CN217469436U

CN217469436U - PE line couple breakage reminding device of TN-S power supply system

Info

Publication number: CN217469436U
Application number: CN202221078622.2U
Authority: CN
Inventors: 赵春广; 赵蕾; 宗小涛; 邵峰; 梁剑峰; 张亚静; 周栓柱
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-05-07
Filing date: 2022-05-07
Publication date: 2022-09-20
Anticipated expiration: 2032-05-07

Abstract

The utility model belongs to the technical field of reminding device, concretely relates to TN-S power supply system' S disconnected reminding device of PE line idol, including optoelectronic coupling device, power module, control switch module and reputation buzzing alarm, optoelectronic coupling device and power module all with control switch module electric connection, control switch module and reputation buzzing alarm electric connection. The photoelectric coupling device comprises a light-emitting element and a photosensitive resistor, wherein the photosensitive resistor is electrically connected with the control switch module through a lead, the light-emitting element is electrically connected to the power line through a lead, and the light-emitting element is arranged on one side of the photosensitive resistor. The utility model discloses the wiring is convenient, only needs to connect a PE line, three lines altogether of a phase line and a zero line. The utility model discloses can carry out the self-checking to the device, analog protection zero line disconnection when pressing the test button, audible-visual buzzer siren reminds the demonstration circuit normal operation this moment, otherwise should get rid of self trouble or wiring go wrong.

Description

PE line couple breakage reminding device of TN-S power supply system

Technical Field

The utility model belongs to the technical field of reminding device, concretely relates to TN-S power supply system' S PE line idol is disconnected reminding device.

Background

At present, residential districts, construction sites, public places and the like all adopt safe TN-S power supply systems, namely three-phase five-wire systems, three live wires, one working zero wire and one protective zero wire (L1, L2, L3 and N, PE). The aim is to lead the equipment into the ground through a protection zero line (PE line) once the equipment leaks electricity after a TN-S system is used, thereby reducing the occurrence of electric shock accidents of personnel. In addition, according to the relevant regulations of electrical safety, special requirements of places such as bathrooms, swimming pools, hospital operating rooms, places needing static elimination, places needing lightning protection grounding and the like on electric shock prevention need to lay reliable protective zero lines (PE lines) or make lightning protection and static prevention grounding lines. The situation that the protection zero line is disconnected or disconnected also often occurs in a power supply system on a construction site. The protection zero line can only play its protective role (the line does not have functional role under normal condition) when the equipment leaks electricity, in other words, if the PE line is disconnected or lost, if the PE line is not specially checked, whether the PE line is normal or not can not be known at all, similarly, if the PE line is lost, the PE line or the ground line is not specially checked, whether the PE line or the ground line is normal or not can not be known at all, and the protection zero line (PE line) has great potential safety hazard under the condition of disconnection or loss, once the equipment leaks electricity, static electricity and lightning stroke, the protection effect of people and equipment can not be lost, and even major accidents can occur.

SUMMERY OF THE UTILITY MODEL

To the technical problem that has very big potential safety hazard under the condition that above-mentioned protection zero line opens circuit or lacks, the utility model provides a high, wide, the convenient PE of wiring of TN-S power supply system of application scope is even disconnected reminding device of security.

In order to solve the technical problem, the utility model discloses a technical scheme be:

the PE line couple breakage reminding device of the TN-S power supply system comprises a photoelectric coupling device, a power supply module, a control switch module and an acousto-optic buzzer alarm, wherein the photoelectric coupling device and the power supply module are both electrically connected with the control switch module, and the control switch module is electrically connected with the acousto-optic buzzer alarm.

The photoelectric coupling device comprises a light-emitting element and a photosensitive resistor, wherein the photosensitive resistor is electrically connected with the control switch module through a lead, the light-emitting element is electrically connected to the power line through a lead, and the light-emitting element is arranged on one side of the photosensitive resistor.

The power cord includes first live wire, second live wire, third live wire, work zero line and protection zero line, light emitting component's one end is connected with first live wire or second live wire or third live wire, light emitting component's the other end is connected with the protection zero line.

The power module is electrically connected with a power line, one end of the power module is connected with a first live wire or a second live wire or a third live wire, and the other end of the power module is connected with a working zero line.

The light-emitting element adopts a glass-packaged neon bulb, the starting voltage range of the neon bulb is 60V-90V, and the current density range of a cathode when the neon bulb emits light is 0.015-10 mA/cm ² 。

And a detection button is connected between the light-emitting element and the protection zero line.

And the light-emitting element is connected with a current limiting resistor in series, and the resistance value of the current limiting resistor is 150k omega.

The power line adopts an AC220V power line.

The power module comprises a first resistor, a second resistor, a first capacitor, a rectifier and a first diode, wherein the first resistor is connected with a first live wire or a second live wire or a third live wire, the first resistor is connected with the second resistor in series, the two ends of the first resistor are connected with the first capacitor in parallel, the input end of the rectifier is connected to the second resistor and a working zero wire respectively, and the first diode is connected between the two output ends of the rectifier in parallel.

The control switch module comprises an NE555 chip, a second capacitor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor and a second diode, one end of the photosensitive resistor is respectively connected to a second pin and a sixth pin of the NE555 chip, one output end of the rectifier is connected with the third resistor in series, the third resistor is connected to a seventh pin of the NE555 chip, the other output end of the rectifier is connected with the second capacitor in series, the second capacitor is connected to the other end of the photosensitive resistor, the fourth resistor is connected between the other end of the photosensitive resistor and the seventh pin of the NE555 chip, the fifth resistor and the sixth resistor are connected between two output ends of the rectifier in parallel, the fifth resistor and the sixth resistor are connected in series, one output end of the rectifier is respectively connected to the fourth pin and the eighth pin of the NE555 chip, the third pin of the NE555 chip is connected to one end of the audible and visual buzzer siren, the other output end of the rectifier is connected to the first pin of the NE555 chip and the other end of the audible and visual buzzer siren respectively, the fifth pin of the NE555 chip is connected to the other end of the audible and visual buzzer siren through a third capacitor, and a second diode is connected between the third capacitor and the third pin of the NE555 chip in parallel.

Compared with the prior art, the utility model, the beneficial effect who has is:

the utility model discloses the wiring is convenient, only needs to connect a PE line, three lines altogether of a phase line and a zero line. The utility model discloses can carry out the self-checking to the device, analog protection zero line disconnection when pressing the test button, audible-visual buzzer siren reminds the demonstration circuit normal operation this moment, otherwise should get rid of self trouble or wiring go wrong. The photoelectric coupling light-emitting element of the utility model is a glass-packaged neon bulb, which is not adopted frequentlyThe neon bulb adopts the light emitting principle of glow discharge in gas discharge, and the cathode current density during light emission can be 0.015-10 mA/cm ² Within the range, the working current can be reduced by increasing the resistance value of the series current-limiting resistor, the sum of leakage current can be effectively controlled, and the limitation of use is greatly eliminated.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.

The structure, ratio, size and the like shown in the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by people familiar with the technology, and are not used for limiting the limit conditions which can be implemented by the present invention, so that the present invention has no technical essential significance, and any structure modification, ratio relationship change or size adjustment should still fall within the scope which can be covered by the technical content disclosed by the present invention without affecting the efficacy and the achievable purpose of the present invention.

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is a circuit diagram of the photoelectric coupling device of the present invention;

fig. 3 is a circuit connection diagram of the power module and the control switch module of the present invention.

Wherein: the photoelectric coupling device comprises a photoelectric coupling device 1, a power module 2, a control switch module 3, an audible and visual buzzer 4, a power line 5, a light-emitting element 101, a photoresistor 102, a detection button 103, a current-limiting resistor 104, a first live wire L1, a second live wire L2, a third live wire L3, a working zero line N, a protection zero line PE, a first resistor R1, a second resistor R2, a first capacitor C1, a rectifier 201, a first diode D1, a chip NE555, a second capacitor C2, a third capacitor C3, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6 and a second diode VD 1.

Detailed Description

To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be described in detail and completely, it is obvious that the described embodiments are only a part of the embodiments of the present invention, but not all embodiments, and the descriptions are only for further explaining the features and advantages of the present invention, and are not intended to limit the claims of the present invention; all other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The following detailed description of the embodiments of the present invention is made with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless otherwise specified.

Throughout the description of the present application, it is to be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

As shown in fig. 1, the utility model discloses the setting is between any one looks of three phase current and protection zero line PE, and when protection zero line PE is normal, utilize current limiting resistor 104 to limit the method of electric current and produce weak current signal, this electric current will be less than power supply system earth-leakage protector's action current far away, and rethread optoelectronic coupling device 1 realizes that the electrical apparatus keeps apart, and control switch module 3 does not have voltage output this moment. When the protection zero line PE lightning protection, prevent that static earth connection takes place to open circuit, control switch module 3 is triggered and switches on reputation buzzing alarm 4, reminds maintenance personal to resume in time and avoids taking place the electric shock accident when the electric leakage.

As shown in fig. 2, when the protection neutral wire PE is normal, the light emitting element 101 is powered on to emit light, so that the resistance of the photo resistor 102 is reduced, a path is formed at the photo resistor 102, and at this time, the control switch module 3 does not output voltage, and the audible and visual buzzer alarm 4 does not work. When the ground wire for protecting the zero line PE from lightning and preventing static electricity is broken, the light-emitting element 101 loses power and is extinguished, so that the resistance value of the photosensitive resistor 102 is increased, the photosensitive resistor 102 is broken, the control switch module 3 is triggered to switch on the acousto-optic buzzer alarm 4, and the acousto-optic buzzer alarm 4 reminds maintenance personnel of timely recovering to avoid electric shock accidents when electric leakage occurs.

As shown in fig. 3, in the present embodiment, the three-phase power is stepped down by the first resistor R1 and the second resistor R2 in the power module 2, and is rectified by the rectifier 201 in the power module 2, so that the power module 2 outputs low-voltage dc power. When the protection zero line PE is normal, the light emitting element 101 is powered on to emit light, so that the resistance value of the photo resistor 102 is reduced, and a path is formed at the photo resistor 102, so that a path is formed between the output end of the rectifier 201 and the second pin of the NE555 chip 301, the second pin of the NE555 chip 301 inputs a high level, the seventh pin of the NE555 chip 301 is in a high resistance state, so that the third pin of the NE555 chip 301 outputs a low level, that is, the third pin of the NE555 chip 301 does not output a voltage, and the audible and visual buzzer alarm 4 does not work. When protection zero line PE lightning protection, when the anti-static earth connection takes place to open circuit, light-emitting element 101 loses the electricity and extinguishes, thereby make the resistance increase of photo resistance 102, photo resistance 102 department forms and opens circuit, thereby form between the output that makes rectifier 201 and the second pin of NE555 chip 301 and open circuit, the second pin input low level of NE555 chip 301, the seventh pin of NE555 chip 301 is the low resistance state, thereby make the third pin output of NE555 chip 301 be the high level, NE555 chip 301's third pin has voltage output promptly, thereby trigger switch-on audible-visual buzzer 4, audible-visual buzzer 4 reminds maintainer in time to resume and takes place the electric shock accident when avoiding the electric leakage.

In the embodiment, the light emitting element 101 of the optoelectronic coupling device 1 is a glass-encapsulated neon bulb, a common light emitting diode is not used as the light emitting element, if the light emitting diode is used as the light emitting element, the working current of the light emitting diode is larger than 2-10mA, and the current of 2mA is required to be satisfied for normal light emission, but the device cannot be installed in many occasions, for example, a two-stage distribution box is generally connected with several or even more than ten terminal switch boxes in a construction site or a public place, and if the total current sum of the light emitting diodes of the devices is installed, the trip action current of a leakage protector in the two-stage distribution box is exceeded (the standard requirement is 30 mA). The neon bulb used for the indicating lamp of the utility model is used as the light-emitting element 1, the light-emitting principle of the neon bulb belongs to the glow discharge in the gas discharge, and the cathode current density can be 0.015-10 mA/cm during the light-emitting ² Within the range, the working current can be reduced by increasing the resistance value of the series current-limiting resistor, the sum of leakage current can be effectively controlled, and the limitation of use is greatly eliminated. The resistance that the neon bulb of the utility model concatenates is 150k omega, and the passing current is about 0.3 MA.

Because the starting voltage of the neon bulb is 60V-90V due to the light-emitting characteristic of the neon bulb, the condition that the zero line grounding resistance is too large and still no alarm is generated can be effectively prevented by utilizing the light-emitting characteristic of the neon bulb with high voltage and low current. However, if the light emitting diode is used, light can be emitted due to the voltage of 1.7V-3V, in other words, the light emitting condition of the light emitting diode can be met only by grounding with one wire (false grounding, the specification requires that the grounding resistance of repeated grounding is 4 Ω, and the grounding resistance of lightning protection grounding is 10 Ω), and the fundamental function that the protection zero line has lost protection under the condition is still not reminded.

In the embodiment, the device can be self-checked, when the detection button 103 is pressed, the protection zero line PE is simulated to be disconnected, the audible and visual buzzer alarm 4 reminds the circuit to work normally, and otherwise, the fault of the device or the problem of wiring is eliminated.

The above description has been made in detail only for the preferred embodiment of the present invention, but the present invention is not limited to the above embodiment, and various changes can be made without departing from the spirit of the present invention within the knowledge scope of those skilled in the art, and all such changes are intended to be encompassed by the present invention.

Claims

1. A PE line even disconnection reminding device of a TN-S power supply system is characterized in that: including optoelectronic coupling device (1), power module (2), control switch module (3) and reputation buzzer siren (4), optoelectronic coupling device (1) and power module (2) all with control switch module (3) electric connection, control switch module (3) and reputation buzzer siren (4) electric connection.

2. The PE line even disconnection reminding device of the TN-S power supply system according to claim 1, characterized in that: the photoelectric coupling device (1) comprises a light-emitting element (101) and a photosensitive resistor (102), wherein the photosensitive resistor (102) is electrically connected with the control switch module (3) through a lead, the light-emitting element (101) is electrically connected onto the power line (5) through a lead, and the light-emitting element (101) is arranged on one side of the photosensitive resistor (102).

3. The PE line even disconnection reminding device of the TN-S power supply system according to claim 2, characterized in that: the power cord (5) comprises a first live wire (L1), a second live wire (L2), a third live wire (L3), a working zero wire (N) and a protection zero wire (PE), one end of the light-emitting element (101) is connected with the first live wire (L1) or the second live wire (L2) or the third live wire (L3), and the other end of the light-emitting element (101) is connected with the protection zero wire (PE).

4. The PE line even disconnection reminding device of the TN-S power supply system according to claim 3, characterized in that: power module (2) electric connection has power cord (5), the one end of power module (2) is connected with first live wire (L1) or second live wire (L2) or third live wire (L3), the other end of power module (2) is connected with work zero line (N).

5. The PE line even disconnection reminding device of the TN-S power supply system according to claim 2, characterized in that: the light-emitting element (101) is a glass-packaged neon bulb, the starting voltage range of the neon bulb is 60V-90V, and the current density range of a cathode when the neon bulb emits light is 0.015-10 mA/cm ² 。

6. The PE line even disconnection reminding device of the TN-S power supply system according to claim 3, characterized in that: and a detection button (103) is connected between the light-emitting element (101) and the protection zero line (PE).

7. The PE line even disconnection reminding device of the TN-S power supply system according to claim 2, characterized in that: the light-emitting element (101) is connected with a current limiting resistor (104) in series, and the resistance value of the current limiting resistor (104) is 150k omega.

8. The PE line even disconnection reminding device of the TN-S power supply system according to claim 2, characterized in that: the power line (5) adopts an AC220V power line.

9. The PE line even disconnection reminding device of the TN-S power supply system according to claim 3, characterized in that: the power module (2) comprises a first resistor (R1), a second resistor (R2), a first capacitor (C1), a rectifier (201) and a first diode (D1), wherein the first resistor (R1) is connected with a first live wire (L1) or a second live wire (L2) or a third live wire (L3), the first resistor (R1) is connected with a second resistor (R2) in series, two ends of the first resistor (R1) are connected with a first capacitor (C1) in parallel, the input end of the rectifier (201) is connected to the second resistor (R2) and a working zero wire (N) respectively, and a first diode (D1) is connected between two output ends of the rectifier (201) in parallel.

10. The PE line even disconnection reminding device of the TN-S power supply system according to claim 9, characterized in that: the control switch module (3) comprises an NE555 chip (301), a second capacitor (C2), a third capacitor (C3), a third resistor (R3), a fourth resistor (R4), a fifth resistor (R5), a sixth resistor (R6) and a second diode (VD1), one end of the photoresistor (102) is connected to the second pin and the sixth pin of the NE555 chip (301) respectively, one output end of the rectifier (201) is connected with the third resistor (R3) in series, the third resistor (R3) is connected to the seventh pin of the NE555 chip (301), the other output end of the rectifier (201) is connected with the second capacitor (C2) in series, the second capacitor (C2) is connected to the other end of the photoresistor (102), the fourth resistor (R4) is connected between the other end of the photoresistor (102) and the seventh pin of the NE555 chip (301), and the fifth resistor (R5) and the sixth resistor (R6) are connected between the two output ends of the rectifier (201) in parallel ) The fifth resistor (R5) is connected with the sixth resistor (R6) in series, an output end of the rectifier (201) is connected to a fourth pin and an eighth pin of the NE555 chip (301) respectively, a third pin of the NE555 chip (301) is connected to one end of the audible and visual buzzer alarm (4), another output end of the rectifier (201) is connected to the other end of the first pin of the NE555 chip (301) and the other end of the audible and visual buzzer alarm (4) respectively, the fifth pin of the NE555 chip (301) is connected to the other end of the audible and visual buzzer alarm (4) through a third capacitor (C3), and a second diode (VD1) is connected between the third capacitor (C3) and the third pin of the NE555 chip (301) in parallel.