CN103069532A - Circuit breaker - Google Patents
Circuit breaker Download PDFInfo
- Publication number
- CN103069532A CN103069532A CN2011800392002A CN201180039200A CN103069532A CN 103069532 A CN103069532 A CN 103069532A CN 2011800392002 A CN2011800392002 A CN 2011800392002A CN 201180039200 A CN201180039200 A CN 201180039200A CN 103069532 A CN103069532 A CN 103069532A
- Authority
- CN
- China
- Prior art keywords
- movable contact
- contact
- current
- magnetic drive
- electric arc
- 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.)
- Pending
Links
Images
Classifications
-
- 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
- H01H73/18—Means for extinguishing or suppressing arc
-
- 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
- H01H77/107—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 the blow-off force generating means, e.g. current loops
- H01H77/108—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 the blow-off force generating means, e.g. current loops comprising magnetisable elements, e.g. flux concentrator, linear slot motor
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
- H01H9/44—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet
- H01H9/443—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet using permanent magnets
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
- H01H9/44—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet
- H01H9/446—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet using magnetisable elements associated with the contacts
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Breakers (AREA)
- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
A circuit breaker is provided that is capable of suitably shifting an arc that is between contacts towards an arc extinction device, even in a comparatively small current region and without resulting in an increase in the size of equipment. Provided at each pole are: a pair of front/rear fixed contacts (2, 3) that are arranged so as to face each other; a movable contact (4) that bridges the fixed contacts (2, 3); and a pair of front/rear magnetic drive yokes (10) that comprise permanent magnets arranged so as to sandwich the inside face sections of both ends of the movable contact (4). In a closed state, the movable contact (4) closes the current path at each pole by being pressed onto the fixed contacts (2, 3) by means of a contact spring (5). In an open state, the movable contact (4) opens the aforementioned current paths by separating from the fixed contacts (2, 3) due to being pressed by an opening mechanism against the contact spring (5).
Description
Technical field
The present invention relates to a kind of circuit breaker for the distribution protection, and relate more specifically to a kind of circuit breaker with rectilinear motion two contact structures.
Background technology
For example exist as traditional circuit breaker in the technology described in the patent documentation 1.In this technology, U-shaped magnetic body is arranged on movable contact and the fixed contact therefor outside of different current paths.When the large electric current that applies such as short circuit current, this structure can produce between the contact along the electromagnetic repulsive force (Lorentz force) that repels direction, and can move away from fixed contact therefor ground by the operate mobile contact and improve interruption performance.This structure can also make the arc motion that results from after open the contact between the contact to the arc-extinction device at the both end sides place that is arranged on movable contact.
Prior art document patent documentation 1: specially permit communique No. 3859053
Summary of the invention
The technical problem that invention solves
Incidentally, proportional by electromagnetic force and the electric current of the generation of magnetic body.Therefore, in the situation of above-mentioned circuit breaker, the galvanic areas that the less electric current such as rated current is flowed can not produce larger electromagnetic force.
For this reason, little galvanic areas lacks and makes the arc motion that produces when opening in the contact to the power of arc-extinction device.When current interruptions (when the opening operation of contact), the electric arc that between the contact, produces be stuck between the contact than in the situation in the short distance, need to interrupt.The distance of opening between the contact needs to increase, to tackle the high voltage in direct current (DC) circuit that does not have current zero.The maximization that this causes arc-extinction device and has the equipment of circuit breaker.
Therefore, the purpose of this invention is to provide a kind of circuit breaker, even if in the galvanic areas of less, this circuit breaker also can make the electric arc that produces between the contact suitably move to arc-extinction device, and does not cause the maximization of arc-extinction device.
The technological means of dealing with problems
To achieve these goals, first aspect according to circuit breaker of the present invention is such circuit breaker, namely, this circuit breaker comprises a pair of front/rear fixed contact therefor that arranges in extremely at each with facing with each other, form the movable contact of linear motion-type and a pair of front/rear magnetic drive yoke of the bridgeware between the fixed contact therefor, should be arranged to the side surface part on the two ends of movable contact is remained between them to front/rear magnetic drive yoke, wherein, movable contact comes by being pressed in the current feed path that makes each magnetic pole on the fixed contact therefor closed by being touched spring, and by be opened/close mechanism pushes back towards contact spring and opens the current feed path, separating with fixed contact therefor, and the magnetic drive yoke is made of permanent magnet.
According to this structure, when electric current flows to movable contact under closure state, electric current and the magnetic flux interlinkage (Japanese: Lock friendship) of being assembled by the magnetic drive yoke, and drive movable contact in response to stronger electromagnetic repulsive force (Lorentz force), to separate with fixed contact therefor.When the opening operation of contact, between each fixed contact and moving contact, produce electric arc.The electric arc that produces moves to the arc-extinction device that is arranged on movable contact the place ahead and rear by driving with the magnetic flux interlinkage of being strengthened by the magnetic drive yoke, and then this electric arc is eliminated.
Because the magnetic drive yoke is made of permanent magnet, so no matter how levels of current can both obtain constant magnetic flux.Therefore, even in the galvanic areas of less, when the opening operation of contact, each electric arc that produces between the contact can both be driven to move to arc-extinction device effectively.
In second aspect, the magnetic drive yoke is made of the U-shaped permanent magnet, and each the foot that is arranged to the magnetic drive yoke remains on the side surface part of movable contact between the two.
Because the magnetic drive yoke is made of the U-shaped permanent magnet, the foot of U-shaped magnetic drive yoke can remain on the side surface part on the two ends of movable contact between them securely.In addition, the magnetic drive yoke can be arranged on any desired locations.This has increased the degree of freedom that the magnetic drive yoke is set.
In addition, a third aspect of the present invention is such circuit breaker, namely, this circuit breaker has a pair of arc-extinction device and the electric arc change of current plate (Japanese: ア one Network translocation stream plate) that is arranged on movable contact the place ahead and rear, this electric arc change of current plate is with below being arranged on movable contact in the mode of extending above the arc-extinction device and the bottom in movable contact side of electric arc is carried out the change of current, this electric arc results between movable contact and the fixed contact therefor when current interruptions, wherein, electric arc change of current plate has the pair of U-shaped magnetic body to movable contact bending, and the magnetic drive yoke is made of the rectangle permanent magnet, and be arranged to the upper surface that its lower surface is fixed to two foots of U-shaped magnetic body, remain between them with the side surface with movable contact.
Because the structure that the magnetic drive yoke is made of the rectangle permanent magnet is less when permanent magnet is made of the U-shaped permanent magnet than magnetic drive yoke, thereby realize cost.In addition, because the magnetic drive yoke is configured with electric arc change of current plate integratedly, and the part count of circuit breaker can reduce, and simplifies thus the assembling of circuit breaker.
A fourth aspect of the present invention is a kind of like this circuit breaker, namely, this circuit breaker has a pair of arc-extinction device that is arranged on movable contact the place ahead and rear, and electric arc change of current plate, this electric arc change of current plate is arranged in the arc-extinction device top and extends, and the bottom on movable contact of electric arc carried out the change of current, this electric arc results between movable contact and the fixed contact therefor when current interruptions, wherein, electric arc change of current plate has the pair of U-shaped magnet towards movable contact bending, and the magnetic drive yoke is made of the rectangle permanent magnet, and the inner surface of being arranged to the foot by being fixed to the U-shaped magnet remains on the side surface part of movable contact between them.
Because the rectangle permanent magnet is fixed in the electric arc change of current plate inner surface of the foot of crooked U-shaped magnet, the magnetic leakage flux of permanent magnet reduces manyly in the time of can being fixed to foot terminal of U-shaped magnet than permanent magnet.Thus, the arc energy that results between the contact when the opening operation of contact is effectively driven, to move to arc-extinction device.
The invention effect
According to the present invention, because the magnetic drive yoke is made of permanent magnet, even if in the galvanic areas of less, resulting from every current feed path each electric arc on every side when the opening operation of contact all can be effectively driven, to move to arc-extinction device.Therefore, the present invention can provide a kind of miniature circuit breaker, and this miniature circuit breaker is applicable to DC circuit, and helps to reduce to have the size of the equipment of circuit breaker.In addition, the parts of circuit breaker can replace with the parts that are exclusively used in alternating current circuit.Therefore, can provide circuit breaker at a low price by the present invention.
Description of drawings
Fig. 1 illustrates the according to an embodiment of the invention cutaway view of the structure of the current interruptions section of circuit breaker;
Fig. 2 is the exploded perspective view that illustrates according to the structure of the magnetic drive yoke section of the first embodiment;
Fig. 3 is the cutaway view that the structure of the current interruptions section that is in closing of contact position is shown;
Fig. 4 is near the cutaway view that illustrates according to the contact of the first embodiment, and it illustrates the vector of electric current, magnetic flux and electromagnetic repulsive force;
Fig. 5 is near the vertical view that illustrates according to the contact of the first embodiment, and it illustrates the vector of electric current, magnetic flux and electromagnetic repulsive force;
Fig. 6 be illustrate according to the first embodiment be in the contact open position time the direct of travel of electric arc and the view of current interruptions section structure;
Fig. 7 is the cutaway view that illustrates according to the structure of the current interruptions section of the second embodiment;
Fig. 8 is the exploded perspective view that illustrates according to the structure of the magnetic drive yoke section of the second embodiment;
Fig. 9 is near the vertical view that illustrates according to the contact of the second embodiment, and it illustrates the vector of electric current, magnetic flux and electromagnetic repulsive force;
Figure 10 is the exploded perspective view that illustrates according to the structure of the magnetic drive yoke section of the 3rd embodiment;
Figure 11 is near the vertical view that illustrates according to the contact of the 3rd embodiment, and it illustrates the vector of electric current, magnetic flux and electromagnetic repulsive force;
Figure 12 is the view that the magnetic leakage flux of magnetic drive yoke is shown; And
Figure 13 is the view of structure of the current interruptions section of traditional circuit breaker.
Embodiment
Describe according to embodiments of the invention below with reference to accompanying drawings.
(the first embodiment)
(structure)
Fig. 1 illustrates the according to an embodiment of the invention cutaway view of the current interruptions section of circuit breaker.Circuit breaker according to present embodiment is the circuit breaker with rectilinear motion two contact structures.
In diagram, Reference numeral 1 sign current interruptions section.In each phase current feed channels, the U-shaped fixed contact therefor 2,3 that is made of straight angle conductor is arranged on the front and rear of current interruptions section, to face with each other.Fixed contact 2a, 3a are respectively attached to fixed contact therefor 2,3.The movable contact 4 of the reclinate rectangle in two ends has a pair of moving contact 4a and 4b, and this can contact with 3a with fixed contact 2a respectively moving contact.Under the closure state of every current feed path closure, the contact spring 5 of movable contact 4 by being Compress Spring is by being pressed in the effect of playing bridgeware between the fixed contact therefor 2,3 on the fixed contact therefor 2,3, thereby moving contact 4a contacts with 3a with fixed contact 2a respectively with 4b.Under the open mode that the current feed path is opened, as shown in the drawing, movable contact 4 is by being pressed downwards to separate with fixed contact therefor 2,3 towards contact spring 5 by unshowned opened/closed mechanism.
A pair of arc-extinction device 6 is arranged on the place ahead and the rear of movable contact 4.A plurality of grids 7 of arc-extinction device 6 are around the end of movable contact 4.Grid 7 consists of by the U-shaped magnetic sheet, and is supported by a pair of left/right insulative sidewall 8 as shown in vertical view.The electric arc change of current plate 9 of being made by the high-resistance material such as steel plate is arranged on arc-extinction device 6 belows, to extend at front and rear arc-extinction device 6.The effect that electric arc change of current plate 9 plays for the support plate of contact spring 5.
The a pair of front/rear magnetic drive yoke that Reference numeral 10 expressions in the view are made of the U-shaped permanent magnet.Magnetic drive yoke 10 is arranged to make the left foot section of each magnetic drive yoke and right foot part that the side surface part on the end of movable contact 4 is remained between the foot.One in the foot consists of the South Pole, and another consists of the arctic.Each magnetic drive yoke is arranged to obtain the polarity shown in Fig. 5.Left foot section and the right foot part of magnetic drive yoke 10 are coated with insulating lid 11.
Fig. 2 is the exploded perspective view that the structure of the magnetic drive yoke section that is made of electric arc change of current plate 9, magnetic drive yoke 10 and insulating lid 11 is shown.
Insulating lid 11 is by the resin molded U-shaped that forms, and has a pair of left/ right sidewall 11a, 11b, wherein, movable contact 4 is held in and can moves along opened/closed direction (vertical direction among Fig. 1) between sidewall 11a, 11b.The lower surface opening of each sidewall among sidewall 11a, the 11b of insulating lid 11 is to form bag-shaped parts.When the assembling circuit breaker, bag-shaped parts cover the 10a of foot, the 10b of magnetic drive yoke 10.When the assembling circuit breaker, electric arc change of current plate 9 is arranged between the 10a of foot, the 10b of magnetic drive yoke 10, and outside the lower surface portion of insulating lid 11.
(operation)
Next, the operation of the first embodiment is described with reference to Fig. 3 to 6.
Fig. 3 is the cutaway view that the structure of the current interruptions section that is in closing of contact position is shown.Fig. 4 illustrates near the cutaway view in each contact.Fig. 5 illustrates near the vertical view in each contact.Fig. 6 illustrates contact discontinuities structure when being in the contact open position and the view of electric arc direct of travel.
Under the closure state shown in Fig. 3, suppose that the large electric current I such as short circuit current flows as shown by arrows in FIG..At this moment, as shown in Figure 4, suppose electric current I along perpendicular to the paper direction of Fig. 4 in movable contact 4 from the overhead stream to the bottom.Magnetic flux based on electric current I is concentrated by magnetic drive yoke 10, and passes through along clockwise direction movable contact 4 and magnetic drive yoke 10.In this state, because the magnetic flux through movable contact 4 is crossing with the electric current I of the movable contact 4 of flowing through from left to right in Fig. 4, based on Fleming's left-hand rule, as shown in Figure 4, downward electromagnetic repulsive force (Lorentz force) F1 acts on movable contact 4.
Simultaneously, unshowned over-current detector detects overcurrent and exports trip signal, and in response to this trip signal, opened/closed mechanism promotes movable contact 4 as shown in Figure 3 downwards.Thus, the fixed contact therefor 2 of correspondence and 3 fixed contact 2a and 3a are pulled away from moving contact 4a and the 4b of movable contact 4.
Therefore, with than only adopting electromagnetic repulsive force or only adopting opened/closed mechanism to drive the movable contact 4 of the large speed drive of movable contact and separate with fixed contact therefor.Thus, can improve the interruption performance of circuit breaker.
When the opening operation of fixed contact 2a and 3a and moving contact 4a and 4b are separated contact, between movable contact 4 and fixed contact therefor 2 and 3, producing electric arc.(among Fig. 4 from left to right magnetic flux) intersects because this electric arc A and magnetic flux, and this magnetic flux is strengthened by magnetic drive yoke 10 as shown in Figure 5, and based on Fleming's left-hand rule, power F2 outwards acts on electric arc A along the movable front/rear direction of contact 4.Therefore, as shown in Figure 6, at the electric arc A that produces between the contact from electric arc A1-electric arc A2-electric arc A3-electric arc A4 and each arc-extinction device towards arc-extinction device 6 shifts, these arc-extinction devices 6 outwards arrange along the front/rear direction of movable contacts 4.The electric arc A that is pulled to each arc-extinction device in the arc-extinction device 6 is analyzed, cooling and eliminating.Thus, finish the short circuit interrupt operation.
By doing like this, owing to be arranged on electric arc change of current plate 9 in the circuit breaker, the bottom in movable contact 4 sides of electric arc A moves to electric arc change of current plate 9, and is eliminated, thereby, the electric current movable contact 4 of not flowing through, thus prevent that movable contact 4 from being destroyed by large electric current.
In the prior art, the magnetic body is as the magnetic drive yoke.
Figure 13 is the view of structure of the current interruptions section of traditional circuit breaker.Figure 13 (a) is the vertical view of current interruptions section, and Figure 13 (b) is the front view of current interruptions section.Figure 13 illustrates the integrated example of the magnetic drive yoke 110 that is made of magnet and electric arc change of current plate 109.In other words, this is crooked integratedly to front/rear magnet 110 and electric arc change of current plate 109, and moves into the direction of separating with fixed contact therefor along movable contact 104 and vertically extend.
In this structure, the same with present embodiment when the large current flowing such as short circuit current, produce electromagnetic repulsive force between the contact, movable contact 104 can be operable to fixed contact therefor and separate thus.In addition, after the opening operation of contact, can produce be used to the electromagnetic force that makes the electric arc that between the contact, produces to the arc-extinction device motion.
Yet when magnet was used as the magnetic drive yoke, because the electromagnetic force that is produced by magnet is directly proportional with electric current, the galvanic areas that electric current flowed of the less such as rated current can not produce larger electromagnetic force.For this reason, the electric arc that produces when the opening operation of contact can not be suitably to each arc-extinction device motion.When in current interruptions (when the opening operation of contact) when between the contact, producing electric arc, electric arc be stuck between the contact than the situation in the short distance under, need to interrupt.The distance of opening between the contact needs to increase, to tackle the high voltage in the DC circuit that does not have current zero.The maximization that this causes arc-extinction device and has the equipment of circuit breaker.
Yet, in the present embodiment, owing to the magnetic drive yoke is made of permanent magnet, so no matter how levels of current can both produce constant electromagnetic force.Therefore, even if in the same little galvanic areas with rated current of electric current, also can produce enough electromagnetic forces, and the arc energy that produces between the contact when the opening operation of contact is suitably to each arc-extinction device motion.
As mentioned above, this embodiment can finish current interruptions by the arc-extinction device that effectively utilizes circuit breaker in galvanic areas in a big way.
(effect)
In the first embodiment, as mentioned above, owing to should be arranged to the side surface part of the end of movable contact is remained between them to front/rear magnetic drive yoke, when electric current flows to movable contact under the closure state, can between movable contact and fixed contact therefor, produce stronger electromagnetic repulsive force (Lorentz force), movable contact can be driven into from fixed contact therefor thus and separate.In addition, when the opening operation of contact, the arc energy that produces between the contact is driven into to each arc-extinction device motion by Lorentz force.
Because the magnetic drive yoke is made of permanent magnet, so no matter how levels of current can both obtain constant magnetic flux.Therefore, even in the galvanic areas of less, the arc energy that results from when the opening operation of contact between the contact is driven to move to each arc-extinction device effectively.
Therefore, interrupt although be difficult to carry out in the little galvanic areas in traditional structure direct current, can realize safely in a big way current interruptions by using arc-extinction device.Therefore, the present invention can provide a kind of small-sized arc-extinction device, and this device is applicable to DC circuit and helps to reduce to have the size of the whole equipment of circuit breaker of the present invention.In addition, the parts of circuit breaker can replace with the parts that are exclusively used in alternating current circuit.Therefore, can realize at a low price circuit breaker by the present invention.
The magnetic drive yoke is made of the U-shaped permanent magnet.Therefore, the U-shaped foot of each magnetic drive yoke can keep the side surface part of the end of movable contact securely.Because the magnetic drive yoke is set to individual member, not only electric arc change of current plate can be configured as band shape, can also be than more easily molded electric arc change of current plate when magnetic drive yoke and electric arc change of current plate are integrated, thus increase arranges the degree of freedom of magnetic drive yoke.
In addition, in the process of contact opening operation, near the section's section the contact is filled with the high-pressure conductive gas that is produced by electric arc.Yet the whole foot that covers the magnetic drive yoke with insulating lid can prevent from occurring alternate short circuit between the magnetic drive yoke.
(the second embodiment)
The second embodiment of the present invention is described below.
Although U-shaped magnetic drive yoke 10 is applied to above-mentioned the first embodiment, magnetic drive yoke 10 is constructed integratedly with electric arc change of current plate 9 in a second embodiment.
(structure)
Fig. 7 is the cutaway view according to the structure of the current interruptions section 1 of the second embodiment.
As shown in Figure 7, except the structure of magnetic drive yoke section, the structure of the current interruptions section 1 of present embodiment is identical with the structure of the current interruptions section 1 shown in Fig. 1.Therefore, identical Reference numeral is applied to have parts with those same configuration shown in Fig. 1, and describes in this embodiment heteroid parts.
In the present embodiment, as to the substituting of electric arc change of current plate 9, adopt electric arc change of current plate 19, and as to the substituting of magnetic drive yoke 10, adopt rectangle magnetic drive yoke 20.
Fig. 8 is the exploded perspective view according to the structure of the magnetic drive yoke section of the second embodiment.
As shown in Figure 8, form in the position along the end of the front/rear direction of electric arc change of current plate 19 of movable contact 4 respectively to U-shaped magnet 19a, the 19b of movable contact 4 bendings.
In addition, magnetic drive yoke 20 is made of the rectangle permanent magnet.The lower surface of magnetic drive yoke 20 is fixed to the upper surface of two foots of U-shaped magnet 19a, the 19b of electric arc change of current plate 19, and integrated with electric arc change of current plate 19 thus.By doing like this, magnetic drive yoke 20 is arranged to obtain the polarity shown in Fig. 9 along the Width (side direction) of movable contact 4, and wherein, different magnetic poles face with each other.
When assembling during circuit breaker, magnetic drive yoke 20 is fixed to the upper surface of two foots of U-shaped magnet 19a, the 19b of electric arc change of current plate 19, and have with the first embodiment in the insulating lid 11 of same configuration be positioned on U-shaped magnet 19a, 19b and the magnetic drive yoke 20.
Like this, movably the side surface part of contact 4 is kept by the magnetic drive yoke 20 of the foot that is fixed to U-shaped magnet 19a, 19b.Specifically, make the foot of U-shaped magnet 19a, 19b shorter, with realization magnetic drive yoke 20 is positioned in the range of movement of movable contact 4.
(operation)
The operation of the second embodiment is described below.
Under closure state, when the large electric current I such as short circuit current flows through and when the fixed contact 2a of fixed contact therefor 2 and 3 and moving contact 4a that 3a is pulled away from movable contact 4 and 4b, producing electric arc between movable contact 4 and fixed contact therefor 2 and 3.
Electric arc A as shown in Figure 9 with the magnetic flux interlinkage of being strengthened by magnetic drive yoke 20.Therefore, power F2 outwards acts on electric arc A along the front/rear direction of movable contact 4.Thus, electric arc A moves to each arc-extinction device 6 in each end that is arranged on movable contact 4.
The same with the first embodiment, when the opening operation of contact, result from every current feed path arc energy on every side suitably to each arc-extinction device motion.
(effect)
As mentioned above, the magnetic drive yoke is constructed integratedly with electric arc change of current plate in a second embodiment.Therefore, can easily realize the assembling of circuit breaker and to the management of the parts of circuit breaker.
Equally, because the rectangular shape of magnetic drive yoke, the size of each permanent magnet can be less than the size of the U-shaped magnetic drive yoke of above-mentioned the first embodiment, thereby reduce cost.
(the 3rd embodiment)
The third embodiment of the present invention is described below.
The magnetic drive yoke is fixed to the upper surface that is formed at the U-shaped magnet foot in the electric arc change of current plate in a second embodiment, and in the 3rd embodiment, the magnetic drive yoke is fixed to the inner surface of the foot of U-shaped magnet.
(structure)
As shown in Figure 8, except the structure of magnetic drive yoke section, the structure of the current interruptions section 1 of present embodiment is identical with the structure of the current interruptions section 1 shown in Fig. 1.Therefore, heteroid parts are mainly described in this embodiment.
Figure 10 is the exploded perspective view that illustrates according to the structure of the magnetic drive yoke section of the 3rd embodiment.
As shown in Figure 10, be respectively formed at the end position place along the front/rear direction of electric arc change of current plate 29 of movable contact 4 to U-shaped magnet 29a, the 29b of movable contact 4 bendings.Stage portion 29c is formed at the inboard of two foots of U-shaped magnet 29a, 29b, and magnetic drive yoke 30 is fixed to this stage portion 29c.
When assembling during circuit breaker, magnetic drive yoke 30 is fixed to the stage portion 29c of electric arc change of current plate 29, and have with the first and second embodiment in the insulating lid 11 of same configuration be positioned on U-shaped magnet 29a, 29b and the magnetic drive yoke 30.
Like this, movably the side surface part of contact 4 is maintained between the magnetic drive yoke 30 that is fixed to U-shaped magnet 29a, 19b foot.Specifically, make the foot head of U-shaped magnet 29a, 29b, with realization magnetic drive yoke 30 is positioned in the range of movement of movable contact 4.
(operation)
The operation of the 3rd embodiment is described below.
Under closure state, when the large electric current I such as short circuit current flows through and when the fixed contact 2a of fixed contact therefor 2 and 3 and moving contact 4a that 3a is pulled away from movable contact 4 and 4b, producing electric arc between movable contact 4 and fixed contact therefor 2 and 3.
Electric arc A as shown in Figure 11 with the magnetic flux interlinkage of being strengthened by magnetic drive yoke 30.Therefore, power F2 outwards acts on electric arc A along the front/rear direction of movable contact 4.Thus, electric arc A moves to each arc-extinction device 6 in each end that is arranged on movable contact 4.
The same with the first and second embodiment, when the opening operation of contact, result from every current feed path arc energy on every side and suitably move to each arc-extinction device.
Incidentally, when when magnetic drive yoke 30 being fixed to the upper surface of foot of U-shaped magnet 19a, 19b of electric arc change of current plate 19 with the same way as described in the second embodiment, produce the magnetic leakage flux φ ' of permanent magnet.This structure can not produce for the electromagnetic force that drives the electric arc A that produces towards arc-extinction device 6 between the contact.
In the present embodiment, on the other hand, the magnetic drive yoke 30 of permanent magnet is fixed to the inner surface of the foot of U-shaped magnet 29a, 29b.In other words, U-shaped magnet 29a, 29b are positioned at magnetic drive yoke 30 outsides of permanent magnet.Therefore, can reduce the magnetic leakage flux φ ' of the permanent magnet shown in Figure 12, thereby effectively produce the electromagnetic force that is used for driving towards arc-extinction device 6 the electric arc A that between the contact, produces.
(effect)
As mentioned above, the magnetic drive yoke is constructed integratedly with electric arc change of current plate in the 3rd embodiment.Therefore, can easily realize the management of the parts of the assembling of circuit breaker and circuit breaker.
In addition, because the rectangular shape of magnetic drive yoke, the size of each permanent magnet can be less than the size of the U-shaped magnetic drive yoke of above-mentioned the first embodiment, thereby reduce cost.
In addition, the inner surface of foot that the magnetic drive yoke is fixed to the U-shaped magnet of electric arc change of current plate can reduce the magnetic leakage flux φ of permanent magnet.Therefore, the electric arc that produces between the contact can move to each arc-extinction device effectively.
In addition, by the magnetic drive yoke is fixed in the U-shaped magnet, can make permanent magnet thinner than the magnetic drive yoke of above-mentioned the second embodiment, thereby realize cost.In addition, because the magnetic drive yoke can adhere to stage portion, easier location when the magnetic drive yoke can be fixed to than not adopting any stage portion when the magnetic drive yoke inner surface of foot of U-shaped magnet.Therefore, can simplify the assembling of circuit breaker.
Industrial applicability
The present invention can provide a kind of miniature circuit breaker, and this miniature circuit breaker is applicable to DC circuit, and helps to reduce to have the size of the equipment of circuit breaker.In addition, the parts of circuit breaker can replace with the parts that are exclusively used in alternating current circuit.Thus, the present invention can provide a kind of low price circuit breaker, and it is useful.
Description of reference numerals
1 ... circuit breaker, 2 ... fixed contact therefor, 2a ... fixed contact, 3 ... fixed contact therefor, 3a ... fixed contact, 4 ... movable contact, 4a, 4b ... moving contact, 5 ... contact spring, 6 ... arc-extinction device, 7 ... grid, 8 ... sidewall, 9 ... electric arc change of current plate, 10 ... the magnetic drive yoke, 10a, 10b ... foot, 11 ... insulating lid, 11a, 11b ... sidewall, 19 ... electric arc change of current plate, 19a, 19b ... the U-shaped magnet, 20 ... the magnetic drive yoke, 29 ... electric arc change of current plate, 29a, 29b ... the U-shaped magnet, 29c ... stage portion, 30 ... the magnetic drive yoke
Claims (4)
1. circuit breaker, described circuit breaker comprises in extremely at each: a pair of front/rear fixed contact therefor that arranges with facing with each other; The movable contact of linear motion-type, described movable contact forms the bridgeware between the described fixed contact therefor; And a pair of front/rear magnetic drive yoke, described a pair of front/rear magnetic drive yoke is arranged to the side surface part on the two ends of described movable contact is remained between the described a pair of front/rear magnetic drive yoke,
Wherein, described movable contact makes the current feed path closed by being touched spring press at described fixed contact therefor, and by be opened/close mechanism pushes back to separate with described fixed contact therefor towards described contact spring and opens described current feed path, and
Described magnetic drive yoke is made of permanent magnet.
2. circuit breaker as claimed in claim 1 is characterized in that, described magnetic drive yoke is made of the U-shaped permanent magnet, and each the foot that is arranged in the described magnetic drive yoke remains on the side surface part of described movable contact between the described foot.
3. circuit breaker as claimed in claim 1 is characterized in that, comprising:
A pair of arc-extinction device, described a pair of arc-extinction device is arranged on the place ahead and the rear of described movable contact; And
Electric arc change of current plate, described electric arc change of current plate is with below being arranged on described movable contact in the mode of extending above the described arc-extinction device and the bottom in movable contact side of electric arc is carried out the change of current, described electric arc results from when current interruptions between described movable contact and the described fixed contact therefor
Described electric arc change of current plate has the pair of U-shaped magnet towards described movable contact bending, and
Described magnet is made of the rectangle permanent magnet, and the lower surface of being arranged to described magnet is fixed to the upper surface of two foots of described U-shaped magnet, remains between the described foot with the side surface with described movable contact.
4. circuit breaker as claimed in claim 1 is characterized in that, comprising:
A pair of arc-extinction device, described a pair of arc-extinction device is arranged on the place ahead and the rear of described movable contact; And
Electric arc change of current plate, described electric arc change of current plate is with below being arranged on described movable contact in the mode of extending above the described arc-extinction device and the bottom in movable contact side of electric arc is carried out the change of current, described electric arc results from when current interruptions between described movable contact and the described fixed contact therefor
Described electric arc change of current plate has the pair of U-shaped magnet towards described movable contact bending, and
Described magnetic drive yoke is made of the rectangle permanent magnet, and the inner surface of being arranged to the foot by being fixed to described U-shaped magnet remains on the side surface part of described movable contact between the described foot.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2010180988A JP2012043541A (en) | 2010-08-12 | 2010-08-12 | Circuit breaker |
| JP2010-180988 | 2010-08-12 | ||
| PCT/JP2011/003241 WO2012020526A1 (en) | 2010-08-12 | 2011-06-08 | Circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103069532A true CN103069532A (en) | 2013-04-24 |
Family
ID=45567502
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011800392002A Pending CN103069532A (en) | 2010-08-12 | 2011-06-08 | Circuit breaker |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP2605265A4 (en) |
| JP (1) | JP2012043541A (en) |
| KR (1) | KR101377342B1 (en) |
| CN (1) | CN103069532A (en) |
| TW (1) | TWI446392B (en) |
| WO (1) | WO2012020526A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106409565A (en) * | 2015-07-30 | 2017-02-15 | 嘉灵科技有限公司 | Polarity insensitive arc quench |
| CN107533931A (en) * | 2015-03-06 | 2018-01-02 | 库珀技术公司 | The fusible turn-off switchgear of high-tension compact type with magnetic arc yoke assembly |
| CN109817478A (en) * | 2017-11-22 | 2019-05-28 | 嘉灵科技有限公司 | Monopole DC breaker with two-way arc chamber |
Families Citing this family (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6066598B2 (en) | 2012-07-04 | 2017-01-25 | 富士通コンポーネント株式会社 | Electromagnetic relay |
| JP6044927B2 (en) * | 2012-09-13 | 2016-12-14 | パナソニックＩｐマネジメント株式会社 | DC switch and DC circuit breaker |
| JP5990281B2 (en) * | 2012-12-06 | 2016-09-07 | 富士電機機器制御株式会社 | Contact device and electromagnetic switch using the same |
| JP6342724B2 (en) * | 2014-06-13 | 2018-06-13 | 富士電機株式会社 | Circuit breaker |
| EP3229250B1 (en) * | 2014-12-01 | 2019-07-17 | Mitsubishi Electric Corporation | Dc high-speed circuit breaker |
| DE102015000796B4 (en) | 2015-01-22 | 2017-03-02 | Schaltbau Gmbh | Switching device with permanent magnetic arc extinguishing |
| US9601297B2 (en) | 2015-03-23 | 2017-03-21 | Cooper Technologies Company | High voltage compact fuse assembly with magnetic arc deflection |
| US10854414B2 (en) | 2016-05-11 | 2020-12-01 | Eaton Intelligent Power Limited | High voltage electrical disconnect device with magnetic arc deflection assembly |
| US11205546B2 (en) * | 2017-07-26 | 2021-12-21 | Mitsubishi Electric Corporation | Switch |
| US10636607B2 (en) | 2017-12-27 | 2020-04-28 | Eaton Intelligent Power Limited | High voltage compact fused disconnect switch device with bi-directional magnetic arc deflection assembly |
| US11908648B2 (en) * | 2020-01-23 | 2024-02-20 | Mitsubishi Electric Corporation | Switch configured to form magnetic fields relative to contact points |
| KR20210115323A (en) | 2020-03-12 | 2021-09-27 | 엘에스일렉트릭(주) | Base assembly and molded-case circuit breaker |
| KR102556749B1 (en) | 2020-03-13 | 2023-07-18 | 엘에스일렉트릭(주) | Air circuit breaker include the same |
| CN114388313B (en) * | 2021-12-24 | 2024-03-12 | 上海京硅智能技术有限公司 | Direct-acting breaker |
| GB2624720A (en) * | 2022-11-22 | 2024-05-29 | Eaton Intelligent Power Ltd | Switching device with terminal contacts |
| WO2024110063A1 (en) * | 2022-11-22 | 2024-05-30 | Eaton Intelligent Power Limited | Switching device with terminal contacts |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01319217A (en) * | 1988-06-20 | 1989-12-25 | Fuji Electric Co Ltd | Arc-extinguish chamber of switching equipment |
| CN1080429A (en) * | 1992-02-11 | 1994-01-05 | 泰利梅卡尼克公司 | The open circuit fault of circuit breaker |
| JPH10154458A (en) * | 1996-11-25 | 1998-06-09 | Matsushita Electric Works Ltd | Direct current circuit breaker |
| US6103986A (en) * | 1998-04-07 | 2000-08-15 | Fuji Electric Co., Ltd. | Circuit breaker including bridging contact with magnetic structure |
| CN1332467A (en) * | 2000-07-07 | 2002-01-23 | 富士电机株式会社 | Circuit protector |
| JP2005216807A (en) * | 2004-02-02 | 2005-08-11 | Fuji Electric Fa Components & Systems Co Ltd | Circuit breaker |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4013984A (en) * | 1975-08-22 | 1977-03-22 | Westinghouse Electric Corporation | Current limiting circuit breaker |
| JPS5914219A (en) * | 1982-07-16 | 1984-01-25 | 富士電機株式会社 | Dc electromagnetic contactor |
| ZA896375B (en) * | 1988-09-12 | 1990-05-30 | Westinghouse Electric Corp | Circuit breaker with arc gun |
| EP1168392B1 (en) * | 1999-10-14 | 2005-05-04 | Matsushita Electric Works, Ltd. | Contactor |
| DE10343005B4 (en) * | 2003-09-17 | 2005-10-27 | Siemens Ag | Switching device and method for its production |
| JP4419642B2 (en) | 2004-03-30 | 2010-02-24 | 富士電機機器制御株式会社 | Circuit breaker arc extinguishing device |
-
2010
- 2010-08-12 JP JP2010180988A patent/JP2012043541A/en active Pending
-
2011
- 2011-06-08 CN CN2011800392002A patent/CN103069532A/en active Pending
- 2011-06-08 WO PCT/JP2011/003241 patent/WO2012020526A1/en active Application Filing
- 2011-06-08 EP EP11816196.7A patent/EP2605265A4/en not_active Withdrawn
- 2011-06-08 KR KR1020137003569A patent/KR101377342B1/en not_active IP Right Cessation
- 2011-08-04 TW TW100127728A patent/TWI446392B/en not_active IP Right Cessation
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01319217A (en) * | 1988-06-20 | 1989-12-25 | Fuji Electric Co Ltd | Arc-extinguish chamber of switching equipment |
| CN1080429A (en) * | 1992-02-11 | 1994-01-05 | 泰利梅卡尼克公司 | The open circuit fault of circuit breaker |
| JPH10154458A (en) * | 1996-11-25 | 1998-06-09 | Matsushita Electric Works Ltd | Direct current circuit breaker |
| US6103986A (en) * | 1998-04-07 | 2000-08-15 | Fuji Electric Co., Ltd. | Circuit breaker including bridging contact with magnetic structure |
| CN1332467A (en) * | 2000-07-07 | 2002-01-23 | 富士电机株式会社 | Circuit protector |
| JP2005216807A (en) * | 2004-02-02 | 2005-08-11 | Fuji Electric Fa Components & Systems Co Ltd | Circuit breaker |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107533931A (en) * | 2015-03-06 | 2018-01-02 | 库珀技术公司 | The fusible turn-off switchgear of high-tension compact type with magnetic arc yoke assembly |
| CN107533931B (en) * | 2015-03-06 | 2020-07-28 | 伊顿智能动力有限公司 | High-voltage compact fusible disconnect switch device with magnetic arc deflection assembly |
| CN106409565A (en) * | 2015-07-30 | 2017-02-15 | 嘉灵科技有限公司 | Polarity insensitive arc quench |
| CN106409565B (en) * | 2015-07-30 | 2018-11-02 | 嘉灵科技有限公司 | The insensitive arc extinguishing of polarity |
| CN109817478A (en) * | 2017-11-22 | 2019-05-28 | 嘉灵科技有限公司 | Monopole DC breaker with two-way arc chamber |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20130044319A (en) | 2013-05-02 |
| EP2605265A4 (en) | 2014-09-10 |
| WO2012020526A1 (en) | 2012-02-16 |
| JP2012043541A (en) | 2012-03-01 |
| TW201230118A (en) | 2012-07-16 |
| TWI446392B (en) | 2014-07-21 |
| EP2605265A1 (en) | 2013-06-19 |
| KR101377342B1 (en) | 2014-03-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103069532A (en) | Circuit breaker | |
| US8222983B2 (en) | Single direct current arc chamber, and bi-directional direct current electrical switching apparatus employing the same | |
| US9378914B2 (en) | Contact device and electromagnetic contactor using the same | |
| KR101750137B1 (en) | Contact mechanism and electromagnetic contactor using same | |
| CN103262200A (en) | Circuit breaker | |
| US20150002250A1 (en) | Electromagnetic contactor | |
| MX2015003013A (en) | Single direct current arc chute, and bi-directional direct current electrical switching apparatus employing the same. | |
| AU2008201060B2 (en) | Slot motor housing and circuit interrupter including the same | |
| US20150170857A1 (en) | Electromagnetic actuator for a medium voltage vacuum circuit breaker | |
| JP5600577B2 (en) | Contact mechanism and electromagnetic contactor using the same | |
| CN108352266B (en) | Electrical switchgear and slot motor therefor | |
| EP2973632B1 (en) | Arc chamber for bi-directional dc | |
| US7482902B2 (en) | Linear magnetic drive | |
| RU2592634C2 (en) | Power contact device with electrodynamic compensation in presence of high currents | |
| JP2014183028A (en) | Circuit breaker | |
| KR102290582B1 (en) | switch | |
| CN102959672A (en) | Contact mechanism and electromagnetic contactor using same | |
| KR101565454B1 (en) | Direct current switch and direct current circuit breaker | |
| JP2015028904A (en) | Circuit breaker | |
| CN209912771U (en) | Magnetic blowout system of molded case direct current circuit breaker | |
| JP2023090676A (en) | Contact assembly and clapper-type relay | |
| JP2012150986A (en) | 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 | ||
| C05 | Deemed withdrawal (patent law before 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130424 |