CN102262983B - Rotating contact terminal component - Google Patents
Rotating contact terminal component Download PDFInfo
- Publication number
- CN102262983B CN102262983B CN201010185726.9A CN201010185726A CN102262983B CN 102262983 B CN102262983 B CN 102262983B CN 201010185726 A CN201010185726 A CN 201010185726A CN 102262983 B CN102262983 B CN 102262983B
- Authority
- CN
- China
- Prior art keywords
- junction
- contact
- guiding piece
- arm
- linking arm
- Prior art date
- 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.)
- Expired - Fee Related
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
- H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
- H01H1/20—Bridging contacts
- H01H1/2041—Rotating bridge
- H01H1/205—Details concerning the elastic mounting of the rotating bridge in the rotor
-
- 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
- H01H73/045—Bridging contacts
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H77/00—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting
- H01H77/02—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism
- H01H77/10—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism with electrodynamic opening
- H01H77/102—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism with electrodynamic opening characterised by special mounting of contact arm, allowing blow-off movement
- H01H77/104—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism with electrodynamic opening characterised by special mounting of contact arm, allowing blow-off movement with a stable blow-off position
Abstract
The invention relates to a rotating contact terminal component which comprises a rotor, a contact arm, a shaft, a spring, a connecting arm and a guiding mechanism, wherein the contact arm has a hole; the shaft penetrates through the hole, so as to rotatably connect the contact arm with the rotor; one end of the connecting arm is pivoted with the rotor while the other end is connected to one end of the spring; the guiding mechanism is used for guiding the contact arm to switch between a closing position and an opening position; and under the action of an elastic force of the spring, a torque generated by the contact arm is used for closing a moving contact of the contact arm and a fixed contact of an electric conductor at the closing position and is used for opening the moving contact of the contact arm and the fixed contact of the electric conductor at the opening position. The rotating contact terminal component can be quickly opened at overflowing state, can be reclosed after being opened at instant overflowing state and can be reliably locked at the opening position at strong overflowing state.
Description
Technical field
The present invention relates to a kind of rotation contact assembly, rotate contact assembly more specifically to a kind of current limliting for circuit breaker.In addition, the invention still further relates to a kind of circuit breaker adopting described current limliting to rotate contact assembly.
Background technology
Circuit breaker is the critical component of distribution system.Distribution system shown in Fig. 1 comprises at least one and the load L corresponding with downstream circuit breaker DSCB in a power supply S, upstream circuit breaker USCB, 1 a to n downstream circuit breaker DSCB.When there is improper electric current (such as overcurrent, short circuit) in circuit, the electric current flowing to load L from power supply S can automatically cut off by these circuit breakers, to protect circuit and the parts of load L side.These circuit breakers have one usually for detecting trip unit and the operating mechanism interlocked with described trip unit of described improper electric current.According to the needs of corresponding load L, downstream circuit breaker DSCB disconnects under being arranged in certain overcurrent condition, such as, when exceeding the current class allowing to pass through.According to the demand of electric power system, upstream circuit breaker USCB disconnects under being also provided in certain overcurrent condition, usually the grade of this overcurrent is higher than the grade of downstream circuit breaker overcurrent, and thus when downstream circuit breaker DSCB disconnects, upstream circuit breaker USCB may not disconnect.
Regular circuit breakers has following defect:
First, the moving contact of regular circuit breakers is fast not with being separated of fixed contact.
In an overcurrent condition, after trip unit detects improper electric current, just carry out unlocking motion to discharge described operating mechanism, then moving contact is separated from fixed contact by the athletic meeting of described operating mechanism, to cut off the improper electric current in described circuit.Due to described trip unit unlocking motion and to make action life period from the described operating mechanism of release to moving contact and postpone, therefore the disconnection action of the described moving contact that undertaken by operating mechanism and fixed contact is inevitably slow.When serious overcurrent, this disconnect mode cannot realize the object of protective circuit, load and circuit breaker self.
Secondly, the moving contact of separation and fixed contact again may close before circuit breaker operation mechanism is released.
In order to avoid front a kind of defect, there is current limliting contact assembly.For in the current limliting contact assembly of circuit breaker, the electrodynamic repulsion force that produces between moving contact and fixed contact can be utilized to be applied to closed moment in contact arm to overcome touch spring, thus contact arm promptly to be washed open be separated moving contact and fixed contact.The action washing action and described operating mechanism open due to this has nothing to do, therefore opening of contact arm is faster.But, while washing contact arm open, can produce electric arc between moving contact and fixed contact, the actual current in circuit is also promptly restricted to level low compared with prospective current by these electric arcs, and thus electrodynamic repulsion force can reduce along with described opening of contact arm.In addition, owing to washing action open usually early than the slow action of operating mechanism, so operating mechanism still remains on make position when contact arm is washed open.Therefore, the contact arm washed open may fall after rise under the effect of the closed moment of touch spring, and moving contact and fixed contact are closed again.Again closed contact arm makes improper electric current again pass through, thus damages load, and discharges large energy damage circuit breaker itself.Therefore, must take measures to current limliting contact arm assembly, prevent the contact arm washed open from again closing.
US Patent No. 7005594B2 discloses a kind of current limliting and rotates contact assembly, and it adopts a kind of cam face of special shape.The roller be connected with spring when overcurrent occurs will fall in a groove along described surface, thus prevent the fixed contact washed open and moving contact from again closing.Its defect is, cam face is complicated, realize good current limiting performance and accurately must design, manufacture, which greatly increases cost.In addition, long-term use by the surface of wear cam, thus significantly reduces the reliability of contact assembly work.
Current limliting disclosed in US Patent No. 6084489A is rotated contact assembly and then be have employed outside assembly one independently the retaining mechanism fixed contact that prevents from washing open and moving contact close again.Its defect is, locking member and corresponding bias spring will independently be installed on outside contact assembly, realize it and must accurately locate with coordinating of contact arm and manufacture.In addition, particular design corresponding to a kind of and described locking member must be used to unlock contact arm, each of which increases its complexity and cost, reduce compactness.
Again, selective protection system and impact load require that contact assembly has the ability of high tolerance temporary impact electric current.
When as upstream circuit breaker USCB or for impact load, there is the demand being different from downstream circuit breaker DSCB.When short circuit problem appears in a part for distribution system, if upstream circuit breaker does not possess enough transient current tolerances, it may disconnect together with the downstream circuit breaker DSCB of faulty component or prior to the downstream circuit breaker DSCB of faulty component.This will cause whole distribution system to be paralysed, but not only be disconnected by faulty component.In addition, electric power system also can comprise that some exist the load of impulse current as motor and transformer etc. usually.If the contact assembly for the protection of the circuit breaker of this system does not have enough transient current tolerances, described contact assembly is opened under the effect of described temporary impact electric current, thus stops electric current to arrive these loads L be connected with described circuit breaker.
Summary of the invention
The object of the invention is to, overcome the above-mentioned defect existed in prior art, circuit breaker can be opened rapidly in an overcurrent condition, can again close after opening under instantaneous overcurrent situation, and be reliably locked under strong overcurrent condition and wash position open.
Described object is rotated contact assembly by one and is realized.This rotation contact assembly for circuit breaker comprises: a rotor; A contact arm, it has hole; An axle, described contact arm is connected with described rotor through described hole by rotationally; A spring.Described rotation contact assembly also comprises: a linking arm, and its provided at one ground connects described rotor, and its other end connects one end of described spring;
A guide, it guides described contact arm in make position and the switching washed open between position; The spring force of wherein said spring makes the moving contact of described contact arm and the fixed contact of electric conductor close the moment that described contact arm produces in make position, and the fixed contact of the moving contact of described contact arm and described electric conductor is opened washing position open.
According to one aspect of the present invention, described guide comprises the guide rail of a guiding piece and and described guides fitting.
According to another aspect of the present invention, described guiding piece is positioned in described contact arm, and described guide rail is positioned on described linking arm.
According to another aspect of the invention, described rotor comprises the first rotor part and the second rotor portion; In the space of described contact arm between described the first rotor part and described second rotor portion; Described linking arm comprises the first linking arm between described contact arm and described the first rotor part and the second linking arm; The provided at one ground of described first linking arm connects described the first rotor part in the first junction, and its other end is connected to one end of described spring; The provided at one ground of described second linking arm connects described the first rotor part in the second junction, and its other end is connected to the other end of described spring; Described guiding piece comprises the first guiding piece and the second guiding piece that are positioned at both sides, described hole, the guide rail on the first linking arm described in described first guides fitting, and the guide rail on the second linking arm described in described second guides fitting.
According to another aspect of the present invention, described rotation contact assembly also has another spring; Described linking arm also comprises the 3rd linking arm between described contact arm and described second rotor portion and the 4th linking arm: the provided at one ground of the 3rd linking arm is connected described second rotor portion in the 3rd junction, and its other end be connected to described in one end of another spring; The provided at one ground of the 4th linking arm connects described second rotor portion in the 4th junction, and its other end is connected to the other end of another spring described; Described guiding piece also comprises the 3rd guiding piece and the 4th guiding piece that are positioned at both sides, described hole, the guide rail on the 3rd linking arm described in described 3rd guides fitting, and the guide rail on the 4th linking arm described in described 4th guides fitting; Described first linking arm and described 3rd linking arm, and described second linking arm and described 4th linking arm are arranged symmetrically with about described contact arm respectively.
According to another aspect of the present invention, described rotor comprises the first rotor part and the second rotor portion; In the space of described contact arm between described the first rotor part and described second rotor portion; Described spring comprises the first spring and the second spring; Described linking arm comprises the first linking arm between described contact arm and described the first rotor part, and between described contact arm and described second rotor portion the 3rd linking arm; The provided at one ground of described first linking arm connects described the first rotor part in the first junction, and its other end is connected to one end of described first spring; The provided at one ground of described 3rd linking arm connects described second rotor portion in the 3rd junction, and its other end is connected to one end of described second spring; The other end of described first spring connects described the first rotor part, and the other end of described second spring connects described second rotor portion; Described guiding piece comprises the first guiding piece and the 3rd guiding piece, described first guiding piece and described 3rd guiding piece lay respectively at the side in described hole, and be arranged symmetrically with about described contact arm, guide rail on first linking arm described in described first guides fitting, and the guide rail on the 3rd linking arm described in described 3rd guides fitting.
According to another aspect of the present invention, described first junction and described second junction lay respectively at the both sides of described axle, and the line of described first junction and described second junction is through the axis of described axle; Described first guiding piece and described second guiding piece and described hole conllinear.
According to another aspect of the present invention, described first junction and described second junction lay respectively at the both sides of described axle, and the line of described first junction and described second junction is through the axis of described axle; Described 3rd junction and described 4th junction lay respectively at the both sides of described axle, and the line of described 3rd junction and described 4th junction is through the axis of described axle; Described first guiding piece and described second guiding piece and described hole conllinear, and described 3rd guiding piece and described 4th guiding piece and described hole conllinear; The described line of described first junction and described second junction is parallel to the described line of described 3rd junction and described 4th junction, and the line of described first guiding piece and described second guiding piece is parallel to the line of described 3rd guiding piece and described 4th guiding piece.
According to another aspect of the present invention, described first junction is equal to the distance of described axis with described second junction.
According to another aspect of the present invention, described first junction, described second junction, described 3rd junction and described 4th junction are all equal to the distance of described axis.
According to another aspect of the present invention, the distance between described first junction and described second junction is less than the distance between described first guiding piece and described second guiding piece.
According to another aspect of the present invention, the distance between described first junction and described second junction is less than the distance of described first guiding piece and described second guiding piece; Described first junction and described second junction state the distance that distance equals described 3rd junction and described 4th junction, and the described distance of described first guiding piece and described second guiding piece equals the distance of described 3rd guiding piece and described 4th guiding piece.
According to another aspect of the present invention, described first junction, described second junction are all realized by the cooperation in a pin and a hole.
According to another aspect of the present invention, described first junction, described second junction, described 3rd junction and described 4th junction are all realized by the cooperation in a pin and a hole.
According to another aspect of the present invention, described contact arm is about described hole Central Symmetry.
According to another aspect of the present invention, the moving contact of one end of described contact arm can engage the fixed contact of in described electric conductor, and the other end of described contact arm is connected to another in described electric conductor by a cable.
According to another aspect of the present invention, described guiding piece is a pin, and described guide rail is a groove coordinated with described pin.
Described object is also realized by a kind of circuit breaker, and described circuit breaker has above-mentioned rotation contact assembly.
The invention has the advantages that, even if when contact is subject to part wears and erosion, also can guarantee the pressure between make position moving contact and fixed contact, to realize good electrical contact, guarantee the rising of contact temperature under normal current to be limited in specific scope simultaneously.In an overcurrent condition, such as, when exceeding lsafety level, promptly can open before operating mechanism action under the effect of the electrodynamic repulsion force that described contact assembly produces between moving contact and fixed contact.Cross flow horizontal low, described contact assembly can be opened and again close, and this makes described contact assembly have splendid transient current tolerance.Thus, downstream circuit breaker DSCB has an opportunity to make a response to fault, minimizes to make the scope of power-off.Meanwhile, described contact assembly can bear the temporary impact electric current of such as motor and transformer.The contact arm washed open reliably can be locked in and wash position open by described contact assembly before operating mechanism is released.The reset operation of described contact assembly is easy.When contact arm be locked in wash position open time, rotor is still still in make position.Described contact arm and rotor reset by the operating mechanism of follow-up release by described contact assembly.After this, contact assembly just can have been reworked.Described contact assembly also achieves compact layout, and is applicable to single-breakpoint circuit breaker and dual-interruption point breaker simultaneously.
Accompanying drawing explanation
In conjunction with the following drawings, the features and advantages of the present invention will become clearly.Wherein:
Fig. 1 shows the schematic diagram of distribution system;
Fig. 2 shows the stereogram of the rotation contact assembly 100 for dual-interruption point breaker according to one embodiment of the present invention;
Fig. 3 shows the rotation contact assembly 100 of Fig. 2 and the exploded view of electric conductor 221 and 222;
Fig. 4 shows the stereogram of the contact arm 110 of rotating contact assembly 100;
Fig. 5 shows the stereogram of the linking arm rotating contact assembly 100;
Fig. 6 shows the stereogram of the rotor 120 be made up of the first rotor part 121 and the second rotor portion 122 rotating contact assembly 100;
Fig. 7 shows the stereogram of the rotation contact assembly 100 of sections fit;
Fig. 8 show schematically show the different operating state of rotating contact assembly 100;
Fig. 9 shows the state (A) in the Fig. 8 after spring removed and state (D);
Figure 10 shows the side view of the rotation contact assembly 300 for single-breakpoint circuit breaker according to one embodiment of the present invention.
Embodiment
Fig. 2 shows the rotation contact assembly 100 according to one embodiment of the present invention.Rotate contact assembly 100 to be usually arranged in the circuit breaker as the upstream circuit breaker USCB in Fig. 1.In order to more clearly show, Fig. 2 eliminates other parts of circuit breaker.Rotate contact assembly 100 and comprise contact arm 110 and rotor 120, wherein moving contact 111 and moving contact 112 lay respectively at the two ends of contact arm 110.First electric conductor 221 (such as power strip) and the second electric conductor 222 (such as load bar) lay respectively at the both sides of rotating contact assembly 100, and corresponding with the two ends of contact arm 110 respectively.When rotating contact assembly 100 and being in the make position shown by Fig. 2, fixed contact 223 and moving contact 111 engage, and fixed contact 224 and moving contact 112 engage, and so just between the first electric conductor 221 and the second electric conductor 222, establish electrical connection.Meanwhile, arc chute 211 and 212 lays respectively at and rotates the both sides of contact assembly 100, and arranges near fixed contact 223 and fixed contact 224, carries out arc extinguishing in order in the process opened in contact arm 110.Rotate contact assembly 100 is connected to circuit breaker main body by boss 153.Although the rotation contact assembly 100 shown in figure only has a contact arm 110, it will be appreciated by those skilled in the art that and independent rotation contact assembly 100 can be all set for often pair of electrode when being used for multipole circuit breaker.Hole 128 is arranged on rotor 120, and is connected with the operating mechanism (not shown) of circuit breaker, thus manually or by trip unit trigger mechanism contact arm 110 to be opened or closed.
Fig. 3 shows the rotation contact assembly 100 after decomposition, and has the first electric conductor 221 of fixed contact 223 and have the second electric conductor 222 of fixed contact 224.Rotate contact assembly 100 can rotate around axle 101 in the course of the work.From the side, the contact arm 110 of serpentine is about hole 115 Central Symmetry of its central authorities.Contact arm 110 has two sides, wherein the first side is symmetrically furnished with a directing pin 113 and a directing pin 114.As shown in Figure 4, second side of contact arm 110 is also furnished with symmetrically identical two directing pin 116 and 117, these four directing pin insert the rotation guiding described four linking arms in the guiding groove of four linking arms 131,132,133,134 rotating contact assembly 100 after assembling respectively.It will be understood by those skilled in the art that above-mentioned directing pin also can be arranged to non-axis symmetry and non-centrosymmetrical form.Rotor 120 is made up of the first rotor part 121 and the second rotor portion 122, and the central authorities of described two rotor portions all have a hole, and axle 103 is through described hole and hole 115, and axle 101 is similarly the axis of axle 103.After assembling, the first rotor part 121 and the second rotor portion 122 are called inner side towards the side of contact arm.In the inner side of the second rotor portion 122, the hole of closing thereon is furnished with pin 123 and pin 124 symmetrically.Although not shown in Fig. 3, the inner side of the first rotor part 121 is also furnished with two identical pins.There is linking arm 131 and linking arm 132 between contact arm 110 and the first rotor part 121, and between contact arm 110 and the second rotor portion 122, there is linking arm 133 and linking arm 134.In the process that contact arm 110 is moved, linking arm 133 and 134 rotates around pin 123 and 124 respectively, and described two pins of linking arm 131 and 132 respectively inside the first rotor part 121 rotate.One end of linking arm 131 and 132 is connected respectively to spring 141, and its other end is connected respectively to the pin of the inner side of the first rotor part 121.One end of linking arm 133 is connected to spring 142, and its other end is connected to pin 123.One end of linking arm 134 is connected to spring 142, and its other end is connected to pin 124.In addition, rotor 120 also can have cover plate 151 and cover plate 152, two steady pins 102 and be each passed through hole on described cover plate and described rotor portion, thus is assembled up by whole rotation contact assembly 100.Spring force on spring is delivered in contact arm by directing pin by linking arm, thus forms rotating torque in contact arm.
Fig. 5 shows the stereogram of linking arm.Described four linking arms 131,132,133 and 134 can have identical structure, wherein the abutting end 135 of each linking arm is connected with one end of spring 141 or 142, the pin inside the first rotor part 121 and the second rotor portion 122 is installed in the hole 137 of the linking arm other end, and linking arm can be rotated around described pin.Also can slide in groove 136 in directing pin 113,114,116 and 117 insertion groove 136.Although the cross section of the groove 136 shown in figure is U-shaped, it will be appreciated by those skilled in the art that groove 136 also can have other suitable cross sectional shape.
Fig. 6 and Fig. 7 shows rotor 120, wherein between drive surfaces 125, stop surface 126 and inner surface 127, there is space.Linking arm can slide on the inner surface 127 of the first rotor part 121 and the second rotor portion 122.Due to Automatic-drawing and the contraction of spring 141 and spring 142, and the automatic motion of pin 113,114,116 and 117 in groove 136, connection between described contact arm 110 and rotor 120 can compensate part tolerance and contact abrasion, thus provide optimized contact pressure, and under achieving over-current state, contact arm 110 is washing the positive lock of position open.
Fig. 8 shows the same rotation contact assembly 100 being in different operating state, although wherein only mark parts in state (B), the corresponding component in other each figure is identical.Fig. 9 rotates the correlation between the different parts of contact assembly 100 under more clearly illustrating state (A) and state (D) by removal spring.
State (A) shows contact arm 110 in the close position.Because the spring 141 and 142 stretched always attempts to be returned to the length of its free state, so the spring force produced impels the moving contact 111 at contact arm 110 two ends and moving contact 112 to be pressed in respectively on fixed contact 223 and fixed contact 224.
When changing to state (A) from state (E), after moving contact 111 and moving contact 112 engage fixed contact 223 and fixed contact 224 respectively, rotor 120 is continued rotation angle [alpha] by operating mechanism (not shown), until rotate contact assembly 100 to arrive make position.Now the surface 118 of contact arm 110 and drive surfaces 125 are separated, and pin 123 and 124 departs from the position of spring force, thus make spring force produce closed moment.This moment is delivered to contact arm 110 by pin 123 and 124, linking arm 133 and 134 and directing pin 116 and 117 by spring, thus is pressed onto respectively on fixed contact 223 and 224 by moving contact 111 and 112.This is called excess of stroke operation (over-travel).
By arranging moving contact 111 and 112, fixed contact 223 and 224, spring and linking arm symmetrically, achieve fixed contact 223 and moving contact 111 and the pressure between fixed contact 224 and moving contact 112 substantially equal.Even if moving contact and fixed contact are corroded by arc portions or wear and tear because of switching manipulation repeatedly, the described connection between contact arm 110 and rotor 120 also can auto-compensation they, thus guarantee enough contact pressures.
State (B) shows the state occurring overcurrent in circuit.Serve as when flowing through contact assembly 100, between moving contact and fixed contact and contact arm 110 and will electrodynamic repulsion force be produced between power strip and load bar.If overcurrent reaches certain level, such as take-off level (Popping level), electrodynamic repulsion force, by overcoming the closed moment of spring generation, impels contact arm 110 promptly to wash open, thus moving contact is separated with fixed contact, and produce electric arc between fixed contact and moving contact.
Wash the circuit breaker operation mechanism slowly opening action of action usually prior to being triggered by trip unit open, thus rotor 120 still keeps static.Because electric arc makes the actual current in circuit be reduced to level low compared with prospective current, thus the electrodynamic repulsion force in contact arm opening procedure is reduced, so contact arm 110 again can make moving contact and fixed contact engage under the effect of the closed moment of spring.Electrodynamic repulsion force is contrary with the direction of spring to the moment of contact arm 110 to the moment of contact arm 110, and the antagonism of the two causes contact arm 110 alternately to washing position and make position rotation open.In this case, directing pin 116 and directing pin 117 are in the not homonymy of the line of pin 123 and pin 124 all the time, both can not with this line coincident more can not cross this line and arrive opposite side.Like this, spring is always contact arm 110 and provides closed moment.
This makes to rotate contact assembly 100 and has good immediate current tolerance.When for upstream circuit breaker USCB, upstream circuit breaker USCB can open when low flow horizontal excessively and again close, thus allows downstream circuit breaker to have an opportunity to react to fault, and then reduces the scope of power-off to greatest extent.When the load having a moment impact electric current with motor or transformer etc. uses jointly, can avoid circuitry cuts when moment impact electric current.
State (C) shows from make position to the centre position washing position open.When there is more serious overcurrent, electrodynamic repulsion force can impel contact arm to continue to open, and makes the line conllinear of directing pin 116 and 117 and pin 123 and 124.When being positioned at centre position, spring is zero to the moment of contact arm 110, contact arm 110 only has the moment that electrodynamic repulsion force produces.Now, the position of spring force simultaneously through the first linking arm 131 connects the first junction of the first rotor part 121, the second linking arm 132 connects the first rotor part 121 the second junction, the 3rd linking arm 133 connects the 4th junction that the 3rd junction of the second rotor portion 122 and the 4th linking arm 134 connect the second rotor portion 122.Between make position and centre position, the moment that spring produces impels contact arm 110 to close, and in centre position with wash open between position, the moment that spring produces impels contact arm 110 to open.
State (D) shows the contact arm 110 being in and washing position open.Behind centre position, the contact arm moment that spring produces by closing force torque conversion for opening moment, will be impelled contact arm 110 fast away from fixed contact 223 and fixed contact 224, and cannot automatically restore to make position.Stop surface 126 is at the rotational angle washing position limitation contact arm 110 open.
Now, directing pin 116 and 117 has crossed the line of pin 123 and pin 124, and is in the not homonymy of the line of pin 123 and 124.Accordingly, spring is contrary with the direction in state (A) and state (B) to the direction of the moment of contact arm 110, namely identical with the direction of electrodynamic repulsion force, thus force contact arm 110 to be locked in reliably to wash position open, avoid again closing of moving contact and fixed contact, reset except by circuit breaker operation mechanism.
State (E) shows the contact arm 110 being in reset mode.Carry out rotary rotor 120 by the operating mechanism be connected with hole 128, pin 123 rotates together with rotor 120 with 124, makes pin 123 and 124 cross the line of directing pin 116 and 117.This makes the contact arm moment produced from spring oppositely namely again become closed moment, thus contact arm 110 is unlocked.In the process resetted, surface 118 and the drive surfaces 125 of contact arm 110 contact, thus contact assembly 100 is reset to open position.
Figure 10 shows the rotation contact assembly 300 for single-breakpoint circuit breaker according to another embodiment of the present invention.Rotate contact assembly 300 to be with the difference of rotating contact assembly 100, rotate the contact arm 310 of contact assembly 300 and rotor 320 to be only and to rotate the contact arm 110 of contact assembly 100 and the half of rotor 120, and contact arm 310 is not had a side of moving contact and is electrically connected with electric conductor 222 by cable 301.Rotate contact assembly 300 to be also with the difference of rotating contact assembly 100, the one end of the spring 340 be not connected with linking arm 330 is connected on rotor 320.
Although more than illustrate embodiments of the present invention, described execution mode is not intended to show all possible form of the present invention.In addition, the content in this specification is descriptive, and nonrestrictive.Those skilled in the art can make variations and modifications to the content of this specification, and do not depart from the scope of purport of the present invention and claim.
Claims (15)
1. one kind for the rotation contact assembly (100) of circuit breaker, comprising:
A rotor (120), it comprises the first rotor part (121) and the second rotor portion (122);
A contact arm (110), it has hole (115) and is arranged in the space between described the first rotor part (121) and described second rotor portion (122);
An axle (103), described contact arm (110) is connected with described rotor (120) through described hole (115) by rotationally;
A spring (141,142);
A linking arm (131,132,133,134), its provided at one ground connects described rotor (120), and its other end connects one end of described spring (141,142);
Described linking arm (131,132,133,134) comprises and is positioned at the first linking arm (131) between described contact arm (110) and described the first rotor part (121) and the second linking arm (132);
The provided at one ground of described first linking arm (131) connects described the first rotor part (121) in the first junction, and its other end is connected to one end of described spring (141);
The provided at one ground of described second linking arm (132) connects described the first rotor part (121) in the second junction, and its other end is connected to the other end of described spring (141);
A guide, it guides described contact arm (110) in make position and the switching washed open between position, and comprise a guiding piece (113,114,116,117) and a guide rail coordinated with described guiding piece (113,114,116,117), wherein said guiding piece (113,114,116,117) is positioned in described contact arm (110), and described guide rail is positioned on described linking arm (131,132,133,134);
Described guiding piece (113,114,116,117) comprises the first guiding piece (113) and the second guiding piece (114) that lay respectively at described hole (115) both sides, described first guiding piece (113) coordinates the guide rail on described first linking arm (131), and described second guiding piece (114) coordinates the guide rail on described second linking arm (132);
The spring force of wherein said spring (141,142) makes the moving contact (111,112) of described contact arm (110) and the fixed contact (223,224) of electric conductor (221,222) close the moment that described contact arm (110) produces in make position, and the fixed contact (223,224) of the moving contact of described contact arm (110) (111,112) and described electric conductor (221,222) is opened washing position open.
2. rotate contact assembly (100) as claimed in claim 1, it is characterized in that:
Described rotation contact assembly (100) also has another spring (142);
Described linking arm also comprises and is positioned at the 3rd linking arm (133) between described contact arm (110) and described second rotor portion (122) and the 4th linking arm (134):
The provided at one ground of described 3rd linking arm (133) connects described second rotor portion (122) in the 3rd junction (123), and its other end is connected to one end of described another spring (142);
The provided at one ground of described 4th linking arm (134) connects described second rotor portion (122) in the 4th junction (124), and its other end is connected to the other end of described another spring (142);
Described guiding piece also comprises the 3rd guiding piece and the 4th guiding piece that lay respectively at described hole (115) both sides, guide rail on 3rd linking arm (133) described in described 3rd guides fitting, and the guide rail on the 4th linking arm (134) described in described 4th guides fitting;
Described first linking arm (131) and described 3rd linking arm (133), and described second linking arm (132) and described 4th linking arm (134) are arranged symmetrically with about described contact arm (110) respectively.
3. rotate contact assembly (300) as claimed in claim 1, it is characterized in that:
Described rotor (320) comprises the first rotor part and the second rotor portion;
In the space of described contact arm (310) between described the first rotor part and described second rotor portion;
Described linking arm (330) is positioned between described contact arm (310) and described the first rotor part, and its provided at one ground connects described the first rotor part, and its other end is connected to one end of described spring (340);
The other end of described spring (340) connects described the first rotor part.
4. the rotation contact assembly (100) as described in any one claim in claim 1 and 2, is characterized in that:
Described first junction and described second junction lay respectively at the both sides of described axle (103), and the line of described first junction and described second junction is through the axis (101) of described axle (103);
Described first guiding piece (113) and described second guiding piece (114) and described hole (115) conllinear.
5. rotate contact assembly (100) as claimed in claim 2, it is characterized in that:
Described first junction and described second junction lay respectively at the both sides of described axle (103), and the line of described first junction and described second junction is through the axis (101) of described axle (103);
Described 3rd junction (123) and described 4th junction (124) lay respectively at the both sides of described axle (103), and the axis (101) of line through described axle (103) of described 3rd junction (123) and described 4th junction (124);
Described first guiding piece (113) and described second guiding piece (114) and described hole (115) conllinear, and described 3rd guiding piece (116) and described 4th guiding piece (117) and described hole (115) conllinear;
The described line of described first junction and described second junction is parallel to the described line of described 3rd junction (123) and described 4th junction (124), and the line of described first guiding piece (113) and described second guiding piece (114) is parallel to the line of described 3rd guiding piece (116) and described 4th guiding piece (117).
6. rotate contact assembly (100) as claimed in claim 4, it is characterized in that:
Described first junction is equal to the distance of described axis (101) with described second junction.
7. rotate contact assembly (100) as claimed in claim 2, it is characterized in that:
Described first junction, described second junction, described 3rd junction (123) and described 4th junction (124) are all equal to the distance of the axis (101) of described axle (103).
8. the rotation contact assembly (100) as described in any one claim in claim 1 and 2, is characterized in that:
Distance between described first junction and described second junction is less than the distance between described first guiding piece (113) and described second guiding piece (114).
9. rotate contact assembly (100) as claimed in claim 2, it is characterized in that:
Distance between described first junction and described second junction is less than the distance between described first guiding piece (113) and described second guiding piece (114);
The described distance of described first junction and described second junction equals the distance of described 3rd junction (123) and described 4th junction (124), and the described distance of described first guiding piece (113) and described second guiding piece (114) equals the distance of described 3rd guiding piece (116) and described 4th guiding piece (117).
10. the rotation contact assembly (100) as described in any one claim in claim 1 and 2, is characterized in that:
Described first junction, described second junction are all realized by the cooperation in a pin and a hole.
11. rotate contact assembly (100) as claimed in claim 2, it is characterized in that:
Described first junction, described second junction, described 3rd junction (123) and described 4th junction (124) are all realized by the cooperation in a pin and a hole.
12. rotation contact assemblies (100) as described in any one claim in claim 1 and 2, is characterized in that:
Described contact arm (110) is about described hole (115) Central Symmetry.
13. rotate contact assembly (300) as claimed in claim 3, it is characterized in that:
The moving contact (311) of one end of described contact arm (310) can engage the fixed contact (223) of (221) in described electric conductor, and the other end of described contact arm (310) is connected to by a cable (301) another (222) in described electric conductor.
14. rotation contact assemblies (100) as described in any one claim in claims 1 to 3, is characterized in that:
Described guiding piece (113,114,116,117) is a pin, and described guide rail is a groove coordinated with described pin.
15. 1 kinds of circuit breakers, is characterized in that: described circuit breaker has and rotates contact assembly (100) as claimed in claim 1.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010185726.9A CN102262983B (en) | 2010-05-28 | 2010-05-28 | Rotating contact terminal component |
| DE201110075655 DE102011075655A1 (en) | 2010-05-28 | 2011-05-11 | Rotating contact subassembly for circular breaker, has shaft passing through hole of contact arm, and spring whose spring force opens movable contact of contact arm and static contact of electric conductor at breaking position of switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010185726.9A CN102262983B (en) | 2010-05-28 | 2010-05-28 | Rotating contact terminal component |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102262983A CN102262983A (en) | 2011-11-30 |
| CN102262983B true CN102262983B (en) | 2014-12-31 |
Family
ID=45009581
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010185726.9A Expired - Fee Related CN102262983B (en) | 2010-05-28 | 2010-05-28 | Rotating contact terminal component |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN102262983B (en) |
| DE (1) | DE102011075655A1 (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102011081736A1 (en) | 2011-08-29 | 2013-02-28 | Siemens Aktiengesellschaft | Electric switch |
| EP2831897B1 (en) | 2012-03-28 | 2017-03-01 | Larsen & Toubro Limited | An improved double break contact system for moulded case circuit breakers |
| CN104319205A (en) * | 2014-10-31 | 2015-01-28 | 博耳(无锡)电力成套有限公司 | Rotation type double-breakpoint contact structure of circuit breaker |
| CN105428098B (en) * | 2015-12-10 | 2018-12-11 | 二一三电器(上海)有限公司 | Double breaking points trigger device |
| US9842708B1 (en) * | 2016-06-03 | 2017-12-12 | General Electric Company | Circuit breaker latch mechanism integrated into the rotor assembly |
| CN106601506B (en) * | 2016-12-29 | 2018-07-06 | 施耐德万高（天津）电气设备有限公司 | The contact system of change-over switch |
| EP3483319B1 (en) | 2017-11-09 | 2021-12-22 | Groz-Beckert KG | Textile tool with indicator film |
| CN107749360A (en) * | 2017-12-06 | 2018-03-02 | 法泰电器（江苏）股份有限公司 | A kind of multipole linkage rotation formula double break contact self-locking device |
| CN109036987B (en) * | 2018-10-01 | 2024-01-30 | 无锡新宏泰电器科技股份有限公司 | Switching-on/off auxiliary mechanism of N pole unit of double-breakpoint circuit breaker and double-breakpoint circuit breaker |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101009175A (en) * | 2006-01-25 | 2007-08-01 | 大全集团有限公司 | Reed rotating axis locking mechanism |
| CN101320659A (en) * | 2008-07-14 | 2008-12-10 | 上海电器科学研究所（集团）有限公司 | Rotating double-breakpoint structure of plastic case breaker |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6084489A (en) | 1998-09-08 | 2000-07-04 | General Electric Company | Circuit breaker rotary contact assembly locking system |
| US7005594B2 (en) | 2004-04-16 | 2006-02-28 | Ls Industrial Systems Co., Ltd. | Movable contactor assembly of circuit breaker |
| KR100832325B1 (en) * | 2006-12-29 | 2008-05-26 | 엘에스산전 주식회사 | Hybrid molded case circuit breaker |
-
2010
- 2010-05-28 CN CN201010185726.9A patent/CN102262983B/en not_active Expired - Fee Related
-
2011
- 2011-05-11 DE DE201110075655 patent/DE102011075655A1/en not_active Withdrawn
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101009175A (en) * | 2006-01-25 | 2007-08-01 | 大全集团有限公司 | Reed rotating axis locking mechanism |
| CN101320659A (en) * | 2008-07-14 | 2008-12-10 | 上海电器科学研究所（集团）有限公司 | Rotating double-breakpoint structure of plastic case breaker |
Non-Patent Citations (2)
| Title |
|---|
| 第5页第29行-第6页第3行 * |
| 第7页第5-8行. * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102262983A (en) | 2011-11-30 |
| DE102011075655A1 (en) | 2012-02-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102262983B (en) | Rotating contact terminal component | |
| KR100662752B1 (en) | Multi pole circuit breaker | |
| WO2016146083A1 (en) | Miniature circuit breaker capable of rapid breaking | |
| EP2466609B1 (en) | Discharge mechanism for circuit breaker | |
| US10665413B2 (en) | Fusible switch disconnect device for DC electrical power system | |
| ITMI20012325A1 (en) | LOW VOLTAGE SWITCH | |
| WO2017011370A1 (en) | Component for electric power system, and contact assembly and open air arcing elimination method therefor | |
| CN101436492B (en) | Secondary trip system for circuit breaker | |
| CN101562102B (en) | Contact assembly of circuit breaker | |
| CN203026469U (en) | Moving contact component of moulded case circuit breaker | |
| CN207097761U (en) | A kind of operating mechanism of break protective switch | |
| KR100832325B1 (en) | Hybrid molded case circuit breaker | |
| CN101488423B (en) | Selective protection switch and operation mechanism thereof | |
| KR100676968B1 (en) | A contactor assembly for a current limitable circuit breaker | |
| US10176956B2 (en) | Safety tripping device for a frame-type ACB drawer seat | |
| CN104715980A (en) | Magnetic reserved tripping protection mechanism | |
| CA2927229C (en) | Double make double break interrupter module with independent blades | |
| US20090256659A1 (en) | Circuit breaker with improved close and latch performance | |
| AU2019386913B2 (en) | Circuit breaker | |
| CN103681144B (en) | A kind of dual-interruption point breaker | |
| CA2852493A1 (en) | Charging assembly with over rotation control and electrical switching apparatus employing same | |
| CN103021749A (en) | Circuit breaker capable of quickly releasing | |
| CN106128874B (en) | Breaker | |
| CN109659203A (en) | A kind of miniature circuit breaker abnormal protection device and miniature circuit breaker | |
| WO2021142912A1 (en) | Novel mechanical mechanism circuit breaker |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141231 Termination date: 20160528 |