CN102904207A - Overvoltage protector - Google Patents
Overvoltage protector Download PDFInfo
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- CN102904207A CN102904207A CN2012103712244A CN201210371224A CN102904207A CN 102904207 A CN102904207 A CN 102904207A CN 2012103712244 A CN2012103712244 A CN 2012103712244A CN 201210371224 A CN201210371224 A CN 201210371224A CN 102904207 A CN102904207 A CN 102904207A
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Abstract
The invention discloses an overvoltage protector which comprises a circuit board, a shell base, a shell cover plate, a switch, a protective tube, an indicating lamp, wiring terminals, a screw, a resistor and a TVS (transient voltage suppressor) tube, wherein the switch, the protective tube and the indicating tube are installed on the shell cover plate, and are connected with the circuit board in the shell; the wiring terminals are designed at two ends of the circuit board, and are used for the input and output of voltage; the shell base and the shell cover plate are connected by the screw; when the input voltage is equal to or lower than the rated voltage, normal working voltage is provided for equipment; and when the input voltage is higher than the rated voltage, overvoltage is prevented from being input into the protected equipment. The overvoltage protector disclosed by the invention is small in volume, is simple in structure and is convenient to install, meanwhile has the visual display working state of the indicating lamp, provides imperative equipment for starting the electrician experiment lesson for majors of network of computer and the like in colleges and universities, and improves the operational ability for students.
Description
[technical field]
The invention belongs to a kind of electronic electric equipment overvoltage protection; be particularly suitable for being installed in various DC electronic electric equipments and the front end that exchanges low-voltage equipment; prevent that the overvoltage that is higher than the equipment rated operational voltage is input in the equipment, avoid overvoltage injury operating personnel or puncture and damage protected electronic electric equipment.
[background technology]
In electronic information technology, electric automatization, mechanical automation, intelligent, computer application, engineering project and the enterprises such as computer network, various Training Rooms and the laboratory of school, a large amount of oscilloscopes are arranged, tester, rig camera, the electronic electric equipments such as detector, the rated power of these equipment is generally little, rated operational voltage is not high yet, generally be divided into AC and DC two classes, working volts alternating current is generally 220 volts or 36 volts or 12 volts etc., direct-current working volts are generally 36 volts or 24 volts or 18 volts etc., the existing 220V alternating voltage of a lot of devices or system is also arranged, the interchange or the direct-current working volts that are lower than 36 volts are also arranged.Multiple systems or equipment are arranged in various laboratories and Training Room especially, the operating voltage of these systems and equipment is often not identical, testing or need to connect and fix various electric wires during real training, often occur the electric wire wrong is caused the overvoltage damage equipment, personal injury accident occurs when serious.For example the equipment rated operational voltage is safe voltage below 36 volts the time, and hand operation often is if mistake will because of the direct damage equipment of overvoltage, also can make operating personnel get an electric shock threat to life safety 220 volts of voltage access devices.
Particularly in the non-Electric Specialty laboratory such as the electronic information class of school, Computer Networks Courses, Internet of Things class or the Training Room, there are a lot of systems and equipment to use multiple rated operational voltage, often these non-Electric Specialties do not arrange the specialized courses such as electrotechnics and circuit theory, perhaps experiment and real training are early than these specialized courses, teachers and students do not have the electrotechnics knowledge and experience, also unclear superpotential harm, electric shock accidents occurs or damages expensive equipment in the event that wrong electric wire or hand operation often occur.This shows that various device front end at the various laboratories of school and Training Room needs the overvoltage protection device of configure dedicated.
In addition, the equipment that uses in the various laboratories of school and Training Room often all is commercial Application equipment, these equipment input and output binding posts mostly are copper material, be fit to expert engineer's operation, not only small-sized, and the life-span only has tens times or hundreds of, for example the binding post of rig camera is fit to carefully install with very little instrument screwdriver, if with king bolt cutter or firmly installation, will stripped thread, damage binding post, cause the equipment of whole costliness normally to use, because be that manual operation damages, producer can free repair guarantee yet.
School's Training Room is specially for the construction of student's real training, per tour 30-50 people, and everyone needs to carry out several times real training operation at least, and after the several classes of real trainings, a lot of equipment of Training Room will have been scrapped because of reasons such as overvoltage and manual operations.The normal service lifes such as the Computer Equipment Training Room of many colleges and universities, intelligent monitoring Training Room and gate control system Training Room only have halves or two terms in recent years, main cause be exactly the overvoltage damage equipment or equipment interface, screw or screw artificial damage are installed, had a strong impact on practice teaching, many schools no longer build these Training Rooms, the student can not carry out these real trainings, cause thus students' skill can not satisfy enterprise demand, the Students ' Employment difficulty, the Computer Specialty enrollment is difficulty also.
[summary of the invention]
The purpose of this invention is to provide a kind of overvoltage protection device, be installed in the front end of protection equipment, detect voluntarily and open circuit when input voltage is higher than rated voltage, indicator light does not work; Detect voluntarily when input voltage equals rated voltage and the holding circuit normal power supply, indicator light shows green simultaneously; The binding post at overvoltage protection device two ends repeatedly repeated removal is changed with installation, has the long life-span, realizes electric equipment and the binding post that carries are protected, and is particularly suitable in all kinds of laboratories or the Training Room use.
To achieve these goals, the present invention adopts following technical scheme:
A kind of overvoltage protection device comprises circuit board, housing base and housing cover and excess voltage protection; Described excess voltage protection comprises switch, protective tube, indicator light, binding post, resistance and TVS pipe; Circuit board is installed on the housing base; Switch, protective tube, indicator light are installed on the housing cover, and are connected with circuit board in housing; Housing cover is installed on the housing base, and circuit board is fixed between housing base and the housing cover; Circuit board one end is provided with the input subgroup, and other end correspondence is provided with the output subgroup, and the input subgroup comprises that input is anodal and input negative pole, and the output subgroup comprises the output cathode output negative pole; Input is anodal divides into groups corresponding with output cathode, input negative pole with output negative pole; Input anodal connecting valve one end, the switch other end connects protective tube one end, and the protective tube other end connects TVS and manages an end, indicator light one end and output cathode; The TVS pipe other end connects input negative pole, output negative pole and resistance one end; The resistance other end connects the indicator light other end.
The present invention further improves and is: when input voltage was equal to or less than rated voltage, the TVS pipe was in open-circuit condition, and indicator light is shown in green, and input and output voltage in protector two ends is identical, for equipment provides normal working voltage; When input voltage was higher than rated voltage, the TVS pipe was in short-circuit condition, and protective tube blows, and indicator light does not work, and the overvoltage protection device output voltage is zero, has stoped overvoltage to input protected equipment.
The present invention further improves and is: housing base is connected screw to connect with housing cover.
The present invention further improves and is: be designed with Φ 8 or Φ 10 installing holes on circuit board and the housing base, pitch-row is 80 millimeters or 100 millimeters etc., is fit to be installed on other protected equipment.
The present invention further improves and is: described overvoltage protection device comprises two groups or more excess voltage protection.
The present invention further improves and is: binding post is the PCB terminal, also can be other various binding posts.
When equipment uses, connect input and output two ends line, open control switch, when input voltage was equal to or less than rated voltage, indicator light was lighted, normal output voltage; When voltage was higher than rated voltage, indicator light did not work, and protective tube blows, and no-output voltage needs to change protective tube before using next time.
With respect to existing equipment, the present invention has the following advantages: a kind of overvoltage protection device is provided, has been installed in the front end of protected equipment, detected voluntarily and open circuit when input voltage is higher than rated voltage, indicator light does not work; Detect voluntarily when input voltage is equal to or less than rated voltage and the holding circuit normal power supply, indicator light shows green simultaneously; The binding post at overvoltage protection device two ends is repeated removal and installation replacing repeatedly; has the long life-span; realization is protected electric equipment and the binding post that carries; after each overvoltage protection action; only need to change fuse; just the energy Reusability is particularly suitable in all kinds of laboratories or the Training Room use.
[description of drawings]
The invention will be further described below in conjunction with embodiment and accompanying drawing:
Fig. 1 is the structural representation of a kind of overvoltage protection device of the present invention;
Fig. 2 is the circuit theory diagrams of overvoltage protection device shown in Figure 1.
Among the figure, 1, circuit board; 2, housing base; 3, housing cover; 4, control switch; 5, protective tube; 6, indicator light; 7, binding post; 711, input is anodal; 712, input negative pole; 721, output cathode; 722, output negative pole; 8, screw; 9, resistance; 10, TVS pipe.
[embodiment]
See also illustrated in figures 1 and 2ly, a kind of overvoltage protection device of the present invention comprises circuit board 1, housing base 2, housing cover 3, switch 4, protective tube 5, indicator light 6, binding post 7, screw 8, resistance 9, TVS pipe 10 etc.; Circuit board 1 is installed on the housing base 2; Switch 4, protective tube 5, indicator light 6 each two symmetry are installed on the housing cover 3, and in housing, be connected with circuit board 1, circuit board 1 two ends are designed with binding post 7,711 are the input positive pole, 712 are the input negative pole, and 721 is output cathode, and 722 is output negative pole, and grouping is corresponding, consists of the two-way input and output; Indicator light 6, resistance 9, TVS pipe 10 etc. are installed between the both positive and negative polarity of circuit board 1.
Circuit board 1 is provided with Φ 8 installing holes with housing base 2 in the both sides same position, and pitch-row is 100 millimeters, equipment can be installed on all kinds of protected equipment.
Circuit part is realized the overvoltage power down function of voltage by TVS pipe 10, equipment comprises the two-way overvoltage protection in this example, and the rated voltage of circuit is respectively 12V and 24V.
Circuit structure as shown in Figure 2, in the first via overvoltage crowbar, protective tube 5 blowout currents are 1A, indicator light 6 is the LED lamp, resistance 9 resistances are 1K Ω, the model of TVS pipe 10 is 1.5KE12CA.Second passes by in the voltage protection circuit, and protective tube 5 blowout currents are 2A, and indicator light 6 is the LED lamp, and resistance 9 resistances are 3K Ω, and it is 1.5KE24CA that TVS manages 10 specifications.During use, voltage input connects input anodal 711 and input negative pole 712, and electric current flow through switch 4 and protective tube 5 manage 10 and be connected in thereafter with TVS after indicator light 6 series resistances 9.When input voltage was equal to or less than rated voltage, TVS pipe 10 was in open-circuit condition, and indicator light 6 is bright, output 721,722 identical with input 711,712 current potentials; When input voltage was higher than rated voltage, TVS managed for 10 moments and is in conducting state, and protective tube 5 is because disconnecting by electric current is excessive, and indicator light 6 does not work, and output end voltage is zero, had realized the function of overvoltage protection.
Claims (5)
1. an overvoltage protection device is characterized in that: comprise circuit board (1), housing base (2), housing cover (3) and excess voltage protection; Described excess voltage protection comprises switch (4), protective tube (5), indicator light (6), binding post (7), resistance (9) and TVS pipe (10); Circuit board (1) is installed on the housing base (2); Switch (4), protective tube (5), indicator light (6) are installed on the housing cover (3), and are connected with circuit board (1) in housing; Housing cover (3) is installed on the housing base (2), and circuit board (1) is fixed between housing base (2) and the housing cover (3); Circuit board (1) one end is provided with the input subgroup, and other end correspondence is provided with the output subgroup, and the input subgroup comprises input anodal (711) and input negative pole (712), and the output subgroup comprises output cathode (721) output negative pole (722); Input anodal (711) is divided into groups corresponding with output cathode (721), input negative pole (712) with output negative pole (722); Anodal (711) connecting valve (4) one ends of input, switch (4) other end connects protective tube (5) one ends, and protective tube (5) other end connects TVS pipe (10) one ends, indicator light (6) one ends and output cathode (721); TVS pipe (10) other end connects input negative pole (712), output negative pole (722) and resistance (9) one ends; Resistance (9) other end connects indicator light (6) other end.
2. overvoltage protection device according to claim 1 is characterized in that: when input voltage was equal to or less than rated voltage, TVS pipe (10) was in open-circuit condition, and indicator light (6) is shown in green, for equipment provides normal working voltage; When input voltage was higher than rated voltage, TVS pipe (10) was in short-circuit condition, and protective tube (5) blows, and indicator light (6) does not work, and the overvoltage protection device output voltage is zero.
3. overvoltage protection device according to claim 1, it is characterized in that: housing base (2) is connected 3 with housing cover) connect with screw (8).
4. overvoltage protection device according to claim 1, it is characterized in that: described overvoltage protection device comprises two groups or more excess voltage protection.
5. overvoltage protection device according to claim 1, it is characterized in that: described binding post (7) is PCB terminal or binding post.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103712244A CN102904207A (en) | 2012-09-28 | 2012-09-28 | Overvoltage protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103712244A CN102904207A (en) | 2012-09-28 | 2012-09-28 | Overvoltage protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102904207A true CN102904207A (en) | 2013-01-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012103712244A Pending CN102904207A (en) | 2012-09-28 | 2012-09-28 | Overvoltage protector |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111355224A (en) * | 2020-03-20 | 2020-06-30 | 海信（山东）空调有限公司 | Protection circuit and electrical apparatus of controller |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1437292A (en) * | 2003-03-10 | 2003-08-20 | 张�杰 | Portable power source lightning arrester |
| CN201518411U (en) * | 2009-10-19 | 2010-06-30 | 东莞市阿利恩电子有限公司 | Novel overvoltage protector |
| CN201853463U (en) * | 2010-09-25 | 2011-06-01 | 惠州泰科立集团股份有限公司 | Power supply device of LCM testing system |
| CN201994651U (en) * | 2011-03-15 | 2011-09-28 | 惠州百图丽实业有限公司 | Lightning protection control panel and lightning protection camera device |
-
2012
- 2012-09-28 CN CN2012103712244A patent/CN102904207A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1437292A (en) * | 2003-03-10 | 2003-08-20 | 张�杰 | Portable power source lightning arrester |
| CN201518411U (en) * | 2009-10-19 | 2010-06-30 | 东莞市阿利恩电子有限公司 | Novel overvoltage protector |
| CN201853463U (en) * | 2010-09-25 | 2011-06-01 | 惠州泰科立集团股份有限公司 | Power supply device of LCM testing system |
| CN201994651U (en) * | 2011-03-15 | 2011-09-28 | 惠州百图丽实业有限公司 | Lightning protection control panel and lightning protection camera device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111355224A (en) * | 2020-03-20 | 2020-06-30 | 海信（山东）空调有限公司 | Protection circuit and electrical apparatus of controller |
| CN111355224B (en) * | 2020-03-20 | 2022-09-09 | 海信空调有限公司 | Protection circuit and electrical apparatus of controller |
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Application publication date: 20130130 |