CN102129941B - Circuit breaker - Google Patents
Circuit breaker Download PDFInfo
- Publication number
- CN102129941B CN102129941B CN201010268569.8A CN201010268569A CN102129941B CN 102129941 B CN102129941 B CN 102129941B CN 201010268569 A CN201010268569 A CN 201010268569A CN 102129941 B CN102129941 B CN 102129941B
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- China
- Prior art keywords
- chain shot
- lock part
- circuit
- plunger
- breaker
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- Legal status (The legal status 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 status listed.)
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/50—Manual reset mechanisms which may be also used for manual release
- H01H71/505—Latching devices between operating and release mechanism
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/12—Automatic release mechanisms with or without manual release
- H01H71/123—Automatic release mechanisms with or without manual release using a solid-state trip unit
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/12—Automatic release mechanisms with or without manual release
- H01H71/24—Electromagnetic mechanisms
- H01H71/2463—Electromagnetic mechanisms with plunger type armatures
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/50—Manual reset mechanisms which may be also used for manual release
- H01H71/52—Manual reset mechanisms which may be also used for manual release actuated by lever
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
- H01H73/02—Details
- H01H73/04—Contacts
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Breakers (AREA)
Abstract
A task of the invention is to settle easy arcing and circuit breaking performance if tripping circuit breaking time of a switch mechanism in a circuit breaker is longer and a movable contactor gets next to a contactor through the force generated by a compressed spring in a plunger and a reset spring of the movable contactor after the movable contactor is tripped compulsively through the plunger. The invention provides a circuit breaker which is composed of the following components: a plunger (31), an insulation rod (32), a movable contactor (4) which is provided with a movable contact (4b), a fixed contactor which is provided with a fixed contact (3b), a transverse rod, a pressure spring, a locking part, a latch, and a toggle rod mechanism, which form an instantaneous tripping part of the movable contactor. When the plunger (31) drives, through the impact between the locking part (21) and the latch (22), the rotation speed of the latch (22) is increased thereby shortening the tripping short-circuit time of the whole mechanism.
Description
Technical field
The present invention relates to a kind of circuit-breaker, especially, relate to a kind of switching mechanism portion of circuit-breaker.
Background technology
Switching mechanism portion as circuit-breaker, for example, in the existing circuit-breaker of recording at patent documentation 1, the solenoid of movable contact tripping operation is consisted of coil and plunger, in coil, flow through as short circuit current be more than or equal to the electric current of specified several times time, by the action of solenoid part, first one end of plunger drives tripping operation part, the connecting rod disengaging that makes chain shot connecting rod and link, thus movable contact is forced to tripping operation.Because chain shot departs from advance, so linkage portion moves, by making movable contact be positioned at the action of off position, complete the action of opening circuit.
Patent documentation 1: Japanese Patent Publication 59-42938 communique (2-3 page, Fig. 1)
Summary of the invention
The switching mechanism portion traveling time that whole time of opening circuit is tripping operation part, chain shot connecting rod, the connecting rod that links that trips, the breaking time of definite switching mechanism such as the moment of inertia by all parts, quality, back-moving spring power portion.In the structure of the switching mechanism portion of above-mentioned existing circuit-breaker, with respect to making movable contact force the time of tripping operation, significantly postpone the breaking time of linkage portion.Therefore, owing to utilizing plunger that movable contact is forced after tripping operation, if the current vanishes of actuation plunger, the confining force to movable contact being produced by plunger disappears, the power that back-moving spring by the Compress Spring in plunger and movable contact produces, make movable contact approach fixed contact therefor, easily produce reignition of arc, so produce the problem that opening performance reduces.
The present invention proposes in order to solve above-mentioned problem, and its object is to obtain a kind of circuit-breaker, breaking time when it shortens tripping operation, improves opening performance.
Circuit-breaker involved in the present invention, when short interruption, after utilizing plunger actuation and insulating bar that movable contact is separated, drive lock part, remove with chain shot between engage after, lock part is contacted with chain shot, apply torque, improve thus the rotary speed of chain shot.
The effect of invention
According to the present invention, can obtain a kind of circuit-breaker, it is by improving the rotary speed of chain shot, thus the breaking time while shortening tripping operation, raising opening performance.
Accompanying drawing explanation
Fig. 1 means the oblique view of the outward appearance of the circuit-breaker in embodiments of the present invention 1.
Fig. 2 means the side cutaway view of the on-state of the circuit-breaker in embodiments of the present invention 1.
Fig. 3 is the profile of the switching mechanism portion that comprises lock part and chain shot of the on-state in embodiments of the present invention 1.
Fig. 4 is the open circuit profile of the switching mechanism portion that comprises lock part and chain shot of moment of the tripping operation in embodiments of the present invention 1.
Fig. 5 is lock part under the on-state of the circuit-breaker in embodiments of the present invention 1 and the oblique view of chain shot.
Fig. 6 is the open circuit lock part of moment and the oblique view of chain shot of the tripping operation of the circuit-breaker in embodiments of the present invention 1.
Fig. 7 means in the situation that the lock part rotation of embodiments of the present invention 1 contact with chain shot time, the sequential chart of the action timing of main switching mechanism parts.
Fig. 8 means in the situation that the lock part rotation of embodiments of the present invention 1 contact with chain shot time, mainly the sequential chart of the action of switching mechanism parts timing.
Fig. 9 is the profile of switching mechanism portion, and the on-state of the circuit-breaker in embodiments of the present invention 1 is shown.
Figure 10 is the profile of switching mechanism portion, and the off-state of the circuit-breaker in embodiments of the present invention 1 is shown.
Figure 11 is the profile of switching mechanism portion, and the tripped condition of the circuit-breaker in embodiments of the present invention 1 is shown.
Figure 12 is the profile of switching mechanism portion, and the reset mode of the circuit-breaker in embodiments of the present invention 1 is shown.
Figure 13 is the open circuit lock part of moment and the profile of chain shot of the tripping operation in embodiments of the present invention 1.
Figure 14 is lock part under the reset mode in embodiments of the present invention 1 and the profile of chain shot.
Figure 15 is the oblique view under the on-state of the related lock part of embodiments of the present invention 2 and chain shot bend.
Figure 16 is the oblique view of tripping operation moment of the related lock part of embodiments of the present invention 2 and chain shot bend.
Embodiment
Fig. 1 means the oblique view of the outward appearance of the circuit-breaker in embodiments of the present invention 1, Fig. 2 means the side cutaway view of the on-state of the circuit-breaker in embodiments of the present invention 1, Fig. 3 is the profile of the switching mechanism portion that comprises lock part and chain shot of the on-state in embodiments of the present invention 1, Fig. 4 is the open circuit profile of the switching mechanism portion that comprises lock part and chain shot of moment of the tripping operation in embodiments of the present invention 1, Fig. 5 is lock part under the on-state of the circuit-breaker in embodiments of the present invention 1 and the oblique view of chain shot, Fig. 6 is the open circuit lock part of moment and the oblique view of chain shot of the tripping operation of the circuit-breaker in embodiments of the present invention 1.
In Fig. 1, circuit-breaker becomes following structure, that is, by resinous lid 1 and resinous pedestal 2, covered, and on terminal 24, connects distribution, by handle 16, realizes switching manipulation.
In Fig. 2, breaker body is covered by resinous lid 1 and resinous pedestal 2, is provided with fixed contact 3a on fixed contact therefor 3.The movable contact 4 relatively configuring with fixed contact therefor 3 can be rotated centered by pivot point 4a, contacts/separated by rotating with fixed contact therefor 3.When movable contact 4 contacts with fixed contact therefor 3, the fixed contact 3a being arranged on fixed contact therefor 3 contacts with the moving contact 4b being arranged on movable contact 4.Muffler plate 5 is arranged near fixed contact therefor 3 and movable contact 4, maintaining on the insulation cross bar 6 of movable contact 4, is provided with rotating shaft 6a.In the figure of lower link 9, right part is by connecting pin 8 and 6 combinations of insulation cross bar.Upper connecting rod 11, by linking in conjunction with pin 10 and lower link 9, becomes hinge part in conjunction with pin 10, forms elbow-bar mechanism.
Below, action is described.Under on-state in Fig. 2, lower link 9 and upper connecting rod 11 stretch by acting in conjunction with the tensile force from switch spring on pin 10 so that by the pivot of linking part 13a and the upper connecting rod axis linking in conjunction with the central point of pin 10, with by the central point of connecting pin 8 with in conjunction with the lower link axis that the central point of pin 10 links, become roughly straight line.In addition, cross bar 6 is subject to clockwise revolving force in figure centered by rotating shaft 6a, by movable contact 4 by being pressed on fixed contact therefor 3.
Under the on-state shown in Fig. 3, if be more than or equal to the short circuit current of specified several times, flow through coil 26, the magnetic circuit by plunger 31 and yoke 34 starts to right-hand movement in figure plunger 31, first by the setting of the plunger 31 T word shape 31b of the portion hook lock part 21 of left end in the drawings, lock part 21 is counterclockwise rotated in figure, then, utilize right-hand member in the figure of insulating bar 32 to press movable contact 4, by movable contact semi-finals system tripping operation.
Then, as shown in Figure 4, when gap between plunger 31 and yoke 34 disappears, be arranged on lug boss 31a and yoke 34 butts on plunger 31, plunger 31 stops to right-hand movement in figure at this point.On the other hand, movable contact 4 is accelerated by plunger 31 via insulating bar 32, utilizes the kinetic energy of the initial velocity when separated with insulating bar 32 and the balance of the potential energy that Compress Spring 29 is put aside during by Compress Spring 29 compression, separated with fixed contact therefor 3.In fact, when producing short circuit current, in the larger electromagnetic force of plunger 31 upper moments generation, the kinetic energy being formed by the translational speed that comprises insulating bar 32, the potential energy of putting aside with stage clip 29 is compared very large, speed moment of movable contact 4 increases, speed reduce hardly separated with fixed contact therefor 3.
During this period, lock part 21 and chain shot 22 carry out following actions.From the position of Fig. 5, by plunger 31 rotary actuation lock part 21 as noted above, lock part 21 and chain shot 22 in the drawings left end engage releasing, after chain shot can freely rotate, by the rake 21b of lock part 21 and the chain shot pin 22b of chain shot 22, contact, to chain shot 22, apply pressure revolving force thus.Then, chain shot 22 carries out High Rotation Speed and becomes the state shown in Fig. 6.In addition,, when above-mentioned contact, chain shot pin 22b enters in the recess being arranged on rake 21b.Then, in Fig. 2, by chain shot holding section 22c, remove with engaging of lever 13, lever 13 centered by axle 14 to clockwise direction rotation in figure, thereby elbow-bar mechanism is bent into L word shape, cross bar 6 is counterclockwise rotarilyd actuate in figure, thereby trip action.
Above, in the related circuit-breaker of embodiments of the present invention 1, by lock part 21, contact and apply torque with chain shot 22, thereby the rotary speed of chain shot 22 is improved, can shorten the tripping operation operate time of switching mechanism portion.
Below, use Fig. 7 and Fig. 8, be described in detail in the related circuit-breaker of embodiments of the present invention 1, shorten tripping operation this point operate time of switching mechanism portion.Fig. 7 means in the situation that lock part as existing circuit-breaker does not contact with chain shot when rotated, the sequential chart of the action of main switching mechanism parts example regularly, Fig. 8 means in the situation that the lock part of embodiments of the present invention 1 contacts with chain shot when rotated, the sequential chart of the action of main switching mechanism parts example regularly.
As shown in Figure 7, if flow through the short circuit current that is more than or equal to specified several times in coil 26, the mobile moment of plunger 31 carries out, and the displacement x of plunger 31 changes rapidly between the short-term of Δ t1a=1～2ms.Due to the movement at plunger 31 midway, lock part 21 is rotarilyd actuate by plunger 31, so the anglec of rotation (lock part angle) continues to increase.If lock part 21 rotation, with chain shot 22 between engage releasing, the anglec of rotation of chain shot 22 (chain shot angle) also continues to increase.If chain shot 22 rotations, utilize illustrated method above, make lever 13, elbow-bar mechanism be rotated action, realize the action of opening circuit of cross bar 6, the anglec of rotation of cross bar (cross bar angle) also continues to increase.
Here, before the engaging of chain shot 22 and lever 13 is removed, the elbow-bar mechanism action of not tripping, does not carry out opening circuit of cross bar 6.By the moment of inertia of the power being subject to from lever 13 by switch spring and chain shot 22, determined the breaking time of chain shot 22, here, the rotation deadline of chain shot 22 is Δ t2a=4ms, then, midway above-mentioned, the elbow-bar mechanism action of tripping, its result, the time till opening circuit to cross bar 6 is Δ t3a=8ms.
Therefore,, if after lock part 21 rotations, apply revolving force to chain shot 22, the time shorten that can make chain shot 22 rotate, accelerates whole breaking time.The in the situation that of appending chain shot pin 22b on chain shot 22, as shown in explanation above, the revolving force of the stop of self-locking in the future 21 transmits to chain shot 22.Thus, if chain shot traveling time shortens to for example Δ t2b=2ms as shown in Figure 8, the beginning timing advance of moving in the tripping operation of above-mentioned elbow-bar mechanism midway, the time shorten till opening circuit to cross bar 6 is Δ t3b=6ms.
Below, the action of switching mechanism portion when circuit-breaker shifts to on-state, off-state, tripped condition, reset mode is respectively described.Fig. 9 is the profile of switching mechanism portion, the on-state of the circuit-breaker in embodiments of the present invention 1 is shown, Figure 10 is the profile of switching mechanism portion, the off-state of the circuit-breaker in embodiments of the present invention 1 is shown, Figure 11 is the profile of switching mechanism portion, the tripped condition of the circuit-breaker in embodiments of the present invention 1 is shown, Figure 12 is the profile of switching mechanism portion, the reset mode of the circuit-breaker in embodiments of the present invention 1 is shown, Figure 13 is the open circuit lock part of moment and the profile of chain shot of the tripping operation in embodiments of the present invention 1, Figure 14 is lock part under the reset mode in embodiments of the present invention 1 and the profile of chain shot.
Under the on-state shown in Fig. 9, as shown in explanation above, cross bar 6 is subject to centered by rotating shaft 6a along clockwise revolving force in figure, by movable contact 4 by being pressed on fixed contact therefor 3.
Under the off-state shown in Figure 10, to make handle 16 to the situation of rotation counterclockwise figure from on-state, due in conjunction with pin 10 be arranged between the 15b of hook portion in handle arms 15, set up for applying the switch spring of tensile force, so by the effect of this spring line of force, cross bar 6 is along counterclockwise bearing revolving force centered by rotating shaft 6a in figure, movable contact 4 becomes the state separated with fixed contact therefor 3.
If short circuit current flow under the on-state shown in Fig. 9, as shown in explanation above, by the short circuit current checkout gear being formed by coil 26, plunger 31, yoke 34, lock part 21 is counterclockwise rotated centered by axle 21a in figure, thus with chain shot 22 between engage releasing, chain shot 22 starts to clockwise direction rotation in figure.Then, between chain shot 22 and lever 13, engage releasing, the tensile force by switch spring acts on via upper connecting rod 11, thus lever 13 centered by axle 14 to clockwise direction rotation in figure.Accompany therewith, upper connecting rod 11 and lower link 9 are bent into L word shape at the downside of handle 16, and cross bar 6 is counterclockwise rotated driving in the figure of Fig. 9, become the tripped condition shown in Figure 11 (this series of action is generically and collectively referred to as to tripping operation action).
In addition, if from the tripped condition shown in Figure 11, gripping handle 16 is to counterclockwise carrying out rotating operation in figure, and handle arms 15 is in the same manner to counterclockwise driven in figure, by the effect of switch spring, lever 13 counterclockwise rotates centered by axle 14 in figure.Then, by the active force of torsional spring 20, chain shot 22 returns to assigned position to counterclockwise rotating in figure, lock part 21 rotates and returns to assigned position to clockwise direction in figure, lever 13 engages with chain shot 22, chain shot 22 engages with lock part 21, becomes the reset mode shown in Figure 12 (homing action).Here, at chain shot 22 when counterclockwise rotating in figure, although chain shot pin 22b enters the recess of the rake 21b of lock part 21 as shown in Figure 6, if but carried out homing action,, by the effect of torsional spring 20, lock part 21 would be subject to revolving force on clockwise direction in the drawings, chain shot 22 is subject to revolving force in counter clockwise direction in the drawings, on this basis, by chain shot pin 22b, contact with the rake 21b of lock part 21, and become, make the auxiliary force of lock part 21 rotations and apply rotation.
In addition, chain shot pin 22b and lock part 21b are the position relationship shown in Figure 13, and the position that can not interfere while being designed to homing action becomes the position relationship shown in Figure 14 when reset completes.By carrying out above-mentioned action, and carry out the homing action of mechanism, if the active force of handle disappears, become the off-state of Figure 10.
If from this off-state, gripping handle 16 and to counterclockwise carrying out rotating operation in figure, the dead point that switch spring be take from bottom to top by upper connecting rod axis is boundary, the force direction being erected in conjunction with the switch spring on pin 10 reverses again, by wink moving (snap) action that upper connecting rod and lower link are stretched, cross bar 6, to clockwise direction rotating drive in figure, by being pressed on fixed contact therefor 3, is become to the on-state of Fig. 9 by movable contact 4.
According to present embodiment, due to when plunger 31 drives, chain shot pin 22b contacts with the rake 21b of lock part 21, improves the rotary speed of chain shot 22, so shorten the tripping operation breaking time of switching mechanism portion integral body, improves opening performance.
Figure 15 is the related lock part of embodiments of the present invention 2 21 and the oblique view of chain shot bend under on-state, and Figure 16 is that the related lock part of embodiments of the present invention 2 and chain shot bend are at the tripping operation oblique view of moment.Structure for identical with execution mode 1, marks identical label, and description thereof is omitted.
On above-mentioned chain shot 22, bend 22d is set, the chain shot pin 22b collision of the rake 21b of lock part 21 and chain shot 22, can obtain the identical effect of situation as illustrated in execution mode 1.In addition, because bend 22d can be integrally formed by the bending machining of chain shot 22, so can also be saved the effect of assembling man-hour, reducing cost of manufacture.
Claims (3)
1. a circuit-breaker, it has:
Movable contact, it has moving contact;
Fixed contact, it contacts with described moving contact/and separated;
Coil, itself and described fixed contact are electrically connected, and pass into electric current;
Plunger, driven when it passes into short circuit current in described coil;
Insulating bar, it is connected with one end of described plunger, is accompanied by the driving of described plunger and presses described movable contact, and described movable contact is tripped with respect to described fixed contact;
Lock part, it is accompanied by the driving of described plunger and is driven;
Chain shot, its driving by described lock part remove with described lock part between engage, chain shot is free to rotate thus;
Elbow-bar mechanism, itself and lever link, and by utilizing the revolving force being applied by described lock part that described chain shot is rotated after can freely rotating at described chain shot, thereby the engaging between described chain shot and described lever is removed, and described elbow-bar mechanism are crooked; And
Insulation cross bar, itself and described elbow-bar mechanism link, and by the bending of described elbow-bar mechanism, described insulation cross bar is rotated, thereby drives described movable contact,
This circuit-breaker is characterised in that,
At described lock part, be accompanied by the driving of described plunger and when driven, described lock part contacts with described chain shot.
2. circuit-breaker according to claim 1, is characterized in that,
Chain shot pin is set on described chain shot, and the part that described lock part contacts is this chain shot pin.
3. circuit-breaker according to claim 1, is characterized in that,
The bend of one is set on described chain shot, and the part that described lock part contacts is this bend.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2010-009127 | 2010-01-19 | ||
| JP2010009127A JP5333253B2 (en) | 2010-01-19 | 2010-01-19 | Circuit breaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102129941A CN102129941A (en) | 2011-07-20 |
| CN102129941B true CN102129941B (en) | 2014-05-07 |
Family
ID=44267984
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010268569.8A Active CN102129941B (en) | 2010-01-19 | 2010-08-30 | Circuit breaker |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP5333253B2 (en) |
| KR (1) | KR101093850B1 (en) |
| CN (1) | CN102129941B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102436984B (en) * | 2011-12-26 | 2014-01-15 | 法泰电器（江苏）股份有限公司 | Breaker rapid disjunction device |
| JP6395676B2 (en) * | 2015-07-31 | 2018-09-26 | 三菱電機株式会社 | Circuit breaker |
| US11348753B2 (en) * | 2017-12-01 | 2022-05-31 | Mitsubishi Electric Corporation | Contactor having fixed and movable iron cores and a movable contact |
| GB2602968A (en) * | 2021-01-20 | 2022-07-27 | Eaton Intelligent Power Ltd | Moving contact oscillating damper |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53114078A (en) * | 1977-03-15 | 1978-10-05 | Matsushita Electric Works Ltd | Wiring breaker |
| JPH0824021B2 (en) * | 1988-06-08 | 1996-03-06 | 三菱電機株式会社 | Circuit breaker switching mechanism |
| JPH04190521A (en) * | 1990-11-26 | 1992-07-08 | Hitachi Ltd | Breaker for wiring |
| JP3503396B2 (en) * | 1997-03-06 | 2004-03-02 | 三菱電機株式会社 | Circuit breaker |
| KR100831709B1 (en) | 2007-02-27 | 2008-05-22 | 동아전기공업 주식회사 | Trip device for circuit breaker |
-
2010
- 2010-01-19 JP JP2010009127A patent/JP5333253B2/en active Active
- 2010-08-30 CN CN201010268569.8A patent/CN102129941B/en active Active
- 2010-11-26 KR KR1020100118545A patent/KR101093850B1/en active IP Right Grant
Non-Patent Citations (2)
| Title |
|---|
| JP平10-255639A 1998.09.25 |
| JP平1-311529A 1989.12.15 |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20110085857A (en) | 2011-07-27 |
| JP2011150812A (en) | 2011-08-04 |
| CN102129941A (en) | 2011-07-20 |
| KR101093850B1 (en) | 2011-12-13 |
| JP5333253B2 (en) | 2013-11-06 |
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