CN212063484U - Timing circuit breaker with over-voltage and under-voltage protection - Google Patents
Timing circuit breaker with over-voltage and under-voltage protection Download PDFInfo
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- CN212063484U CN212063484U CN202021091787.4U CN202021091787U CN212063484U CN 212063484 U CN212063484 U CN 212063484U CN 202021091787 U CN202021091787 U CN 202021091787U CN 212063484 U CN212063484 U CN 212063484U
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Abstract
The utility model discloses a timing circuit breaker with over-voltage and under-voltage protection, which comprises a tripping device for executing tripping action when over-voltage and under-voltage occur, and a timing module connected to a loop connected with a load; the timing module comprises a rectification voltage reduction circuit, a timing circuit, a detection circuit and a control circuit, wherein the rectification voltage reduction circuit comprises a rectifier bridge BD1 and a voltage reduction resistor; the timing circuit comprises a control chip U1, a display screen LCD connected with the control chip U1 and a plurality of key switches for setting time by pressing; the detection circuit is connected with the rectification voltage reduction circuit and the enabling end of the control chip U1; the control circuit comprises a thyristor Q1, the thyristor Q1 is connected in series in a loop connected with a load, and the enabling end of the control chip U1 is connected with the control electrode of the thyristor Q1 so as to control the on/off of the thyristor Q1. The utility model has the advantages of it is following and effect: the utility model discloses can realize cutting off the timing of load, it is safer and the circuit is simple to use.
Description
Technical Field
The utility model relates to a circuit breaker technical field, in particular to timing circuit breaker with cross undervoltage protection.
Background
The circuit breaker is a switching device capable of closing, carrying, and opening/closing a current under a normal circuit condition and a current under an abnormal circuit condition within a prescribed time.
The existing circuit breaker has the following problems: 1. the load is not provided with a timing function, the load cannot be automatically cut off after running for a specified time, and the load needs to be manually cut off by a user, so that the load is troublesome, and the situation that the user forgets to cut off the load occurs, and some unnecessary troubles are easy to generate. 2. The existing circuit breaker generally controls the circuit of the load to be switched on/off by connecting a triode or a field effect transistor; however, the voltage resistance of the triode or the field effect transistor is low, and the triode or the field effect transistor is easily burnt out due to the voltage fluctuation phenomenon of the alternating voltage of the mains supply, so that potential safety hazards exist. 3. The existing circuit breaker also has the defect of complex circuit.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a timing circuit breaker with cross undervoltage protection to solve the problem that proposes in the background art.
The above technical purpose of the present invention can be achieved by the following technical solutions: a timing circuit breaker with overvoltage and undervoltage protection comprises a tripping device for executing tripping action when overvoltage and undervoltage occur, and a timing module connected to a loop connected with a load; the timing module comprises a rectification voltage reduction circuit, a timing circuit, a detection circuit and a control circuit, wherein the rectification voltage reduction circuit comprises a rectifier bridge BD1 and a voltage reduction resistor, the rectifier bridge BD1 is powered by mains supply and rectifies input voltage of the mains supply and outputs the rectified voltage to the voltage reduction resistor for voltage reduction so as to obtain power supply voltage for supplying power to the timing circuit; the timing circuit comprises a control chip U1, a display screen LCD connected with the control chip U1 and a plurality of key switches for setting time by pressing; the detection circuit is connected with the rectification voltage reduction circuit to obtain a real-time voltage value, and is connected with an enabling end of the control chip U1; the control circuit comprises a thyristor Q1, the thyristor Q1 is connected in series in a loop connected with a load, and the enabling end of the control chip U1 is connected with the control electrode of the thyristor Q1 so as to control the on/off of the thyristor Q1.
The further setting is that: the rectifying and voltage-reducing circuit further comprises a thermistor R1, a capacitor C1, a capacitor C2, a diode D1, a diode D2 and a voltage-stabilizing tube D3, the voltage-reducing resistor comprises a resistor R2 and a resistor R3, the thermistor R1 is connected between a mains supply and a power supply loop of a rectifier bridge BD1, one output end of the rectifier bridge BD1 is grounded, the other output end of the rectifier bridge BD1 is connected with the anode of the diode D1, the cathode of the diode D1 is connected with one end of a resistor R2, the other end of a resistor R2 is connected with the anode of the capacitor C1 and one end of a resistor R3, the cathode of the capacitor C1 is grounded, the other end of the resistor R3 is connected with the cathode of a voltage-stabilizing tube D3, the anode of the diode D2 and the anode of the capacitor C2, the anode of the voltage-stabilizing tube D2 and the cathode of the capacitor C2 are both grounded, and the cathode.
The further setting is that: and each key switch in the timing circuit is respectively connected with different enabling ends of the control chip U1.
The further setting is that: the detection circuit comprises a resistor R4, a resistor R5 and a resistor R6, wherein one end of the resistor R4 is connected with the anode of the diode D1, the other end of the resistor R4 is connected with one end of the resistor R5, the other end of the resistor R5 is connected with the enabling end of the control chip U1 and one end of the resistor R6, and the other end of the resistor R6 is grounded.
The further setting is that: the battery BT1 and the diode D4 are further included, the negative electrode of the battery BT1 is grounded, the positive electrode of the battery BT1 is connected with the positive electrode of the diode D4, and the negative electrode of the diode D4 is connected with the negative electrode of the diode D2.
The beneficial effects of the utility model reside in that:
1. the utility model discloses in through setting up control chip U1, display screen LCD and key switch, but dynamic free set time, and when the set time arrived, realize cutting off of load through silicon controlled Q1, need not the manual load that cuts off of user, it is more convenient in actual use, and silicon controlled Q1 has the advantage of high withstand voltage, it is difficult to burn out under the voltage fluctuation of commercial power, thereby effectively ensure the operational reliability of whole circuit, and long service life. And once the thyristor Q1 is conducted, the conduction state is kept constantly under the condition that the source voltage does not disappear, so that the conduction of the loop is more stable.
2. The utility model discloses a circuit design is simple reasonable, and used electronic component figure is few, paster and weldment work when convenient production, effective reduction in production cost.
3. The utility model discloses in set up thermistor R1 and play the guard action, step down through resistance R2 and resistance R3 to carry out the partial pressure through setting up resistance R4, resistance R5 and resistance R6, thereby realize the real-time supervision of voltage.
4. The utility model discloses in realize still can be to the purpose of timing circuit's power supply when the commercial power cuts off through setting up battery BT1 to light display screen LCD and come the settlement time, more reasonable hommization.
Drawings
Fig. 1 is a circuit diagram of an embodiment.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Referring to fig. 1, a timing circuit breaker with overvoltage and undervoltage protection includes a tripping device for executing tripping action when overvoltage and undervoltage occur. The tripping device belongs to the conventional structure of the circuit breaker, and an electronic tripping device, an electromagnetic tripping device and the like are available on the market and are not described herein.
Also included is a timing module coupled to a loop coupled to the load.
Specifically, the timing module comprises a rectification voltage reduction circuit, a timing circuit, a detection circuit and a control circuit, wherein the rectification voltage reduction circuit comprises a rectifier bridge BD1 and a voltage reduction resistor, the rectifier bridge BD1 is powered by mains supply, and rectifies the input voltage of the mains supply and outputs the rectified voltage to the voltage reduction resistor for voltage reduction so as to obtain the power supply voltage for supplying power to the timing circuit;
the timing circuit comprises a control chip U1, a display screen LCD connected with the control chip U1 and a plurality of key switches for setting time by pressing;
the detection circuit is connected with the rectification voltage reduction circuit to obtain a real-time voltage value, and is connected with an enabling end of the control chip U1;
the control circuit comprises a thyristor Q1, a thyristor Q1 is connected in series in a loop connected with a load, and the enabling end of the control chip U1 is connected with the control electrode of the thyristor Q1 so as to control the on/off of the thyristor Q1.
It should be noted that the model of the rectifier bridge BD1 may be MB6S, the model of the display screen LCD may be LCD1602, and the key switches are designated as S1 to S9 in fig. 1, and may be touch switches; the model of the control chip U1 can adopt pic16F74, and the model of the controllable silicon Q1 can adopt MCR 100-6.
More specifically, the specific circuit diagram structure of this embodiment is:
the rectifying and voltage reducing circuit further comprises a thermistor R1, a capacitor C1, a capacitor C2, a diode D1, a diode D2 and a voltage regulator tube D3, the voltage reducing resistor comprises a resistor R2 and a resistor R3, the thermistor R1 is connected between a mains supply and a power supply loop of a rectifier bridge BD1, one output end of the rectifier bridge BD1 is grounded, the other output end of the rectifier bridge BD1 is connected with the anode of the diode D1, the cathode of the diode D1 is connected with one end of a resistor R2, the other end of a resistor R2 is connected with the anode of a capacitor C1 and one end of a resistor R3, the cathode of a capacitor C1 is grounded, the other end of the resistor R3 is connected with the cathode of a voltage regulator tube D3, the anode of a diode D2 and the anode of the capacitor C2, the anode of the voltage regulator tube D2 and the cathode of the capacitor C2 are both grounded, and the cathode of.
The key switches in the timing circuit are respectively connected with different enabling ends of the control chip U1, and the display screen LCD is also connected with different enabling ends of the control chip U1.
The detection circuit comprises a resistor R4, a resistor R5 and a resistor R6, wherein one end of the resistor R4 is connected with the anode of the diode D1, the other end of the resistor R4 is connected with one end of the resistor R5, the other end of the resistor R5 is connected with the enabling end of the control chip U1 and one end of the resistor R6, and the other end of the resistor R6 is grounded.
The battery BT1 and the diode D4 are further included, the negative electrode of the battery BT1 is grounded, the positive electrode of the battery BT1 is connected with the positive electrode of the diode D4, and the negative electrode of the diode D4 is connected with the negative electrode of the diode D2.
Detailed and implementable circuit diagrams are disclosed in fig. 1, and should be understood by a person skilled in the art.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications to the present embodiment without inventive contribution as required after reading the present specification, but all of them are protected by patent laws within the scope of the claims of the present invention.
Claims (5)
1. The utility model provides a timing circuit breaker with cross undervoltage protection, is including taking place to cross the trip gear of undervoltage time execution tripping action, its characterized in that:
the system also comprises a timing module connected to a loop connected with the load;
the timing module comprises a rectification voltage reduction circuit, a timing circuit, a detection circuit and a control circuit, wherein the rectification voltage reduction circuit comprises a rectifier bridge BD1 and a voltage reduction resistor, the rectifier bridge BD1 is powered by mains supply and rectifies input voltage of the mains supply and outputs the rectified voltage to the voltage reduction resistor for voltage reduction so as to obtain power supply voltage for supplying power to the timing circuit;
the timing circuit comprises a control chip U1, a display screen LCD connected with the control chip U1 and a plurality of key switches for setting time by pressing;
the detection circuit is connected with the rectification voltage reduction circuit to obtain a real-time voltage value, and is connected with an enabling end of the control chip U1;
the control circuit comprises a thyristor Q1, the thyristor Q1 is connected in series in a loop connected with a load, and the enabling end of the control chip U1 is connected with the control electrode of the thyristor Q1 so as to control the on/off of the thyristor Q1.
2. A timed circuit breaker with overvoltage and undervoltage protection according to claim 1, characterized in that: the rectifying and voltage-reducing circuit further comprises a thermistor R1, a capacitor C1, a capacitor C2, a diode D1, a diode D2 and a voltage-stabilizing tube D3, the voltage-reducing resistor comprises a resistor R2 and a resistor R3, the thermistor R1 is connected between a mains supply and a power supply loop of a rectifier bridge BD1, one output end of the rectifier bridge BD1 is grounded, the other output end of the rectifier bridge BD1 is connected with the anode of the diode D1, the cathode of the diode D1 is connected with one end of a resistor R2, the other end of a resistor R2 is connected with the anode of the capacitor C1 and one end of a resistor R3, the cathode of the capacitor C1 is grounded, the other end of the resistor R3 is connected with the cathode of a voltage-stabilizing tube D3, the anode of the diode D2 and the anode of the capacitor C2, the anode of the voltage-stabilizing tube D2 and the cathode of the capacitor C2 are both grounded, and the cathode.
3. A timed circuit breaker with overvoltage and undervoltage protection according to claim 1, characterized in that: and each key switch in the timing circuit is respectively connected with different enabling ends of the control chip U1.
4. A timed circuit breaker with overvoltage and undervoltage protection according to claim 1, characterized in that: the detection circuit comprises a resistor R4, a resistor R5 and a resistor R6, wherein one end of the resistor R4 is connected with the anode of the diode D1, the other end of the resistor R4 is connected with one end of the resistor R5, the other end of the resistor R5 is connected with the enabling end of the control chip U1 and one end of the resistor R6, and the other end of the resistor R6 is grounded.
5. A timed circuit breaker with overvoltage and undervoltage protection according to claim 1, characterized in that: the battery BT1 and the diode D4 are further included, the negative electrode of the battery BT1 is grounded, the positive electrode of the battery BT1 is connected with the positive electrode of the diode D4, and the negative electrode of the diode D4 is connected with the negative electrode of the diode D2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021091787.4U CN212063484U (en) | 2020-06-12 | 2020-06-12 | Timing circuit breaker with over-voltage and under-voltage protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021091787.4U CN212063484U (en) | 2020-06-12 | 2020-06-12 | Timing circuit breaker with over-voltage and under-voltage protection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212063484U true CN212063484U (en) | 2020-12-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021091787.4U Active CN212063484U (en) | 2020-06-12 | 2020-06-12 | Timing circuit breaker with over-voltage and under-voltage protection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212063484U (en) |
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2020
- 2020-06-12 CN CN202021091787.4U patent/CN212063484U/en active Active
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