A circuit breaker anti-jump function self-checking circuit and anti-jump self-checking device

Abstract

The application discloses a circuit and device for self-checking anti-jumping function of a circuit breaker, and relates to the field of circuit breaker testing. The short-circuiting control circuit comprises a first branch, a second branch, a first connecting terminal and a second connecting terminal. The short-circuiting control circuit comprises a start switch, a first control module and a first normally closed switch. The delay reset circuit comprises a second control module, a third connecting terminal and a fourth connecting terminal. After the start switch is triggered, the first control module is powered to control the second normally open switch and the first normally closed switch to switch the switch state in sequence, thereby realizing reliable checking of whether the anti-jumping function is effective. The energy storage node is directly connected to the circuit, and the second control module resets the first control module according to the working characteristics of the energy storage node, thereby facilitating smooth checking work next time. The whole scheme has high automation degree, does not need manual participation, saves labor cost, has low checking risk and high test success rate, and is beneficial to ensuring reliable work of the circuit breaker.

Description

Technical Field

[0001] This invention relates to the field of circuit breaker testing technology, and in particular to a circuit breaker anti-pumping function self-verification circuit and anti-pumping self-verification device. Background Technology

[0002] Circuit breakers are crucial devices in power systems used to interrupt faults and ensure safe system operation. A common issue during circuit breaker operation, especially during fault conditions, is circuit breaker tripping. This occurs when, after manual closing or automatic reclosing, the corresponding manual or automatic closing contacts become stuck and cannot return to their normal position. Since the fault still exists, the circuit breaker will trip again due to the fault protection mechanism activating during closing. Furthermore, if an energy storage node is installed on the circuit corresponding to the closing coil, the closing signal may still be present after the energy storage node has finished storing energy, leading to repeated closing and opening tripping of the circuit breaker. To address this, an anti-tripping circuit is added to the circuit breaker's control loop to prevent repeated tripping.

[0003] To ensure the anti-pumping function can be effectively implemented, the anti-pumping circuit needs to be tested. Currently, there are two main ways to conduct the test. The first method involves two people working together. After energy storage is completed, they use a short-circuit to short-close the closing and opening terminals. When the circuit breaker closes after a fault, the anti-pumping circuit is activated. The anti-pumping circuit is intended to cut off the closing circuit, making it impossible to close. After energy storage is completed, the anti-pumping test ends. However, this approach has several drawbacks. Firstly, it involves high labor costs, especially for circuit breakers with voltage levels of 110kV, 220kV, or higher, where more people are typically needed for anti-pumping tests. Secondly, the success rate is low and the risks are high. The aforementioned test requires close cooperation between two people to perform the short circuit. If there is any shaking or poor contact during the wiring process, the test will fail. Furthermore, since the positive power supply and terminals are shorted, any loose or incorrect connection during the manual short circuit can cause malfunctions or grounding short circuits, posing a risk of personal injury. The second approach relies on manual monitoring of the energy storage node's switching status. After energy storage is complete, a fault current is applied using a tester to simulate a fault. After shorting the closing terminal with a short line, the fault is triggered, activating the anti-pumping mechanism. After tripping, the circuit breaker remains closed until the energy storage node is confirmed to have completed energy storage and closes, ending the test. However, this approach still requires human intervention. One person is responsible for observing the energy storage node's status, while another operates the tester. Moreover, this method of continuously observing the energy storage node's status before conducting the test results in a longer testing time.

[0004] Therefore, how to provide an effective circuit breaker anti-pumping function verification scheme is an urgent problem to be solved. Summary of the Invention

[0005] In view of this, the present invention provides a circuit breaker anti-pumping function self-verification circuit and anti-pumping self-verification device, which can reliably verify whether the anti-pumping function is effective. The entire verification scheme has a high degree of automation, saves labor costs, has low verification risk and high test success rate, which helps to ensure the reliable operation of the circuit breaker.

[0006] To address the aforementioned technical problems, this application provides a self-verification circuit for the anti-pumping function of a circuit breaker, comprising a short-circuit circuit, a short-circuit control circuit, and a time-delay reset circuit. The short-circuit circuit includes a first branch, a second branch, a first terminal, and a second terminal. The first branch includes a first normally open switch, and the second branch includes a second normally open switch. The short-circuit control circuit includes a start switch, a first control module, and a first normally closed switch. The time-delay reset circuit includes a second control module, a third terminal, and a fourth terminal. The first terminal is connected to a trigger terminal that controls the manual closing action of the circuit breaker, and the second terminal is connected to a trigger terminal that controls the manual opening action of the circuit breaker. The third and fourth terminals are connected to the energy storage node of the circuit breaker.

[0007] The first end of the first branch, the first end of the second branch, the first end of the start switch, the first end of the first control module, and the first end of the second control module are connected to the positive output terminal of the power supply. The second end of the first branch is connected to the first terminal, and the second end of the second branch is connected to the second terminal. The start switch, the first normally closed switch, and the second end of the first control module are connected in sequence. The third end of the first control module is connected to the second end of the second control module and the fourth terminal, respectively, and then connected to the negative output terminal of the power supply. The third end of the second control module is connected to the third terminal.

[0008] The first control module is energized after the start switch is triggered, so as to sequentially control the second normally open switch and the first normally open switch to switch their states. The energy storage node is disconnected and re-stores energy when the closing coil of the circuit breaker is energized, so as to reclose after the energy storage is completed. The second control module is used to control the first normally closed switch to switch its state after a preset delay when the first normally open switch completes the switch state switching and the energy storage node recloses, so as to de-energize and reset the first control module, thereby resetting both the first normally open switch and the second normally open switch.

[0009] Furthermore, the first branch also includes a first current-limiting resistor connected in series with the first normally open switch;

[0010] And / or, the second branch also includes a second current-limiting resistor connected in series with the second normally open switch.

[0011] Furthermore, the first branch also includes a first light-emitting component connected in series with the first normally open switch;

[0012] And / or, the second branch further includes a second light-emitting component connected in series with the second normally open switch;

[0013] And / or, the short-circuit control circuit further includes a third light-emitting component connected in series with the first normally closed switch.

[0014] Furthermore, the start switch is configured to be turned on when pressed and turned off when not pressed.

[0015] The first control module includes a first electromagnetic switch and a second electromagnetic switch and a third electromagnetic switch, both of which have a delay function; wherein, the first delay duration corresponding to the second electromagnetic switch is greater than the second delay duration corresponding to the third electromagnetic switch; the first normally open switch is the first normally open contact of the second electromagnetic switch, and the second normally open switch is the normally open contact of the third electromagnetic switch;

[0016] The first normally open contact of the first electromagnetic switch is connected in parallel with the start switch for self-locking after the start switch is pressed; the second normally open contact of the first electromagnetic switch is connected in series with the second coil corresponding to the second electromagnetic switch to obtain a third branch; the third normally open contact of the first electromagnetic switch is connected in series with the third coil corresponding to the third electromagnetic switch to obtain a fourth branch.

[0017] One end of the third branch and one end of the fourth branch are connected to form the first end of the first control module. The other end of the third branch, the other end of the fourth branch, and one end of the first coil corresponding to the first electromagnetic switch are connected to form the third end of the first control module. The other end of the first coil is the second end of the first control module.

[0018] Furthermore, the first control module also includes a fourth electromagnetic switch with a delay function, and the second branch also includes a normally closed contact of the fourth electromagnetic switch connected in series with the normally open contact of the third electromagnetic switch.

[0019] The second normally open contact of the second electromagnetic switch is connected in series with the fourth coil corresponding to the fourth electromagnetic switch to form a fifth branch;

[0020] One end of the third branch, one end of the fourth branch, and one end of the fifth branch are connected to form the first end of the first control module. The other end of the third branch, the other end of the fourth branch, the other end of the fifth branch, and one end of the first coil are connected to form the third end of the first control module.

[0021] Furthermore, the second control module includes a fifth electromagnetic switch, a sixth electromagnetic switch, a seventh electromagnetic switch, an eighth electromagnetic switch, and a ninth electromagnetic switch and a tenth electromagnetic switch with a time delay function; wherein, the first normally closed switch is the normally closed contact of the tenth electromagnetic switch; the third time delay corresponding to the ninth electromagnetic switch causes the normally closed contact of the ninth electromagnetic switch to switch state after the first normally open contact of the second electromagnetic switch switches to the closed state, and before the energy storage node closes again;

[0022] The fourth normally open contact of the first electromagnetic switch is connected in series with the first normally open contact of the fifth electromagnetic switch to form a first series branch. The first series branch is connected in parallel with the normally open contact of the eighth electromagnetic switch to form a first parallel branch. The sixth coil corresponding to the sixth electromagnetic switch is connected in series with the normally closed contact of the ninth electromagnetic switch to form a second series branch. The eighth coil corresponding to the eighth electromagnetic switch is connected in series with the ninth coil corresponding to the ninth electromagnetic switch to form a third series branch. The second series branch is connected in parallel with the third series branch to form a second parallel branch. The first parallel branch is connected in series with the second parallel branch to form a sixth branch.

[0023] The seventh coil corresponding to the seventh electromagnetic switch is connected in series with the normally open contact of the sixth electromagnetic switch to obtain the seventh branch. The tenth coil corresponding to the tenth electromagnetic switch, the normally closed contact of the seventh electromagnetic switch, and the second normally open contact of the fifth electromagnetic switch are connected in series to obtain the eighth branch. One end of the sixth branch, one end of the seventh branch, one end of the eighth branch, and one end of the fifth coil corresponding to the fifth electromagnetic switch are connected to form the first end of the second control module. The other end of the fifth coil is the third end of the second control module. The other end of the sixth branch, the other end of the seventh branch, and the other end of the eighth branch are connected to form the second end of the second control module.

[0024] Furthermore, it also includes a ninth branch, one end of which is connected to the positive output terminal of the power supply, and the other end of which is connected to the negative output terminal of the power supply.

[0025] The ninth branch includes a fourth light-emitting component connected in series and the normally open contact of the tenth electromagnetic switch.

[0026] Furthermore, the ninth branch also includes a third current-limiting resistor connected in series with the normally open contact of the fourth light-emitting component and the tenth electromagnetic switch.

[0027] To solve the above-mentioned technical problems, the present invention also provides an anti-pumping self-verification device, including a housing and a circuit breaker anti-pumping function self-verification circuit as described above, disposed within the housing.

[0028] Furthermore, the housing is also provided with a positive DC input port and a negative DC input port for connecting a power supply to the self-verification circuit of the circuit breaker's anti-pumping function.

[0029] This application provides a circuit breaker anti-pumping function self-verification circuit and anti-pumping self-verification device. The circuit includes a short-circuit circuit, a short-circuit control circuit, and a time-delay reset circuit. The short-circuit circuit includes a first branch, a second branch, a first terminal, and a second terminal. The short-circuit control circuit includes a start switch, a first control module, and a first normally closed switch. The time-delay reset circuit includes a second control module, a third terminal, and a fourth terminal. The first terminal is used to connect to the trigger terminal for controlling the manual closing node, the second terminal is used to connect to the trigger terminal for controlling the manual opening node, and the third and fourth terminals are used to connect to the energy storage node. After the start switch is triggered, the first control module is energized to control the second normally open switch and the first normally open switch to switch states sequentially. When the second normally open switch switches, the manual opening node is triggered, causing the circuit breaker to receive a tripping control signal and trip. When the first normally open switch switches, the manual closing node is triggered, causing the circuit breaker to receive a closing control signal. The circuit breaker trips again because the second normally open switch remains closed, causing the circuit breaker to trip again. Before the circuit breaker closes due to the still-present closing control signal, the anti-pumping function will activate normally under fault-free conditions, preventing the circuit breaker from closing again. However, if the anti-pumping function malfunctions, the circuit breaker will repeatedly switch between opening and closing, failing to achieve anti-pumping. This demonstrates that the scheme can reliably verify the effectiveness of the anti-pumping function. Furthermore, directly connecting the energy storage node to the circuit eliminates the need for additional personnel to monitor its operating status. The second control module can reset the first control module upon power failure based on the operating characteristics of the energy storage node, facilitating the smooth progress of subsequent verification work. The entire verification scheme has a high degree of automation, and the verification process requires no manual intervention, saving labor costs. The verification risk is low, and the test success rate is high, ensuring the reliable operation of the circuit breaker and facilitating practical applications.

[0030] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application, it can be implemented according to the contents of the specification. In order to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0031] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments of this application and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0032] Figure 1 This invention provides a schematic diagram of the structure of a circuit breaker anti-pumping function self-verification circuit;

[0033] Figure 2 A schematic diagram of another circuit breaker anti-pumping function self-verification circuit provided by the present invention;

[0034] Figure 3 This is a schematic diagram of the structure of an anti-jump self-calibration device provided by the present invention. Detailed Implementation

[0035] The core of this invention is to provide a circuit breaker anti-pumping function self-verification circuit and anti-pumping self-verification device, which can reliably verify whether the anti-pumping function is effective. The entire verification scheme has a high degree of automation, saves labor costs, has low verification risk and high test success rate, which helps to ensure the reliable operation of the circuit breaker.

[0036] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0037] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0038] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the structure of a circuit breaker anti-pumping function self-verification circuit provided by the present invention.

[0039] The circuit breaker's anti-pumping function self-verification circuit includes a short-circuit circuit, a short-circuit control circuit, and a time-delay reset circuit. The short-circuit circuit includes a first branch, a second branch, a first terminal e, and a second terminal d. The first branch includes a first normally open switch S1, and the second branch includes a second normally open switch S2. The short-circuit control circuit includes a start switch S3, a first control module 1, and a first normally closed switch S4. The time-delay reset circuit includes a second control module 2, a third terminal f, and a fourth terminal g. The first terminal e is used to connect to the trigger terminal that controls the operation of the circuit breaker's manual closing node, and the second terminal d is used to connect to the trigger terminal that controls the operation of the circuit breaker's manual opening node. The third terminal f and the fourth terminal g are used to connect to the circuit breaker's energy storage node S5.

[0040] The first end of the first branch, the first end of the second branch, the first end of the start switch S3, the first end of the first control module 1, and the first end of the second control module 2 are connected to the positive output terminal DC+ of the power supply. The second end of the first branch is connected to the first terminal e, and the second end of the second branch is connected to the second terminal d. The start switch S3, the first normally closed switch S4, and the second end of the first control module 1 are connected in sequence. The third end of the first control module 1 is connected to the second end of the second control module 2 and the fourth terminal g, respectively, and then connected to the negative output terminal DC- of the power supply. The third end of the second control module 2 is connected to the third terminal f.

[0041] The first control module 1 is energized after the start switch S3 is triggered, so as to control the second normally open switch S2 and the first normally open switch S1 to switch their states sequentially; the energy storage node S5 is used to disconnect and re-store energy when the closing coil of the circuit breaker is energized, so as to re-close after the energy storage is completed; the second control module 2 is used to control the first normally closed switch S4 to switch its state after a preset delay when the first normally open switch S1 completes the switch state switching and the energy storage node S5 re-closes, so as to de-energize and reset the first control module 1, thereby resetting both the first normally open switch S1 and the second normally open switch S2.

[0042] In this embodiment, the circuit breaker here includes, but is not limited to, a circuit breaker used in a substation; the control circuit of the circuit breaker includes a closing circuit and a tripping circuit, wherein the closing circuit is provided with a manual closing node, an anti-pumping circuit, an energy storage node S5 and a closing coil, and the tripping circuit is provided with a manual tripping node and a tripping coil; the energy storage node S5 closes after energy storage is completed, and when the closing coil is energized and closed, the energy storage node S5 will open and restart energy storage, so as to close again after energy storage is completed.

[0043] The first normally closed switch S4 is controlled by the second control module 2, and the first normally open switch S1 and the second normally open switch S2 are controlled by the first control module 1. From the perspective of implementation principle, after the start switch S3 is triggered, the test begins. The first control module 1 is energized and sequentially controls the second normally open switch S2 and the first normally open switch S1 to perform a switch state switch. Specifically, the first control module 1 first controls the second normally open switch S2 to perform a switch state switch, that is, switches the second normally open switch S2 to the closed state. At this time, the manual trip node is triggered, causing the circuit breaker to receive a trip control signal and trip. Subsequently, the first control module 1 controls the first normally open switch S1 to perform a switch state switch. The switching process involves switching the first normally open switch S1 to the closed state. At this time, the manual closing node is triggered, causing the circuit breaker to receive a closing control signal and close. However, since the second normally open switch S2 is closed at this time, the tripping control signal still exists, and the circuit breaker trips again. Before the circuit breaker closes due to the still existing closing control signal, the anti-pumping function will start normally under fault-free conditions, preventing the circuit breaker from continuing to close. Throughout the process, the circuit breaker exhibits a trip-close-trip-non-close state. However, if the anti-pumping function malfunctions, the circuit breaker will repeatedly switch between opening and closing, indicating that the anti-pumping function cannot be implemented. It can be seen that this scheme can reliably verify whether the anti-pumping function is effective.

[0044] The energy storage node S5 is directly connected to the self-calibration circuit through the third terminal f and the fourth terminal g, eliminating the need for additional personnel to monitor the working status of the energy storage node S5. The second control module 2 realizes the power failure reset of the first control module 1 based on the above-mentioned working characteristics of the energy storage node S5, and realizes the anti-jump test when the energy storage node S5 closes again due to the completion of energy storage, which is conducive to the smooth progress of the next calibration work.

[0045] It should be noted that the power supply here can be 220V DC to power the short-circuit circuit, short-circuit control circuit, and time-delay reset circuit. The first terminal e to the fourth terminal g facilitate effective and reliable connections with the manual closing node, manual opening node, and energy storage node S5, respectively, preventing loose connections and ensuring high safety and reliability. When this circuit is specifically installed in the anti-pumping self-calibration device, please refer to... Figure 3 , Figure 3 This is a schematic diagram of the anti-jump self-calibration device provided by the present invention. The first terminal e to the fourth terminal g can be connected to terminals on the outer casing a for technicians to connect before the test begins. Each terminal can be distinguished by different text markings to effectively prevent incorrect wiring. Similarly, the start switch S3 can be externalized as a start button, so that the start switch S3 is turned on when the button is pressed.

[0046] It should also be noted that before the start switch S3 is triggered, the energy storage node S5 has already closed due to the completion of energy storage; in addition, the trip-close-trip-non-close status of the circuit breaker can be intuitively displayed at the control circuit of the circuit breaker. Of course, a corresponding prompt module can also be set to indicate whether the test was successful or not, without any special limitation here.

[0047] In summary, this application provides a self-verification circuit for the anti-pumping function of a circuit breaker, which can reliably verify whether the anti-pumping function is effective. The entire verification scheme has a high degree of automation, and the verification process does not require manual intervention, saving labor costs and reducing verification time. The verification has low risk and a high success rate, and is highly operable, which helps ensure the reliable operation of the circuit breaker. It is also easy to integrate into the anti-pumping self-verification device and is beneficial for practical applications.

[0048] Based on the above embodiments:

[0049] Please refer to Figure 2 , Figure 2 This is a schematic diagram of another circuit breaker anti-pumping function self-verification circuit provided by the present invention.

[0050] In some embodiments, the first branch further includes a first current-limiting resistor R1 connected in series with the first normally open switch S1;

[0051] And / or, the second branch also includes a second current-limiting resistor R2 connected in series with the second normally open switch S2.

[0052] In this embodiment, the first current-limiting resistor R1 and the second current-limiting resistor R2 can be adjustable resistors, allowing for flexible adjustment of their resistance values ​​according to actual needs. These resistors include, but are not limited to, sliding rheostats. As can be seen, the above configuration allows for current-limiting protection of the closing coil via the first current-limiting resistor R1 and current-limiting protection of the opening coil via the second current-limiting resistor R2, preventing excessive current from burning out the coil.

[0053] In some embodiments, the first branch further includes a first light-emitting component connected in series with the first normally open switch S1;

[0054] And / or, the second branch also includes a second light-emitting component connected in series with the second normally open switch S2;

[0055] And / or, the short-circuit control circuit also includes a third light-emitting component connected in series with the first normally closed switch S4.

[0056] Specifically, the first light-emitting component can be a first light-emitting diode L1, the second light-emitting component can be a second light-emitting diode L2, and the third light-emitting component can be a third light-emitting diode L3. The first light-emitting diode L1 can emit light when the first normally open switch S1 is switched to the closed state to indicate that the first branch is currently conducting and the trigger signal for the contact node has been issued. The second light-emitting diode L2 can emit light when the second normally open switch S2 is switched to the closed state to indicate that the second branch is currently conducting and the trigger signal for the contact node has been issued. The third light-emitting diode L3 can emit light when the start switch S3 is triggered to indicate that the test has started (more specifically, when the first normally open contact of the first electromagnetic switch described in the following embodiment is connected in parallel with the start switch S3 to achieve self-locking, the third light-emitting diode L3 can remain lit until the first normally closed switch S4 is switched to the open state).

[0057] In addition, such as Figure 3 As shown, when the self-calibration circuit is installed in the anti-jump self-calibration device, a corresponding through hole can be provided on the outer casing a of the device, and the light-emitting part of each light-emitting component passes through the through hole and is exposed to the outside, so as to ensure that the light emitted by each light-emitting part can be perceived by the outside.

[0058] In some embodiments, the start switch S3 is configured to be turned on when pressed and turned off when not pressed.

[0059] The first control module 1 includes a first electromagnetic switch and a second electromagnetic switch and a third electromagnetic switch, both of which have a delay function; wherein, the first delay duration corresponding to the second electromagnetic switch is greater than the second delay duration corresponding to the third electromagnetic switch; the first normally open switch S1 is the first normally open contact K2s1 of the second electromagnetic switch, and the second normally open switch S2 is the normally open contact K3s of the third electromagnetic switch.

[0060] The first normally open contact K1s1 of the first electromagnetic switch is connected in parallel with the start switch S3 to perform self-locking after the start switch S3 is pressed; the second normally open contact K1s2 of the first electromagnetic switch is connected in series with the second coil K2c corresponding to the second electromagnetic switch to obtain the third branch; the third normally open contact K1s3 of the first electromagnetic switch is connected in series with the third coil K3c corresponding to the third electromagnetic switch to obtain the fourth branch.

[0061] One end of the third branch and one end of the fourth branch are connected to form the first end of the first control module 1. The other end of the third branch, the other end of the fourth branch, and one end of the first coil K1c corresponding to the first electromagnetic switch are connected to form the third end of the first control module 1. The other end of the first coil K1c is the second end of the first control module 1.

[0062] Specifically, the start switch S3 here can be a start button h with a spring-reset function, meaning it has an internal spring for resetting, so it can automatically reset after being pressed. More specifically, when this circuit is set in an anti-jump self-calibration device, the device can have a through hole so that the start button h can pass through the through hole and be exposed, allowing technicians to operate the switch button h. Figure 3 As shown.

[0063] From the perspective of implementation principle, when the start switch S3 is pressed, the first coil K1c is energized, and the first normally open contact K1s1 of the first electromagnetic switch switches to the closed state for self-locking, while the first normally closed switch S4 remains closed, thus achieving the energization and maintenance of the first control module 1. When the first coil K1c is energized, the second normally open contact K1s2 and the third normally open contact K1s3 of the first electromagnetic switch both turn to the closed state, thereby correspondingly energizing the second coil K2c and the third coil K3c. Since the first delay time of the second electromagnetic switch is longer than the second delay time of the third electromagnetic switch, when the second delay time is reached, the normally open contact K3s of the third electromagnetic switch switches to the closed state first, sending a trigger signal to the manual break node; when the first delay time is reached, the first normally open contact K2s1 of the second electromagnetic switch switches to the closed state, sending a trigger signal to the manual break node, thus reliably realizing the sequential control of the second normally open switch S2 and the first normally open switch S1, which can well simulate the actual field situation of breakage.

[0064] In some embodiments, the first control module 1 further includes a fourth electromagnetic switch with a delay function, and the second branch further includes a normally closed contact K4s of the fourth electromagnetic switch connected in series with the normally open contact K3s of the third electromagnetic switch.

[0065] The second normally open contact K2s2 of the second electromagnetic switch is connected in series with the fourth coil K4c of the fourth electromagnetic switch to form the fifth branch.

[0066] One end of the third branch, one end of the fourth branch, and one end of the fifth branch are connected to form the first end of the first control module 1. The other end of the third branch, the other end of the fourth branch, the other end of the fifth branch, and one end of the first coil K1c are connected to form the third end of the first control module 1.

[0067] In this embodiment, it is further considered that the current test schemes lack protection for the trip coil. For example, in the first method of the prior art described above, if the timing of the manual short circuit is not appropriate, the short circuit time will be too long, causing the trip coil of the circuit breaker to burn out. In the second method, the trip coil will be continuously energized during the test, so there is still a risk of burnout. Therefore, this application relies on the normally closed contact K4s of the fourth electromagnetic switch to achieve timely separation of the trip coil.

[0068] Specifically, when the first delay period is reached, the second normally open contact K2s2 of the second electromagnetic switch switches to the closed state, the fourth coil K4c is energized, and after its corresponding delay period, the normally closed contact K4s of the fourth electromagnetic switch switches to the open state, ensuring that the trip coil will not burn out due to prolonged energization.

[0069] In addition, there is no specific limit to the value of the fourth delay time corresponding to the fourth electromagnetic switch. It can be adjusted in advance according to the site conditions. However, the setting of the fourth delay time needs to ensure that the anti-pumping function works for a period of time so as not to affect the verification of the anti-pumping function.

[0070] In some embodiments, the second control module 2 includes a fifth electromagnetic switch, a sixth electromagnetic switch, a seventh electromagnetic switch, an eighth electromagnetic switch, and a ninth electromagnetic switch and a tenth electromagnetic switch with a time delay function; wherein, the first normally closed switch S4 is the normally closed contact K10s1 of the tenth electromagnetic switch; the third delay duration corresponding to the ninth electromagnetic switch causes the normally closed contact K9s of the ninth electromagnetic switch to switch state after the first normally open contact K2s1 of the second electromagnetic switch switches to the closed state and before the energy storage node S5 closes again.

[0071] The fourth normally open contact K1s4 of the first electromagnetic switch is connected in series with the first normally open contact K5s1 of the fifth electromagnetic switch to obtain the first series branch. The first series branch is connected in parallel with the normally open contact K8s of the eighth electromagnetic switch to obtain the first parallel branch. The sixth coil K6c of the sixth electromagnetic switch is connected in series with the normally closed contact K9s of the ninth electromagnetic switch to obtain the second series branch. The eighth coil K8c of the eighth electromagnetic switch is connected in series with the ninth coil K9c of the ninth electromagnetic switch to obtain the third series branch. The second series branch and the third series branch are connected in parallel to obtain the second parallel branch. The first parallel branch and the second parallel branch are connected in series to obtain the sixth branch.

[0072] The seventh coil K7c corresponding to the seventh electromagnetic switch is connected in series with the normally open contact K6s of the sixth electromagnetic switch to obtain the seventh branch. The tenth coil K10c corresponding to the tenth electromagnetic switch, the normally closed contact K7s of the seventh electromagnetic switch, and the second normally open contact K5s2 of the fifth electromagnetic switch are connected in series to obtain the eighth branch. One end of the sixth branch, one end of the seventh branch, one end of the eighth branch, and one end of the fifth coil K5c corresponding to the fifth electromagnetic switch are connected to form the first end of the second control module 2. The other end of the fifth coil K5c is the third end of the second control module 2. The other end of the sixth branch, the other end of the seventh branch, and the other end of the eighth branch are connected to form the second end of the second control module 2.

[0073] Specifically, from the perspective of implementation principle, when the start switch S3 is triggered, the first coil is energized, and the fourth normally open contact K1s4 of the first electromagnetic switch turns to the closed state. Since the energy storage node S5 is in the closed state at this time because energy storage has been completed, the fifth coil K5c is energized, and the first normally open contact K5s1 and the second normally open contact K5s2 of the fifth electromagnetic switch turn to the closed state. The sixth coil K6c, the eighth coil K8c, and the ninth coil K9c are all energized, and the normally open contact K8s of the eighth electromagnetic switch turns to the closed state. The normally open contact K6s of the sixth electromagnetic switch turns to the closed state. The seventh coil K7c is energized, and the normally closed contact K7s of the seventh electromagnetic switch turns to the open state. The tenth coil K10c is not energized, so that the normally closed contact K10s1 of the tenth electromagnetic switch remains closed normally, and the verification is carried out normally.

[0074] The ninth electromagnetic switch, as a switch with a time delay function, has a switching time point after the manual closing node is triggered but before the energy storage node S5 closes again due to energy storage completion. Therefore, when the third delay duration is reached, the normally closed contact K9s of the ninth electromagnetic switch opens, the sixth coil K6c de-energizes, and the normally open contact K6s of the sixth electromagnetic switch opens again. The seventh coil K7c de-energizes, and the normally closed contact K7s of the seventh electromagnetic switch closes again. However, since the anti-pumping function has been triggered and activated at this time, and the energy storage node S5 has not yet completed energy storage, the fifth coil K... If coil 5c remains de-energized and coil 10c remains de-energized, after the anti-pumping test, energy storage node S5 will close again, energizing coil 5c. The second normally open contact K5s2 of the fifth electromagnetic switch will turn closed, energizing coil 10c. Since the tenth electromagnetic switch is a time-delay switch, when the fifth preset time corresponding to the tenth electromagnetic switch is reached, the normally closed contact K10s1 of the tenth electromagnetic switch will turn open, causing coils 1, 2, 3, and 4 to all lose power, thus achieving a reliable reset of the first control module 1.

[0075] It should also be noted that, as an example, the first delay time corresponding to the second electromagnetic switch can be set to 0.5 seconds, the second delay time corresponding to the third electromagnetic switch can be set to 0.2 seconds, the fourth delay time corresponding to the fourth electromagnetic switch can be set to 1 second, the third delay time corresponding to the ninth electromagnetic switch can be set to 2.5 seconds, and the fifth delay time corresponding to the tenth electromagnetic switch can be set to 3.5 seconds. It should be understood that the above settings are only examples of delay time settings, and the specific delay time can be flexibly adjusted in advance according to the actual situation of the project site.

[0076] In some embodiments, a ninth branch is also included, one end of which is connected to the positive output terminal DC+ of the power supply, and the other end of which is connected to the negative output terminal DC- of the power supply.

[0077] The ninth branch includes the normally open contact K10s2 of the fourth light-emitting component and the tenth electromagnetic switch, which are connected in series.

[0078] Specifically, a ninth branch is also set up. When the fifth preset time is reached, the normally open contact K10s2 of the tenth electromagnetic switch turns to the closed state, and the fourth light-emitting component is energized and lights up, thus intuitively and reliably indicating the end of the anti-jump test.

[0079] More specifically, the fourth light-emitting component here includes, but is not limited to, a fourth light-emitting diode L4. When the circuit is installed in the anti-jump self-calibration device, a through hole can be provided on the outer casing a of the device so that the light-emitting part of the fourth light-emitting component can pass through the through hole and be exposed, so as to ensure that the light emitted by the light-emitting part can be perceived by the outside.

[0080] In some embodiments, the ninth branch also includes a third current-limiting resistor R3 connected in series with the normally open contact K10s2 of the fourth light-emitting component and the tenth electromagnetic switch.

[0081] Specifically, current limiting can be achieved through the third current-limiting resistor R3 to prevent excessive current from damaging the fourth light-emitting component.

[0082] Please refer to Figure 3 , Figure 3 This is a schematic diagram of the structure of an anti-jump self-calibration device provided by the present invention.

[0083] The anti-pumping self-calibration device includes a housing a, and also includes a circuit breaker anti-pumping function self-calibration circuit as described above, which is disposed within the housing a.

[0084] For a description of the anti-pumping self-calibration device provided in this application, please refer to the above embodiment of the circuit breaker anti-pumping function self-calibration circuit, which will not be repeated here.

[0085] In some embodiments, housing a is further provided with a positive DC input port b and a negative DC input port c, for connecting a power supply to the self-verification circuit for the circuit breaker's anti-pumping function.

[0086] Specifically, an external DC power supply can be connected to the self-calibration circuit through the positive DC input port b and the negative DC input port c to power the components in the circuit. It should be noted that the DC power supply can be 220V DC, which can be obtained on-site without the need for an additional converter to convert AC to DC, making it more convenient and practical.

[0087] It is understandable that, such as Figure 3As shown, the first terminal e, the second terminal d, the third terminal f, the fourth terminal g, the DC input positive port b, and the DC input negative port c can be externalized as terminals mounted on the housing a, so that technicians can make accurate connections according to the instructions.

[0088] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since it corresponds to the method disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to in the method section. Relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one" does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0089] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A self-verification circuit for the anti-pumping function of a circuit breaker, characterized in that, The circuit includes a short-circuit circuit, a short-circuit control circuit, and a time-delay reset circuit. The short-circuit circuit includes a first branch, a second branch, a first terminal, and a second terminal. The first branch includes a first normally open switch, and the second branch includes a second normally open switch. The short-circuit control circuit includes a start switch, a first control module, and a first normally closed switch. The time-delay reset circuit includes a second control module, a third terminal, and a fourth terminal. The first terminal is connected to the trigger terminal that controls the manual closing action of the circuit breaker, and the second terminal is connected to the trigger terminal that controls the manual opening action of the circuit breaker. The third and fourth terminals are connected to the energy storage node of the circuit breaker. The first end of the first branch, the first end of the second branch, the first end of the start switch, the first end of the first control module, and the first end of the second control module are connected to the positive output terminal of the power supply. The second end of the first branch is connected to the first terminal, and the second end of the second branch is connected to the second terminal. The start switch, the first normally closed switch, and the second end of the first control module are connected in sequence. The third end of the first control module is connected to the second end of the second control module and the fourth terminal, respectively, and then connected to the negative output terminal of the power supply. The third end of the second control module is connected to the third terminal. The first control module is energized after the start switch is triggered, so as to sequentially control the second normally open switch and the first normally open switch to switch the switch state; the energy storage node is used to disconnect and re-store energy when the closing coil of the circuit breaker is energized, so as to re-close after the energy storage is completed. The second control module is used to control the first normally closed switch to switch its state after a preset delay when the first normally open switch completes the switch state switching and the energy storage node is closed again, so that the first control module loses power and resets, thereby resetting both the first normally open switch and the second normally open switch.

2. The circuit breaker anti-pumping function self-verification circuit as described in claim 1, characterized in that, The first branch also includes a first current-limiting resistor connected in series with the first normally open switch; And / or, the second branch also includes a second current-limiting resistor connected in series with the second normally open switch.

3. The circuit breaker anti-pumping function self-verification circuit as described in claim 1, characterized in that, The first branch also includes a first light-emitting component connected in series with the first normally open switch; And / or, the second branch further includes a second light-emitting component connected in series with the second normally open switch; And / or, the short-circuit control circuit further includes a third light-emitting component connected in series with the first normally closed switch.

4. The circuit breaker anti-pumping function self-verification circuit as described in any one of claims 1 to 3, characterized in that, The start switch is used to turn on when pressed and to turn off when not pressed. The first control module includes a first electromagnetic switch and a second electromagnetic switch and a third electromagnetic switch, both of which have a delay function; wherein, the first delay duration corresponding to the second electromagnetic switch is greater than the second delay duration corresponding to the third electromagnetic switch; the first normally open switch is the first normally open contact of the second electromagnetic switch, and the second normally open switch is the normally open contact of the third electromagnetic switch; The first normally open contact of the first electromagnetic switch is connected in parallel with the start switch for self-locking after the start switch is pressed; the second normally open contact of the first electromagnetic switch is connected in series with the second coil corresponding to the second electromagnetic switch to obtain a third branch; the third normally open contact of the first electromagnetic switch is connected in series with the third coil corresponding to the third electromagnetic switch to obtain a fourth branch. One end of the third branch and one end of the fourth branch are connected to form the first end of the first control module. The other end of the third branch, the other end of the fourth branch, and one end of the first coil corresponding to the first electromagnetic switch are connected to form the third end of the first control module. The other end of the first coil is the second end of the first control module.

5. The circuit breaker anti-pumping function self-verification circuit as described in claim 4, characterized in that, The first control module also includes a fourth electromagnetic switch with a time delay function, and the second branch also includes a normally closed contact of the fourth electromagnetic switch connected in series with the normally open contact of the third electromagnetic switch. The second normally open contact of the second electromagnetic switch is connected in series with the fourth coil corresponding to the fourth electromagnetic switch to form a fifth branch; One end of the third branch, one end of the fourth branch, and one end of the fifth branch are connected to form the first end of the first control module. The other end of the third branch, the other end of the fourth branch, the other end of the fifth branch, and one end of the first coil are connected to form the third end of the first control module.

6. The circuit breaker anti-pumping function self-verification circuit as described in claim 4, characterized in that, The second control module includes a fifth electromagnetic switch, a sixth electromagnetic switch, a seventh electromagnetic switch, an eighth electromagnetic switch, and a ninth electromagnetic switch and a tenth electromagnetic switch with a time delay function; wherein, the first normally closed switch is the normally closed contact of the tenth electromagnetic switch; the third time delay corresponding to the ninth electromagnetic switch causes the normally closed contact of the ninth electromagnetic switch to switch state after the first normally open contact of the second electromagnetic switch switches to the closed state, and before the energy storage node closes again. The fourth normally open contact of the first electromagnetic switch is connected in series with the first normally open contact of the fifth electromagnetic switch to form a first series branch. The first series branch is connected in parallel with the normally open contact of the eighth electromagnetic switch to form a first parallel branch. The sixth coil corresponding to the sixth electromagnetic switch is connected in series with the normally closed contact of the ninth electromagnetic switch to form a second series branch. The eighth coil corresponding to the eighth electromagnetic switch is connected in series with the ninth coil corresponding to the ninth electromagnetic switch to form a third series branch. The second series branch is connected in parallel with the third series branch to form a second parallel branch. The first parallel branch is connected in series with the second parallel branch to form a sixth branch. The seventh coil corresponding to the seventh electromagnetic switch is connected in series with the normally open contact of the sixth electromagnetic switch to obtain the seventh branch. The tenth coil corresponding to the tenth electromagnetic switch, the normally closed contact of the seventh electromagnetic switch, and the second normally open contact of the fifth electromagnetic switch are connected in series to obtain the eighth branch. One end of the sixth branch, one end of the seventh branch, one end of the eighth branch, and one end of the fifth coil corresponding to the fifth electromagnetic switch are connected to form the first end of the second control module. The other end of the fifth coil is the third end of the second control module. The other end of the sixth branch, the other end of the seventh branch, and the other end of the eighth branch are connected to form the second end of the second control module.

7. The circuit breaker anti-pumping function self-verification circuit as described in claim 6, characterized in that, It also includes a ninth branch, one end of which is connected to the positive output terminal of the power supply, and the other end of which is connected to the negative output terminal of the power supply. The ninth branch includes a fourth light-emitting component connected in series and the normally open contact of the tenth electromagnetic switch.

8. The circuit breaker anti-pumping function self-verification circuit as described in claim 7, characterized in that, The ninth branch also includes a third current-limiting resistor connected in series with the normally open contact of the fourth light-emitting component and the tenth electromagnetic switch.

9. A self-calibrating device for preventing bouncing, characterized in that, It includes a housing, and also includes a circuit breaker anti-pumping function self-verification circuit as described in any one of claims 1 to 8 disposed within the housing.

10. The anti-jump self-calibration device as described in claim 9, characterized in that, The housing is also provided with a positive DC input port and a negative DC input port for connecting to a power supply that powers the circuit breaker's anti-pumping function self-verification circuit.

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