Voltage protection device and generator system

Abstract

The utility model provides a voltage protection device and a generator system. The voltage protection device comprises a sampling circuit, a control circuit and a driving switch circuit, the first end of the sampling circuit is electrically connected with the generator, the second end of the sampling circuit is electrically connected with the first end of the control circuit, the second end of the control circuit is electrically connected with the first end of the driving switch circuit, and the second end of the driving switch circuit is electrically connected with the generator. The third end of the driving switch circuit is electrically connected with the second end of the energy storage motor, the sampling circuit collects and processes the power supply voltage of the generator in real time to obtain a first voltage signal, and the control circuit outputs a first control signal or a second control signal to the driving switch circuit according to the first voltage signal. And the driving switch circuit controls the energy storage motor to be in a working state according to the first control signal or controls the energy storage motor to be in a power-off state according to the second control signal, so that circuit protection can be realized and personal and property safety can be guaranteed when the generator is under-voltage or over-voltage.

Description

Technical Field

[0001] The present application relates to the field of electric power technology, and in particular to a voltage protection device and a generator system. Background Art

[0002] Oil and gas field gas-fired power generation is a highly efficient way to utilize energy. Power conversion or transmission is achieved through generators and frame-mounted circuit breakers. Frame-mounted circuit breakers control the on / off state of circuits and quickly disconnect circuits in the event of abnormal conditions such as short circuits and overloads, ensuring safe and stable system operation.

[0003] Currently, in the related art, the generator is electrically connected to the frame-type circuit breaker. After the generator is started, the generator drives the energy storage motor in the frame-type circuit breaker, and the energy storage motor stores energy for the energy storage mechanism in the frame-type circuit breaker.

[0004] However, during the initial startup phase of a generator, the generator's supply voltage gradually increases from 0, requiring 5 to 10 minutes to stabilize. This initial low and unstable supply voltage can cause the energy storage motor to stall, potentially damaging the frame-mounted circuit breaker and potentially causing a fire, resulting in personal injury and property damage. Utility Model Content

[0005] The present application provides a voltage protection device and a generator system to solve the problem that the initial low and unstable power supply voltage of the generator may cause the energy storage motor to stall, thereby causing damage to the energy storage motor and possibly causing a fire, resulting in personal and property losses. The circuit breaker is protected and the safety of people and property is guaranteed.

[0006] In a first aspect, the present application provides a voltage protection device for use in a generator system, the generator system further comprising a generator and a circuit breaker, wherein a first end of an energy storage motor in the circuit breaker is electrically connected to the generator, and the voltage protection device comprises: a sampling circuit, a control circuit, and a drive switch circuit;

[0007] A first end of the sampling circuit is electrically connected to the generator, a second end of the sampling circuit is electrically connected to a first end of the control circuit, a second end of the control circuit is electrically connected to a first end of the drive switch circuit, a second end of the drive switch circuit is electrically connected to the generator, and a third end of the drive switch circuit is electrically connected to a second end of the energy storage motor;

[0008] The sampling circuit is used to collect and process the power supply voltage of the generator in real time, obtain a first voltage signal, and output the first voltage signal to the control circuit; the control circuit is used to receive the first voltage signal and output a first control signal to the drive switch circuit when the first voltage signal is outside a preset voltage range, or output a second control signal to the drive switch circuit when the first voltage signal is within the preset voltage range; the drive switch circuit is used to receive the first control signal or the second control signal and control the energy storage motor to be in an operating state according to the first control signal, or control the energy storage motor to be in a power-off state according to the second control signal.

[0009] The voltage protection device provided in the present application includes: a sampling circuit, a control circuit and a drive switch circuit, wherein the first end of the sampling circuit is electrically connected to the generator, the second end of the sampling circuit is electrically connected to the first end of the control circuit, the second end of the control circuit is electrically connected to the first end of the drive switch circuit, the second end of the drive switch circuit is electrically connected to the generator, and the third end of the drive switch circuit is electrically connected to the second end of the energy storage motor, so that the sampling circuit can collect and process the power supply voltage of the generator in real time, obtain a first voltage signal, and output the first voltage signal to the control circuit. The control circuit receives the first voltage signal and outputs a first control signal to the drive switch circuit when the first voltage signal is outside a preset voltage range, or outputs a second control signal to the drive switch circuit when the first voltage signal is within the preset voltage range. The drive switch The circuit receives a first control signal or a second control signal and controls the energy storage motor to be in an operating state according to the first control signal, or controls the energy storage motor to be in a power-off state according to the second control signal. Thus, even when the power supply voltage is low, that is, when the generator is undervoltage, or when the generator is overvoltage, the connection between the generator and the energy storage motor can be promptly disconnected to protect the energy storage motor and the circuit breaker. Alternatively, when the power supply voltage of the generator is normal, the connection between the generator and the energy storage motor is maintained so that the generator can normally store energy for the energy storage motor, thereby avoiding the problem that the energy storage motor may be blocked due to the initial low and unstable power supply voltage of the generator or the power supply voltage of the generator being too high, thereby causing damage to the circuit breaker. This avoids fire and personal and property losses, protects the circuit breaker, and ensures the safety of people and property.

[0010] In one possible design, the driving switch circuit includes: a driving circuit and a switching circuit, the switching circuit including a common contact, a normally closed contact, a normally open contact, and a coil;

[0011] The first end of the drive circuit is electrically connected to the second end of the control circuit, the second end of the drive circuit is electrically connected to the coil, the common contact is electrically connected to the generator, the normally closed contact is open, and the normally open contact is electrically connected to the second end of the energy storage motor;

[0012] The drive circuit is used to control the connection between the common contact and the normally open contact according to the first control signal so that the energy storage motor operates through the loop formed by the common contact, the normally open contact, the generator and the energy storage motor, or the drive circuit is used to control the connection between the common contact and the normally closed contact according to the second control signal so that the energy storage motor is disconnected from the generator.

[0013] In one possible design, the sampling circuit includes a step-down circuit and a filtering circuit, the step-down circuit includes: a first transistor, a first resistor, and a second resistor, and the filtering circuit includes: a third resistor, a first capacitor, and a second capacitor;

[0014] a first terminal of the first transistor electrically connected to the generator, a second terminal of the first transistor electrically connected to the first terminal of the first resistor, a second terminal of the first resistor electrically connected to the first terminal of the second resistor, a second terminal of the second resistor electrically connected to the first terminal of the third resistor, a second terminal of the third resistor electrically connected to ground, a first terminal of the first capacitor electrically connected to the second terminal of the second resistor, a second terminal of the first capacitor electrically connected to ground, a first terminal of the second capacitor electrically connected to the second terminal of the second resistor, a second terminal of the second capacitor grounded, and a first terminal of the second capacitor electrically connected to the first terminal of the control circuit;

[0015] The step-down circuit is used to reduce the power supply voltage of the generator to obtain a second voltage signal. The filter circuit is used to filter the second voltage signal to obtain a first voltage signal, and input the first voltage signal to the control circuit.

[0016] In one possible design, the voltage protection device further includes: a power supply circuit;

[0017] The first end of the power supply circuit is electrically connected to the generator, the second end of the power supply circuit is electrically connected to the third end of the control circuit, and the third end of the power supply circuit is electrically connected to the fourth end of the drive switch circuit;

[0018] The power supply circuit is used to provide electrical energy to the control circuit and the drive switch circuit.

[0019] In one possible design, the power supply circuit includes: a first step-down circuit, a second step-down circuit, and a rectifier circuit;

[0020] A first end of the first step-down circuit is electrically connected to the generator, a second end of the first step-down circuit is electrically connected to a first end of the rectifier circuit, a second end of the rectifier circuit is electrically connected to a first end of the second step-down circuit, a third end of the rectifier circuit is electrically connected to a fourth end of the drive switch circuit, and a second end of the second step-down circuit is electrically connected to a third end of the control circuit.

[0021] In one possible design, the power supply circuit also includes an alarm circuit and an indication circuit;

[0022] a first end of the alarm circuit electrically connected to the second end of the second step-down circuit, a second end of the alarm circuit electrically connected to the fourth end of the control circuit, a first end of the indicator circuit electrically connected to the second end of the second step-down circuit, and a second end of the indicator circuit electrically connected to the fifth end of the control circuit;

[0023] The alarm circuit is used to alarm when the energy storage motor is disconnected from the generator, and the indication circuit is used to indicate that the energy storage motor is in a working state.

[0024] In a possible design, the driving circuit includes a driving chip, and the model of the driving chip is ULN2003A.

[0025] In a possible design, the switching circuit includes a relay, and the relay model is JQC3FF / 012-1Z.

[0026] In a second aspect, the present application provides a generator system, which includes: a generator, a circuit breaker, and a voltage protection device as in the first aspect and any possible design of the first aspect, wherein the circuit breaker includes an energy storage motor.

[0027] In one possible design, the circuit breaker is a frame-type circuit breaker.

[0028] The beneficial effects of the system provided in the above-mentioned second aspect and each possible design of the above-mentioned second aspect can be referred to the beneficial effects brought about by the above-mentioned first aspect and each possible implementation method of the first aspect, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 A schematic structural diagram of a generator system provided in one embodiment of the present application.

[0030] Figure 2 A schematic structural diagram of a voltage protection device provided in one embodiment of the present application.

[0031] Figure 3 A schematic structural diagram of a voltage protection device provided in one embodiment of the present application.

[0032] Figure 4 A schematic diagram of the structure of a sampling circuit provided in one embodiment of the present application.

[0033] Figure 5 A schematic structural diagram of a voltage protection device provided in one embodiment of the present application.

[0034] Figure 6 A schematic diagram of the structure of a power supply circuit provided in one embodiment of the present application.

[0035] Figure 7 A schematic structural diagram of a power supply circuit provided in one embodiment of the present application.

[0036] Description of reference numerals:

[0037] 1 - generator; 2 - voltage protection device; 3 - circuit breaker; 30 - energy storage motor; 20 - sampling circuit; 21 - control circuit; 22 - drive switch circuit; 23 - power supply circuit; 220 - drive circuit; 221 - switch circuit; COM - common contact; P - normally closed contact; Q - normally open contact; 200 - step-down circuit; 201 - filter circuit; 230 - first step-down circuit, 231 - second step-down circuit; 232 - rectifier circuit; Q1 - first transistor; Q2 - second transistor; Q3 ——third transistor; Q4——fourth transistor; Q5——fifth transistor; Q6——sixth transistor; Q7——seventh transistor; R1——first resistor; R2——second resistor; R3——third resistor; R4——fourth resistor; R5——fifth resistor; R6——sixth resistor; R7——seventh resistor; R8——eighth resistor; C1——first capacitor; C2——second capacitor; C3——third capacitor; C4——fourth capacitor; C5——fifth capacitor; C6——sixth capacitor; C7——seventh capacitor; U1——integrated voltage regulator. DETAILED DESCRIPTION

[0038] In this application, "at least one" refers to one or more, and "plurality" refers to two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: the existence of A alone, the existence of A and B at the same time, and the existence of B alone, where A and B can be singular or plural. The character " / " generally indicates that the objects associated before and after are in an "or" relationship. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single or plural items. For example, at least one of a alone, b alone, or c alone can represent: a alone, b alone, c alone, a and b in combination, a and c in combination, b and c in combination, or a, b, and c in combination, where a, b, and c can be single or multiple. In addition, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance.

[0039] The directions or positional relationships indicated by terms such as "center", "longitudinal", "lateral", "up", "down", "left", "right", "front", and "back" are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present application and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limiting the present application.

[0040] The terms "connected" and "connect" should be interpreted broadly. For example, "connected" or "connected" in a circuit structure can refer not only to a physical connection, but also to an electrical connection or a signal connection. For example, it can be a direct connection, i.e., a physical connection, or an indirect connection through at least one intermediate component, as long as the circuit is interconnected. It can also refer to internal connectivity between two components. Signal connection can refer not only to signal connection through circuits but also to signal connection through media, such as radio waves. Those skilled in the art will understand the specific meanings of the above terms in this application on a case-by-case basis.

[0041] Illustratively, an embodiment of the present application provides a generator system.

[0042] See also Figure 1 , Figure 1 This is a schematic diagram of the structure of a generator system provided in one embodiment of the present application. Figure 1 As shown, the generator system may include: a generator 1 , a voltage protection device 2 and a circuit breaker 3 .

[0043] The circuit breaker 3 includes an energy storage motor 30 , which is used to store energy for the energy storage mechanism of the circuit breaker 3 .

[0044] The generator 1 is electrically connected to the voltage protection device 2 , the voltage protection device 2 is electrically connected to the second end of the energy storage motor 30 , and the first end of the energy storage motor 30 is electrically connected to the generator 1 .

[0045] The generator 1 is electrically connected to the voltage protection device 2 , which means that the live wire of the generator 1 is electrically connected to the voltage protection device 2 .

[0046] exist Figure 1 In FIG, the first end of the energy storage motor 30 is marked as 1, and the second end of the energy storage motor 30 is marked as 2.

[0047] The generator 1 is used to convert mechanical energy into electrical energy and provide electrical energy to the voltage protection device 2 and the circuit breaker 3 .

[0048] The generator 1 may be a gas generator, for example.

[0049] The voltage protection device 2 is used to collect the power supply voltage of the generator 1 in real time, process the power supply voltage of the generator 1, obtain a first voltage signal, and input the first voltage signal to the voltage protection device 2. The first voltage signal can reflect the current voltage value of the generator 1.

[0050] The voltage protection device 2 receives the first voltage signal and determines whether the power supply voltage of the generator is undervoltage, overvoltage or normal according to the first voltage signal.

[0051] When the supply voltage is undervoltage or overvoltage, the voltage protection device 2 controls the circuit between the generator 1, the energy storage motor 30 and the voltage protection device 2 to be disconnected, thereby disconnecting the energy storage motor 30 from the generator 1 and putting the energy storage motor 30 in a power-off state.

[0052] When the power supply voltage is normal, the voltage protection device 2 controls the circuit connection between the generator 1, the energy storage motor 30 and the voltage protection device 2, so that the energy storage motor 30 is connected to the generator 1, so that the energy storage motor 30 is in working state.

[0053] The circuit breaker 3 is used to distribute electrical energy and protect circuits and equipment from overvoltage, undervoltage, short circuit, etc.

[0054] In some examples, the circuit breaker 3 is a frame-type circuit breaker, such as CDW1-2000, HLDW1 series, etc.

[0055] Based on this, the voltage protection device 2 can disconnect the generator 1 from the energy storage motor 30 according to the first voltage signal when the generator 1 is undervoltage or overvoltage, thereby protecting the energy storage motor and the circuit; or, when the power supply voltage of the generator 1 is normal, maintain the connection between the generator 1 and the energy storage motor 30, so that the generator 1 can normally store energy for the energy storage motor 30, avoiding the problem that the energy storage motor 30 may be blocked due to the low and unstable power supply voltage of the generator 1 at the beginning, thereby causing damage to the circuit breaker 3, avoiding fire and causing personal and property losses, protecting the circuit breaker 3, and ensuring the safety of people and property.

[0056] Next, combine Figure 2 , describes in detail the specific implementation method of the voltage protection device 2 provided in the embodiment of the present application.

[0057] See also Figure 2 , Figure 2 This is a schematic diagram of the structure of a voltage protection device provided in one embodiment of the present application. Figure 2 As shown, the voltage protection device 2 provided in the present application may include: a sampling circuit 20 , a control circuit 21 and a driving switch circuit 22 .

[0058] The first end of the sampling circuit 20 is electrically connected to the generator 1 , and the second end of the sampling circuit 20 is electrically connected to the first end of the control circuit 21 .

[0059] The first end of the sampling circuit 20 is electrically connected to the generator 1 , which means that the first end of the sampling circuit 20 is electrically connected to the live wire of the generator 1 .

[0060] The second end of the control circuit 21 is electrically connected to the first end of the driving switch circuit 22 .

[0061] The second end of the driving switch circuit 22 is electrically connected to the generator 1 , and the third end of the driving switch circuit 22 is electrically connected to the second end of the energy storage motor 30 .

[0062] exist Figure 2 In the figure, the first terminal of the sampling circuit 20 is marked as 1, and the second terminal of the sampling circuit 20 is marked as 2. The first terminal of the control circuit 21 is marked as 1, and the second terminal of the control circuit 21 is marked as 2. The first terminal of the driving switch circuit 22 is marked as 1, the second terminal of the driving switch circuit 22 is marked as 2, and the third terminal of the driving switch circuit 22 is marked as 3.

[0063] The sampling circuit 20 is used to collect and process the power supply voltage of the generator 1 in real time to obtain a first voltage signal.

[0064] After starting, the generator 1 gradually increases from 0 voltage to a stable voltage. During this voltage increase, the voltage is relatively unstable. The sampling circuit 20 can collect the supply voltage of the generator 1 in real time and perform processing such as stepping down and filtering the supply voltage to convert AC to DC, thereby obtaining a first voltage signal.

[0065] In some examples, the sampling circuit 20 can sample the supply voltage of the generator 1 based on a preset frequency. For example, if the preset frequency is 10 Hz, the sampling circuit 20 samples the supply voltage of the generator 1 10 times per second. The higher the preset frequency, the more supply voltage the sampling circuit 20 can sample, thereby more accurately reflecting changes in the supply voltage of the generator 1.

[0066] The sampling circuit 20 is further configured to output a first voltage signal to the control circuit 21 via a second terminal of the sampling circuit 20 .

[0067] The first voltage signal can reflect the magnitude of the current power supply voltage of the generator 1 , so that the control circuit 21 can determine the magnitude of the power supply voltage according to the magnitude of the first voltage signal and judge whether to connect the energy storage motor 30 to the generator 1 .

[0068] The control circuit 21 is configured to receive a first voltage signal.

[0069] The control circuit 21 may be implemented by an integrated circuit chip, such as STM8S003F3, STM32F407 or STL130N6F7.

[0070] In some examples, when the control circuit 21 is an STM8S003F3, the first end of the control circuit 21 may be the PD3 / AIN4 pin of the STM8S003F3, and the second end of the control circuit 21 may be the PC6 / SPIMOSI pin of the STM8S003F3.

[0071] After receiving the first voltage signal, the control circuit 21 may determine whether the first voltage signal is within a preset voltage range.

[0072] The control circuit 21 may determine a preset voltage range according to the rated voltage of the energy storage motor 30 .

[0073] In some examples, the preset voltage range is 85% to 110% of the rated voltage of the energy storage motor 30 .

[0074] For example, the rated voltage of the circuit breaker 3 is 400V, and the preset voltage range is 340V to 440V.

[0075] When the first voltage signal is outside the preset voltage range, if the first voltage signal is less than the preset voltage range, the control circuit 21 can determine that the generator 1 is undervoltage. If the first voltage signal is greater than the preset voltage range, the control circuit 21 can determine that the generator 1 is overvoltage. In the case of undervoltage or overvoltage, the supply voltage of the generator 1 cannot support the normal operation of the energy storage motor 30.

[0076] Therefore, the preset voltage range can specify the voltage range in which the energy storage motor 30 can operate normally. The control circuit 21 can determine whether the current power supply voltage of the generator 1 can support the normal operation of the energy storage motor 30 based on the preset voltage range and the first voltage signal.

[0077] Specifically, if the control circuit 21 determines that the first voltage signal is within the preset voltage range, the control circuit 21 outputs the first control signal to the driving switch circuit 22 .

[0078] If the control circuit 21 determines that the first voltage signal is outside the preset voltage range, the control circuit 21 outputs a second control signal to the driving switch circuit 22 .

[0079] The first control signal is used to control the energy storage motor 30 to be in a working state, and the second control signal is used to control the energy storage motor 30 to be in a power-off state.

[0080] The driving switch circuit 22 is configured to receive a first control signal or a second control signal.

[0081] When the drive switch circuit 22 receives the first control signal, the drive switch circuit 22 controls the energy storage motor 30 to be in an operating state according to the first control signal. When the drive switch circuit 22 receives the second control signal, the drive switch circuit 22 controls the energy storage motor 30 to be in a power-off state according to the second control signal, thereby achieving undervoltage protection or overvoltage protection.

[0082] The driving switch circuit 22 can be implemented by a driving circuit and a relay.

[0083] The driving circuit is used to drive the relay according to the first control signal or the second control signal. The relay is used to control the energy storage motor 30 to be in an operating state or a power-off state.

[0084] Taking the drive switch circuit 22 including the drive circuit and the relay as an example, specifically, when receiving the first control signal, the drive circuit controls the relay to switch the common contact, forming a closed loop between the energy storage motor 30, the generator 1 and the drive switch circuit 22, so that the energy storage motor 30 receives the power supply voltage provided by the generator 1 and enters the working state.

[0085] When receiving the second control signal, the drive circuit controls the relay to switch the common contact, disconnecting the energy storage motor 30 from the generator 1 , thereby putting the energy storage motor 30 into a power-off state.

[0086] The connection between the relay and the energy storage motor 30 can be of the following types.

[0087] 1. Considering that the initial supply voltage increases from 0 when the generator 1 is started, the connection mode between the relay and the energy storage motor 30 can be that the normally closed contact is open and the normally open contact is connected to the energy storage motor 30.

[0088] In a normal state, the common contact of the relay is connected to the normally closed contact, and the normally closed contact is open. In a normal state, the connection between the energy storage motor 30 and the generator 1 is disconnected.

[0089] Thus, during the initial startup of generator 1, the supply voltage is outside the preset voltage range. The drive circuit receives the second control signal, achieving undervoltage protection without switching the relay's common contact. When the supply voltage gradually increases to within the preset voltage range, the drive circuit receives the first control signal, thereby controlling the relay's common contact to connect to the normally open contact, forming a closed loop between the energy storage motor 30, generator 1, and drive switch circuit 22. This allows the energy storage motor 30 to enter operation upon receiving the supply voltage from generator 1.

[0090] If the supply voltage increases to a level greater than the preset voltage range, the drive circuit receives a second control signal, so that the drive circuit can control the common contact of the relay to connect with the normally closed contact, disconnecting the energy storage motor 30 and the generator 1 to achieve overvoltage protection.

[0091] 2. The electrical appliance and the energy storage motor 30 may also be connected in a manner that the normally open contact is left unconnected and the normally closed contact is connected to the energy storage motor 30 .

[0092] In a normal state, the common contact of the relay is connected to the normally closed contact, and the normally closed contact is connected to the energy storage motor 30 . In a normal state, the connection between the energy storage motor 30 and the generator 1 has been established.

[0093] Thus, during the initial startup of generator 1, the supply voltage is outside the preset voltage range. The drive circuit receives the second control signal and controls the relay's common contact to connect to the normally open contact, implementing undervoltage protection. When the supply voltage gradually increases to within the preset voltage range, the drive circuit receives the first control signal, controlling the relay's common contact to connect to the normally closed contact, forming a closed loop between the energy storage motor 30, generator 1, and drive switch circuit 22. This allows the energy storage motor 30 to receive the supply voltage provided by generator 1 and enter an operating state.

[0094] If the supply voltage increases to a level greater than the preset voltage range, the drive circuit receives a second control signal, so that the drive circuit can control the common contact of the relay to connect with the normally open contact, disconnecting the connection between the energy storage motor 30 and the generator 1 to achieve overvoltage protection.

[0095] When the connection method of the above-mentioned method 1 is adopted, initially, the connection between the energy storage motor 30 and the generator 1 is in a disconnected state, and the driving switch circuit 22 does not need to change the normal state of the relay. The connection state of the relay is changed only when the power supply voltage increases to within the preset voltage range, thereby being able to more accurately achieve circuit breaker protection.

[0096] In an embodiment of the present application, a first end of a sampling circuit of a voltage protection device is electrically connected to a generator, a second end of the sampling circuit is electrically connected to a first end of a control circuit, a second end of the control circuit is electrically connected to a first end of a drive switch circuit, a second end of the drive switch circuit is electrically connected to a generator, and a third end of the drive switch circuit is electrically connected to a second end of an energy storage motor, so that the sampling circuit can collect and process the power supply voltage of the generator in real time, obtain a first voltage signal, and output the first voltage signal to the control circuit. The control circuit receives the first voltage signal and outputs a first control signal to the drive switch circuit when the first voltage signal is outside a preset voltage range, or outputs a second control signal to the drive switch circuit when the first voltage signal is within the preset voltage range. The drive switch circuit receives the first control signal. Or a second control signal is received, and the energy storage motor is controlled to be in a working state according to the first control signal, or the energy storage motor is controlled to be in a power-off state according to the second control signal. Thus, even when the power supply voltage is low, that is, when the generator is undervoltage, or when the generator is overvoltage, the connection between the generator and the energy storage motor can be disconnected in time to protect the energy storage motor and the circuit breaker. Alternatively, when the power supply voltage of the generator is normal, the connection between the generator and the energy storage motor is maintained so that the generator can normally store energy for the energy storage motor, thereby avoiding the problem that the energy storage motor 30 may be blocked due to the low and unstable power supply voltage of the generator at the initial time, or when the power supply voltage of the generator is too high, thereby causing damage to the circuit breaker 3, thereby avoiding fire and personal and property losses, protecting the circuit breaker, and ensuring the safety of people and property.

[0097] Next, combine Figure 3 , the structure of the driving switch circuit 22 provided in the embodiment of the present application is described in detail.

[0098] See also Figure 3 , Figure 3 This is a schematic diagram of the structure of a voltage protection device provided in one embodiment of the present application. Figure 3 As shown, the driving switch circuit 22 includes: a driving circuit 220 and a switch circuit 221 .

[0099] The switch circuit 221 includes a common contact COM, a normally closed contact P, a normally open contact Q, and a coil.

[0100] The first end of the drive circuit 220 is electrically connected to the second end of the control circuit 21, the second end of the drive circuit 220 is electrically connected to the coil, the common contact COM is electrically connected to the generator 1, the normally closed contact P is unconnected, and the normally open contact Q is electrically connected to the second end of the energy storage motor 30. Figure 3 The switch circuit 221 shown is in a normal state, that is, in a normal state, the common contact COM is connected to the normally closed contact P, and the circuit between the energy storage motor 30 and the generator 1 is disconnected.

[0101] The common contact COM is electrically connected to the generator 1 , which means that the common contact COM is electrically connected to the neutral line of the generator 1 .

[0102] Among them, Figure 3 In FIG, the first terminal of the driving circuit 220 is marked as 1, and the second terminal of the driving circuit 220 is marked as 2. The common contact COM is marked as COM, the normally closed contact P is marked as P, and the normally open contact Q is marked as Q.

[0103] The driving circuit 220 may be implemented by a driving chip, for example, the driving circuit 220 may be ULN2003A.

[0104] When the driving circuit 220 is a driving chip ULN2003A, the first end of the driving circuit 220 may be the IN4 pin of the ULN2003A, and the second end of the driving circuit 220 may be the OUT4 pin of the ULN2003A.

[0105] When the coil is energized, the common contact COM can be connected to the normally open contact Q, and when the coil is de-energized, the common contact COM can be connected to the normally closed contact P.

[0106] Thus, when the drive circuit 220 receives the first control signal input by the control circuit 21 through the first end of the drive circuit 220, the drive circuit 220 is used to control the coil to be energized according to the first control signal, thereby controlling the common contact COM to be connected to the normally open contact Q, so that the energy storage motor 30 works through the loop formed by the common contact COM, the normally open contact Q, the generator 1 and the energy storage motor 3.

[0107] When the drive circuit 220 receives the second control signal input by the control circuit 21 through the first end of the drive circuit 220, the drive circuit 220 controls the coil to be de-energized according to the second control signal, thereby controlling the common contact COM to be connected to the normally closed contact P, so that the energy storage motor 30 is disconnected from the generator 1.

[0108] Therefore, when the power supply voltage of the generator 1 is outside the preset voltage range, that is, when the generator 1 is undervoltage or overvoltage, the drive circuit 220 controls the circuit between the energy storage motor 30 and the generator 1 to disconnect, thereby protecting the energy storage motor 30 and the circuit breaker 3.

[0109] The driving circuit 220 further includes a third terminal, and the third terminal of the driving circuit 220 is grounded.

[0110] When the driving circuit 220 is a driving chip ULN2003A, the third terminal of the driving circuit 220 may be a GND pin of the ULN2003A.

[0111] Based on the above exemplary description, the sampling circuit 20 can be Figure 4The structure shown is implemented.

[0112] See also Figure 4 , Figure 4 This is a schematic diagram of a sampling circuit provided in one embodiment of the present application. Figure 4 As shown, the sampling circuit 20 includes a step-down circuit 200 and a filtering circuit 201 .

[0113] The step-down circuit 200 includes a first transistor Q1 , a first resistor R1 , and a second resistor R2 . The filter circuit 201 includes a third resistor R3 , a first capacitor C1 , and a second capacitor C2 .

[0114] The resistance of the first resistor R1 may be 100 kΩ, the resistance of the second resistor R2 may be 100 kΩ, the resistance of the third resistor R3 may be 3600 Ω, and the capacitance of the second capacitor C2 may be 0.1 μF.

[0115] The first capacitor C1 may be implemented as an electrolytic capacitor, with a capacitance of 10 μF and a withstand voltage of 50 V.

[0116] Wherein, the first end of the first transistor Q1 is connected to the generator 1 ( Figure 4 The first end of the first transistor Q1 is electrically connected to the first end of the first resistor R1, the second end of the first resistor R1 is electrically connected to the first end of the second resistor R2, the second end of the second resistor R2 is electrically connected to the first end of the third resistor R3, the second end of the third resistor R3 is grounded, the first end of the first capacitor C1 is electrically connected to the second end of the second resistor R2, the second end of the first capacitor C1 is grounded, the first end of the second capacitor C2 is electrically connected to the second end of the second resistor R2, the second end of the second capacitor C2 is grounded, and the first end of the second capacitor C2 is electrically connected to the control circuit 21 ( Figure 4 The first end of the MOSFET (not shown) is electrically connected.

[0117] The first end of the first transistor Q1 is denoted as 1, and the second end of the first transistor Q1 is denoted as 2. The first end of the first resistor R1 is denoted as 1, and the second end of the first resistor R1 is denoted as 2. The first end of the second resistor R2 is denoted as 1, and the second end of the second resistor R2 is denoted as 2. The first end of the third resistor R3 is denoted as 1, and the second end of the third resistor R3 is denoted as 2. The first end of the first capacitor C1 is denoted as 1, and the second end of the first capacitor C1 is denoted as 2. The first end of the second capacitor C2 is denoted as 1, and the second end of the second capacitor C2 is denoted as 2.

[0118] The first transistor Q1 may be a diode. When the first transistor Q1 is a diode, the first end of the first transistor Q1 is the anode of the diode, and the second end of the first transistor Q1 is the cathode of the diode.

[0119] The first capacitor C1 can be implemented as an electrolytic capacitor. When the first capacitor C1 is an electrolytic capacitor, the first end of the first capacitor C1 is the positive electrode of the electrolytic capacitor, and the second end of the first capacitor C1 is the negative electrode of the electrolytic capacitor.

[0120] The step-down circuit 200 is used to reduce the supply voltage of the generator 1 to obtain a second voltage signal.

[0121] The power supply voltage of the generator 1 is stepped down by the step-down circuit 200 so as to be converted into a second voltage signal that can be processed by the control circuit 21 .

[0122] The filter circuit 201 is used to filter the second voltage signal to obtain a first voltage signal, and input the first voltage signal to the control circuit.

[0123] The first voltage signal is filtered by the filter circuit 201 to remove high-frequency interference and convert AC into DC, thereby obtaining the first voltage signal. The first voltage signal can accurately reflect the power supply voltage of the generator 1 .

[0124] Based on the above exemplary description, the voltage protection device further includes: a power supply circuit 23. The structure of the power supply circuit 23 can be as follows Figure 5 shown.

[0125] See also Figure 5 , Figure 5 This is a schematic diagram of the structure of a voltage protection device provided in one embodiment of the present application. Figure 5 As shown, the voltage protection device 2 further includes a power supply circuit 23 .

[0126] The first end of the power supply circuit 23 is electrically connected to the generator 1 , the second end of the power supply circuit 23 is electrically connected to the third end of the control circuit 21 , and the third end of the power supply circuit 23 is electrically connected to the fourth end of the drive switch circuit 22 .

[0127] The first end of the power supply circuit 23 is electrically connected to the generator 1 , which means that the first end of the power supply circuit 23 is electrically connected to the live wire and the neutral wire of the generator 1 respectively.

[0128] The power supply circuit 23 is used to provide power to the control circuit 21 and the driving switch circuit 22 .

[0129] In some examples, the structure of the power supply circuit 23 can be as follows Figure 6 shown.

[0130] See also Figure 6 , Figure 6 This is a schematic diagram of a power supply circuit provided in one embodiment of the present application. Figure 6As shown, the power supply circuit 23 includes: a first step-down circuit 230 , a second step-down circuit 231 and a rectifier circuit 232 .

[0131] The first end of the first step-down circuit 230 is connected to the generator 1 ( Figure 6 The second end of the first step-down circuit 230 is electrically connected to the first end of the rectifier circuit 232, the second end of the rectifier circuit 232 is electrically connected to the first end of the second step-down circuit 231, and the third end of the rectifier circuit 232 is electrically connected to the driving switch circuit 22 ( Figure 6 The second end of the second step-down circuit 231 is electrically connected to the control circuit 21 ( Figure 6 The third end (not shown) is electrically connected.

[0132] Considering that the operating voltage of the drive switch circuit 22 is generally different from the operating voltage of the control circuit 21, and the operating voltage of the drive switch circuit 22 is greater than the operating voltage of the control circuit 21, two step-down circuits can be provided, namely a first step-down circuit 230 and a second step-down circuit 231, to sequentially reduce the power supply voltage of the generator 1.

[0133] The first step-down circuit 230 is used to reduce the power supply voltage of the generator 1 , thereby converting the power supply voltage into a voltage that can be used by the driving switch circuit 22 .

[0134] The rectifier circuit 232 is used to convert the alternating current provided by the generator 1 into direct current, so that the driving switch circuit 22 and the control circuit 21 can operate using the direct current.

[0135] The second step-down circuit 231 is used to further reduce the supply voltage of the generator 1 , thereby converting the supply voltage into a voltage usable by the control circuit 21 .

[0136] For example, when the operating voltage of the drive switch circuit 22 is 12V, the first step-down circuit 230 is used to reduce the power supply voltage of the generator 1 to 12V, thereby providing it to the drive switch circuit 22, thereby enabling the drive switch circuit 22 to operate. When the operating voltage of the control circuit 21 is 5V, the second step-down circuit 231 is used to reduce the 12V voltage to 5V, thereby providing it to the control circuit 21, thereby enabling the control circuit 21 to operate.

[0137] Based on the above exemplary description, the power supply circuit 23 further includes an alarm circuit and an indication circuit.

[0138] Among them, the first end of the alarm circuit is electrically connected to the second end of the second step-down circuit 231, the second end of the alarm circuit is electrically connected to the fourth end of the control circuit 21, the first end of the indication circuit is electrically connected to the second end of the second step-down circuit 231, and the second end of the indication circuit is electrically connected to the fifth end of the control circuit 21.

[0139] In some examples, when the control circuit 21 is an STM8S003F3, the fourth terminal of the control circuit 21 can be the TIM2CH3 / PA3 pin of the STM8S003F3, and the second terminal of the alarm circuit can be connected to the PD3 / AIN4 pin. The fifth terminal of the control circuit 21 can be the PB5 / I2CSDA pin of the STM8S003F3, and the second terminal of the indication circuit can be connected to the PB5 / I2CSDA pin.

[0140] The alarm circuit is used to sound an alarm when the energy storage motor 30 is disconnected from the generator 1 , and the indication circuit is used to indicate that the energy storage motor 30 is in a working state.

[0141] The alarm circuit may be implemented by a light emitting diode. When the alarm circuit is implemented by a light emitting diode, the first end of the alarm circuit may be the anode of the light emitting diode.

[0142] The indicating circuit may be implemented by a light emitting diode. When the indicating circuit is implemented by a light emitting diode, the first end of the indicating circuit may be the anode of the light emitting diode.

[0143] Specifically, the control circuit 21 can simultaneously output a first control signal to the drive switch circuit 22 and an indication signal to the indication circuit, thereby illuminating a light-emitting diode (LED) in the indication circuit, allowing the operator to learn through the indication circuit that the energy storage motor 30 is in operation. Alternatively, the control circuit 21 can simultaneously output a second control signal to the drive switch circuit 22 and an alarm signal to the alarm circuit, thereby illuminating a light-emitting diode (LED) in the alarm circuit, allowing the operator to learn through the alarm circuit that the generator 1 is undervoltage or overvoltage and that the energy storage motor 30 is in the disconnected state, thereby achieving circuit breaker protection.

[0144] Based on the above exemplary description, in some examples, the driving circuit 220 includes a driving chip, and the model of the driving chip is ULN2003A.

[0145] Based on the above exemplary description, in some examples, the switch circuit 221 includes a relay, and the model of the relay is JQC3FF / 012-1Z.

[0146] Based on the above exemplary description, the structure of the power supply circuit 23 can be as follows Figure 7 shown.

[0147] For example, Figure 7 This is a schematic diagram of a power supply circuit provided in one embodiment of the present application. Figure 7As shown, the power supply circuit 23 includes: a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a third capacitor C3, a fourth capacitor C4, a fifth capacitor C5, a sixth capacitor C6, a seventh capacitor C7, a second transistor Q2, a third transistor Q3, a fourth transistor Q4, a fifth transistor Q5, a sixth transistor Q6, a seventh transistor Q7 and an integrated voltage regulator U1.

[0148] The first end of the fourth resistor R4 is electrically connected to the live wire of the generator 1, and the second end of the fourth resistor R4 is electrically connected to the neutral wire of the generator 1. Figure 7 The live wire is represented by L and the neutral wire is represented by N.

[0149] The first end of the fifth resistor R5 is electrically connected to the first end of the fourth resistor R4, the second end of the fifth resistor R5 is electrically connected to the first end of the third capacitor C3, the second end of the third capacitor C3 is electrically connected to the first end of the second transistor Q2, the sixth resistor R6 is connected in series with the seventh resistor R7, and is connected in parallel with the third capacitor C3 between the fifth resistor R5 and the second transistor Q2. The second end of the second transistor Q2 is electrically connected to the first end of the seventh transistor Q7.

[0150] A first end of the third transistor Q3 is electrically connected between the second end of the third capacitor C3 and the first end of the second transistor Q2 , and a second end of the third transistor Q3 is grounded (GND).

[0151] A second end of the fourth transistor Q4 is grounded, a first end of the fourth transistor Q4 is electrically connected to a first end of the fifth transistor Q5, a second end of the fifth transistor Q5 is electrically connected to a second end of the second transistor Q2, a second end of the sixth transistor Q6 is grounded, and a first end of the sixth transistor Q6 is electrically connected to a second end of the second transistor Q2.

[0152] A second end of the fourth capacitor C4 is grounded. A first end of the fourth capacitor C4 is electrically connected between the second end of the second transistor Q2 and the first end of the seventh transistor Q7. The second end of the seventh transistor Q7 is electrically connected to the first end of the eighth resistor R8. A second end of the eighth resistor R8 is electrically connected to the third end of the integrated voltage regulator U1. A second end of the integrated voltage regulator U1 is grounded. A first end of the fifth capacitor C5 is electrically connected to the second end of the eighth resistor R8. A second end of the fifth capacitor C5 is grounded. A first end of the sixth capacitor C6 is electrically connected to the second end of the eighth resistor R8. A second end of the sixth capacitor C6 is grounded. A second end of the seventh capacitor C7 is grounded. A first end of the seventh capacitor C7 is electrically connected to the first end of the integrated voltage regulator U1.

[0153] The second terminal of the second transistor Q2 outputs a voltage V1, driving the switch circuit 22 ( Figure 7The fourth end of the transistor 22 (not shown) is electrically connected to the second end of the second transistor Q2, so that the power supply circuit 23 can provide a voltage to the driving switch circuit 22 to enable the driving switch circuit 22 to work.

[0154] The first terminal of the integrated voltage regulator U1 outputs a voltage V2, and the control circuit 21 ( Figure 7 The third end of the integrated voltage regulator U1 is electrically connected to the first end of the integrated voltage regulator U1, so that the power supply circuit 23 can provide voltage to the control circuit 21 to enable the control circuit 21 to work.

[0155] The fourth resistor R4, the fifth resistor R5, the sixth resistor R6, the seventh resistor R7 and the third capacitor C3 form a first step-down circuit 230, thereby first stepping down the supply voltage of the generator 1 to a voltage capable of supporting the normal operation of the driving switch circuit 22.

[0156] Among them, the second transistor Q2, the third transistor Q3, the fourth transistor Q4, the fifth transistor Q5, and the sixth transistor Q6 form a rectifier circuit 232, so as to convert the power supply voltage after the first step-down from AC to DC, so that the voltage protection device can work normally.

[0157] The seventh transistor Q7, the fourth capacitor C4, the eighth resistor R8, the fifth capacitor C5, the sixth capacitor C6, the seventh capacitor C7 and the integrated voltage regulator U1 form a second step-down circuit 231. This allows the supply voltage after the first step-down to be stepped down a second time to a voltage that can support the normal operation of the control circuit 21.

[0158] The fourth resistor R4 may be a variable resistor, such as 821K10.

[0159] The resistance of the fifth resistor R5 may be 220 ohms, the resistance of the sixth resistor R6 may be 330 k ohms, the resistance of the seventh resistor R7 may be 330 k ohms, and the resistance of the eighth resistor R8 may be 100 ohms.

[0160] The second transistor Q2 , the third transistor Q3 , the fourth transistor Q4 , the fifth transistor Q5 , and the seventh transistor Q7 may all be diodes.

[0161] The sixth transistor Q6 may be a voltage-stabilizing diode.

[0162] When the second transistor Q2, the third transistor Q3, the fourth transistor Q4, the fifth transistor Q5, and the seventh transistor Q7 are diodes, and the sixth transistor Q6 is a Zener diode, the first end of the second transistor Q2 is the anode of the diode, and the second end of the second transistor Q2 is the cathode of the diode. The first end of the third transistor Q3 is the cathode of the diode, and the second end of the third transistor Q3 is the anode of the diode. The first end of the fourth transistor Q4 is the cathode of the diode, and the second end of the fourth transistor Q4 is the anode of the diode. The first end of the fifth transistor Q5 is the anode of the diode, and the second end of the fifth transistor Q5 is the cathode of the diode. The first end of the sixth transistor Q6 is the cathode of the Zener diode, and the second end of the sixth transistor Q6 is the anode of the Zener diode. The first end of the seventh transistor Q7 is the anode of the diode, and the second end of the seventh transistor Q7 is the cathode of the diode.

[0163] The third capacitor C3 may have a capacitance of 330 nF, the fourth capacitor C4 may be an electrolytic capacitor, the capacitance of the fourth capacitor C4 may be 470 μF, and the withstand voltage may be 25 V, and the fifth capacitor C5 may be an electrolytic capacitor, the capacitance of the fifth capacitor C5 may be 470 μF, and the withstand voltage may be 25 V.

[0164] The capacitance of the sixth capacitor C6 may be 0.1 μF.

[0165] The seventh capacitor C7 may be an electrolytic capacitor, the capacitance of the seventh capacitor C7 may be 100 μF, and the withstand voltage may be 16V.

[0166] When the fourth capacitor C4, the fifth capacitor C5, and the seventh capacitor C7 are electrolytic capacitors, the first end of the fourth capacitor C4 is the positive electrode of the electrolytic capacitor, and the second end of the fourth capacitor C4 is the negative electrode of the electrolytic capacitor. The first end of the fifth capacitor C5 is the positive electrode of the electrolytic capacitor, and the second end of the fifth capacitor C5 is the negative electrode of the electrolytic capacitor. The first end of the seventh capacitor C7 is the positive electrode of the electrolytic capacitor, and the second end of the seventh capacitor C7 is the negative electrode of the electrolytic capacitor.

[0167] The integrated voltage regulator U1 may be, for example, 78L05.

[0168] When the integrated voltage regulator U1 is 78L05, the first end of the integrated voltage regulator U1 is the VO pin of 78L05, the second end of the integrated voltage regulator U1 is the CND pin of 78L05, and the third end of the integrated voltage regulator U1 is the VI pin of 78L05.

[0169] Finally, it should be noted that the above embodiments are merely specific implementations of this application, but the scope of protection of this application is not limited thereto. Any changes or substitutions within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A voltage protection device, characterized in that: Applied to a generator system, the generator system further includes a generator and a circuit breaker, the first end of the energy storage motor in the circuit breaker is electrically connected to the generator, and the voltage protection device includes: a sampling circuit, a control circuit, and a drive switch circuit; The first end of the sampling circuit is electrically connected to the generator, the second end of the sampling circuit is electrically connected to the first end of the control circuit, the second end of the control circuit is electrically connected to the first end of the drive switch circuit, the second end of the drive switch circuit is electrically connected to the generator, and the third end of the drive switch circuit is electrically connected to the second end of the energy storage motor; The sampling circuit is used to collect and process the power supply voltage of the generator in real time, obtain a first voltage signal, and output the first voltage signal to the control circuit; the control circuit is used to receive the first voltage signal and, when the first voltage signal is outside a preset voltage range, output a first control signal to the drive switch circuit, or, when the first voltage signal is within a preset voltage range, output a second control signal to the drive switch circuit; the drive switch circuit is used to receive the first control signal or the second control signal, and control the energy storage motor to be in a working state according to the first control signal, or, control the energy storage motor to be in a power-off state according to the second control signal.

2. The device according to claim 1, characterized in that The driving switch circuit includes: a driving circuit and a switching circuit, wherein the switching circuit includes a common contact, a normally closed contact, a normally open contact and a coil; The first end of the drive circuit is electrically connected to the second end of the control circuit, the second end of the drive circuit is electrically connected to the coil, the common contact is electrically connected to the generator, the normally closed contact is unconnected, and the normally open contact is electrically connected to the second end of the energy storage motor; The drive circuit is used to control the connection between the common contact and the normally open contact according to the first control signal, so that the energy storage motor operates through the loop formed by the common contact, the normally open contact, the generator and the energy storage motor, or the drive circuit is used to control the connection between the common contact and the normally closed contact according to the second control signal, so that the energy storage motor is disconnected from the generator.

3. The device according to claim 1 or 2, characterized in that The sampling circuit includes a step-down circuit and a filtering circuit, the step-down circuit includes: a first transistor, a first resistor and a second resistor, and the filtering circuit includes: a third resistor, a first capacitor and a second capacitor; a first end of the first transistor electrically connected to the generator, a second end of the first transistor electrically connected to the first end of the first resistor, a second end of the first resistor electrically connected to the first end of the second resistor, a second end of the second resistor electrically connected to the first end of the third resistor, a second end of the third resistor electrically connected to ground, a first end of the first capacitor electrically connected to the second end of the second resistor, a second end of the first capacitor electrically connected to the second end of the second resistor, a second end of the second capacitor electrically connected to the first end of the control circuit; The step-down circuit is used to reduce the power supply voltage of the generator to obtain a second voltage signal. The filtering circuit is used to filter the second voltage signal to obtain the first voltage signal, and input the first voltage signal to the control circuit.

4. The device according to claim 1 or 2, characterized in that The voltage protection device further includes: a power supply circuit; The first end of the power supply circuit is electrically connected to the generator, the second end of the power supply circuit is electrically connected to the third end of the control circuit, and the third end of the power supply circuit is electrically connected to the fourth end of the drive switch circuit; The power supply circuit is used to provide electrical energy to the control circuit and the drive switch circuit.

5. The device according to claim 4, characterized in that The power supply circuit includes: a first step-down circuit, a second step-down circuit and a rectifier circuit; The first end of the first step-down circuit is electrically connected to the generator, the second end of the first step-down circuit is electrically connected to the first end of the rectifier circuit, the second end of the rectifier circuit is electrically connected to the first end of the second step-down circuit, the third end of the rectifier circuit is electrically connected to the fourth end of the drive switch circuit, and the second end of the second step-down circuit is electrically connected to the third end of the control circuit.

6. The device according to claim 5, characterized in that The power supply circuit also includes an alarm circuit and an indication circuit; The first end of the alarm circuit is electrically connected to the second end of the second step-down circuit, the second end of the alarm circuit is electrically connected to the fourth end of the control circuit, the first end of the indicator circuit is electrically connected to the second end of the second step-down circuit, and the second end of the indicator circuit is electrically connected to the fifth end of the control circuit; The alarm circuit is used to alarm when the energy storage motor is disconnected from the generator, and the indication circuit is used to indicate that the energy storage motor is in a working state.

7. The device according to claim 2, characterized in that The driving circuit includes a driving chip, and the model of the driving chip is ULN2003A.

8. The device according to claim 2, characterized in that The switch circuit includes a relay, and the model of the relay is JQC3FF / 012-1Z.

9. A generator system, characterized in that: The generator system comprises: a generator, a circuit breaker and the voltage protection device according to any one of claims 1 to 8, wherein the circuit breaker comprises an energy storage motor.

10. The system according to claim 9, characterized in that The circuit breaker is a frame type circuit breaker.

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