CN204992526U - Voltage protection circuit - Google Patents
Voltage protection circuit Download PDFInfo
- Publication number
- CN204992526U CN204992526U CN201520758345.3U CN201520758345U CN204992526U CN 204992526 U CN204992526 U CN 204992526U CN 201520758345 U CN201520758345 U CN 201520758345U CN 204992526 U CN204992526 U CN 204992526U
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- relay
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Abstract
The utility model discloses a voltage protection circuit, including resistance R6, electric capacity C6, relay J and chip IC1, electric capacity C6, transient voltage suppression diode DW, 220V alternating current and relay J's contact J -1 is connected to resistance R6's one end, and electric capacity C6's the other end and rectifier bridge T's port 1, relay J's contact J -1's other end connected load A is connected to resistance R6's the other end. The utility model discloses voltage protection circuit, circuit structure is simple, components and parts are few, uses potentiometre and resistance component voltage testing, can monitor the commercial power excessive pressure and the under -voltage circumstances, in case the excessive pressure appears and the electric loading power is used to under -voltage will the disconnection, reaches the mesh of protection circuit to still set up spike voltage suppression component in the circuit, increased the interference immunity of circuit, had consequently that the function is various, stable performance and a low advantage of cost of manufacture.
Description
Technical field
The utility model relates to a kind of protective circuit, specifically a kind of voltage protection circuit.
Background technology
thisin a little year, the electric utility of China is flourish, and most regional electricity consumption is all secure; but in remote mountain areas and west area; supply power voltage is still very unstable, and during peak, only 170V is upper and lower, again can more than 250V during the late into the night; in order to protect increasing household electrical appliance; configure an overvoltage protector or necessary, the most complex structure of voltage protector in the market, function singleness, and interference free performance is poor; easily be subject to the impact of peak voltage, therefore need to be improved.
Utility model content
The purpose of this utility model is to provide a kind of voltage protection circuit, to solve the problem proposed in above-mentioned background technology.
For achieving the above object, the utility model provides following technical scheme:
A kind of voltage protection circuit, comprises resistance R6, electric capacity C6, relay J and chip IC 1, one end of described resistance R6 connects electric capacity C6, transient voltage suppressor diode DW, the other end of the contact J-1 of 220V alternating current and relay J, resistance R6 connects the other end of electric capacity C6 and the port one of rectifier bridge T, and the other end of the contact J-1 of relay J connects load A, and the other end of load A connects the port 3 of rectifier bridge T, the other end of transient voltage suppressor diode DW and the other end of 220V alternating current, the port 2 of rectifier bridge T connects a stiff end of potentiometer RP1, the sliding end of potentiometer RP1, a stiff end of potentiometer RP2, the sliding end of potentiometer RP2, a stiff end of potentiometer RP3, the sliding end of potentiometer RP3, the pin 8 of electric capacity C1 and chip IC 1, another stiff end contact resistance R1 of potentiometer RP1 and the pin 6 of chip IC 1, another stiff end contact resistance R2 of potentiometer RP2 and the pin 2 of chip IC 1, another stiff end contact resistance R3 of potentiometer RP3 and the pin 4 of chip IC 1, the pin 3 of chip IC 1 connects electric capacity C3, the pin 4 of chip IC 2 and the pin 8 of chip IC 2, the other end of the pin 1 contact resistance R1 of chip IC 2, the other end of resistance R2, the other end of resistance R3, the other end of electric capacity C1, resistance R5, electric capacity C2, electric capacity C5, the anode of diode D2, relay J, the port 4 of rectifier bridge T, the pin 1 of chip IC 1 and the pin 1 of chip IC 2, the other end of the other end contact resistance R5 of electric capacity C3, the pin 2 of chip IC 2 and the pin 6 of chip IC 2, the pin 3 of chip IC 2 connects the negative electrode of diode D2 and the other end of relay J, and the model of described chip IC 1 and chip IC 2 is NE555.
As preferred version of the present utility model: described relay J is normally-closed contact relay.
Compared with prior art; the beneficial effects of the utility model are: the utility model voltage protection circuit circuit structure is simple, components and parts are few; potentiometer and resistance is used to form voltage detection module; can monitor mains supply over-voltage and undervoltage condition; once there is overvoltage and under-voltagely will disconnect electricity consumption load power source; reach the object of protective circuit; and be also provided with peak voltage suppression element in circuit; increase the anti-interference of circuit, therefore there is the advantage that diverse in function, stable performance and cost of manufacture are low.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of voltage protection circuit.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
Refer to Fig. 1, a kind of voltage protection circuit, comprise resistance R6, electric capacity C6, relay J and chip IC 1, one end of described resistance R6 connects electric capacity C6, transient voltage suppressor diode DW, the other end of the contact J-1 of 220V alternating current and relay J, resistance R6 connects the other end of electric capacity C6 and the port one of rectifier bridge T, and the other end of the contact J-1 of relay J connects load A, and the other end of load A connects the port 3 of rectifier bridge T, the other end of transient voltage suppressor diode DW and the other end of 220V alternating current, the port 2 of rectifier bridge T connects a stiff end of potentiometer RP1, the sliding end of potentiometer RP1, a stiff end of potentiometer RP2, the sliding end of potentiometer RP2, a stiff end of potentiometer RP3, the sliding end of potentiometer RP3, the pin 8 of electric capacity C1 and chip IC 1, another stiff end contact resistance R1 of potentiometer RP1 and the pin 6 of chip IC 1, another stiff end contact resistance R2 of potentiometer RP2 and the pin 2 of chip IC 1, another stiff end contact resistance R3 of potentiometer RP3 and the pin 4 of chip IC 1, the pin 3 of chip IC 1 connects electric capacity C3, the pin 4 of chip IC 2 and the pin 8 of chip IC 2, the other end of the pin 1 contact resistance R1 of chip IC 2, the other end of resistance R2, the other end of resistance R3, the other end of electric capacity C1, resistance R5, electric capacity C2, electric capacity C5, the anode of diode D2, relay J, the port 4 of rectifier bridge T, the pin 1 of chip IC 1 and the pin 1 of chip IC 2, the other end of the other end contact resistance R5 of electric capacity C3, the pin 2 of chip IC 2 and the pin 6 of chip IC 2, the pin 3 of chip IC 2 connects the negative electrode of diode D2 and the other end of relay J, and the model of described chip IC 1 and chip IC 2 is NE555.
Relay J is normally-closed contact relay.
Operation principle of the present utility model is: 220V line voltage enters the voltage reduction module be made up of resistance R6 and electric capacity C6 after eliminating peak voltage by transient voltage suppressor diode DW, voltage after step-down enters rectification in rectifier bridge T, electric capacity C1 is used for filtering, the 9V direct current of port 2 stable output of rectifier bridge T, chip IC 1 in circuit, resistance R1 ~ R2, potentiometer RP1 ~ RP2 forms overvoltage, undervoltage detection circuit, under-voltage critical value can be regulated respectively by potentiometer RP1 ~ RP2, overvoltage critical value and delay time, when line voltage is lower than under-voltage critical value or higher than overvoltage critical value, chip IC 1 is triggered, its 3 pin exports in low level, chip IC 2 is forced to reset, electric capacity C3 starts charging simultaneously, chip IC 2 exports high level, make relay J conducting, its normally-closed contact J-1 disconnects, by the dump of equipment, when overvoltage or undervoltage condition, while 3 pin of chip IC 1 are high level, because electric capacity C3 has time-lag action by resistance R5 charging, after the time delay of certain hour, 2 pin potentiometers of chip IC 2 are lower than set voltage, chip IC 2 is set, relay J adhesive, load A ON operation.
Claims (2)
1. a voltage protection circuit, comprises resistance R6, electric capacity C6, relay J and chip IC 1, is characterized in that, one end of described resistance R6 connects electric capacity C6, transient voltage suppressor diode DW, the other end of the contact J-1 of 220V alternating current and relay J, resistance R6 connects the other end of electric capacity C6 and the port one of rectifier bridge T, and the other end of the contact J-1 of relay J connects load A, and the other end of load A connects the port 3 of rectifier bridge T, the other end of transient voltage suppressor diode DW and the other end of 220V alternating current, the port 2 of rectifier bridge T connects a stiff end of potentiometer RP1, the sliding end of potentiometer RP1, a stiff end of potentiometer RP2, the sliding end of potentiometer RP2, a stiff end of potentiometer RP3, the sliding end of potentiometer RP3, the pin 8 of electric capacity C1 and chip IC 1, another stiff end contact resistance R1 of potentiometer RP1 and the pin 6 of chip IC 1, another stiff end contact resistance R2 of potentiometer RP2 and the pin 2 of chip IC 1, another stiff end contact resistance R3 of potentiometer RP3 and the pin 4 of chip IC 1, the pin 3 of chip IC 1 connects electric capacity C3, the pin 4 of chip IC 2 and the pin 8 of chip IC 2, the other end of the pin 1 contact resistance R1 of chip IC 2, the other end of resistance R2, the other end of resistance R3, the other end of electric capacity C1, resistance R5, electric capacity C2, electric capacity C5, the anode of diode D2, relay J, the port 4 of rectifier bridge T, the pin 1 of chip IC 1 and the pin 1 of chip IC 2, the other end of the other end contact resistance R5 of electric capacity C3, the pin 2 of chip IC 2 and the pin 6 of chip IC 2, the pin 3 of chip IC 2 connects the negative electrode of diode D2 and the other end of relay J, and the model of described chip IC 1 and chip IC 2 is NE555.
2. a kind of voltage protection circuit according to claim 1, is characterized in that, described relay J is normally-closed contact relay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520758345.3U CN204992526U (en) | 2015-09-29 | 2015-09-29 | Voltage protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520758345.3U CN204992526U (en) | 2015-09-29 | 2015-09-29 | Voltage protection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204992526U true CN204992526U (en) | 2016-01-20 |
Family
ID=55126855
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520758345.3U Expired - Fee Related CN204992526U (en) | 2015-09-29 | 2015-09-29 | Voltage protection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204992526U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106443502A (en) * | 2016-12-06 | 2017-02-22 | 江苏理工学院 | High-precision power supply ground floating port current detection and protection circuit |
-
2015
- 2015-09-29 CN CN201520758345.3U patent/CN204992526U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106443502A (en) * | 2016-12-06 | 2017-02-22 | 江苏理工学院 | High-precision power supply ground floating port current detection and protection circuit |
| CN106443502B (en) * | 2016-12-06 | 2019-02-15 | 江苏理工学院 | The current detecting and protection circuit of a kind of high-precision power floating ground port |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160120 Termination date: 20180929 |