CN201048287Y - Overvoltage protector with acousto-optic early warning and exterior extension interface circuit - Google Patents
Overvoltage protector with acousto-optic early warning and exterior extension interface circuit Download PDFInfo
- Publication number
- CN201048287Y CN201048287Y CNU200720070747XU CN200720070747U CN201048287Y CN 201048287 Y CN201048287 Y CN 201048287Y CN U200720070747X U CNU200720070747X U CN U200720070747XU CN 200720070747 U CN200720070747 U CN 200720070747U CN 201048287 Y CN201048287 Y CN 201048287Y
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- circuit
- acousto
- early warning
- overvoltage protection
- expansion interface
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Abstract
The utility model discloses an overvoltage protection device of a circuit with acousto-optic prewarning and an external expanding interface. The utility model is characterized in that the device comprises a shell, a benign current-conducting plate arranged in the shell, a convex wave absorber which is connected with the benign current-conducting plate, and an electric induction coil connected with the convex wave absorber. The utility model has reasonable structure and artful design, and provides acousto-optic prewarning signals for the overvoltage protection device, at the same time, utilizing the expanding interface, the utility model can be conveniently connected with a PLC, a signal collector and the computer automation equipment, thereby realizing the functions of unattended operation, automatic record of action times, extent of protection and protection frequency, etc, improving the application range of the overvoltage protection device, and having greatly value for popularization.
Description
Technical field
The utility model relates to the over-pressure safety device technical field, specifically, relates to a kind of over-pressure safety device that overvoltage is carried out acousto-optic early warning and external expansion interface.
Background technology
At present in the two-wire system or three-phase of convertor assembly, DC side and energized circuit, often because protective device component wear or decreased performance and fault-free feedback information, thereby the phenomenon that is short-circuited jeopardizes safety, therefore must implement to continue monitoring to protective device.Existing overvoltage protection field; technology is comparative maturity; but mostly be the simple function of pursuing overvoltage protection unilaterally; whether overvoltage protection is in action; the number of times of action and the moment all can't give clearer and more definite indication; bring many inconvenience to user's use, and can not make measures areput to fault-signal timely and accurately.
Summary of the invention
The purpose of this utility model is, provides a kind of and can effectively overcome above-mentioned defective, has the overvoltage protection of acousto-optic early warning and external expansion interface circuit.
For achieving the above object, the utility model adopts following technical scheme: the wiring pile J1 that is the surge absorber two ends of special non-linear relation with voltage and electric current; The string 220K of J2 place resistance R 1 current limliting, 4 diode series connection back filter rectifications (D2, D3, D4, D5), the voltage stabilizing of DW1 diode, vast capacity capacitor C 1 filtering accumulator provides 5V direct-current power supply other parts to use.
The current path of inductance coil L1 and overvoltage protection is formed a current transformer, and the operating current I of overvoltage protection is delivered to 3 pin of amplifier LM324 with the input saturation circuit of L1, C2, DW2, DW3 composition.1,2,3 pin of LM324 are formed together proportional amplifier mutually with external R2 resistance.Signal voltage is amplified this amplifier after the integrator delay-time circuit of D1, R3, R4, C3 composition is delivered to 5 pin of LM324.5,6,7 pin of LM324 and outside adjustable resistance R5, R6 form the adjustable voltage comparator of datum mark.When 5 pin voltages were higher than 6 pin, 7 pin were exported a high level, imported the amplifying circuit of 8,9, the 10 pin composition of LM324 again through 10 pin of LM324.Strong signal after will being amplified by 8 pin removes to promote buzzer and sends chimes of doom.This high level signal is delivered to the amplifying circuit of being made up of 12,13,14 pin of LM324 simultaneously.Signal is by the 12 pin input of LM324,14 pin output signals.Send light signal through resistance R 7, LED1 and photoelectric coupling circuit OP1, the prompting people note.Photoelectric coupling also moves simultaneously, this actuating signal is delivered to other instrumentations that are connected on the external expansion interface.
Owing to adopt such scheme, be not difficult to draw as drawing a conclusion: the utility model is rational in infrastructure, be skillfully constructed, for overvoltage protection provides the acousto-optic early warning signal, utilize its expansion interface simultaneously, can be easily and PLC, signal picker and computer automation equipment link to each other, realization equipment unattended operation, automatically operation of recording number of times, protection range, protection frequency etc., improved the scope of application of overvoltage protection; Has promotional value.
Description of drawings
Below in conjunction with drawings and Examples the utility model is described in further detail.
Accompanying drawing 1 is the utility model structure sectional view;
Accompanying drawing 3, Fig. 4 are the utility model circuit theory diagrams;
The circuit diagram of second case study on implementation during accompanying drawing 5;
The circuit diagram of the 3rd case study on implementation during accompanying drawing 6.
Embodiment
Referring to accompanying drawing one, a kind of over-pressure safety device that has the acousto-optic early warning, external expansion interface is provided, comprise shell 1 and the optimum conductive plate 2 that places shell, the surge absorber 3 that links to each other with described optimum conductive plate 2, the inductance coil 4 that links to each other with described surge absorber 3.Early warning circuit and signal expansion circuit 5 are equipped with in described inductance coil 4 upper ends, and acousto-optic early warning 6 and signal extension interface 7 are housed on the shell 1.
Referring to accompanying drawing two, the surge current input that produces when comprising overvoltage protection to action in protected device line detects the inductance coil circuit; be used for circuit with the current signal amplification of testing circuit output; the charging delay circuit that is connected with the output of described amplifying circuit; the comparison circuit that is connected with the output of described charging delay circuit; the acousto-optic early warning circuit that is connected with the output of described comparison circuit; the external expansion interface circuit that is connected with the output of described comparison circuit; with the circuit that power supply device is provided in the above-mentioned described circuit.
Referring to accompanying drawing three, amplify, relatively amplify and output unit is formed by induction of signal, signal.
Induction of signal: after sensing signal by induction coil L1,, and, faint signal can be carried out high power and amplify, obtain a higher signal with sending into the front-end amplifier of forming by the LM324 amplifier behind two two-sided 5V voltage stabilizing amplitude limits through the C2 capacitive coupling.
Relatively amplify: 1 pin by LM324 closes the signal of transmission through D1, R4, R3 lotus root, enters the comparator of being made up of 5,6,7 tripods of amplifier LM324.This part can realize the initial control level adjusting, starts to control a little thereby can improve.
Output unit: this part and two parts are formed: 1 voice output, form an output amplifier with 8,9,10 pin of LM324, and by the loud speaker signal of sounding.2 light are reported to the police and the external circuits interface, form another output amplifier, resistance, photoelectricity coupling and Light-Emitting Diode output light signal and external signal interface with 12,13,14 pin of LM324.
Referring to accompanying drawing four, this device is for DC power supply, and five IN4007 diodes are connected, and by obtaining after 220 kilo-ohms of current-limiting resistance dividing potential drops.For assurance obtains the stability of voltage, and according to the power consumption of this circuit arrangement, adopted electric resistance partial pressure and with a voltage stabilizing didoe voltage stabilizing.Obtain the single-ended direct current of 5V behind the 1F vast capacity capacitor filtering.Voltage is powered to complete machine thus.
Referring to accompanying drawing five, six, describedly can adopt a plurality of surge absorbers (VDR) series parallel circuits schematic diagram when being used for protecting the higher circuit of impulse withstand voltage.
Claims (6)
1. overvoltage protection with acousto-optic early warning and external expansion interface circuit is characterized in that shell and the optimum conductive plate that places shell, the surge absorber that links to each other with described optimum conductive plate, the inductance coil that links to each other with described surge absorber.
2. the overvoltage protection with acousto-optic early warning and external expansion interface circuit as claimed in claim 1 is characterized in that: early warning circuit and signal expansion circuit are equipped with in described inductance coil upper end.
3. the overvoltage protection with acousto-optic early warning and external expansion interface circuit as claimed in claim 1 is characterized in that: acousto-optic early warning and signal extension interface are housed on the shell.
4. the overvoltage protection with acousto-optic early warning and external expansion interface circuit as claimed in claim 1 is characterized in that: two ends wiring pile J1, the J2 of surge absorber and the circuit in the protected equipment are in parallel: can adopt a plurality of surge absorbers (VDR) serial or parallel connection when being used for protecting the higher circuit of impulse withstand voltage.
5. as claim 1,2,3 described overvoltage protections with acousto-optic early warning and external expansion interface circuit, it is characterized in that: described acousto-optic precaution device, external expansion interface early warning circuit and signal expansion circuit comprise amplifying circuit, charging delay circuit, comparison circuit, acousto-optic early warning circuit, external expansion interface circuit and the circuit that power supply device is provided.
6. the overvoltage protection with acousto-optic early warning and external expansion interface circuit as claimed in claim 5; it is characterized in that: the power supply circuit of this device adopts series connection 220K resistance R 1 step-down and series diode D2, D3, D4, D5, forms as filter rectification and 1F vast capacity capacitor C 1, adopts diode DW1 voltage stabilizing simultaneously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200720070747XU CN201048287Y (en) | 2007-06-07 | 2007-06-07 | Overvoltage protector with acousto-optic early warning and exterior extension interface circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200720070747XU CN201048287Y (en) | 2007-06-07 | 2007-06-07 | Overvoltage protector with acousto-optic early warning and exterior extension interface circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201048287Y true CN201048287Y (en) | 2008-04-16 |
Family
ID=39300881
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU200720070747XU Expired - Fee Related CN201048287Y (en) | 2007-06-07 | 2007-06-07 | Overvoltage protector with acousto-optic early warning and exterior extension interface circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201048287Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102255317A (en) * | 2011-06-28 | 2011-11-23 | 六安天时节能科技服务有限公司 | Earthquake alarm household electronic power saver |
| CN107831355A (en) * | 2017-10-26 | 2018-03-23 | 国网重庆市电力公司检修分公司 | Transformer overvoltage method for early warning based on a large amount of overvoltage number data |
-
2007
- 2007-06-07 CN CNU200720070747XU patent/CN201048287Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102255317A (en) * | 2011-06-28 | 2011-11-23 | 六安天时节能科技服务有限公司 | Earthquake alarm household electronic power saver |
| CN102255317B (en) * | 2011-06-28 | 2013-04-17 | 六安天时节能科技服务有限公司 | Earthquake alarm household electronic power saver |
| CN107831355A (en) * | 2017-10-26 | 2018-03-23 | 国网重庆市电力公司检修分公司 | Transformer overvoltage method for early warning based on a large amount of overvoltage number data |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080416 Termination date: 20110607 |