Circuit breaker, power distribution system and signal detection system

Abstract

The present invention relates to the field of low-voltage electrical appliances, and particularly to a circuit breaker. The circuit of its breaking pole includes an input terminal T1, an output terminal T2, and a main contact mechanism. The circuit breaker further includes a first signal assembly, which includes a first signal terminal ST1 and an auxiliary contact mechanism. The first signal terminal ST1 is connected to the output terminal T2 through the auxiliary contact mechanism. The operating mechanism OM drives the main contact mechanism to close and the auxiliary contact mechanism to open, or the operating mechanism OM drives the main contact mechanism to open and the auxiliary contact mechanism to close; the first signal terminal ST1 is used to determine whether the main contact mechanism is welded; the circuit breaker of the present invention can detect whether the main contact mechanism is welded. The present invention also discloses a power distribution system including the circuit breaker, which is more safe and reliable in assembly; the present invention also discloses a signal detection system including the power distribution system, which can detect whether the main contact mechanism of the circuit breaker is welded.

Description

Technical Field

[0001] The present invention relates to the field of low-voltage electrical appliances, and particularly to a circuit breaker; it also relates to a power distribution system including the circuit breaker; and it further relates to a signal detection system including the power distribution system. Background Art

[0002] A circuit breaker is an electrical device that can connect and disconnect a circuit. Since the main contacts of a circuit breaker usually need to carry a large current, when the number of times the circuit breaker connects and disconnects is too many, resulting in too large a resistance between the main contacts or too large an instantaneous current flowing through, causing a large amount of heat generation at the contacts, the main contacts are prone to welding and sticking and cannot be disconnected. Existing circuit breakers do not have a welding detection function, presenting potential safety hazards in use. Summary of the Invention

[0003] The purpose of the present invention is to overcome the defects of the prior art and provide a circuit breaker that can detect whether the main contact mechanism is welded; it also provides a power distribution system including the circuit breaker, which is more safe and reliable in assembly; and it further provides a signal detection system including the power distribution system, which realizes the detection of whether the main contact mechanism of the circuit breaker is welded.

[0004] To achieve the above purpose, the present invention adopts the following technical solutions:

[0005] A circuit breaker includes a breaking pole circuit and an operating mechanism OM. The breaking pole circuit includes an input terminal T1, an output terminal T2, and a main contact mechanism connected in series between the input terminal T1 and the output terminal T2. The main contact mechanism includes a cooperating moving main contact MC1 and a static main contact SC1; the circuit breaker further includes a first signal component, which includes a first signal terminal ST1 and an auxiliary contact mechanism. The auxiliary contact mechanism includes a cooperating moving auxiliary contact MC2 and a static auxiliary contact SC2. The first signal terminal ST1 is connected to the output terminal T2 through the auxiliary contact mechanism; the operating mechanism OM is in driving cooperation with the main contact mechanism and the auxiliary contact mechanism respectively. The operating mechanism OM drives the main contact mechanism to close and the auxiliary contact mechanism to open, or the operating mechanism OM drives the main contact mechanism to open and the auxiliary contact mechanism to close; the first signal terminal ST1 is used to judge whether the main contact mechanism is welded.

[0006] Preferably, after the circuit breaker performs a tripping operation, if the first signal terminal ST1 outputs a signal, it is judged that the main contact mechanism is welded; if the first signal terminal ST1 does not output a signal, it is judged that the main contact mechanism is not welded.

[0007] Preferably, the auxiliary contact mechanism is driven to close / open by the operating mechanism OM or the moving main contact MC1.

[0008] Preferably, the driving end of the auxiliary contact mechanism is located on the moving path of the operating mechanism OM or the main contact MC1 when the circuit breaker is closed or opened.

[0009] Preferably, when the circuit breaker is closed, the operating mechanism OM drives the main contact mechanism to close and the auxiliary contact mechanism to open; when the circuit breaker is opened, the operating mechanism OM drives the main contact mechanism to open and the auxiliary contact mechanism to close.

[0010] Preferably, the auxiliary contact mechanism is a microswitch.

[0011] Preferably, the first signal component further includes a current-limiting resistor R1, and the first signal terminal ST1 is connected in series with the auxiliary contact mechanism through the current-limiting resistor R1.

[0012] Preferably, the circuit breaker further includes a second signal component. The second signal component includes a second signal terminal ST2. The second signal terminal ST2 is connected to the output terminal T2 and is used to judge the closed and open states of the main contact mechanism.

[0013] Preferably, the second signal component further includes a current-limiting resistor R2, and the second signal terminal ST2 is connected to the output terminal T2 through the current-limiting resistor R2.

[0014] Preferably, after the circuit breaker performs an opening operation, if the first signal terminal ST1 outputs a signal or both the first signal terminal ST1 and the second signal terminal ST2 output signals, it is determined that the main contact mechanism is welded; if the first signal terminal ST1 does not output a signal and the second signal terminal ST2 outputs a signal, it is determined that the main contact mechanism is closed; if the first signal terminal ST1 does not output a signal and the second signal terminal ST2 does not output a signal, it is determined that the main contact mechanism is open.

[0015] Preferably, the circuit breaker further includes a direct-through pole circuit. The direct-through pole circuit includes an input terminal T3, an output terminal T4, and a direct-through pole conductor connected in series between the input terminal T3 and the output terminal T4.

[0016] A power distribution system includes the circuit breaker described above; the power distribution system further includes a power source and a load Load, which are respectively connected to the input end and the output end of the circuit breaker; the power source is a DC power source DC or an AC power source AC.

[0017] Preferably, the circuit breaker further includes a direct-through pole circuit. The direct-through pole circuit includes an input terminal T3, an output terminal T4, and a direct-through pole conductor connected in series between the input terminal T3 and the output terminal T4; the power source is respectively connected to the input terminal T1 and the input terminal T3, and the load Load is respectively connected to the output terminal T2 and the output terminal T4.

[0018] A signal detection system includes the distribution system described above. The signal detection system further includes a first signal detection device V1, and the first signal detection device V1 is connected to a first signal terminal ST1 to determine whether the main contact mechanism of the circuit breaker is welded.

[0019] Preferably, the circuit breaker further includes a second signal component, and the second signal component includes a second signal terminal ST2, and the second signal terminal ST2 is connected to an output terminal T2.

[0020] The signal detection system further includes a second signal detection device V2, and the second signal detection device V2 is connected to the second signal terminal ST2 to determine the closed and open states of the main contact mechanism.

[0021] Preferably, the circuit breaker further includes a direct-through pole circuit. The direct-through pole circuit includes an input terminal T3, an output terminal T4, and a direct-through pole conductor connected in series between the input terminal T3 and the output terminal T4. The input terminal T1 and the input terminal T3 are respectively connected to a power source, the output terminal T2 and the output terminal T4 are respectively connected to a load Load, and the first signal detection device V1 is connected between the first signal terminal ST1 and the input terminal T3. The signal detection system further includes a second signal detection device, and the signal detection device is connected between the second signal terminal ST2 and the input terminal T3.

[0022] The circuit breaker of the present invention includes a breaking pole circuit and a first signal component. The breaking pole circuit includes a main contact mechanism, and the first signal component includes a first signal terminal ST1 and an auxiliary contact mechanism. The first signal terminal ST1 is connected to the output terminal T2 of the breaking pole circuit through the auxiliary contact mechanism. The closing and opening actions of the main contact mechanism and the auxiliary contact mechanism are opposite, that is, the operating mechanism OM drives the main contact mechanism to close and the auxiliary contact mechanism to open, or the operating mechanism OM drives the main contact mechanism to open or the auxiliary contact mechanism to close. Whether the main contact mechanism is welded can be determined through the first signal terminal. In addition, the circuit breaker of the present invention can also be provided with a second signal component, and the second signal component includes a second signal terminal ST2 connected to the output terminal T2, and the open and closed states of the main contact mechanism can be determined through the second signal terminal ST2.

[0023] The distribution system of the present invention includes the circuit breaker described above. The output end of the circuit breaker is connected to a load Load, the input end of the circuit breaker is connected to a power source, and the first signal terminal is connected to the output terminal ST2 of the breaking pole, making the assembly process of the distribution system more reliable and safer.

[0024] The signal detection system of the present invention includes the power distribution system and the first signal detection device V1. The first signal detection device V1 obtains the output signal from the first signal terminal to determine whether the main contact mechanism of the circuit breaker is welded. In addition, a second signal component can be provided in the circuit breaker, and the second signal detection device V2 in the signal detection system can obtain the output signal from the second signal terminal ST2 to determine the open and closed states of the main contact mechanism of the circuit breaker. Description of the Drawings

[0025] Figure 1 is a schematic structural diagram of the first embodiment of the circuit breaker of the present invention, and the circuit breaker is in the closed state;

[0026] Figure 2 is a schematic structural diagram of the first embodiment of the circuit breaker of the present invention, and the circuit breaker is in the open state;

[0027] Figure 3 is a schematic structural diagram of the first embodiment of the circuit breaker of the present invention, and the main contact mechanism is welded;

[0028] Figure 4 is a schematic structural diagram of the second embodiment of the circuit breaker of the present invention, and the circuit breaker is in the open state;

[0029] Figure 5 is a schematic structural diagram of the third embodiment of the circuit breaker of the present invention, and the circuit breaker is in the open state;

[0030] Figure 6 is a schematic structural diagram of the power distribution system of the present invention;

[0031] Figure 7 is a schematic structural diagram of the signal detection system of the present invention. Detailed Embodiments

[0032] The following, in combination with the Figure 1-7 embodiments given, further illustrate the specific embodiments of the circuit breaker of the present invention, the power distribution system including the circuit breaker, and the signal detection system including the power distribution system. The circuit breaker, power distribution system, and signal detection device of the present invention are not limited to the descriptions of the following embodiments.

[0033] The circuit breaker of the present invention includes a breaking pole circuit and an operating mechanism OM. The breaking pole circuit includes an input terminal T1, an output terminal T2, and a main contact mechanism connected in series between the input terminal T1 and the output terminal T2. The main contact mechanism includes a moving main contact MC1 and a stationary main contact SC1 used in cooperation; the circuit breaker further includes a first signal assembly, the first signal assembly includes a first signal terminal ST1 and an auxiliary contact mechanism, the auxiliary contact mechanism includes a moving auxiliary contact MC2 and a stationary auxiliary contact SC2 used in cooperation, and the first signal terminal ST1 is connected to the output terminal T2 through the auxiliary contact mechanism; the operating mechanism OM is respectively drivingly cooperated with the main contact mechanism and the auxiliary contact mechanism, and the operating mechanism OM drives the main contact mechanism to close and the auxiliary contact mechanism to open, or the operating mechanism OM drives the main contact mechanism to open and the auxiliary contact mechanism to close; the first signal terminal ST1 is used to judge whether the main contact mechanism is welded. For the circuit breaker of the present invention, its first signal terminal is used to judge whether the main contact mechanism is welded, which is convenient for users to timely discover the welding problem of the circuit breaker and handle it in time, and is beneficial to improving the user's power consumption safety.

[0034] Preferably, after the circuit breaker performs a tripping operation, if the first signal terminal ST1 outputs a signal, it is judged that the main contact mechanism is welded, and if the first signal terminal ST1 does not output a signal, it is judged that the main contact mechanism is not welded.

[0035] Preferably, the auxiliary contact mechanism is a micro switch.

[0036] The circuit breaker of the present invention will be further described below in conjunction with the specification drawings and specific embodiments.

[0037] As Figure 1 and 2 shown, a first embodiment of the circuit breaker of the present invention is disclosed, which includes a breaking pole circuit, an operating mechanism OM and a first signal assembly; the breaking pole circuit of the circuit breaker includes an input terminal T1, an output terminal T2, and a main contact mechanism connected in series between the input terminal T1 and the output terminal T2; the main contact mechanism includes a moving main contact MC1 and a stationary main contact SC1 used in cooperation, the moving main contact MC1 is connected to the output terminal T2, and the stationary main contact SC1 is connected to the input terminal T1; the operating mechanism OM is drivingly cooperated with the main contact mechanism and the auxiliary contact mechanism, and the closing and opening actions of the main contact mechanism and the auxiliary contact mechanism are opposite.

[0038] Preferably, as Figure 1 shown, when the circuit breaker of the present invention is closed, the operating mechanism OM drives the main contact mechanism to close and drives the auxiliary contact mechanism to open; as Figure 2 shown, when the circuit breaker of the present invention is tripped, the operating mechanism OM drives the main contact mechanism to open and drives the auxiliary contact mechanism to close.

[0039] It should be noted that the operating mechanism OM can directly drive the auxiliary contact mechanism to act, or indirectly drive the auxiliary contact mechanism to act. Specifically: after the operating mechanism OM drives the main contact mechanism to act, the auxiliary contact mechanism is driven to act by the moving contact MC1 in the main contact mechanism. Further, the driving end of the auxiliary contact mechanism is located on the moving path of the operating mechanism OM or the moving contact MC1 when the circuit breaker is closed or opened.

[0040] It should be noted that the circuit breaker of the present invention can also be: the moving contact MC1 is connected to the input terminal T1 and the main static contact SC1 is connected to the output terminal T2; the input terminal T1 is used to connect to the power supply, the output terminal T2 is used to connect to the load Load, and the main contact mechanism is used to connect or disconnect the circuit between the power supply and the load Load.

[0041] Preferably, as Figure 1 and 2 shown, the input terminal T1, the main contact mechanism, the auxiliary contact mechanism, and the first signal terminal ST1 are connected in series as the first signal branch, which is a part of the first signal detection circuit. The signal detection device externally connected to the circuit breaker can obtain signals from the first signal terminal ST1. Further, as Figure 1 and 2 shown, the first signal component further includes a current-limiting resistor R1. The first signal terminal ST1 is connected in series with the auxiliary contact mechanism through the current-limiting resistor R1. The current-limiting resistor R1 is used to limit the magnitude of the current flowing through the first signal component, avoiding excessive current from burning out or damaging the signal detection device externally connected to the circuit breaker connected to the first signal terminal ST1.

[0042] Preferably, the resistance value of the current-limiting resistor R1 ≥ 1 kΩ.

[0043] Preferably, the auxiliary contact mechanism is a micro switch.

[0044] The following is the specific principle for the first signal terminal ST1 to judge whether the main contact mechanism is welded:

[0045] As Figure 2 shown, when the circuit breaker of the present invention is opened, the main contact mechanism is not welded, the moving contact MC1 and the main static contact SC1 can be normally disconnected, and the auxiliary contact mechanism is closed. At this time, the first signal terminal ST1 does not output a signal. As Figure 3 shown, after the circuit breaker of the present invention performs the opening operation, the main contact mechanism is welded, the moving contact MC1 and the main static contact SC1 cannot be normally disconnected and there is still an electrical connection, and the auxiliary contact mechanism is closed. At this time, the first signal terminal ST1 outputs a signal, and it can be judged that the main contact mechanism is welded based on this. That is to say, after the circuit breaker of the present invention performs the opening operation, if the first signal terminal ST1 outputs a signal, it is judged that the main contact mechanism is welded; if the first signal terminal ST1 does not output a signal, it is judged that the main contact mechanism is not welded.

[0046] As shown Figure 4 in the figure, the second embodiment of the circuit breaker of the present invention is disclosed.

[0047] The difference between the circuit breaker of the second embodiment and that of the first embodiment lies in that: the circuit breaker of the second embodiment further includes a second signal component, the second signal component includes a second signal terminal ST2, the second signal terminal ST2 is connected to the output terminal T2, and the second signal terminal ST2 is used to judge the closed and open states of the main contact mechanism.

[0048] Preferably, as shown Figure 4 in the figure, the input terminal T1, the main contact mechanism, and the second signal terminal ST2 are connected in series as a second signal branch, which is a part of the second signal detection circuit, and the signal detection device externally connected to the circuit breaker can obtain signals from the second signal terminal ST2. Further, as shown Figure 4 in the figure, the second signal component further includes a current-limiting resistor R2, the second signal terminal ST2 is connected to the output terminal T2 through the current-limiting resistor R2, and the current-limiting resistor R2 is used to limit the magnitude of the current flowing through the second signal component, so as to avoid burning or damaging the signal detection device externally connected to the circuit breaker connected to the second signal terminal ST2 due to excessive current.

[0049] Preferably, the resistance of the current-limiting resistor R2 ≥ 1 kΩ.

[0050] The following is the principle of the second signal terminal ST2 judging the closed and open states of the main contact mechanism:

[0051] When the circuit breaker of the present invention is closed, the main contact mechanism is closed, and the second signal terminal ST2 outputs a signal.

[0052] As shown Figure 4 in the figure, when the circuit breaker of the present invention is opened, the main contact mechanism is opened, and the second signal terminal ST2 has no signal output.

[0053] That is to say, if the second signal terminal ST2 outputs a signal, it is judged that the main contact mechanism is closed; if the second signal terminal ST2 has no signal output, it is judged that the main contact mechanism is opened.

[0054] Preferably, the second signal terminal ST2 can also be used in cooperation with the first signal terminal ST1 to judge the closed and open states of the main contact mechanism. Specifically: when the circuit breaker of the present invention is closed, the main contact mechanism is closed and the auxiliary contact mechanism is opened. At this time, the first signal terminal ST1 has no signal output and the second signal terminal ST2 outputs a signal; that is to say, if the first signal terminal ST1 has no signal output and the second signal terminal ST2 outputs a signal, the main contact mechanism is closed. As shown Figure 4As shown, when the circuit breaker of the present invention is tripped, if the main contact mechanism is not welded, it can be normally disconnected, and the auxiliary contact mechanism is closed. At this time, the first signal terminal ST1 has no signal output, and the second signal terminal ST2 has no signal output; that is to say, if neither the first signal terminal ST1 nor the second signal terminal ST2 outputs a signal, the main contact mechanism is disconnected.

[0055] Preferably, the second signal terminal ST2 can also be used in conjunction with the first signal terminal ST1 to determine whether the main contact mechanism is welded. Specifically: when the circuit breaker of the present invention is tripped, if the main contact mechanism is welded and cannot be normally disconnected and there is still an electrical connection, the auxiliary contact mechanism is closed. At this time, both the first signal terminal ST1 and the second signal terminal ST2 output signals; that is to say, after the circuit breaker of the present invention performs a tripping operation, if both the first signal terminal ST1 and the second signal terminal ST2 output signals, it is determined that the main contact mechanism is welded.

[0056] It should be noted that in the circuit breaker of the present invention, its breaking pole circuit, first signal component, and second signal component are used in one-to-one correspondence. Therefore, the circuit breaker of the present invention is not limited to including only one breaking pole circuit, that is, it can include multiple breaking pole circuits, and also includes a first signal component and a second signal component respectively used in conjunction with each breaking pole circuit. That is to say, improvements to the circuit breaker only by increasing or decreasing the number of breaking pole circuits, first signal components, and second signal components should also fall within the protection scope of this application.

[0057] As Figure 5 shown, it is the third embodiment of the circuit breaker of the present invention.

[0058] The difference between the circuit breaker of the third embodiment and the circuit breaker of the second embodiment is that: the circuit breaker of the third embodiment further includes a through pole circuit, and the through pole circuit includes an input terminal T3, an output terminal T4, and a through pole conductor connected in series between the input terminal T3 and the output terminal T4. Specifically, the input end of the circuit breaker of the present invention includes an input terminal T1 and an input terminal T3, and the output end of the circuit breaker includes an output terminal T2 and an output terminal T4; the input terminal T1 and the input terminal T3 are used to connect to the power supply, and the output terminal T2 and the output terminal T4 are used to connect to the load Load, and the main contact mechanism is used to connect or disconnect the circuit between the power supply and the load Load.

[0059] As Figure 6 shown, the present invention also discloses a power distribution system including the circuit breaker.

[0060] As Figure 6 described, the circuit breaker, power supply, and load Load of the power distribution system of the present invention, and the input end and output end of the circuit breaker are respectively connected to the power supply and the load Load.

[0061] Specifically, as Figure 6As shown, the circuit breaker of the power distribution system of the present invention has the same structure as that of the circuit breaker of the third embodiment. The output terminals T2 and T4 of the circuit breaker are respectively connected to both ends of the load Load, and the input terminals T1 and T3 of the circuit breaker are respectively connected to both ends of the power supply. The main contact mechanism in the circuit breaker is used to connect and disconnect the circuit between the power supply and the load Load. Further, as Figure 6 shown, the power supply is a DC power supply DC or an AC power supply AC; when the power supply is an AC power supply AC, the input terminal T1 of the open-circuit pole circuit is connected to the phase pole of the AC power supply AC, and the input terminal T3 of the through-pole circuit is connected to the N pole of the AC power supply AC.

[0062] For the power distribution system of the present invention, the output terminals T2 and T4 of its circuit breaker are respectively connected to both ends of the load Load, and the input terminals T1 and T3 of the circuit breaker are respectively connected to both ends of the power supply. The first signal terminal ST1 and the second signal terminal ST2 are both connected to the output terminal T2 of the circuit breaker. During the assembly process of the power distribution system of the present invention, that is, during the process of connecting the circuit breaker to the power supply, since the circuit breaker is in the open state, the first signal terminal ST1 and the second signal terminal ST2 will not be energized, making the assembly process of the power distribution system more reliable and safer.

[0063] It should be noted that the circuit breaker of the power distribution system of the present invention can also have the same structure as that of the circuit breaker of the second embodiment of the present invention. At this time, the phase pole or the positive pole of the power supply is connected to one end of the load Load through the circuit breaker, and the N pole or the negative pole of the power supply is connected to the other end of the load Load through a wire, without the need to provide a through-pole circuit inside the circuit breaker. Or, the power distribution system of the present invention can also apply the circuit breaker of the first embodiment of the present invention. At this time, the phase pole or the positive pole of the power supply is connected to one end of the load Load through the circuit breaker, and the N pole or the negative pole of the power supply is connected to the other end of the load Load through a wire, without the need to provide a through-pole circuit inside the circuit breaker, except that the circuit breaker of the first embodiment lacks the detection of the closed and open states of the main contact mechanism.

[0064] As Figure 7 shown, the present invention also discloses a signal detection system including the power distribution system.

[0065] As Figure 7 shown, the signal detection system of the present invention includes a power distribution system, a first signal detection device V1 and a second signal detection device V2; the first signal detection device V1 is connected to the first signal terminal ST1 of the circuit breaker, and the second signal detection device V2 is connected to the second signal terminal ST2 of the circuit breaker. The first signal detection device V1 obtains a signal from the first signal terminal ST1 to determine whether the main contact mechanism of the circuit breaker is welded, and the second signal detection device V2 obtains a signal from the second signal terminal ST2 to determine the closed and open states of the main contact mechanism of the circuit breaker.

[0066] Specifically, as Figure 7 shown, the first signal detection device V1 is connected between the first signal terminal ST1 and the input terminal T3 of the through-pole circuit, and the second signal detection device V2 is connected between the second signal terminal ST2 and the input terminal T3 of the through-pole circuit; thus, the power supply, the main contact mechanism, the auxiliary contact mechanism, the first signal terminal ST1, and the first signal detection device V1 can form a first signal detection loop, and the first signal detection device V1 is connected in parallel with the load Load; the power supply, the main contact mechanism, the second signal terminal ST2, and the second signal detection device V2 can form a second signal detection loop, and the second signal detection device V2 is connected in parallel with the load Load.

[0067] Preferably, the first signal detection device V1 and the second signal detection device V2 are voltage signal detection devices or current signal detection devices.

[0068] It should be noted that the signal detection system of the present invention can also be applied to the circuit breakers of the first embodiment or the second embodiment of the present invention, and only the first signal detection device V1 and the second signal detection device V2 need to be connected in parallel with the load Load.

[0069] The principle of the first signal detection device V1 for judging whether the main contact mechanism is welded and the principle of the second signal detection device V2 for judging the closed and open states of the main contact mechanism are the same as those described above, and will not be elaborated here.

[0070] The above content is a further detailed description of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present invention is only limited to these descriptions. For those of ordinary skill in the technical field to which the present invention belongs, without departing from the concept of the present invention, several simple deductions or substitutions can still be made, and all should be regarded as belonging to the protection scope of the present invention.

Claims

1. A circuit breaker, comprising a breaking pole circuit and an operating mechanism OM. The breaking pole circuit includes an input terminal T1, an output terminal T2, and a main contact mechanism connected in series between the input terminal T1 and the output terminal T2. The main contact mechanism includes a moving main contact MC1 and a stationary main contact SC1 used in cooperation; characterized in that: The circuit breaker further includes a first signal assembly. The first signal assembly includes a first signal terminal ST1 and an auxiliary contact mechanism. The auxiliary contact mechanism includes an auxiliary moving contact MC2 and an auxiliary static contact SC2 that are used in cooperation. The first signal terminal ST1 is connected to the output terminal T2 through the auxiliary contact mechanism. The operating mechanism OM is respectively in driving cooperation with the main contact mechanism and the auxiliary contact mechanism. The operating mechanism OM drives the main contact mechanism to close and the auxiliary contact mechanism to open, or the operating mechanism OM drives the main contact mechanism to open and the auxiliary contact mechanism to close. The first signal terminal ST1 is used to determine whether the main contact mechanism is welded.

2. The circuit breaker according to claim 1, characterized in that: After the circuit breaker performs a tripping operation, if the first signal terminal ST1 outputs a signal, it is determined that the main contact mechanism is welded. If the first signal terminal ST1 does not output a signal, it is determined that the main contact mechanism is not welded.

3. The circuit breaker according to claim 1, characterized in that: The auxiliary contact mechanism is driven to close / open by the operating mechanism OM or the main moving contact MC1.

4. The circuit breaker according to claim 3, characterized in that: The driving end of the auxiliary contact mechanism is located on the moving path of the operating mechanism OM or the main moving contact MC1 when the circuit breaker closes or trips.

5. The circuit breaker according to claim 1, characterized in that: When the circuit breaker closes, the operating mechanism OM drives the main contact mechanism to close and the auxiliary contact mechanism to open. When the circuit breaker trips, the operating mechanism OM drives the main contact mechanism to open and the auxiliary contact mechanism to close.

6. The circuit breaker according to claim 3, characterized in that: The auxiliary contact mechanism is a microswitch.

7. The circuit breaker according to claim 1, characterized in that: The first signal assembly further includes a current-limiting resistor R1. The first signal terminal ST1 is connected in series with the auxiliary contact mechanism through the current-limiting resistor R1.

8. The circuit breaker according to claim 1, characterized in that: The circuit breaker further includes a second signal assembly. The second signal assembly includes a second signal terminal ST2. The second signal terminal ST2 is connected to the output terminal T2. The second signal terminal ST2 is used to determine the closed and open states of the main contact mechanism.

9. The circuit breaker according to claim 8, characterized in that: The second signal assembly further includes a current-limiting resistor R2. The second signal terminal ST2 is connected to the output terminal T2 through the current-limiting resistor R2.

10. The circuit breaker according to claim 8, characterized in that: After the circuit breaker performs a tripping operation, if the first signal terminal ST1 outputs a signal or both the first signal terminal ST1 and the second signal terminal ST2 output signals, it is determined that the main contact mechanism is welded. If the first signal terminal ST1 has no signal output and the second signal terminal ST2 outputs a signal, it is determined that the main contact mechanism is closed. If the first signal terminal ST1 has no signal output and the second signal terminal ST2 has no signal output, it is determined that the main contact mechanism is open.

11. The circuit breaker according to claim 1, wherein: The circuit breaker further includes a direct-through pole circuit. The direct-through pole circuit includes an input terminal T3, an output terminal T4, and a direct-through pole conductor connected in series between the input terminal T3 and the output terminal T4.

12. A power distribution system, characterized in that, It includes the circuit breaker according to any one of claims 1-11. The power distribution system further includes a power source and a load Load, which are respectively connected to the input end and the output end of the circuit breaker. The power source is a DC power source DC or an AC power source AC.

13. The power distribution system according to claim 12, wherein: The circuit breaker further includes a direct-through pole circuit. The direct-through pole circuit includes an input terminal T3, an output terminal T4, and a direct-through pole conductor connected in series between the input terminal T3 and the output terminal T4. The power source is respectively connected to the input terminal T1 and the input terminal T3, and the load Load is respectively connected to the output terminal T2 and the output terminal T4.

14. A signal detection system, characterized in that, It includes the power distribution system described in claim 12; the signal detection system further includes a first signal detection device V1, and the first signal detection device V1 is connected to the first signal terminal ST1 to determine whether the main contact mechanism of the circuit breaker is welded.

15. The signal detection system according to claim 14, wherein: The circuit breaker further includes a second signal component, the second signal component includes a second signal terminal ST2, and the second signal terminal ST2 is connected to the output terminal T2; The signal detection system further includes a second signal detection device V2, and the second signal detection device V2 is connected to the second signal terminal ST2 to determine the closed and open states of the main contact mechanism.

16. The signal detection system according to claim 14 or 15, characterized in that: The circuit breaker further includes a through-pole circuit, the through-pole circuit includes an input terminal T3, an output terminal T4, and a through-pole conductor connected in series between the input terminal T3 and the output terminal T4; the input terminal T1 and the input terminal T3 are respectively connected to a power supply, the output terminal T2 and the output terminal T4 are respectively connected to a load Load, and the first signal detection device V1 is connected between the first signal terminal ST1 and the input terminal T3; the signal detection system further includes a second signal detection device, and the signal detection device is connected between the second signal terminal ST2 and the input terminal T3.

Images