Circuit breaker

Abstract

A circuit breaker comprises a shell, a plurality of phase pole units arranged side by side are arranged in the shell, each phase pole unit comprises a moving contact, a static contact, an arc extinguishing mechanism, an operating mechanism, a hand-operating mechanism, a magnetic control mechanism and a protection mechanism, and the moving contact is connected with a rotating shaft mechanism. The operating mechanism of each phase pole unit drives the moving contact and the static contact to be contacted and separated through the respective rotating shaft mechanism; the hand-operating mechanism and the magnetic control mechanism are respectively connected with the operating mechanism, the magnetic control mechanism can drive the rotating shaft mechanism to rotate through the operating mechanism, so that the rotating shaft mechanism drives the moving contact to be in contact with the static contact, and the hand-operating mechanism can drive the rotating shaft mechanism to rotate through the operating mechanism, so that the rotating shaft mechanism drives the moving contact to be in contact with or separated from the static contact. And the protection mechanism is used for triggering the operation mechanism to release when a circuit fault occurs, so that the operation mechanism drives the moving contact to be separated from the static contact through the rotating shaft mechanism, and each phase pole can realize independent manual switching-on and switching-off control and independent remote switching-on control.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of low-voltage apparatus, specifically relates to a circuit breaker. BACKGROUND

[0002] In order to improve the power satisfaction of resident user, reduce the power failure range in meter box, there is a three-phase independent breaking measurement switch (i.e. molded case circuit breaker) in the market at present, which controls the connection and breaking of each main circuit by setting an independent spring type operating mechanism for each of A / B / C three-phase, and realizes the separate breaking of a phase when a fault occurs in the main circuit of the phase. If it is needed to realize the intelligent and unmanned operation of the three-phase independent breaking measurement switch in the meter box, and realize the remote control of the closing and opening, the traditional way is to externally set an electric operating mechanism above the measurement switch, due to the limitation of the structure space size, only one electric operating mechanism can drive the handle of each operating mechanism of A / B / C three-phase to drive the closing and opening of the operating mechanism, so that the closing and opening of A / B / C three-phase can be realized at the same time, and the independent control of the closing and opening of A / B / C three-phase cannot be realized; or the independent control of the closing and opening of A / B / C three-phase can be realized, but the size of the measurement switch and the externally set electric operating mechanism is relatively large, which cannot meet the installation and use in the existing meter box.

[0003] In addition, the tripping form of the traditional three-phase independent breaking measurement switch is an electronic tripping device, and the tripping function is realized by the measurement unit, power module and magnetic flux tripping device in the measurement switch, the electronic components and magnetic flux tripping device components involved are greatly affected by the "three high" environment of "high altitude", "high temperature" and "high humidity", and with the increase of use time, the measurement unit, power module and magnetic flux tripping device may fail, so that the measurement switch cannot trip when overload and short circuit faults occur in the line, thereby bringing risks in use. CONTENT OF THE UTILITY MODEL

[0004] The utility model aims at overcoming at least one defect of the prior art, and provides a circuit breaker.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0006] A circuit breaker, comprising a shell, a plurality of phase pole units arranged side by side are arranged in the shell, each phase pole unit comprises a moving contact, a stationary contact, an arc extinguishing mechanism, an operating mechanism, a manual mechanism, a magnetic control mechanism and a protection mechanism, the moving contact is connected with a rotating shaft mechanism, and the operating mechanism of each phase pole unit drives the moving contact and the stationary contact to contact and separate respectively through the rotating shaft mechanism of each phase pole unit;

[0007] The manual mechanism and the magnetic control mechanism are connected with the operating mechanism respectively,

[0008] The magnetic control mechanism can drive the rotating shaft mechanism to rotate through the operating mechanism, so that the rotating shaft mechanism drives the movable contact and the static contact to contact. The manual mechanism can drive the rotating shaft mechanism to rotate through the operating mechanism, so that the rotating shaft mechanism drives the movable contact and the static contact to contact and separate. The protection mechanism is used to trigger the operating mechanism to trip when a circuit fault occurs, so that the operating mechanism drives the movable contact and the static contact to separate through the rotating shaft mechanism.

[0009] Preferably, the device further comprises a separate excitation release, which is used to remotely control the operating mechanism to trip, so that the operating mechanism drives the movable contact and the static contact to separate through the rotating shaft mechanism.

[0010] Preferably, the device further comprises a measuring unit, a comprehensive protection unit and a power module. The magnetic control mechanism and the separate excitation release are connected with the comprehensive protection unit. The comprehensive protection unit is connected with the measuring unit. The power module is connected with the measuring unit and the comprehensive protection unit to supply power for the measuring unit and the comprehensive protection unit. The measuring unit is used to collect current and / or voltage signals of each phase pole unit. The comprehensive protection unit judges whether a fault occurs according to the current and / or voltage signals collected by the measuring unit, and controls the separate excitation release to trigger the operating mechanism to trip when a fault occurs. The comprehensive protection unit can control the magnetic control mechanism to drive the operating mechanism to act, so that the operating mechanism drives the movable contact and the static contact to contact through the rotating shaft mechanism.

[0011] Preferably, the housing is provided with three phase pole units and an N pole unit arranged side by side on the side surface of the three phase pole units. The power module is arranged above the N pole unit and on the side surface of the magnetic control mechanism of the three phase pole units. The housing is further provided with the measuring unit and the comprehensive protection unit. The measuring unit and the comprehensive protection unit are arranged side by side at one end of the N pole unit away from the power module and at one end of the three phase pole units away from the magnetic control mechanism.

[0012] Preferably, the operating mechanism comprises a driving rod, a locking mechanism and an unlocking mechanism. The driving rod is connected with the rotating shaft mechanism. The energy storage mechanism is connected with the driving rod. The driving rod can move between the closed position and the open position. When the driving rod moves to the closed position, the driving rod is locked in the closed position by the locking mechanism and the energy storage mechanism is locked in the energy storage state. The unlocking mechanism is configured to drive the locking mechanism to release the locking of the driving rod so that the energy storage mechanism releases energy. When the energy storage mechanism releases energy, the driving rod moves to the open position. When the driving rod moves to the open position, the driving rod drives the rotating shaft mechanism to drive the movable contact and the static contact to separate.

[0013] The magnetic control mechanism comprises a moving iron core for driving the driving rod to move. The magnetic control mechanism drives the driving rod to move from the open position to the closed position through the moving iron core. The manual mechanism comprises a closing handle connected with the driving rod. The closing handle can drive the driving rod to move from the open position to the closed position.

[0014] Preferably, the manual mechanism comprises a tripping button configured to drive the unlocking mechanism to release the locking mechanism from locking the drive rod; and the circuit breaker further comprises a trip-free release configured to drive the unlocking mechanism to release the locking mechanism from locking the drive rod.

[0015] Preferably, the operating mechanism comprises a bracket, the locking mechanism comprises a stop shaft, a locking member and a locking spring, and the unlocking mechanism comprises an unlocking member, the stop shaft, the locking member and the unlocking member are respectively mounted on the bracket.

[0016] The stop shaft is eccentrically arranged with the stop mounting shaft, and the stop shaft can move between the locking position and the unlocking position by circumferential movement of the stop mounting shaft, the stop shaft blocks the drive rod from moving from the closed position to the open position when the stop shaft is in the locking position, and the drive rod can move from the closed position to the open position when the stop shaft is in the unlocking position.

[0017] The locking spring is connected with the locking member, for driving the locking member to push the stop shaft to move to the locking position and limit the stop shaft in the locking position, the unlocking member can be moved by external force to drive the locking member to release the stop shaft from the limit, and the stop shaft can move to the unlocking position.

[0018] Preferably, the rotation center of the stop shaft and the rotation center of the locking member are arranged in parallel, the unlocking member is arranged rotatably, the rotation center of the unlocking member is perpendicular to the rotation center of the locking member, and the unlocking member is located between the rotation center of the locking member and the stop shaft.

[0019] Preferably, the bracket is provided with an unlocking hole for passing through the unlocking member, the unlocking member passes through the bracket from the unlocking hole, the middle part of the unlocking member is located in the bracket and cooperates with the locking member, and the two ends of the unlocking member are located on the two sides of the bracket, and the manual mechanism and the protection mechanism are respectively arranged on the two sides of the bracket and cooperate with the two ends of the unlocking member.

[0020] Preferably, the unlocking member comprises an unlocking rod and an unlocking rotating part rotatably connected with the bracket, the unlocking rod comprises an unlocking section and first and second trigger sections oppositely arranged on the two sides of the unlocking section, the second trigger section is provided with a bent section cooperating with the manual mechanism, the manual mechanism is provided with a tripping button, the tripping button can push the bent section to drive the unlocking rod to rotate, so that the unlocking section pushes the locking member to unlock the stop shaft, and the protection mechanism can push the first trigger section to drive the unlocking rod to rotate, so that the unlocking section pushes the locking member to unlock the stop shaft.

[0021] Preferably, the trip-free release is further arranged to cooperate with the first trigger section, and the trip-free release can push the first trigger section of the unlocking member to drive the unlocking section of the unlocking member to unlock the stop shaft.

[0022] Preferably, the unlocking lever is linear, and the angle between the unlocking lever and the height direction of the circuit breaker is 0-20 degrees.

[0023] Preferably, the locking member comprises a locking rotating part rotatably connected with the bracket, and a locking part protruding radially from the locking rotating part, and the end face of the locking part away from the locking rotating part is provided with a locking surface, the bracket is provided with a locking limiting part, and a locking spring is connected between the bracket and the locking member, the locking spring drives the locking member to rotate to the state that the locking part is in contact with the locking limiting part and the locking part pushes the stop shaft to move from the unlocking position to the locking position, and the locking surface abuts against the stop shaft to prevent the stop shaft from moving from the locking position to the unlocking position.

[0024] Preferably, the bracket comprises oppositely arranged bottom plate and top plate, the stop shaft, the locking member and the driving rod are respectively arranged between the bottom plate and the top plate, the bottom plate and the top plate are respectively provided with an unlocking hole for the unlocking member to pass through, the bottom plate and the top plate are provided with a fixedly connected locking fixed shaft therebetween, the locking member is rotatably arranged on the locking fixed shaft, the bottom plate and the top plate are respectively provided with a circular-arc-shaped sliding groove, the two ends of the stop shaft are respectively inserted into the sliding grooves for sliding fit, and the stop mounting shaft is rotatably mounted on the bottom plate and the top plate, and the stop shaft is connected with the stop mounting shaft through the stop connecting rod to rotate around the stop mounting shaft.

[0025] Preferably, the magnetic control mechanism comprises a coil former, a static iron core and a dynamic iron core arranged in the coil former, a coil arranged outside the coil former for driving the static iron core and the dynamic iron core to attract, a magnetic control spring arranged between the dynamic iron core and the static iron core, and the dynamic iron core is connected with the driving rod, and the magnetic control spring serves as the energy storage mechanism.

[0026] Preferably, the manual mechanism comprises a push plate movably arranged on the bracket, and the closing handle can drive the driving rod to move from the opening position to the closing position through the push plate.

[0027] Preferably, the bracket is provided with a guide groove, and the push plate is provided with a guide shaft inserted into the guide groove for sliding fit.

[0028] Preferably, the push plate is provided with two pushing parts, the driving rod is provided with a transmission shaft, the two pushing parts are oppositely arranged on the two sides of the driving rod, and the two pushing parts are respectively used for pushing the two ends of the transmission shaft to drive the transmission shaft to drive the driving rod to move from the opening position to the closing position, and the reset spring is connected with the push plate to drive the push plate to reset.

[0029] Preferably, the rotating shaft mechanism comprises a contact support rotatably arranged, the driving rod is provided with a transmission shaft, the two ends of the transmission shaft are respectively rotatably connected with two connecting rods, and the two connecting rods are rotatably connected with the contact support.

[0030] Preferably, each phase pole unit is respectively provided with a rotatingly arranged traction rod, the traction rod comprises a driving part matched with the protection mechanism, and a trigger part matched with the unlocking part of the operating mechanism, the protection mechanism comprises a bimetallic strip and an armature, the bimetallic strip and the armature respectively push the driving part when the overload current and the short-circuit current meet the threshold value, so that the traction rod rotates and pushes the unlocking part through the trigger part, and the locking part is unlocked through the unlocking part to stop the shaft.

[0031] Preferably, a plurality of phase pole units are arranged side by side along the width direction of the circuit breaker, the operating mechanism of each phase pole unit is provided with a magnetic control mechanism on one side along the length direction of the circuit breaker, the operating mechanism is provided with a manual mechanism and a protection mechanism on two sides along the height direction of the circuit breaker respectively, the moving contact, the rotating shaft mechanism, the static contact and the arc extinguishing mechanism of each phase pole unit are arranged below the corresponding magnetic control mechanism along the height direction of the circuit breaker, and the traction rod and the split excitation release are arranged between the protection mechanism and the operating mechanism.

[0032] Preferably, the shell comprises a base and a middle cover, the middle cover is arranged above the base, the base is provided with a first base part and a second base part along the length direction of the width of the circuit breaker, the first base part is provided with a plurality of base phase pole grooves along the width direction of the circuit breaker, the arc extinguishing mechanism, the rotating shaft mechanism, the moving contact, the static contact, the protection mechanism, the first current sensor and the two wiring terminals of each phase pole unit are arranged in the corresponding base phase pole groove, and the second mutual inductor is arranged in the second base part and crosses the corresponding plurality of base phase pole grooves; the middle cover is provided with a first middle cover part and a second middle cover part along the length direction of the width of the circuit breaker, the first middle cover part is provided with a plurality of middle cover phase pole grooves along the width direction of the circuit breaker, the operating mechanism, the magnetic control mechanism and the split excitation release of each phase pole unit are arranged in the corresponding middle cover phase pole groove, and the measurement unit and the comprehensive protection unit are arranged side by side in the second middle cover part along the width direction of the circuit breaker and cross the corresponding plurality of middle cover phase pole grooves.

[0033] Preferably, the circuit breaker further comprises an N-pole unit, the N-pole unit is arranged in the corresponding base phase pole groove, and the power supply module is arranged in the middle cover phase pole groove corresponding to the N-pole unit.

[0034] The circuit breaker of the utility model discloses each phase pole unit is provided with a manual mechanism, a magnetic control mechanism and an operating mechanism, each phase pole can realize independent manual switching control and independent remote switching control; the magnetic control mechanism is relative to the operating mechanism of the motor, small in size and simple in structure.

[0035] In addition, the operating mechanism drives the rotating shaft mechanism to realize the switching of the circuit breaker through the driving rod arranged in a straight line, the driving rod is locked at the closing position through the locking mechanism, the driving rod and the energy storage mechanism are released through the unlocking mechanism, the energy storage mechanism drives the driving rod to realize the quick opening, and the switching can quickly act to reduce the arc burning of the moving contact and the static contact.

[0036] In addition, the magnetic control spring can not only reset the magnetic control mechanism, but also serve as an energy storage mechanism of the operating mechanism, thereby reducing parts.

[0037] In addition, the rotation center of the unlocking member is axially perpendicular to the rotation center of the locking member, and the unlocking member is located between the rotation center of the locking member and the stop shaft, so that the internal space of the operating mechanism can be effectively utilized, the unlocking member can be arranged along the height direction of the circuit breaker, and the manual mechanism, the protection mechanism and the separate excitation release can be matched, the layout of the components is facilitated, the structure is compact and small in size, and each phase pole unit can be integrated with an independent operating mechanism.

[0038] In addition, the multi-phase independent magnetic control measuring switch has independent manual on-off control and independent remote on-off control for each phase pole unit, and has reasonable overall layout and small size. BRIEF DESCRIPTION OF DRAWINGS

[0039] Figure 1 is a structural schematic view of the circuit breaker of the utility model;

[0040] Figure 2 is a structural schematic view of the inside of the cover of the utility model;

[0041] Figure 3 is a structural schematic view of the inside of the base of the utility model;

[0042] Figure 4 is a sectional view of the circuit breaker of the utility model;

[0043] Figure 5 is a structural schematic view of the operating mechanism of the utility model;

[0044] Figure 6 is a structural schematic view of the operating mechanism when the operating mechanism is closed;

[0045] Figure 7 is a structural schematic view of the operating mechanism when the operating mechanism is opened;

[0046] Figure 8 is a structural schematic view when the stop shaft is located at the locking position and the driving rod is located at the closing position;

[0047] Figure 9 is a structural schematic view when the stop shaft is located at the unlocking position and the driving rod is located at the opening position;

[0048] Figure 10 is a structural schematic view of the unlocking member of the utility model;

[0049] Figure 11 is the structure diagram of the locking piece of the utility model;

[0050] Figure 12 is the structure diagram of the bottom plate of the utility model;

[0051] Figure 13 is the structure diagram of the top plate of the utility model;

[0052] Figure 14 is the structure diagram of the support of the utility model;

[0053] Figure 15 is the structure diagram of the traction rod of the utility model;

[0054] Figure 16 is the structure diagram of the protection mechanism of the utility model;

[0055] In the figure:

[0056] 1 shell 71 drive part

[0057] 2 magnetic control mechanism 72 trigger part

[0058] 3 operation mechanism 120 baffle

[0059] 4 manual mechanism 311 stopper mounting shaft

[0060] 5 protection mechanism 312 stopper connecting rod

[0061] 6 rotating shaft mechanism 321 locking rotating part

[0062] 7 traction rod 322 locking part

[0063] 10 second mutual inductor 323 locking spring

[0064] 11 base 324 locking surface

[0065] 12 middle cover 325 pushing surface

[0066] 13 measurement unit 326 locking fixed shaft

[0067] 14 integrated protection unit 331 unlocking rod

[0068] 15 power module 332 unlocking section

[0069] 16 phase pole unit 333 first trigger section

[0070] 17 N pole unit 334 second trigger section

[0071] 18 movable contact 335 first bending section

[0072] 19 static contact 336 unlock rotation part

[0073] 21 coil skeleton 337 split excitation release

[0074] 22 static core 340 transmission shaft

[0075] 23 moving core 350 support shaft

[0076] 24 magnetic control spring 351 unlock hole

[0077] 31 stop shaft 352 bottom plate

[0078] 32 locking part 353 top plate

[0079] 33 unlocking part 354 locking limiting part

[0080] 34 drive rod 355 side plate

[0081] 35 bracket 356 guide plate

[0082] 41 closing handle 357 sliding groove

[0083] 42 opening button 358 unlock avoidance notch

[0084] 43 push plate 431 first guide shaft

[0085] 51 bimetallic strip 432 second guide shaft

[0086] 52 armature 433 push part

[0087] 53 first mutual inductor 434 reset spring

[0088] 61 contact support 3591 first guide groove

[0089] 62 connecting rod 3592 second guide groove DETAILED DESCRIPTION

[0090] The specific embodiments of the circuit breaker of the utility model are further illustrated by the following examples combined with the drawings. The circuit breaker of the utility model is not limited to the description of the following examples.

[0091] As Figures 1-4As shown, the circuit breaker of the embodiment comprises a shell 1 composed of a base 11, a middle cover 12 and a cover plate, a plurality of phase pole units 16 are arranged side by side in the shell 1, and a phase spacing plate is arranged in the shell 1 to separate the phase pole units 16. The plurality of phase pole units 16 are arranged side by side along the width direction of the circuit breaker. The circuit breaker of the embodiment further comprises a measurement unit 13, a comprehensive protection unit 14 and a power module 15 arranged in the shell 1. The circuit breaker of the embodiment comprises three phase pole units 16, and one N pole unit 17 arranged side by side on the side surface of the three phase pole units 16. The three phase pole units 16 are P pole units, and the three phase pole units 16 and the N pole unit 17 are arranged side by side along the width direction of the circuit breaker.

[0092] An improvement of the embodiment is that each phase pole unit 16 comprises a moving contact 18, a stationary contact 19, an arc extinguishing mechanism, a rotating shaft mechanism 6, an operating mechanism 3, a manual mechanism 4, a magnetic control mechanism 2 and a protection mechanism 5. The moving contact 18 is connected with the rotating shaft mechanism 6. The manual mechanism 4 and the magnetic control mechanism 2 are respectively connected with the operating mechanism 3. The magnetic control mechanism 2 can drive the rotating shaft mechanism 6 to rotate through the operating mechanism 3, so that the rotating shaft mechanism 6 drives the moving contact 18 to contact with the stationary contact 19. The manual mechanism 4 can drive the rotating shaft mechanism 6 to rotate through the operating mechanism 3, so that the rotating shaft mechanism 6 drives the moving contact 18 to contact with and separate from the stationary contact 19. The protection mechanism 5 is used to trigger the operating mechanism 3 to trip when a circuit fault occurs, so that the operating mechanism 3 drives the moving contact 18 to separate from the stationary contact 19 through the rotating shaft mechanism 6. For example, the protection mechanism 5 can trigger the operating mechanism 3 to trip when an overload and / or a short circuit occurs.

[0093] Each phase pole unit 16 of the circuit breaker of the embodiment is provided with the manual mechanism 4, the magnetic control mechanism 2 and the operating mechanism 3. Each phase pole unit 16 can realize independent manual on-off control and independent remote on control. The magnetic control mechanism 2 is relatively small in size and simple in structure relative to the operating mechanism of the motor.

[0094] Preferably, the circuit breaker of the embodiment further comprises a separate excitation tripper 337. The separate excitation tripper 337 is used to remotely control the operating mechanism 3 to trip, so that the operating mechanism 3 drives the moving contact 18 to separate from the stationary contact 19 through the rotating shaft mechanism 6. In this way, the function of remote electric on-off can be realized. The separate excitation tripper 337 of the embodiment adopts the prior art, which is generally an electromagnetic tripper including an on-off coil and a tripper, and will not be described herein.

[0095] The N pole unit 17 of the circuit breaker of the embodiment can be a direct connection N pole unit without a breakpoint, or can be provided with a breakpoint, i.e. an N pole unit 17 comprising a moving contact and a stationary contact. The N pole unit 17 can be selectively provided with or not provided with the protection mechanism 5.

[0096] The protection mechanism 5 of the circuit breaker in this embodiment is a thermal magnetic protection mechanism, which provides overload and short-circuit protection, and triggers the operating mechanism 3 to trip when overload or short circuit occurs. Of course, the protection mechanism 5 can also provide only overload or short-circuit protection.

[0097] The N-pole unit 17 in this embodiment is provided with a power module 15, which is arranged side by side on the side of the magnetic control mechanism 2 of the three-phase pole units 16. The housing 1 is also provided with a measurement unit 13 and a comprehensive protection unit 14, which are arranged at the end of the N-pole unit 17 away from the power module 15 and at the end of the three-phase pole units 16 away from the magnetic control mechanism 2. The power module 15 is connected with the measurement unit 13 and the comprehensive protection unit 14, and is used to supply power to the measurement unit 13, the comprehensive protection unit 14 and other mechanisms in the circuit breaker. The magnetic control mechanism 2 and the separate excitation tripping device 337 are respectively connected with the comprehensive protection unit 14, which is connected with the measurement unit 13. The measurement unit 13 is used to collect current and / or voltage signals of each phase pole unit 16. The comprehensive protection unit 14 judges whether a fault occurs according to the current and / or voltage signals collected by the measurement unit 13, and controls the separate excitation tripping device 337 to trigger the operating mechanism 3 to trip when a fault occurs, so that the operating mechanism 3 drives the moving contact 18 to separate from the static contact 19 through the rotating shaft mechanism 6. The comprehensive protection unit 14 can also perform remote communication, and can control the magnetic control mechanism 2 to drive the operating mechanism 3 to act under the control of a remote signal, so that the operating mechanism 3 drives the moving contact 18 to contact the static contact 19 through the rotating shaft mechanism 6. The comprehensive protection unit 14 can control the separate excitation tripping device 337 to trigger the operating mechanism 3 to trip to realize electrically operated opening under the control of a remote signal. This embodiment is a three-phase independent magnetic control measurement switch. As other embodiments, the measurement unit 13, the comprehensive protection unit 14 and the power module 15 can not be arranged, so that the controller or the upper computer can be directly connected with the magnetic control mechanism 2 and / or the separate excitation tripping device 337 without the comprehensive protection unit 14. It should be noted that the number of phase pole units 16 can also be adjusted, such as two phase pole units 16 or four phase pole units 16 or more phase pole units 16, which all belong to the protection scope of the present application.

[0098] As Figures 4-5, 8-9, the operating mechanism 3 includes a drive rod 34, a locking mechanism and an unlocking mechanism, the drive rod 34 is connected with the rotating shaft mechanism 6, the energy storage mechanism is connected with the drive rod 34, the drive rod 34 can move between the closed position and the open position, when the drive rod 34 moves to the closed position, the drive rod 34 drives the rotating shaft mechanism 6 to drive the moving contact 18 to contact with the static contact 19, at the same time, the drive rod 34 is locked in the closed position by the locking mechanism and the energy storage mechanism is locked in the energy storage state; the unlocking mechanism is configured to drive the locking mechanism to release the locking of the drive rod 34 to release the energy of the energy storage mechanism, when the unlocking mechanism is forced to move, it can drive the locking mechanism to move, release the locking of the drive rod 34, and make the operating mechanism trip, at this time, the energy storage mechanism drives the drive rod 34 to move to the open position when releasing the energy, and the drive rod 34 drives the rotating shaft mechanism 6 to drive the moving contact 18 to separate from the static contact 19 when moving to the open position.

[0099] The magnetic control mechanism 2 of the embodiment includes a moving iron core 23 connected with the drive rod 34, the magnetic control mechanism 2 drives the drive rod 34 to move from the open position to the closed position through the moving iron core 23; the manual mechanism 4 includes a closing handle 41 for driving the drive rod 34 to move, the closing handle 41 can drive the drive rod 34 to move from the open position to the closed position. The manual mechanism 4 includes an opening button 42, the opening button 42 is configured to drive the unlocking mechanism to drive the locking mechanism to release the locking of the drive rod 34, so that the operating mechanism trips; the circuit breaker further includes a separate release trip 337, the separate release trip 337 is configured to drive the unlocking mechanism to drive the locking mechanism to release the locking of the drive rod 34, so that the operating mechanism trips. When the fault current meets the action threshold, the protection mechanism 5 can drive the unlocking mechanism to drive the locking mechanism to release the locking of the drive rod 34, so that the operating mechanism trips.

[0100] As other embodiments, the manual mechanism 4 can also not be provided with the opening button 42, and the closing handle 41 is used for opening operation, when the closing handle 41 moves to the opening direction, it pushes the unlocking mechanism to drive the locking mechanism to release the locking of the drive rod 34, so that the operating mechanism trips. For example, another embodiment is that the closing handle 41 moves linearly, when it moves to the closing direction, it drives the drive rod 34 to move from the open position to the closed position, when opening, the closing handle 41 is rotated, the closing handle 41 directly or indirectly drives the unlocking mechanism through other connecting rods, so that the operating mechanism trips; or the closing handle 41 moves linearly to other directions, directly or indirectly drives the unlocking mechanism through other connecting rods, which is also possible.

[0101] As Figures 4-9As shown, one specific embodiment of the operating mechanism in the embodiment is shown, the operating mechanism 3 includes a support 35, the locking mechanism includes a stop shaft 31, a locking piece 32 and a locking spring 323, the unlocking mechanism includes an unlocking piece 33, the driving rod 34, the stop shaft 31, the locking piece 32 and the unlocking piece 33 are respectively installed on the support 35; the driving rod 34 is linearly movably arranged, the stop shaft 31 is eccentrically arranged with a stop mounting shaft 311, the stop shaft 31 can move between the locking position and the unlocking position by the circular motion around the stop mounting shaft 311, when the stop shaft 31 is located at the locking position, the stop shaft 31 can block the driving rod 34 from moving from the closed position to the open position, when the stop shaft 31 is located at the unlocking position, the stop shaft 31 avoids the driving rod 34, so that the driving rod 34 can move from the closed position to the open position;

[0102] The locking spring 323 is connected with the locking piece 32, for driving the locking piece 32 to push the stop shaft 31 to move to the locking position and limit the stop shaft 31 at the locking position, that is, simultaneously block the stop shaft 31 from moving from the locking position to the unlocking position, the unlocking piece 33 is moved by external force and can drive the locking piece 32 to release the limitation of the stop shaft 31, so that the stop shaft 31 can move to the unlocking position, the driving rod 34 releases the energy storage mechanism, and the energy storage mechanism drives the driving rod 34 to move to the open position when releasing energy. The stop shaft 31 can be provided with a stop shaft 31 return spring, which is automatically moved from the locking position to the unlocking position under the driving of the return spring, or the energy storage mechanism drives the stop shaft 31 to move to the open position when driving the driving rod 34 to move to the open position. The unlocking piece 33 is rotatably arranged, which can also be linearly slidably arranged, and can also be integrally formed with the locking piece 32.

[0103] As shown, Figure 9 At this time, the driving rod 34 is located at the open position, the magnetic control mechanism 2 is energized and attracted, the moving iron core 23 drives the driving rod 34 to move to the closed position shown in Figure 8 , the driving rod 34 drives the rotating shaft mechanism 6 to close the circuit breaker, the locking spring 323 drives the locking piece 32 to rotate and push the stop shaft 31 to rotate to the locking position, the locking part 322 of the locking piece 32 abuts against the stop shaft 31 and limits the stop shaft 31, the stop shaft 31 blocks the end of the driving rod 34, so that the driving rod 34 cannot move to the open position. When opening, the unlocking piece 33 drives the locking piece 32 to move away from the locking part 322 by overcoming the elastic force of the locking spring 323, so that the energy storage mechanism releases energy and pushes the driving rod 34 to move to the open position, the rotating shaft mechanism 6 drives the circuit breaker to open, and at the same time, the driving rod 34 pushes the stop shaft 31 to move from the locking position to the unlocking position, the operating mechanism is switched from the closed state of Figure 8 to the open state of Figure 9 , at this time, the stop shaft 31 abuts against the side surface of the driving rod 34.

[0104] In particular, the axial direction of the rotation center of the stop shaft 31 and the axial direction of the rotation center of the locking member 32 are arranged in parallel, the unlocking member 33 is arranged in rotation, the axial direction of the rotation center of the unlocking member 33 is perpendicular to the axial direction of the rotation center of the locking member 32, and the unlocking member 33 is located between the rotation center of the locking member 32 and the stop shaft 31. The internal space of the operating mechanism 3 can be effectively utilized, the unlocking member 33 can be arranged in the height direction of the circuit breaker, the manual mechanism 4, the protection mechanism 5 and the separate excitation release 337 can be matched, the layout of the components can be facilitated, the structure is compact and the volume is small, the independent operating mechanism 3 can be integrated in each phase pole unit 16, the electric drive mechanism does not need to be arranged outside the shell 1, the structure is compact and the volume is small.

[0105] As shown in Figure 4 The magnetic control mechanism 2 of the embodiment includes a coil framework 21, a static iron core 22 and a dynamic iron core 23 arranged in the coil framework 21, a coil arranged outside the coil framework 21 for driving the static iron core 22 and the dynamic iron core 23 to be attracted, a magnetic control spring 24 arranged between the dynamic iron core 23 and the static iron core 22, and a driving rod 34 connected with the dynamic iron core 23. The magnetic control spring 24 serves as an energy storage mechanism of the operating mechanism 3.

[0106] In the process of electric closing, the coil drives the static iron core 22 and the dynamic iron core 23 to be attracted, the dynamic iron core 23 moves close to the static iron core 22, the driving rod 34 drives the rotating shaft mechanism 6, the rotating shaft mechanism 6 drives the moving contact 18 and the static contact 19 to be in contact, the driving rod 34 is limited by the stop shaft 31 when the closing is in place, the dynamic iron core 23 is also limited at the position of being attracted to the static iron core 22, the magnetic control spring 24 is in the locked energy storage state, the stop shaft 31 releases the magnetic control spring 24 when the opening is started, and the magnetic control spring 24 drives the dynamic iron core 23 and the static iron core 22 to be separated. In the process of driving the dynamic iron core 23 and the static iron core 22 to be separated by the magnetic control spring 24, the driving rod 34 connected with the dynamic iron core 23 drives the rotating shaft mechanism to act, so that the moving contact 18 and the static contact 19 are separated. The magnetic control spring 24 not only can reset the magnetic control mechanism 2, but also can serve as the energy storage mechanism of the operating mechanism 3, drive the moving contact 18 and the static contact 19 to be separated quickly when the opening is started, and reduce the electric arc generated between the moving contact 18 and the static contact 19. It should be noted that other independent springs can also be arranged as the energy storage mechanism, and the springs are connected with the driving rod 34.

[0107] As shown in Figures 5-7The bracket 35 is provided with an unlocking hole 351 for the unlocking member 33 to pass through, the unlocking member 33 passes through the bracket 35 from the unlocking hole 351, the middle part of the unlocking member 33 is located in the bracket 35 and cooperates with the locking member 32, and the two ends of the unlocking member 33 are located on the two sides of the bracket 35 and are provided with the manual mechanism 4 and the protection mechanism 5 respectively and cooperates with the two ends of the unlocking member 33.

[0108] The bracket 35 comprises a bottom plate 352 and a top plate 353 arranged oppositely and connected by a support shaft 350, and the bottom plate 352 and the top plate 353 are respectively provided with the unlocking hole 351 Figure 12 、 13 As shown in the figure, the unlocking member 33 comprises a straight unlocking rod 331, which is arranged along the height direction of the circuit breaker, and preferably the included angle between the unlocking rod 331 and the height direction of the circuit breaker is 0-20 degrees. Figure 10

[0109] Preferably, the unlocking member 33 comprises the unlocking rod 331 and an unlocking rotating part 336 rotatably connected with the bracket 35, the unlocking rod 331 comprises an unlocking section 332 and a first trigger section 333 and a second trigger section 334 arranged oppositely on the two sides of the unlocking section 332, the unlocking section 332 is located between the bottom plate 352 and the top plate 353, the second trigger section 334 is located on the side of the top plate 353 away from the unlocking section 332, one end of the second trigger section 334 close to the manual mechanism 4 is provided with a bent section 335 cooperating with the manual mechanism 4, when the opening button 42 is pressed by external force, the bent section 335 can be pushed to drive the unlocking rod 331 to rotate, so that the unlocking section 332 pushes the locking member 32 to unlock the stop shaft 31, and the side edge of the second trigger section 334 is provided with the unlocking rotating part 336 rotatably connected with the bracket 35.

[0110] The first trigger section 333 is located on the side of the bottom plate 352 away from the unlocking section 332, and the protection mechanism 5 can push the first trigger section 333 to drive the unlocking rod 331 to rotate when the circuit fails, so that the unlocking section 332 pushes the locking member 32 to unlock the stop shaft 31.

[0111] The embodiment adopts the straight unlocking rod 331, and the included angle between the unlocking rod 331 and the height direction of the circuit breaker is set to 0-20 degrees, so that the unlocking rod 331 is arranged basically parallel to the height direction of the circuit breaker. The unlocking member not only has the characteristics of small volume, but also has the characteristics of simple structure. The unlocking rod 331 can cooperate with multiple parts to realize opening under different conditions. The unlocking rod 331 can be slightly inclined to facilitate the pressing of the opening button 42. Of course, the unlocking rod 331 can also be arranged without inclination, and it is also possible to arrange an inclined surface on the opening button 42 to drive the unlocking rod 331.

[0112] Further, as shown in the figure,​Figures 4-5 As shown, the circuit breaker further comprises a separate excitation tripping device 337 capable of moving the unlocking member 33 to the unlocking position to realize remote electric tripping. The separate excitation tripping device 337 is connected with the protection unit 14 and located between the protection mechanism 5 and the bottom plate 352. The separate excitation tripping device 337 is driven by the protection unit 14 to pull the first trigger section 333 to rotate the unlocking rod 331, so that the unlocking section 332 pushes the locking member 32 to unlock the stop shaft 31, thereby realizing the function of remote electric tripping. Of course, as other embodiments, the separate excitation tripping device 337 can also be not connected with the protection unit 14 or arranged at other positions.

[0113] As shown in the drawings, Figure 11 The locking member 32 comprises a locking rotating part 321 rotationally connected with the bracket 35 and a locking part 322 protruding radially from the locking rotating part 321, which is capable of rotating between the locking position and the unlocking position with the axis of the locking rotating part 321 as the rotation center to block the movement of the stop shaft 31 from the locking position to the unlocking position. The bottom plate 352 and the top plate 353 of the bracket 35 are provided with the locking spring 323 and the locking limiting part 354 for limiting the locking part 322. The end surface of the locking part 322 away from the locking rotating part 321 is provided with the locking surface 324. The locking spring 323 is connected between the bracket 35 and the locking member 32. The locking spring 323 drives the locking member 32 to rotate to the position where the locking part 322 contacts with the locking limiting part 354 and pushes the stop shaft 31 to move from the unlocking position to the locking position. The locking surface 324 abuts against the stop shaft 31 to block the movement of the stop shaft 31 from the locking position to the unlocking position. The locking limiting part 354 is connected with one of the bottom plate 352 and the top plate 353. In this embodiment, the locking limiting part 354 is connected with the hole wall of the unlocking hole 351 of the bottom plate 352. The locking limiting part 354 is integrally formed with the bottom plate 352 and is bent to form the locking limiting part 354. Preferably, the locking part 322 is provided with the pushing surface 325 obliquely arranged with the locking surface 324, which is used to push the stop shaft 31 to return from the unlocking position to the locking position.

[0114] As shown in the drawings, Figure 2 , 14As shown, the bracket 35 includes two oppositely arranged side plates 355, and a guide plate 356 connected between the top portions of the two side plates 355, the bottom plate 352 and the top plate 353 are respectively connected with the two side plates 355, the manual mechanism 4 includes a push plate 43 movably arranged on the bracket 35, and a closing handle 41 connected with the push plate 43, the stop shaft 31, the locking piece 32, the unlocking piece 33 and the driving rod 34 are respectively arranged between the bottom plate 352 and the top plate 353, the bottom plate 352 and the top plate 353 are provided with a fixedly connected locking fixed shaft 326, the locking piece 32 is rotationally arranged on the locking fixed shaft 326, the locking rotating portion 321 is sleeved on the locking fixed shaft 326, so that the locking piece 32 rotates about the locking fixed shaft 326 as the axis, the bottom plate 352 and the top plate 353 are respectively provided with a circular-arc-shaped sliding groove 357, the stop shaft 31 is located at the locking position, the unlocking position is located on one side of the connecting line between the axis of the stop shaft 31 and the axis of the locking rotating portion 321, the two ends of the stop shaft 31 are respectively inserted into the sliding fit of the sliding grooves 357, when the stop shaft 31 moves to the end of the sliding groove 357 away from the locking piece 32, the stop shaft 31 is located at the locking position, when the stop shaft 31 moves to the end of the sliding groove 357 close to the locking piece 32, the stop shaft 31 is located at the unlocking position, and the locking piece 32 can block the movement of the stop shaft 31 from the locking position to the unlocking position to achieve locking.

[0115] Further, the two ends of the stop shaft 31 respectively pass through the bottom plate 352 and the top plate 353 from the sliding grooves 357, the stop mounting shaft 311 is rotationally mounted on the bottom plate 352 and the top plate 353, and the stop shaft 31 is connected with the stop mounting shaft 311 through the stop connecting rod 312 to rotate about the stop mounting shaft 311 as the center. In this embodiment, the stop mounting shaft 311 is arranged outside the bottom plate 352 and the top plate 353, and the stop connecting rod 312 is connected between the stop mounting shaft 311 and the end of the stop shaft 31, and the stop shaft 31 rotates about the stop mounting shaft 311 as the center through the stop connecting rod 312.

[0116] Further, the guide plate 356 of the bracket 35 is integrally formed with one of the side plates 355, the side edge of the bracket 35 away from the side plate 355 is fixedly connected with the other side edge, the guide plate 356 is provided with an unlocking avoiding gap 358 and a guide groove, the unlocking avoiding gap 358 is used for avoiding the unlocking piece 33, and the push plate 43 is provided with a guide shaft which is inserted into the guide groove in sliding fit to guide the push plate 43.

[0117] As Figure 14As shown, preferably, the guide plate 356 has a first guide groove 3591 and a second guide groove 3592 as guide grooves. The first guide groove 3591 and the second guide groove 3592 are arranged in parallel. The length of the first guide groove 3591 is less than that of the second guide groove 3592. The second guide groove 3592 is located on the side of the first guide groove 3591 and the unlocking clearance notch 358. The push plate 43 has a first guide shaft 431 that slides with the first guide groove 3591 and two second guide shafts 432 that slide with the second guide groove 3592. One of the second guide shafts 432 is connected to the closing handle 41, and the closing handle 41 drives the push plate 43 to move through the second guide shaft 432. The two second guide shafts 432 not only prevent the push plate 43 from rotating in the circumferential direction, but one of the second guide shafts 432 can also connect the closing handle 41.

[0118] like Figure 14 As shown, preferably, the push plate 43 is provided with two pushing parts 433, which are arranged opposite to each other on both sides of the drive rod 34. One of the pushing parts 433 extends to the side of the bottom plate 352 away from the top plate 353. A reset spring 434 connected to the pushing part 433 is provided on the side of the bottom plate 352 away from the top plate 353. The reset spring 434 is used to drive the push plate 43 to reset.

[0119] Furthermore, the rotating shaft mechanism 6 includes a rotatably mounted contact support 61, and a movable contact 18 is rotatably mounted on the contact support 61. The movable contact 18 and the contact support 61 are connected by a contact spring. The drive rod 34 is connected to the contact support 61 via a connecting rod 62 to drive the contact support 61 to rotate. The drive rod 34 is provided with a transmission shaft 340, with its two ends positioned opposite each other on both sides of the drive rod 34 and rotatably connected to two connecting rods 62 respectively. The two connecting rods 62 are rotatably connected to the contact support 61. The push plate 43 of the manual mechanism 4 is provided with a pushing part 433 for pushing the rotating shaft mechanism 6. When the drive rod 34 moves, it drives the connecting rods 62 to rotate via the transmission shaft 340. When the connecting rods 62 rotate, they drive the movable contact 18 to contact and separate from the stationary contact 19 via the contact support 61. When the movable contact 18 contacts the stationary contact 19, the contact spring is used to drive the movable contact 18 to press against the stationary contact 19. Preferably, the connecting rod 62 is curved, and the middle part of the connecting rod 62 bends away from the magnetic control mechanism 2, so that the middle part of the connecting rod 62 avoids the magnetic control mechanism 2.

[0120] like Figures 2-4, 6-7, a plurality of phase pole units 16 are arranged side by side along the width direction of the circuit breaker, the operating mechanism 3 is provided with the magnetic control mechanism 2 on one side along the length direction of the circuit breaker, the operating mechanism 3 is provided with the manual mechanism 4 and the protection mechanism 5 on two sides along the height direction of the circuit breaker respectively, the moving contact 18, the rotating shaft mechanism 6, the static contact 19 and the arc extinguishing mechanism of each phase pole unit 16 are arranged below the corresponding magnetic control mechanism 2 along the height direction of the circuit breaker. The traction rod 7 and the split excitation release 337 are arranged between the protection mechanism 5 and the operating mechanism 3, the protection mechanism 5 is provided with the rotating shaft mechanism 6 and the first current sensor 53 on two sides along the length direction of the circuit breaker respectively, and the rotating shaft mechanism 6 is located on one side along the height direction of the circuit breaker of the magnetic control mechanism 2, and the connecting rod 62 is inserted between the magnetic control mechanism 2 and the operating mechanism 3 and connected with the driving rod 34.

[0121] As shown in Figures 8-9 , each phase pole unit 16 is provided with a rotatable traction rod 7, the traction rod 7 includes a driving part 71 matched with the protection mechanism 5 and a trigger part 72 matched with the unlocking part 33 of the operating mechanism 3, the protection mechanism 5 of the embodiment is a thermal magnetic protection mechanism, the protection mechanism 5 includes a bimetallic strip 51 and an armature 52, the bimetallic strip 51 and the armature 52 respectively push the driving part 71 when the overload current and the short-circuit current meet the threshold value, so that the traction rod 7 rotates and pushes the unlocking part 33 through the trigger part 72, and the locking part 32 is unlocked to stop the shaft 31 through the unlocking part 33. Each phase pole unit 16 further includes a first current sensor 53 for collecting the current signal of each phase pole unit 16, the first current sensor 53 is connected with the measuring unit 13 for collecting the signal of the main circuit of each phase pole unit 16, and the first current sensor 53 of the embodiment is a transformer, and the main circuit of each phase pole unit 16 respectively passes through the transformer.

[0122] Further, the housing 1 is further provided with a second transformer 10, and the main circuits of the plurality of phase pole units 16 respectively pass through the second transformer 10. The second transformer 10 is arranged in the base 11 and crosses the plurality of phase pole units 16.

[0123] Preferably, as shown in Figures 2-4 , the housing 1 includes a base 11 and a middle cover 12, the middle cover 12 is arranged above the base 11, the base 11 is provided with a base first part and a base second part along the length direction of the width of the circuit breaker, the base first part is provided with a plurality of base phase pole grooves along the width direction of the circuit breaker, the arc extinguishing mechanism, the rotating shaft mechanism 6, the moving contact 18, the static contact 19, the protection mechanism 5, the first current sensor 53 and two wiring terminals of each phase pole unit 16 are arranged in the corresponding base phase pole groove, and the N-pole unit 17 is also arranged in a corresponding base phase pole groove, and the second transformer 10 is arranged in the base second part and crosses the corresponding plurality of base phase pole grooves.

[0124] The middle cover 12 is provided with a middle cover first part and a middle cover second part along the length direction of the circuit breaker width, the middle cover first part is provided with a plurality of middle cover phase pole slots along the circuit breaker width direction, and the operating mechanism 3, the magnetic control mechanism 2 and the split excitation release 337 of each phase pole unit 16 are arranged in the corresponding middle cover phase pole slot; the power module 15 is arranged in the middle cover phase pole slot corresponding to the N pole unit 17; the measuring unit 13 and the comprehensive protection unit 14 are arranged side by side along the circuit breaker width direction in the middle cover second part, and cross a plurality of middle cover phase pole slots.

[0125] The multi-phase independent magnetic control measuring switch of the embodiment of the application can be independently controlled in manual and remote switching, and has reasonable overall layout and small size.

[0126] Preferably, the middle cover 12 is provided with a partition plate 120 between the base 11, the connecting rod 62 passes through the partition plate 120 and is connected between the contact support 61 and the operating mechanism 3. The traction rod 7 is installed in the base 11 and extends into the middle cover 12. The middle cover 12 is provided with a cover plate, the closing handle 41 and the opening button 42 pass through the cover plate and extend out, and the cover plate is separately arranged or integrally formed with the middle cover 12.

[0127] It should be noted that, in the description of the utility model, 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 in use, and are only for the convenience of description, and do not indicate that the device or element must have a specific orientation, and therefore cannot be understood as a limitation on the utility model. 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.

[0128] The above is a further detailed description of the utility model in combination with specific preferred embodiments, and the specific implementation of the utility model cannot be limited to these descriptions. For ordinary skilled persons in the technical field to which the utility model belongs, a number of simple deductions or substitutions can be made without departing from the concept of the utility model, and all of them should be regarded as falling within the protection scope of the utility model.

Claims

1. A circuit breaker comprising a housing (1) in which a plurality of phase pole units (16) are arranged side by side, characterized in that: Each phase pole unit (16) comprises a moving contact (18), a static contact (19), an arc extinguishing mechanism, an operating mechanism (3), a manual mechanism (4), a magnetic control mechanism (2) and a protection mechanism (5), the moving contact (18) is connected with a rotating shaft mechanism (6), the operating mechanism (3) of each phase pole unit (16) respectively drives the moving contact (18) and the static contact (19) to contact and separate through the respective rotating shaft mechanism (6); The manual mechanism (4) and the magnetic control mechanism (2) are connected with the operating mechanism (3) respectively, The magnetic control mechanism (2) can drive the rotating shaft mechanism (6) to rotate through the operating mechanism (3), so that the rotating shaft mechanism (6) drives the moving contact (18) to contact with the static contact (19), the manual mechanism (4) can drive the rotating shaft mechanism (6) to rotate through the operating mechanism (3), so that the rotating shaft mechanism (6) drives the moving contact (18) to contact and separate with the static contact (19), and the protection mechanism (5) is used for triggering the operating mechanism (3) to trip when a circuit fault occurs, so that the operating mechanism (3) drives the moving contact (18) to separate from the static contact (19) through the rotating shaft mechanism (6).

2. The circuit breaker of claim 1, wherein: A separate excitation tripper (337) is further included, the separate excitation tripper (337) is used for remotely controlling the operating mechanism (3) to trip, so that the operating mechanism (3) drives the moving contact (18) to separate from the static contact (19) through the rotating shaft mechanism (6).

3. The circuit breaker of claim 2, wherein: Further including a measurement unit (13), a comprehensive protection unit (14) and a power module (15), the magnetic control mechanism (2) and the separate excitation tripper (337) are connected with the comprehensive protection unit (14) respectively, the comprehensive protection unit (14) is connected with the measurement unit (13), and the power module (15) is connected with the measurement unit (13) and the comprehensive protection unit (14) to supply power for the measurement unit (13) and the comprehensive protection unit (14), the measurement unit (13) is used for collecting current and / or voltage signals of each phase pole unit (16), the comprehensive protection unit (14) judges whether a fault occurs according to the current and / or voltage signals collected by the measurement unit (13), and controls the separate excitation tripper (337) to trigger the operating mechanism (3) to trip when the fault occurs, and the comprehensive protection unit (14) can control the magnetic control mechanism (2) to drive the operating mechanism (3) to act, so that the operating mechanism (3) drives the moving contact (18) to contact with the static contact (19) through the rotating shaft mechanism (6).

4. The circuit breaker of claim 3, wherein: Three phase pole units (16) and one N-pole unit (17) arranged side by side on the side of the three phase pole units (16) are arranged in the shell (1), a power module (15) is arranged above the N-pole unit (17), the power module (15) is arranged side by side on the side of the magnetic control mechanism (2) of the three phase pole units (16), and the shell (1) further comprises a measurement unit (13) and a comprehensive protection unit (14), the measurement unit (13) and the comprehensive protection unit (14) are arranged side by side at one end of the N-pole unit (17) away from the power module (15) and one end of the three phase pole units (16) away from the magnetic control mechanism (2).

5. The circuit breaker of claim 1, wherein: The operating mechanism (3) comprises a driving rod (34), a locking mechanism and an unlocking mechanism, the driving rod (34) is connected with the rotating shaft mechanism (6), an energy storage mechanism is connected with the driving rod (34), the driving rod (34) can move between a closed position and an open position, when the driving rod (34) moves to the closed position, the rotating shaft mechanism (6) drives the moving contact (18) to contact the static contact (19), at the same time, the driving rod (34) is locked at the closed position by the locking mechanism and the energy storage mechanism is locked at an energy storage state; the unlocking mechanism is configured to drive the locking mechanism to release the locking of the driving rod (34) to release the energy storage mechanism, when the energy storage mechanism is released, the driving rod (34) moves to the open position, when the driving rod (34) moves to the open position, the rotating shaft mechanism (6) drives the moving contact (18) to separate from the static contact (19); The magnetic control mechanism (2) comprises a moving iron core (23) connected with the driving rod (34), the magnetic control mechanism (2) drives the driving rod (34) to move from the open position to the closed position through the moving iron core (23), the manual mechanism (4) comprises a closing handle (41) for driving the driving rod (34) to move, the closing handle (41) can drive the driving rod (34) to move from the open position to the closed position.

6. The circuit breaker of claim 5, wherein: The manual mechanism (4) comprises an opening button (42), the opening button (42) is configured to drive the unlocking mechanism to release the locking of the driving rod (34) by the locking mechanism; the circuit breaker further comprises a separate release (337), the separate release (337) is configured to drive the unlocking mechanism to release the locking of the driving rod (34) by the locking mechanism.

7. The circuit breaker of claim 5, wherein: The operating mechanism (3) comprises a support (35), the locking mechanism comprises a stop shaft (31), a locking piece (32) and a locking spring (323), the unlocking mechanism comprises an unlocking piece (33), the stop shaft (31), the locking piece (32) and the unlocking piece (33) are respectively installed on the support (35); The stop shaft (31) is eccentrically arranged with a stop mounting shaft (311), the stop shaft (31) can move between a locking position and an unlocking position by the circular motion around the stop mounting shaft (311), when the stop shaft (31) is located at the locking position, the driving rod (34) is blocked from moving from the closed position to the open position, when the stop shaft (31) is located at the unlocking position, the driving rod (34) can move from the closed position to the open position; The locking spring (323) is connected with the locking piece (32), for driving the locking piece (32) to push the stop shaft (31) to move to the locking position and limit the stop shaft (31) at the locking position, the unlocking piece (33) is moved by an external force to drive the locking piece (32) to release the limitation of the stop shaft (31), the stop shaft (31) can move to the unlocking position.

8. The circuit breaker of claim 7, wherein: The rotation center of the stop shaft (31) is arranged in parallel with the rotation center of the locking member (32), the unlocking member (33) is arranged to rotate, the rotation center of the unlocking member (33) is arranged in perpendicular to the rotation center of the locking member (32), and the unlocking member (33) is arranged between the rotation center of the locking member (32) and the stop shaft (31).

9. The circuit breaker of claim 8, wherein: The bracket (35) is provided with an unlocking hole (351) for the unlocking member (33) to pass through, the unlocking member (33) passes through the bracket (35) from the unlocking hole (351), the middle part of the unlocking member (33) is arranged in the bracket (35) to cooperate with the locking member (32), and the two ends of the unlocking member (33) are arranged on the two sides of the bracket (35) and are provided with the manual mechanism (4) and the protection mechanism (5) respectively to cooperate with the two ends of the unlocking member (33).

10. The circuit breaker of claim 9, wherein: The unlocking member (33) comprises an unlocking rod (331) and an unlocking rotating part (336) rotatably connected with the bracket (35), the unlocking rod (331) comprises an unlocking section (332) and first and second trigger sections (333) and (334) oppositely arranged on the two sides of the unlocking section (332), the second trigger section (334) is provided with a bent section (335) to cooperate with the manual mechanism (4), the manual mechanism (4) is provided with a disconnecting button (42), the disconnecting button (42) can push the bent section (335) to drive the unlocking rod (331) to rotate, so that the unlocking section (332) pushes the locking member (32) to unlock the stop shaft (31), and the protection mechanism (5) can push the first trigger section (333) to drive the unlocking rod (331) to rotate, so that the unlocking section (332) pushes the locking member (32) to unlock the stop shaft (31).

11. The circuit breaker of claim 10, wherein: The disconnecting device (337) is further arranged to cooperate with the first trigger section (333) of the unlocking member (33), the disconnecting device (337) can push the first trigger section (333) of the unlocking member (33) to drive the unlocking section (332) of the unlocking member (33) to unlock the stop shaft (31) by the locking member (32).

12. The circuit breaker of claim 10, wherein: The unlocking rod (331) is in a straight line shape, and the angle between the unlocking rod (331) and the height direction of the circuit breaker is 0-20 degrees.

13. The circuit breaker of claim 11, wherein: The locking member (32) comprises a locking rotating part (321) rotatably connected with the bracket (35) and a locking part (322) protruding in the radial direction of the locking rotating part (321), the end face of the locking part (322) away from the locking rotating part (321) is provided with a locking surface (324), the bracket (35) is provided with a locking limiting part (354), a locking spring (323) is connected between the bracket (35) and the locking member (32), the locking spring (323) drives the locking member (32) to rotate to the locking limiting part (354) in contact with the locking part (322) and the locking part (322) pushes the stop shaft (31) to move from the unlocking position to the locking position, and the locking surface (324) abuts against the stop shaft (31) to block the stop shaft (31) from moving from the locking position to the unlocking position.

14. The circuit breaker of claim 9, wherein: The support (35) comprises oppositely arranged bottom plate (352) and top plate (353), the stop shaft (31), locking piece (32), drive rod (34) are arranged between bottom plate (352) and top plate (353) respectively, bottom plate (352) and top plate (353) are respectively provided with unlocking hole (351) for unlocking piece (33) to pass through, locking fixed shaft (326) is arranged between bottom plate (352) and top plate (353) and is fixedly connected, locking piece (32) is rotatably arranged on locking fixed shaft (326), bottom plate (352) and top plate (353) are respectively provided with circular arc-shaped sliding groove (357), both ends of stop shaft (31) are respectively inserted into sliding groove (357) and are slidingly fitted, stop mounting shaft (311) is rotatably mounted on bottom plate (352) and top plate (353), stop shaft (31) is connected with stop mounting shaft (311) through stop connecting rod (312), and stop mounting shaft (311) is used as the center of rotation.

15. The circuit breaker of claim 5, wherein: The magnetic control mechanism (2) comprises a coil framework (21), a static iron core (22) and a moving iron core (23) arranged in the coil framework (21), a coil for driving the static iron core (22) and the moving iron core (23) to be attracted is arranged outside the coil framework (21), a magnetic control spring (24) is arranged between the moving iron core (23) and the static iron core (22), the moving iron core (23) is connected with the drive rod (34), and the magnetic control spring (24) serves as the energy storage mechanism.

16. The circuit breaker of claim 7, wherein: The manual mechanism (4) comprises a push plate (43) movably arranged on the support (35), and the closing handle (41) can drive the drive rod (34) to move from the opening position to the closing position through the push plate (43).

17. The circuit breaker of claim 16, wherein: The support (35) is provided with a guide groove, and the push plate (43) is provided with a guide shaft which is slidingly fitted into the guide groove.

18. The circuit breaker of claim 16, wherein: The push plate (43) is provided with two push parts (433), the drive rod (34) is provided with a transmission shaft (340), the two push parts (433) are oppositely arranged on both sides of the drive rod (34), and the two push parts (433) are used for pushing both ends of the transmission shaft (340) respectively, so that the transmission shaft (340) drives the drive rod (34) to move from the opening position to the closing position, and the reset spring (434) is connected with the push plate (43) and is used for driving the push plate (43) to reset.

19. The circuit breaker of claim 5, wherein: The rotating shaft mechanism (6) comprises a contact support (61) which is rotatably arranged, the drive rod (34) is provided with a transmission shaft (340), both ends of the transmission shaft (340) are rotatably connected with two connecting rods (62) respectively, and the two connecting rods (62) are rotatably connected with the contact support (61).

20. The circuit breaker of claim 9, wherein: Each phase pole unit (16) is respectively provided with a rotatingly arranged traction rod (7), the traction rod (7) comprises a driving part (71) matched with a protection mechanism (5), and a trigger part (72) matched with an unlocking piece (33) of the operating mechanism (3), the protection mechanism (5) comprises a bimetallic strip (51) and an armature (52), the bimetallic strip (51) and the armature (52) respectively push the driving part (71) when the overload current and the short-circuit current meet the threshold value, so that the traction rod (7) rotates and pushes the unlocking piece (33) through the trigger part (72), and the locking piece (32) is unlocked to stop the shaft (31) through the unlocking piece (33).

21. The circuit breaker of claim 1, wherein: A plurality of phase pole units (16) are arranged side by side along the width direction of the circuit breaker, and the operating mechanism (3) of each phase pole unit (16) is provided with a magnetic control mechanism (2) on one side along the length direction of the circuit breaker, and the operating mechanism (3) is provided with a manual mechanism (4) and a protection mechanism (5) on both sides along the height direction of the circuit breaker, respectively, the moving contact (18), the rotating shaft mechanism (6), the static contact (19) and the arc extinguishing mechanism of each phase pole unit (16) are arranged below the corresponding magnetic control mechanism (2) along the height direction of the circuit breaker, and the traction rod (7) and the split excitation release (337) are arranged between the protection mechanism (5) and the operating mechanism (3), and the protection mechanism (5) triggers the operating mechanism to release through the traction rod (7).

22. The circuit breaker of claim 3, wherein: The shell (1) comprises a base (11) and a middle cover (12), the middle cover (12) is arranged above the base (11), the base (11) is provided with a base first part and a base second part along the length direction of the width of the circuit breaker, the base first part is provided with a plurality of base phase pole grooves along the width direction of the circuit breaker, the arc extinguishing mechanism, the rotating shaft mechanism (6), the moving contact (18), the static contact (19), the protection mechanism (5), the first current sensor (53) and two wire terminals of each phase pole unit (16) are arranged in the corresponding base phase pole groove, and the second mutual inductor (10) is arranged in the base second part and crosses the corresponding plurality of base phase pole grooves; the middle cover (12) is provided with a middle cover first part and a middle cover second part along the length direction of the width of the circuit breaker, the middle cover first part is provided with a plurality of middle cover phase pole grooves along the width direction of the circuit breaker, the operating mechanism (3), the magnetic control mechanism (2) and the split excitation release (337) of each phase pole unit (16) are arranged in the corresponding middle cover phase pole groove, and the measurement unit (13) and the comprehensive protection unit (14) are arranged side by side in the middle cover second part along the width direction of the circuit breaker and cross the corresponding plurality of middle cover phase pole grooves.

23. The circuit breaker of claim 22, wherein: The circuit breaker further comprises an N-pole unit (17), the N-pole unit (17) is arranged in a corresponding base phase pole groove, and the power supply module (15) is arranged in the middle cover phase pole groove corresponding to the N-pole unit (17).

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