An electric leakage protection device for electromechanical installation

Abstract

The utility model discloses an electric leakage protection device for electromechanical installation, include: timing module is used for generating timing signal and outputting to control module according to the timing information of setting, control module is used for generating control signal and outputting to first drive module according to timing signal, first drive module is used for generating trip drive signal and outputting to tripping module according to control signal, tripping module, according to trip drive signal executes tripping action to cut off the connection of power supply and load end, tripping detection module is used for gathering the current signal of tripping module and outputting to control module, control module is used for judging whether tripping module executes tripping action according to the signal of tripping detection module output, and generates early warning signal, early warning module is used for sending corresponding alarm signal according to early warning signal. Realized the regular inspection of timing to electric leakage protector and judged and early warning whether the inspection process is completed, avoided the missed inspection risk of artificial regular inspection.

Description

Technical Field

[0001] This utility model relates to the field of leakage current protection technology, specifically to a leakage current protection device for electromechanical installation. Background Technology

[0002] In electromechanical installation, most commonly used equipment requires temporary power connection to operate. The use of residual current circuit breakers (RCCBs) for the power lines is essential. RCCBs are protective devices that automatically disconnect power to prevent electric shock and accidents caused by leakage. When the leakage current of a circuit or electrical equipment exceeds the device's setting value, or when a person or animal is in danger of electric shock, it can quickly activate, cut off the power supply, prevent the accident from escalating, and ensure the safety of people and equipment.

[0003] During the use of a residual current device (RCD), it is necessary to check its proper functioning once a month. If a tripping response occurs, it indicates that the RCD function is normal. If no tripping occurs, it indicates a problem with the RCD function, and the RCD needs to be replaced promptly.

[0004] However, the regular inspection of existing residual current devices (RCDs) requires manual operation, which carries the risk of missed inspections. If an RCD loses its protective function and is not replaced in time, it will threaten the safety of electromechanical installation workers and the corresponding equipment. Summary of the Invention

[0005] To address the shortcomings of existing technologies, the purpose of this utility model is to provide a leakage current protection device for electromechanical installation, which can periodically inspect the leakage current protector and judge and warn whether the inspection process is completed, thereby effectively avoiding the risk of missed inspections that exist in manual periodic inspections.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A leakage current protection device for electromechanical installation, the key features of which include: a timing module, a control module, a first drive module, a tripping module, a tripping detection module, and an early warning module, wherein: The timing module is used to generate timing signals according to the set timing information and output them to the control module; The control module is used to generate control signals based on timing signals and output them to the first drive module; The first drive module is used to generate a trip drive signal according to the control signal and output it to the trip module; The tripping module is used to perform a tripping action according to the tripping drive signal to disconnect the power supply from the load terminal; The trip detection module is used to collect the current signal of the trip module and output it to the control module; The control module is used to determine whether the tripping module has performed a tripping action based on the signal output by the tripping detection module, and to generate an early warning signal; The early warning module is used to issue corresponding alarm signals based on the early warning signal.

[0007] Furthermore, the device also includes a second drive module and a suction module, wherein: The second drive module is used to generate an engagement drive signal based on the control signal output by the control module; The suction module is used to perform a suction action according to the suction drive signal to connect the power supply and the load.

[0008] Furthermore, the circuit structures of the first driving module and the second driving module are identical, wherein: The first driving module includes transistors Q2 and Q1, and a relay K1. The collector of transistor Q2 is connected to the first signal output terminal of the control module. The collector of transistor Q2 is connected to the positive terminal of the DC power supply. The emitter of transistor Q2 is connected to the base of transistor Q1 after being connected in series with resistor R11. The collector of transistor Q1 is connected to the positive terminal of the DC power supply after being connected in series with the coil winding of relay K1 and resistor R14. The emitter of transistor Q1 is grounded. The switching part of relay K1 is connected to the power supply circuit of the tripping module. The emitter of transistor Q2 is also connected to the anode of light-emitting diode D1 after being connected in series with resistor R13. The cathode of light-emitting diode D1 is grounded. The common terminal of the base of transistor Q1 and resistor R12 is also grounded after being connected in series with capacitor C11.

[0009] Furthermore, the device includes a power supply module, which is used to rectify and step down the external AC power supply into DC power, and to supply power to the timing module, control module and early warning module.

[0010] Furthermore, the power supply module includes an energy harvesting unit, a first step-down unit, a second step-down unit, and a third step-down unit. The energy harvesting unit is used to obtain electrical energy from an external AC power source and rectify and step down the voltage to DC power. The first step-down unit is used to step down the DC power to a first power source to power the timing module. The second step-down unit is used to step down the DC power to a second power source to power the control module. The third step-down unit is used to step down the DC power to a third power source to power the early warning module.

[0011] Furthermore, the tripping detection module includes a current sampling unit, an operational amplifier unit, and a comparator unit, wherein: The current sampling unit is used to collect the current signal of the coil winding in the trip module; The operational amplifier unit is used to amplify the current signal acquired by the current sampling unit; The comparator unit is used to compare the amplified current signal with at least one threshold, and outputs a high-level signal to the control module when the current is higher than any threshold.

[0012] Furthermore, both the tripping module and the engaging module are composed of a drive coil and an actuation switch.

[0013] Furthermore, the warning module employs at least one of the following warning methods: sound, light, and display.

[0014] The significant advantages of this invention are: 1. This device has both timer and leakage protection functions, enabling regular inspection of the leakage current protector and judgment and early warning of whether the inspection process is completed. This effectively avoids the risk of missed inspections that may occur with manual periodic inspections, making the entire periodic inspection process more reliable. At the same time, it makes the use of the leakage current protection device safer and more reliable, ensuring the safety of electrical equipment and users, and eliminating safety hazards.

[0015] 2. With the addition of tripping and closing modules, this device can automatically disconnect or connect the power supply to the load during periodic inspections, avoiding the need for manual reconnection to restore power and thus reducing the impact on continuous electromechanical installation.

[0016] 3. Each module in this device has an independent power supply and strong anti-interference performance, making the device more reliable in terms of leakage protection. Attached Figure Description

[0017] Figure 1 This is a circuit diagram illustrating the principle structure of this utility model. Figure 2 This is the circuit diagram of the power supply module. Figure 3 This is the circuit diagram of the trip detection module; Figure 4 This is the circuit structure diagram of the first driving module. Detailed Implementation

[0018] The specific embodiments and working principle of this utility model will be further described in detail below with reference to the accompanying drawings.

[0019] like Figure 1As shown, a leakage current protection device for electromechanical installation includes a power supply module, a timing module, a control module, a first drive module, a tripping module, a tripping detection module, an early warning module, a second drive module, and a closing module. The output terminal of the timing module is connected to the first input terminal of the control module. The two input terminals of the control module are respectively connected to the output terminals of the first drive module and the second drive module. The output terminal of the first drive module is connected to the input terminal of the tripping module. The output terminal of the second drive module is connected to the input terminal of the closing module. The input terminal of the tripping detection module is located inside the tripping module. The power output terminal of the power supply module is respectively connected to the power input terminals of the timing module, the control module, and the early warning module. Specifically: The timing module is used to generate timing signals according to the set timing information and output them to the control module. In implementation, a 555 timer can be used. The control module is used to generate control signals based on timing signals and output them to the first drive module. In implementation, a microcontroller can be used. The first drive module is used to generate a trip drive signal according to the control signal and output it to the trip module; The tripping module is used to perform a tripping action according to the tripping drive signal to disconnect the power supply from the load terminal; The trip detection module is used to collect the current signal of the trip module and output it to the control module; The control module is also used to determine whether the tripping module has performed a tripping action based on the signal output by the tripping detection module, and to generate an early warning signal; The early warning module is used to issue corresponding alarm signals based on the early warning signal; The second drive module is used to generate an engagement drive signal based on the control signal output by the control module; The suction module is used to perform a suction action according to the suction drive signal to connect the power supply and the load end. The power supply module is used to rectify and step down the external AC power supply into DC power, and to power the timing module, control module and early warning module, so that each module in this device has an independent power supply, strong anti-interference performance, and more reliable leakage protection function.

[0020] See appendix Figure 2 The power supply module includes an energy harvesting unit, a first step-down unit, a second step-down unit, and a third step-down unit. The energy harvesting unit is used to obtain electrical energy from an external AC power source and rectify and step down the voltage to DC power. The first step-down unit is used to step down the DC power to a first power source to power the timing module. The second step-down unit is used to step down the DC power to a second power source to power the control module. The third step-down unit is used to step down the DC power to a third power source to power the early warning module.

[0021] In this embodiment, both the tripping module and the engaging module are composed of a drive coil and an execution switch. The voltage input terminal of the drive coil is connected to the output terminal of the first drive module or the second drive module, and the execution switch is connected between the power supply and the load terminal, enabling it to perform tripping or engaging actions under the drive of the drive coil.

[0022] See appendix Figure 3 The tripping detection module includes a current sampling unit, an operational amplifier unit, and a comparator unit, wherein: The current sampling unit is used to collect the current signal of the coil winding in the trip module, and a current transformer can be used in implementation. The operational amplifier unit is used to amplify the current signal acquired by the current sampling unit. In implementation, an LM358 operational amplifier can be used. The comparator unit is used to compare the amplified current signal with at least one threshold. In implementation, an LM358 operational amplifier can be used, and a high-level signal is output to the control module when the current is above any threshold.

[0023] When the trip module performs a tripping action according to the drive signal, a current signal will inevitably be generated in its drive coil. Therefore, by detecting the current signal of the trip module, it is possible to determine whether the tripping module has performed a tripping action. Thus, in this embodiment, a current sampling unit collects the current signal of the coil winding in the trip module, and an operational amplifier unit amplifies the current signal collected by the current sampling unit, thereby improving the detection accuracy of the current signal. In addition, a comparator unit compares the amplified current signal with at least one threshold, and outputs a high-level signal to the control module when the signal is higher than any threshold. When the control module receives the high-level signal, it can determine that the tripping module has performed a tripping action and issue a warning signal based on the determination result.

[0024] The tripping detection module described above determines whether the inspection process is complete and provides early warnings, thereby making the entire periodic inspection process more reliable and the entire leakage protection device safer and more reliable to use.

[0025] In this example, to simplify the circuit structure and save on circuit costs, the circuit structure of the first driving module is identical to that of the second driving module. Specifically, the circuit structure of the first driving module is as follows: Figure 4As shown, the system includes transistors Q2 and Q1, and a relay K1. The collector of transistor Q2 is connected to the first signal output terminal of the control module. The collector of transistor Q2 is connected to the positive terminal of the DC power supply. The emitter of transistor Q2 is connected to the base of transistor Q1 after being connected in series with resistor R11. The collector of transistor Q1 is connected to the positive terminal of the DC power supply after being connected in series with the coil winding of relay K1 and resistor R14. The emitter of transistor Q1 is grounded. The switching part of relay K1 is connected to the power supply circuit of the tripping module. The base of transistor Q2 is also grounded through resistor R12. The emitter of transistor Q2 is also connected to the anode of LED D1 after being connected in reverse parallel with resistor R13. The cathode of LED D1 is grounded. The common terminal of the base of transistor Q1 and resistor R12 is also grounded after being connected in capacitor C11. A Zener diode D2 is also connected in reverse parallel with the coil winding of relay K1.

[0026] When the control module outputs a high-level drive signal to the base of transistor Q2, transistor Q2 turns on. Then, the emitter of transistor Q2 outputs a high level, causing transistor Q1 to turn on. This energizes the coil winding of relay K1, closing the driver switch and thus turning on the power circuit of the tripping module, thereby realizing the tripping action of the leakage current protection device.

[0027] In this embodiment, the early warning module employs at least one of the following warning methods: sound, light, and display. This combination of methods makes it easier for electromechanical installation personnel to receive the corresponding alarm signals issued by the early warning module.

[0028] Based on the above, this device can first set timing information through a timing module or other means. The timing information can be the tripping interval time for periodic checks, or the tripping interval time and engagement interval time for periodic checks. During the use of this device, the timing module generates a timing signal based on the set timing information and outputs it to the control module. The control module generates a first control signal based on the timing signal and outputs it to the first drive module. The first drive module generates a tripping drive signal based on the control signal and outputs it to the tripping module. The tripping module executes a tripping action based on the tripping drive signal to disconnect the power supply from the load terminal. Simultaneously, the tripping detection module collects the current signal from the tripping module and outputs the collected results... The result is output to the control module; the control module is used to determine whether the tripping module has performed a tripping action based on the detection signal output by the tripping detection module, and generate a warning signal; the warning module issues a corresponding alarm signal based on the warning signal to promptly notify the electromechanical installation personnel whether the tripping action has been completed; after determining that the tripping module has completed the tripping action based on the detection signal, the control module generates a second control signal and sends it to the second drive module; the second drive module generates a pull-in drive signal based on the second control signal output by the control module; the pull-in module performs a pull-in action based on the pull-in drive signal to connect the power supply to the load end, thereby realizing the timed automatic inspection, warning and reset power-on of this device.

[0029] In summary, this device combines timed and leakage current protection functions, enabling periodic checks of the leakage current device and providing alerts to confirm completion of the checks. This effectively avoids the risk of missed checks inherent in manual periodic inspections, making the entire periodic inspection process more reliable and ensuring the safety of the leakage current protection device, thus protecting electrical equipment and users and eliminating potential safety hazards. Furthermore, the device's tripping and engaging modules automatically disconnect or connect the power supply to the load during periodic checks, eliminating the need for manual resetting and reducing the impact on continuous electromechanical installation.

[0030] The technical solution provided by this utility model has been described in detail above. Specific examples have been used to illustrate the principle and implementation of this utility model. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core idea of ​​this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principle of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A leakage current protection device for electromechanical installation, characterized in that: It includes a timing module, a control module, a first drive module, a tripping module, a tripping detection module, and an early warning module, among which: The timing module is used to generate timing signals according to the set timing information and output them to the control module; The control module is used to generate control signals based on timing signals and output them to the first drive module; The first drive module is used to generate a trip drive signal according to the control signal and output it to the trip module; The tripping module is used to perform a tripping action according to the tripping drive signal to disconnect the power supply from the load terminal; The trip detection module is used to collect the current signal of the trip module and output it to the control module; The control module is used to determine whether the tripping module has performed a tripping action based on the signal output by the tripping detection module, and to generate an early warning signal; The early warning module is used to issue corresponding alarm signals based on the early warning signal.

2. The leakage current protection device for electromechanical installation according to claim 1, characterized in that: The device further includes a second drive module and a suction module, wherein: The second drive module is used to generate an engagement drive signal based on the control signal output by the control module; The suction module is used to perform a suction action according to the suction drive signal to connect the power supply and the load.

3. The leakage current protection device for electromechanical installation according to claim 2, characterized in that: The circuit structures of the first driving module and the second driving module are identical, wherein: The first driving module includes transistors Q2 and Q1, and a relay K1. The collector of transistor Q2 is connected to the first signal output terminal of the control module. The collector of transistor Q2 is connected to the positive terminal of the DC power supply. The emitter of transistor Q2 is connected to the base of transistor Q1 after being connected in series with resistor R11. The collector of transistor Q1 is connected to the positive terminal of the DC power supply after being connected in series with the coil winding of relay K1 and resistor R14. The emitter of transistor Q1 is grounded. The switching part of relay K1 is connected to the power supply circuit of the tripping module. The emitter of transistor Q2 is also connected to the anode of light-emitting diode D1 after being connected in series with resistor R13. The cathode of light-emitting diode D1 is grounded. The common terminal of the base of transistor Q1 and resistor R12 is also grounded after being connected in series with capacitor C11.

4. The leakage current protection device for electromechanical installation according to claim 1, characterized in that: The device includes a power supply module, which is used to rectify and step down an external AC power supply into a DC power supply, and to supply power to the timing module, control module and early warning module.

5. The leakage current protection device for electromechanical installation according to claim 4, characterized in that: The power supply module includes an energy harvesting unit, a first step-down unit, a second step-down unit, and a third step-down unit. The energy harvesting unit is used to obtain electrical energy from an external AC power source and rectify and step down the voltage to DC power. The first step-down unit is used to step down the DC power to a first power source to power the timing module. The second step-down unit is used to step down the DC power to a second power source to power the control module. The third step-down unit is used to step down the DC power to a third power source to power the early warning module.

6. The leakage current protection device for electromechanical installation according to claim 1, characterized in that: The tripping detection module includes a current sampling unit, an operational amplifier unit, and a comparator unit, wherein: The current sampling unit is used to collect the current signal of the coil winding in the trip module; The operational amplifier unit is used to amplify the current signal acquired by the current sampling unit; The comparator unit is used to compare the amplified current signal with at least one threshold, and outputs a high-level signal to the control module when the current is higher than any threshold.

7. The leakage current protection device for electromechanical installation according to any one of claims 1-6, characterized in that: Both the tripping module and the engaging module consist of a drive coil and an actuation switch.

8. The leakage current protection device for electromechanical installation according to any one of claims 1-6, characterized in that: The warning module employs at least one of the following warning methods: sound, light, and display.

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