CN218782945U - Double-power-supply circuit and circuit breaker - Google Patents

Abstract

The embodiment of the application provides a double power supply circuit and a circuit breaker. Wherein, two supply circuit include: a shunt, a first conductive member, and a second conductive member; the first end of the shunt is connected with the moving contact, and the second end of the shunt is connected with the first position of the printed circuit board PCB; the first end of the first conductive piece is connected with the second position of the PCB, and the second end of the first conductive piece is connected with the fixed contact; the first end of the second conductive piece is connected with the conductive plate, and the second end of the second conductive piece is connected with the third position of the PCB; when the main power supply supplies power, the main power supply, the shunt, the PCB, the second conductive piece and the conductive plate form a first power supply loop; when the auxiliary power supply supplies power, the auxiliary power supply, the first conductive piece, the PCB, the second conductive piece and the conductive plate form a second power supply loop. The double-power-supply circuit provided by the embodiment of the application can still work normally when the power supply is abnormal.

Description

Double-power-supply circuit and circuit breaker

Technical Field

The embodiment of the application relates to the technical field of electricity, in particular to a double-power-supply circuit and a circuit breaker.

Background

The electrical equipment covers the aspects of life and industry, and plays a key role in the improvement of science and technology and the development of the life level and the industrial level. Generally, the circuit is driven by a power supply to control the electrical equipment to realize various functions, so that the circuit needs to be ensured to work normally in order to ensure the normal work of the electrical equipment.

In some cases, for example, when the current of the circuit is large, short circuit occurs at a high load of the circuit, and damage to the electrical equipment may be caused. To prevent this, a circuit breaker is generally provided in the circuit for load protection. The circuit breaker can cut off the circuit in time when the current of circuit exceeds the rated value, avoids circuit or electrical equipment to take place to damage.

Therefore, the circuit breaker has high importance in the normal operation of electrical equipment and circuits, but it is not negligible that the circuit breaker itself needs power supply to supply power to the circuit breaker to normally operate, and when the circuit has an overcurrent phenomenon, the power supply of the circuit breaker is also affected. Therefore, how to ensure that the circuit breaker can still work normally when the power supply is abnormal is a problem to be solved urgently.

SUMMERY OF THE UTILITY MODEL

In view of the above problem, the embodiment of the present application provides a dual power supply circuit and a circuit breaker, which can ensure that the circuit breaker can still work normally when power supply is abnormal.

In a first aspect, an embodiment of the present application provides a dual power supply circuit, including:

the first end of the shunt is connected with the moving contact, and the second end of the shunt is connected with the first position of the Printed Circuit Board (PCB);

the first end of the first conductive piece is connected with the second position of the PCB, and the second end of the first conductive piece is connected with the fixed contact;

the first end of the second conductive piece is connected with the conductive plate, and the second end of the second conductive piece is connected with the third position of the PCB;

when the main power supply supplies power, the main power supply, the shunt, the PCB, the second conductive piece and the conductive plate form a first power supply loop;

when the auxiliary power supply supplies power, the auxiliary power supply, the first conductive piece, the PCB, the second conductive piece and the conductive plate form a second power supply loop.

In one possible implementation, the first conductive member is configured to detect a first voltage signal on the PCB at the second position when the main power source is supplying power.

In one possible implementation, the shunt is configured to detect a second voltage signal on the PCB at the first location when the auxiliary power supply is powered.

In a possible implementation manner, the first conductive member is a torsion spring, a first torsion arm of the torsion spring is connected with the second position, and a second torsion arm of the torsion spring is connected with the fixed contact.

In a possible implementation, the second electrically conductive piece is the torsional spring, and the first torque arm and the current conducting plate of torsional spring are connected, and the second torque arm and the third position of torsional spring are connected.

In one possible implementation, the second location is configured as a PCB conductive pin; the first torsion arm of the torsion spring is abutted against the PCB conductive pin.

In one possible implementation, the third location is configured as a PCB conductive pin; the second torque arm of the torsion spring is abutted against the PCB conductive pin.

In one possible implementation manner, the first conductive member is a lead, a first end of the lead is connected with the second position, and a second end of the lead is connected with the fixed contact; and/or the second conductive piece is a lead wire, the first end of the lead wire is connected with the conductive plate, and the second end of the lead wire is connected with the third position.

In a second aspect, an embodiment of the present application provides a circuit breaker, including: the dual supply circuit of any one of the first to fourth aspects above.

In one possible implementation, the circuit breaker is a plug-in circuit breaker.

The embodiment of the application provides a double power supply circuit and circuit breaker, through setting up three positions on PCB, and be connected the primary importance with the main power supply, the second place is connected with auxiliary power supply, the third place all has with main power supply and auxiliary power supply to be connected, can appear when unusual in the power of current power supply, switch to another power and supply power, thereby guarantee the circuit breaker to have the electricity all the time through setting up two kinds of power supply circuit, can not receive the power failure, the influence of insufficient voltage etc., guarantee the circuit breaker still can normally work when the power supply is unusual. And when the main power supply or the auxiliary power supply supplies power, the opening and closing state of the circuit breaker can be judged by monitoring the voltage signal of the PCB.

The foregoing description is only an overview of the technical solutions of the embodiments of the present application, and the embodiments of the present application can be implemented according to the content of the description in order to make the technical means of the embodiments of the present application more clearly understood, and the detailed description of the present application is provided below in order to make the foregoing and other objects, features, and advantages of the embodiments of the present application more clearly understandable.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic cross-sectional view of a circuit breaker according to an embodiment of the present application.

Fig. 2 is a schematic partial structural diagram of a circuit breaker according to an embodiment of the present application.

Fig. 3 is a partial schematic structural diagram corresponding to another angle in fig. 2 according to an embodiment of the present application.

Reference numerals:

1. a circuit breaker; 10. a flow divider; 101. a first end of the flow splitter; 102. a second end of the diverter;

103. a third end of the shunt; 104. a fourth end of the flow splitter;

20. a first conductive member; 201. a first end of a first conductive member; 202. a second end of the first conductive member;

30. a second conductive member; 301. a first end of a second conductive member; 302. a second end of a second conductive member;

40. a moving contact; 41. static contact; 42. a conductive plate; 43. a thin lead; 44. a PCB;

441. a first position; 442. a second position; 443. a third position; 444. a fourth position;

45. a torsion spring; 451. a first torque arm; 452. a second torque arm; 46. a conductive pin; 47. a static arc ignition angle; 2. a positive bus bar end; 3. a negative bus bar end.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having," and any variations thereof, in the description and claims of this application and the description of the figures are intended to cover non-exclusive inclusions.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase "an embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

The term "and/or" herein is merely an association relationship describing an associated object, and means that there may be three relationships, for example, a and/or B, which may mean: there are three cases of A, both A and B, and B. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

Furthermore, the terms "first," "second," and the like in the description and claims of the present application or in the above-described drawings are used for distinguishing between different objects and not necessarily for describing a particular sequential order, and may explicitly or implicitly include one or more of the features.

In the description of the present application, unless otherwise specified, "plurality" means two or more (including two), and similarly, "plural" means two or more (including two).

In the description of the present application, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., "connected" or "connected" of a mechanical structure may refer to a physical connection, e.g., a physical connection may be a fixed connection, e.g., a fixed connection by a fastener, such as a screw, bolt, or other fastener; the physical connection can also be a detachable connection, such as a mutual snap-fit or snap-fit connection; the physical connection may also be an integral connection, for example, a connection formed by welding, bonding or integral molding. "connected" or "connected" of circuit structures may mean not only physically connected but also electrically connected or signal-connected, for example, directly connected, i.e., physically connected, or indirectly connected through at least one intervening component, as long as the circuits are in communication, or communication between the interiors of two components; signal connection may refer to signal connection through a medium, such as radio waves, in addition to signal connection through circuitry. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

The electrical equipment covers the aspects of life and industry, and plays a key role in the improvement of science and technology and the development of the life level and the industrial level. The circuit in the electrical equipment is driven by the power supply to control the operation of each part of the electrical equipment so as to realize various functions. Therefore, in order to ensure the normal operation of the electrical equipment, it is necessary to ensure that the circuit for controlling the operation of the electrical equipment can operate normally.

In some cases, for example, when the current of the circuit is large, short circuits occur at a high load of the circuit, and damage to the electrical equipment may be caused. To prevent this, a circuit breaker is generally provided in the circuit for load protection. The circuit breaker can in time cut off the circuit when the electric current of circuit exceedes the rated value, avoids circuit or electrical equipment to take place to damage. Therefore, circuit breakers are of high importance in the normal operation of electrical equipment and circuits.

It is not negligible that the circuit breaker itself is also an electrical device, and it is also necessary for the circuit to work normally to realize normal functions. In the circuit breaker, the circuit is cut off or conducted by a switching-off mechanism and a switching-on mechanism under the control of a circuit, so that the circuit can normally work only by supplying power to the circuit by a power supply. However, in some cases, the power source may fail, which may result in failure of power supply or insufficient supply voltage, which may affect the power supply of the circuit breaker and may not ensure the normal operation of the circuit breaker. Therefore, how to ensure that the circuit breaker can still work normally when the power supply is abnormal is a problem to be solved urgently.

In order to solve the above problem, the embodiment of the application provides a dual power supply circuit and a circuit breaker, which can still ensure the normal operation of the circuit breaker when the power supply of the circuit breaker is abnormal.

In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. It should be noted that, in the present application, different technical features may be combined with each other without conflict.

The double-power-supply circuit provided by the embodiment of the application can be used in the circuit breaker 1. Fig. 1 is a schematic cross-sectional view of a circuit breaker 1 according to an embodiment of the present disclosure. As shown in fig. 1, the circuit in the circuit breaker 1 is a dual power supply circuit provided by the embodiment of the present application, and may include a shunt 10, a first conductive member 20, and a second conductive member 30. Wherein the first end 101 of the shunt is connected to the movable contact 40 and the second end 102 of the shunt is connected to the first location 441 of the printed circuit board PCB 44. The first end 201 of the first conductive member is connected to the second position 442 of the PCB44, and the second end 202 of the first conductive member is connected to the stationary contact 41. The first end 301 of the second conductive member is connected to the conductive plate 42 and the second end 302 of the second conductive member is connected to the third location 443 of the PCB 44. When the primary power source is supplying power, the primary power source, shunt 10, PCB44, second conductive member 30 and conductive plate 42 form a first power supply loop. When the auxiliary power supply supplies power, the auxiliary power supply, the first conductive member 20, the PCB44, the second conductive member 30 and the conductive plate 42 form a second power supply loop.

Specifically, referring to fig. 1, the shunt 10 may include a main body structure of a manganin part for current sampling, and a pure copper part with two ends embedded with the manganin, the manganin main body and the pure copper part have the same thickness and width, and are fixed between the main power supply and the moving contact 40 after being embedded, the pure copper part at the first end is connected with the moving contact 40, and the pure copper part at the third end is connected with the first end of the main power supply. In addition, the manganin structure between the first end and the third end is provided with two thin leads 43, and any one of the thin leads 43 can be selected as the second end 102 of the shunt to be connected with the first position 441 of the PCB 44.

The first end 201 of the first conductive member is connected to the second position 442 of the PCB44, and the second end 202 of the first conductive member is connected to the stationary contact 41. The first end 301 of the second conductive member is connected to the first end of the conductive plate 42, the second end 302 of the second conductive member is connected to the third location 443 of the PCB44, and the second end of the conductive plate 42 is connected to the second end of the main power supply. Thus, the main power supply may form a first power supply loop with the shunt 10, the PCB44, the second conductive member 30, and the conductive plate 42, and the PCB44 is powered by the main power supply when the circuit breaker 1 is in operation.

The first end of the auxiliary power source is connected to the third end of the first conductive member 20, and the second end of the auxiliary power source is connected to the first end of the conductive plate 42, so that the auxiliary power source can form a second power supply loop with the first conductive member 20, the PCB44, the second conductive member 30, and the conductive plate 42, and the auxiliary power source supplies power to the PCB44 when the circuit breaker 1 operates.

In particular, the main and auxiliary power supplies are the power supplies provided in the operating environment of the circuit breaker 1. The main power supply can be a power supply provided by an industrial circuit, and the auxiliary power supply can be a storage battery. Illustratively, the main power supply may connect the second end of the conductive plate 42 and the third end 103 of the shunt to the grid line through the connection terminals, respectively, to form a first power supply loop. The auxiliary power supply may connect the first end of the conductive plate 42 and the third end of the first conductive member 20 to different lines of the main power supply through the connection terminals, respectively, to form a second power supply loop.

As shown in fig. 1, the conductive plate 42 may be an elongated plate extending from a first side of the circuit breaker 1 to a second side of the circuit breaker 1. The first side of the circuit breaker 1 may be the side to which the main power supply is connected, e.g. the right side in fig. 1, and the second side of the circuit breaker 1 may be the side to which the auxiliary power supply is connected, e.g. the left side in fig. 1. It can be seen that the first end 301 of the second conductive member is always connected to the conductive plate 42, and therefore, no matter whether the primary power supply or the secondary power supply is supplied, power is supplied to the third position 443 of the PCB44 through the first end 301 of the second conductive member, that is, the third position 443 is always the power supply position. While the first position 441 provides power to the PCB44 only when the primary power source is providing power and the second position 442 provides power to the PCB44 only when the secondary power source is providing power.

Through setting up three positions on PCB44 to be connected first position 441 and main power supply, second position 442 is connected with auxiliary power supply, and third position 443 all has to be connected with main power supply and auxiliary power supply, can switch to another power supply and supply power when the power of present power supply appears unusually, thereby guarantee through two kinds of power supply circuit that circuit breaker 1 has the electricity all the time, can not receive the influence of having a power failure, insufficient voltage etc. normal work all the time.

In the circuit breaker 1, the transmission structure can be controlled by a handle or a button to drive the movable contact 40 to move towards the direction close to the fixed contact 41 or away from the fixed contact 41, so as to control the on and off states of the movable contact 40 and the fixed contact 41. It can be understood that when the movable contact 40 and the fixed contact 41 are closed, the circuit breaker 1 is in a closing state, and when the movable contact 40 and the fixed contact 41 are disconnected, the circuit breaker 1 is in an opening state.

In some embodiments, the first electrically-conductive member 20 is operable to sense a first voltage signal on the PCB44 at the second position 442 when the primary power source is supplying power.

Specifically, when the main power is supplied, the first position 441 and the third position 443 of the PCB44 are used for receiving the current of the main power and transmitting the current to the PCB44, so as to complete the power supply. In the first power supply circuit, the first position 441 and the third position 443 are used for supplying power to the PCB44, and the second position 442 is connected to the stationary contact 41 through the first conductive member 20, and when the stationary contact 41 and the movable contact 40 are closed, the second position 442, the stationary contact 41, the movable contact 40, the shunt 10, and the PCB44 form a circuit, so that the first voltage signal can be detected at the second position 442. Therefore, when the main power supply is supplying power, if the first voltage signal not being 0 is detected at the second position 442, it can be determined that the circuit breaker 1 is currently in the closed state. Conversely, when the fixed contact 41 is disconnected from the movable contact 40, the second position 442, the fixed contact 41, the movable contact 40, the shunt 10, and the PCB44 are disconnected, and the first voltage signal is 0, it can be determined that the circuit breaker 1 is in the open state.

In some embodiments, the shunt 10 is used to detect a second voltage signal on the PCB44 at the first location 441 when the auxiliary power supply is supplying power.

Specifically, when the auxiliary power supply supplies power, the second position 442 and the third position 443 of the PCB44 are used for receiving the current of the auxiliary power supply and transmitting the current to the PCB44, so as to complete the power supply. Further, of the two thin leads 43 disposed between the first end 101 and the third end of the shunt, the other thin lead 43 not connected to the second position 442 is connected as the fourth end 104 of the shunt to the fourth position 444 of the PCB 44.

Therefore, in the second power supply loop, the second position 442 and the third position 443 are used for supplying power to the PCB44, and the first position 441 is connected to the movable contact 40 through the shunt 10, when the fixed contact 41 and the movable contact 40 are closed, the first position 441, the shunt 10, and the fourth position 444 form a loop, so that a second voltage signal between the first position 441 and the fourth position 444 can be detected on the PCB44, and thus, a current value can be calculated according to the second voltage signal, electric quantity can be calculated in an accumulated manner, overload protection can be performed in time according to the current value, and the like.

In some embodiments, the first conductive member 20 is a torsion spring 45, the first torsion arm 451 of the torsion spring 45 is connected to the second position 442, and the second torsion arm 452 of the torsion spring 45 is connected to the stationary contact 41.

In some embodiments, as shown in connection with fig. 1 and 2, the second position 442 is configured as the PCB conductive pin 46. When the first conductive member 20 is a torsion spring 45, the first torsion arm 451 of the torsion spring 45 abuts against the PCB conductive pin 46.

Fig. 2 is a schematic partial structural diagram of a circuit breaker 1 according to an embodiment of the present disclosure, and fig. 3 is a schematic partial structural diagram corresponding to another angle in fig. 2 according to an embodiment of the present disclosure. As shown in fig. 2 and 3, first conductive member 20 may be a torsion spring 45, and second location 442 of pcba 44 may be provided with a conductive pin 46 such that first torsion arm 451 of torsion spring 45 may be urged against conductive pin 46 under torsion to be in tight connection with second location 442. The second torsion arm 452 of the torsion spring 45 can be connected to the fixed contact 41 by abutting against the fixed striking angle 47 connected to the fixed contact 41.

The torsion arm of the torsion spring 45 is abutted against the conductive pin 46 or the static arc-striking angle 47 to connect the second position 442 and the static contact 41, so that the connection is tight and reliable under the action of the torsion force, excessive circuits are prevented from existing in the circuit breaker 1, and the circuit structure in the circuit breaker 1 is simple and clean.

In some embodiments, the first conductive member 20 is a lead, a first end of the lead is connected to the second position 442, and a second end of the lead is connected to the stationary contact 41. The second position 442 and the stationary contact 41 are directly connected by a lead wire, so that the structure is simple and the connection between the two is effectively established.

In some embodiments, the second conductive member 30 is a torsion spring 45, the first torsion arm 451 of the torsion spring 45 is connected to the conductive plate 42, and the second torsion arm 452 of the torsion spring 45 is connected to the third position 443.

In some embodiments, as shown in connection with fig. 1 and 2, the third location 443 is configured as a PCB conductive pin 46. When the second conductive member 30 is a torsion spring 45, the second torsion arm 451 of the torsion spring 45 abuts against the PCB conductive pin 46.

Referring to fig. 2 and 3, the second conductive member 30 may be a torsion spring 45, and the third position 443 of the pcba 44 may be provided with a conductive pin 46, so that the second torsion arm 452 of the torsion spring 45 may abut against the conductive pin 46 under the action of torsion force to be closely connected to the third position 443. The first torsion arm 451 of the torsion spring 45 may be connected to the main power source or the auxiliary power source by abutting against the conductive plate 42 connected to the main power source and the auxiliary power source.

In some embodiments, the second conductive member 30 is a lead, a first end of which is connected to the conductive plate 42 and a second end of which is connected to the third location 443. The conductive plate 42 and the third position 443 are directly connected by a wire, the structure is simple, and the connection between the two is efficiently established.

In an example, the dual power supply circuit junction of the present embodiment is described in detail by taking a specific circuit breaker 1 as an example.

At the first side of circuit breaker 1, be equipped with female end 2 of arranging of positive pole and female end 3 of arranging of negative pole for with be located the positive negative pole of outside main power supply and be connected, when the power supply circuit in circuit breaker 1 was first power supply circuit, the main power supply can be arranged end 2 and female end 3 of arranging of negative pole through the positive pole and supply power to the PCB44 of circuit breaker 1.

Specifically, the other end of the positive busbar end 2 is connected to the third end 103 of the shunt, the second end 102 of the shunt is connected to the first position 441 of the PCB44, the other end of the negative busbar end 3 is connected to the first end 301 of the second conductive member, the second end 302 of the second conductive member is connected to the third position 443 of the PCB44, and the main power supply, the positive busbar end 2, the shunt 10, the PCB44, the second conductive member 30 and the negative busbar end 3 form a first power supply loop, so that the main power supply can supply power to the PCB 44.

And an auxiliary power supply is arranged on the second side of the circuit breaker 1, the anode and the cathode of the auxiliary power supply are respectively connected with the first conductive piece 20 and the second conductive piece 30, and when the power supply loop in the circuit breaker 1 is a second power supply loop, the auxiliary power supply can supply power to the PCB44 of the circuit breaker 1 through the first conductive piece 20 and the second conductive piece 30.

Specifically, the first end 201 of the first conductive member is connected to the second position 442 of the PCB44, the second end 302 of the second conductive member is connected to the third position 443 of the PCB44, and the auxiliary power source, the first conductive member 20, the PCB44, and the second conductive member 30 form a second power supply loop, so that the auxiliary power source can supply power to the PCB 44.

In some embodiments, the first end 101 of the shunt is connected to the movable contact 40, the second end 202 of the first conductive member is connected to the fixed contact 41, and the movable contact 40 is moved by the transmission structure to open and close the fixed contact 41, so as to open and close the circuit breaker 1.

When the power supply loop is a first power supply loop, the first end 201 of the first conductive member connected to the second position 442 may be used as a signal feedback end to detect a voltage signal at the second position 442. When the movable contact 40 and the fixed contact 41 are closed, a current passes through the second position 442, and a voltage is detected at the second position 442, and the PCB44 determines that the current circuit breaker 1 is in a closing state according to that the voltage value detected at the second position 442 is greater than 0. When the movable contact 40 and the fixed contact 41 are disconnected, no current flows through the second position 442, so that the detected voltage is 0, and the pcbs44 determines that the current circuit breaker 1 is in the open state according to the voltage detected by the second position 442 being 0.

Therefore, when the power supply loop is the first power supply loop, the main power supply supplies power to the PCB44, and whether the voltage value detected by the PCB44 through the second position 442 is 0 or not can determine that the current circuit breaker 1 is in an open or closed state.

In some embodiments, the current divider 10 further includes a fourth end, the fourth end 104 of the current divider being connected to a fourth location 444 of the PCB 44. When the power supply circuit is the second power supply circuit, the auxiliary power supply supplies power to the second position 442 and the third position 443 of the PCB44 through the first conductive member 20 and the second conductive member 30, thereby supplying power to the PCB 44. At this time, the fourth position 444 of the PCB44 may detect the voltage signal of the shunt 10, and the PCB44 may calculate a current value of the fourth position 444 according to the voltage value of the detected voltage signal, so as to calculate a power consumption of the PCB44, or when the current value exceeds a rated value, it is determined that the circuit breaker 1 is currently in an overload state, and overload protection is performed on the circuit breaker 1.

In some embodiments, the shunt 10 includes a conductive body, a first lead, and a second lead. The first end of the conductive body is connected to a main power source, the second end of the conductive body is flexibly connected to the movable contact 40, the first lead is connected to the first position 441 of the PCB44, and the second lead is connected to the fourth position 444 of the PCB 44.

In particular, a flexible connection means that the electrical conductor connecting the two parts can flex or move, such as a flexible wire. When the movable contact 40 moves toward the shunt 10, the flexible wire is bent, and when the movable contact 40 moves away from the shunt 10, the flexible wire is elongated.

In some embodiments, the second position 442 of the PCB44 is provided with a conductive pin 46, the first conductive member 20 is a torsion spring 45, the first torsion arm 451 of the torsion spring 45 is connected to the fixed contact 41, and the second torsion arm 452 of the torsion spring 45 is connected to the conductive pin 46; and/or, a conductive pin 46 is provided at the third position 443 of the PCB44, the second conductive member 30 is a torsion spring 45, the first torsion arm 451 of the torsion spring 45 is connected to the main power supply, and the second torsion arm 452 of the torsion spring 45 is connected to the conductive pin 46.

Specifically, the second torsion arm 452 of the torsion spring 45 abuts against the conductive pin 46 under the action of the torsion force, and the connection with the conductive pin 46 is completed.

In some embodiments, the stationary contact 41 is connected to the first conductive member 20 through a stationary arc ignition angle 47.

Specifically, the stationary contact 41 is connected to one end of the stationary arc-striking angle 47, and the first torsion arm 451 of the torsion spring 45 abuts against the other end of the stationary arc-striking angle 47 under the action of a torsion force.

In some embodiments, the main power supply and the second conductive member 30 are connected by an N-pole through board.

The N-pole feedthrough board is the conductive board 42 described above.

Specifically, the main power supply is connected with one end of the positive busbar end 2, the other end of the positive busbar end 2 is connected with one end of the N-pole through plate, and the first torsion arm 451 of the torsion spring 45 abuts against the other end of the N-pole through plate under the action of torsion force.

The double-power-supply circuit provided by the embodiment of the application is characterized in that three positions are arranged on the PCB44, the first position 441 is connected with a main power supply, the second position 442 is connected with an auxiliary power supply, the third position 443 is connected with the main power supply and the auxiliary power supply, and when the power supply for supplying power at present is abnormal, the power supply is switched to another power supply for supplying power, so that the circuit breaker 1 is always powered by two power supply loops, the influence of power failure, insufficient voltage and the like can be avoided, and the double-power-supply circuit always works normally.

The embodiment of the present application further provides a circuit breaker 1, which includes the dual power supply circuit in the above embodiment. The first power supply loop and the second power supply loop in the dual power supply circuit provided by the above embodiment are switched with each other.

Specifically, after acquiring the first voltage signal at the second position 442 in the first power supply loop, the PCB44 determines whether the first voltage value of the first voltage signal or the first variation value of the first voltage value belongs to the abnormal range. When the first voltage value belongs to the first abnormal range or the first variation value belongs to the second abnormal range, it may be determined that the main power supply supplying power to the PCB44 in the first power supply loop has a fault, and at this time, the power supply loop is switched to the second power supply loop, and the auxiliary power supply supplies power to the PCB 44.

Similarly, when the power supply circuit in the circuit breaker 1 is the second power supply circuit, whether to switch the power supply circuit to the first power supply circuit may be determined by whether the second voltage value of the second voltage signal or the second variation value of the second voltage value belongs to the abnormal range.

Whether the voltage value or the voltage change value of the current power supply loop belongs to the abnormal range or not can be judged, whether the power supply source of the current power supply loop has a fault or not can be found in time, so that the power supply loop can be switched in time, and the PCB44 is guaranteed to be electrified and work normally all the time.

In some embodiments, the switching of the first and second power supply loops may be limited by an abnormal time and/or an abnormal number of times.

For example, when the auxiliary power source is a storage battery and the storage battery has little charge, the power supply loop is switched to a second power supply loop powered by the auxiliary power source due to the failure of the main power source, and the charge of the storage battery is exhausted before the main power source is repaired, so that a normal voltage cannot be provided, and at this time, the circuit breaker 1 determines to replace the power supply loop to the first power supply loop according to a second voltage value or a second variation value of the second voltage signal. And at the moment, the main power supply is not successfully repaired, and the power supply loop is determined to be replaced into the second power supply loop again according to the first voltage signal. Because the time for detecting the voltage signal and judging whether to replace the power supply loop or not and the time for replacing the power supply loop according to the voltage signal are very fast, when the power supply abnormality exists in both the main power supply and the auxiliary power supply, in order to avoid the useless power caused by switching the power supply loop for many times, the switching times can be limited by the abnormality time or the abnormality times. For example, when the number of times of abnormality of the first voltage signal and the second voltage signal exceeds 5 times within the abnormal time, it may be determined that neither of the two current power supply circuits can work normally, and a warning message may be sent to the user in a manner of beeping or packet transmission, so as to prompt the user to resolve the problem.

In some embodiments, the circuit breaker 1 provided by the embodiments of the present application is a plug-in circuit breaker 1.

To sum up, the double power supply circuit and the circuit breaker 1 that this application embodiment provided are through setting up three positions on PCB44 to be connected first position 441 and main power supply, second position 442 is connected with auxiliary power supply, third position 443 all has to be connected with main power supply and auxiliary power supply, can appear when unusual in the power of current power supply, switch to another power and supply power, thereby guarantee circuit breaker 1 to have the electricity all the time through setting up two kinds of power supply return circuits, can not receive the influence of having a power failure, insufficient voltage etc., normal work all the time. In addition, when the main power supply supplies power, the opening and closing state of the circuit breaker 1 can be judged by monitoring the first voltage signal of the PCB 44.

In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps other than those listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The application may be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means can be embodied by one and the same item of hardware. The use of first, second, third, etc. does not denote any order, and the words may be interpreted as names. The steps in the above embodiments should not be construed as limiting the order of execution unless specified otherwise.

The above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.

Claims (10)

1. A dual supply circuit, comprising:

the first end of the shunt is connected with the moving contact, and the second end of the shunt is connected with the first position of the Printed Circuit Board (PCB);

a first conductive piece, wherein a first end of the first conductive piece is connected with a second position of the PCB, and a second end of the first conductive piece is connected with a fixed contact;

a second conductive member, a first end of which is connected to the conductive plate and a second end of which is connected to a third position of the PCB;

when the main power supply supplies power, the main power supply, the shunt, the PCB, the second conductive piece and the conductive plate form a first power supply loop;

when the auxiliary power supply supplies power, the auxiliary power supply, the first conductive piece, the PCB, the second conductive piece and the conductive plate form a second power supply loop.

2. The circuit of claim 1, wherein the first electrically conductive member is configured to detect a first voltage signal on the PCB at the second location when the primary power source is powered.

3. The circuit of claim 2, wherein the shunt is configured to detect a second voltage signal on the PCB at the first location when the auxiliary power source is supplying power.

4. The circuit of claim 1, wherein the first conductive member is a torsion spring, a first torsion arm of the torsion spring is connected to the second position, and a second torsion arm of the torsion spring is connected to the stationary contact.

5. The circuit of claim 1, wherein the second conductive member is a torsion spring, a first torsion arm of the torsion spring is connected to the conductive plate, and a second torsion arm of the torsion spring is connected to the third position.

6. The circuit of claim 4, wherein the second position is configured as a PCB conductive pin; the first torsion arm of the torsion spring is abutted against the PCB conductive pin.

7. The circuit of claim 5, wherein the third position is configured as a PCB conductive pin; and the second torque arm of the torsion spring is abutted against the PCB conductive pin.

8. The circuit of claim 1, wherein the first conductive member is a lead, a first end of the lead is connected to the second location, and a second end of the lead is connected to the stationary contact; and/or the presence of a gas in the atmosphere,

the second conductive member is a lead wire, a first end of the lead wire is connected with the conductive plate, and a second end of the lead wire is connected with the third position.

9. A circuit breaker, comprising: the dual supply circuit of any one of claims 1 to 8.

10. The circuit breaker of claim 9, wherein the circuit breaker is a plug-in circuit breaker.

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