Spring operating mechanism circuit breaker energy storage abnormity protection method and system

Abstract

The invention discloses a spring operation mechanism circuit breaker energy storage abnormity protection method and system, and the method comprises the following steps: collecting a spring motion signal, and controlling a temperature sensor and a time relay to act according to the spring motion signal; the action execution of the temperature sensor is as follows: the temperature sensor collects the temperature of the energy storage motor and judges whether the temperature of the energy storage motor is higher than a preset temperature threshold, if yes, the energy storage motor is powered off, and if not, detection is continued; the action execution of the time relay is as follows: the time relay performs timing, performs delay control according to a preset time threshold value, and cuts off the power supply of the energy storage motor when the duration time of the action signal of the spring reaches the preset time threshold value. The beneficial effects of the invention are that the normal operation state of the energy storage motor when the spring moves and is static is compared with the actual operation state, the compensation of the preset operation time error of the motor is realized, and the temperature sensor and the time relay carry out staggered detection and mutual verification, thereby avoiding the problem that the power supply cannot be cut off in time due to the failure of single detection.

Description

Technical Field

[0001] The present application relates to the technical field of circuit breaker energy storage protection, and in particular to a method and system for protecting a circuit breaker from abnormal energy storage with a spring operating mechanism. Background Art

[0002] With the continuous development of social economy, the power load in the jurisdiction is increasing, and the requirements for safe operation of equipment are also increasing. However, due to the broken pins of the energy storage mechanical part, the chain falling off, the damage of the one-way clutch, the adhesion of the electrical circuit contacts, etc., the 35kV and below spring-operated mechanism circuit breakers are prone to cause the energy storage motor to idle for a long time, causing the temperature to rise and even the switch cabinet to catch fire. It will seriously damage the safety of equipment operation and cause huge economic losses. At present, when the energy storage motor of the 35kV and below spring-operated mechanism circuit breaker in the substation has been idling for a long time after the energy storage timeout, a fault signal will be sent to the monitoring, and then the monitoring personnel will notify the staff to rush to the site to cut off the power for processing, which takes a long time on the way; it is easy to pose a threat to personal and equipment safety.

[0003] The operating mechanism is an important component of the high-voltage circuit breaker, which consists of an energy storage unit, a control unit and a force transmission unit. The spring-type operating mechanism is mainly composed of an energy storage mechanism, an electromagnetic system and a mechanical system. In the spring operating mechanism, the motor stores mechanical energy in the closing spring through the action of the deceleration device and the energy storage mechanism. After the storage is completed, the spring is kept in the energy storage state through the lock, and the power supply of the motor is cut off. When the closing action is completed, the motor is immediately connected to the power supply, and the closing spring is re-energyed through the energy storage mechanism to prepare for the next closing action. However, in the related art, whether the energy storage motor, that is, the motor is idling is detected by detecting the running time of the energy storage motor when the energy storage motor is powered on, but it does not take into account that when the running time of the energy storage motor does not exceed the preset time, it may also be in an abnormal operating state.

[0004] The Chinese patent "Energy storage delay protector for spring operating mechanism of circuit breaker", publication number: CN 208142087 U, publication date: April 24, 2018, specifically discloses a circuit board, a mounting bar, a terminal block, an intermediate relay, a time relay, an energy storage switch and an energy storage indicator light. The circuit board is installed in the instrument room or the circuit breaker mechanism box. The circuit board has a built-in motor control circuit. The surface of the circuit board is equipped with an intermediate relay and a time relay; after the time relay is connected in parallel with the energy storage motor, the energy storage switch is connected in series. The normally closed contact of the intermediate relay of the intermediate relay is connected in series with the energy storage motor. The time relay delay closing contact of the time relay controls the connection of the intermediate relay. The time relay and the intermediate relay cooperate with the control circuit to form a delay protection mechanism for the energy storage motor. After the energy storage motor runs for more than the specified time, if the motor does not stop working, the time relay triggers the intermediate relay, and the motor power is cut off through the intermediate relay. This technical solution only considers the idling phenomenon of the energy storage motor when it runs for a long time, and cannot detect whether the energy storage motor runs abnormally when it is in the specified time.

[0005] The Chinese patent "Energy Storage Motor Protection Device", publication number: CN 205646775 U, publication date: March 30, 2016, specifically discloses a power supply device, a current sampling and judgment device, a timing output device, a self-recovering overcurrent protection device, a fault output indication device, etc. The motor protection device is connected in series with the motor through a boat-type switch, a self-recovering overcurrent protection device, a sampling resistor of the current sampling and judgment device, a relay normally closed contact, a rectifier bridge, a field effect transistor, etc. to form a power supply circuit to protect the motor. In this scheme, the current of the energy storage motor is collected and it is judged whether the energy storage motor is in an abnormal operating state based on the current. It is impossible to judge whether the energy storage operation is abnormal when the current of the energy storage motor is normal, that is, it is impossible to make a timely judgment when the power supply is abnormal. Summary of the invention

[0006] The present application aims to solve the problem in the prior art that abnormal operation of energy storage motors easily causes equipment failure and creates safety hazards, and provides a spring operating mechanism circuit breaker energy storage abnormal protection method. The method determines the state that the current energy storage motor should be in based on the spring action signal, and then determines whether the currently collected data conforms to the state that the current energy storage motor should be in based on the state that the current energy storage motor should be in. If not, the power supply of the energy storage motor is directly cut off. When the spring action signal is received, the temperature sensor and the time relay detect the actual state and compare it with the set threshold value respectively, so as to verify each other and avoid the problem of single detection failure. At the same time, the two are staggered to reduce the power loss caused by the detection element, improve the detection accuracy and reduce the detection energy consumption.

[0007] In order to achieve the above technical objectives, a technical solution provided by the present application is a spring-operated mechanism circuit breaker energy storage abnormality protection method, comprising the following steps: collecting a spring action signal, and controlling the temperature sensor and the time relay to act according to the spring action signal; the temperature sensor action execution includes: the temperature sensor collects the temperature of the energy storage motor, and determines whether the temperature of the energy storage motor is higher than a preset temperature threshold. If so, the energy storage motor power supply is disconnected, and if not, continuous detection is performed; the time relay action execution includes: the time relay timing, and delay control is performed with a preset time threshold. When the duration of the spring action signal reaches the preset time threshold, the energy storage motor power supply is disconnected.

[0008] Furthermore, the spring action signal at least includes: a spring movement signal and a spring static signal.

[0009] Furthermore, controlling the temperature sensor and the time relay action according to the spring action signal includes: controlling the temperature sensor action according to the spring movement signal, and controlling the time relay action according to the spring static signal; or, controlling the temperature sensor action according to the spring static signal, and controlling the time relay action according to the spring movement signal.

[0010] Furthermore, the temperature sensor action execution also includes: the temperature sensor collects the temperature of the energy storage motor during the duration of the spring movement signal, and determines whether the temperature of the energy storage motor is higher than the preset temperature threshold. If so, the power supply of the energy storage motor is disconnected, and if not, the detection is continued; or, the temperature sensor collects the temperature of the energy storage motor during the duration of the spring static signal, and determines whether the temperature of the energy storage motor is higher than the preset temperature threshold. If so, the power supply of the energy storage motor is disconnected, and if not, the detection is continued.

[0011] Furthermore, the execution of the time relay action also includes: time relay timing, delay control based on a preset time threshold, and when the duration of the spring static signal reaches the preset time threshold, the power supply of the energy storage motor is disconnected; or, time relay timing, delay control based on a preset time threshold, and when the duration of the spring moving signal reaches the preset time threshold, the power supply of the energy storage motor is disconnected.

[0012] Furthermore, the temperature sensor action execution also includes: the temperature sensor collects the temperature of the energy storage motor during the duration of the spring static signal, and determines whether the temperature of the energy storage motor rises. If so, disconnect the power supply of the energy storage motor; if not, continue to detect.

[0013] Another technical solution provided by the present application is a spring-operated mechanism circuit breaker energy storage abnormality protection system, which is connected to an energy storage motor and is used to implement any of the spring-operated mechanism circuit breaker energy storage abnormality protection methods described above, and at least includes: a trigger module, which is used to output a spring action signal according to the spring action state to trigger a temperature judgment module or / and a time judgment module; a temperature judgment module, which is used to collect the temperature of the energy storage motor and perform temperature judgment, and output a control signal to a power control module; a time judgment module, which is used to time the running time of the energy storage motor and perform time judgment, and output a control signal to the power control module; and a power control module, which is used to receive control signals from the temperature judgment module and the time judgment module and control the on and off of the power supply of the energy storage motor.

[0014] Furthermore, the trigger module at least includes a single-pole double-throw switch JC1 arranged on the spring side of the spring operating mechanism.

[0015] Furthermore, the power control module also includes an intermediate relay KM, a normally closed first intermediate relay switch KM1, and a normally open second intermediate relay switch KM2.

[0016] Furthermore, the time judgment module at least includes a super capacitor C1 and a time relay KT.

[0017] The beneficial effects of the present application are as follows: the normal operating state of the energy storage motor is judged by the movement of the spring, and then the temperature sensor and the time relay are started to judge the motor temperature and the motor operation time according to the movement and static state of the spring respectively, and the normal operating state of the energy storage motor under the movement and static state of the spring is compared with the actual operating state, so as to compensate for the error of the preset operation time of the motor. At the same time, the temperature sensor and the time relay are staggered for detection and mutual verification, so as to avoid the problem of failure to cut off the power supply in time due to failure of a single detection. And when an abnormality occurs on the spring side, such as when the spring is stuck, the power supply can be directly cut off through the inconsistency between the spring state and the operation state of the energy storage motor, so as to ensure the normal operation of the entire spring operating mechanism and the timely power off in case of abnormal operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a flow chart of an embodiment of the spring operating mechanism circuit breaker energy storage abnormality protection method of the present application.

[0019] Figure 2 This is a circuit diagram of an embodiment of the spring-operated mechanism circuit breaker energy storage abnormality protection system of the present application.

[0020] Figure 3 A circuit in another embodiment of the spring operating mechanism circuit breaker energy storage abnormal protection system of the present application Figure 1 .

[0021] Figure 4 A circuit in another embodiment of the spring operating mechanism circuit breaker energy storage abnormal protection system of the present application Figure 2 .

[0022] Figure 5 A circuit in another embodiment of the spring operating mechanism circuit breaker energy storage abnormality protection system of the present application Figure 1 .

[0023] Figure 6 A circuit in another embodiment of the spring operating mechanism circuit breaker energy storage abnormality protection system of the present application Figure 2 .

[0024] Figure 7 A circuit in another embodiment of the spring operating mechanism circuit breaker energy storage abnormality protection system of the present application Figure 3 . DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solutions and advantages of the present application more clear, the present application is further described in detail below in conjunction with the drawings and examples. It should be understood that the specific implementation method described here is only an optimal embodiment of the present application, which is only used to explain the present application and does not limit the scope of protection of the present application. All other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present application.

[0026] like Figure 1 As shown, as the first embodiment of the present application, the spring operating mechanism circuit breaker energy storage abnormality protection method includes the following steps: Collect spring action signals, and control the temperature sensor and time relay actions according to the spring action signals; The temperature sensor action execution includes: the temperature sensor collects the temperature of the energy storage motor, determines whether the temperature of the energy storage motor is higher than a preset temperature threshold, if so, disconnects the power supply of the energy storage motor, if not, continues to detect; The execution of the time relay action includes: time relay timing, delay control based on a preset time threshold, and when the duration of the spring action signal reaches the preset time threshold, the power supply of the energy storage motor is disconnected.

[0027] In this embodiment, by collecting the spring action signal, it is determined whether the spring operating mechanism is in action, so that according to the action situation, the temperature sensor is controlled to collect the temperature of the energy storage motor and the time relay is controlled to perform timing. When the temperature of the energy storage motor is higher than the preset temperature threshold during the movement of the spring, it is considered that the operating temperature of the energy storage motor is too high, and a temperature failure is very likely to occur. At this time, the power supply of the energy storage motor is immediately disconnected to avoid the energy storage motor temperature being too high and causing a fire in the switch cabinet. At the same time, the time relay is used to determine whether the duration of the spring action signal exceeds the preset time threshold. If so, it is considered that the operation time of the energy storage motor is abnormal. At this time, the energy storage motor is disconnected to avoid abnormal operation of the energy storage motor. It can be understood that after the power supply of the energy storage motor is disconnected, the fault information can be transmitted to the control end through a signal or an alarm can be issued, thereby reminding the staff to deal with it in time.

[0028] As a second embodiment of the present application, the spring action signal at least includes: a spring movement signal and a spring static signal. The spring operating mechanism circuit breaker energy storage abnormality protection method includes the following steps: Collect spring movement signals and spring static signals, control the action of the temperature sensor according to the spring movement signals, and control the action of the time relay according to the spring static signals; The temperature sensor action execution includes: the temperature sensor collects the energy storage motor temperature during the duration of the spring movement signal, determines whether the energy storage motor temperature is higher than a preset temperature threshold, if so, disconnects the energy storage motor power supply, if not, continues to detect; The execution of the time relay action includes: time relay timing, delay control based on a preset time threshold, and when the duration of the spring static signal reaches the preset time threshold, the power supply of the energy storage motor is disconnected.

[0029] The spring movement signal and spring static signal are collected through the micro switch. When the spring movement signal is collected, the time relay does not work, and the temperature sensor works. There are two situations when the spring moves. One is that the energy storage motor works to compress the spring to store energy, and the other is that the spring is released to close the switch. When the spring is released to close the switch, the energy storage motor is not powered on. At this time, the temperature sensor cannot be powered on and does not monitor the temperature of the energy storage motor. When the energy storage motor is working, the temperature sensor receives the spring movement signal to monitor the working temperature of the energy storage motor, thereby ensuring that the energy storage motor is in a normal working state during the process of compressing the spring to store energy, avoiding the energy storage action under abnormal temperature conditions, causing safety problems. When the spring static signal is collected, the time relay starts timing. When the preset time threshold is reached, the power supply of the energy storage motor is disconnected to prevent the motor from idling. In this embodiment, the temperature sensor and the time relay are controlled by the spring movement signal and the spring static signal respectively. The temperature sensor and the time relay are operated alternately to reduce the power loss of the monitoring device. At the same time, the spring static is used as the timing point of the time relay to avoid the untimely switching caused by the inaccurate estimation of the energy storage time of the energy storage motor, improve the accuracy of the judgment of the idling time of the energy storage motor, and improve the reliability of the line. When the spring static state is identified, the time relay immediately enters the delayed power-off. Since the time relay starts the timing when the spring is static, the preset time threshold is short at this time, that is, when the time relay is started, it has been judged that the energy storage motor should stop running at this time. The time relay cuts off the power after a short delay to ensure that the power can be cut off when the energy storage motor fails or the spring side fails, further ensuring the safety of the mechanism.

[0030] As a third embodiment of the present application, the time relay action execution also includes: The time relay starts timing and uses the preset time threshold for delay control. When the duration of the spring static signal reaches the preset time threshold, the intermediate relay is started and the intermediate relay disconnects the power supply of the energy storage motor.

[0031] By controlling the opening and closing of the energy storage motor power supply through an intermediate relay, the control logic of the time relay can be flexibly adjusted according to actual conditions, thereby improving the selectivity of the time relay and the reliability of the circuit.

[0032] As a fourth embodiment of the present application, a spring operating mechanism circuit breaker energy storage abnormality protection method comprises the following steps: Collect spring movement signals and spring static signals, control the action of the temperature sensor according to the spring static signal, and control the action of the time relay according to the spring movement signal; The temperature sensor action execution includes: the temperature sensor collects the temperature of the energy storage motor during the duration of the spring static signal, and determines whether the temperature of the energy storage motor is higher than the preset temperature threshold. If so, the power supply of the energy storage motor is disconnected, and if not, the detection is continued; The execution of the time relay action includes: time relay timing, delay control based on a preset time threshold, and when the duration of the spring movement signal reaches the preset time threshold, the power supply of the energy storage motor is disconnected.

[0033] In this embodiment, the preset time threshold is the energy storage time of the energy storage motor. In other embodiments, the preset time threshold is the sum of the energy storage time of the energy storage motor and the reserve margin. When the spring starts to move, the time relay starts timing, and determines whether the energy storage is completed according to the normal energy storage time of the energy storage motor, that is, the power supply of the energy storage motor is disconnected according to the preset time threshold, and the rotation of the energy storage motor is stopped. At the same time, the spring static signal is collected. When the spring is static, the temperature sensor is triggered to collect the temperature. At this time, if the temperature of the energy storage motor is higher than the preset temperature threshold, it is considered that the energy storage motor is operating abnormally, and the power is immediately cut off. In this embodiment, the temperature sensor is used to supplement the error of the reserve margin, so that even if the reserve margin is too much, the temperature monitoring of the temperature sensor can be used to prevent the energy storage motor from idling for too long.

[0034] As another implementation of this embodiment, the temperature sensor action execution further includes: The temperature sensor collects the temperature of the energy storage motor during the duration of the spring static signal to determine whether the temperature of the energy storage motor rises. If so, the power supply of the energy storage motor is disconnected. If not, continuous detection is performed.

[0035] When the spring is in a static state, the energy storage motor should stop running, that is, the temperature should no longer rise. If the temperature of the energy storage motor still rises when the spring is in a static state, whether the energy storage motor is operating abnormally or there is a spring side fault, that is, the spring is stuck or other faults that cause the spring to be static, the energy storage motor should stop rotating. Therefore, when the temperature of the energy storage motor still rises when the spring is in a static state, it is considered that the energy storage motor is in an abnormal operating state, and the power supply of the energy storage motor is immediately disconnected. In some cases, the temperature sensor simultaneously determines whether the temperature of the energy storage motor exceeds a preset temperature threshold and whether the temperature of the energy storage motor rises. When the spring has not yet been compressed, it is also in a static state, that is, when the power is on, the temperature sensor can detect the initial temperature of the energy storage motor. At this time, whether the initial temperature exceeds the preset temperature threshold is used to determine whether the energy storage motor is in an abnormal starting state. If so, the power is immediately cut off to prevent the energy storage motor from starting and running in an abnormal state.

[0036] In this embodiment, the time relay action execution also includes: The time relay counts and uses a preset time threshold for delay control. When the duration of the spring movement signal reaches the preset time threshold, the intermediate relay is started and the intermediate relay disconnects the power supply of the energy storage motor.

[0037] It is understandable that the above method embodiment also includes: after disconnecting the motor power supply, an abnormal alarm is issued. The abnormal alarm at least includes an alarm of over-limit operation time and an alarm of over-limit operation temperature, so as to provide the operator with accurate abnormal information for investigation.

[0038] As a fifth embodiment of the present application, a spring-operated mechanism circuit breaker energy storage abnormality protection system is connected to an energy storage motor and at least includes: A trigger module, used for outputting a spring action signal according to the spring action state to trigger the temperature judgment module and / or the time judgment module; A temperature judgment module is used to collect the temperature of the energy storage motor and perform temperature judgment, and output a control signal to the power control module; A time judgment module, used to time the running time of the energy storage motor and perform time judgment, and output a control signal to the power control module; The power control module is used to receive control signals from the temperature judgment module and the time judgment module and control the on and off of the power supply of the energy storage motor.

[0039] In this embodiment, the trigger module is connected to the temperature judgment module and the time judgment module. The temperature judgment module, the time judgment module and the power control module are all connected to the energy storage motor. By collecting the temperature and operating time of the energy storage motor, it is determined whether the energy storage motor is in an abnormal operating state, and a control signal is output to the power control module to control the energy storage motor to disconnect the power supply when it is in an abnormal operating state, thereby ensuring safe and reliable circuit operation.

[0040] like Figure 2 As shown, the trigger module at least includes a spring reset switch JC1 arranged on the spring side of the spring operating mechanism, such as being arranged on the closing spring chassis in the BLK type spring operating mechanism. When the closing spring rotates with the motor, the spring reset switch JC1 is abutted by the closing spring, thereby outputting the action signal of the closing spring, that is, when the spring reset switch JC1 is abutted, the spring is in a moving state. Since the compression energy storage time of the spring is usually 10s, it can be approximately considered that when the spring is in a moving state, the spring reset switch JC1 is always in an abutted state. When the spring is stationary, there is no spring abutting the spring reset switch JC1. At this time, the spring reset switch resets JC1 and outputs a spring stationary signal. In the setting, the spring reset switch JC1 can be set to the side away from the motor shaft, so that the spring can no longer abut the spring reset switch JC1 when the spring is compressed. At the same time, in order to avoid the spring reset switch JC1 affecting the spring compression, a micro switch can be used.

[0041] The time judgment module at least includes a time relay KT, the temperature judgment module at least includes a temperature sensor RT, and the power control module at least includes a temperature control switch KR1 and a time control switch KT1. The temperature control switch KR1 and the time control switch KT1 are normally closed. When the time relay KT sends a control signal, the time control switch KT1 opens and the energy storage motor is powered off. When the temperature sensor RT sends a control signal, the temperature control switch KR1 opens and the energy storage motor is powered off, thereby realizing the judgment of the abnormal state of the energy storage motor and executing control.

[0042] In this embodiment, the temperature judgment module also includes a micro MCU, which is used to judge the collected temperature and the preset temperature threshold, and to output the control signal or the abnormal state. The micro MCU can be connected to the user end to prompt the staff that the temperature of the energy storage motor is abnormal. Similarly, the time relay also includes a micro MCU, which is used to connect to the user end to prompt the staff that the operation time of the energy storage motor is abnormal.

[0043] like Figure 3 As shown, as the sixth embodiment of the present application, the trigger module at least includes a single-pole double-throw switch JC1 arranged on the spring side of the spring operating mechanism. At this time, when the spring is stationary, the single-pole double-throw switch JC1 is connected to the time relay KT, and the time relay KT performs timing. When the spring moves, the single-pole double-throw switch JC1 is connected to the temperature sensor RT, and the temperature sensor RT performs temperature acquisition, thereby achieving staggered operation of the temperature sensor RT and the time relay KT to reduce energy loss, and at the same time bidirectionally verifying whether the operating status of the energy storage motor is abnormal.

[0044] like Figure 4 As shown, the power control module also includes an intermediate relay KM, a normally closed first intermediate relay switch KM1, and a normally open second intermediate relay switch KM2. When the spring is stationary, the single-pole double-throw switch JC1 is connected to the time relay KT, and the time relay KT counts, and the intermediate relay is started after reaching the preset time threshold. The intermediate relay controls the first intermediate relay switch KM1 to open and the second intermediate relay switch KM2 to close, thereby controlling the energy storage motor to be powered off.

[0045] like Figure 5As shown, as the seventh embodiment of the present application, the trigger module at least includes a single-pole double-throw switch JC1 arranged on the spring side of the spring operating mechanism, and the time judgment module also includes a super capacitor C1, and the super capacitor C1 is connected in parallel with the time relay KT. At this time, when the spring is stationary, the single-pole double-throw switch JC1 is connected to the temperature sensor RT, and the temperature sensor RT performs temperature acquisition. When the spring moves, the single-pole double-throw switch JC1 is connected to the time relay KT, and the time relay KT performs timing, and the super capacitor C1 is charged. When the spring is stationary, the super capacitor is reversely charged to the time relay KT to maintain the timing of the time relay, so that when there is a reserve margin, the time relay can continue to time within the reserve margin time.

[0046] like Figure 6 As shown, in this embodiment, the spring operating mechanism circuit breaker energy storage abnormal protection system can be integrated in the secondary compartment to avoid the circuit breaker's internal structure being relatively compact and the space being too small to be reasonably laid out. The intermediate relay is Schneider RXM4AB2P7 14-pin AC220V, the time relay is Chint JSZ3A, and the preset time threshold is 30s.

[0047] like Figure 7 As shown, the power control module also includes a normally closed third intermediate relay switch KM3, a normally open fourth intermediate relay switch KM4 and an alarm device. The alarm device at least includes a start indicator light L1, which is used to light up and alarm when a fault occurs. Among them, when the spring is stationary, the single-pole double-throw switch JC1 is connected to the time relay KT, and the time relay KT performs timing. After reaching the preset time threshold, the intermediate relay is started, and the intermediate relay controls the first intermediate relay switch KM1 to open, the second intermediate relay switch KM2 to close, the third intermediate relay switch KM3 to open, and the fourth intermediate relay switch KM4 to close. The alarm device is powered on to give an alarm prompt. In other embodiments, the alarm device also includes an alarm microcontroller, which communicates with the user end, receives data information from the time relay and the temperature sensor, and gives an alarm prompt. It can be understood that although the protection circuit and the filter circuit are not mentioned in this application, in order to improve the circuit safety and reliability in this system, protection components can be appropriately added to achieve the protection of the circuit.

[0048] The above specific implementation is a preferred implementation of the spring-operated mechanism circuit breaker energy storage abnormal protection method and system of the present application, and is not intended to limit the specific implementation scope of the present application. The scope of the present application includes but is not limited to the present specific implementation. All equivalent changes made in accordance with the shape and structure of the present application are within the protection scope of the present application.

Claims

1. A method for protecting a circuit breaker from abnormal energy storage caused by a spring operating mechanism, characterized in that: The steps include: Collect spring action signals, and control the temperature sensor and time relay actions according to the spring action signals; The temperature sensor action execution includes: the temperature sensor collects the temperature of the energy storage motor, determines whether the temperature of the energy storage motor is higher than a preset temperature threshold, if so, disconnects the power supply of the energy storage motor, if not, continues to detect; The execution of the time relay action includes: time relay timing, delay control based on a preset time threshold, and when the duration of the spring action signal reaches the preset time threshold, the power supply of the energy storage motor is disconnected.

2. The spring operating mechanism circuit breaker energy storage abnormality protection method according to claim 1, characterized in that: The spring action signal at least includes: a spring movement signal and a spring static signal.

3. The spring operating mechanism circuit breaker energy storage abnormality protection method according to claim 2, characterized in that: The controlling of the temperature sensor and the time relay action according to the spring action signal comprises: Control the temperature sensor according to the spring movement signal, and control the time relay according to the spring static signal; or The temperature sensor is controlled according to the spring static signal, and the time relay is controlled according to the spring movement signal.

4. The spring operating mechanism circuit breaker energy storage abnormality protection method according to claim 3, characterized in that: The temperature sensor operation includes the following steps: The temperature sensor collects the temperature of the energy storage motor during the duration of the spring movement signal, and determines whether the temperature of the energy storage motor is higher than the preset temperature threshold. If so, the power supply of the energy storage motor is disconnected; if not, continuous detection is performed; or, The temperature sensor collects the temperature of the energy storage motor during the duration of the spring static signal, and determines whether the temperature of the energy storage motor is higher than the preset temperature threshold. If so, the power supply of the energy storage motor is disconnected, if not, continuous detection is performed.

5. The spring operating mechanism circuit breaker energy storage abnormality protection method according to claim 3, characterized in that: The time relay action execution also includes: The time relay is used for timing, and the delay control is performed based on the preset time threshold. When the duration of the spring static signal reaches the preset time threshold, the power supply of the energy storage motor is disconnected; or, The time relay is used for timing, and the delay control is performed based on the preset time threshold. When the duration of the spring movement signal reaches the preset time threshold, the power supply of the energy storage motor is disconnected.

6. The spring operating mechanism circuit breaker energy storage abnormality protection method according to claim 4, characterized in that: The temperature sensor action execution also includes: The temperature sensor collects the temperature of the energy storage motor during the duration of the spring static signal to determine whether the temperature of the energy storage motor rises. If so, the power supply of the energy storage motor is disconnected. If not, continuous detection is performed.

7. A spring-operated mechanism circuit breaker energy storage abnormality protection system, connected to an energy storage motor, for implementing any one of the spring-operated mechanism circuit breaker energy storage abnormality protection methods according to claim 1 to claim 6, characterized in that: include: A trigger module, used for outputting a spring action signal according to the spring action state to trigger the temperature judgment module and / or the time judgment module; The temperature judgment module is used to collect the temperature of the energy storage motor and perform temperature judgment, and output a control signal to the power control module; the time judgment module is used to time the operation time of the energy storage motor and perform time judgment, and output a control signal to the power control module; The power control module is used to receive control signals from the temperature judgment module and the time judgment module and control the on and off of the power supply of the energy storage motor.

8. The spring-operated mechanism circuit breaker energy storage abnormality protection system according to claim 7, characterized in that: The trigger module at least includes a single-pole double-throw switch JC1 arranged on the spring side of the spring operating mechanism.

9. The spring-operated mechanism circuit breaker energy storage abnormality protection system according to claim 8, characterized in that: The power control module also includes an intermediate relay KM, a normally closed first intermediate relay switch KM1, and a normally open second intermediate relay switch KM2.

10. The spring-operated mechanism circuit breaker energy storage abnormality protection system according to claim 9, characterized in that: The time judgment module at least includes a super capacitor C1 and a time relay KT.

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