CN204167867U - Line voltage alarm and protection circuit - Google Patents
Line voltage alarm and protection circuit Download PDFInfo
- Publication number
- CN204167867U CN204167867U CN201420612746.3U CN201420612746U CN204167867U CN 204167867 U CN204167867 U CN 204167867U CN 201420612746 U CN201420612746 U CN 201420612746U CN 204167867 U CN204167867 U CN 204167867U
- Authority
- CN
- China
- Prior art keywords
- inverter
- circuit
- positive pole
- connects
- tuning
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
The utility model discloses a kind of line voltage alarm and protection circuit; comprise relay; the normally closed switch J of relay and load in series; the coil P of relay and triode T forms protective circuit after connecting; the two ends of protective circuit connect live wire and the zero line of civil power respectively; also be provided with a testing circuit between the base stage of civil power live wire and triode T, between the first described Circuit tuning and zero line, be provided with a warning circuit.The beneficial effects of the utility model are: when overvoltage and under voltage appear in line voltage, cut off load power source, protection load, and carry out sound and light alarm.
Description
Technical field
The utility model relates to voltage detecting field, particularly relates to a kind of line voltage alarm and protection circuit.
Background technology
In existing a lot of community, enterprise, or often occur the phenomenon of line voltage shakiness, often cause electrical equipment to occur damaging, cause very large loss, this is also the thing of power supply department headache.
Utility model content
Namely the purpose of this utility model is the deficiency overcoming present technology, provides a kind of line voltage alarm and protection circuit, solves existing line voltage unstable, causes load to occur the problem damaged.
The utility model is achieved through the following technical solutions: line voltage alarm and protection circuit, comprise relay, the normally closed switch J of relay and load in series, the coil P of relay and triode T forms protective circuit after connecting, the two ends of protective circuit connect live wire and the zero line of civil power respectively, also be provided with first Circuit tuning between civil power live wire and protective circuit, the first Circuit tuning comprises decompression capacitor C3 and rectifier diode D6;
A testing circuit is also provided with between the base stage of civil power live wire and triode T, the second Circuit tuning is provided with between testing circuit and civil power live wire, second Circuit tuning comprises commutation capacitor D1 and dropping resistor R1, and testing circuit comprised pressure testing circuit in parallel and undervoltage detection circuit;
Over-voltage detection circuit comprises the first inverter M1, the second inverter M2 and the first photodiode DA, the negative pole of the first inverter M1 connects the positive pole of the second inverter M2, the negative pole of the second inverter connects the base stage of triode T through diode D2, the positive pole of the first inverter connects the second Circuit tuning through rheostat RP1, the positive pole of the first photodiode DA is connected to the output of the first Circuit tuning, and negative pole is connected to the junction of the first inverter M1, the second inverter M2;
Undervoltage detection circuit comprises the 3rd inverter M3 and the second photodiode DB, the positive pole of the 3rd described inverter M3 connects the second Circuit tuning through rheostat RP2, its negative pole connects the base stage of triode T through diode D3, second light-emitting diode DB positive pole connects the negative pole of the 3rd inverter M3, its minus earth.
A warning circuit is provided with between the first described Circuit tuning and zero line, described warning circuit comprises the 4th inverter M4 and tonepulse oscillator, the positive pole of the 4th inverter M4 is connected to the first Circuit tuning, negative pole is connected to tonepulse oscillator, tonepulse oscillator comprises the 5th inverter M5 of series connection, hex inverter M6 and piezoelectric ceramic piece Y, the positive pole of the 5th described inverter M5 connects the 4th inverter M4 through diode D5, negative pole is connected to hex inverter M6, the negative pole of hex inverter M6 is connected to piezoelectric ceramic piece Y, piezoelectric ceramic piece Y and ground connection, the positive pole of diode D5 connects the 5th inverter M5, the positive pole of the 5th described inverter M5 is also connected to the positive pole of hex inverter M6 through resistance R5, the positive pole of the 5th inverter M5 is also connected to the negative pole of hex inverter M6 through electric capacity C4.
In this device, civil power is a point two-way, one tunnel is to the first Circuit tuning, another road is to the second Circuit tuning, the first via is through C3 step-down, D6 rectification, export a low-voltage dc voltage, mainly output to coil P, coil P connects with triode T, coil P is wanted to be energized, namely triode T is needed to open, the base stage of triode T obtains electric rear unlatching, this mainly testing circuit control, namely another road of civil power is through D1 rectification, R1 step-down, output to testing circuit, in testing circuit, the positive terminal voltage of the first inverter and the 3rd inverter, the voltage on rheostat RP1 and rheostat RP2 respectively, when in this device, civil power is stablized, the output of the first inverter is high level, the output of the second inverter M2 is low level.And the output of the 3rd inverter M3 is low level, the cut-in voltage of main first inverter is comparatively large, and the cut-in voltage of the 3rd inverter is less, and triode turns off, coil P is power-off, normally closed switch J normally closed, light-emitting diode DA also ends not luminous, and the 4th inverter output low level, D5 and conducting, low level inputs from the positive pole of the 5th inverter M5, and make the tonepulse blocking of oscillator, Y is sounding not; When overvoltage appears in civil power, the first inverter exports negative level, and the second inverter exports as high level, and the 3rd inverter exports or low level, at this moment transistor base invocation point, triode is opened, and coil P obtains electric, thus breaking normally closed switch J, light-emitting diode DA then conducting is luminous, achieves alarm; When line voltage occurs under-voltage, the first inverter exports high level, the second inverter output low level, 3rd inverter exports high level, makes again triode T base stage obtain electric, thus makes coil P conducting, switching off load, at this moment light-emitting diode DB conducting is luminous, achieves alarm.When triode T opens, make the 4th inverter export high level, diode D5 ends, and tonepulse oscillator is opened, Y sounding.
Further, the first above-mentioned Circuit tuning also comprises filter circuit and electric capacity of voltage regulation DW, filter circuit comprises electric capacity C2 and diode D7, filter circuit is exactly the residual waves AC of filtering, ensure to export direct current, electric capacity of voltage regulation DW major stable voltage, excessive so as not to light-emitting diode DA positive pole place voltage, make light-emitting diode DA luminous.
Further, the second above-mentioned Circuit tuning also comprises filter capacitor C1, the waves AC that filtering is residual.
The beneficial effects of the utility model are: when overvoltage and under voltage appear in line voltage, cut off load power source, protection load, and carry out sound and light alarm.
Accompanying drawing explanation
Fig. 1 is the structural representation of embodiment.
Embodiment
Below in conjunction with embodiment, the utility model is described in further detail, but structure of the present utility model is not limited only to following examples:
[embodiment]
As shown in Figure 1, line voltage alarm and protection circuit, comprise relay, the normally closed switch J of relay connects with load G, the coil P of relay and triode T forms protective circuit after connecting, the two ends of protective circuit connect live wire and the zero line of civil power respectively, are also provided with first Circuit tuning between civil power live wire and protective circuit, and the first Circuit tuning comprises decompression capacitor C3 and rectifier diode D6;
A testing circuit is also provided with between the base stage of civil power live wire and triode T, the second Circuit tuning is provided with between testing circuit and civil power live wire, second Circuit tuning comprises commutation capacitor D1 and dropping resistor R1, and testing circuit comprised pressure testing circuit in parallel and undervoltage detection circuit;
Over-voltage detection circuit comprises the first inverter M1, the second inverter M2 and the first photodiode DA, the negative pole of the first inverter M1 connects the positive pole of the second inverter M2, the negative pole of the second inverter connects the base stage of triode T through diode D2, the positive pole of the first inverter connects the second Circuit tuning through rheostat RP1, the positive pole of the first photodiode DA is connected to the output of the first Circuit tuning, and negative pole is connected to the junction of the first inverter M1, the second inverter M2;
Undervoltage detection circuit comprises the 3rd inverter M3 and the second photodiode DB, the positive pole of the 3rd described inverter M3 connects the second Circuit tuning through rheostat RP2, its negative pole connects the base stage of triode T through diode D3, second light-emitting diode DB positive pole connects the negative pole of the 3rd inverter M3, its minus earth.
A warning circuit is provided with between the first described Circuit tuning and zero line, described warning circuit comprises the 4th inverter M4 and tonepulse oscillator, the positive pole of the 4th inverter M4 is connected to the first Circuit tuning, negative pole is connected to tonepulse oscillator, tonepulse oscillator comprises the 5th inverter M5 of series connection, hex inverter M6 and piezoelectric ceramic piece Y, the positive pole of the 5th described inverter M5 connects the 4th inverter M4 through diode D5, negative pole is connected to hex inverter M6, the negative pole of hex inverter M6 is connected to piezoelectric ceramic piece Y, piezoelectric ceramic piece Y and ground connection, the positive pole of diode D5 connects the 5th inverter M5, the positive pole of the 5th described inverter M5 is also connected to the positive pole of hex inverter M6 through resistance R5, the positive pole of the 5th inverter M5 is also connected to the negative pole of hex inverter M6 through electric capacity C4.
In this device, civil power is a point two-way, one tunnel is to the first Circuit tuning, another road is to the second Circuit tuning, the first via is through C3 step-down, D6 rectification, export a low-voltage dc voltage, mainly output to coil P, coil P connects with triode T, coil P is wanted to be energized, namely triode T is needed to open, the base stage of triode T obtains electric rear unlatching, this mainly testing circuit control, namely another road of civil power is through D1 rectification, R1 step-down, output to testing circuit, in testing circuit, the positive terminal voltage of the first inverter and the 3rd inverter, the voltage on rheostat RP1 and rheostat RP2 respectively, when in this device, civil power is stablized, the output of the first inverter is high level, the output of the second inverter M2 is low level.And the output of the 3rd inverter M3 is low level, the cut-in voltage of main first inverter is comparatively large, and the cut-in voltage of the 3rd inverter is less, and triode turns off, coil P is power-off, normally closed switch J normally closed, light-emitting diode DA also ends not luminous, and the 4th inverter output low level, D5 and conducting, low level inputs from the positive pole of the 5th inverter M5, and make the tonepulse blocking of oscillator, Y is sounding not; When overvoltage appears in civil power, the first inverter exports negative level, and the second inverter exports as high level, and the 3rd inverter exports or low level, at this moment transistor base invocation point, triode is opened, and coil P obtains electric, thus breaking normally closed switch J, light-emitting diode DA then conducting is luminous, achieves alarm; When line voltage occurs under-voltage, the first inverter exports high level, the second inverter output low level, 3rd inverter exports high level, makes again triode T base stage obtain electric, thus makes coil P conducting, switching off load, at this moment light-emitting diode DB conducting is luminous, achieves alarm.When triode T opens, make the 4th inverter export high level, diode D5 ends, and tonepulse oscillator is opened, Y sounding.
Further, the first above-mentioned Circuit tuning also comprises filter circuit and electric capacity of voltage regulation DW, filter circuit comprises electric capacity C2 and diode D7, filter circuit is exactly the residual waves AC of filtering, ensure to export direct current, electric capacity of voltage regulation DW major stable voltage, excessive so as not to light-emitting diode DA positive pole place voltage, make light-emitting diode DA luminous.
Further, the second above-mentioned Circuit tuning also comprises filter capacitor C1, the waves AC that filtering is residual.
Claims (3)
1. line voltage alarm and protection circuit, it is characterized in that: comprise relay, the normally closed switch J of relay and load in series, the coil P of relay and triode T forms protective circuit after connecting, the two ends of protective circuit connect live wire and the zero line of civil power respectively, also be provided with first Circuit tuning between civil power live wire and protective circuit, the first Circuit tuning comprises decompression capacitor C3 and rectifier diode D6;
A testing circuit is also provided with between the base stage of civil power live wire and triode T, the second Circuit tuning is provided with between testing circuit and civil power live wire, second Circuit tuning comprises commutation capacitor D1 and dropping resistor R1, and testing circuit comprised pressure testing circuit in parallel and undervoltage detection circuit;
Over-voltage detection circuit comprises the first inverter M1, the second inverter M2 and the first photodiode DA, the negative pole of the first inverter M1 connects the positive pole of the second inverter M2, the negative pole of the second inverter connects the base stage of triode T through diode D2, the positive pole of the first inverter connects the second Circuit tuning through rheostat RP1, the positive pole of the first photodiode DA is connected to the output of the first Circuit tuning, and negative pole is connected to the junction of the first inverter M1, the second inverter M2;
Undervoltage detection circuit comprises the 3rd inverter M3 and the second photodiode DB, the positive pole of the 3rd described inverter M3 connects the second Circuit tuning through rheostat RP2, its negative pole connects the base stage of triode T through diode D3, second light-emitting diode DB positive pole connects the negative pole of the 3rd inverter M3, its minus earth;
A warning circuit is provided with between the first described Circuit tuning and zero line, described warning circuit comprises the 4th inverter M4 and tonepulse oscillator, the positive pole of the 4th inverter M4 is connected to the first Circuit tuning, negative pole is connected to tonepulse oscillator, tonepulse oscillator comprises the 5th inverter M5 of series connection, hex inverter M6 and piezoelectric ceramic piece Y, the positive pole of the 5th described inverter M5 connects the 4th inverter M4 through diode D5, negative pole is connected to hex inverter M6, the negative pole of hex inverter M6 is connected to piezoelectric ceramic piece Y, piezoelectric ceramic piece Y and ground connection, the positive pole of diode D5 connects the 5th inverter M5, the positive pole of the 5th described inverter M5 is also connected to the positive pole of hex inverter M6 through resistance R5, the positive pole of the 5th inverter M5 is also connected to the negative pole of hex inverter M6 through electric capacity C4.
2. line voltage alarm and protection circuit according to claim 1, it is characterized in that: the first described Circuit tuning also comprises filter circuit and electric capacity of voltage regulation DW, filter circuit comprises electric capacity C2 and diode D7.
3. line voltage alarm and protection circuit according to claim 1, is characterized in that: the second described Circuit tuning also comprises filter capacitor C1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420612746.3U CN204167867U (en) | 2014-10-22 | 2014-10-22 | Line voltage alarm and protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420612746.3U CN204167867U (en) | 2014-10-22 | 2014-10-22 | Line voltage alarm and protection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204167867U true CN204167867U (en) | 2015-02-18 |
Family
ID=52541518
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420612746.3U Expired - Fee Related CN204167867U (en) | 2014-10-22 | 2014-10-22 | Line voltage alarm and protection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204167867U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104283184A (en) * | 2014-10-22 | 2015-01-14 | 四川蓝讯宝迩电子科技有限公司 | Electric supply overvoltage and undervoltage warning protection circuit |
-
2014
- 2014-10-22 CN CN201420612746.3U patent/CN204167867U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104283184A (en) * | 2014-10-22 | 2015-01-14 | 四川蓝讯宝迩电子科技有限公司 | Electric supply overvoltage and undervoltage warning protection circuit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204407858U (en) | A kind of overvoltage crowbar | |
| CN103022978B (en) | For the over under-voltage protection circuit of multiple pulse rectification circuit | |
| CN205070392U (en) | Smart jack controller | |
| CN205319797U (en) | Industrial automation produces monitored control system | |
| CN203377777U (en) | A soft start circuit of an auxiliary power supply | |
| CN205509491U (en) | DC power supply prevents reverse -connection protective circuit | |
| CN204423222U (en) | A kind of D.C. regulated power supply current foldback circuit | |
| CN203491680U (en) | Automatic reset electric leakage overvoltage/undervoltage protection circuit | |
| CN204167867U (en) | Line voltage alarm and protection circuit | |
| CN200969510Y (en) | Minisize intelligent electricity protector | |
| CN204205548U (en) | Circuit overcurrent protection | |
| CN204376381U (en) | For the overvoltage crowbar of LED high-voltage light bar | |
| CN204068197U (en) | The under-voltage overvoltage automatic protection circuit of a kind of civil power | |
| CN104076192A (en) | Lamp drive under voltage alarm circuit | |
| CN204167866U (en) | The two-way out-of-limit detection protective circuit of line voltage | |
| CN103401215B (en) | A kind of over-and under-voltage protection circuit, protection socket and terminal | |
| CN202918037U (en) | Electric bicycle charger | |
| CN203339670U (en) | Three-phase star type motor open-phase protector | |
| CN205960779U (en) | P type monitoring formula switching power | |
| CN201188536Y (en) | Protector for over voltage, undervoltage and lack phase of power supply | |
| CN204347107U (en) | The electronic controller of New type of current sample circuit and isolating switch | |
| CN203631410U (en) | Vacuum circuit breaker controlling circuit and vacuum circuit breaker controlling system | |
| CN203932956U (en) | A kind of high-current relay Drive Protecting Circuit | |
| CN104283184A (en) | Electric supply overvoltage and undervoltage warning protection circuit | |
| CN209088574U (en) | A kind of internal/external power switching circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150218 Termination date: 20151022 |
|
| EXPY | Termination of patent right or utility model |