CN201726097U - Circuit breaker capable of detecting and controlling electric current change - Google Patents
Circuit breaker capable of detecting and controlling electric current change Download PDFInfo
- Publication number
- CN201726097U CN201726097U CN2009200570349U CN200920057034U CN201726097U CN 201726097 U CN201726097 U CN 201726097U CN 2009200570349 U CN2009200570349 U CN 2009200570349U CN 200920057034 U CN200920057034 U CN 200920057034U CN 201726097 U CN201726097 U CN 201726097U
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- circuit
- electric current
- circuit breaker
- mpu
- chip microcomputer
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Abstract
The utility model relates to a circuit breaker capable of detecting and controlling electric current change. A current transformer, a rectifier filter, an MPU (Micro-Processor Unit) single-chip, an AC contactor, an audible and visual alarm device, a device for setting break electric current value and a device for setting electric current increase break value are connected with one another in an insulated housing of the circuit breaker. The circuit breaker capable of detecting and controlling electric current change not only can set break electric current and added value of electric current of the circuit breaker, but also perform break control to a circuit when the electric current inside the circuit and the added value of the electric current exceed the set value.
Description
Affiliated technical field
The utility model relates to low-voltage circuit control field, and particularly a kind of circuit breaker with electric current change-detection and controlled function especially can be discerned and control when not wishing that the electric current that takes place increases, and circuit is cut off.
Background technology
Present low-voltage circuit breaker in the time of only meeting or exceeding the current value of its qualification to current value in the circuit, is carried out the control of opening circuit to circuit, and the current value of its qualification is just determined when producing, in use can not be set as required by the user.When occurring undesirable electric current in the circuit and increase, but the total current value of circuit is during again less than the current limit of circuit breaker, and circuit breaker is not carry out the control of opening circuit, and at this moment just can cause the unwanted results generation.
Summary of the invention
In order to overcome the deficiency of existing circuit breaker, the utility model provides a kind of circuit breaker with electric current change-detection and controlled function, and this circuit breaker can carry out the setting of breaking current, can identification circuit in the size that changes of electric current; When the size of total current in the circuit or electric current variation surpasses predefined value, can carry out the control of opening circuit to circuit.
The technical scheme that its technical problem that solves the utility model adopts is: in insulation crust, circuit input, output splicing ear, current transformer, rectifier filter, MPU single-chip microcomputer, A.C. contactor, optoacoustic warning device, opening amperage setting device, the electric current increase value setting device that opens circuit is connected; It is characterized in that: the output of current transformer inserts an inverting input of rectifier filter integrated circuit (IC) 2, the forward output of IC2, opening amperage setting device data output end, the electric current increase value setting device data output end that opens circuit is received P1.0, P1.1, the P1.2 pin of IC1MPU respectively; The P3.1 of IC1MPU, P1.7 pin as output be connected respectively to light, acoustic alarm control triode T1, T2 make warning device work, the P1.7 pin is also connected to the bidirectional triode thyristor circuits for triggering, with control A.C. contactor DC work, realizes the control of opening circuit.
The beneficial effects of the utility model are, when the size that occurs electric current in undesirable electric current recruitment or the circuit in circuit met or exceeded predefined value, open circuit prevented unexpected situation generation rapidly; Each unit adopts ripe components and parts, and is safe and reliable.
Description of drawings
Below in conjunction with accompanying drawing the utility model is further specified.
Fig. 1 is a circuit block diagram of the present utility model.
Fig. 2 is circuit theory diagrams of the present utility model.
Embodiment
In Fig. 1 and Fig. 2, circuit is connected on the normally-closed contact of A.C. contactor DC, and the actuating coil of DC is received on 220 alternating currents by a two-way controllable silicon KG; The output of current transformer inserts an inverting input of rectifier filter integrated circuit (IC) 2, the forward output of IC2, breaking current maximum setting device output, the electric current increase value setting device output that opens circuit is received P1.0, P1.1, the P1.2 pin of IC1MPU respectively; The P3.1 of IC1MPU, P1.7 pin as output be connected respectively to light, acoustic alarm control triode T1, T2 make warning device work, the P1.7 pin is also connected to bidirectional triode thyristor circuits for triggering IC3, the output of IC3 inserts the control pin of bidirectional triode thyristor KG, with control A.C. contactor DC work, realize the control of opening circuit.The VDC assembly is used for alternating current 220V is transformed to direct current, uses for each device in the circuit breaker.
Its operation principle is
In Fig. 1, it is I that current transformer LH induces circuital current, draws the corresponding voltage V with I behind rectifier filter, and MPU regularly reads and preserve the output voltage signal V of rectifier filter.When the circuit operate as normal, MPU compares the output voltage signal Vn and the predefined circuital current limit value of the rectifier filter that per moment reads; When Vn was worth greater than this, the output control signal made A.C. contactor work cut off circuit and acoustic-optic alarm is reported to the police.The open circuit operation principle of control of circuital current increase is: t1 constantly current transformer LH to induce electric current be I1, behind rectifier filter a voltage V1; Inducing electric current at t2 moment current transformer LH is I2, gets a voltage V2 behind rectifier filter.MPU carries out subtraction (V2-V1)=Vo to V2 and V1, again the open circuit data of value of Vo and the circuital current increase that sets in advance are compared, as Vo during greater than predefined data, just think and occurred not wishing the electric current that increases in the circuit, MPU just exports a control signal, makes A.C. contactor work, thereby cuts off circuit, and make sound light alarming circuit work, send corresponding warning; Otherwise instead then.Because circuit is to be connected on the normally-closed contact of A.C. contactor, so when A.C. contactor was worked, normally closed point disconnected, and has so just cut off circuit.After the electric current cause of increased is eliminated, by K1 MPU is resetted, circuit enters the state of operate as normal again.
It is characterized in that: be provided with the transfer switch unit that can carry out the opening amperage setting that links to each other with the MPU single-chip microcomputer.It is characterized in that: be provided with link to each other with the MPU single-chip microcomputer can carry out the electric current increase transfer switch unit that value sets that opens circuit.
It is characterized in that: be provided with the lighting device that can report to the police that links to each other with the MPU single-chip microcomputer.
It is characterized in that: be provided with the audio unit that can report to the police that links to each other with the MPU single-chip microcomputer.
Claims (5)
1. circuit breaker with electric current change-detection and controlled function, the recruitment that surpasses electric current in predefined lowest high-current value or the circuit when the electric current in the circuit surpasses and preestablishes when filling the electric current recruitment of being permitted, can cut off circuit, it is characterized in that: in insulation crust, circuit input, output splicing ear, current transformer, rectifier filter, MPU single-chip microcomputer, A.C. contactor, optoacoustic warning device, opening amperage setting device, the electric current increase value setting device that opens circuit is connected; The output of current transformer inserts an inverting input of rectifier filter integrated circuit (IC) 2, the forward output of IC2, opening amperage setting device data output end, the electric current increase value setting device data output end that opens circuit is received P1.0, P1.1, the P1.2 pin of MPU respectively; The P3.1 of MPU, P1.7 pin as output be connected respectively to light, acoustic alarm control triode T1, T2 make warning device work, the P1.7 pin is also connected to the bidirectional triode thyristor circuits for triggering, with control A.C. contactor DC work, realizes the control of opening circuit.
2. circuit breaker according to claim 1 is characterized in that: be provided with the transfer switch unit that can carry out the opening amperage setting that links to each other with the MPU single-chip microcomputer.
3. circuit breaker according to claim 1 is characterized in that: be provided with link to each other with the MPU single-chip microcomputer can carry out the electric current increase transfer switch unit that value sets that opens circuit.
4. circuit breaker according to claim 1 is characterized in that: be provided with the lighting device that can report to the police that links to each other with the MPU single-chip microcomputer.
5. circuit breaker according to claim 1 is characterized in that: be provided with the audio unit that can report to the police that links to each other with the MPU single-chip microcomputer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200570349U CN201726097U (en) | 2009-05-16 | 2009-05-16 | Circuit breaker capable of detecting and controlling electric current change |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200570349U CN201726097U (en) | 2009-05-16 | 2009-05-16 | Circuit breaker capable of detecting and controlling electric current change |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201726097U true CN201726097U (en) | 2011-01-26 |
Family
ID=43494450
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200570349U Expired - Fee Related CN201726097U (en) | 2009-05-16 | 2009-05-16 | Circuit breaker capable of detecting and controlling electric current change |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201726097U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102385068A (en) * | 2011-10-28 | 2012-03-21 | 江西赛维Ldk太阳能多晶硅有限公司 | Silicon rod wall-collision detection device |
-
2009
- 2009-05-16 CN CN2009200570349U patent/CN201726097U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102385068A (en) * | 2011-10-28 | 2012-03-21 | 江西赛维Ldk太阳能多晶硅有限公司 | Silicon rod wall-collision detection device |
| CN102385068B (en) * | 2011-10-28 | 2014-06-18 | 江西赛维Ldk太阳能多晶硅有限公司 | Silicon rod wall-collision detection device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110126 Termination date: 20110516 |