CN202421405U - Disconnection detection module applied to flux converter of circuit breaker - Google Patents
Disconnection detection module applied to flux converter of circuit breaker Download PDFInfo
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- CN202421405U CN202421405U CN201220019870XU CN201220019870U CN202421405U CN 202421405 U CN202421405 U CN 202421405U CN 201220019870X U CN201220019870X U CN 201220019870XU CN 201220019870 U CN201220019870 U CN 201220019870U CN 202421405 U CN202421405 U CN 202421405U
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- triode
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- magnetic flow
- flow convertor
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Abstract
The utility model discloses a disconnection detection module applied to a flux converter of a circuit breaker. The disconnection detection module comprises a free-wheeling diode and a level conversion unit, wherein the free-wheeling diode is connected in parallel with a coil of the flux converter; the negative end of the free-wheeling diode is connected to a first power supply; the positive end of the free-wheeling diode is connected with the level conversion unit; the level conversion unit comprises a first resistor, a second resistor, a third resistor and a triode; one end of the first resistor is connected with the positive end of the free-wheeling diode, and the other end of the first resistor is connected to the base of the triode; and the second resistor bridges between a joint of the first resistor and the triode and the ground. Misjudgment of a micro processor, which is caused by relatively large change of voltage of the power supply of the flux converter, is avoided, so that the correctness of detecting a connection state of the flux converter is improved; and an intelligent circuit breaker is relatively safe and reliable.
Description
Technical field
The utility model relates to the circuit breaker intelligent controller field, is specifically related to a kind of burn out detection module that is applied to the isolating switch magnetic flow convertor.
Background technology
Isolating switch is one of main element in the low-voltage distribution system, plays a part very important to safety, the reliability service of low-voltage distribution system.Intelligent controller is the central component of isolating switch, and it is bearing various protections, warning, demonstration and the control function of isolating switch, is widely used in the low-voltage circuit breaker.Magnetic flow convertor is a kind of small-sized energy storage type trip gear as the dropout execution unit of intelligent controller.Under normal circumstances rely on the permanent magnet adhesive unshakable in one's determination, be in closure state; When controller sent the dropout instruction, it is oppositely excitatory that electric current passes through the coil generation, overcomes the original magnetic flux of permanent magnet, relies on reaction spring that iron core is discharged, and overcomes the friction force of connection running part and the tripping force of operating structure then, thus the promotion circuit breaker tripping.Therefore, the reliability of magnetic flow convertor work plays decisive influence to whole isolating switch performance.
In the prior art, long because of isolating switch service time, environment is complicated, magnetic flow convertor need have reliability preferably, guarantees that isolating switch reliably threads off when breaking down.When the magnetic flow convertor coil breakage or when unreliable with being connected of intelligent controller, intelligent controller detects fault-signal and sends the dropout pulse, and magnetic flow convertor can't promote circuit breaker tripping, can not protect distribution loop.Magnetic flow convertor is as passive device, and reliability depends primarily on design and manufacturing process.At present; Most of intelligent breakers all do not have the measuring ability to magnetic flow convertor; And minority has the isolating switch of magnetic flow convertor measuring ability; Its detection method mainly is that the voltage to the magnetic flow convertor negative terminal carries out directly sending into microprocessor after the dividing potential drop, monitors the state of magnetic flow convertor through the size of judging this signal, shown in accompanying drawing 1.When the magnetic flow convertor operate as normal, lead CT is with signal V
CT=R2*VCC1/ (R1+R2) sends into single-chip microcomputer, V
CTBe high level, think the magnetic flow convertor operate as normal; When the magnetic flow convertor fault, V
CTSend into single-chip microcomputer for low level, think the magnetic flow convertor fault.
The shortcoming of said method is: when the mains voltage variations of magnetic flow convertor is big; Voltage through behind the electric resistance partial pressure also changes bigger; Make the voltage signal of sending into microprocessor unstable, particularly when this voltage was in critical conditions, promptly voltage swing was the separation of microprocessor high-low level judgement; Can cause the erroneous judgement of microprocessor, thereby influence user's normal use the magnetic flow convertor state.
Summary of the invention
The utility model purpose provides a kind of burn out detection module that is applied to the isolating switch magnetic flow convertor; This burn out detection module avoid because of the mains voltage variations of magnetic flow convertor when big microprocessor erroneous judgement appears; Improve the correctness that detects the magnetic flow convertor connection status; Avoid being connected the unreliable isolating switch that causes and do not thread off, make intelligent breaker have higher safe reliability because of the magnetic flow convertor coil breakage or with intelligent controller.
For achieving the above object; The technical scheme that the utility model adopts is: a kind of burn out detection module that is applied to the isolating switch magnetic flow convertor; The burn out detection module is sent into the magnetic flow convertor coil signal that records the microprocessor of circuit breaker intelligent controller; This burn out detection module comprises fly-wheel diode and level conversion unit
Said fly-wheel diode and magnetic flow convertor coils from parallel connection of coils, the negative terminal of fly-wheel diode is connected to first power supply, and the anode of fly-wheel diode links to each other with level conversion unit;
Said level conversion unit comprises first resistance, second resistance, the 3rd resistance and triode, and an end of first resistance links to each other with the anode of fly-wheel diode, and its other end is connected to said transistor base;
The second resistance cross-over connection is between contact and ground between first resistance and the transistor base, and said the 3rd resistance is between triode and second source or ground.
Further improved technical scheme is following in the technique scheme:
1. in the such scheme, the said second resistance cross-over connection is between the emitter of contact between first resistance and the transistor base and triode ground connection, and said the 3rd resistance is between the collector of second source and triode.
2. in the such scheme, the said second resistance cross-over connection is between contact and ground between first resistance and the transistor base, and said the 3rd resistance is between the collector of ground and triode.
3. in the such scheme, said triode can be replaced by the element that plays on-off action, like metal-oxide-semiconductor.
Because the technique scheme utilization, the utility model compared with prior art has advantage and effect:
The utility model is used for the burn out detection module of isolating switch; Realized detection to magnetic flow convertor and intelligent controller connection status; Avoid being connected the unreliable isolating switch that makes and do not thread off, make intelligent breaker have higher safe reliability because of the magnetic flow convertor coil breakage or with intelligent controller; Secondly, erroneous judgement appears in microprocessor when avoiding mains voltage variations because of magnetic flow convertor big, improves the correctness that detects the magnetic flow convertor connection status.
Description of drawings
Accompanying drawing 1 is isolating switch burn out detection prior art circuits figure;
Accompanying drawing 2 is applied to the burn out detection module circuit diagram one of isolating switch for the utility model;
Accompanying drawing 3 is applied to the burn out detection module circuit diagram two of isolating switch for the utility model.
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is further described:
Embodiment one: a kind of burn out detection module that is applied to the isolating switch magnetic flow convertor shown in accompanying drawing 2, comprises fly-wheel diode, level shifting circuit.The coils from parallel connection of coils of sustained diode 1 and magnetic flow convertor, the negative terminal of sustained diode 1 links to each other with power supply VCC1, and the anode of sustained diode 1 links to each other with level shifting circuit.Level shifting circuit comprises resistance R 1, R2, R3, triode V1.One end of resistance R 1 links to each other with the anode of sustained diode 1 (FM4007), and the other end links to each other with the base stage B of triode V1 (L9013QLT1); R2 is connected across between the base stage B and ground of triode V1 (L9013QLT1), and the collector C of triode V1 links to each other with an end of resistance R 3; The other end of resistance R 3 links to each other with power supply VCC2.Power supply VCC1 and power supply VCC2 can be same power supplies, also can be different electrical power.When the magnetic flow convertor operate as normal, behind power supply VCC1 process divider resistance R1, the R2, the base stage B voltage that makes triode V1 is greater than V
BE (sat), triode V1 is in conducting state, and its collector C is a low level, sends into microprocessor, after microprocessor detects low level, through predefined program, judges the magnetic flow convertor operate as normal.When magnetic flow convertor broke, triode V1 was in cut-off state, and its collector C is a high level, sends into microprocessor, after microprocessor detects high level, through predefined program, judged the magnetic flow convertor broken string.When the power supply VCC1 of magnetic flow convertor changes greatly, need only greater than V through the voltage behind divider resistance R1, the R2
BE (sat)(being generally 0.7V); Triode V1 is in conducting state; The influence that its duty is not changed by power supply VCC1; And microprocessor is judged the state of magnetic flow convertor according to the state of triode V1, and therefore, the erroneous judgement phenomenon appears in microprocessor when avoiding mains voltage variations because of magnetic flow convertor big.
Embodiment two: a kind of burn out detection module that is applied to isolating switch shown in accompanying drawing 3, comprises fly-wheel diode, level shifting circuit.The magnetic flow convertor coil is parallelly connected with sustained diode 1, and the negative terminal of sustained diode 1 links to each other with power supply VCC1, and the anode of sustained diode 1 links to each other with level shifting circuit.Level shifting circuit comprises resistance R 1, R2, R3, triode V1.One end of resistance R 1 links to each other with the anode of sustained diode 1 (FM4007), and the other end links to each other with the base stage B of triode V1 (L9012QLT1); R2 is connected across between the base stage B and ground of triode V1 (L9012QLT1), and the collector C of triode V1 links to each other with an end of resistance R 3, the other end ground connection of resistance R 3, and the emitter E of triode V1 links to each other with power supply VCC2.Usually the voltage of power supply VCC1 is much larger than the voltage of power supply VCC2.When the magnetic flow convertor operate as normal, behind power supply VCC1 process divider resistance R1, the R2, the base stage B voltage that makes triode V1 is greater than VCC2+V
EB (sat), triode V1 is in cut-off state, and collector C is a low level, sends into microprocessor, after microprocessor detects low level, through predefined program, judges the magnetic flow convertor operate as normal.When magnetic flow convertor broke, triode V1 was in conducting state, and its collector C is a high level, sends into microprocessor, after microprocessor detects high level, through predefined program, judged the magnetic flow convertor broken string.When the power supply VCC1 of magnetic flow convertor changes greatly, need only greater than VCC2+V through the voltage behind divider resistance R1, the R2
BE (sat)(V
BE (sat)Be generally 0.7V); Triode V1 is in cut-off state; The influence that its duty is not changed by power supply VCC1; And microprocessor is judged the state of magnetic flow convertor according to the state of triode V1, and therefore, the erroneous judgement phenomenon appears in microprocessor when avoiding mains voltage variations because of magnetic flow convertor big.
When adopting the above-mentioned burn out detection module that is applied to isolating switch; Realized detection to magnetic flow convertor and intelligent controller connection status; Avoid being connected the unreliable isolating switch that makes and do not thread off, make intelligent breaker have higher safe reliability because of the magnetic flow convertor coil breakage or with intelligent controller; Secondly, erroneous judgement appears in microprocessor when avoiding mains voltage variations because of magnetic flow convertor big, improves the correctness that detects the magnetic flow convertor connection status.
The triode that the utility model relates to can be replaced by the element that plays on-off action, like metal-oxide-semiconductor.
The foregoing description only is the technical conceive and the characteristics of explanation the utility model, and its purpose is to let the personage who is familiar with this technology can understand content of the utility model and enforcement according to this, can not limit the protection domain of the utility model with this.All equivalences of being done according to the utility model spirit change or modify, and all should be encompassed within the protection domain of the utility model.
Claims (4)
1. burn out detection module that is applied to the isolating switch magnetic flow convertor; The burn out detection module is sent into the magnetic flow convertor coil signal that records the microprocessor of circuit breaker intelligent controller; It is characterized in that: said burn out detection module comprises fly-wheel diode (D1) and level conversion unit
Said fly-wheel diode (D1) and magnetic flow convertor coils from parallel connection of coils, the negative terminal of fly-wheel diode (D1) is connected to first power supply (VCC1), and the anode of fly-wheel diode (D1) links to each other with level conversion unit; Level conversion unit connects said microprocessor.
2. burn out detection module according to claim 1; It is characterized in that: said level conversion unit comprises first resistance (R1), second resistance (R2), the 3rd resistance (R3) and triode (V1); One end of said first resistance (R1) links to each other with the anode of fly-wheel diode (D1), and the other end is connected to said triode (V1) base stage; Between the base stage and emitter of said second resistance (R2) cross-over connection triode (V1), said the 3rd resistance (R3) is positioned between the collector of second source (VCC2) and triode (V1).
3. burn out detection module according to claim 1; It is characterized in that: comprise first resistance (R1), second resistance (R2), the 3rd resistance (R3) and triode (V1); One end of said first resistance (R1) links to each other with the anode of fly-wheel diode (D1), and the other end is connected to said triode (V1) base stage; Said second resistance (R2) cross-over connection between the base stage and emitter of triode (V1), said the 3rd resistance (R3) be positioned at and the collector of triode (V1) between.
4. according to claim 2 or 3 described burn out detection modules, it is characterized in that: said triode (V1) is the metal-oxide-semiconductor as switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220019870XU CN202421405U (en) | 2012-01-17 | 2012-01-17 | Disconnection detection module applied to flux converter of circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220019870XU CN202421405U (en) | 2012-01-17 | 2012-01-17 | Disconnection detection module applied to flux converter of circuit breaker |
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| Publication Number | Publication Date |
|---|---|
| CN202421405U true CN202421405U (en) | 2012-09-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220019870XU Expired - Lifetime CN202421405U (en) | 2012-01-17 | 2012-01-17 | Disconnection detection module applied to flux converter of circuit breaker |
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| CN (1) | CN202421405U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107618033A (en) * | 2016-07-13 | 2018-01-23 | 深圳市朗驰欣创科技股份有限公司 | Robot jerk control system and method |
-
2012
- 2012-01-17 CN CN201220019870XU patent/CN202421405U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107618033A (en) * | 2016-07-13 | 2018-01-23 | 深圳市朗驰欣创科技股份有限公司 | Robot jerk control system and method |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120905 |