion 215 so that the connection pin 243 may be inserted.

The frame 181 may be provided with a locking unit support part 251 for rotatably supporting the locking unit 241. The locking unit support part 251 may be provided on a bottom surface of the upper plate part 182a. The locking unit support part 251 may be coupled by a plurality of fastening members.

The locking unit support part 251 may be provided with a rotation shaft 253 for rotatably supporting the locking unit 241. The locking unit 241 may be formed with a shaft accommodating portion 245 so that the rotation shaft 253 can be accommodated in a relative rotation. The pivot shaft 253 may be formed to protrude to one side of the shaft receiving portion 245. A groove 255 may be formed at an end portion of the rotation shaft 253 so that the stop ring 257 may be coupled to suppress the detachment of the locking unit 241.

A stop 247 protruding toward the interlock lever 231 may be formed at the bottom of the locking unit 241. After the change lever 211 is rotated to the input position, the stop part 247 protrudes upward of the interlock lever 231 to suppress the rising of the interlock lever 231 as shown in FIG. 6. Done. Here, the stop portion 247 may be configured to be in contact with the interlock lever 231 or spaced apart at a fine interval at the closing position of the change lever 211. As a result, the upward rotation of the interlock lever 231 is suppressed and the interlock bar 221 is prevented from being separated from the connection position fixing groove 141, so that the breaker main body 150 is powered on. It is possible to prevent the breaker body 150 from being accidentally drawn out.

By this configuration, when the breaker body 150 is coupled to the cradle 100 and positioned in the separation position, the interlock bar 221 is pressed downward by the elastic force of the return spring 223 and the frame 181. Protruding to the bottom of the), the end of the protruding interlock bar 221 is inserted into the separation position fixing groove 142. As a result, the breaker body 150 may be fixed to the separation position.

In order to move the circuit breaker main body 150 to a connection position, when the handle 235 of the interlock lever 231 is lifted and lifted up, the interlock lever 231 is rotated upward, and the interlock bar ( 221 is separated from the separation position fixing groove 142. At this time, when the circuit breaker main body 150 is pressed backward, the circuit breaker main body 150 is moved to the rear region, and each terminal connection part 151 of the circuit breaker main body 150 is connected to the corresponding terminal 110.

When the breaker main body 150 is located in the connecting position, the interlock bar 221 is pressed down by the elastic force of the return spring 223, and the end is inserted into the connection position fixing groove 141 to The position of the breaker main body 150 is prevented. At this time, the interlock bar 221 is in a state capable of lifting by the interlock lever 231.

On the other hand, when the breaker main body 150 is to supply power to the load side from the connection position, the electric shaft 191 is rotated to the input position by the mechanism portion 171 of the breaker body 150. When the electric shaft 191 is rotated to the input position, the change lever 211 is rotated to the lower side in the drawing. When the change lever 211 is rotated downward to the input position, the locking unit 241 is rotated downward to the locked position, the stop 247 of the locking unit 241 is the interlock, as shown in FIG. It is located above the lever 231. At this time, the stopper 247 is in contact with the interlock lever 231 when the interlock lever 231 is rotated upward to suppress the upward rotation of the interlock lever 231. As a result, the interlock bar 221 can be prevented from being separated from the connection position fixing groove 141.

When the breaker main body 150 is blocked (or tripped), the electric shaft 191 is rotated to the cutoff position (or trip position) by the driving force of the mechanism part 171, and at this time, the change lever 211 is The blocking position, that is, upwardly rotated in the drawing. When the change lever 211 is rotated upward, the locking unit 241 is rotated upward to the release position. When the locking unit 241 is rotated to the release position, the stop part 247 is moved from the interlock lever 231. The interlock lever 231 is spaced apart so that upward rotation is possible.

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.

100: cradle 110: terminal
120: shutter 140: fixed groove
150: circuit breaker main body 151: terminal connection
161: vacuum interrupter 171: mechanical part
180: interlock device 181: frame
211: change lever 215: connection pin receiving portion
217: opening 221: interlock bar
222, 236: pin ball 231: interlock lever
235 handle 237 pin
241: locking unit 243: connecting pin
245: shaft receiving part 247: stop part
251: locking unit support 253: rotating shaft

Claims (8)

A frame in which the breaker body is disposed above;
A change lever coupled to the frame to interlock the closing position and blocking position in conjunction with closing and closing operations of the breaker main body;
An interlock bar coupled to the frame to be elevated;
An interlock lever rotatably coupled to the frame and connected to one side of the interlock bar to lift the interlock bar; And
A locking unit disposed between the change lever and the interlock lever, the locking unit pivoting between a locking position for suppressing the rise of the interlock lever and a release position for raising the interlock lever by the change lever. Interlock device. The method of claim 1,
An interlock device of a vacuum circuit breaker including a connection pin formed on one of the change lever and the locking unit, and a pin accommodation portion formed on the other to accommodate the connection pin. The method of claim 2,
The connecting pin is formed in the locking unit, the pin receiving portion is interlock device of the vacuum circuit breaker, characterized in that formed on the change lever. The method of claim 3,
The pin receiving portion is interlock device of the vacuum circuit breaker, characterized in that the one side is formed to be open so that the pin can be inserted from one side along the longitudinal direction of the change lever. The method according to any one of claims 1 to 4,
The frame has an upper plate portion and a bottom plate portion spaced apart up and down, the side plate portion disposed between the upper plate portion and the bottom plate portion, the interlock lever is interlock device of the vacuum circuit breaker, characterized in that coupled to the bottom plate portion. The method of claim 5,
The bottom plate portion is provided with a support member for supporting the interlock lever, the support member is interlock device of the vacuum circuit breaker, characterized in that coupled to the bottom plate portion. The method of claim 5,
The bottom plate portion of the interlock device of the vacuum circuit breaker, characterized in that the guide for guiding the lifting of the interlock bar. The method of claim 5,
The upper plate portion is provided with a locking unit support portion for supporting the locking unit, the locking unit support portion is provided with a rotating shaft for supporting the locking unit rotatably interlock device of the vacuum circuit breaker.
KR1020100004904A 2010-01-19 2010-01-19 Interlock apparatus for vacuum circuit breaker KR101071097B1 (en)

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Application Number Priority Date Filing Date Title
KR1020100004904A KR101071097B1 (en) 2010-01-19 2010-01-19 Interlock apparatus for vacuum circuit breaker

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Application Number Priority Date Filing Date Title
KR1020100004904A KR101071097B1 (en) 2010-01-19 2010-01-19 Interlock apparatus for vacuum circuit breaker

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KR20110085234A true KR20110085234A (en) 2011-07-27
KR101071097B1 KR101071097B1 (en) 2011-10-10

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101158645B1 (en) * 2011-02-24 2012-06-26 엘에스산전 주식회사 A circuit braker having cradle
KR101494793B1 (en) * 2013-12-16 2015-02-23 엘에스산전 주식회사 Interlock Device of Vacuum Circuit Breaker
US9425590B2 (en) 2013-12-16 2016-08-23 Lsis Co., Ltd. Withdrawable-type circuit breaker
KR20160127894A (en) * 2015-04-27 2016-11-07 엘에스산전 주식회사 Interlock device for vacuum circuit breaker
KR20220128799A (en) * 2021-03-15 2022-09-22 엘에스일렉트릭(주) Interlock apparatus and vacuum circuit breaker including the same

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101261968B1 (en) 2011-12-30 2013-05-09 엘에스산전 주식회사 Vacuum circuit breaker with interlock apparatus
KR102082993B1 (en) * 2016-07-07 2020-02-28 현대일렉트릭앤에너지시스템(주) Interlock device for circuit breaker

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR200401663Y1 (en) 2005-08-22 2005-11-21 엘에스산전 주식회사 Apparatus for Locking of Vacuum Cricuit Breaker
KR100854382B1 (en) 2007-03-08 2008-08-26 엘에스산전 주식회사 Circuit breaker

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101158645B1 (en) * 2011-02-24 2012-06-26 엘에스산전 주식회사 A circuit braker having cradle
KR101494793B1 (en) * 2013-12-16 2015-02-23 엘에스산전 주식회사 Interlock Device of Vacuum Circuit Breaker
US9425590B2 (en) 2013-12-16 2016-08-23 Lsis Co., Ltd. Withdrawable-type circuit breaker
KR20160127894A (en) * 2015-04-27 2016-11-07 엘에스산전 주식회사 Interlock device for vacuum circuit breaker
KR20220128799A (en) * 2021-03-15 2022-09-22 엘에스일렉트릭(주) Interlock apparatus and vacuum circuit breaker including the same

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