Shunt release and circuit breaker

Abstract

A shunt release and a circuit breaker having the shunt release, the shunt release comprises a driving member and a release, and also comprises a release member and a spring connected with the release member, the release comprises a permanent magnet, a coil and an iron core, the coil can drive the iron core to move from a first position to a second position when the coil is electrified, and the coil can drive the permanent magnet to move from the first position to the second position when the coil is electrified. The iron core releases the spring after crossing the second position, so that the spring releases energy to push the tripping piece to trigger the operation mechanism to trip and drive the iron core to move to a third position; when the driving part moves to a first driving position, the tripping part is driven to move and reset, the iron core is driven to at least move to a second position from a third position, the permanent magnet can attract the iron core located at the second position, the iron core is made to move to the first position and compress the spring, and the stroke of the iron core is prolonged to the third position from the second position. Tripping can be performed by triggering the operation mechanism, and then the iron core is driven by the driving piece to move to the second position to be re-attracted with the permanent magnet.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of low-voltage electrical apparatus, and particularly relates to a separate excitation release and circuit breaker. BACKGROUND

[0002] The high-voltage direct-current molded case circuit breaker is customized for the rapid demand of the new energy industry, especially in the photovoltaic system with a current range of 200A to 400A. In the actual use process, the high-voltage direct-current molded case circuit breaker can realize function expansion by installing internal accessories, such as a separate excitation release. The existing separate excitation release has the problem of short iron core stroke, and cannot reliably trigger the release. However, if the iron core stroke of the separate excitation release is increased, the iron core will be difficult to reset, resulting in poor stability of the separate excitation release. In addition, the existing separate excitation release also has the problem of high power consumption. If the coil of the separate excitation release is powered for a long time, the separate excitation release is also easy to burn out. SUMMARY

[0003] The utility model aims at overcoming at least one defect of the prior art, and provides a separate excitation release.

[0004] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0005] A separate excitation release includes a driving member and a release, and further includes a release member for triggering the release of the operating mechanism of the circuit breaker and a spring connected with the release member. The driving member can move between a first driving position and a second driving position,

[0006] The release includes a permanent magnet, a coil and an iron core. The iron core can move between a first position, a second position and a third position. The second position is located between the first position and the third position,

[0007] The release member is connected with the iron core. When the iron core is attracted by the permanent magnet and located at the first position, the release member drives the spring to compress. The coil can drive the iron core to move from the first position to the second position when powered. After the iron core passes the second position, the spring is released to drive the release member to trigger the release of the operating mechanism and drive the iron core to move to the third position. When the driving member moves to the first driving position, the driving member drives the release member to reset and drives the iron core to move from the third position to at least the second position. The permanent magnet can attract the iron core located at the second position to move to the first position and compress the spring.

[0008] Preferably, the separate excitation release further includes a micro switch and a power supply circuit. The micro switch is connected in series between the release and the power supply circuit,

[0009] The driving member is located in the second driving position to make the micro switch conductive, so that the power supply circuit can supply power to the coil of the tripping device through the micro switch,

[0010] The driving member is located in the first driving position to make the micro switch non-conductive, so that the micro switch cuts off the power supply circuit and the coil of the tripping device.

[0011] Preferably, the driving member includes a driving part, a triggering part and a pushing part, the triggering part is used to trigger the micro switch to switch state, and the pushing part is used to push the tripping device to move the iron core from the third position to the second position.

[0012] Preferably, the tripping device is arranged below the iron core, and the moving direction of the iron core and the moving direction of the tripping device are arranged in parallel.

[0013] Preferably, the driving member is arranged on the side of the tripping device perpendicular to the moving direction of the tripping device, and the moving directions of the tripping device and the driving member are arranged in parallel.

[0014] Preferably, the tripping device further includes a shell and a magnetic yoke arranged in the shell, the magnetic yoke is internally provided with a coil former, the middle part of the coil former is provided with a first sleeve, the iron core is movably arranged in the first sleeve, the coil is arranged outside the first sleeve, the tripping device includes a supporting part and a second sleeve arranged on the side of the supporting part, the inner diameter of the second sleeve is greater than the outer diameter of the first sleeve, the second sleeve can be sleeved outside the first sleeve, and the two ends of the spring are sleeved outside the first sleeve and the second sleeve respectively, and the spring is limited between the coil former and the tripping device.

[0015] Preferably, the iron core includes a suction part and a pulling part arranged coaxially, the radius of the suction part is greater than the radius of the pulling part, the end surface connecting the suction part and the pulling part is provided with an annular limiting surface, the suction part is arranged in the first sleeve, one end of the first sleeve close to the tripping device is provided with a circular blocking surface, the middle part of the blocking surface is provided with a pulling hole for extending the pulling part, and the pulling part is connected with the second sleeve, and when the coil attracts the suction part, the pulling part is used to drive the tripping device to move.

[0016] Preferably, it further includes a buffer spring sleeved outside the pulling part, and the two ends of the buffer spring are in contact with the suction part and the tripping device respectively.

[0017] Preferably, the iron core further comprises a limiting portion arranged perpendicularly to the pulling portion, the limiting portion comprises two limiting protrusions arranged oppositely on both sides of the pulling portion in the radial direction, the second sleeve is provided with a limiting hole for passing through the limiting portion, the shape of the limiting hole matches the shape of the limiting portion, the second sleeve is provided with two limiting grooves on the side away from the coil, the two limiting grooves are arranged oppositely on both sides of the limiting hole, and the limiting portion can be rotated to a misaligned position with the limiting hole after passing through the limiting hole, and the two limiting protrusions at both ends of the limiting portion are inserted into the two limiting grooves on both sides of the limiting hole respectively to limit the limiting portion.

[0018] Preferably, the tripping piece comprises a reset portion and a tripping portion arranged oppositely on both sides of the axis of the second sleeve, the reset portion and the tripping portion are connected with the supporting portion respectively, the pushing portion of the driving piece can push the reset portion to move the iron core from the third position to the second position driven by the tripping piece, and the tripping portion is used for triggering the tripping of the operating mechanism.

[0019] Preferably, the shell comprises a lower shell and an upper shell covering the lower shell, the upper shell is used for accommodating the tripper, the lower shell is used for accommodating the tripping piece, the upper shell is provided with a clamping jaw for limiting the magnetic yoke of the tripper, and the lower shell is provided with a limiting column for inserting into the upper shell to limit the magnetic yoke of the tripper.

[0020] Preferably, the top side of the upper shell is provided with a wiring hole and a rib, the wiring hole is used for passing through the wire, the rib is protruded inward, the bottom of the rib is used for limiting the tripper, and the side of the rib is used for limiting the wire, the two ends of the coil pass through two wires respectively in series with the micro switch, and the wires extend from the wiring hole to above the shell.

[0021] Preferably, the outer side of the upper shell is provided with a mounting column for limiting the micro switch, the micro switch is provided with a mounting hole for sleeving on the mounting column for limiting, the lower shell is provided with a baffle, and the micro switch is located between the baffle and the upper shell after the upper shell and the lower shell are assembled.

[0022] Preferably, the limiting portion of the driving piece is in the form of a plate, and the driving portion and the triggering portion are protruded and arranged on two opposite sides of the limiting portion respectively.

[0023] A circuit breaker comprises the split excitation tripper and at least two phase pole units arranged side by side, one of the phase pole units is provided with an operating mechanism above, the split excitation tripper is arranged above the other phase pole unit, each phase pole unit is respectively provided with a moving contact and a stationary contact, the driving piece is located at the second driving position when the moving contact and the stationary contact are in contact, and the driving piece is located at the first driving position when the moving contact and the stationary contact are separated.

[0024] Preferably, the upper side of the driving member and the side of the tripping device are provided with an auxiliary module, the auxiliary module comprises a micro switch, and the driving member is provided with a second trigger rod for triggering the auxiliary module.

[0025] Preferably, the driving member is provided with two second trigger rods, and two auxiliary modules are correspondingly arranged above the driving member, the two second trigger rods are arranged in the same plane, and the two second trigger rods are arranged perpendicularly to the trigger rod.

[0026] Preferably, when the iron core is in the first position, the tripping device is arranged above the traction rod in the height direction of the circuit breaker, and when the iron core moves from the first position to the third position, the tripping device pushes the traction rod downward in the height direction of the circuit breaker.

[0027] Preferably, the moving direction of the tripping device is arranged in parallel with the height direction of the circuit breaker.

[0028] The shunt trip device of the embodiment has the characteristics of small size and high reliability.

[0029] In addition, the power supply circuit for supplying power to the tripping device is controlled by the driving member and the micro switch, and the power supply circuit can supply power to the tripping device when the micro switch is closed. At this time, the power supply circuit can control the tripping device to trip the trigger operating mechanism, so that the driving member is triggered to turn off the micro switch, thereby disconnecting the power supply circuit and the tripping device, preventing the power supply circuit from supplying power to the tripping device after the operating mechanism trips, avoiding the tripping device from being burned out, and saving electric energy.

[0030] The embodiment also provides a circuit breaker, which comprises at least two parallelly arranged phase pole units, each phase pole unit is respectively provided with a movable contact and a static contact, the movable contacts of the at least two phase pole units are arranged on a rotating shaft, and the rotating shaft drives the movable contacts and the static contacts of the at least two phase pole units to contact and separate, one phase pole unit is provided with an operating mechanism, and the shunt trip device is arranged above another phase pole unit, and has the characteristics of small size, low heat generation and high reliability. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 is a structural schematic view of the shunt trip device of the utility model;

[0032] Figure 2 is a sectional view of the shunt trip device of the utility model;

[0033] Figure 3 is the exploded view of the split excitation release of the utility model;

[0034] Figure 4 is the closing schematic view of the circuit breaker of the utility model;

[0035] Figure 5 is the release schematic view of the circuit breaker of the utility model;

[0036] Figure 6 is the structure schematic view of the upper shell of the utility model;

[0037] Figure 7 is the structure schematic view of the lower shell of the utility model;

[0038] Figure 8 is the structure schematic view of the release of the utility model;

[0039] Figure 9 is the structure schematic view of the drive of the utility model;

[0040] In the figure:

[0041] 1 drive 37 first sleeve

[0042] 2 release 61 moving contact

[0043] 3 release 62 rotating shaft

[0044] 4 micro switch 64 operating mechanism

[0045] 5 wire 65 traction rod

[0046] 7 buffer spring 321 suction part

[0047] 11 drive part 322 pulling part

[0048] 12 push part 323 limiting surface

[0049] 13 trigger part 324 limiting part

[0050] 14 second trigger rod 341 lower shell

[0051] 21 support part 342 upper shell

[0052] 22 second sleeve 343 buckle

[0053] 23 limiting hole 344 clamping groove

[0054] 24 limiting groove 345 clamping claw

[0055] 25 reset part 346 limiting column

[0056] 26 trip part 347 mounting column

[0057] 30 permanent magnet 348 baffle

[0058] 31 Coil 371 Blocking surface

[0059] 32 iron core 3421 connecting plate

[0060] 33 Spring 3422 Wiring hole

[0061] 35 yoke 3423 ribs

[0062] 36 Coil skeleton DETAILED DESCRIPTION

[0063] The following embodiments are given in conjunction with the accompanying drawings to further illustrate the specific implementation of the shunt release of the present invention. The shunt release of the present invention is not limited to the description of the following embodiments.

[0064] like Figures 1-5 As shown, the shunt release of this embodiment includes a driver 1, a release 2, a release 3, and a spring 33 connected to the release 2. The shunt release is installed in the circuit breaker. When the release 3 is energized, it can trigger the release 2 to move to trigger the circuit breaker's operating mechanism to trip, causing the circuit breaker to open. The driver 1 can move between a first drive position and a second drive position. The position of the driver 1 is synchronized with the opening and closing state of the circuit breaker. When the circuit breaker is opened, the driver 1 will be driven to the first drive position. When the driver 1 moves to the first drive position, the release 2 and the release 3 can be reset. When the circuit breaker is closed, the driver 1 moves to the second drive position. In this embodiment, the driver 1 is driven by a rotating shaft 62 equipped with a moving contact 61. In other embodiments, the driver 1 can also be driven by the handle or operating mechanism of the circuit breaker.

[0065] The tripping device 3 of the embodiment comprises a permanent magnet 30, a coil 31 and a core 32, the core 32 is movable between a first position, a second position and a third position, the second position is between the first position and the third position; the tripping device 2 is connected with the core 32, when the core 32 is attracted by the permanent magnet 30 and located at the first position, the tripping device 2 drives the spring 33 to compress and store energy for the spring 33, the coil 31 can drive the core 32 to move from the first position to the second position when energized, the core 32 releases the spring 33 after passing the second position, the electromagnetic force of the coil 31 acting on the core 32 overcomes the attraction of the permanent magnet 30 to drive the core 32 to move, so that the spring 33 releases energy to drive the tripping device 2, the tripping device 2 triggers the operating mechanism 64 to trip and drives the core 32 to move to the third position; after the operating mechanism 64 trips to open the circuit breaker, the rotating shaft 62 of the circuit breaker drives the driving device 1 to move to the first driving position, when the driving device 1 moves to the first driving position, it can drive the tripping device 2 to move to reset and drive the core 32 to move from the third position to at least the second position, i.e. the core 32 moves to the second position or passes the second position, the permanent magnet 30 can attract the core 32 located at the second position to move the core 32 to the first position to reset and compress the spring 33. That is, when the core 32 moves from the third position to the second position or to a position between the second position and the first position, the permanent magnet 30 can attract the core 32 to move to the first position.

[0066] The split excitation tripping device of the embodiment, the tripping part 2 simultaneously plays two roles of triggering tripping and driving the core 32 to reset, the core 32 cannot be attracted by the permanent magnet 30 after passing the second position, but its stroke is extended from the second position to the third position, and the spring 33 drives the tripping part 2 to trigger the operation mechanism to trip, which can reliably trigger the operation mechanism to trip, and after triggering the operation mechanism to trip, the driving part 1 is driven by the circuit breaker to move to the first driving position, the driving part 1 drives the core 32 to move back to the second position where it can be attracted by the permanent magnet 30 through the tripping part 2, and the core 32 is reset by being re-attracted by the permanent magnet 30, which has the characteristics of small size and high reliability. Further, it further includes a micro switch 4 and a power supply circuit, the micro switch 4 is connected in series between the tripping device 3 and the power supply circuit, the micro switch 4 is turned on when the driving part 1 is in the second driving position, so that the power supply circuit can supply power to the coil 31 of the tripping device 3 through the micro switch 4, at this time the driving circuit supplies power to the tripping device 3 when receiving a control signal, which can trigger the moving core 32 to move to the second position against the attraction of the permanent magnet 30, and the micro switch 4 can be turned off when the driving part 1 is in the first driving position, so that the micro switch 4 cuts off the power supply circuit and the coil 31 of the tripping device 3. The tripping device 3 of the embodiment controls the power supply circuit that supplies power to the tripping device 3 through the driving part 1 and the micro switch 4, and the power supply circuit can supply power to the tripping device 3 when the micro switch 4 is closed, at this time the power supply circuit can control the tripping device 3 to trigger the operation mechanism to trip, so that the rotating shaft 62 drives the driving part 1 to turn off the micro switch 4, disconnecting the power supply circuit and the tripping device 3, preventing the power supply circuit from supplying power to the tripping device 3 after the operation mechanism trips, which not only avoids the tripping device 3 from burning out, but also saves electric energy.

[0067] Further, the driving part 1 includes a driving part 11, a triggering part 13 and a pushing part 12, the triggering part 13 and the pushing part 12 cooperate with the micro switch 4 and the tripping part 2 respectively, the triggering part 13 is used to trigger the micro switch 4, and the pushing part 12 is used to push the tripping part 2 to drive the core 32 to move from the third position to the second position; the triggering part 13 is used to trigger the micro switch 4 to switch state; and the driving part 11 is used to cooperate with the rotating shaft 62 or handle or operation mechanism of the circuit breaker.

[0068] Reference Figure 5 When the moving contact 61 is separated from the stationary contact, that is, during the process of switching the circuit breaker to the open or tripping, the rotating shaft 62 drives the driving part 1 to move upward through the driving part 11, the driving part 1 moves to the first driving position, drives the core 32 to move from the third position to the second position, the permanent magnet 30 can attract the core 32 located at the second position to move the core 32 to the first position, and the driving part 1 can trigger the micro switch 4 to turn off when it is in the first driving position, so that the micro switch 4 cuts off the power supply circuit and the coil 31 of the tripping device 3.

[0069] Reference Figure 4 , the drive part 11 in the moving contact 61 and static contact when, namely the circuit breaker switching to the process of closing, the shaft 62 moves down, the drive piece 1 can rely on gravity or drive piece spring figure not shown drive moves to the second drive position, drive piece 1 through the trigger part 13 trigger the micro switch 4 is closed, the power supply circuit is in the state can be for the tripping device 3 power supply, at this time the core 32 is attracted by the permanent magnet 30 and kept in the first position, at this time the power supply circuit if for tripping device 3 power supply, tripping device 3 drive the tripping piece 2 to move down to move across the second position and release the spring 33, so that the spring 33 drive tripping piece 2 trigger operating mechanism 64 tripping. Operating mechanism 64 tripping then drive the moving contact 61 and static contact apart, the shaft 62 through the drive part 11 drive drive piece 1 to move up to the first drive position, drive piece 1 through the trigger part 13 trigger the micro switch 4 cut off the power supply circuit stop for tripping device 3 power supply, at the same time drive piece 1 push tripping piece 2 drive the core 32 to the second position, so that the permanent magnet 32 can attract the core 32 to the first position, that is, switched to Figure 5 the state shown.

[0070] If the normal breaking of the circuit breaker, namely operating mechanism 64 without tripping, the shaft 62 through the drive part 11 drive drive piece 1 to move up to the first drive position, drive piece 1 through the trigger part 13 trigger the micro switch 4 cut off the power supply circuit stop for tripping device 3 power supply, under the action of the permanent magnet 30, the core 32 is in the first position, drive the tripping piece 2 compression spring 33.

[0071] As Figures 2-3 shown, the tripping device 3 also includes a housing, and the magnetic yoke 35 is arranged in the housing, the magnetic yoke 35 is internally provided with the coil former 36, the middle part of the coil former 36 is provided with the first sleeve 37, the core 32 is movably arranged in the first sleeve 37, the coil 31 is arranged outside the first sleeve 37, the tripping piece 2 includes a flat plate shaped support part 21, and the second sleeve 22 is located on the side surface of the support part 21, the inner diameter of the second sleeve 22 is greater than the outer diameter of the first sleeve 37, the second sleeve 22 can be sleeved outside the first sleeve 37, the both ends of the spring 33 are respectively sleeved outside the first sleeve 37 and the second sleeve 22, and the spring 33 is limited between the coil former 36 and the tripping piece 2.

[0072] Further, the iron core 32 comprises a coaxially arranged attraction part 321 and a pulling part 322, the radius of the attraction part 321 is greater than that of the pulling part 322, and the end surface of the attraction part 321 connected with the pulling part 322 is provided with an annular limiting surface 323, the attraction part 321 is arranged in the first sleeve 37, the one end of the first sleeve 37 close to the tripping piece 2 is provided with a circular blocking surface 371, the middle part of the blocking surface 371 is provided with a pulling hole for extending the pulling part 322, and the pulling part 322 is connected with the second sleeve 22, when the coil 31 attracts the attraction part 321, the pulling part 322 is used to drive the tripping piece 2 to move away from the traction rod 65.

[0073] Further, the iron core 32 further comprises a limiting part 324 arranged perpendicularly to the pulling part 322, the limiting part 324 comprises two limiting protrusions arranged oppositely on the two sides of the pulling part 322 in the radial direction, the second sleeve 22 is provided with a limiting hole 23 for passing through the limiting part 324, the shape of the limiting hole 23 matches that of the limiting part 324, the second sleeve 22 is provided with two limiting grooves 24 on the side away from the coil 31, the two limiting grooves 24 are arranged oppositely on the two sides of the limiting hole 23, the limiting part 324 can be rotated to a position out of alignment with the limiting hole 23 after passing through the limiting hole 23, and the two limiting protrusions at the two ends of the limiting part 324 are respectively inserted into the two limiting grooves 24 on the two sides of the limiting hole 23 to limit, so as to realize the connection between the iron core 32 and the tripping piece 2.

[0074] Further, it further comprises a buffer spring 7 sleeved outside the pulling part 322, the two ends of the buffer spring 7 are respectively in contact with the attraction part 321 and the tripping piece 2, and the buffer spring 7 can play a buffering role between the iron core 32 and the tripping piece 2.

[0075] Further, the tripping piece 2 is arranged below the iron core 32, and the moving direction of the iron core 32 and the moving direction of the tripping piece 2 are arranged in parallel, so as to save the space occupied in the transverse direction and leave space for accommodating other parts on the side, such as other auxiliary modules.

[0076] Further, the driving piece 1 is arranged on the side of the tripping piece 2 perpendicularly to the moving direction of the tripping piece 2, and the moving direction of the tripping piece 2 and the driving piece 1 is arranged in parallel, so as to also save the space occupied in the transverse direction.

[0077] Further, the tripping piece 2 comprises a reset part 25 and a tripping part 26 arranged oppositely on the two sides of the axis of the second sleeve 22, the reset part 25 and the tripping part 26 are respectively connected with the supporting part 21, the reset part 25 cooperates with the pushing part 12 of the driving piece 1, the pushing part 12 of the driving piece 1 is used to push the reset part 25 to drive the iron core 32 to move to the second position, and the tripping part 26 is used to push the traction rod 65 to trigger the operating mechanism 64 to trip.

[0078] AsFigure 3 、 6 -7, the shell includes a lower shell 341 and an upper shell 342 covering the lower shell 341, the upper shell 342 is used to accommodate the release 3, and the lower shell 341 is used to accommodate the release part 2. After the upper shell 342 and the lower shell 341 are assembled, they are limited by the buckle 343 and the slot 344. The upper shell 342 is provided with a claw 345 for limiting the yoke 35 of the release 3, and the lower shell 341 is provided with a limiting column 346. The limiting column 346 is used to be inserted into the upper shell 342 to limit the yoke 35 of the release 3.

[0079] Preferably, the outer side of the upper shell 342 is provided with a mounting column 347 for limiting the micro switch 4, and the micro switch 4 is provided with a mounting hole for limiting the position on the mounting column 347. The lower shell 341 is provided with a baffle 348. The micro switch 4 is located between the baffle 348 and the upper shell 342 after the upper shell 342 and the lower shell 341 are assembled.

[0080] Furthermore, a raised connecting plate 3421 is provided on the side of the upper shell 342, and a connecting hole is provided on the connecting plate 3421, which is used to connect to the shell of the circuit breaker. A wiring hole 3422 and a rib 3423 are provided on the top side of the upper shell 342. The wiring hole 3422 is used to pass the wire 5, and the rib 3423 protrudes inward. The bottom of the rib 3423 is used to limit the release 3, and the side of the rib 3423 is used to limit the wire 5. There are two wires 5, which are respectively connected to the two ends of the coil 31 and then connected in series with the micro switch 4. After being knotted, they extend from the wiring hole 3422 at the top of the upper shell 342 to the top of the shell. Since the tensile force of the welding point between the wire 5 and the coil 31 is relatively small, usually only about 12N, by tying the wire 5 and extending it from the top of the upper shell 342, the tensile force of the wire 5 can be increased, the reliability of the connection of the wire 5 can be improved, and the problem of poor contact can be avoided.

[0081] like Figures 4-5 As shown in Figures 9 and 9, the pushing portion 12 of the driving member 1 is plate-shaped, and the driving portion 11 and the triggering portion 13 are respectively protruded and arranged on two opposite side surfaces of the pushing portion 12. The driving portion 11 is protruded and arranged on the side of the pushing portion 12 close to the rotating shaft 62, and the triggering portion 13 is protruded and arranged on the side of the pushing portion 12 away from the rotating shaft 62.

[0082] The embodiment also provides a circuit breaker, comprising at least two phase pole units arranged side by side, each phase pole unit is respectively provided with a moving contact 61 and a stationary contact, the moving contacts 61 of the at least two phase pole units are arranged on a rotating shaft 62, the rotating shaft 62 drives the moving contacts 61 of the at least two phase pole units to contact and separate from the stationary contacts, an operating mechanism 64 is arranged above one of the phase pole units, the tripping device 3 is arranged above the other phase pole unit, when the moving contact contacts the stationary contact, the driving member is located at the second driving position, when the moving contact separates from the stationary contact, the driving member is located at the second driving position; a traction rod 65 is arranged on the side of the operating mechanism 64, when the tripping device 2 is away from the traction rod 65, the iron core 32 is located at the first position and drives the tripping device 2 to compress the spring 33, when the tripping device 2 drives the traction rod 65 to drive the operating mechanism 64 to trip, the iron core 32 is located at the third position, and the circuit breaker has the characteristics of small volume, low heat generation and high reliability.

[0083] Further, an auxiliary module (not shown in the figure) is arranged above the driving member 1 and on the side of the tripping device 3, the auxiliary module comprises a micro switch, the driving member 1 is provided with a second trigger rod 14 for triggering the auxiliary module, the second trigger rod 14 is used for driving the micro switch to switch an output signal, and the output signal is used for indicating the state of the circuit breaker, indicating that the circuit breaker is in a closed state or an open state or a tripping state, two second trigger rods 14 are arranged in the embodiment, two auxiliary modules are correspondingly arranged above the driving member 1, the two auxiliary modules can be alarm modules or auxiliary contact modules, or can be alarm modules or auxiliary contact modules respectively, or can be auxiliary modules with other functions, the alarm module is used for outputting a signal when the circuit breaker is in the tripping state, indicating that the circuit breaker is tripped and opened due to a fault, the auxiliary contact module is used for indicating the open and closed states of the circuit breaker, and the two second trigger rods 14 are respectively used for triggering the micro switch 4 of the auxiliary module to switch an output state.

[0084] Preferably, the two second trigger rods 14 are arranged on the same plane, and the two second trigger rods 14 are arranged perpendicularly to the trigger rod 16. Of course, the auxiliary module and the second trigger rod 14 can not be arranged, and both belong to the protection range of the utility model.

[0085] Preferably, when the iron core 32 is at the first position, the tripping device 2 is arranged above the traction rod 65 in the height direction of the circuit breaker, and when the iron core 32 moves from the first position to the third position, the tripping device 2 pushes the traction rod 65 downward in the height direction of the circuit breaker.

[0086] Preferably, the moving direction of the tripping device 2 is parallel to the height direction of the circuit breaker.

[0087] It should be noted that in the description of the present application, the terms "upper", "lower", "left", "right", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings or the orientation or positional relationship commonly used in use, and are only for the convenience of description, and do not indicate that the device or element referred to must have a particular orientation, so it cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third" and the like are only used for differentiation in description, and cannot be understood as indicating relative importance.

[0088] The above is a further detailed description of the present application in combination with specific preferred embodiments, and cannot be considered as limiting the specific implementation of the present application to these descriptions. For ordinary skilled persons in the technical field to which the present application belongs, without departing from the concept of the present application, a number of simple deductions or substitutions can be made, which should be considered as falling within the protection scope of the present application.

Claims

1. A shunt release, comprising a driving member (1) and a release (3), characterized in that: It also includes a tripping member (2) for triggering the tripping of the operating mechanism of the circuit breaker and a spring (33) connected to the tripping member (2), and the driving member (1) is movable between a first driving position and a second driving position. The trip unit (3) comprises a permanent magnet (30), a coil (31) and an iron core (32), wherein the iron core (32) is movable between a first position, a second position and a third position, wherein the second position is located between the first position and the third position. The tripping member (2) is connected to the iron core (32); the permanent magnet (30) attracts the iron core (32) so that when the iron core (32) is in the first position, the tripping member (2) is driven to compress the spring (33); the coil (31) can drive the iron core (32) to move from the first position to the second position when energized; after the iron core (32) passes the second position, the spring (33) is released, so that the spring (33) releases energy to push the tripping member (2) to trigger the operating mechanism (64) to trip and drive the iron core (32) to move to the third position; when the driving member (1) moves to the first driving position, the driving member (2) is driven to move and reset and drive the iron core (32) to move from the third position to at least the second position; the permanent magnet (30) can attract the iron core (32) in the second position, so that the iron core (32) moves to the first position and compresses the spring (33).

2. The shunt release according to claim 1, characterized in that: It also includes a micro switch (4) and a power supply circuit, wherein the micro switch (4) is connected in series between the trip unit (3) and the power supply circuit. When the driving member (1) is located at the second driving position, the micro switch (4) is turned on, so that the power supply circuit can supply power to the coil (31) of the trip unit (3) through the micro switch (4). When the driving member (1) is located at the first driving position, the micro switch (4) is disconnected, so that the micro switch (4) cuts off the power supply circuit and the coil (31) of the tripper (3).

3. The shunt release according to claim 2, characterized in that: The driving member (1) comprises a driving portion (11), a triggering portion (13) and a pushing portion (12); the triggering portion (13) is used to trigger the micro switch (4) to switch the state; the pushing portion (12) is used to push the release member (2), so that the release member (2) drives the iron core (32) to move from the third position to the second position.

4. The shunt release according to claim 1, characterized in that: The release member (2) is arranged below the iron core (32), and the moving direction of the iron core (32) and the moving direction of the release member (2) are arranged in parallel.

5. The shunt release according to claim 1, characterized in that: The driving member (1) is arranged on the side of the release member (2) perpendicular to the moving direction of the release member (2), and the moving directions of the release member (2) and the driving member (1) are arranged in parallel.

6. The shunt release according to claim 3, characterized in that: The release (3) also includes a shell and a yoke (35) arranged in the shell, a coil skeleton (36) is provided inside the yoke (35), a first sleeve (37) is provided in the middle of the coil skeleton (36), the iron core (32) is movably arranged in the first sleeve (37), the coil (31) is arranged outside the first sleeve (37), the release member (2) includes a support portion (21) and a second sleeve (22) located on the side of the support portion (21), the inner diameter of the second sleeve (22) is larger than the outer diameter of the first sleeve (37), the second sleeve (22) can be sleeved on the outside of the first sleeve (37), the two ends of the spring (33) are respectively sleeved on the outside of the first sleeve (37) and the second sleeve (22), and the spring (33) is limited between the coil skeleton (36) and the release member (2).

7. The shunt release according to claim 6, characterized in that: The iron core (32) includes a coaxially arranged suction portion (321) and a pulling portion (322), the radius of the suction portion (321) is larger than the radius of the pulling portion (322), and the end surface where the suction portion (321) and the pulling portion (322) are connected is provided with an annular limiting surface (323), the suction portion (321) is arranged in a first sleeve (37), and a circular blocking surface (371) is provided at one end of the first sleeve (37) close to the release member (2), and a pulling hole for extending the pulling portion (322) is provided in the middle of the blocking surface (371), and the pulling portion (322) is connected to the second sleeve (22), and when the coil (31) attracts the suction portion (321), the pulling portion (322) is used to drive the release member (2) to move.

8. The shunt release according to claim 7, characterized in that: It also includes a buffer spring (7) sleeved on the outside of the pulling portion (322), with two ends of the buffer spring (7) respectively contacting the suction portion (321) and the release member (2).

9. The shunt release according to claim 7, characterized in that: The iron core (32) also includes a limiting portion (324) vertically arranged with respect to the pulling portion (322), and the limiting portion (324) includes two limiting protrusions relatively arranged on both radial sides of the pulling portion (322). The second sleeve (22) is provided with a limiting hole (23) for passing through the limiting portion (324), and the shape of the limiting hole (23) matches the shape of the limiting portion (324). The second sleeve (22) is provided with two limiting grooves (24) on the side away from the coil (31), and the two limiting grooves (24) are relatively arranged on both sides of the limiting hole (23). After passing through the limiting hole (23), the limiting portion (324) can be rotated to a position offset from the limiting hole (23), and the two limiting protrusions at both ends of the limiting portion (324) are respectively inserted into the two limiting grooves (24) on both sides of the limiting hole (23) for limiting.

10. The shunt release according to claim 7, characterized in that: The tripping member (2) comprises a reset portion (25) and a tripping portion (26) arranged on both sides of the axis of the second sleeve (22), the reset portion (25) and the tripping portion (26) being respectively connected to the support portion (21), the pushing portion (12) of the driving member (1) being able to push the reset portion (25) so that the tripping member (2) drives the iron core (32) to move from the third position to the second position, and the tripping portion (26) is used to trigger the operating mechanism (64) to trip.

11. The shunt release according to claim 8, characterized in that: The housing comprises a lower shell (341) and an upper shell (342) covering the lower shell (341); the upper shell (342) is used to accommodate a release (3); the lower shell (341) is used to accommodate a release member (2); a claw (345) for limiting a yoke (35) of the release (3) is provided in the upper shell (342); a limiting column (346) is provided in the lower shell (341); the limiting column (346) is used to be inserted into the yoke (35) of the limit release (3) in the upper shell (342).

12. The shunt release according to claim 11, characterized in that: The top side of the upper shell (342) is provided with a wiring hole (3422) and a rib (3423), the wiring hole (3422) is used to pass the wire (5), the rib (3423) protrudes inward, the bottom of the rib (3423) is used to limit the release (3), and the side of the rib (3423) is used to limit the wire (5), the two ends of the coil (31) are respectively connected in series with the micro switch (4) through two wires (5), and the wire (5) extends from the wiring hole (3422) to the top of the shell.

13. The shunt release according to claim 12, characterized in that: The outer side of the upper shell (342) is provided with a mounting post (347) for limiting the micro switch (4), and the micro switch (4) is provided with a mounting hole for being sleeved on the mounting post (347) to limit the position. The lower shell (341) is provided with a baffle (348), and the micro switch (4) is located between the baffle (348) and the upper shell (342) after the upper shell (342) and the lower shell (341) are assembled.

14. The shunt release according to claim 3, characterized in that: The pushing portion (12) of the driving member (1) is plate-shaped, and the driving portion (11) and the triggering portion (13) are respectively protrudingly arranged on two opposite side surfaces of the pushing portion (12).

15. A circuit breaker, characterized in that: It comprises a shunt release as described in any one of claims 1 to 14, and at least two phase pole units arranged side by side, wherein an operating mechanism (64) is provided above one of the phase pole units, and the release (3) is arranged above the other phase pole unit, and each phase pole unit is respectively provided with a moving contact and a static contact, when the moving contact contacts the static contact, the driving member is located in the second driving position, and when the moving contact is separated from the static contact, the driving member is located in the first driving position.

16. The circuit breaker according to claim 15, wherein: An auxiliary module is provided above the driving member (1) and on the side of the tripper (3); the auxiliary module includes a micro switch; and a second trigger rod (14) for triggering the auxiliary module is provided on the driving member (1).

17. The circuit breaker according to claim 15, wherein: The driving member (1) is provided with two second trigger rods (14), and two auxiliary modules are correspondingly provided above the driving member (1). The two second trigger rods (14) are provided on the same plane, and the two second trigger rods (14) are both provided perpendicularly to the trigger rod (16).

18. The circuit breaker according to claim 15, wherein: When the iron core (32) is in the first position, the tripping member (2) is arranged above the traction rod (65) along the height direction of the circuit breaker; when the iron core (32) moves from the first position to the third position, the tripping member (2) pushes the traction rod (65) downward along the height direction of the circuit breaker.

19. The circuit breaker according to claim 15, wherein: The moving direction of the tripping member (2) is arranged parallel to the height direction of the circuit breaker.

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