A circuit breaker overload closing interval time controller system

Abstract

The application relates to the technical field of circuit breaker overload, in particular to a circuit breaker overload closing interval time controller system which comprises a power module, a temperature switch, a power-off delay relay and a power-on delay relay are connected to the power module, the temperature switch is connected with the power-off delay relay, an indicating lamp is arranged between the temperature switch and the power-off delay relay, the power-off delay relay and the power-on delay relay are connected in series, and an output relay is connected to the power-on delay relay; the output relay is connected with a trip coil and a thermal overload protection structure, the temperature switch is connected with the thermal overload protection structure, and a circuit breaker is connected to the power module. Therefore, the circuit breaker overload closing interval time controller system can solve the technical problem that the existing traditional controller often adopts fixed delay time setting and cannot be flexibly adjusted according to the actual operation state and working condition of equipment.

Description

Technical Field

[0001] This application relates to the field of circuit breaker overload technology, and more specifically, to a circuit breaker overload closing interval time controller system. Background Technology

[0002] In power systems, circuit breakers, as critical electrical protection devices, bear the important responsibility of promptly cutting off current and protecting circuits and equipment safety when faults such as overloads and short circuits occur. However, in practical applications, the problem of circuit breakers frequently closing after overload protection is becoming increasingly prominent, posing a serious threat to the stable operation of power systems and the safety of equipment.

[0003] While existing technologies have achieved some control over the closing interval of circuit breakers, several shortcomings remain in practical applications. Specifically, traditional controllers often use fixed delay time settings, which cannot be flexibly adjusted according to the actual operating status and conditions of the equipment. This results in the controller setting an excessively long delay time when the equipment is under mild overload or favorable operating conditions, affecting the power supply reliability of the power system; conversely, the controller setting an excessively short delay time when the equipment is under severe overload or unfavorable operating conditions, failing to effectively prevent damage to the equipment caused by frequent reclosing.

[0004] In addition, traditional controllers often rely on complex current detection circuits or sensors to detect equipment overload conditions. This not only increases the complexity and cost of the controller, but may also cause the controller to malfunction or fail due to faults or errors in the detection circuit. Utility Model Content

[0005] Based on the above problems, this application proposes a circuit breaker overload closing interval time controller system to solve the technical problem that existing traditional controllers often use fixed delay time settings and cannot be flexibly adjusted according to the actual operating status and working conditions of the equipment.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0007] A circuit breaker overload closing interval time controller system includes a power supply module. A temperature switch, a power-off delay relay, and a power-on delay relay are connected to the power supply module. The temperature switch is connected to the power-off delay relay, and an indicator light is provided between the temperature switch and the power-off delay relay. The power-off delay relay and the power-on delay relay are connected in series. An output relay is connected to the power-on delay relay. The output relay is connected to a trip coil and a thermal overload protection structure. The temperature switch is connected to the thermal overload protection structure. A circuit breaker is connected to the power supply module.

[0008] In one specific implementation, the thermal overload protection structure is equipped with a temperature detection switch.

[0009] In one specific implementation, the normally open contact of the power-off delay relay and the normally closed contact of the power-on delay relay are connected in series in the coil circuit of the output relay.

[0010] In one specific implementation, the temperature switch is a normally open temperature switch with its operating temperature set in the range of 60℃-90℃.

[0011] In one specific implementation, the delay time of the power-off delay relay is adjustable from 0 to 30 minutes; the delay time of the power-on delay relay is set to less than 1 second.

[0012] In one specific implementation, the power supply module is an AC / DC conversion module with an input voltage range covering the circuit breaker's operating voltage.

[0013] The positive effects of this utility model are:

[0014] This system achieves flexible control of the closing interval time by using a combination of power-off delay relays and power-on delay relays, and by adjusting the delay time of the power-off delay relays. Specifically, when the circuit breaker trips due to overload, the power-off delay relay begins timing. After the set delay time is reached, its normally open contact closes, connecting the coil circuit of the power-on delay relay. The power-on delay relay then begins timing, and after its set delay time (less than 1 second) is reached, its normally closed contact opens, cutting off the coil circuit of the output relay, causing the output relay to release, thereby controlling the closing operation of the circuit breaker. Because the delay time of the power-off delay relay is adjustable (0-30 minutes), the system can flexibly adjust the closing interval time according to the actual operating status and conditions of the equipment. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0016] Figure 1 This is a system diagram of the present invention;

[0017] Explanation of reference numerals in the attached figures

[0018] 1. Power supply module; 2. Temperature switch; 3. Power-off delay relay; 4. Power-on delay relay; 5. Trip coil; 6. Indicator light; 7. Output relay; 8. Circuit breaker. Detailed Implementation

[0019] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0020] Example 1

[0021] like Figure 1 As shown, this embodiment discloses an overload closing interval controller system for a circuit breaker 8. The system includes a power supply module 1, on which a temperature switch 2, a power-off delay relay 3, and a power-on delay relay 4 are connected. The temperature switch 2 is connected to the power-off delay relay 3, and an indicator light 6 is provided between the temperature switch 2 and the power-off delay relay 3 to indicate the system's operating status. The power-off delay relay 3 and the power-on delay relay 4 are connected in series to form a delay control loop. An output relay 7 is connected to the power-on delay relay 4 to control the closing operation of the circuit breaker 8. The output relay 7 is further connected to a trip coil 5 and a thermal overload protection structure. The temperature switch 2 is connected to the thermal overload protection structure. Simultaneously, the circuit breaker 8 is also connected to the power supply module 1 to achieve comprehensive control of the circuit breaker 8.

[0022] Traditional controllers use fixed delay time settings, which cannot be flexibly adjusted according to the actual operating status and conditions of the equipment, affecting power supply reliability and equipment safety. This embodiment achieves flexible control of the closing interval time by using a combination of power-off delay relay 3 and power-on delay relay 4. The delay time of power-off delay relay 3 is adjustable from 0 to 30 minutes, which can be flexibly adjusted according to the actual operating status and conditions of the equipment. When the equipment overload is minor or the operating conditions are good, the delay time can be shortened to restore power supply as quickly as possible and improve the power supply reliability of the power system; when the equipment overload is severe or the operating conditions are poor, the delay time can be extended to avoid damage to the equipment caused by frequent reclosing and protect the equipment safety.

[0023] Traditional controllers rely on complex current detection circuits or sensors, which increases the complexity and cost of the controller and may cause malfunctions or failures due to faults or errors in the detection circuit.

[0024] In this embodiment, a temperature switch 2 is used as an overload detection element, replacing a complex current detection circuit or sensor. The temperature switch 2 can directly detect the temperature of the circuit breaker 8 or related equipment. When the temperature exceeds the set value, the temperature switch 2 activates, triggering subsequent control logic.

[0025] It simplifies the system structure, reduces costs, and improves the system's reliability and stability, while reducing the possibility of controller malfunction or failure due to detection circuit faults or errors.

[0026] Example 2

[0027] Based on Example 1, this embodiment further specifies that a temperature detection switch is installed on the thermal overload protection to enhance the detection capability of the equipment overload state; it enhances the system's ability to detect the equipment overload state, further protects the safety of the equipment, and improves the stability of the power system.

[0028] The normally open contact of the power-off delay relay 3 and the normally closed contact of the power-on delay relay 4 are connected in series in the coil circuit of the output relay 7.

[0029] To ensure the time-delay relays operate according to the set logical sequence, precise control of the closing interval is achieved. The normally open contact of the power-off time-delay relay 3 is connected in series in the coil circuit of the power-on time-delay relay 4, and the normally closed contact of the power-on time-delay relay 4 is connected in series in the coil circuit of the output relay 7. This connection method ensures that after the power-off time-delay relay 3 reaches the set delay time, it can trigger the power-on time-delay relay 4 to start timing, and after the power-on time-delay relay 4 reaches the set delay time, it can disconnect the coil circuit of the output relay 7, thereby controlling the closing operation of the circuit breaker 8.

[0030] The temperature switch 2 is a normally open type, with its operating temperature set within the range of 60℃-90℃; the delay time of the power-off delay relay 3 is adjustable from 0 to 30 minutes; the delay time of the power-on delay relay 4 is set to less than 1 second; the power supply module 1 is an AC / DC conversion module, with an input voltage range covering the operating voltage of the circuit breaker 8. Setting the operating temperature of the temperature switch 2 within the range of 60℃-90℃ covers both the normal operating temperature range of the equipment and ensures timely activation of the protection mechanism in case of overload.

[0031] The detection accuracy of temperature switch 2 has been improved, ensuring that the system can take timely protective measures when the equipment is overloaded, thus protecting the safety of the equipment.

[0032] The delay time of the power-on delay relay 4 is set to less than 1 second. This time range ensures that the power-off delay relay 3 has enough time to complete the timing, and also ensures that the coil circuit of the output relay 7 is quickly cut off after the power-on delay relay 4 reaches the set delay time.

[0033] This avoids damage to equipment caused by frequent reclosing, protects equipment safety, and improves the stability of the power system.

[0034] Power module 1 is configured as an AC / DC conversion module, with an input voltage range covering the operating voltage of circuit breaker 8. This power module 1 can convert AC power to DC power, providing a stable and reliable power supply for the entire system.

[0035] This ensures the stable operation of the system, improves its reliability and stability, and reduces its complexity and cost.

[0036] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only 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.

[0037] The above description of the disclosed embodiments enables those skilled in the art to make or use this application. 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 this application. Therefore, this application 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.

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