CN104577947A - Overvoltage and undervoltage protection device with function of displaying overvoltage or undervoltage - Google Patents
Overvoltage and undervoltage protection device with function of displaying overvoltage or undervoltage Download PDFInfo
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- CN104577947A CN104577947A CN201310494084.4A CN201310494084A CN104577947A CN 104577947 A CN104577947 A CN 104577947A CN 201310494084 A CN201310494084 A CN 201310494084A CN 104577947 A CN104577947 A CN 104577947A
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Abstract
The invention provides an overvoltage and undervoltage protection device with a function of displaying overvoltage or undervoltage. The overvoltage and undervoltage protection device comprises a power supply circuit, an overvoltage detecting unit, an undervoltage detecting unit, an overvoltage display unit, an undervoltage display unit, an or gate output unit, a delay output unit and a power switch unit. When an overvoltage or undervoltage condition is detected by the device, controllable silicon is triggered to be conducted, and then a power supply is cut off to realize the effect of protecting electronic equipment; users can timely know a grid state and grid power supply quality through the overvoltage display unit and the undervoltage display unit, so that a remarkable progressive significance is realized.
Description
Technical field
The present invention relates to power protection field of switches, particularly relate to and a kind ofly judge overvoltage or under-voltage overvoltage and under-voltage protective device.
Background technology
Along with improving constantly of people's quality of life; electronics, electric equipment products enter huge numbers of families; the protection person is also progressively being strengthened with the awareness of safety of equipment; the function of the electronic product particularly used now is more and more important; the field of electronic product application is also more and more important; also more and more important to the protection of equipment, the requirement of protector of all kinds is also improved constantly simultaneously.
Current circuit brake is widely used; by circuit brake disposed therein; can effectively avoid high pressure or low pressure on the impact of circuit; there is the protective device simultaneously having overvoltage and under-voltage protection in the market; but it is overvoltage or under-voltage that such device can not show line voltage, cannot understand the supply power voltage situation of electrical network.
Summary of the invention
The object of the invention is; the defect existed for above-mentioned prior art provides a kind ofly has display overvoltage or under-voltage overvoltage and undervoltage protection device; achieve and can be detected voltage and also can detect under-voltage protection, and show overvoltage or the under-voltage condition of voltage.
Technical scheme of the present invention is as follows: a kind of have display overvoltage or under-voltage overvoltage and undervoltage protection device, it is characterized in that, comprising: power circuit, for providing power supply and reference voltage to detecting unit; Described detecting unit comprises overvoltage detecting unit and under-voltage detecting unit, exports high level signal after the voltage level for inputting described power circuit judges; Also comprise the overvoltage display unit be connected with described overvoltage detecting unit, the under-voltage display unit be connected with under-voltage detecting unit; Respectively with overvoltage display translation unit and be connected with under-voltage display translation unit or door output unit, time delay output unit and power switch unit; described or door output unit; for receiving described high level signal and being transferred to described time delay output unit; export described high level signal to power switch unit after carrying out charging time delay by described time delay output unit, realize cutting off protected circuit power supply by described power switch unit.
Beneficial effect of the present invention is: owing to have employed above-mentioned technical solution; make this product detect overvoltage or under-voltage time; by triggering controlled silicon conducting; cut off the electricity supply and reach the effect of protection power consumption equipment; by overvoltage display unit and under-voltage display unit; user can understand grid condition in time, understands grid supply quality in time, has significant progressive meaning.
Accompanying drawing explanation
Fig. 1 is circuit diagram of the present invention.
Embodiment
Shown in composition graphs 1, the present invention includes: power circuit 100, overvoltage detecting unit 200, under-voltage detecting unit 300, or door output unit 400, time delay output unit 500, power switch unit 600, overvoltage display unit 700, under-voltage display unit 800, wherein:
Power circuit 100 is connected with under-voltage detecting unit 300 with overvoltage detecting unit 200 respectively, for powering to overvoltage detecting unit and under-voltage detecting unit, and provides reference voltage to detecting unit or door output unit and time delay output unit;
Overvoltage detecting unit 200, voltage level for inputting power circuit 100 judges, detect its overvoltage signal, when the magnitude of voltage of the voltage detected higher than GB defined time, overvoltage detecting unit 200 will export high level signal, overvoltage detecting unit 200 comprises amplifier A1 and diode D2 herein, its positive input is by the resistance (R4 of four series connection, R5, R6, R7) the VA end of power circuit 100 is connect, amplifier A1 negative input connects the VB end of power circuit 100, VB is reference level, the output of amplifier A1 takes over pressure display unit 700 positive pole, overvoltage display unit 700 negative pole connects the positive pole of diode D2, the negative pole of diode D2 connects amplifier A3 positive input that is described or door output unit by resistance R10,
Under-voltage detecting unit 300, judge for the voltage level inputted power circuit 100 equally, detect its brownout signal, when the voltage signal detected is less than the numerical value of national regulations time, under-voltage detecting unit 300 also exports high level signal, under-voltage detecting unit comprises amplifier A2 and diode D3 herein, its positive input and amplifier A1 negative input meet VB end (reference voltage) of power circuit 100 equally respectively, amplifier A2 negative input is by resistance R4, R5 and R6 connects the VA end of power circuit 100, output termination under-voltage display unit 800 positive pole of amplifier A2, under-voltage display unit 800 negative pole connects the positive pole of diode D3, the negative pole of diode D3 connects amplifier A3 positive input that is described or door output unit by resistance R10,
Its operation principle is as follows: by power input (L, N hold) alternating voltage after bridge rectifier D1 rectification, after R1, R2 two resistance step-downs, through voltage-stabiliser tube VD1, obtain the flat VCC of galvanic current after filter capacitor C1, this voltage VCC is respectively used to provide power supply to circuit, and DC level VCC is again through R3 step-down, a DC level VB is obtained by VD2 voltage stabilizing, DC level VB is used for providing reference level to four amplifiers (A1, A2, A3 and A4) respectively, and power input (L, N hold) alternating voltage after bridge rectifier D1 rectification, obtain a direct voltage VA, for being connected to overvoltage detecting unit A1 and under-voltage test section A2, when the supply voltage coming from power circuit 100 raises time, voltage VA after rectification also raises, the level of the positive input of overvoltage detecting unit A1 is caused to raise, when this level increases above the reference level VB of its negative input, overvoltage detecting unit A1 just exports high level to overvoltage display unit, overvoltage display unit display overvoltage alarm, high voltage is by after overvoltage display unit, the positive input of access amplifier A3, make the voltage of the positive input of amplifier A3 higher than the reference level VB of negative input, same under-voltage detecting unit A2 is identical with overvoltage detecting unit A1 principle, also be to under-voltage display unit by high level output, under-voltage display unit shows under-voltage alarm, high voltage is by after under-voltage display unit, the positive input of access amplifier A3, as power input (L, N hold) alternating voltage lower than certain national regulations value time, input to the negative input of under-voltage detecting unit A2, now the sampled level of this end will reduce, when the positive input reference level VB of this level lower than under-voltage detecting unit A2 time, under-voltage detecting unit A2 will export the A3 of high level extremely or in door output unit.When any road of overvoltage detecting unit A1 or under-voltage detecting unit A2 exports high level, or the A3 of door output unit just exports high level, this makes it possible to realize overvoltage or under-voltage measuring ability, or door output unit A3 is connected with time delay output unit, when or door output unit A3 export for high level time, come from the VCC level of power circuit by resistance R12, electric capacity C5 realizes charging delay function, after electric capacity C5 is by charging, the level of the positive input of the amplifier A4 in time delay output unit is higher than its negative input level VB, amplifier A4 exports high level.
Claims (1)
1. there is display overvoltage or under-voltage overvoltage and a undervoltage protection device, it is characterized in that, comprising: power circuit, for providing power supply and reference voltage to detecting unit; Described detecting unit comprises overvoltage detecting unit and under-voltage detecting unit, exports high level signal after the voltage level for inputting described power circuit judges; Also comprise the overvoltage display unit be connected with described overvoltage detecting unit, the under-voltage display unit be connected with under-voltage detecting unit; Respectively with overvoltage display translation unit and be connected with under-voltage display translation unit or door output unit, time delay output unit and power switch unit; described overvoltage display unit is for showing overvoltage alarm; described under-voltage display unit is for showing under-voltage alarm; described or door output unit is for receiving described high level signal and being transferred to described time delay output unit; export described high level signal to power switch unit after carrying out charging time delay by described time delay output unit, realize cutting off protected circuit power supply by described power switch unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310494084.4A CN104577947A (en) | 2013-10-21 | 2013-10-21 | Overvoltage and undervoltage protection device with function of displaying overvoltage or undervoltage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310494084.4A CN104577947A (en) | 2013-10-21 | 2013-10-21 | Overvoltage and undervoltage protection device with function of displaying overvoltage or undervoltage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104577947A true CN104577947A (en) | 2015-04-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310494084.4A Pending CN104577947A (en) | 2013-10-21 | 2013-10-21 | Overvoltage and undervoltage protection device with function of displaying overvoltage or undervoltage |
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| CN (1) | CN104577947A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107257596A (en) * | 2017-07-14 | 2017-10-17 | 安徽亮亮电子科技有限公司 | A kind of LED emergency lighting controller ables |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201584745U (en) * | 2009-12-21 | 2010-09-15 | 无锡华阳科技有限公司 | Overvoltage and undervoltage protection device with function of time delay |
| CN102761095A (en) * | 2011-04-28 | 2012-10-31 | 西门子公司 | Device and method for undervoltage-overvoltage protection |
| CN202696125U (en) * | 2012-07-03 | 2013-01-23 | Tcl通力电子（惠州）有限公司 | Overvoltage and undervoltage protection circuit and electronic equipment |
| CN202772549U (en) * | 2012-07-19 | 2013-03-06 | 浙江泰华电器有限公司 | Protector integrated with open phase protection, phase sequence protection and overvoltage/undervoltage protections |
| CN203071557U (en) * | 2012-12-12 | 2013-07-17 | 滑县电业管理公司 | Distribution transformer overvoltage/undervoltage protector |
-
2013
- 2013-10-21 CN CN201310494084.4A patent/CN104577947A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201584745U (en) * | 2009-12-21 | 2010-09-15 | 无锡华阳科技有限公司 | Overvoltage and undervoltage protection device with function of time delay |
| CN102761095A (en) * | 2011-04-28 | 2012-10-31 | 西门子公司 | Device and method for undervoltage-overvoltage protection |
| CN202696125U (en) * | 2012-07-03 | 2013-01-23 | Tcl通力电子（惠州）有限公司 | Overvoltage and undervoltage protection circuit and electronic equipment |
| CN202772549U (en) * | 2012-07-19 | 2013-03-06 | 浙江泰华电器有限公司 | Protector integrated with open phase protection, phase sequence protection and overvoltage/undervoltage protections |
| CN203071557U (en) * | 2012-12-12 | 2013-07-17 | 滑县电业管理公司 | Distribution transformer overvoltage/undervoltage protector |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107257596A (en) * | 2017-07-14 | 2017-10-17 | 安徽亮亮电子科技有限公司 | A kind of LED emergency lighting controller ables |
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Application publication date: 20150429 |