阅读说明：本技术 一种断路器及其灭弧室 (Circuit breaker and arc extinguish chamber thereof ) 是由 钟建英 胡飞良 郭煜敬 刘庆 孙广雷 李旭旭 刘志远 王建华 杨帆 何创伟 毕迎 于 2021-07-05 设计创作，主要内容包括：本发明涉及一种断路器及其灭弧室。灭弧室包括：密封壳体,动、静触头组件以及电位触发电极模块,电位触发电极模块包括电位触发电极,其具有处于对应触头组件的触头的合闸对接一端位置的放电端；电位触发电极用于在动触头合闸行程的靠近末端位置、断路器所需投切相位处,由放电端朝向对侧触头放电而使动、静触头之间建立导通路径。本发明的灭弧室通过设置电位触发电极,能够在动触头的合闸行程末端,即靠近静触头但尚未完全合闸的过程中,根据需要在所需投切相位,通过电位触发电极的放电触发动静触头之间产生击穿路径,即建立导通路径,如此即摆脱了动、静触头合闸控制的约束和限制,实现了根据所需投切相位进行准确投切的目的。(The invention relates to a circuit breaker and an arc extinguish chamber thereof. The explosion chamber includes: the electric potential trigger electrode module comprises an electric potential trigger electrode which is provided with a discharge end which is positioned at one end of a closing butt joint of the contact of the corresponding contact component; the potential trigger electrode is used for establishing a conduction path between the moving contact and the static contact by discharging from the discharging end towards the opposite side contact at the position close to the tail end of the closing stroke of the moving contact and the position of the switching phase required by the circuit breaker. According to the arc extinguish chamber, the potential trigger electrode is arranged, so that a breakdown path can be generated between the movable contact and the static contact through the discharge trigger of the potential trigger electrode at the required switching phase as required at the tail end of the switching stroke of the movable contact, namely in the process of being close to the static contact but not completely switched, namely, a conduction path is established, the restriction and limitation of the switching control of the movable contact and the static contact are eliminated, and the aim of accurately switching according to the required switching phase is fulfilled.)

1. An arc chute, comprising:

a sealed housing having a closed interior cavity;

the static contact assembly (201) comprises a static conductive rod (101) and a static contact (102), and is relatively fixed and hermetically connected with the sealed shell;

the moving contact component (202) comprises a moving conducting rod (104) and a moving contact (103), is arranged opposite to the static contact component (201), is movably and hermetically connected with the sealing shell, and can move close to and far away from the static contact component (201) relative to the sealing shell to perform opening and closing actions;

characterized by, the explosion chamber still includes:

a potential trigger electrode module disposed in correspondence with one of the contact assemblies, comprising:

the potential trigger electrode (114) is insulated and isolated from the contact of the corresponding contact assembly and is provided with a discharge end at the position of one end of the contact of the corresponding contact assembly, which is butted with the closing switch;

the potential trigger electrode (114) is used for establishing a conduction path between the moving contact and the static contact by discharging from the discharging end to the opposite contact at the position close to the tail end of the closing stroke of the moving contact (103) and the switching phase position required by the circuit breaker.

2. Arc chute according to claim 1, characterized in that said potential triggering electrode (114) is arranged in correspondence of a stationary contact assembly (201).

3. Arc chute according to claim 1 or 2, characterized in that the potential trigger electrode (114) extends in a straight line along the axial direction of the conductive rod of the corresponding contact, and has one end extending to the closing butt end of the corresponding contact and the other end extending from the sealed housing.

4. The arc extinguish chamber according to claim 3, wherein the contact of the contact assembly corresponding to the potential trigger electrode (114) is disc-shaped, the disc-shaped contact is positioned at the end part of the conducting rod and protrudes out of the conducting rod in the radial direction, a through hole penetrating in the axial direction of the conducting rod is formed in the part, protruding out of the conducting rod in the radial direction, of the disc-shaped contact, and one end, protruding into the through hole, of the potential trigger electrode (114) is a discharge end.

5. The arc extinguish chamber according to claim 4, wherein the disk-shaped contact has a flat central portion facing a side surface of the other contact, and a slanted peripheral portion, the through hole is formed in a region corresponding to the slanted surface, and the discharge end extends out of the through hole and is not higher than the flat central portion.

6. Arc chute according to claim 3, characterized in that the potential triggering electrode module comprises an insulating tube, the potential triggering electrode (114) being mounted in the insulating tube and being insulated from the contacts by the insulating tube.

7. Arc chute according to claim 3, characterized in that the potential trigger electrode module is arranged close to the conducting rod.

8. The arc extinguish chamber according to claim 6, wherein the sealed shell comprises a cylindrical shell (107), and a movable end cover plate (112) and a fixed end cover plate (105) which are hermetically arranged at two ends of the cylindrical shell (107), the movable contact assembly (202) is hermetically and movably arranged on the movable end cover plate (112), one end of the closing butt joint is positioned in the cylindrical shell (107), the fixed contact assembly (201) is hermetically and fixedly arranged on the fixed end cover plate (105), and one end of the potential trigger electrode module extends out of the sealed shell from the fixed end cover plate (105).

9. A circuit breaker, comprising:

the operating mechanism, the arc extinguish chamber and the control system;

characterized in that the arc-extinguishing chamber is as claimed in any one of claims 1 to 8,

the control system is connected with the operating mechanism and the potential trigger electrode module of the arc extinguish chamber, and controls the potential trigger electrode module to discharge to the opposite side contact to establish a conduction path between the moving contact and the static contact at the position, close to the tail end, of the closing stroke of the moving contact (103) and at the switching phase position required by the circuit breaker.

10. The circuit breaker according to claim 9, characterized in that the circuit breaker further comprises a multifunctional module (203), the multifunctional module (203) is fixedly mounted on the arc chute and connected with the potential trigger electrode module, the multifunctional module (203) is connected with the control system, and the multifunctional module (203) comprises a charging unit and a battery module for supplying power to the potential trigger electrode module.

11. The circuit breaker according to claim 10, characterized in that the arc chute is a vacuum arc chute, and the multifunctional module (203) further comprises a vacuum degree measuring module for detecting the vacuum degree in the vacuum arc chute.

Technical Field

The invention relates to the field of high-voltage switches, in particular to a circuit breaker and an arc extinguish chamber thereof.

Background

The vacuum circuit breaker is generally applied to the on-off of an alternating current power grid in the field of medium and low voltage at present, is a core device which is related to whether the vacuum circuit breaker can successfully turn on or off fault current, and has the characteristics of high reliability, no maintenance, strong on-off capability and the like. In order to meet the needs of economic and industrial development, the strength of power grid transformation and capacity expansion is gradually increased in China, the investment of the power equipment industry is greatly increased, and the development of a vacuum arc-extinguishing chamber to high voltage and high capacity is promoted. When the power system switches inductive and capacitive electrical equipment, if the switching phase, time and strategy of the circuit breaker are improperly controlled, transient overvoltage or overcurrent is brought, large impact is generated on the power equipment and the power system, and great adverse effects are caused on the production work of the power equipment and the power system. Therefore, how to enable the arc extinguish chamber to realize phase selection and closing accurately has great significance.

Disclosure of Invention

The invention aims to provide a circuit breaker capable of realizing accurate phase selection and closing, and aims to solve the problem that the existing circuit breaker cannot realize phase selection and closing and has adverse effects on power equipment and a power system. Meanwhile, the invention also aims to provide an arc extinguish chamber matched with the circuit breaker.

The arc chute of the present invention comprises:

a sealed housing having a closed interior cavity;

the static contact component comprises a static conducting rod and a static contact, and is relatively fixed and hermetically connected with the sealing shell;

the moving contact component comprises a moving conducting rod and a moving contact, is arranged opposite to the static contact component, is movably and hermetically connected with the sealing shell, and can move close to and far away from the static contact component relative to the sealing shell to perform opening and closing actions;

a potential trigger electrode module disposed in correspondence with one of the contact assemblies, comprising:

the potential trigger electrode is insulated and isolated from the contact of the corresponding contact assembly and is provided with a discharge end positioned at one end of the closing butt joint of the contact of the corresponding contact assembly;

the potential trigger electrode is used for establishing a conduction path between the moving contact and the static contact by discharging from the discharging end towards the opposite side contact at the position close to the tail end of the closing stroke of the moving contact and the position of the switching phase required by the circuit breaker.

According to the arc extinguish chamber, the potential trigger electrode is arranged, so that a breakdown path is generated between the movable contact and the static contact through discharge triggering of the potential trigger electrode at the required switching phase as required at the tail end of the switching stroke of the movable contact, namely in the process of being close to the static contact but not completely switched on, namely, a conduction path is established, so that the restriction and limitation of the switching-on control of the movable contact and the static contact are eliminated, the aim of accurately switching according to the required switching phase is fulfilled, and the adverse effect of a traditional circuit breaker on an electric power system during switching-on is avoided.

Furthermore, the potential trigger electrode is arranged corresponding to the static contact component, and compared with the situation that the potential trigger electrode is arranged corresponding to the moving contact component, the structure is simple.

Furthermore, the potential trigger electrode extends linearly along the axial direction of the conducting rod corresponding to the contact, one end of the potential trigger electrode extends to the closing butt joint end of the corresponding contact, and the other end of the potential trigger electrode extends out of the sealed shell. The arrangement makes the overall structure in the arc extinguishing chamber more regular, and is convenient for ensuring the uniformity of the internal electric field.

Furthermore, a contact of the contact assembly corresponding to the potential trigger electrode is disc-shaped, the disc-shaped contact is positioned at the end part of the conducting rod and protrudes out of the conducting rod in the radial direction, a through hole which is through in the axial direction of the conducting rod is formed in the part, protruding out of the conducting rod in the radial direction, of the disc-shaped contact, and one end, extending into the through hole, of the potential trigger electrode is a discharging end. The arrangement facilitates the fixed installation of the potential trigger electrode and is beneficial to meeting the requirement of an electric field inside the arc extinguish chamber.

Furthermore, the middle part of one side surface of the disc-shaped contact facing the other contact is a plane, the periphery of the disc-shaped contact is an inclined surface, the through hole is formed in the area corresponding to the inclined surface, and the discharge end extends out of the through hole and is not higher than the plane part of the middle part. The discharge end extends out of the through hole, so that discharge towards the opposite side contact is facilitated, and a breakdown path is conveniently formed between the moving contact and the fixed contact.

Further, the potential trigger electrode module comprises an insulating tube, the potential trigger electrode is installed in the insulating tube, and the potential trigger electrode is isolated from the contact through the insulating tube. Therefore, the insulation isolation between the potential trigger electrode and the contact can be conveniently and reliably realized.

Further, the potential trigger electrode module is close to the conducting rod, so that the requirement of an electric field in the arc extinguish chamber can be better met.

In addition, the sealing shell comprises a cylindrical shell, a movable end cover plate and a static end cover plate which are hermetically arranged at two ends of the cylindrical shell, the movable contact assembly is movably arranged on the movable end cover plate in a sealing mode, one end of the closed butt joint is located in the cylindrical shell, the static contact assembly is fixedly arranged on the static end cover plate in a sealing mode, and one end of the potential trigger electrode module extends out of the sealing shell from the static end cover plate.

The circuit breaker of the present invention comprises:

the operating mechanism, the arc extinguish chamber and the control system;

wherein the explosion chamber includes:

a sealed housing having a closed interior cavity;

the static contact component comprises a static conducting rod and a static contact, and is relatively fixed and hermetically connected with the sealing shell;

the moving contact component comprises a moving conducting rod and a moving contact, is arranged opposite to the static contact component, is movably and hermetically connected with the sealing shell, and can move close to and far away from the static contact component relative to the sealing shell to perform opening and closing actions;

a potential trigger electrode module disposed in correspondence with one of the contact assemblies, comprising:

the potential trigger electrode is insulated and isolated from the contact of the corresponding contact assembly and is provided with a discharge end positioned at one end of the closing butt joint of the contact of the corresponding contact assembly;

the potential trigger electrode is used for establishing a conduction path between the moving contact and the static contact by discharging from the discharging end to the opposite side contact at the position close to the tail end of the closing stroke of the moving contact and the position of the switching phase required by the circuit breaker;

the control system is connected with the operating mechanism and the potential trigger electrode module of the arc extinguish chamber, and controls the potential trigger electrode module to discharge to the opposite side contact to establish a conduction path between the moving contact and the static contact at the position of the moving contact close to the tail end and at the position of the switching phase required by the circuit breaker.

According to the arc extinguish chamber, the potential trigger electrode is arranged, so that a breakdown path is generated between the movable contact and the static contact through discharge triggering of the potential trigger electrode at the required switching phase as required at the tail end of the switching stroke of the movable contact, namely in the process of being close to the static contact but not completely switched on, namely, a conduction path is established, so that the restriction and limitation of the switching-on control of the movable contact and the static contact are eliminated, the aim of accurately switching according to the required switching phase is fulfilled, and the adverse effect of a traditional circuit breaker on an electric power system during switching-on is avoided.

Furthermore, the potential trigger electrode is arranged corresponding to the static contact component, and compared with the situation that the potential trigger electrode is arranged corresponding to the moving contact component, the structure is simple.

Furthermore, the potential trigger electrode extends linearly along the axial direction of the conducting rod corresponding to the contact, one end of the potential trigger electrode extends to the closing butt joint end of the corresponding contact, and the other end of the potential trigger electrode extends out of the sealed shell. The arrangement makes the overall structure in the arc extinguishing chamber more regular, and is convenient for ensuring the uniformity of the internal electric field.

Furthermore, a contact of the contact assembly corresponding to the potential trigger electrode is disc-shaped, the disc-shaped contact is positioned at the end part of the conducting rod and protrudes out of the conducting rod in the radial direction, a through hole which is through in the axial direction of the conducting rod is formed in the part, protruding out of the conducting rod in the radial direction, of the disc-shaped contact, and one end, extending into the through hole, of the potential trigger electrode is a discharging end. The arrangement facilitates the fixed installation of the potential trigger electrode and is beneficial to meeting the requirement of an electric field inside the arc extinguish chamber.

Furthermore, the middle part of one side surface of the disc-shaped contact facing the other contact is a plane, the periphery of the disc-shaped contact is an inclined surface, the through hole is formed in the area corresponding to the inclined surface, and the discharge end extends out of the through hole and is not higher than the plane part of the middle part. The discharge end extends out of the through hole, so that discharge towards the opposite side contact is facilitated, and a breakdown path is conveniently formed between the moving contact and the fixed contact.

Further, the potential trigger electrode module comprises an insulating tube, the potential trigger electrode is installed in the insulating tube, and the potential trigger electrode is isolated from the contact through the insulating tube. Therefore, the insulation isolation between the potential trigger electrode and the contact can be conveniently and reliably realized.

Further, the potential trigger electrode module is close to the conducting rod, so that the requirement of an electric field in the arc extinguish chamber can be better met.

In addition, the sealing shell comprises a cylindrical shell, a movable end cover plate and a static end cover plate which are hermetically arranged at two ends of the cylindrical shell, the movable contact assembly is movably arranged on the movable end cover plate in a sealing mode, one end of the closed butt joint is located in the cylindrical shell, the static contact assembly is fixedly arranged on the static end cover plate in a sealing mode, and one end of the potential trigger electrode module extends out of the sealing shell from the static end cover plate.

And, the circuit breaker still includes multi-functional module, and multi-functional module fixed mounting just meets with electric potential trigger electrode module on the explosion chamber, and multi-functional module links to each other with control system, and multi-functional module contains charging unit, battery module to for electric potential trigger electrode module energy supply. Therefore, the multifunctional module can independently supply energy to the potential trigger electrode module, a longer energy supply circuit does not need to be connected and led from the potential trigger electrode module, and the structure of the circuit breaker is simplified.

In addition, the explosion chamber is vacuum arc extinguishing chamber, and multifunctional module still is used for detecting the vacuum measurement module to the vacuum in the vacuum arc extinguishing chamber. Therefore, when the discharge end is required to discharge, the discharge parameters can be correspondingly adjusted according to the vacuum degree in the vacuum arc-extinguishing chamber, and the generation of a breakdown path is reliably ensured.

Drawings

Fig. 1 is a schematic structural diagram of an arc extinguishing chamber portion in a circuit breaker according to an embodiment of the present invention;

FIG. 2 is a schematic view showing an internal structure of a display portion of FIG. 1;

fig. 3 is a schematic structural diagram showing the moving and static contacts and the floating potential trigger electrode module and the multifunctional module in the opening state in fig. 2;

fig. 4 is a schematic structural diagram showing the moving and static contacts and the floating potential trigger electrode module and the multifunctional module in the closing state in fig. 2;

fig. 5 is an enlarged view of the connecting positions of the moving contact and the static contact in fig. 4;

fig. 6 is a schematic structural view of an arc extinguishing chamber of the present invention.

In the figure: 101. a static conductive rod; 102. static contact; 103. a moving contact; 104. a movable conductive rod; 105. a stationary end cover plate; 106. a static contact shielding case; 107. a cylindrical housing; 108. a middle shield case; 110. a bellows; 111. a moving contact shielding case; 112. a movable end cover plate; 113. a ceramic insulating sleeve; 114. a potential trigger electrode; 201. a stationary contact assembly; 202. a moving contact assembly; 203. a multifunctional module; 204. the suspension potential triggers the electrode module.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.

It is noted that relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The features and properties of the present invention are described in further detail below with reference to examples.

The first embodiment of the circuit breaker of the invention:

the circuit breaker of this embodiment includes the vacuum interrupter who mainly carries out circuit breaking, transmission connection in vacuum interrupter's operating mechanism and control system. The control system is connected with the operating mechanism and can control the operation of the operating mechanism according to the requirement.

Fig. 1 mainly shows a structure of an arc extinguish chamber in the circuit breaker of this embodiment, the arc extinguish chamber mainly includes a sealed housing and moving and static contact assemblies 201 disposed in the sealed housing, the moving contact assembly 202 includes a moving conductive rod 104 and a moving contact 103 connected to an end of the moving conductive rod 104, and the static contact assembly 201 includes a static conductive rod 101 and a static contact 102 connected to an end of the static conductive rod 101.

The sealed shell comprises a cylindrical shell 107, a movable end cover plate 112 and a fixed end cover plate 105 which are hermetically mounted at two ends of the cylindrical shell 107, a movable contact assembly 202 is hermetically connected to the movable end cover plate 112 through flexible connection, one end of the movable contact assembly 202, which is in a closing butt joint, is a movable contact 103 and is located in the cylindrical shell 107, a fixed contact assembly 201 is hermetically connected to the fixed end cover plate 105 and is fixedly connected with the fixed end cover plate 105, and one end of the fixed contact assembly 201, which is in the closing butt joint, is a fixed contact 102 and is located in the cylindrical shell 107. The moving contact assembly 202 is connected to the moving end cover 112 by a conventional connection form of the corrugated tube 110, that is, one end of the corrugated tube 110 is hermetically connected to the through hole of the moving end cover 112, and the other end of the corrugated tube is hermetically connected to the moving conductive rod 104 of the moving contact assembly 202, so that the moving contact assembly 202 is sealed with the sealing housing when performing a switching-off operation with respect to the sealing housing. The action output end of the operating mechanism is connected to the moving conductive rod 104 through a transmission structure, so as to drive the moving contact 103 to complete the switching-on action.

A cylindrical middle shield 108 for shielding the moving contact and the static contact inside is fixed at the position of the opening and closing of the moving contact and the static contact in the sealed shell, a moving contact shield 111 is fixedly connected to the inner side of the moving contact cover plate in the sealed shell, and a static contact shield 106 is fixedly connected to the inner side of the static end cover plate 105, so as to respectively play a role of homogenizing an internal electric field.

In this embodiment, a floating potential trigger electrode module 204 is further configured in the arc extinguishing chamber, and the floating potential trigger electrode module 204 is mainly used for generating a breakdown path between one contact (called as a power receiving contact) and the power receiving contact by discharging high-voltage pulses to one of the contacts when the moving contact and the static contact are about to be switched on but not yet switched on and when the current is at a required switching phase, so as to force the two contacts to generate a breakdown path therewith, and forcibly switch on the moving contact and the static contact. Certainly, in order to generate a breakdown path between the floating potential trigger electrode module 204 and the power receiving contact to drive the moving contact and the static contact to generate a breakdown path, a certain requirement needs to be imposed on the position of the floating potential trigger electrode module 204, and since the principle of generating the breakdown path between the switch contacts through the trigger electrode and the application of the principle are already embodied on the existing trigger switch, detailed description of the working principle of the existing trigger switch is not provided herein.

The assembly relationship of the floating potential trigger electrode module 204 in the arc extinguishing chamber in the present embodiment is shown in fig. 2-6, the floating potential trigger electrode module 204 includes a potential trigger electrode 114 and a porcelain insulating tube, and the potential trigger electrode 114 is linear and is installed in the insulating tube. The fixed contact 102 and the movable contact 103 are both disc-shaped contacts, the fixed conducting rod 101 and the movable conducting rod 104 are both linear round rods, and the diameters of the fixed contact 102 and the movable contact 103 are both larger than the outer diameters of the corresponding conducting rods, so that the fixed contact 102 and the movable contact 103 both have disc-shaped portions protruding out of the corresponding conducting rods in the radial direction. The disc-shaped moving contact and the disc-shaped static contact are butted through respective side disc surfaces during closing, the side disc surfaces are called butting disc surfaces, the middle part of the butting disc surfaces is provided with a circular plane, the butting disc surfaces are annular inclined surfaces, namely conical surfaces, on the periphery of the circular plane, and the disc body part where the conical surfaces are located is a part protruding out of the conducting rod in the radial direction. A through hole is formed in the disc portion of the static contact 102, which protrudes radially from the static conductive rod 101, one end of the insulating tube is inserted into the through hole, and the other end of the insulating tube is fixedly connected to the static end cover plate 105 in a sealing manner and extends out of the static end cover plate 105. One end of the potential trigger electrode 114 installed in the insulating tube extends out of the insulating tube, penetrates through the through hole and is exposed out of an opening at one end of the through hole, which faces the movable contact 103, the end of the potential trigger electrode 114 is a discharge end, the other end of the potential trigger electrode 114 installed in the insulating tube extends out of the insulating tube, and the insulating tube and the potential trigger electrode 114 are in sealing fit with each other, so that sealing between the inner cavity of the sealed shell and the outside is guaranteed.

The discharge end protrudes out of the conical surface and is not higher than the circular plane, so that when the moving contact and the static contact are switched on and butted, the discharge end is positioned in a small gap between the conical surfaces of the moving contact and the static contact, and the potential trigger electrode 114 is not collided or impacted, and certainly, in other embodiments, if the discharge end is arranged to be flush with the butting end surface of the static contact 102, the discharge end is not arranged in a region where the circular plane of the static contact 102 is positioned or a region where the conical surface of the static contact 102 is positioned; alternatively, the fixed contact 102 may also be a circular cake-shaped structure, and the whole abutting end face is a circular plane.

Of course, in the present embodiment, it is preferable to dispose the potential triggering electrode 114 module at a position close to the static conductive rod 101 in order to more easily meet the electric field requirement in the arc extinguishing chamber.

An energy supply unit is connected to one end, located on the outer side of the fixed end cover plate 105, of the potential trigger electrode 114, at a required time, the control system controls the energy supply unit to provide high-voltage pulse current to the potential trigger electrode 114, the discharge end of the potential trigger electrode 114 can discharge towards the moving contact 103 on the opposite side and break down a space between the two, at this time, due to a high potential difference between the moving contact and the fixed contact, the fixed contact 102 can establish a breakdown path between the moving contact 103 and the fixed contact by means of the breakdown path between the potential trigger electrode 114 and the moving contact 103, so that the conduction of the moving contact and the fixed contact is realized, and further, the phase selection switching of the circuit breaker is realized.

In addition, the circuit breaker is switched on and off by alternating current, the potential trigger electrode 114 emits high-voltage high-frequency pulses, and optionally, when the potential trigger electrode 114 discharges, the polarity of the static contact 102 and the polarity of the potential trigger electrode 114 may be the same, or different, and may be both positive polarity and negative polarity, or one positive polarity and one negative polarity.

Preferably, in the present embodiment, as shown in fig. 1, the circuit breaker is configured with a multifunctional module 203 for the floating potential trigger electrode module 204. The multifunctional module 203 is connected with the control system and can transmit signals and transmit electric energy with the control system. The multifunctional module 203 is detachably mounted on the stationary end cover plate 105 of the arc extinguish chamber and is connected with the potential trigger electrode 114 module, the multifunctional module 203 comprises a wired or wireless charging unit and a battery module, the battery module can be charged through the charging unit, and the battery module can store energy to complete triggering within a certain time and times. When the wireless charging unit is adopted, the signal transceiver module arranged in the multifunctional module 203 is connected with the control system, so that a circuit does not need to be arranged, and the structure of the circuit breaker is simplified. Certainly, more optimally, the multifunctional module 203 further comprises a vacuum degree detection module, the vacuum degree detection module can detect the vacuum degree in the arc extinguish chamber, and when the potential trigger electrode 114 discharges, the control system controls the discharge parameters according to the vacuum degree condition in the arc extinguish chamber, so as to ensure that the breakdown path can be reliably established.

Through the introduction of the above embodiment, it can be known that the circuit breaker of the present invention can implement accurate phase selection switching through the potential trigger electrode 114 module, and avoid adverse effects on a power system caused by improper switching time and phase of a conventional circuit breaker.

The circuit breaker of the present invention is not limited to the above-described embodiments, and in other embodiments, the outer side of the potential trigger electrode module is coated with an insulating layer, so as to realize the insulating isolation between the potential trigger electrode and the static contact; the suspension potential trigger electrode module can also be configured corresponding to the moving contact, and needs to act synchronously with the moving contact at the moment, and the assembly mode, the position relation and the like between the suspension potential trigger electrode module and the arc extinguish chamber as well as between the suspension potential trigger electrode module and the moving contact assembly correspond to and are consistent with the assembly mode and the position relation between the suspension potential trigger electrode module and the arc extinguish chamber as well as between the suspension potential trigger electrode module and the fixed contact assembly introduced in the embodiment; in other embodiments, the potential trigger electrode may also be spirally arranged around the conductive rod of the corresponding contact, the discharge end is exposed from the contact, and the other end passes through the arc extinguish chamber from the tail of the conductive rod; in other embodiments, the contacts may be directly constituted by the ends of the conductive rod, the discharge ends of the potential trigger electrodes being at the edge positions of the ends of the conductive rod and being intended to discharge towards the opposite contact; in other embodiments, the arc extinguish chamber may be an arc extinguish chamber filled with insulating gas (sulfur hexafluoride or nitrogen), and at this time, the vacuum degree detection module of the multifunctional module may be replaced with a gas pressure detection module for detecting the gas pressure of the insulating gas.

The specific structure of the arc extinguish chamber of the present invention is the same as that of the arc extinguish chamber in the above-described various embodiments of the circuit breaker, and the detailed description thereof is omitted.

The above description is only a preferred embodiment of the present invention, and not intended to limit the present invention, the scope of the present invention is defined by the appended claims, and all structural changes that can be made by using the contents of the description and the drawings of the present invention are intended to be embraced therein.