KR101734047B1 - Air circuit breaker - Google Patents

Air circuit breaker Download PDF

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Publication number
KR101734047B1
KR101734047B1 KR1020150062620A KR20150062620A KR101734047B1 KR 101734047 B1 KR101734047 B1 KR 101734047B1 KR 1020150062620 A KR1020150062620 A KR 1020150062620A KR 20150062620 A KR20150062620 A KR 20150062620A KR 101734047 B1 KR101734047 B1 KR 101734047B1
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KR
South Korea
Prior art keywords
latch holder
inertia
latch
connection member
inertia latch
Prior art date
Application number
KR1020150062620A
Other languages
Korean (ko)
Other versions
KR20160130902A (en
Inventor
유재구
Original Assignee
현대일렉트릭앤에너지시스템(주)
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by 현대일렉트릭앤에너지시스템(주) filed Critical 현대일렉트릭앤에너지시스템(주)
Priority to KR1020150062620A priority Critical patent/KR101734047B1/en
Priority to CN201610289412.0A priority patent/CN106128874B/en
Publication of KR20160130902A publication Critical patent/KR20160130902A/en
Application granted granted Critical
Publication of KR101734047B1 publication Critical patent/KR101734047B1/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H31/00—Air-break switches for high tension without arc-extinguishing or arc-preventing means
    • H01H31/26—Air-break switches for high tension without arc-extinguishing or arc-preventing means with movable contact that remains electrically connected to one line in open position of switch
    • H01H31/28—Air-break switches for high tension without arc-extinguishing or arc-preventing means with movable contact that remains electrically connected to one line in open position of switch with angularly-movable contact
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/22—Power arrangements internal to the switch for operating the driving mechanism
    • H01H3/28—Power arrangements internal to the switch for operating the driving mechanism using electromagnet
    • 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
    • H01H33/02—Details
    • H01H33/28—Power arrangements internal to the switch for operating the driving mechanism
    • H01H33/38—Power arrangements internal to the switch for operating the driving mechanism using electromagnet
    • 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
    • H01H33/02—Details
    • H01H33/46—Interlocking mechanisms
    • H01H33/48—Interlocking mechanisms for interlocking between casing or cover and mechanism for operating contacts

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)

Abstract

A rotation shaft connected to the connection member and rotated to input or shut off the connection member, and a connection member driving unit connected to the connection member driving unit for inputting or blocking the connection member and driven in conjunction with the rotation shaft, And a second latch holder unit arranged to be spaced apart from the connection member driving unit and interlocked with the rotation shaft to prevent the connection member from being re-inserted during the closing operation, A breaker is initiated.

Figure R1020150062620

Description

Breaker {AIR CIRCUIT BREAKER}

The present invention relates to a circuit breaker.

Generally, a breaker is an industrial power device that automatically cuts off a line when a fault current such as an overcurrent or a short-circuit current occurs in a transmission line having a relatively low voltage, and extinguishes an arc generated when the line is broken by using compressed air.

The breaker largely performs a closing operation for closing the energizing circuit and a closing operation for opening the energizing circuit. The closing and closing operation of the circuit breaker is generally performed automatically or according to the user's selection according to the state of the energizing circuit.

On the other hand, the connection member is formed to have a large mass, and when the load current flows only in a normal state and a large current such as a short-circuit fault current flows, the connection member performs a shutoff operation.

At this time, the mechanism performs a forced shut-off operation, and the connection member tries to move in the opposite direction again due to the impact that the connecting member hits during the shutting operation of the connecting member due to the reaction reaction due to the movement of the connecting member having a large mass.

When the connecting member moves again in the opposite direction, the reclosing causes a reclosing operation, and the connecting member can not be disconnected, resulting in secondary burning such as fire or load burn-out.

Furthermore, there is a problem that a plurality of connecting members may be provided, and a risk of re-visit may arise due to recurrence caused by moving the connecting member, which is disposed away from the connecting member driving unit, in the opposite direction in the closing operation.

Korean Registered Patent No. 1191571

There is provided a circuit breaker capable of preventing the connecting member from returning to the energized state again during the breaking operation.

The circuit breaker according to an embodiment of the present invention includes a rotation shaft connected to a connection member and rotated to input or shut off the connection member, and a connection member driving unit disposed adjacent to the connection member driving unit for inputting or blocking the connection member, A first latch holder unit which is driven to be connected to the connection member driving unit so as to prevent the connection member from being re-inputted during a closing operation, and a second latch holder unit which is arranged to be spaced apart from the connection member driving unit and is interlocked with the rotation shaft to prevent the connection member from being re- And a second latch holder unit for holding the second latch holder unit.

The first latch holder unit includes a first inertia latch installed on the rotary shaft and rotated in conjunction with the rotary shaft, a first support pin secured to the side wall member of the connection member driving unit so as to be disposed parallel to the rotary shaft, A first inertial latch holder rotatably mounted on the support pin, and a first inertial latch holder spring connected to the first support pin to restore the first inertial latch holder to its original position.

The first inertial latch may include a first insert bar inserted into the first insertion slot of the first inertial latch holder.

The first inertia latch may include a first push portion formed to be stepped on the first insert bar and in line contact with the first protrusion of the first inertia latch holder upon rotation.

The second latch holder unit includes a second inertia latch which is installed on the rotary shaft so as to be spaced apart from the first latch holder unit and rotates in conjunction with the rotary shaft and a second inertia latch fixed to the mounting base of the second body so as to be disposed parallel to the rotary shaft. A second inertia latch holder rotatably mounted on the second support pin, and a second inertia latch holder spring connected to the second support pin for restoring the second inertia latch holder to an original position, .

The second inertia latch may include a second insert bar inserted into the second insert groove of the second inertia latch holder.

The second inertia latch may include a second push portion formed to be stepped on the second insert bar and linearly contacting the second projection of the second inertia latch holder when the second inertia latch rotates.

There is an effect that it is possible to prevent the connecting member from returning to the energized state again in the blocking operation.

1 is a schematic perspective view showing the inside of a circuit breaker according to an embodiment of the present invention.
2 is an enlarged view showing part A of Fig.
3 is an enlarged view showing part B of Fig.
4 is a block diagram illustrating a circuit breaker according to an embodiment of the present invention.
5 to 9 are explanatory diagrams for explaining the operation of the latch holder unit of the circuit breaker according to the embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. However, the embodiments of the present invention can be modified into various other forms, and the scope of the present invention is not limited to the embodiments described below. Further, the embodiments of the present invention are provided to more fully explain the present invention to those skilled in the art. The shape and size of elements in the drawings may be exaggerated for clarity.

1 is an enlarged view showing part A of FIG. 1, FIG. 3 is an enlarged view showing part B of FIG. 1, and FIG. 4 is an enlarged view of part 1 is a configuration diagram illustrating a circuit breaker according to an embodiment of the present invention.

1 to 4, a circuit breaker 100 according to an embodiment of the present invention may include a rotating shaft 120, a first latch holder unit 130, and a second latch holder unit 140 have.

The circuit breaker 100 includes a connection member driving unit 110 and the connection member driving unit 110 includes components having a power transmission structure to the connection member 112 to connect the connection member 112 to the electrode bar ) Or transmits a driving force to disconnect the connecting member 112 from the electrode bar when a fault current is generated.

Further, the connection member driving unit 110 is installed in the first main body 102.

The rotation shaft 120 is connected to the connection member driving unit 110 and is arranged to be exposed to the outside from the side wall member 114 of the connection member driving unit 110. The rotating shaft 120 is connected to the connecting member 112 through the first link member 116 and the rotating member 118 to which the first link member 116 is attached is fixedly mounted on the rotating shaft 120.

The rotating shaft 120 is connected to the plurality of connecting members 112 disposed on the first body 102 and the second body 104 and rotated to perform the closing and closing operations of the plurality of connecting members 112 .

The first latch holder unit 130 is installed on the rotary shaft 120 and is driven to interlock with the rotary shaft 120 to prevent the connection member 112 from being re-inserted in the blocking operation.

The first latch holder unit 130 may include a first inertia latch 132, a first support plate 134, a first inertia latch holder 136, and a spring 138 for a first inertia latch holder.

The first inertia latch 132 is installed on the rotating shaft 120 and rotates in conjunction with the rotating shaft 120. On the other hand, the first inertia latch 132 is provided with a first insertion bar 132a which is constrained to the first inertia latch holder 136 when it is rotated. The first insertion bar 132a extends in the radial direction from the rotation shaft 120.

The first inertia latch 132 is formed in a stepped manner from the first insert bar 132a and contacts the first inertia latch holder 136 at the time of rotation to rotate the first inertia latch holder 136, And a portion 132b.

That is, the first inertia latch 132 is rotated together with the rotating shaft 120 during the disconnecting operation of the connecting member 112. At this time, the first inertia latch holder 136 is rotated while the first push portion 132b of the first inertia latch 132 pushes the first inertia latch holder 136. The first insertion bar 132a is restrained by the first inertia latch holder 136 to prevent the rotation shaft 120 from rotating in a direction opposite to the direction in which the rotation shaft 120 is rotated by the blocking operation.

The first support pin 134 is fixed to the side wall member 114 of the connection member driving unit 110 so as to be disposed parallel to the rotation axis 120. The first inertia latch holder 136 is rotatably mounted on the first support pin 134. When the first inertia latch holder spring 138 is connected to the first support pin 134 so that the first inertia latch holder 136 is rotated by the first inertia latch holder spring 138 when the external force is removed, .

The first inertial latch holder 136 is rotatably mounted on the first support pin 134 and is rotated by the first inertial latch 132 and the spring 138 for the first inertial latch holder.

The first inertial latch holder 136 is provided with a first insertion groove 136a through which the first insertion bar 132a provided in the first inertial latch 132 is inserted. The first inertia latch holder 136 may be provided with a first protrusion 136b contacting the first push portion 132b of the first inertia latch 132. [

That is, when the rotating shaft 120 rotates for the disconnecting operation of the connecting member 112, the first inertial latch 132 rotates together with the rotating shaft 120. The first pushing part 132b of the first inertia latch 132 first contacts the first protrusion 136b of the first inertia latch holder 136 so that the first inertia latch holder 136 is in contact with the first inertia latch 136, (Not shown). Accordingly, the first insertion bar 132a of the first inertia latch 132 is inserted into the first insertion groove 136a.

The first insertion bar 132a of the first inertial latch 132 is inserted into the first insertion groove 136a of the first inertial latch holder 136 and is inserted into the first inertial latch 132 in the direction opposite to the first inertial latch 132 Prevent rotation. Accordingly, when the connection member 112 is moved in the direction in which the connection member 112 is inserted due to the repulsive force, the first inertia latch 132 prevents the rotation shaft 120 from rotating in the direction opposite to the rotation direction of the cutoff operation .

The spring 138 for the first inertial latch holder is connected to the support pin 134 to restore the first inertial latch holder 136 to its original position. That is, when the external force is removed, the spring 138 for the first inertial latch holder rotates the first inertial latch holder 136 in the counterclockwise direction to move the first inertial latch holder 136 to the first position So that the inertial latch holder 136 is disposed.

The second latch holder unit 140 is disposed to be disposed in the second body 104 and is driven to interlock with the rotation shaft 120 to prevent the connection member 112 from being re-inserted in the blocking operation.

That is, the second latch holder unit 140 plays a role of preventing re-input by the repulsive force applied to the connecting member 112 disposed away from the connecting member driving unit 110 in the blocking operation. In other words, when only the first latch holder unit 130 is provided, there is a risk that the connecting member 112 disposed far from the connecting member driving unit 110 is re-inserted by the repulsive force generated in the closing operation. In order to prevent this, the second latch holder unit 140 is installed in the second body 104.

The second latch holder unit 140 may also include a second inertial latch 142, a second support plate 144, a second inertial latch holder 146 and a second inertial latch holder spring 148 . However, the second support pin 144 is installed on the mounting base 104a of the second main body 104. [

The second inertia latch 142, the second support plate 144, the second inertia latch holder 146 and the spring 148 for the second inertia latch holder except for the first inertia latch 132, 1 support pin 134, the first inertial latch holder 136, and the first inertial latch holder spring 138, the detailed description thereof will be omitted.

As described above, it is possible to prevent the plurality of connection members 110 from returning to the energized state again during the cut-off operation through the first and second latch holder units 130 and 140.

As a result, the plurality of connecting members 110 are returned to the energized state during the cutoff operation, and recurrence is caused by recurrence, thereby preventing secondary burnout such as fire and load burnout.

Hereinafter, operation of the circuit breaker according to an embodiment of the present invention will be described with reference to the drawings.

5 to 9 are explanatory diagrams for explaining the operation of the circuit breaker according to an embodiment of the present invention.

However, since the operation of the first and second latch holder units 130 and 140 is realized by the same mechanism, the operation of the first latch holder unit 130 will be described below.

5, when the connecting member 110 is in the energized state, the first inertia latch 132 provided on the rotating shaft 120 is disposed in a state spaced apart from the first inertia latch holder 136 do.

6 to 8, when the shutting operation of the connecting member 110 is performed, the rotating shaft 120 is rotated counterclockwise, and the first inertia latch 132 is rotated in the counterclockwise direction 120).

The first pushing part 132b of the first inertia latch 132 contacts the first protrusion 136b of the first inertia latch holder 136 to rotate the first inertia latch holder 136. [ When the first inertial latch holder 136 is rotated as described above, the first insertion bar 132a of the first inertial latch 132 is inserted into the first insertion groove 136a of the first inertial latch holder 136. [

Accordingly, even when the rotating shaft 120 is to be rotated in the clockwise direction, the first inertia latch holder 136 interferes with the clockwise rotation of the first inertia latch 132, so that the rotation of the rotating shaft 120 is prevented It can be.

Thereafter, when the external force is removed, as shown in Fig. 9, the first inertia latch holder 136 is rotated clockwise. At this time, the first inertial latch holder 136 is rotated by the spring 138 for the first inertial latch holder. This prevents the first inertia latch 132 from being restrained by the first inertia latch holder 136 when the rotary shaft 120 rotates clockwise.

As described above, it is possible to prevent the plurality of connection members 110 from returning to the energized state again during the cut-off operation through the first and second latch holder units 130 and 140.

As a result, the plurality of connecting members 110 are returned to the energized state during the cutoff operation, and recurrence is caused by recurrence, thereby preventing secondary burnout such as fire and load burnout.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It will be obvious to those of ordinary skill in the art.

100: Breaker
120:
130: first latch holder unit
140: Second latch holder unit

Claims (7)

A rotating shaft connected to the connecting member and rotated to insert or block the connecting member;
A first latch holder unit disposed adjacent to a connection member driving unit for inputting or blocking the connection member and driven in association with the rotation axis to prevent the connection member from being re-inserted during a blocking operation; And
A second latch holder unit arranged to be spaced apart from the connection member driving unit and driven in conjunction with the rotation shaft to prevent the connection member from being re-inserted in the blocking operation;
.
2. The apparatus of claim 1, wherein the first latch holder unit
A first inertia latch installed on the rotary shaft and rotated in association with the rotary shaft;
A first support pin fixed to the side wall member of the connection member driving unit so as to be disposed parallel to the rotation axis;
A first inertia latch holder rotatably mounted on the first support pin; And
A first inertia latch holder spring connected to the first support pin to restore the first inertia latch holder to its original position;
.
3. The method of claim 2,
Wherein the first inertial latch has a first insert bar inserted into a first insertion slot of the first inertial latch holder.
The method of claim 3,
Wherein the first inertia latch comprises a first push portion formed to be stepped on the first insert bar and in line contact with a first projection of the first inertia latch holder upon rotation.
2. The apparatus of claim 1, wherein the second latch holder unit
A second inertia latch installed on the rotary shaft so as to be spaced apart from the first latch holder unit and rotated in association with the rotary shaft;
A second support pin fixedly installed on a mounting base of the second body so as to be disposed parallel to the rotation axis;
A second inertia latch holder rotatably installed on the second support pin; And
A second inertia latch holder spring connected to the second support pin to restore the second inertia catch holder to its original position;
.
6. The method of claim 5,
And the second inertia latch includes a second insert bar inserted into the second insert groove of the second inertia latch holder.
The method according to claim 6,
And the second inertia latch has a second push portion formed to be stepped on the second insert bar and linearly contacting the second projection of the second inertia latch holder upon rotation.
KR1020150062620A 2015-05-04 2015-05-04 Air circuit breaker KR101734047B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
KR1020150062620A KR101734047B1 (en) 2015-05-04 2015-05-04 Air circuit breaker
CN201610289412.0A CN106128874B (en) 2015-05-04 2016-05-04 Breaker

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020150062620A KR101734047B1 (en) 2015-05-04 2015-05-04 Air circuit breaker

Publications (2)

Publication Number Publication Date
KR20160130902A KR20160130902A (en) 2016-11-15
KR101734047B1 true KR101734047B1 (en) 2017-05-15

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100771922B1 (en) 2006-10-17 2007-11-01 엘에스산전 주식회사 Air circuit breaker

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101191571B1 (en) 2011-06-08 2012-10-15 엘에스산전 주식회사 An air circuit breaker

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100771922B1 (en) 2006-10-17 2007-11-01 엘에스산전 주식회사 Air circuit breaker

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KR20160130902A (en) 2016-11-15

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