CN116798826A - Release, circuit breaker and control method of release - Google Patents

Abstract

The invention discloses a release, a circuit breaker and a control method thereof, wherein the release is provided with an automatic reset mechanism, the automatic reset mechanism can control a release main body to automatically return to a non-release state according to a reset control signal, so that the release main body releases the position restriction of a switch-on and switch-off mechanism, and the switch-on and switch-off mechanism can move under the drive of a driving mechanism such as a closed electromagnet and the like so as to drive a moving contact to be connected with a fixed contact. The tripping main body does not need manual reset, and the automatic reset can reduce the power failure time and improve the power supply reliability.

Description

Release, circuit breaker and control method of release

Technical Field

The invention relates to the technical field, in particular to a release, a circuit breaker and a control method thereof.

Background

Frame circuit breakers are an important form of circuit breaker, and the circuit breaker is generally provided with a steel frame, all parts are installed in the frame, the capacity of the circuit breaker is large, and the circuit breaker can be provided with a plurality of functional trippers and auxiliary contact terminals, and different trippers are combined to form different protection characteristics, so that the circuit breaker is multipurpose in a power end main switch.

The frame circuit breaker at least comprises a contact assembly and a release, when the conveying line of the frame circuit breaker fails, the release performs a releasing action, and a moving contact and a fixed contact of the contact assembly are separated, namely the circuit breaker is opened. At present, when the fault is removed, the tripping device can be switched on by manual reset.

Disclosure of Invention

The invention aims to provide a circuit breaker capable of automatically closing and a control method thereof.

The invention provides a release, which comprises a release main body, an automatic reset mechanism and a release driving mechanism, wherein the release main body can be in a non-release station and a release station in a reciprocating manner, the release driving mechanism is used for driving the release main body to be separated from the non-release station according to a release control signal, and the automatic reset mechanism is used for driving the release main body to return to the non-release station according to the reset control signal.

The tripping device is provided with the automatic reset mechanism, the automatic reset mechanism can control the tripping main body to automatically return to a non-tripping state according to a reset control signal, so that the tripping main body releases the position restriction of the opening and closing mechanism, and the opening and closing mechanism can move under the drive of the driving mechanisms such as the closing electromagnet, the shunt electromagnet and the like so as to drive the movable contact to be connected with or disconnected from the fixed contact. The tripping main body does not need manual reset, and the automatic reset can reduce the power failure time and improve the power supply reliability.

Optionally, the automatic reset mechanism includes a reset electromagnetic coil, and when the reset electromagnetic coil is in an energized state, under the electromagnetic force action of the reset electromagnetic coil, the trip main body returns to the non-trip station from the trip station.

Optionally, the automatic tripping device further comprises a micro switch, wherein the micro switch is connected with the reset electromagnetic coil in series and is linked with the tripping main body, and when the tripping main body reciprocates between the non-tripping station and the tripping station, the micro switch is driven to act so as to switch between an off state and an on state.

Optionally, the release includes a manual reset shaft that is linked with the release main body, and under the electromagnetic force action of the reset electromagnetic coil, the manual reset shaft acts to drive the release main body to return to the non-release station.

Optionally, the device further comprises an intermediate push rod, wherein the intermediate push rod is in linkage with the manual reset shaft, and the manual reset shaft drives the micro switch to act through the intermediate push rod so that the micro switch is in a conducting state and a disconnecting state.

Optionally, the trip driving mechanism includes a trip electromagnetic coil, and the trip main body is separated from the non-trip station under the action of electromagnetic force of energizing the trip electromagnetic coil.

Optionally, the device further comprises a mounting plate, wherein two or three of the reset electromagnetic coil, the micro switch and the tripping electromagnetic coil are integrally mounted on the mounting plate.

In addition, the invention also provides a circuit breaker, which comprises a circuit breaker body, wherein the circuit breaker body is provided with the following components:

the device comprises a moving contact, a fixed contact and a switching-on and switching-off mechanism;

the release of any one of the above, when the release main body is in a non-release station, the opening and closing mechanism can make the moving contact and the fixed contact in a closing state; when the tripping main body is separated from the non-tripping station, the tripping main body triggers the switching-on and switching-off mechanism so as to enable the moving contact and the fixed contact to be in a switching-off state;

and the controller can send out the tripping control signal and the reset control signal according to the working parameters of the circuit breaker.

Optionally, the controller includes a reset closing control strategy: when the fault of the main circuit of the circuit breaker is judged to be a fault which can be eliminated after the circuit breaker is disconnected by the controller and the tripping main body is in a tripping station, the controller sends a reset control signal to the automatic reset mechanism, after the tripping device returns to the non-tripping station, the controller sends a closing control instruction to the switching-on/off mechanism, and the switching-on mechanism acts to enable the moving contact to be connected with the fixed contact.

Optionally, the controller includes master controller and reclosing controller, and the two are independent to be set up and can electric communication, the master controller can receive and according to the main return circuit operating parameter of circuit breaker judges the operating condition of circuit breaker, when the master controller judges that main return circuit trouble is the trouble that can eliminate after taking place the brake action just the tripping main part is in the tripping operation, the master controller sends the signal extremely reclosing controller, reclosing controller sends reset control command extremely automatic reset mechanism, then reclosing controller sends closing control command extremely closing electromagnet.

Optionally, the opening and closing mechanism further includes a closing electromagnet of a short-time working system, and the closing control instruction includes: and the push rod of the closing electromagnet extends out to push the opening and closing mechanism to act so as to enable the moving contact to be connected with the fixed contact.

Optionally, the master controller is located inside the breaker body, and the reclosing controller is located outside the breaker body.

Optionally, the circuit breaker further comprises an alarm component, when the circuit breaker is switched on, the main controller judges that the main circuit still has faults, the main controller sends the tripping control signal and simultaneously sends an alarm instruction to the alarm component, and the alarm component sends an alarm signal according to the alarm instruction.

Optionally, the reclosing controller is further provided with a module for communicating with a remote closing control system, and is configured to receive a closing signal sent by the remote closing control system, and the reclosing controller sends a closing control instruction to the opening and closing mechanism according to the closing signal.

Furthermore, the invention also provides a control method of the circuit breaker, which comprises the following steps:

acquiring working parameters of a main loop of the circuit breaker;

and judging the fault type of the main loop according to the working parameters, and if the fault of the main loop is a fault which can be eliminated through opening and closing, and the release is at a tripping station, executing reset closing operation, wherein the reset closing operation comprises the steps of controlling the release to automatically return to a non-tripping station and connecting a moving contact and a fixed contact through an opening and closing mechanism.

Optionally, when the main loop still has a fault after the closing operation is performed, the tripping opening operation is performed and an alarm signal is sent.

The circuit breaker comprises the release and the control method, and the implementation basis of the circuit breaker comprises the release, so that the circuit breaker and the control method have the technical effects of the release.

Drawings

FIG. 1 is a schematic diagram of an interrupt router according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of a recloser controller according to one embodiment of the present invention;

FIG. 3 is a schematic diagram illustrating a portion of an interrupt router according to an embodiment of the present invention;

FIG. 4 is a schematic diagram of a release according to an embodiment of the present invention;

fig. 5 is an assembly schematic diagram of a release and a switching mechanism according to an embodiment of the present invention;

FIG. 6 is a schematic diagram of an assembly of a reset solenoid, a microswitch and a mounting plate of the trip unit of the present invention;

FIG. 7 is a schematic view of a mounting plate according to an embodiment of the invention.

Detailed Description

In order to make the technical solution of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.

Without loss of generality, the technical scheme and the technical effects are described by taking the circuit breaker as a frame circuit breaker as an example, and a person skilled in the art should understand that the technical scheme provided by the invention can be applied to other types of circuit breakers.

Referring to fig. 1 to 7, fig. 1 is a schematic structural diagram of an interrupt router according to an embodiment of the invention; FIG. 2 is a schematic diagram of a recloser controller according to one embodiment of the present invention; fig. 3 is a schematic structural diagram of a portion of an interrupt circuit breaker according to an embodiment of the present invention, and fig. 4 is a schematic structural diagram of a release according to an embodiment of the present invention; fig. 5 is an assembly schematic diagram of a release and a switching mechanism according to an embodiment of the present invention; FIG. 6 is a schematic diagram of an assembly of a reset solenoid, a microswitch and a mounting plate of the trip unit of the present invention; FIG. 7 is a schematic view of a mounting plate according to an embodiment of the invention.

Referring to fig. 1 and 3, the circuit breaker provided by the present invention mainly includes a circuit breaker body 10, a contact system, an opening and closing mechanism 2, a release 4, a controller, and other components.

The breaker body 10 mainly provides a mounting base and plays a role of protecting other parts, generally, the breaker body 10 is a shell structure, the shell structure is provided with an inner cavity, and most parts such as a contact system, an opening and closing mechanism 2, a release 4 and a controller are mounted on the surface or in the inner cavity of the shell structure. The specific structure of the breaker body 10 may be product specific and is not specifically limited herein.

The breaker body comprises a moving contact, a fixed contact and a switching-on and switching-off mechanism 2. The movable contact and the fixed contact are respectively and electrically connected with the first wiring terminal and the second wiring terminal, the first wiring terminal and the second wiring terminal are respectively connected with the wire inlet end and the wire outlet end, and the wire inlet end and the wire outlet end can be reversely connected. The fixed contact is fixed on the breaker body 10, namely the fixed contact is fixed relative to the breaker body 10, the moving contact is movably connected with the breaker body 10, the moving contact can move relative to the fixed contact under the drive of the opening and closing mechanism 2 so as to realize the engagement or the separation with the fixed contact, and the moving contact can be kept at the position engaged with the fixed contact and the position separated from the fixed contact under the action of the opening and closing mechanism 2.

When the movable contact is connected with the fixed contact, the circuit breaker is in a closing state, and a circuit connected to the first wiring terminal and the second wiring terminal is conducted through the circuit breaker; when the moving contact and the fixed contact are in a separation state, the moving contact and the fixed contact are not contacted, and a circuit connected to the first wiring terminal and the second wiring terminal is disconnected through the circuit breaker.

Referring to fig. 5, the specific structures of the moving contact, the fixed contact and the opening and closing mechanism 2 may have various forms, in a specific embodiment, the change of the gesture of the opening and closing mechanism 2 may be driven by the closing electromagnet 1 and the shunt electromagnet 6, and both the closing electromagnet 1 and the shunt electromagnet 6 are electromagnets in a short-time working system, and it should be noted that the short-time working system is a short-time period for power on, and the electromagnets are common components in the electric control field, so that the specific structure of the electromagnets will not be described herein, and will not obstruct understanding of the technical scheme in the present disclosure by those skilled in the art.

The closing electromagnet 1 is electrified, the push rod in the closing electromagnet stretches out and pushes the opening and closing mechanism 2 to act, the opening and closing mechanism 2 drives the moving contact to move towards the direction of the fixed contact, the moving contact is engaged with the fixed contact, the opening and closing mechanism 2 finally keeps the moving contact at a closing position, and the circuit breaker is in a closing state. Similarly, when the breaker needs to be opened, the shunt electromagnet 6 is electrified, a push rod in the shunt electromagnet 6 stretches out and pushes the opening and closing mechanism 2 to act, the opening and closing mechanism 2 drives the moving contact to move in a direction away from the fixed contact, the moving contact is separated from the fixed contact, and the moving contact is finally kept at the opening and closing position by the opening and closing mechanism 2, so that the breaker is opened.

The closing electromagnet 1 and the shunt electromagnet 6 are in a non-energized state in normal state, and the energizing time of the closing electromagnet 1 and the shunt electromagnet 6 can be determined according to products when the device works.

Normally, the operation of the closing electromagnet 1 is also limited by the release 4, when the release 4 is in a release state, the circuit of the closing electromagnet 1 is usually opened, even if the closing electromagnet 1 is electrified, the opening and closing mechanism 2 cannot perform a closing action, and only when the release 4 is in a non-release state, the closing electromagnet 1 is electrified, and the opening and closing mechanism 2 can perform a closing action.

Referring to fig. 4, the present invention further provides a release 4, which includes a release main body, an automatic reset mechanism and a release driving mechanism, wherein the release main body can be reciprocally located at a non-release station and a release station, the release driving mechanism is used for driving the release main body to separate from the non-release station according to a release control signal, that is, after the release driving mechanism receives the release control signal, the release main body can be driven to separate from the non-release station, and when the release main body is separated from the non-release station, the release main body will drive the opening and closing mechanism 2 to act so as to separate a moving contact from a fixed contact. Namely, when the tripping main body is separated from the non-tripping station, the tripping main body triggers the opening and closing mechanism 2 so as to enable the moving contact and the fixed contact to be in an opening state.

The automatic reset mechanism is used for driving the tripping main body to return to the non-tripping station according to the reset control signal, and when the tripping main body is in the non-tripping station (non-tripping state), the switching-on and switching-off mechanism 2 can enable the moving contact and the fixed contact to be in a switching-on state. Specifically, when the trip main body is in the non-trip station, the closing electromagnet 1 can be electrified for a short time to control the opening and closing mechanism 2 to act so as to enable the moving contact and the fixed contact to be connected. Naturally, in this state, the shunt electromagnet 6 may also control the moving contact in the closed state to be separated from the fixed contact.

The reset control signal may come from the controller of the circuit breaker itself, but may also come from an external control unit.

As can be seen from the above description, the trip unit 4 of the present invention has an automatic reset mechanism, and the automatic reset mechanism can control the trip main body to automatically return to the non-trip state according to the reset control signal, so that the trip main body releases the position restriction of the opening and closing mechanism 2, and the opening and closing mechanism 2 can move under the drive of the driving mechanism such as the closing electromagnet 1, so as to drive the moving contact to be engaged with the fixed contact. The tripping main body does not need manual reset, and the automatic reset can reduce the power failure time and improve the power supply reliability.

The automatic reclosing can be performed after the faults occur, and the automatic reclosing cannot be performed after the faults occur. Namely, breaker faults are divided into two types in advance: the circuit breaker can be eliminated after the first type of faults occur, and then automatic reclosing can be performed, and the second type of faults can not be performed. Normally, after the breaker is disconnected, the fault point is dissociated, the arc is extinguished, the insulation strength is recovered, the fault can be automatically eliminated, and the power supply can be recovered only by closing the breaker of the conveying line.

When the release 4 is applied to a circuit breaker, the invention also provides a control method of the circuit breaker, which comprises the following steps:

s1, acquiring working parameters of a main loop of a circuit breaker;

the operating parameters of the main circuit of the circuit breaker can be obtained by sensors installed at various positions of the main circuit and then transmitted to a controller of the circuit breaker, and the sensors can comprise a current signal sensor, a voltage signal sensor, a temperature sensor and the like. The controller can send out tripping control signals and reset control signals according to the working parameters of the circuit breaker. The operating parameters may be set according to the specific use environment.

S2, judging the fault type of the main loop according to the working parameters, if the fault of the main loop is a fault which can be eliminated through opening and the release is at a tripping station, executing reset switching-on operation, wherein the reset switching-on operation comprises controlling the release to automatically return to a non-tripping station and connecting a moving contact and a fixed contact through an opening and closing mechanism;

in a specific example, step S2 may specifically determine the working state of the main loop according to the working parameter, and if the main loop fails, execute a trip brake operation, where the trip brake operation includes: the release 4 is controlled to move to be separated from the non-release station and open the moving contact and the fixed contact; if the main loop fault is judged to be a fault which can be eliminated by opening and the release 4 is at a release station, a reset closing operation is performed, wherein the reset closing operation comprises the step of controlling the release 4 to automatically return to a non-release station and joint a moving contact and a fixed contact.

That is, the controller includes a reset closing control strategy: when the fault of the main circuit of the circuit breaker is judged to be the fault which can be eliminated by opening and the tripping main body is positioned at the tripping station, the controller sends a reset control signal to the automatic reset mechanism, and after the tripping device 4 returns to the non-tripping station, the controller sends a closing control instruction to the opening and closing mechanism 2, and the opening and closing mechanism 2 acts to enable the moving contact to be connected with the fixed contact.

As described above, the return of the trip unit 4 from the tripped position to the non-tripped position is achieved by an automatic reset mechanism, and the re-engagement of the moving contact and the fixed contact is achieved by a short-time energization of the closing electromagnet 1.

Referring to fig. 5 and 6, in one embodiment, the automatic reset mechanism may include a reset electromagnetic coil 402, and the trip body returns from the trip station to the non-trip station under the electromagnetic force of the reset electromagnetic coil 402 when the reset electromagnetic coil 402 is in the energized state. In the embodiment, the tripping main body is driven to reset by electromagnetic force, so that the tripping main body is simple and convenient.

Correspondingly, the reset closing operation in the control method specifically comprises the following steps: the reset electromagnetic coil 402 is electrified for a preset time period, the release 4 is restored to the non-release station by utilizing the electromagnetic force generated by the reset electromagnetic coil 402, when the release 4 is restored to the non-release station, the closing electromagnet 1 is electrified for a short time, and the push rod of the closing electromagnet 1 drives the opening and closing mechanism 2 to move so as to drive the movable contact to be connected with the fixed contact.

In order to improve the working reliability of the release 4, the automatic reset mechanism further comprises a micro switch 405, which is connected in series with the reset electromagnetic coil 402, and the micro switch is linked with the release main body, that is, the release main body moves to drive the micro switch to move, specifically, when the release main body moves from the non-release station to the release station, the micro switch 405 is driven to move to enable the micro switch 405 to be in a conducting state, so that a circuit where the reset electromagnetic coil 402 is located is in a conducting state, and only the reset electromagnetic coil 402 can be powered according to a reset control signal, thereby the reset electromagnetic coil 402 can generate electromagnetic force, under the electromagnetic force action of the reset electromagnetic coil 402, the release main body can restore to the non-release station from the release station, the release main body drives the micro switch 405 to move during reset, and the micro switch 405 returns to an off state.

In one particular control method, the manual reset shaft 401 pushes the micro-switch 405 through the intermediate push rod 406 to place the micro-switch 405 in an off state or an on state. When the controller judges that the fault can be eliminated after the breaker is opened, and the tripping main body is in the tripping station, the reset electromagnetic coil 402 is powered, and electromagnetic force can be generated to drive the manual reset shaft to act so as to drive the tripping main body to return to the non-tripping station. When the manual reset shaft 401 moves, the intermediate push rod 406 is pushed to reset rapidly, the intermediate push rod 406 drives the micro switch to act to the off state, and the circuit where the reset electromagnetic coil 402 is located is in the off state. Correspondingly, when the manual reset shaft 401 is tripped, the intermediate push rod 406 is driven to push the micro switch 405 to the conducting state during the process of moving to the tripping station.

In one embodiment, release 4 includes a manual reset shaft 401 that is coupled to the release body, and when reset solenoid 402 is energized, the electromagnetic force generated thereby drives manual reset shaft 401 to return the release body to the non-release position. In addition, an operator can manually operate the manual reset shaft 401 to enable the trip main body to return to the non-trip station, so that the use flexibility of the circuit breaker is further improved.

Of course, the extended portion of the manual reset shaft 401 is located at least on the face cover of the circuit breaker body 10 to facilitate the operator's operation from the outside.

In one embodiment, the trip drive mechanism includes a trip electromagnetic coil 404, and the trip body is disengaged from the non-trip station, i.e., the trip body enters the trip station, under the electromagnetic force of the trip electromagnetic coil 404 being energized.

That is, when it is determined that there is a fault in the main circuit according to the operating parameter, the trip electromagnetic coil 404 is energized and the trip body is disengaged from the first position.

Referring to fig. 5 again, in a specific embodiment, the trip main body includes a trip shaft 403, when the trip shaft 403 is located at a non-trip station, the trip shaft 403 is located above the opening and closing mechanism 2, and when the controller determines that the main circuit has a fault according to the working parameters, the trip electromagnetic coil 404 is powered on, the push rod of the trip electromagnetic coil 404 stretches out to push the trip shaft 403 to act, the trip shaft 403 presses the trip half shaft of the opening and closing mechanism 2, the opening and closing mechanism 2 drives the moving contact to separate from the fixed contact, and meanwhile, the trip shaft 403 is limited at the trip station. When the controller judges that the obstacle of the main loop can be eliminated after the breaker is opened, the circuit where the reset electromagnetic coil 402 is located is closed, and under the electromagnetic force action of the reset electromagnetic coil 402, the trip shaft 403 can be reset to the non-trip station. Specifically, the trip shaft 403 may be limited to the trip station under the action of the manual reset shaft 401, and when the reset electromagnetic coil 402 is energized, the push rod therein may drive the manual reset shaft 401 to reset under the driving of electromagnetic force, while the trip shaft 403 is released to return to the non-trip station.

In the above embodiments, two or three of the reset electromagnetic coil 402 and the micro switch 405 are integrally mounted on the same mounting plate 406. For example, the reset electromagnetic coil 402 and the micro switch 405 are integrally mounted on the same mounting plate 406; or the reset electromagnetic coil 402, the micro switch 405 and the trip electromagnetic coil 404 are integrally mounted on the same mounting plate.

Referring to fig. 6 and 7, two fixing shafts 4061, screw holes 4062, pin positioning blocks 4063 and clamping holes 4064 are provided on the mounting plate, and the micro switch 405 determines the mounting position through the two fixing shafts 4061, and then fixes the micro switch to the mounting plate through a hot riveting process. The reset electromagnet is clamped and fixed on the mounting plate 406 through three clamping holes 4064. The mounting plate is fixed with the trip body by screws mounted in screw holes 4062 and pin positioning blocks 4063. Thus, the release 4 has a compact structure and a small volume.

In a specific example, the controller may include a master controller 3 and a reclosing controller 5, which are independently disposed and can be in electrical communication, where the master controller 3 is capable of receiving and judging an operating state of the circuit breaker according to a main circuit operating parameter of the circuit breaker, and when the master controller 3 judges that a main circuit fault can be eliminated after the circuit breaker is opened and the trip main body is at a trip station, the master controller 3 sends a signal to the reclosing controller, the reclosing controller 5 sends a reset control instruction to the automatic reset mechanism, and then the reclosing controller sends a closing control instruction to the opening and closing mechanism 2.

In the above embodiment, the master controller 3 may be an intelligent controller inside the circuit breaker, the master controller 3 is located inside the circuit breaker body 10, and the recloser controller 5 may be a separate accessory, which may be located outside the circuit breaker body 10. Thus, according to the requirements of customers, the control can be realized on the structure of the existing breaker by adding the reclosing controller 5, and the main controller 3 and the reclosing controller are two independent modules, so that the use flexibility can be improved.

In order to improve the safety of the circuit in which the circuit breaker is located, the following arrangement may be performed.

In a specific embodiment, the circuit breaker may further include an alarm component, when the circuit breaker is closed, the main controller 3 determines that the main circuit has a fault, the main controller 3 sends a trip control signal, the trip unit 4 breaks away from the non-trip station, and the controller sends an alarm instruction to the alarm component, and the alarm component sends an alarm signal according to the alarm instruction. At the moment, an operator can perform on-site processing according to the alarm signal, and then perform manual closing after removing the fault. I.e. the trip unit 4 is manually returned to the non-trip station, and then the movable contact and the fixed contact are controlled to be engaged.

Correspondingly, the control method of the circuit breaker further comprises the following steps: and when the main circuit still has faults after the closing operation is executed, executing the tripping and opening operation and sending out an alarm signal.

In the embodiments, the reclosing controller is further provided with a module in communication with the remote closing control system, and is configured to receive a closing signal sent by the remote closing control system, and send a closing control instruction to the opening and closing mechanism 2 according to the closing signal.

In the above embodiment, the closing signal of the remote closing control system is sent to the reclosing controller, and the reclosing controller controls the closing electromagnet 1 to act, so that the phenomenon of signal collision caused by that the remote closing control system and the reclosing controller send control signals to the closing electromagnet 1 simultaneously is avoided, and the reliability of control is improved.

The circuit breaker and the control method provided by the invention are described in detail. The principles and embodiments of the present invention have been described herein with reference to specific examples, the description of which is intended only to facilitate an understanding of the method of the present invention and its core ideas. It should be noted that it will be apparent to those skilled in the art that various modifications and adaptations of the invention can be made without departing from the principles of the invention and these modifications and adaptations are intended to be within the scope of the invention as defined in the following claims.

Claims (16)

1. The utility model provides a release, its characterized in that includes trip main part, automatic re-setting mechanism and trip actuating mechanism, the trip main part can reciprocate in non-trip station and trip station, trip actuating mechanism is used for according to the drive of trip control signal the trip main part breaks away from non-trip station, automatic re-setting mechanism is used for according to the drive of reset control signal the trip main part is replied to non-trip station.

2. The release of claim 1, wherein the automatic reset mechanism includes a reset solenoid, and wherein the trip body is returned from the trip station to the non-trip station by an electromagnetic force of the reset solenoid when the reset solenoid is in an energized state.

3. The trip unit of claim 2, wherein the automatic reset mechanism further comprises a microswitch connected in series with the reset solenoid and in linkage with the trip body, the trip body moving reciprocally between the non-trip station and the trip station to actuate the microswitch to switch the microswitch between an off state and an on state.

4. The trip unit of claim 3, wherein said trip unit includes a manual reset shaft in linkage with said trip body, said manual reset shaft acting under the electromagnetic force of said reset electromagnetic coil to drive said trip body to revert to said non-trip station.

5. The trip unit of claim 4, further comprising an intermediate push rod coupled to the manual reset shaft, the manual reset shaft actuating the micro-switch via the intermediate push rod to place the micro-switch in an on state and in an off state.

6. The trip unit of any one of claims 2 to 5, wherein said trip drive mechanism includes a trip electromagnetic coil, said trip body being disengaged from said non-trip station by electromagnetic force of energization of said trip electromagnetic coil.

7. The trip unit of claim 6, further comprising a mounting plate, wherein two or three of the reset solenoid, the microswitch, and the trip solenoid are integrally mounted to the mounting plate.

8. A circuit breaker comprising a circuit breaker body, the circuit breaker body being fitted with:

the device comprises a moving contact, a fixed contact and a switching-on and switching-off mechanism;

the release of any one of claims 1 to 7, the opening and closing mechanism being capable of placing the moving contact and the stationary contact in a closed state when the trip body is in a non-trip position; when the tripping main body is separated from the non-tripping station, the tripping main body triggers the switching-on and switching-off mechanism so as to enable the moving contact and the fixed contact to be in a switching-off state;

and the controller can send out the tripping control signal and the reset control signal according to the working parameters of the circuit breaker.

9. The circuit breaker of claim 8, wherein the controller pre-stores a first type of fault, the first type of fault being a fault that can be eliminated by breaking; the controller also comprises a reset closing control strategy: when the faults of the main circuit of the circuit breaker are the first type of faults and the tripping main body is in a tripping station, the controller sends a reset control signal to the automatic reset mechanism, and after the tripping device returns to the non-tripping station, the controller sends a closing control instruction to drive the opening and closing mechanism to act so as to enable the moving contact to be connected with the fixed contact.

10. The circuit breaker of claim 9, wherein the controller comprises a master controller and a reclosing controller, the master controller and reclosing controller being independently configured and capable of electrical communication, the master controller being capable of receiving and determining an operational state of the circuit breaker based on a primary circuit operational parameter of the circuit breaker, the master controller sending a signal to the reclosing controller when the master controller determines that the primary circuit fault is of the first type and the trip body is in a trip station, the reclosing controller sending the reset control command to the automatic reset mechanism, and the reclosing controller then sending the closing control command.

11. The circuit breaker of claim 9, further comprising a closing electromagnet for a brief operating regime, the closing control command comprising: and the push rod of the closing electromagnet extends out to push the opening and closing mechanism to act so as to enable the moving contact to be connected with the fixed contact.

12. The circuit breaker according to any of claims 9 to 11, wherein the master is located inside the circuit breaker body and the recloser controller is located outside the circuit breaker body.

13. The circuit breaker according to any one of claims 9 to 11, further comprising an alarm unit, wherein when the main controller determines that there is a fault in the main circuit after the circuit breaker is closed, the main controller transmits the trip control signal and simultaneously transmits an alarm command to the alarm unit, and the alarm unit transmits an alarm signal according to the alarm command.

14. The circuit breaker of any of claims 9 to 11, wherein the recloser controller further has a module in communication with a remote closing control system for receiving a closing signal from the remote closing control system, the recloser controller issuing the closing control command to actuate the opening and closing mechanism in accordance with the closing signal.

15. A control method of a circuit breaker, the control method comprising:

acquiring working parameters of a main loop of the circuit breaker;

and judging the fault type of the main loop according to the working parameters, and if the fault of the main loop is a fault which can be eliminated through opening and closing, and the release is at a tripping station, executing reset closing operation, wherein the reset closing operation comprises the steps of controlling the release to automatically return to a non-tripping station and connecting a moving contact and a fixed contact through an opening and closing mechanism.

16. The control method of the circuit breaker according to claim 15, wherein the trip opening operation is performed and an alarm signal is issued when there is still a fault in the main circuit after the closing operation is performed.