CN2733702Y - Power supply protector - Google Patents
Power supply protector Download PDFInfo
- Publication number
- CN2733702Y CN2733702Y CN 200420079189 CN200420079189U CN2733702Y CN 2733702 Y CN2733702 Y CN 2733702Y CN 200420079189 CN200420079189 CN 200420079189 CN 200420079189 U CN200420079189 U CN 200420079189U CN 2733702 Y CN2733702 Y CN 2733702Y
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- resistance
- power supply
- electrode
- piezo
- diode
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Abstract
The utility model relates to a power supply protector, comprising an insulating casing, a metal electrode, and voltage dependent resistors. The metal electrode is provided with a zero line, an earth, and a live conductor, which are fixed on a base according to positions corresponding to three holes of a power supply socket; one voltage dependent resistor is connected between a zero line electrode and an earth electrode, and one voltage dependent resistor is connected between a live conductor electrode and the earth electrode; the insulating casing is covered on the base, and one end of the zero line electrode, the earth electrode, and the live conductor electrode is connected with the power supply socket. The utility model has the advantages of easy use, mature technique, lower cost, and easy popularization. The power supply protector can be widely applied to different occasions of power supply protection, in particular to protection of household power supply and detection of socket wiring.
Description
Technical field
The utility model relates to a kind of apparatus for protecting power supply.
Background technology
In daily electricity consumption; because the characteristics of electrical network itself; user's power supply tends to occur the problem of overvoltage, low pressure, surge voltage, thunderbolt voltage; if do not eliminate these abnormal phenomenons in time; connect the impact that power consumption equipment in the power supply will suffer overvoltage or low pressure so, cause the phenomenon that equipment work is undesired or damage.The reason that causes mains voltage variations is a lot, but modal overtension or low excessively main cause, be exactly that zero line contact in the transmission line is bad or broken, over the ground voltage has also just departed from zero volt greatly on the zero line, original user's of entering voltage is redistributed with the size of load in the transmission line, its result is exactly that user's voltage occur to surpass 300 volts or be lower than 100 volts phenomenon, under this voltage, generally be unaffordable for electrical equipment commonly used, the supply voltage that does not break away from this danger fast, tend to the damage power consumption equipment of full wafer, the loss that causes is very big.
In addition, also can recurrent thunderstorm weather in the actual life, thunder and lightning causes that the voltage in the supply line is instantaneous and changes significantly, if these energy of untimely absorption, will the impact failure electronic device or influence the performance of electrical equipment.Surge voltage that interference caused that produces when being exactly different electrical work in addition etc. also can make electronic device works be affected.
Protective device when earth connection is electric equipment generation electric leakage in a single day; when the shell of equipment is conducted because of certain reason and live wire, just have electric current and flow through ground wire, make leakage switch or blown fuse in the circuit; if but ground wire will produce outer casing electrification danger when imperfect earth occurring.
Three socket wiring of family and leakage switch functional check tend to make troubles to the ordinary person, and the utility model designs at the problems referred to above.
Summary of the invention
The technical problems to be solved in the utility model provides a kind ofly can prevent effectively that the power supply supply power voltage is too high, low excessively, thunderbolt voltage, surge voltage, because imperfect earth causes the apparatus for protecting power supply of outer casing electrification danger.
The utility model apparatus for protecting power supply, comprise insulation crust, metal electrode, piezo-resistance, metal electrode has three of zero lines, ground wire, live wire, by being fixed on the base with three correspondence positions of supply socket, a piezo-resistance is bound up between zero line and the ground line electrode, and the pressure sensitive voltage of this piezo-resistance is usually at 10-35V; A piezo-resistance is bound up between live wire and the ground line electrode, and the pressure sensitive voltage of this piezo-resistance is higher, usually about 300-500V; Insulation crust covers on the base, and an end of zero line, ground wire, three electrodes of live wire is used for being connected with supply socket.Insulation crust and base can be one, also can be splits, can use opaque material, also can use transparent material.Piezo-resistance also can be replaced by the transition diode.Shape one end of three metal electrodes cooperates with three of supply socket respectively, and the other end can be poroid, cooperates with another plug.
The utility model comprises an electric power polarity check circuit of being made up of resistance, diode, light-emitting diode, testing button, one terminating diode positive pole of testing button, other end connecting to neutral line electrode, one termination firewire electrode of resistance, another termination diode cathode, light-emitting diode is connected in parallel on the diode two ends.
The utility model comprises that also one is formed power supply wiring inspection and leakage switch functional check circuit by resistance, diode, light-emitting diode, testing button, resistance, diode series connection, light-emitting diode is connected in parallel on diode, one terminating diode positive pole of testing button, other end earth connection electrode, the other end of the resistance line electrode of starting to exchange fire, the normally-closed contact of testing button is connected between zero line and the piezo-resistance.
Electric current when electric power polarity inspection and power supply wiring inspection and the work of leakage switch functional circuit is between the 20-50 milliampere.
The utility model apparatus for protecting power supply is easy to use, technology maturation, and cost is lower, is easy to again promote the use of, and it can be widely applied to different power protection occasions, and the protection and the socket wiring that are particularly suitable for household electrical source detect.
Description of drawings
Fig. 1 is the utility model structural representation.
Fig. 2 is the generalized section of the utility model structure.
Fig. 3 is one of a utility model embodiment schematic diagram.
Fig. 4 is one of a utility model embodiment generalized section.
Fig. 5 is two schematic diagrames of the utility model embodiment.
Fig. 6 is two generalized sections of the utility model embodiment.
Fig. 7 is three schematic diagrames of the utility model embodiment.
1, firewire electrode; 2, zero wire electrode; 3, line electrode; 4, the high piezo-resistance of piezo-resistance 5, pressure sensitive voltage that pressure sensitive voltage is low; 6, shell; 7, base; 1-1, jack; 2-1, jack; 3-1, jack; 11, resistance; 12, diode; 13, light-emitting diode; 14, testing button.
Embodiment
In conjunction with Fig. 1 and Fig. 2 concrete enforcement of the present utility model is described further.The pressure sensitive voltage value of two piezo-resistances is respectively 33 volts and 470 volts, diode is common 1N4007 commonly used, resistance is 5100 Ω, utilize commercially available common power three-pin plug, open bottom, being that MYJ10-471K piezo-resistance 5 is welded between live wire 1 and ground wire 3 electrodes then with a model, is that the piezo-resistance 4 of MYJ10-330K is welded between zero line 2 and ground wire 3 electrodes with the another model, shell and base is connected to get final product again.
When causing zero line break in the supply line or loose contact because of certain reason, three leads lose neutral point in the power transmission line, over the ground voltage has also just departed from zero volt greatly on the zero line, and make original user's of entering voltage redistribute with the size of load in the transmission line, the voltage that the result enters the user tends to the normal numerical value of substantial deviation, just have voltage and surpass 300 volts or be lower than 100 volts phenomenon, the so-called zero line of user no longer is a zero line at this moment, above it ground wire is had certain voltage.The voltage that is connected on the piezo-resistance 4 between the zero line and ground wire in the plug is very low; when in case the voltage on zero line and the ground wire surpasses the pressure sensitive voltage of piezo-resistance 4; piezo-resistance will conducting, and electric current increases rapidly, thereby makes earth leakage circuit-breaker action or blown fuse in the circuit.Because the pressure sensitive voltage of this piezo-resistance is lower, usually about 30 volts, so the timely safety of the power consumption equipment in the protection circuit.
At zero line just often, when power source voltage surpassed the pressure sensitive voltage of piezo-resistance 5, the resistance of piezo-resistance 5 can change, and at this moment will flow through certain electric current in piezo-resistance 5; Because the electric current of piezo-resistance flows to ground wire, so for earth leakage protective supply line electricity is arranged, be exactly that leakage current has taken place, if in the piezo-resistance 5 electric current when surpassing the operating current of the earth leakage circuit-breaker in the supply line, earth leakage circuit-breaker will move, the power supply that disconnects in the protected loop is supplied with, thus the safety of protection power consumption equipment; If there is not earth leakage circuit-breaker, electric current can continue to increase, and when exceeding the drop-away current of air switch, then air switch moves, and also can turn-off the power supply of power consumption equipment, the safety of protection equipment; Fuse in the power supply is fused, also can cut off the electricity supply timely.
When power supply lines produces because of thunderbolt or other pulse voltage, piezo-resistance 4 and the piezo-resistance 5 common lightning induced surges that absorb on the circuit come then as higher transient voltage, and the resistance of piezo-resistance can sharply reduce, absorb the energy of pulse, the assurance power consumption equipment is not received impact.Simultaneously, piezo- resistance 4,5 lumps together, and can play the effect of eliminating the thunderbolt voltage in the power supply, and the current potential of three lines is consistent when impacted by lightning voltage, be unlikely to take place the phenomenon of line insulation infringement, the extent of injury that power consumption equipment and cable are impacted in the reduction power supply.
When the earth connection in the power supply because of certain reason imperfect earth or when breaking; if the outer casing electrification of electric equipment in the power supply; so; the primary voltage that will between zero line and ground line electrode, have power supply; because the pressure sensitive voltage of piezo-resistance 4 is lower, so piezo-resistance 5 conducting rapidly is similar to short circuit with zero line and live wire; the guarantor one danger silk of fusing power supply or air switch is disconnected, protection and equipment contactee's safety.
Whether the utility model can also be used to detecting the wiring polarity that has three sockets of earth leakage circuit-breaker in the family correct, at this moment need be on the live wire of utility model and zero wire electrode a power supply test button in parallel and indicator light circuit, as Fig. 5 and Fig. 6.Fig. 5 and Fig. 6 represent to have the apparatus for protecting power supply structural representation of electric power polarity check circuit; with a terminating diode positive pole of testing button 14, other end connecting to neutral line electrode 2, a termination firewire electrode 1 of resistance 11; another termination diode cathode, light-emitting diode 13 is connected in parallel on diode 12.Light-emitting diode 13 is contained on shell or the base with testing button 14 and gets final product.
Behind the charged socket that the plug insertion of utility model is detected, press testing button TEST,, illustrate that then the wiring polarity of three sockets is correct if indicator light is long bright; If indicator light does not work or the earth leakage protective action, the connection mistake then is described, like this, can make things convenient for the user to check whether the connection of the supply socket in the own home is correct, removes a hidden danger.Operation principle is as follows: three power lines on the socket can have 6 kinds of different connections.When if the live wire mistake is connected on the ground line position on the socket, the utility model of tape test circuit is inserted socket, press testing button, because the voltage between the electrode 2,3 surpasses the pressure sensitive voltage of piezo-resistance 4, the mains switch that makes after piezo-resistance 4 conductings is threaded off, owing to do not have voltage on electrode 1 and the electrode 2,, can get rid of two kinds so indicator light does not work; When if the live wire mistake is connected on the zero line position on the socket, the ground wire wiring is correct, then because the voltage between electrode 1 and the electrode 3 surpasses the pressure sensitive voltage of piezo-resistance 4, make after piezo-resistance 4 conductings electric current is arranged in the earth connection, leakage switch action deenergization, press behind the TEST button because power supply disconnects, indicator light does not work; When zero line mistake on the socket is connected on the ground line position, the live wire wiring is correct, press the TEST button, the electric current that indicator light circuit has above the earth leakage protective device drop-away current flows through, owing to flow to ground wire,, cut off the electricity supply so can make the leakage switch action, extinguish after indicator light is glittering, also the president is not bright; So have only when three wiring polarity all meet the requirements, press testing button after, indicator light just president is bright.
The function that the utility model can also be used to detecting the wiring that has three sockets of earth leakage circuit-breaker in the family and earth leakage circuit-breaker is incorrect; at this moment need be on the live wire of utility model and ground line electrode a power supply test button in parallel and indicator light circuit, as Fig. 7.Fig. 7 represents to have the apparatus for protecting power supply structural representation of power supply wiring check circuit and leakage switch functional test; resistance 11, diode 12 series connection; light-emitting diode 13 is connected in parallel on diode; one terminating diode positive pole of testing button 14; other end earth connection electrode 3; the other end of resistance 11 line electrode 1 of starting to exchange fire, the normally-closed contact of testing button 14 is connected between zero wire electrode 2 and the piezo-resistance 4.
Behind the charged socket that the plug insertion of utility model is detected, press testing button TEST, if indicator light is glittering, the action of threading off takes place in earth leakage circuit-breaker simultaneously, the wiring that three sockets then are described is correct, and the earth leakage circuit-breaker function is normal, otherwise is exactly that the wiring or the earth leakage circuit-breaker of socket has problem, need to check and change, the danger of getting an electric shock takes place in avoiding using; Principle is as follows: when the socket wiring under the correct and normal situation of creepage protection function, after pressing testing button, be connected in the test circuit between ground wire and the live wire and flow through with regard to having about 40 milliamperes electric current, this just is equivalent to cause the specified action leakage current of earth leakage circuit-breaker, so light-emitting diode glittering once after, the earth leakage circuit-breaker action of take place threading off; When if the live wire mistake is connected on the ground line position on the socket, the utility model of tape test circuit is inserted socket, press testing button, because the voltage between the electrode 2,3 surpasses the pressure sensitive voltage of piezo-resistance 4, the mains switch that makes after piezo-resistance 4 conductings is threaded off, owing to do not have voltage on electrode 1 and the electrode 3,, can get rid of two kinds so indicator light does not work; When if the live wire mistake is connected on the zero line position on the socket, the ground wire wiring is correct, then because the voltage between electrode 1 and the electrode 3 surpasses the pressure sensitive voltage of piezo-resistance 4, make after piezo-resistance 4 conductings electric current is arranged in the earth connection, leakage switch action deenergization, press behind the TEST button because power supply disconnects, indicator light does not work; When zero line mistake on the socket was connected on the ground line position, the live wire wiring was correct, presses the TEST button, and indicator light circuit can be lighted, but earth leakage circuit-breaker can not move; So have only when three power line wiring and earth leakage protective all meet the requirements, press testing button after, indicator light just can be glittering.
Also having a kind of embodiment is as Fig. 3 and Fig. 4, three electrode one ends are made column or cuboid, the other end is done the pore-forming post, three electrode positions cooperate with three sockets of power supply equally, the electrode middle part is fixed on the base 7, equally a piezo-resistance 5 is welded between live wire 1 and the ground line electrode 3, with another piezo-resistance 4 be welded on zero line with between the line electrode 3, will have three shell 6 at last and cover on the base 7 and get final product.
Because it is lower to be bound up on the pressure sensitive voltage of the piezo-resistance between zero line and the ground wire, about 30V, the pressure sensitive voltage that is bound up on live wire and ground wire piezo-resistance is higher, usually about 400V usually; When power supply power supply just often, the voltage on this moment each piezo-resistance is all less than pressure sensitive voltage, the resistance of piezo-resistance is very big, is in monitored state, and what bad influence power supply is not had yet, power consumption almost can be ignored.
Claims (8)
1, apparatus for protecting power supply, comprise insulation crust, metal electrode, piezo-resistance, its feature: metal electrode has three of zero lines, ground wire, live wire, by being fixed on the base with three correspondence positions of supply socket, a piezo-resistance connects zero line and ground line electrode, the another piezo-resistance, connect live wire and ground line electrode, be bound up on the pressure sensitive voltage height of the pressure sensitive voltage of the live wire and the piezo-resistance of ground line electrode than the piezo-resistance that is bound up on zero line and ground line electrode; Insulation crust covers on the base, and zero line, ground wire, three electrode one ends of live wire are used for being connected with supply socket.
2, apparatus for protecting power supply according to claim 1; its feature: comprise a supply socket polarity checking circuit of forming by resistance, diode, light-emitting diode, testing button; resistance, diode series connection; light-emitting diode is connected in parallel on diode; one terminating diode positive pole of testing button; other end connecting to neutral line electrode, the other end of the resistance line electrode of starting to exchange fire.
3, apparatus for protecting power supply according to claim 1; its feature: also comprise a power supply wiring inspection and a leakage switch functional check circuit of forming by resistance, diode, light-emitting diode, testing button: resistance, diode series connection; light-emitting diode is connected in parallel on diode; one terminating diode positive pole of testing button; other end earth connection electrode; the other end of the resistance line electrode of starting to exchange fire, the normally-closed contact string of testing button is between connection zero wire electrode and piezo-resistance.
4, according to claim 2 or 3 described apparatus for protecting power supply, its feature: the electric current when supply socket polarity checking circuit and power supply wiring inspection and leakage switch functional check circuit working is at the 20-50 milliampere.
5, according to claim 1 or 2 or 3 described apparatus for protecting power supply, its feature: be bound up on the piezo-resistance between zero line and the ground line electrode, its pressure sensitive voltage is at 10-35V; The pressure sensitive voltage of the piezo-resistance of another is at 300-500V.
6, according to claim 1 or 2 or 3 described apparatus for protecting power supply, its feature: piezo-resistance also can be replaced by the transition diode.
7, according to claim 1 or 2 or 3 described apparatus for protecting power supply, its feature: insulation crust and base can be the opaque of split, also can be that one is transparent.
8, according to claim 1 or 2 or 3 described apparatus for protecting power supply, its feature: the metal electrode shape can be that an end cooperates with three of supply sockets, and the other end is poroidly to cooperate with another plug.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420079189 CN2733702Y (en) | 2004-09-03 | 2004-09-03 | Power supply protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420079189 CN2733702Y (en) | 2004-09-03 | 2004-09-03 | Power supply protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2733702Y true CN2733702Y (en) | 2005-10-12 |
Family
ID=35069538
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420079189 Expired - Fee Related CN2733702Y (en) | 2004-09-03 | 2004-09-03 | Power supply protector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2733702Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105024340A (en) * | 2015-08-11 | 2015-11-04 | 国网浙江桐乡市供电公司 | Simple overvoltage protection trigger device |
| WO2021082503A1 (en) * | 2019-10-29 | 2021-05-06 | 公牛集团股份有限公司 | Plug protection sleeve, plug structure, and electrical device |
-
2004
- 2004-09-03 CN CN 200420079189 patent/CN2733702Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105024340A (en) * | 2015-08-11 | 2015-11-04 | 国网浙江桐乡市供电公司 | Simple overvoltage protection trigger device |
| WO2021082503A1 (en) * | 2019-10-29 | 2021-05-06 | 公牛集团股份有限公司 | Plug protection sleeve, plug structure, and electrical device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |