CN204886124U - Prevent overload protection switching device - Google Patents

Prevent overload protection switching device Download PDF

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Publication number
CN204886124U
CN204886124U CN201520548771.4U CN201520548771U CN204886124U CN 204886124 U CN204886124 U CN 204886124U CN 201520548771 U CN201520548771 U CN 201520548771U CN 204886124 U CN204886124 U CN 204886124U
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input
resistance
electronic switch
connects
current
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CN201520548771.4U
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Chinese (zh)
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祝振卿
葛剑优
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FUYIKAI ELECTRICAL Co Ltd
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FUYIKAI ELECTRICAL Co Ltd
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Abstract

Prevent overload protection switching device is including current transformer L3, zener diode D6, potentiometre RP1, resistance R2, diode D7, electronic switch Q1, filter capacitance C4, bridge type rectifier circuit and electromagnetic relay, zener diode D6 and current sensor L3 are parallelly connected, stabilivolt D6's positive pole is connected to potentiometre RP1's adjustable end, zener diode D6's negative pole passes through the positive pole that current -limiting resistor R2 connects diode D7, and diode D7's negative pole passes through electric capacity C4 ground connection, still connects electronic switch Q1's control end, bridge type rectifier circuit's output, output ground connection are connected to electronic switch Q1's input, zero line N is connected to bridge type rectifier circuit's first input end, and the coil L5 that the second input passes through electromagnetic relay 20 connects live wire L, electromagnetic relay's contact difference series connection in live wire L and zero line N. The utility model is suitable for a transship overcurrent protection to various rated power's domestic appliance, the reaction is rapidly in time almost detecting to overflow and is making the reaction of opening circuit constantly in the twinkling of an eye.

Description

Antioverloading protection switch device
Technical field
The utility model relates to a kind of antioverloading protection switch device.
Background technology
If household electrical appliance adopt regular tap, when transshipping for a certain reason, because regular tap does not possess automatic circuit break function, easily heating is on fire, even burns.At present; total lock adopts 10A-20A miniature circuit breaker mostly; existing small-sized disconnected device is by bimetal leaf; electrified regulation, flexural deformation deenergization; if overcurrent does not exceed miniature circuit breaker total current; it will not trip, often have burn out electrical appliance, the phenomenon that causes fire occurs, and rated current cannot be protected to be the small household appliance of below 1A.
Utility model content
For the deficiencies in the prior art, be of the present utility modelly intended to provide a kind of antioverloading protection switch device solved the problems of the technologies described above.
For achieving the above object, the utility model adopts following technical scheme:
A kind of antioverloading protection switch device, it comprises current transformer L3, voltage stabilizing didoe D6, potentiometer RP1, resistance R2, diode D7, electronic switch Q1, filter capacitor C4, bridge rectifier and electromagnetic relay;
Current transformer L3 is for detecting the electric current of live wire L; Voltage stabilizing didoe D6 and current sensor L3 is connected in parallel; The neither moved end of potentiometer RP1 is in parallel with voltage stabilizing didoe D6, and the adjustable end of potentiometer RP1 connects the anode of voltage-stabiliser tube D6; The negative electrode of voltage stabilizing didoe D6 connects the anode of diode D7 by current-limiting resistance R2, the negative electrode of diode D7, by filter capacitor C4 ground connection, also connects the control end of electronic switch Q1; The input of electronic switch Q1 connects the output of bridge rectifier, the output head grounding of electronic switch Q1; The first input end of bridge rectifier connects zero line N, and the second input connects live wire L by the coil L5 of electromagnetic relay, and the contact of electromagnetic relay is connected in series in live wire L and zero line N respectively; Wherein, when the control end of electronic switch Q1 receives high level signal, conducting between the input of electronic switch Q1 and output; When the control end of electronic switch Q1 receives low level signal, the input of electronic switch Q1 and the separated of output.
Preferably, this electronic switch is controllable silicon.
Preferably, an electric capacity C6 is also connected between the adjustable end of potentiometer RP1 and the negative electrode of voltage stabilizing didoe D6.
Preferably, antioverloading protection switch device also comprises zero-sequence transformer L1, voltage stabilizing didoe D1, controller U1 and electric capacity C1; Zero-sequence transformer L1 is for detecting the leakage current of live wire L; Voltage stabilizing didoe D1 is in parallel with the two ends of zero-sequence transformer L1 and is connected, and the negative electrode of voltage stabilizing didoe D1 passes through the first input end of electric capacity C1 connection control device U1, second input of the anode connection control device U1 of voltage stabilizing didoe D1; The output of controller U1 connects the control end of electronic switch Q1; When zero-sequence transformer L1 detects the leakage current of live wire L, controller U1 sends the control end of high level signal to electronic switch Q1.
Preferably, antioverloading protection switch device also comprises current transformer L2, electric capacity C3 and electric capacity C2; Current transformer L2 is for detecting the leakage current of zero line N; Electric capacity C3 is in parallel with the two ends of current transformer L2 and is connected, and the 3rd input of controller U1 connects one end of current transformer L2, the other end ground connection of current transformer L2 by electric capacity C2; When current transformer L2 detects the leakage current of zero line N, controller U1 sends the control end of high level signal to electronic switch Q1.
Preferably, a resistance R2 is connected between the first input end of controller U1 and the 3rd input.
Preferably, the output of bridge rectifier is also successively by resistance R3 and electric capacity C5 ground connection.
Preferably, antioverloading protection switch device also comprises button S1, resistance RV2, resistance R1, resistance RV1, resistance R9 and light-emitting diode D1; The negative electrode of light-emitting diode D1 connects live wire L, and the anode of light-emitting diode D1 is by connecting the output of zero line N by resistance R9; One end of button S1 is connected the input of zero line N successively with resistance RV1 by resistance R1, the other end of button S1 connects the output of zero line N, and resistance RV2 is connected in parallel in the two ends of button S1.
The beneficial effects of the utility model at least comprise following some:
When load is due to overload flow, current transformer L3 senses the electric current of live wire L in real time, voltage stabilizing didoe D6 by the both end voltage voltage stabilizing of current transformer L3 in about a fixed voltage, current sample is carried out by potentiometer RP1, current limliting is carried out again by resistance R2, when sampled voltage exceedes the conducting voltage of diode D7, diode D7 conducting, and then send the control end of high level signal to electronic switch Q1, to make conducting between the input of electronic switch Q1 and output, thus make the loop conducting of bridge rectifier place, the coil L5 of electromagnetic relay obtains electric, and then disconnect live wire L and zero line N respectively, load is avoided to damage due to overcurrent, be swift in response in time, almost detecting that overcurrent time instances makes open circuit reaction, in addition, sampled by potentiometer RP1, the utility model can be made to be adapted to the household electrical appliance of various rated power, the resistance by regulator potentiometer RP1 carrys out the household electrical appliance of corresponding protection high nominal powers or small rated power, moreover, completed over-current detection by current transformer L3, voltage stabilizing didoe D6, potentiometer RP1 and diode D7 collaborate and sent cut-off signal, participating in without the need to software, more reliable and stable, and be quick on the draw.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of the better embodiment of the utility model antioverloading protection switch device.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the utility model is described further:
Refer to 1; the utility model relates to a kind of antioverloading protection switch device, and its better embodiment comprises current transformer L3, voltage stabilizing didoe D6, potentiometer RP1, resistance R2, diode D7, electronic switch Q1, filter capacitor C4, bridge rectifier 10 and electromagnetic relay 20.
Current transformer L3 is for detecting the electric current of live wire L; Voltage stabilizing didoe D6 and current sensor L3 is connected in parallel; The neither moved end of potentiometer RP1 is in parallel with voltage stabilizing didoe D6, and the adjustable end of potentiometer RP1 connects the anode of voltage-stabiliser tube D6; The negative electrode of voltage stabilizing didoe D6 connects the anode of diode D7 by current-limiting resistance R2, the negative electrode of diode D7, by filter capacitor C4 ground connection, also connects the control end of electronic switch Q1; The input of electronic switch Q1 connects the output 2 of bridge rectifier 10, the output head grounding of electronic switch Q1; The first input end 3 of bridge rectifier 10 connects zero line N, and the second input 1 connects live wire L by the coil L5 of electromagnetic relay 20, and the contact of electromagnetic relay 20 is connected in series in live wire L and zero line N respectively.
When load is due to overload flow, current transformer L3 senses the electric current of live wire L in real time, voltage stabilizing didoe D6 by the both end voltage voltage stabilizing of current transformer L3 in a fixed voltage as about 2V, current sample is carried out by potentiometer RP1, current limliting is carried out again by resistance R2, when the conducting voltage that sampled voltage exceedes diode D7 is as 0.7V, diode D7 conducting, and then send the control end of high level signal to electronic switch Q1, to make conducting between the input of electronic switch Q1 and output, thus make the loop conducting of bridge rectifier 10 place, the coil L5 of electromagnetic relay 20 obtains electric, and then disconnect live wire L and zero line N respectively, load is avoided to damage due to overcurrent, be swift in response in time, almost detecting that overcurrent time instances makes open circuit reaction, in addition, sampled by potentiometer RP1, the utility model can be made to be adapted to the household electrical appliance of various rated power, the next corresponding protection high nominal powers of the resistance by regulator potentiometer RP1 or small rated power are as the household electrical appliance of below 1A, moreover, completed over-current detection by current transformer L3, voltage stabilizing didoe D6, potentiometer RP1 and diode D7 collaborate and sent cut-off signal, participating in without the need to software, more reliable and stable, and be quick on the draw.
When load current recovers normal, sampled voltage, lower than the conducting voltage of diode D7, makes the input of electronic switch Q1 and the separated of output, and then loop, bridge rectifier 10 place is disconnected, thus make the coil losing electricity of electromagnetic relay 20, its closing of contact, thus make live wire L and zero line L conducting respectively, load continues normal work, so, can automatically recover load supplying loop, without the need to manual reset operation, very convenient safe and efficient.
Preferably, this electronic switch Q1 is controllable silicon.
Preferably, an electric capacity C6 is also connected between the adjustable end of potentiometer RP1 and the negative electrode of voltage stabilizing didoe D6.
Between live wire L and zero line N during short circuit, the coil of electromagnetic relay 20 instantaneously electric, thus moment break contact, with disconnecting consumers current supply circuit, avoid load to burn due to short circuit overcurrent.
In the present embodiment, antioverloading protection switch device also comprises zero-sequence transformer L1, voltage stabilizing didoe D1, controller U1 and electric capacity C1;
Zero-sequence transformer L1 is for detecting the leakage current of live wire L; Voltage stabilizing didoe D1 is in parallel with the two ends of zero-sequence transformer L1 and is connected, and the negative electrode of voltage stabilizing didoe D1 passes through the first input end of electric capacity C1 connection control device U1, second input of the anode connection control device U1 of voltage stabilizing didoe D1; The output of controller U1 connects the control end of electronic switch Q1; When zero-sequence transformer L1 detects the leakage current of live wire L; namely controller U1 sends the control end of high level signal to electronic switch Q1; make electronic switch Q1 conducting; thus the contact of electromagnetic relay 20 is disconnected; and then disconnecting consumers current supply circuit; so, the earth leakage protective in load supplying loop can be realized.
In the present embodiment, antioverloading protection switch device also comprises current transformer L2, electric capacity C3 and electric capacity C2; Current transformer L2 is for detecting the leakage current of zero line N; Electric capacity C3 is in parallel with the two ends of current transformer L2 and is connected, and the 3rd input of controller U1 connects one end of current transformer L2, the other end ground connection of current transformer L2 by electric capacity C2; When current transformer L2 detects the leakage current of zero line N; namely controller U1 sends the control end of high level signal to electronic switch Q1; make electronic switch Q1 conducting; thus the contact of electromagnetic relay 20 is disconnected; and then disconnecting consumers current supply circuit, so, the earth leakage protective in load supplying loop can be realized; electric leakage monitoring is carried out to zero line N and live wire L, safety and reliability simultaneously.
Preferably, a resistance R2 is connected between the first input end of controller U1 and the 3rd input.
Preferably, the output of bridge rectifier 10 is also successively by resistance R3 and electric capacity C5 ground connection.
In the present embodiment, antioverloading protection switch device also comprises button S1, resistance RV2, resistance R1, resistance RV1, resistance R9 and light-emitting diode D1; The negative electrode of light-emitting diode D1 connects live wire L, and the anode of light-emitting diode D1 is by connecting the output of zero line N by resistance R9; One end of button S1 is connected the input of zero line N successively with resistance RV1 by resistance R1, the other end of button S1 connects the output of zero line N, and resistance RV2 is connected in parallel in the two ends of button S1;
When needing overcurrent or the short-circuit protection function detecting this device, carry out detection test by conducting button S1.
Wherein, resistance RV2 is used for overvoltage protection.
For a person skilled in the art, according to technical scheme described above and design, other various corresponding change and distortion can be made, and all these change and distortion all should belong within the protection range of the utility model claim.

Claims (8)

1. an antioverloading protection switch device, is characterized in that: it comprises current transformer L3, voltage stabilizing didoe D6, potentiometer RP1, resistance R2, diode D7, electronic switch Q1, filter capacitor C4, bridge rectifier and electromagnetic relay;
Current transformer L3 is for detecting the electric current of live wire L; Voltage stabilizing didoe D6 and current sensor L3 is connected in parallel; The neither moved end of potentiometer RP1 is in parallel with voltage stabilizing didoe D6, and the adjustable end of potentiometer RP1 connects the anode of voltage-stabiliser tube D6; The negative electrode of voltage stabilizing didoe D6 connects the anode of diode D7 by current-limiting resistance R2, the negative electrode of diode D7, by filter capacitor C4 ground connection, also connects the control end of electronic switch Q1; The input of electronic switch Q1 connects the output of bridge rectifier, the output head grounding of electronic switch Q1; The first input end of bridge rectifier connects zero line N, and the second input connects live wire L by the coil L5 of electromagnetic relay, and the contact of electromagnetic relay is connected in series in live wire L and zero line N respectively; Wherein, when the control end of electronic switch Q1 receives high level signal, conducting between the input of electronic switch Q1 and output; When the control end of electronic switch Q1 receives low level signal, the input of electronic switch Q1 and the separated of output.
2. antioverloading protection switch device as claimed in claim 1, is characterized in that: this electronic switch is controllable silicon.
3. antioverloading protection switch device as claimed in claim 1, is characterized in that: also connect an electric capacity C6 between the adjustable end of potentiometer RP1 and the negative electrode of voltage stabilizing didoe D6.
4. antioverloading protection switch device as claimed any one in claims 1 to 3, is characterized in that: antioverloading protection switch device also comprises zero-sequence transformer L1, voltage stabilizing didoe D1, controller U1 and electric capacity C1; Zero-sequence transformer L1 is for detecting the leakage current of live wire L; Voltage stabilizing didoe D1 is in parallel with the two ends of zero-sequence transformer L1 and is connected, and the negative electrode of voltage stabilizing didoe D1 passes through the first input end of electric capacity C1 connection control device U1, second input of the anode connection control device U1 of voltage stabilizing didoe D1; The output of controller U1 connects the control end of electronic switch Q1; When zero-sequence transformer L1 detects the leakage current of live wire L, controller U1 sends the control end of high level signal to electronic switch Q1.
5. antioverloading protection switch device as claimed in claim 4, is characterized in that: antioverloading protection switch device also comprises current transformer L2, electric capacity C3 and electric capacity C2; Current transformer L2 is for detecting the leakage current of zero line N; Electric capacity C3 is in parallel with the two ends of current transformer L2 and is connected, and the 3rd input of controller U1 connects one end of current transformer L2, the other end ground connection of current transformer L2 by electric capacity C2; When current transformer L2 detects the leakage current of zero line N, controller U1 sends the control end of high level signal to electronic switch Q1.
6. antioverloading protection switch device as claimed in claim 5, is characterized in that: connect a resistance R2 between the first input end of controller U1 and the 3rd input.
7. antioverloading protection switch device as claimed in claim 1, is characterized in that: the output of bridge rectifier is also successively by resistance R3 and electric capacity C5 ground connection.
8. antioverloading protection switch device as claimed in claim 1, is characterized in that: antioverloading protection switch device also comprises button S1, resistance RV2, resistance R1, resistance RV1, resistance R9 and light-emitting diode D1; The negative electrode of light-emitting diode D1 connects live wire L, and the anode of light-emitting diode D1 is by connecting the output of zero line N by resistance R9; One end of button S1 is connected the input of zero line N successively with resistance RV1 by resistance R1, the other end of button S1 connects the output of zero line N, and resistance RV2 is connected in parallel in the two ends of button S1.
CN201520548771.4U 2015-07-27 2015-07-27 Prevent overload protection switching device Active CN204886124U (en)

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Application Number Priority Date Filing Date Title
CN201520548771.4U CN204886124U (en) 2015-07-27 2015-07-27 Prevent overload protection switching device

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CN201520548771.4U CN204886124U (en) 2015-07-27 2015-07-27 Prevent overload protection switching device

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104953537A (en) * 2015-07-27 2015-09-30 福一开电气有限公司 Overload protection switching device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104953537A (en) * 2015-07-27 2015-09-30 福一开电气有限公司 Overload protection switching device

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