CN218482182U

CN218482182U - Direct current moulded case circuit breaker

Info

Publication number: CN218482182U
Application number: CN202221916463.9U
Authority: CN
Inventors: 黄谢军; 蒋武山; 卢春荣; 孙吉升; 金建磊; 李学琳
Original assignee: Shanghai Liangxin Electrical Co Ltd; Huawei Digital Power Technologies Co Ltd
Current assignee: Shanghai Liangxin Electrical Co Ltd; Huawei Digital Power Technologies Co Ltd
Priority date: 2022-07-22
Filing date: 2022-07-22
Publication date: 2023-02-14
Anticipated expiration: 2032-07-22

Abstract

The application provides a direct-current molded case circuit breaker, which comprises a main body structure and a plugging and unplugging structure, wherein the main body structure and the plugging and unplugging structure are of an integrated structure; wherein the body structure comprises a flow divider; when the main body structure is connected with an external bus bar through the plugging structure, a conductive loop is formed; the current divider is used for collecting current signals on the conductive loop. Direct current moulded case circuit breaker is integral structure, and this integral structure divide into major structure and plug structure two parts, major structure connects plug structure's one end, and the other end of plug structure is used for connecting outside female arranging, and wherein, the shunt that is used for gathering current signal sets up in major structure, and the shunt does not occupy plug structure's inner space for plug structure inside can hold the structure that is used for providing quick plug function, has realized direct current moulded case circuit breaker's quick plug through plug structure.

Description

Direct current moulded case circuit breaker

Technical Field

The application relates to the technical field of circuit breakers, in particular to a direct-current molded case circuit breaker.

Background

The direct current molded case circuit breaker applied to the direct current power system can be internally provided with a shunt to realize the current collection function.

However, due to the requirement for miniaturization of the volume of the direct current molded case circuit breaker, the shunt for realizing the current collection function and the electronic circuit board for processing the collected current are generally packaged as an integral base together with the incoming line terminal and the outgoing line terminal, and the shunt and the electronic circuit board occupy most of the space of the integral base, so that when the incoming line terminal and the outgoing line terminal of the circuit breaker are connected with an external busbar, the circuit breaker can only be connected in a simple fixed connection manner (for example, through a bolt), and the circuit breaker cannot be plugged and unplugged quickly.

SUMMERY OF THE UTILITY MODEL

An object of the embodiment of the application is to provide a direct current moulded case circuit breaker for solve current direct current moulded case circuit breaker and encapsulate shunt and electronic circuit board and incoming line terminal, leading-out terminal as a whole base, make shunt and electronic circuit board occupy most of space of whole base, lead to the incoming line terminal, the leading-out terminal of circuit breaker when being connected with outside female arranging, can only be through simple fixed connection mode (for example bolted connection), can't realize the problem of the quick plug of circuit breaker.

The direct-current molded case circuit breaker comprises a main body structure and a plugging structure; the main body structure and the plugging structure are integrated;

the main body structure comprises a flow divider;

when the main body structure is connected with an external bus bar through the plugging structure, a conductive loop is formed;

the shunt is used for collecting current signals on the conductive loop.

Among the above-mentioned technical scheme, direct current moulded case circuit breaker is integrated structure, this integrated structure divide into major structure and plug structure two parts, major structure connects plug structure's one end, plug structure's the other end is used for connecting outside female arranging, wherein, a shunt for gathering current signal sets up in major structure, the shunt does not occupy plug structure's inner space for plug structure inside can hold the structure that is used for providing the quick plug function, direct current moulded case circuit breaker's quick plug has been realized through plug structure.

In one embodiment, the main body structure comprises a release, a moving contact system and an arc extinguishing system which are transversely and sequentially arranged, and the lower part of the main body structure is fixedly connected with the plug-in structure to form an integrated structure;

when the direct-current molded case circuit breaker is plugged, the main body structure moves along with the plugging structure.

Among the above-mentioned technical scheme, major structure and plug structure are the integral structure, make the circuit breaker when carrying out the plug, the major structure follows the plug structure motion, the circuit breaker that also is the integral structure is whole to be arranged with outside and carries out the plug, compare in frame-type circuit breaker (for example withdrawable circuit breaker), when carrying out the plug of frame-type circuit breaker, need earlier be arranged in the frame-type circuit breaker base and the external female row that is connected for the plug and arrange, shake into or shake out the base that is used for the plug with the circuit breaker body again, the integral structure of this embodiment is whole to be plugged and pulled the advantage that has embodied moulded case circuit breaker, the user can realize this direct current moulded case circuit breaker's plug through simple insertion or extract action.

In some optional embodiments, the body structure further comprises: the static contact system comprises a static contact conducting rod and a release, wherein the release is a thermomagnetic release comprising a thermal element;

wherein, the shunt is connected with the static contact conducting rod in series; alternatively, the shunt and the thermal element are connected in series.

In the technical scheme, the main body structure comprises a static contact system and a release, a static contact conducting rod is arranged in the static contact system, a thermal element is arranged in the release, the static contact conducting rod is connected with an outgoing line terminal of the plug-in structure, the thermal element is connected with an incoming line terminal of the plug-in structure, namely the thermal element is connected with a power supply, the static contact conducting rod is connected with a load, the shunt is arranged at the position of the static contact conducting rod or the thermal element, the layout is reasonable, and the space utilization rate inside the main body structure is improved.

In some alternative embodiments, the body structure further comprises a movable contact system;

the moving contact system comprises a soft connecting line, a moving contact conducting rod and a moving contact;

the moving contact conducting rod is connected with the thermal element through a soft connecting wire, and the moving contact is arranged at the end part of the moving contact conducting rod.

In the above technical scheme, when the moving contact is in contact with the static contact, the thermal element, the moving contact system and the static contact system form a conductive loop in the main body structure.

In some alternative embodiments, the thermal element comprises an upper stem and a lower stem;

one end of the flow divider is connected with the upper rod body through a first fastening piece, and the other end of the flow divider is connected with the lower rod body through a second fastening piece;

or one end face of the shunt is connected with the lower end face of the upper rod body, and the other end face of the shunt is connected with the upper end face of the lower rod body.

In one embodiment, the thermal element is divided into an upper rod and a lower rod, and the shunt is fixedly installed on the side surface of the thermal element when the dc molded case circuit breaker is assembled, and the installation manner includes, but is not limited to, bolting and welding. Inside the direct current moulded case circuit breaker, the space above the hot component is used for holding release and moving contact system etc. is the plug structure below the hot component, consequently, sets up the shunt in the side of hot component, and is rationally distributed, has improved the inside space utilization of major structure. In another embodiment, when the thermal element is produced, the shunt is integrated on the thermal element, that is, one end surface of the shunt is connected with the lower end surface of the upper rod body, and the other end surface of the shunt is connected with the upper end surface of the lower rod body, so that when the direct current molded case circuit breaker is assembled, the step flow of installing the shunt can be reduced, the assembly flow of the direct current molded case circuit breaker is simplified, and the assembly efficiency is improved.

In one embodiment, the static contact conducting rod is divided into an upper rod body and a lower rod body, and the shunt is fixedly installed on the side surface of the static contact conducting rod when the direct current molded case circuit breaker is assembled, wherein the installation mode includes but is not limited to bolting and welding. Inside the direct current moulded case circuit breaker, the space above the static contact conducting rod is used for holding release and moving contact system etc. and below the static contact conducting rod is plug structure, consequently, sets up the shunt in the side of static contact conducting rod, and is rationally distributed, has improved the inside space utilization of major structure. In another embodiment, when the static contact conducting rod is produced, the shunt is integrated on the static contact conducting rod, namely, one end face of the shunt is connected with the lower end face of the upper rod body, and the other end face of the shunt is connected with the upper end face of the lower rod body, so that the step flow of installing the shunt can be reduced when the direct-current molded case circuit breaker is assembled, the assembly flow of the direct-current molded case circuit breaker is simplified, and the assembly efficiency is improved.

In some alternative embodiments, the circuit breaker further includes an operating mechanism, an electronics board, and an external trip accessory; the external tripping accessory comprises a shunt tripping device or an undervoltage tripping device;

the electronic circuit board is electrically connected with the shunt, and is used for receiving the current signal and outputting a tripping instruction for indicating the external tripping accessory to execute a tripping action based on the current signal so as to trip the operating mechanism.

In some alternative embodiments, an electronic circuit board includes: a processor electrically connected to the shunt;

the processor is used for determining the current state of the direct current molded case circuit breaker according to the current signal and sending a tripping instruction to the external tripping accessory when the current state is determined to be an abnormal state.

In some alternative embodiments, the processor is specifically configured to:

extracting a current value according to the current signal;

judging whether the current value is larger than a current threshold value; and if so, determining that the current state is an abnormal state, and sending a tripping instruction to an external tripping accessory.

In some optional embodiments, the electronic circuit board further comprises:

a wireless communication module electrically connected with the processor; the wireless communication module is used for uploading the current signal and the current state to the server and receiving a tripping instruction obtained by the server based on the current signal and the current state.

In some optional embodiments, the electronic circuit board further comprises:

the display screen is connected with the processor; the display screen is used for locally displaying the current signal and/or the current state.

In some optional embodiments, the electronic circuit board further comprises:

the sound and light alarm device is connected with the processor; the sound-light alarm device is used for giving sound-light alarm when the current state is abnormal.

In some optional embodiments, further comprising:

the temperature acquisition circuit is used for acquiring the temperature of a temperature acquisition point in the circuit breaker;

wherein the temperature pick-up point comprises the position of the movable contact, and/or

Position of stationary contact system, and/or

Location of flexible connecting lines, and/or

The position of the thermal element, and/or the position of the conducting rod of the stationary contact, and/or the position of the conducting rod of the movable contact, and/or

The position of the processor, and/or the position of the external busbar;

the temperature acquisition circuit is electrically connected with the processor; the processor is also used for sending a tripping instruction to the external tripping accessory when the temperature of the temperature acquisition point reaches a preset tripping condition.

In some optional embodiments, the electronic circuit board further comprises a memory; the memory is used for storing the tripping condition of each temperature acquisition point corresponding to each current value;

the processor is also used for determining the current value according to the current signal, inquiring the current tripping condition corresponding to the temperature acquisition point according to the current value, and sending a tripping instruction to the external tripping accessory when the temperature of the temperature acquisition point reaches the current tripping condition.

In some optional embodiments, the static contact system further includes: a stationary contact and an arc striking plate;

the static contact conducting rod is connected with the static contact, and the arc striking piece is connected with the static contact.

In the above technical scheme, the static contact system includes a static contact, a static contact conducting rod and an arc striking plate which are connected with each other. Wherein, the function of striking the arc piece is: when the moving contact and the static contact are rapidly disconnected, the voltage between the moving contact and the static contact causes air medium to discharge so as to generate high-temperature electric arc, therefore, an arc extinguishing system is required to extinguish the arc, and the arc striking plates arranged at the corresponding positions of the arc extinguishing system can rapidly guide the electric arc.

In some optional embodiments, one end of the static contact conducting rod close to the static contact is provided with a U-shaped structural member, and the U-shaped structural member is used for providing a repulsive force to the moving contact conducting rod when an electric arc is generated between the moving contact and the static contact.

In the technical scheme, the moving contact system enables the moving contact to be contacted with the fixed contact by providing rotating force through the operating mechanism, and the U-shaped structural member is arranged on the fixed contact conducting rod and can provide extra repulsive force to the moving contact conducting rod when electric arcs are generated between the moving contact and the fixed contact, so that the moving contact and the fixed contact are quickly disconnected, and the response time is shortened.

In some optional embodiments, the U-shaped structural member and the static contact conducting rod are integrally formed.

In the technical scheme, the U-shaped structural part and the static contact conducting rod are of an integrally formed structure, that is, when the static contact conducting rod is produced, one end of the whole conducting rod can be stamped to form the U-shaped structure, the U-shaped structural part and the static contact conducting rod are not required to be welded, the integrally formed structure is high in strength, the hitting action of a movable contact when the movable contact is in contact with the static contact can be borne, and the service life is longer.

In some alternative embodiments, the plug structure includes a pair of bridge contacts; the bridge contact pair consists of a first bridge contact and a second bridge contact;

one end of the first bridge contact is inserted into the thermal element, and the other end of the first bridge contact is used for being inserted into an external bus;

one end of the second bridge-type contact is inserted into the static contact conducting rod, and the other end of the second bridge-type contact is used for being inserted into the external busbar.

In the above technical scheme, the plugging and unplugging function of the direct current molded case circuit breaker is realized through the bridge-type contact in the plugging and unplugging structure, the thermal element is connected with the power supply through the first bridge-type contact, and the static contact conducting rod is connected with the load through the second bridge-type contact, so that the first bridge-type contact, the thermal element, the soft connecting wire, the dynamic contact conducting rod, the dynamic contact, the static contact conducting rod and the second bridge-type contact are sequentially connected to form a conducting loop in the direct current molded case circuit breaker.

In some alternative embodiments, the bridge-type contact pair is disposed toward a bottom surface of the dc molded case circuit breaker.

Among the above-mentioned technical scheme, first bridge type contact and second bridge type contact all set up towards direct current moulded case circuit breaker direction of height, and bridge type contact is to being located direct current moulded case circuit breaker's bottom, that is to say, the direct current moulded case circuit breaker of this embodiment is the circuit breaker of bottom surface plug-in, when arranging direct current moulded case circuit breaker and outside to be connected, only need from the top down place direct current moulded case circuit breaker and insert outside female arranging can, the direct current moulded case circuit breaker's of being convenient for quick plug.

In some optional embodiments, the circuit breaker further comprises a release, an operating mechanism and an electronic circuit board, wherein the release is an electronic release; the electronic tripper comprises a conductive rod, a tripper base and a tripping executing mechanism, wherein the tripping executing mechanism of the electronic tripper is a magnetic flux converter;

the tripping actuating mechanism and the conducting rod are arranged on the base of the tripper; the shunt is connected with the conducting rod in series;

the electronic circuit board is electrically connected with the shunt, and is used for receiving the current signal and outputting a tripping instruction for instructing the tripping executing mechanism to execute a tripping action based on the current signal so as to trip the operating mechanism.

In one embodiment, when the operating mechanism is switched on, the moving contact system and the fixed contact system are closed, the conductive loop inside the direct-current molded case circuit breaker is switched on, and when current passes through the conductive loop, the current passes through the conductive rod, so that the shunt connected in series on the conductive rod correspondingly generates a feedback current signal, and the current signal is transmitted to the electronic circuit board through the auxiliary loop to realize the acquisition of the current signal. When the current passing through the conductive loop is abnormal, the electronic circuit board outputs a tripping instruction to the tripping executing mechanism, and the tripping executing mechanism executes tripping action to trip the operating structure, so that the movable contact and the fixed contact are separated, and the current in the direct current molded case circuit breaker is cut off.

In another embodiment, when the operating mechanism is switched on, the moving contact system and the fixed contact system are closed, the conductive loop inside the direct-current molded case circuit breaker is switched on, and when the conductive loop passes through current, the current passes through the fixed contact conductive rod, so that the shunt connected in series to the fixed contact conductive rod correspondingly generates a feedback current signal, and the current signal is transmitted to the electronic circuit board through the auxiliary loop to realize the acquisition of the current signal. When the current passing through the conductive loop is abnormal, the electronic circuit board outputs a tripping instruction to the tripping actuating mechanism, and the tripping actuating mechanism executes a tripping action to trip the operating structure, so that the movable contact and the fixed contact are separated, and the current in the direct current molded case circuit breaker is cut off.

In some alternative embodiments, an electronic circuit board comprises: a processor electrically connected to the shunt;

the processor is used for determining the current state of the direct current molded case circuit breaker according to the current signal and sending a tripping instruction to the tripping execution mechanism when the current state is determined to be an abnormal state.

In some optional embodiments, the processor is specifically configured to:

extracting a current value according to the current signal;

judging whether the current value is larger than a current threshold value; and if so, determining that the current state is an abnormal state, and sending a tripping instruction to the tripping executing mechanism.

In the above technical solution, the current threshold is configured in advance in the processor, and the configuration is performed by using an operation terminal connected to the processor, where the operation terminal includes a touch screen connected to the processor in communication, a server connected to the processor in communication, and the like. And when the processor receives the current signal, the current value of the current signal is compared with the corresponding current threshold, if the current value exceeds the threshold, the current in the conductive loop is considered to be abnormal, and the processor automatically executes to send a tripping instruction to the tripping execution mechanism.

In some optional embodiments, the electronic circuit board further comprises:

In the technical scheme, the electronic circuit board further performs data interaction with the server through the wireless communication module, can upload current signals and current states of switching-on, switching-off, current abnormity and the like to the server, can also send the data to the client side in the server so that an operator can perform remote control, and can also acquire data of a plurality of direct current molded case circuit breakers to perform data analysis so as to determine the current threshold value corresponding to the current value.

In some optional embodiments, the electronic circuit board further comprises:

In the technical scheme, the electronic circuit board is electrically connected with the display screen, and the instantaneous current value of the current signal and the current states of closing, opening, current abnormity and the like are displayed on the display screen, so that an operator can check the fault reason of the direct current molded case circuit breaker on site and timely check the fault reason.

In some optional embodiments, the electronic circuit board further comprises:

In the technical scheme, the processor is also connected with an audible and visual alarm device, and when the processor monitors abnormal states such as current abnormity and the like, the processor starts the audible and visual alarm device to perform audible and visual alarm to remind nearby maintenance managers to perform troubleshooting.

In some optional embodiments, further comprising:

Position of stationary contact system, and/or

Location of flexible connecting lines, and/or

The position of the conducting rod, and/or the position of the conducting rod of the fixed contact, and/or the position of the conducting rod of the movable contact, and/or

The position of the processor, and/or the position of the external busbar;

the temperature acquisition circuit is electrically connected with the processor; the processor is also used for sending a tripping instruction to the tripping executing mechanism when the temperature of the temperature acquisition point reaches a preset tripping condition.

In the above technical solution, the temperature acquisition circuit acquires the temperature of one or more temperature acquisition points in the dc molded case circuit breaker, and the positions of the temperature acquisition points include but are not limited to: the position of movable contact, the position of stationary contact, the position of flexible connecting wire, the position of conducting rod, the position of static contact conducting rod, the position of movable contact conducting rod, the position of treater and the position of external busbar. When the conductive loop of the direct current molded case circuit breaker is conducted, the temperature collection points are possible to have the possibility of temperature rise, and when the temperature of any one temperature collection point reaches the corresponding tripping condition, the temperature abnormality of the current direct current molded case circuit breaker is indicated, so that the processor sends a tripping instruction to the tripping executing mechanism.

the processor is also used for determining the current value according to the current signal, inquiring the current tripping condition corresponding to the temperature acquisition point according to the current value, and sending a tripping instruction to the tripping executing mechanism when the temperature of the temperature acquisition point reaches the current tripping condition.

In the above technical solution, the electronic circuit board further includes a memory, and the trip conditions of the temperature acquisition points corresponding to each current value range section stored in the memory may be in a form of a table, and the trip conditions of the temperature acquisition points corresponding to the current value range sections in the table may be configured, or data in the table may be modified and updated by the server. The direct-current molded case circuit breaker can be arranged in different direct-current power systems, the abnormal temperature condition can be identified according to the temperature change of the temperature acquisition point caused by different current values, the application range of the circuit breaker is expanded, and the abnormal temperature condition can be detected in various scenes.

Drawings

To more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments of the present application will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and that those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.

Fig. 1 is a structural diagram of a direct current molded case circuit breaker according to an embodiment of the present application;

fig. 2 is a structural diagram of a direct current molded case circuit breaker according to another embodiment of the present application;

fig. 3 is a structural diagram of a direct current molded case circuit breaker according to another embodiment of the present application;

fig. 4 is a structural diagram of a flow divider according to an embodiment of the present disclosure;

fig. 5 is a structural diagram of a flow divider according to another embodiment of the present application;

FIG. 6 is a schematic view showing the positions of a plurality of temperature collection points according to the present embodiment;

fig. 7 is a structural diagram of the temperature acquisition circuit provided in this embodiment.

Icon: 1-main body structure, 2-release, 2-1-thermal element, 2-2-release base, 2-3-release actuating mechanism, 2-4-conducting rod, 3-electronic circuit board, 4-external release accessory, 5-middle cover, 6-operating mechanism, 7-moving contact system, 7-1-flexible connecting wire, 7-2-moving contact conducting rod, 7-3-moving contact, 8-arc extinguishing system, 9-static contact system, 9-1-static contact, 9-2-arc striking sheet, 9-3-static contact conducting rod, 10-shunt, 11-bridge contact pair, 12-plug structure, 13-connector, 14-temperature acquisition circuit board, 15-flexible PCB, 16-display screen.

Detailed Description

The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.

The direct current molded case circuit breaker applied to the direct current power system can be internally provided with a shunt to realize the current collection function. However, due to the requirement for miniaturization of the volume of the dc molded case circuit breaker, the shunt for achieving the current collection function and the electronic circuit board for processing the collected current are usually packaged as an integral base together with the incoming line terminal and the outgoing line terminal, and the shunt and the electronic circuit board occupy most of the space of the integral base, so that the incoming line terminal and the outgoing line terminal of the circuit breaker can only be connected with the external busbar through a simple fixed connection mode (for example, bolt connection), and quick plugging and unplugging of the circuit breaker cannot be achieved.

Therefore, one or more embodiments of the present application provide a direct current molded case circuit breaker, which can also realize the quick plugging and unplugging of the circuit breaker while collecting the current signal of the conductive loop in the circuit breaker.

Referring to fig. 1, fig. 1 is a structural diagram of a direct current molded case circuit breaker according to an embodiment of the present disclosure, where the direct current molded case circuit breaker includes a main body structure 1 and a plug structure 12. The main body structure 1 and the plugging structure 12 are of an integrated structure. It should be clear that the main structure housing includes a closed chamber formed after fastening with the middle cover 5, and the chamber is used for accommodating the release 2, the arc extinguishing system 8 and the like.

When the main body structure 1 is connected with an external bus bar through the plugging structure 12, a conductive loop is formed. A shunt 10 is in turn included in the body structure 1, the shunt 10 being used to pick up a current signal on the conductive loop.

In the embodiment of the application, direct current moulded case circuit breaker is the integral structure, this integral structure divide into main structure 1 and plug structure 12 two parts, main structure 1 connects the one end of plug structure 12, the other end of plug structure 12 is used for connecting outside female arranging, wherein, a shunt 10 for gathering current signal sets up in main structure 1, shunt 10 does not occupy the inner space of plug structure 12, make plug structure 12 inside can hold the structure that is used for providing quick plug function, direct current moulded case circuit breaker's quick plug has been realized through plug structure 12.

It should be understood that, in some other embodiments, the shunt 10 may also be replaced by a hall device or other current collecting device, and when any embodiment of the present application is implemented by using a hall device or other current collecting device, it should be considered as an equivalent replacement.

In one embodiment, the main body structure 1 comprises a release 2, a moving contact system 7 and an arc extinguishing system 8 which are transversely arranged in sequence, and the lower part of the main body structure 1 is fixedly connected with the plugging structure 12 to form an integrated structure;

when the direct-current molded case circuit breaker is plugged, the main body structure 1 moves along with the plugging structure 12.

In this embodiment, major structure 1 and plug structure 12 are the integral structure, make the circuit breaker when carrying out the plug, major structure 1 follows plug structure 12 and moves, that is to say that the circuit breaker of integral structure is whole to be arranged with outside and carries out the plug, compare in frame-type circuit breaker (for example withdrawable circuit breaker), when carrying out the plug of frame-type circuit breaker, need be earlier with the base that is used for the plug in the frame-type circuit breaker with the female connection of arranging of outside, shake into or shake out the base that is used for the plug with the circuit breaker body again, the integral structure of this embodiment is whole to be plugged and pulled the advantage that has embodied moulded case circuit breaker, the user can realize this direct current moulded case circuit breaker's plug through simple insertion or extract action.

In some alternative embodiments, the main body structure 1 further comprises: a static contact system 9 comprising a static contact conducting rod 9-3 and a release 2 comprising a thermal element 2-1.

In this embodiment, shunt 10 is in series with thermal element 2-1. The static contact conducting rod 9-3 and the thermal element 2-1 are both arranged towards the height direction of the circuit breaker, the plug-in structure 12 is vertically inserted and connected with the plug-in structure 12, the space of the direct current molded case circuit breaker above the thermal element 2-1 is used for accommodating the release 2, the plug-in structure 12 is arranged below the thermal element 2-1, and the shunt 10 is arranged in more space around the side surface of the thermal element 2-1. The main body structure 1 comprises a static contact system 9 and a release 2, a static contact conducting rod 9-3 is arranged in the static contact system 9, a thermal element 2-1 is arranged in the release 2, the static contact conducting rod 9-3 is connected with an outlet terminal of the plug structure 12, the thermal element 2-1 is connected with an inlet terminal of the plug structure 12, namely, the thermal element 2-1 is connected with a power supply, and the static contact conducting rod 9-3 is connected with a load; or, the thermal element 2-1 is connected with an outlet terminal of the plug structure 12, that is, the thermal element 2-1 is connected with a load, and the static contact conductive rod 9-3 is connected with an inlet terminal of the plug structure 12, that is, the static contact conductive rod 9-3 is connected with a power supply; the shunt 10 is arranged at the position of the thermal element 2-1, so that the layout is reasonable, and the space utilization rate in the main body structure 1 is improved.

Referring to fig. 4, fig. 4 is a structural diagram of a shunt 10 according to an embodiment of the present disclosure, in which a heat element 2-1 includes an upper rod and a lower rod; one end of the shunt 10 is connected to the upper rod body through a first fastening member, the other end of the shunt 10 is connected to the lower rod body through a second fastening member, the first fastening member and the second fastening member are screws in the embodiment, through holes are formed in the joints of the upper rod body and the shunt 10, and through holes are formed in the joints of the lower rod body and the shunt 10.

In this embodiment, the shunt 10 is disposed on the side of the thermoelement 2-1; in this embodiment, the shunt 10 is fixedly installed at the side of the thermal element 2-1 when assembling the dc molded case circuit breaker, and the installation manner includes, but is not limited to, bolting and welding. In the direct current molded case circuit breaker, the space above the thermal element 2-1 is used for accommodating the release 2, the moving contact system 7 and the like, and the plugging structure 12 is arranged below the thermal element 2-1, so that the shunt 10 is arranged on the side surface of the thermal element 2-1, the layout is reasonable, and the space utilization rate in the main body structure 1 is improved.

Referring to fig. 5 and 5, which are block diagrams of a shunt 10 according to an embodiment of the present invention, a thermal element 2-1 is also divided into an upper rod and a lower rod, one end surface of the shunt 10 is connected to a lower end surface of the upper rod, and the other end surface of the shunt 10 is connected to an upper end surface of the lower rod, where the connection is usually welding.

In this embodiment, the shunt 10 is integrally formed with the thermoelement 2-1; in this embodiment, the shunt 10 is integrated on the thermal element 2-1 when the thermal element 2-1 is produced, so that the step flow of installing the shunt 10 can be reduced when the dc molded case circuit breaker is assembled, the assembly flow of the dc molded case circuit breaker is simplified, and the assembly efficiency is improved.

In some alternative embodiments, the body structure 1 further comprises a movable contact system 7. The moving contact system 7 comprises a flexible connecting line 7-1, a moving contact conducting rod 7-2 and a moving contact 7-3; the moving contact conducting rod 7-2 is connected with the thermal element 2-1 through a flexible connecting line 7-1, and the moving contact 7-3 is arranged at the end part of the moving contact conducting rod 7-2.

In the embodiment of the application, when the moving contact 7-3 is contacted with the fixed contact 9-1, the thermal element 2-1, the moving contact system 7 and the fixed contact system 9 form a conductive loop in the main body structure 1.

In some alternative embodiments, the trip unit 2 includes: a release base 2-2 and a release actuating mechanism 2-3; the circuit breaker further comprises an operating mechanism 6, an electronic circuit board 3 and an external trip accessory 4. The external tripping accessory 4 adopts a shunt release or an undervoltage release, and the electronic circuit board 3 outputs a tripping instruction to enable the shunt release or the undervoltage release to act to realize tripping.

The tripping actuating mechanism 2-3 is installed on the tripping device base 2-2. The tripper 2 is a thermomagnetic tripper, and the operating mechanism 6 is tripped by the tripping executing mechanism 2-3. When the electronic circuit board 3 outputs a tripping instruction, the external tripping accessory 4 is required to execute a tripping action. That is, the electronic circuit board 3 is electrically connected to the shunt 10, and the electronic circuit board 3 is configured to receive the current signal and output a trip instruction for instructing the external trip accessory 4 to perform a trip operation based on the current signal, so as to trip the operating mechanism 6.

In this embodiment, when the operating mechanism 6 is switched on, the moving contact system 7 and the static contact system 9 are closed, the conductive loop inside the dc molded case circuit breaker is switched on, and when a current passes through the conductive loop, the current passes through the thermal element 2-1, so that the shunt 10 connected in series to the thermal element 2-1 correspondingly generates a feedback current signal, and the current signal is transmitted to the electronic circuit board 3 through the auxiliary loop, thereby achieving the acquisition of the current signal. When the current passing through the conductive loop is abnormal, the electronic circuit board 3 outputs a tripping instruction to the external tripping accessory 4, and the external tripping accessory 4 executes a tripping action to trip the operation structure, so that the separation of the movable contact 7-3 and the static contact 9-1 is realized, and the current in the direct current molded case circuit breaker is cut off.

The external tripping attachment 4, for example a shunt release, can also be used simultaneously for external remote tripping.

It should be clear that the circuit breaker may not be equipped with an external trip accessory 4, and at this time, the electronic circuit board 3 transmits the collected current signal to the display screen 16 or to the outside.

The electronic circuit board 3 in the dc plastic case circuit breaker will be explained in detail in one or more embodiments below:

in some alternative embodiments, the electronic circuit board 3 comprises: and a processor electrically connected to the shunt 10, the processor being configured to determine a current state of the dc molded case circuit breaker according to the current signal, and to send a trip instruction to the external trip mechanism when the current state is determined to be an abnormal state.

The processor includes one or more (all mounted on the electronic circuit board 3), which may be an integrated circuit chip having signal processing capability. The Processor may be a general-purpose Processor, including a Central Processing Unit (CPU), a Micro Control Unit (MCU), a Network Processor (NP), or other conventional processors; the Processor may also be a dedicated Processor, including a Neural-Network Processing Unit (NPU), a Graphics Processing Unit (GPU), a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, a discrete Gate or transistor logic device, and a discrete hardware component. Also, when the number of processors is plural, some of them may be general-purpose processors, and the other may be special-purpose processors.

In some optional embodiments, the processor is specifically configured to: extracting a current value according to the current signal; judging whether the current value is larger than a current threshold value; and if so, determining that the current state is an abnormal state, and sending a tripping instruction to an external tripping mechanism.

In the embodiment of the application, the current threshold is configured in the processor in advance, and the configuration is performed through an operation terminal connected with the processor, wherein the operation terminal comprises a touch screen connected with the processor in a communication manner, a server connected with the processor in a communication manner, and the like. And when the processor receives the current signal, the current value of the current signal is compared with the corresponding current threshold, if the current value exceeds the threshold, the current in the conductive loop is considered to be abnormal, and a tripping instruction is automatically sent to an external tripping mechanism.

In some alternative embodiments, the electronic circuit board 3 further comprises: a wireless communication module electrically connected with the processor; the wireless communication module is used for uploading the current signal and the current state to the server and receiving a tripping instruction obtained by the server based on the current signal and the current state.

In the embodiment of the application, the electronic circuit board 3 further performs data interaction with the server through the wireless communication module, can upload current signals and current states of switching on, switching off, current abnormity and the like to the server, and can also send the data to the client side so as to facilitate remote control of an operator, and the server can also acquire data of a plurality of direct current molded case circuit breakers to perform data analysis so as to determine a current threshold corresponding to a current value.

In some alternative embodiments, the electronic circuit board 3 further comprises: a display screen 16 connected to the processor; the display screen 16 is used to locally display the current signal and/or the current status. In the embodiment of the present application, the electronic circuit board 3 is electrically connected to the display screen 16, and the instantaneous current value of the current signal and the current states of closing, opening, and abnormal current are displayed on the display screen 16, so that an operator can check the current instantaneous current value and the current states of closing, opening, and abnormal current on the site and timely check the fault cause of the dc molded case circuit breaker.

In some alternative embodiments, the electronic circuit board 3 further comprises: the sound and light alarm device is connected with the processor; the sound-light alarm device is used for giving sound-light alarm when the current state is abnormal. In the embodiment of the application, the processor is further connected with an audible and visual alarm device, and when the processor monitors abnormal states such as current abnormity and the like, the processor starts the audible and visual alarm device to perform audible and visual alarm to remind nearby maintenance managers to perform troubleshooting.

In some optional embodiments, the method further comprises: the temperature acquisition circuit is used for acquiring the temperature of a temperature acquisition point in the circuit breaker; wherein the temperature collection points comprise: the position of a movable contact 7-3, the position of a static contact 9-1 of a static contact system 9, the position of a flexible connecting line 7-1, the position of a thermal element 2-1, the position of a static contact conducting rod 9-3, the position of a movable contact conducting rod 7-2, the position of a processor, the position of an external busbar and the like. The temperature acquisition circuit is electrically connected with the processor; the processor is also used for sending a tripping instruction to the external tripping mechanism when the temperature of the temperature acquisition point reaches a preset tripping condition.

In the embodiment of the present application, the temperature acquisition circuit acquires the temperature of one or more temperature acquisition points in the dc molded case circuit breaker, and the positions of the temperature acquisition points include but are not limited to: the position of a moving contact 7-3, the position of a static contact 9-1, the position of a flexible connecting wire 7-1, the position of a thermal element 2-1, the position of a static contact conducting rod 9-3, the position of a moving contact conducting rod 7-2, the position of a processor and the position of an external busbar. When the conductive loop of the direct current molded case circuit breaker is conducted, the temperature collection points are possible to have the possibility of temperature rise, and when the temperature of any one temperature collection point reaches the corresponding tripping condition, the temperature abnormality of the current direct current molded case circuit breaker is indicated, so that the processor sends a tripping instruction to an external tripping mechanism.

Specifically, referring to fig. 6, fig. 6 is a schematic position diagram of a plurality of temperature collection points of the present embodiment, where a temperature collection point a is a position at the rear of the moving contact 7-3, a temperature collection point b is a position at the lower portion of the stationary contact 9-1, a temperature collection point c is a position at the stationary contact conductive rod 9-3, a temperature collection point d is a position at a conductive block in the trip connected to the flexible connecting line 7-1, a temperature collection point e is a position at the thermal element 2-1, and a temperature collection point f is a position at an external busbar connected to the bridge contact pair 8. The temperature acquisition circuit of the present embodiment is shown in fig. 7, and the temperature acquisition circuit includes a connector 13, a temperature acquisition circuit board 14, a flexible PCB15, and six NTC temperature sensors disposed at temperature acquisition points a-f, the six NTC temperature sensors are respectively connected to the connector 13 on the temperature acquisition circuit board 14 through wires, and the temperature acquisition circuit board 14 is connected to the electronic circuit board 3 through the flexible PCB15, so that temperature signals acquired by the NTC temperature sensors can be transmitted to a processor on the electronic circuit board 3, and are displayed to a maintenance person or a customer after being processed by the processor.

In some alternative embodiments, the electronic circuit board 3 further comprises a memory; the memory is used for storing the tripping condition of each temperature acquisition point corresponding to each current value; the processor is further configured to determine a current value according to the current signal, query a current tripping condition corresponding to the temperature acquisition point according to the current value, and send a tripping instruction to the external tripping accessory 4 when the temperature of the temperature acquisition point reaches the current tripping condition.

In the embodiment of the present application, the electronic circuit board 3 further includes a memory, and the trip condition of each temperature acquisition point corresponding to each current value range section stored in the memory may be in a form of a table, and the trip condition of the temperature acquisition point corresponding to the current value range section in the table may be configured, or data in the table may be modified and updated by a server. The direct-current molded case circuit breaker can be arranged in different direct-current power systems, the abnormal temperature condition can be identified according to the temperature change of the temperature acquisition point caused by different current values, the application range of the circuit breaker is expanded, and the abnormal temperature condition can be detected in various scenes.

Referring to fig. 2, fig. 2 is a structural diagram of a direct current molded case circuit breaker according to another embodiment of the present application, where the circuit breaker further includes a release 2, an operating mechanism 6 and an electronic circuit board 3, in this embodiment, the release 2 is an electronic release, and the release 2 includes a conductive rod 2-4, a release base 2-2 and a release executing mechanism 2-3; the tripping executing mechanism 2-3 and the conducting rod 2-4 are arranged on the base 2-2 of the tripper; the shunt 10 is connected with the conducting rods 2-4 in series; the electronic circuit board 3 is electrically connected with the shunt 10, and the electronic circuit board 3 is used for receiving the current signal and outputting a tripping instruction for instructing the tripping executing mechanism 2-3 to execute a tripping action based on the current signal so as to trip the operating mechanism 6. In this embodiment, the tripping actuator 2-3 of the electronic trip unit is a magnetic flux converter.

In one embodiment, when the operating mechanism 6 is switched on, the moving contact system 7 and the static contact system 9 are closed, the internal conductive loop of the dc molded case circuit breaker is switched on, and when current passes through the conductive loop, the current passes through the conductive rods 2-4, so that the shunts 10 connected in series to the conductive rods 2-4 correspondingly generate feedback current signals, and the current signals are transmitted to the electronic circuit board 3 through the auxiliary loop to realize the collection of the current signals. When the current passing through the conductive loop is abnormal, the electronic circuit board 3 outputs a tripping instruction to the tripping executing mechanism 2-3, and the tripping executing mechanism 2-3 executes a tripping action to trip the operating structure, so that the movable contact 7-3 and the fixed contact 9-1 are separated, and the current in the direct current molded case circuit breaker is cut off. At this time, the electronic circuit board 3 does not output a trip command to the external trip accessory 4, and in one embodiment, the circuit breaker includes the external trip accessory 4, and then the external trip accessory 4 (e.g., shunt trip) is used for external remote tripping. In another embodiment, the external trip accessory 4 may not be installed in the circuit breaker.

In some alternative embodiments, the electronic circuit board 3 comprises: a processor electrically connected to the shunt 10;

the processor is used for determining the current state of the direct current molded case circuit breaker according to the current signal and sending a tripping instruction to the tripping executing mechanism 2-3 when the current state is determined to be an abnormal state.

In some optional embodiments, the processor is specifically configured to:

extracting a current value according to the current signal;

judging whether the current value is larger than a current threshold value; if yes, determining that the current state is an abnormal state, and sending a tripping instruction to the tripping executing mechanism 2-3.

In the above technical solution, the current threshold is configured in the processor in advance, and the configuration is performed through an operation terminal connected to the processor, where the operation terminal includes a touch screen connected to the processor in communication, a server connected to the processor in communication, and the like. And when the processor receives the current signal, the current value of the current signal is compared with the corresponding current threshold, if the current value exceeds the threshold, the current in the conductive loop is considered to be abnormal, and the processor automatically executes to send a tripping instruction to the tripping executing mechanism 2-3.

In some alternative embodiments, the electronic circuit board 3 further comprises:

In the above technical solution, the electronic circuit board 3 further performs data interaction with the server through the wireless communication module, and can upload the current signal and the current states of closing, opening, current abnormality, and the like to the server, and the server can also send the data to the client side so as to facilitate remote control of an operator, and the server can also collect data of a plurality of direct current molded case circuit breakers, perform data analysis, and determine the current threshold corresponding to the current value.

a display screen 16 connected to the processor; the display screen 16 is used to locally display the current signal and/or the current status.

In the above technical solution, the electronic circuit board 3 is electrically connected to the display screen 16, and the instantaneous current value of the current signal and the current states of closing, opening, and abnormal current are displayed on the display screen 16, so that an operator can check the current value and the current state of closing, opening, and abnormal current on the site, and the operator can timely check the fault cause of the dc molded case circuit breaker.

the sound and light alarm device is connected with the processor; the sound-light alarm device is used for giving sound-light alarm when the current state is an abnormal state.

In some optional embodiments, further comprising: the temperature acquisition circuit is used for acquiring the temperature of a temperature acquisition point in the circuit breaker; the temperature acquisition point comprises the position of a movable contact 7-3, and/or the position of a stationary contact 9-1 of a stationary contact system 9, and/or the position of a flexible connecting line 7-1, and/or the position of a conducting rod 2-4, and/or the position of a stationary contact conducting rod 9-3, and/or the position of a movable contact conducting rod 7-2, and/or the position of a processor, and/or the position of an external busbar;

the temperature acquisition circuit is electrically connected with the processor; the processor is also used for sending a tripping instruction to the tripping executing mechanism 2-3 when the temperature of the temperature acquisition point reaches a preset tripping condition.

In the above technical solution, the temperature acquisition circuit acquires the temperature of one or more temperature acquisition points in the dc molded case circuit breaker, and the positions of the temperature acquisition points include but are not limited to: the position of a movable contact 7-3, the position of a static contact 9-1, the position of a flexible connecting wire 7-1, the position of a conducting rod 2-4, the position of a static contact conducting rod 9-3, the position of a movable contact conducting rod 7-2, the position of a processor and the position of an external busbar. When the conductive loop of the direct current molded case circuit breaker is conducted, the temperature acquisition points are possible to have the possibility of temperature rise, and when the temperature of any one temperature acquisition point reaches the corresponding tripping condition, the current direct current molded case circuit breaker is indicated to have the condition of temperature abnormity, so that the processor sends a tripping instruction to the tripping executing mechanism 2-3.

In some alternative embodiments, the electronic circuit board 3 further comprises a memory; the memory is used for storing the tripping condition of each temperature acquisition point corresponding to each current value;

the processor is also used for determining the current value according to the current signal, inquiring the current tripping condition corresponding to the temperature acquisition point according to the current value, and sending a tripping instruction to the tripping executing mechanism 2-3 when the temperature of the temperature acquisition point reaches the current tripping condition.

In the above technical solution, the electronic circuit board 3 further includes a memory, and the trip condition of each temperature acquisition point corresponding to each current value range section stored in the memory may be in a form of a table, and the trip condition of the temperature acquisition point corresponding to the current value range section in the table may be configured, or data in the table may be modified and updated by a server. The direct-current molded case circuit breaker can be arranged in different direct-current power systems, the abnormal temperature condition can be identified according to the temperature change of the temperature acquisition point caused by different current values, the application range of the circuit breaker is expanded, and the abnormal temperature condition can be detected in various scenes.

Wherein the conductive rods 2-4 are divided into an upper rod and a lower rod, and in one embodiment, one end of the shunt 10 is connected to the upper rod of the conductive rods 2-4 through a first fastening member, and the other end of the shunt 10 is connected to the lower rod of the conductive rods 2-4 through a second fastening member. In another embodiment one end face of the shunt 10 is connected to the lower end face of the upper leg of the conductor bars 2-4 and the other end face of the shunt 10 is connected to the upper end face of the lower leg of the conductor bars 2-4.

Referring to fig. 3, fig. 3 is a diagram of a dc molded case circuit breaker according to another embodiment of the present application. The direct current molded case circuit breaker of this embodiment has major structure 1 and plug structure 12 equally, and major structure 1 and plug structure 12 are integrated structure. When the main body structure 1 is connected with an external bus bar through the plugging structure 12, a conductive loop is formed. A shunt 10 is in turn included in the body structure 1, the shunt 10 being used to pick up a current signal on the conductive loop. The one end of plug structure 12 is connected to major structure 1, and the other end of plug structure 12 is used for connecting outside female arranging, and wherein, the shunt 10 for gathering current signal sets up in major structure 1, and shunt 10 does not occupy the inner space of plug structure 12 for plug structure 12 is inside can hold the structure that is used for providing the quick plug function, has realized the quick plug of direct current moulded case circuit breaker through plug structure 12.

The body structure 1 further includes: the static contact system 9 comprises a static contact conducting rod 9-3 and the release 2 comprises a thermal element 2-1, wherein the shunt 10 is connected with the static contact conducting rod 9-3 in series.

In this embodiment, when the dc molded case circuit breaker is assembled, the shunt 10 is fixedly mounted on the side surface of the static contact conducting rod 9-3, and the mounting manner includes, but is not limited to, bolt connection and welding. In the direct-current molded case circuit breaker, the space above the static contact conducting rod 9-3 is used for a movable contact system 7, an arc extinguishing system 8 and the like, and the plugging structure 12 is arranged below the static contact conducting rod 9-3, so that the shunt 10 is arranged on the side face of the static contact conducting rod 9-3, the layout is reasonable, and the space utilization rate in the main body structure 1 is improved.

Similarly, the main structure 1 further comprises a moving contact system 7; the moving contact system 7 comprises a soft connecting wire 7-1, a moving contact conducting rod 7-2 and a moving contact 7-3; the moving contact conducting rod 7-2 is connected with the thermal element 2-1 through a flexible connecting line 7-1, and the moving contact 7-3 is arranged at the end part of the moving contact conducting rod 7-2. When the moving contact 7-3 is in contact with the stationary contact 9-1, the thermal element 2-1, the moving contact system 7 and the stationary contact system 9 form a conductive loop within the body structure 1.

The static contact conductive rod 9-3 is divided into an upper rod and a lower rod, and in one embodiment, one end of the shunt 10 is connected to the upper rod of the static contact conductive rod 9-3 through a first fastening member, and the other end of the shunt 10 is connected to the lower rod of the static contact conductive rod 9-3 through a second fastening member. In another embodiment, one end surface of the shunt 10 is connected to the lower end surface of the upper rod body of the static contact conductive rod 9-3, and the other end surface of the shunt 10 is connected to the upper end surface of the lower rod body of the static contact conductive rod 9-3. The release 2 of this embodiment is the thermomagnetic release, and release 2 still includes: a release base 2-2 and a release actuating mechanism 2-3; the circuit breaker further comprises an operating mechanism 6, an electronic circuit board 3 and an external trip accessory 4. The tripping actuator 2-3 and the electronic circuit board 3 are arranged on the tripping device base 2-2; the electronic circuit board 3 is electrically connected with the shunt 10, and the electronic circuit board 3 is used for receiving the current signal and outputting a tripping instruction for instructing the external tripping accessory 4 to execute a tripping action based on the current signal so as to trip the operating mechanism 6.

In this embodiment, when the operating mechanism 6 is switched on, the moving contact system 7 and the static contact system 9 are closed, the internal conductive loop of the dc molded case circuit breaker is switched on, and when a current passes through the conductive loop, the current passes through the static contact conductive rod 9-3, so that the shunt 10 connected in series to the static contact conductive rod 9-3 generates a feedback current signal correspondingly, and the current signal is transmitted to the electronic circuit board 3 through the auxiliary loop, thereby achieving the acquisition of the current signal. When the current passing through the conductive loop is abnormal, the electronic circuit board 3 outputs a tripping instruction to the external tripping accessory 4, the external tripping accessory 4 executes a tripping action to trip the operation structure, so that the movable contact 7-3 and the fixed contact 9-1 are separated, and the current in the direct current molded case circuit breaker is cut off.

In some optional embodiments, the static contact system 9 further includes: a stationary contact 9-1 and an arc striking plate 9-2; the static contact conducting rod 9-3 is connected with the static contact 9-1, and the arc striking piece 9-2 is connected with the static contact 9-1. In the embodiment of the present application, the static contact system 9 includes a static contact 9-1, a static contact conducting rod 9-3, and an arc tab 9-2, which are connected to each other. Wherein, the function of the arc striking piece 9-2 is as follows: when the moving contact and the static contact are rapidly disconnected, the voltage between the moving contact and the static contact causes air medium discharge to generate high-temperature electric arc, so that the arc extinguishing system 8 is required to extinguish the arc, and the arc striking plate 9-2 arranged at the corresponding position of the arc extinguishing system 8 can rapidly guide the electric arc.

In this embodiment, a U-shaped structural member is disposed at an end of the static contact conducting rod 9-3 close to the static contact 9-1, and the U-shaped structural member is used for providing a repulsive force to the moving contact conducting rod 7-2 when an arc is generated between the moving contact 7-3 and the static contact 9-1. Because the moving contact system 7 provides a rotating force through the operating mechanism 6 to enable the moving contact 7-3 to be contacted with the fixed contact 9-1, and the U-shaped structural member is arranged on the fixed contact conducting rod 9-3, additional repulsive force to the moving contact conducting rod 7-2 can be provided when electric arcs are generated between the moving contact 7-3 and the fixed contact 9-1, so that the moving contact 7-3 and the fixed contact 9-1 are quickly disconnected, and the response time is shortened.

In some alternative embodiments, the U-shaped structural member may be a structure integrally formed with the static contact conductive rod 9-3. That is to say, when the static contact conducting rod 9-3 is produced, one end of the whole conducting rod 2-4 can be punched to form a U-shaped structure, the U-shaped structural member and the static contact conducting rod 9-3 do not need to be welded, and the integrally formed structure has high strength, can bear striking actions of the movable contact 7-3 when contacting with the static contact 9-1 for more times, and has a longer service life.

In one or more of the following embodiments, the plugging structure 12 of the dc plastic case circuit breaker is described in detail:

in some alternative embodiments, the plugging structure 12 comprises a bridge-type contact pair 11; the bridge contact pair 11 consists of a first bridge contact and a second bridge contact; one end of the first bridge contact is inserted into the thermal element 2-1, and the other end of the first bridge contact is inserted into an external bus bar; one end of the second bridge-shaped contact is inserted into the static contact conducting rod 9-3, and the other end of the second bridge-shaped contact is inserted into the external busbar.

In the embodiment of the application, the plugging structure 12 realizes the plugging function of the dc molded case circuit breaker by the bridge-type contact, the thermal element 2-1 is connected to the power supply through the first bridge-type contact, and the static contact conducting rod 9-3 is connected to the load through the second bridge-type contact, so that the first bridge-type contact, the thermal element 2-1, the soft connection line 7-1, the dynamic contact conducting rod 7-2, the dynamic contact 7-3, the static contact 9-1, the static contact conducting rod 9-3 and the second bridge-type contact are sequentially connected to form a conducting loop in the dc molded case circuit breaker.

In some alternative embodiments, the pair of bridge-type contacts 11 is disposed toward the bottom surface of the dc molded case circuit breaker. In this application embodiment, first bridge type contact and second bridge type contact all set up towards direct current moulded case circuit breaker direction of height, and bridge type contact is located direct current moulded case circuit breaker's bottom to 11, that is to say, the direct current moulded case circuit breaker of this embodiment is the circuit breaker of bottom surface plug-in, when arranging direct current moulded case circuit breaker and outside to be connected, only need from the top down place direct current moulded case circuit breaker and insert outside female arranging can, the quick plug of direct current moulded case circuit breaker of being convenient for.

In the embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units is only one logical division, and there may be other divisions when actually implemented, and for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection of devices or units through some communication interfaces, and may be in an electrical, mechanical or other form.

In addition, units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional modules in the embodiments of the present application may be integrated together to form an independent part, or each module may exist alone, or two or more modules may be integrated to form an independent part.

In this document, 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.

The above description is only an example of the present application and is not intended to limit the scope of the present application, and various modifications and changes may be made to the present application by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A direct current molded case circuit breaker is characterized by comprising a main body structure (1) and a plugging structure (12), wherein the main body structure (1) and the plugging structure (12) are of an integrated structure,

the body structure (1) comprises a flow divider (10);

when the main body structure (1) is connected with an external busbar through the plugging structure (12), a conductive loop is formed;

wherein the current divider (10) is used for collecting current signals on the conductive loop.

2. The direct current molded case circuit breaker according to claim 1, wherein the main body structure (1) further comprises: a static contact system (9) comprising a static contact conductive rod (9-3) and a release (2) comprising a thermal element (2-1);

the shunt (10) is connected with the static contact conducting rod (9-3) in series; or

The shunt (10) is connected in series with the thermal element (2-1).

3. A direct current molded case circuit breaker according to claim 2, characterized in that said main body structure (1) further comprises a movable contact system (7);

the moving contact system (7) comprises a flexible connecting line (7-1), a moving contact conducting rod (7-2) and a moving contact (7-3);

the moving contact conducting rod (7-2) is connected with the thermal element (2-1) through the soft connecting wire (7-1), and the moving contact (7-3) is arranged at the end part of the moving contact conducting rod (7-2).

4. The direct current molded case circuit breaker of claim 3,

the thermal element (2-1) comprises an upper rod body and a lower rod body;

one end of the flow divider (10) is connected with the upper rod body through a first fastening piece, and the other end of the flow divider (10) is connected with the lower rod body through a second fastening piece;

or one end face of the flow divider (10) is connected with the lower end face of the upper rod body, and the other end face of the flow divider (10) is connected with the upper end face of the lower rod body.

5. A direct current molded case circuit breaker according to claim 3, characterized in that the circuit breaker further comprises an operating mechanism (6), an electronic circuit board (3) and an external trip accessory (4);

the electronic circuit board (3) is electrically connected with the shunt (10), and the electronic circuit board (3) is used for receiving the current signal and outputting a tripping instruction for instructing the external tripping accessory (4) to execute a tripping action based on the current signal so as to trip the operating mechanism (6).

6. The direct current molded case circuit breaker according to claim 5, wherein the electronic circuit board (3) comprises: a processor electrically connected to the shunt (10); the processor is used for acquiring a current signal of the current divider and sending a tripping instruction to the external tripping accessory (4).

7. The direct current molded case circuit breaker according to claim 6, wherein the electronic circuit board (3) further comprises:

a wireless communication module electrically connected with the processor; the wireless communication module is used for uploading the current signal and the current state to a server and receiving the tripping instruction obtained by the server based on the current signal and the current state.

8. The direct current molded case circuit breaker according to claim 6, wherein the electronic circuit board (3) further comprises:

a display screen (16) connected to the processor; the display screen (16) is used for locally displaying the current signal and/or the current state.

9. The direct current molded case circuit breaker according to claim 6, wherein the electronic circuit board (3) further comprises:

the sound and light alarm device is connected with the processor; the sound and light alarm device is used for giving sound and light alarm when the current state is an abnormal state.

10. The direct current molded case circuit breaker of claim 6, further comprising:

wherein the temperature pick-up point comprises the position of the movable contact (7-3), and/or

The position of a stationary contact (9-1) of the stationary contact system (9), and/or

The position of the flexible connecting line (7-1), and/or

The position of the thermal element (2-1), and/or the position of the static contact conducting rod (9-3), and/or the position of the movable contact conducting rod (7-2), and/or

The position of the processor, and/or the position of an external busbar;

the temperature acquisition circuit is electrically connected with the processor; the processor is also used for sending the tripping instruction to the external tripping accessory (4) when the temperature of the temperature acquisition point reaches a preset tripping condition.

11. A direct current molded case circuit breaker according to claim 10, characterized in that said electronic circuit board (3) further comprises a memory; the memory is used for storing the tripping condition of each temperature acquisition point corresponding to each current value.

12. A direct current molded case circuit breaker according to claim 3, characterized in that said static contact system (9) further comprises: a static contact (9-1) and an arc striking sheet (9-2);

the static contact conducting rod (9-3) is connected with the static contact (9-1), and the arc striking plate (9-2) is connected with the static contact (9-1).

13. The direct current molded case circuit breaker according to claim 12, wherein an end of the fixed contact conducting rod (9-3) near the fixed contact (9-1) is provided with a U-shaped structural member for providing a repulsive force to the movable contact conducting rod (7-2) when an arc is generated between the movable contact (7-3) and the fixed contact (9-1).

14. The dc molded case circuit breaker of claim 13, wherein the U-shaped structural member and the static contact conductive rod (9-3) are integrally formed.

15. A direct current molded case circuit breaker according to any of claims 2 to 14, characterized in that said plug structure (12) comprises a pair of bridge-type contacts (11); the bridge contact pair (11) consists of a first bridge contact and a second bridge contact;

one end of the first bridge-type contact is inserted into the thermal element (2-1), and the other end of the first bridge-type contact is used for being inserted into an external busbar;

one end of the second bridge-shaped contact is inserted into the static contact conducting rod (9-3), and the other end of the second bridge-shaped contact is inserted into an external bus;

the bridge-type contact pair (11) is arranged towards the bottom surface of the direct-current molded case circuit breaker.

16. The direct current molded case circuit breaker according to claim 1, wherein the main body structure (1) comprises a release (2), a movable contact system (7) and an arc extinguishing system (8) which are arranged in sequence in a transverse direction, and the lower part of the main body structure (1) is fixedly connected with the plugging structure (12) to form the integrated structure;

when the direct-current molded case circuit breaker is plugged, the main body structure (1) moves along with the plugging structure (12).

17. The direct current molded case circuit breaker according to claim 1, further comprising a release (2), an operating mechanism (6) and an electronic circuit board (3); the tripper (2) comprises a conducting rod (2-4), a tripper base (2-2) and a tripper actuating mechanism (2-3);

the tripping actuator (2-3) and the conducting rod (2-4) are arranged on the tripper base (2-2); the shunt (10) is connected with the conducting rod (2-4) in series;

the electronic circuit board (3) is electrically connected with the shunt (10), and the electronic circuit board (3) is used for receiving the current signal and outputting a tripping instruction for instructing the tripping executing mechanism (2-3) to execute a tripping action based on the current signal so as to trip the operating mechanism (6).