CN203180483U - Cascade protection circuit for extension socket - Google Patents
Cascade protection circuit for extension socket Download PDFInfo
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- CN203180483U CN203180483U CN 201220685475 CN201220685475U CN203180483U CN 203180483 U CN203180483 U CN 203180483U CN 201220685475 CN201220685475 CN 201220685475 CN 201220685475 U CN201220685475 U CN 201220685475U CN 203180483 U CN203180483 U CN 203180483U
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- circuit
- socket
- cascade protection
- control
- protection circuit
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Abstract
The utility model discloses a cascade protection circuit for an extension socket. The cascade protection circuit for the extension socket includes an induction circuit, an anti-interference shaping filtering circuit, a control circuit and an execution circuit. The induction circuit senses over-current signals of a live wire in a group of output terminals and generates over-current signal voltage. The anti-interference shaping filtering circuit is connected with the induction circuit and realizes anti-interference reshaping and filtering treatment for over-current signal voltage. The control circuit is provided with an input terminal, an output terminal and a control terminal. The control terminal is connected with an output terminal of the anti-interference shaping filtering circuit. The execution circuit is provided with a power switch arranged on the live wire or a zero wire in the group of output terminals and a trip coil connected with an output terminal of the control circuit. The trip coil controls the switching-off of the power switch. The control circuit is disconnected when the induction circuit generates over-current signal voltage and output voltage of the shaping filtering circuit reaches to or surpasses a threshold value of the control circuit, so that the trip coil is driven to act for switching off the power switch. The cascade protection circuit for the extension socket provided by the utility model can be used for realizing automatic protection of the extension socket and loaded electric devices.
Description
Technical field
The utility model relates to the protective circuit field; relate to a kind of socket cascade protection circuit in particular; it can carry out the anti-surge protection of lightning protection, overtemperature protection, overcurrent protection and short-circuit protection to socket; thereby avoid socket self to burn; and can protect the electrical equipment of institute's load simultaneously, avoid burning out phenomenons such as electrical appliance and breaking out of fire.
Background technology
Along with the progress of society and improving constantly of people's living standard, various power consumption equipments increase gradually, and for the ease of the putting and allow power consumption equipment all can connect civil power of power consumption equipment, this socket becomes ancillary attachement devices indispensable in people's daily life.
Common socket in the market generally comprises one group of input terminal and at least 2 group lead-out terminals, and at least two group lead-out terminals are relation parallel with one another, so can supply with at least two power consumption equipments provide electric energy.It only is the simple increase that can realize on the circuit for above-mentioned socket, in case socket is met thunder and lightning and surge or faults such as overheated, overcurrent, overvoltage or short circuit is taken place, above-mentioned socket will occur burning the electrical equipment of institute's load such as self is burnt out, even causes hidden danger such as fire.
The utility model content
Main purpose of the present utility model is to provide a kind of socket cascade protection circuit; it is corresponding to every group of lead-out terminal; be used for this group lead-out terminal is prevented that the thunder and lightning wave resistance gushes, anti-overvoltage, overcurrent protection and short-circuit protection, thereby reach the effect of protection socket and institute's load appliance.
In order to reach above-mentioned purpose, solution of the present utility model is:
A kind of socket cascade protection circuit; wherein; be arranged between every group of lead-out terminal and the input terminal to protect the electrical equipment of this group lead-out terminal and institute's load; allow each jack of each joint of socket that a protective circuit of setting according to the size of current of electrical appliance is arranged, this socket cascade protection circuit comprises:
Sensor circuit is responded to the over-current signal of live wire in this group lead-out terminal and is generated over-current signal voltage;
The anti-dried plastic filter circuit of scratching links to each other with sensor circuit and over-current signal voltage is resisted dried scratch shaping and filtering processing;
Control circuit has input, output and control end, and this control end links to each other with anti-dried output of scratching plastic filter circuit;
Executive circuit, has the tripping coil that is arranged on the mains switch on the live wire in this group lead-out terminal and links to each other with the output of this control circuit, the disconnection of this tripping coil control mains switch, this control circuit generates over-current signal voltage and anti-dried scratching drives executive circuit action disconnecting power switch when the plastic filter circuit output voltage meets or exceeds the threshold values of control circuit at sensor circuit.
Described socket cascade protection circuit also comprises power circuit, and this power circuit is the bridge rectifier that links to each other with this group lead-out terminal, and the input of this power circuit and control circuit, output and executive circuit form a current supply circuit.
Described sensor circuit is for responding to first inductance coil of the over-current signal of live wire in this group output.
Described control circuit is controllable silicon.
Described tripping coil is inner second inductance coil that is provided with iron core, the disconnection of this iron core and electromagnetic induction coil control mains switch.
Described socket cascade protection circuit also comprises first trimmer potentiometer and second trimmer potentiometer that is arranged on the control circuit front end, and this second trimmer potentiometer has the electric current dial.
Described socket cascade protection circuit comprises an overcurrent induction coil. during electrical appliance generation over current fault on being inserted in socket, the over-current signal voltage of live wire raises.Induced voltage/electric current is adjusted voltage when surpassing electric current tuning dial set point through the shaping diode again behind the protection diode; trigger the controllable silicon conducting, coil gets pulse direct current, produces N S magnetic field; N S magnetic field produces the ground motive force between coil and the iron core, promotes the iron core deenergization.
Socket cascade protection circuit also comprise current-limiting resistance and can be when temperature surpasses default definite value the automatic disconnection source, this current-limiting resistance also links to each other with the control end of control circuit.Described socket cascade protection circuit also comprises current-limiting resistance and temperature switch KT, and when socket jack temperature surpassed preset value, the temperature switch closure was protected through current-limiting resistance; Add trigger voltage for the SCR control utmost point, make the controllable silicon conducting, coil gets pulse direct current, produces N S magnetic field, and N S magnetic field produces the ground motive force between coil and the iron core, promotes the iron core deenergization.
Described socket cascade protection circuit also comprises piezo-resistance RV; when thunder and lightning, surge or voltage rising are met in socket; protect through current-limiting resistance; add trigger voltage for the SCR control utmost point; make the controllable silicon conducting, coil gets pulse direct current, produces N S magnetic field; N S magnetic field produces the ground motive force between coil and the iron core, promotes the iron core deenergization.
Described socket cascade protection circuit also comprises short-circuit protection coil L3, and when certain electrical appliance was short-circuited fault in the socket, short circuit current conducting short-circuited coil produced magnetic field, and N S magnetic field produces the ground motive force between coil and the iron core, promotes the iron core deenergization.
After adopting said structure; a kind of socket cascade protection circuit that the utility model relates to; it can realize the over-current signal of current group of lead-out terminal live wire is detected and generate over-current signal voltage by sensor circuit; this over-current signal voltage is through the anti-dried control end that plastic filter circuit carries out shaping filter treatment and supplied control circuit of scratching; if should resist the dried threshold values that the plastic filter circuit output voltage meets or exceeds control circuit of scratching; then make the control circuit conducting coming disconnecting power switch by executive circuit, and then realize the automatic trip of socket.
So, compared with prior art, the utility model can be realized the electrical equipment of socket and institute's load is protected, in addition by auto power off is set, can also automatic trip when temperature is too high, and realize the automatic protection to socket; In addition; owing between every group of lead-out terminal and the input terminal one group of protective circuit being set all; so can adopt the rill protective circuit to protect to little electric current electrical appliance, big electric current electrical appliance then can adopt big stream protective circuit to protect, thereby has the good characteristics of protection effect.
Description of drawings
The theory diagram of Fig. 1 a kind of socket cascade protection circuit for the utility model relates to;
The physical circuit figure of Fig. 2 a kind of socket cascade protection circuit preferred embodiment for the utility model relates to.
Among the figure:
Socket cascade protection circuit-100; Sensor circuit-1; Plastic filter circuit-2;
Control circuit-3; Executive circuit-4; Power circuit-5;
Lead-out terminal-200; Input terminal-300.
Embodiment
In order further to explain the technical solution of the utility model, the utility model is elaborated below by specific embodiment.
As shown in Figure 1; a kind of socket cascade protection circuit 100 that the utility model relates to; it is arranged between every group of lead-out terminal 200 and the input terminal 300; thereby protect the electrical equipment of this group lead-out terminal 200 and institute's load, this socket cascade protection circuit 100 comprises sensor circuit 1, anti-dried plastic filter circuit 2, control circuit 3 and the executive circuit 4 of scratching.
This sensor circuit 1 is used for the over-current signal of these group lead-out terminal 200 live wires of induction, and generates over-current signal voltage; As shown in Figure 2, in the present embodiment, this sensor circuit 1 is the first inductance coil L1.
Should anti-dried plastic filter circuit 2 of scratching, link to each other with sensor circuit 1 and over-current signal voltage is resisted the dried shaping filter processing of scratching; As shown in Figure 2, in this preferred embodiment, this anti-dried plastic filter circuit 2 of scratching is C1, C2, D6 and D7, and wherein D6 and D7 play anti-dried effect of scratching the waveform of adjusting, and C1 and C2 play the effect of filtering.
This control circuit 3 has input, output and control end, and this control end links to each other with anti-dried output of scratching plastic filter circuit 2; As shown in Figure 2, in the present embodiment, this control circuit 3 is controllable silicon, and its concrete model that adopts is MCR100-8; Surge in order to have prevented from starting is directed at false tripping, also is provided with an anti-surge normally closed switch K3 on this input.
This executive circuit 4, have mains switch K1 and tripping coil, this mains switch K1 is arranged on these group lead-out terminal 200 live wires and the zero line, this tripping coil links to each other with the output of this control circuit 3, the disconnection of this tripping coil control mains switch K1, this control circuit 3 generates at sensor circuit 1 and makes controllable silicon be conducting state when over-current signal voltage and plastic filter circuit output voltage meet or exceed the threshold values of control circuit, drives the iron core action disconnecting power switch K1 in the tripping coil.As a kind of concrete structure of this executive circuit 4, described tripping coil is the inner second inductance coil L2 that is provided with iron core, the disconnection of this iron core and inductance coil control mains switch K1.So when control circuit 3 was triggered, the magnetic field that this second inductance coil L2 and iron core thereof can produce the N utmost point and the S utmost point made mains switch K1 trip.
Concrete; as shown in Figure 2; described socket cascade protection circuit 100 also comprises power circuit 5; this power circuit 5 is the bridge rectifier that links to each other with this group lead-out terminal 200; this power circuit 5 forms circuit loop with input, output and the tripping coil of control circuit 3, so supplies with for control circuit 3 provides power supply.In addition, described socket cascade protection circuit 100 also comprises the first trimmer potentiometer RP1 and the second trimmer potentiometer RP2 that is arranged on control circuit 3 front ends, and this second trimmer potentiometer RP2 has the electric current dial; The first trimmer potentiometer RP1 can assist the second fine setting RP2, and error is adjusted, and makes electric current dial index reach better accuracy.
In order to allow the utility model when temperature is too high, also can realize automatic trip, protect socket to the greatest extent; Described socket cascade protection circuit 100 also comprise current-limiting resistance R2 and can be when temperature surpasses default definite value the automatic disconnection source; K2 is the testing button switch, can test this circuit quality. when pressing the testing button switch, also be to go trigger control circuit 3 conductings by current-limiting resistance R2 simulation over-current signal voltage, namely this current-limiting resistance also links to each other with the control end of control circuit 3, and then make the second inductance coil L2 and iron core produce magnetic field, make mains switch K1 tripping operation; Particularly, please refer to shown in Figure 2ly, wherein also comprise temperature switch KT and piezo-resistance RV, this temperature switch KT and piezo-resistance RV are all in parallel with testing button K switch 2.
In sum; a kind of socket cascade protection circuit 100 that the utility model relates to; it can realize the over-current signal of this group lead-out terminal 200 live wires is detected and generate over-current signal voltage by sensor circuit 1; this over-current signal voltage is through the anti-dried control end that plastic filter circuit 2 carries out shaping filter treatment and supplied control circuit 3 of scratching; and make control circuit 3 conductings coming disconnecting power switch K1 by tripping coil, and then realize the automatic trip of socket.
Compared with prior art, the utility model can be realized the cascade protection socket and the electrical equipment that the various size of current of institute's load do not wait is protected, and namely reaches the effect of cascade protection socket, has fail safe preferably; Simultaneously based on owing between every group of lead-out terminal and the input terminal one group of protective circuit can be set; such as the electrical appliance for 1A; can protect with the 1A protective circuit; electrical appliance for 2A; can protect with the 2A protective circuit; electrical appliance for 10A can be protected with the protective circuit of 10A, thereby has the real protection meaning, the protection good effectiveness.
Above-described embodiment and graphic and non-limiting product form of the present utility model and style, any person of an ordinary skill in the technical field all should be considered as not breaking away from patent category of the present utility model to its suitable change or modification of doing.
Claims (7)
1. socket cascade protection circuit; it is characterized in that; be arranged between every group of lead-out terminal and the input terminal to protect the electrical equipment of lead-out terminal and institute's load; allow each jack of each joint of socket that a protective circuit of setting according to the size of current of electrical appliance is arranged, this socket cascade protection circuit comprises:
Sensor circuit is responded to the over-current signal of live wire in this group lead-out terminal and is generated over-current signal voltage;
The anti-dried plastic filter circuit of scratching links to each other with sensor circuit and over-current signal voltage is resisted dried scratch shaping and filtering processing;
Control circuit has input, output and control end, and this control end links to each other with anti-dried output of scratching plastic filter circuit;
Executive circuit, has the tripping coil that is arranged on the mains switch on the live wire in this group lead-out terminal and links to each other with the output of this control circuit, the disconnection of this tripping coil control mains switch, this control circuit generates over-current signal voltage and anti-dried scratching drives executive circuit action disconnecting power switch when the plastic filter circuit output voltage meets or exceeds the threshold values of control circuit at sensor circuit.
2. a kind of socket cascade protection circuit according to claim 1; it is characterized in that; described socket cascade protection circuit also comprises power circuit; this power circuit is the bridge rectifier that links to each other with this group lead-out terminal, and the input of this power circuit and control circuit, output and executive circuit form a current supply circuit.
3. a kind of socket cascade protection circuit according to claim 1 is characterized in that, described sensor circuit is for responding to first inductance coil of the over-current signal of live wire in this group output.
4. a kind of socket cascade protection circuit according to claim 1 is characterized in that described control circuit is controllable silicon.
5. a kind of socket cascade protection circuit according to claim 1 is characterized in that, described tripping coil is inner second inductance coil that is provided with iron core, the disconnection of this iron core and electromagnetic induction coil control mains switch.
6. a kind of socket cascade protection circuit according to claim 1; it is characterized in that; described socket cascade protection circuit also comprises first trimmer potentiometer and second trimmer potentiometer that is arranged on the control circuit front end, and this second trimmer potentiometer has the electric current dial.
7. a kind of socket cascade protection circuit according to claim 1 is characterized in that, socket cascade protection circuit also comprise current-limiting resistance and can be when temperature surpasses default definite value the automatic disconnection source, this current-limiting resistance also links to each other with the control end of control circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220685475 CN203180483U (en) | 2012-12-13 | 2012-12-13 | Cascade protection circuit for extension socket |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220685475 CN203180483U (en) | 2012-12-13 | 2012-12-13 | Cascade protection circuit for extension socket |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203180483U true CN203180483U (en) | 2013-09-04 |
Family
ID=49077143
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220685475 Expired - Fee Related CN203180483U (en) | 2012-12-13 | 2012-12-13 | Cascade protection circuit for extension socket |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203180483U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103001173A (en) * | 2012-12-13 | 2013-03-27 | 福一开电气有限公司 | Cascade protection circuit for extension socket |
| CN105226602A (en) * | 2015-10-26 | 2016-01-06 | 成都辰来科技有限公司 | A kind of supply module avoiding surge current to disturb for fpga chip |
-
2012
- 2012-12-13 CN CN 201220685475 patent/CN203180483U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103001173A (en) * | 2012-12-13 | 2013-03-27 | 福一开电气有限公司 | Cascade protection circuit for extension socket |
| CN105226602A (en) * | 2015-10-26 | 2016-01-06 | 成都辰来科技有限公司 | A kind of supply module avoiding surge current to disturb for fpga chip |
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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 |
Granted publication date: 20130904 Termination date: 20201213 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |