Device without generating arc light when null line and live line are short-circuited

Abstract

The utility model relates to a device without generating arc light during short circuit of a null line and a live line, which comprises a capacitor C, a resistor R, a relay K, a power utilization mechanism P, a processor MCU, a temperature detection module T and a temperature detection module S. One end of the capacitor C is connected with a live line L and the relay K, the other end of the capacitor C is connected with the resistor R, and the other end of the resistor R is connected with the other end of the power utilization mechanism P and the other end of the relay K. The temperature detection module T and the temperature detection module S are arranged on a circuit between the resistor R and the electric mechanism P. The control end of the relay K is connected with the signal output end of the MCU, and the signal output ends of the temperature detection module T and the temperature detection module S are connected with the signal input end of the MCU. According to the utility model, safety accidents such as fire disasters and the like can be effectively reduced, and the safety of a circuit system is improved. Compared with a traditional circuit breaker, the circuit breaker provided by the utility model is higher in response speed and higher in reliability. The circuit is suitable for various circuit systems and has a wide application prospect.

Description

Technical Field

[0001] The utility model relates to the technical field of power protection, in particular to a device that does not generate arc light when a neutral line or a live line is short-circuited. Background Art

[0002] With the continuous development of society and the economy, the advancement of modern civilization, and the continuous improvement of living standards, the number and variety of electrical equipment used are increasing, and their power levels are also varying. This often leads to current overloads, which accelerate the aging of circuits and cause electrical fires. The electricity safety situation is becoming increasingly severe, and electrical fires are becoming frequent. According to the "National Fire Yearbook," electrical fires account for 37.5% of all fires and 80% of major fires. This high incidence rate poses catastrophic risks to the country, society, and families, severely impacting the harmonious and healthy development of society and becoming a serious social and livelihood issue. The increasing application of power in energy, transportation, manufacturing, communications, and modern high-rise buildings is driving ever-increasing demands for power control and distribution, and people are increasingly demanding safe electricity use and fire prevention. The power distribution system plays a crucial role in this. With the continuous advancement of technology and the expansion of its application areas, the ability to directly extinguish arcs in power short circuits without sparks, thus eliminating fires, is a universally desired goal.

[0003] Short circuit phenomenon and hazards:

[0004] 1. Definition of short circuit: In a circuit, an abnormal connection occurs between the neutral wire and the live wire, resulting in excessive current and circuit abnormality.

[0005] 2. Hazard manifestations: Short circuit may cause fire, equipment damage, power outage and other safety accidents, which will have a serious impact on production and life.

[0006] 3. Arc generation: When short circuit occurs, high-temperature arc may be generated at the contact point, further exacerbating the hazard.

[0007] Existing technical solutions:

[0008] 1. Traditional circuit breakers: They cut off the circuit through thermal or electromagnetic effects, but the operation time is long and may not be able to prevent arcing in time.

[0009] 2. Electronic protection device: uses electronic technology to detect current anomalies and quickly cut off the circuit, but there is still a risk of false operation or missed operation.

[0010] 3. Other fire prevention measures, such as using flame-retardant materials and setting up fire alarms, cannot directly solve the short-circuit arc problem.

[0011] 3. Causes of arc flash caused by short circuit of neutral and live wires:

[0012] 1. Current mutation: At the moment of short circuit, the current increases sharply, resulting in a sudden drop in voltage and a sharp increase in current density.

[0013] 2. Air breakdown: High current density causes the air to be broken down, forming a conductive channel and generating high-temperature, high-pressure plasma.

[0014] 3. Evaporation of electrode material: When the short-circuit current passes through the electrode, huge heat is generated, causing the electrode material to evaporate instantly, forming metal vapor.

[0015] 4. Arc generation: High-temperature, high-pressure plasma and metal vapor emit strong arcs, causing harm to people and equipment. Utility Model Content

[0016] The utility model provides a device that does not generate arc light when the neutral and live wires are short-circuited, so as to solve the problems mentioned in the prior art.

[0017] In order to achieve the above purpose, the present invention provides the following technical solutions:

[0018] A device for preventing arcing when a neutral wire and a live wire are short-circuited includes a capacitor C, a resistor R, a relay K, an electric device P, a processor MCU, a temperature detection module T, and a temperature detection module S. One end of the capacitor C is connected to a live wire L and the relay K, the other end of the capacitor C is connected to the resistor R, the other end of the resistor R is connected to the electric device P and the other end of the relay K, the temperature detection module T and the temperature detection module S are arranged on a line between the resistor R and the electric device P, the control end of the relay K is connected to a signal output end of the MCU, and the signal output ends of the temperature detection module T and the temperature detection module S are connected to a signal input end of the MCU.

[0019] As a further technical solution of the present invention: the MCU is a single chip microcomputer controller.

[0020] As a further technical solution of the present invention: the relay K is a normally closed contact relay.

[0021] As a further technical solution of the present invention: the temperature detection module S adopts a Hall sensor.

[0022] As a further technical solution of the present invention: the temperature detection module T adopts a PT100 thermistor.

[0023] In the above technical solution, the technical effects and advantages provided by the utility model are:

[0024] This utility model can effectively reduce the occurrence of safety accidents such as fires and improve the safety of circuit systems. Compared with traditional circuit breakers, this patent has faster response speed and higher reliability. This patent is applicable to various circuit systems and has broad application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0026] Figure 1 This is a principle block diagram of the utility model. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] The utility model provides Figure 1 The drawings shown are specifically a device that does not generate arc when the neutral and live wires are short-circuited, including a capacitor C, a resistor R, a relay K, an electrical mechanism P, a processor MCU, a temperature detection module T and a temperature detection module S. One end of the capacitor C is connected to the live wire L and the relay K, the other end of the capacitor C is connected to the resistor R, the other end of the resistor R is connected to the electrical mechanism P and the other end of the relay K, the temperature detection module T and the temperature detection module S are arranged on the line between the resistor R and the electrical mechanism P, the control end of the relay K is connected to the signal output end of the MCU, and the signal output ends of the temperature detection module T and the temperature detection module S are connected to the signal input end of the MCU.

[0029] Example 2: Based on Example 1, the MCU in this design is a single-chip microcomputer controller, but can also be a control unit such as a PLC, logic gate, or voltage comparator. Relay K is a normally closed contact relay. Temperature detection module S uses a Hall effect sensor. Temperature detection module T uses a PT100 thermistor, but other temperature detection units can also be selected based on circuit requirements.

[0030] Here’s how it works:

[0031] The transmission circuit supplies power to the power-consuming mechanism P through the capacitor C and the resistor R. Under normal circumstances, the power-consuming mechanism P can operate with power. At the same time, the temperature detection module T and the temperature detection module S respectively collect the leakage signal and the temperature signal in the circuit, and transmit them to the MCU module in real time. The MCU module processes the input signal through its internal operation unit. When a short circuit occurs and an arc extinguishing operation is required, the MCU module outputs a control signal to the relay K. The coil of the relay K controls its contacts to open. At this time, the relay K in the circuit changes from the normally closed state to the normally open state. The circuit extinguishes the arc through the RC circuit, thereby achieving the effect of protecting the power-consuming mechanism P.

[0032] This utility model can effectively reduce the occurrence of safety accidents such as fires and improve the safety of circuit systems. Compared with traditional circuit breakers, this patent has faster response speed and higher reliability. This patent is applicable to various circuit systems and has broad application prospects.

[0033] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations that come within the meaning and range of equivalents of the claims be embraced within the present invention.

[0034] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment have also been appropriately combined to form other implementation methods that are easy for those skilled in the art to understand.

Claims

1. A device for preventing arcing when the neutral and live wires are short-circuited, comprising a capacitor C, a resistor R, a relay K, an electrical device P, a processor MCU, a temperature detection module T, and a temperature detection module S, characterized in that: One end of the capacitor C is connected to the live wire L and the relay K, the other end of the capacitor C is connected to the resistor R, the other end of the resistor R is connected to the power-consuming mechanism P and the other end of the relay K, the temperature detection module T and the temperature detection module S are arranged on the line between the resistor R and the power-consuming mechanism P, the control end of the relay K is connected to the signal output end of the MCU, and the signal output ends of the temperature detection module T and the temperature detection module S are connected to the signal input end of the MCU.

2. The device for preventing arcing when the neutral and live wires are short-circuited according to claim 1, characterized in that: The MCU is a single chip microcomputer controller.

3. The device for preventing arcing when the neutral and live wires are short-circuited according to claim 1, characterized in that: The relay K is a normally closed contact relay.

4. The device for preventing arcing when the neutral and live wires are short-circuited according to claim 1, characterized in that: The temperature detection module S adopts a Hall sensor.

5. The device for preventing arcing when the neutral and live wires are short-circuited according to claim 4, characterized in that: The temperature detection module T adopts a PT100 thermistor.

Images