CN204465372U - A kind of single-chip microcomputer power supply circuits be applied on phase-defect protection circuit breaker off zero - Google Patents
A kind of single-chip microcomputer power supply circuits be applied on phase-defect protection circuit breaker off zero Download PDFInfo
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- CN204465372U CN204465372U CN201520087284.2U CN201520087284U CN204465372U CN 204465372 U CN204465372 U CN 204465372U CN 201520087284 U CN201520087284 U CN 201520087284U CN 204465372 U CN204465372 U CN 204465372U
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Abstract
The utility model discloses a kind of single-chip microcomputer power supply circuits be applied on phase-defect protection circuit breaker off zero; comprise the rectified three-phase circuit be connected with phase electric wire, the junction field effect transistor connecting rectified three-phase circuit, connect the Voltage stabilizing module of junction field effect transistor, the output of described Voltage stabilizing module is connected with single-chip microcomputer.The utility model takes from ac phase voltage, after rectified three-phase circuit, junction field effect transistor and Voltage stabilizing module, become DC5V voltage supply single-chip microcomputer make working power, this working power antijamming capability is strong, even if there is the phenomenons such as phase shortage off zero in three-phase circuit, also can not affect the reliability of single-chip microcomputer work, the timely open circuit of circuit breaker can be made.Further, whole working power volume is little, noise is little, low in energy consumption, dynamic range large, be easy to integrated, is specially adapted on this compact electric apparatus of circuit breaker.
Description
Technical field
The utility model relates to a kind of circuit breaker accessory, is specifically related to a kind of single-chip microcomputer power supply circuits be applied on phase-defect protection circuit breaker off zero.
Background technology
At low voltage three-phase multiple-way system (TN-C three-phase and four-line A, B, C, PEN; TN-S(TN-C-S) Three-phase five-wire A, B, C, N, PE) in distribution system, A, B, C are phase (fire) line, and N line is working zero line (neutral line); in ground protection system, " zero ground " line separately.No matter be in TN-C or TN-S wiring system, PE line is all under any circumstance never allow to disconnect.N line is then had ready conditions and can be disconnected, namely N line all must disconnect with A, B, C phase line (stricti jurise being said N line could must disconnect after A, B, C phase line disconnects), otherwise occur causing the unfortunate event of people and equipment, therefore, allowing N line to disconnect obviously can only be just passable in TN-S wiring.But the N line that is in operation can not disconnect, disconnect i.e. generation " off zero " fault as there is N line.
The reason that N line disconnects is:
1, threephase load is seriously uneven, and N line current is excessive, and the N line that accumulates over a long period blows;
If 2 N tape contacts, contact is bad even disconnects (not contacting);
3, Natural Damage or artificial theft N line.
For a long time, the N line that is in operation disconnects i.e. " off zero " fault and happens occasionally, under there is single-phase load situation, threephase load scarcely balances, and causes neutral displacement, when there is fault off zero, initiation phase voltage is raised suddenly, overflow phasing voltage more than 1.3 times, single-phase device damage, threephase motor certainly will be caused so normally to run, and What is more also may cause casualties.
For solving the problems of the technologies described above; the applicant invents a kind of circuit breaker with default-phase protection function off zero; need in this circuit breaker to adopt single-chip microcomputer to process signal, analyze, judge and provide trip signal; because single-chip microcomputer is integrated in inside narrow and small circuit breaker; special power supply cannot be had as conventional equipment; working power needs to take from ac phase voltage, therefore, needs to design specific power supply circuits to ensure that single-chip microcomputer has stable power supply.
Summary of the invention
In order to overcome the deficiencies in the prior art, the utility model provides the single-chip microcomputer power supply circuits that a kind of working power is stablized, volume is little.
The utility model solves the technical scheme that its technical problem adopts:
A kind of single-chip microcomputer power supply circuits be applied on phase-defect protection circuit breaker off zero; comprise the rectified three-phase circuit be connected with phase electric wire, the junction field effect transistor connecting rectified three-phase circuit, connect the Voltage stabilizing module of junction field effect transistor, the output of described Voltage stabilizing module is connected with single-chip microcomputer.
In the utility model, between phase electric wire and zero line, be provided with piezo-resistance.
In the utility model, the outlet side of described junction field effect transistor is parallel with filter capacitor.
The beneficial effects of the utility model are: the utility model takes from ac phase voltage, after rectified three-phase circuit, junction field effect transistor and Voltage stabilizing module, become DC5V voltage supply single-chip microcomputer make working power, this working power antijamming capability is strong, even if there is the phenomenons such as phase shortage off zero in three-phase circuit, also can not affect the reliability of single-chip microcomputer work, the timely open circuit of circuit breaker can be made.Further, whole working power volume is little, noise is little, low in energy consumption, dynamic range large, be easy to integrated, is specially adapted on this compact electric apparatus of circuit breaker.
Accompanying drawing explanation
Below in conjunction with drawings and embodiments, the utility model is further illustrated:
Fig. 1 is the structural representation of the present embodiment;
Fig. 2 is the circuit theory diagrams of the present embodiment.
Embodiment
With reference to Fig. 1, Fig. 2; the utility model provides a kind of single-chip microcomputer power supply circuits be applied on phase-defect protection circuit breaker off zero; comprise the rectified three-phase circuit 1 be connected with phase electric wire, the junction field effect transistor 2 connecting rectified three-phase circuit 1, the Voltage stabilizing module 3 that connects junction field effect transistor 2, the output of described Voltage stabilizing module 3 is connected with single-chip microcomputer 4.
As preferred embodiment; whole power module is endangered for exempting overvoltage pulse; piezo-resistance 5 is provided with between phase electric wire 7 and zero line 8; and be parallel with filter capacitor 6 at the outlet side of described junction field effect transistor 2; arranged by this redundancy protecting, add the reliability of power supply and single-chip microcomputer 4 work.
The foregoing is only preferred embodiments of the present utility model, as long as the technical scheme realizing the utility model object with basic same approach all belongs within protection range of the present utility model.
Claims (3)
1. one kind is applied to the single-chip microcomputer power supply circuits on phase-defect protection circuit breaker off zero; it is characterized in that: comprise the rectified three-phase circuit (1) be connected with phase electric wire (7), the junction field effect transistor (2) connecting rectified three-phase circuit (1), the Voltage stabilizing module (3) that connects junction field effect transistor (2), the output of described Voltage stabilizing module (3) is connected with single-chip microcomputer (4).
2. a kind of single-chip microcomputer power supply circuits be applied on phase-defect protection circuit breaker off zero according to claim 1, is characterized in that: be provided with piezo-resistance (5) between phase electric wire (7) and zero line (8).
3. a kind of single-chip microcomputer power supply circuits be applied on phase-defect protection circuit breaker off zero according to claim 1 and 2, is characterized in that: the outlet side of described junction field effect transistor (2) is parallel with filter capacitor (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520087284.2U CN204465372U (en) | 2015-02-06 | 2015-02-06 | A kind of single-chip microcomputer power supply circuits be applied on phase-defect protection circuit breaker off zero |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520087284.2U CN204465372U (en) | 2015-02-06 | 2015-02-06 | A kind of single-chip microcomputer power supply circuits be applied on phase-defect protection circuit breaker off zero |
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| Publication Number | Publication Date |
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| CN204465372U true CN204465372U (en) | 2015-07-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520087284.2U Active CN204465372U (en) | 2015-02-06 | 2015-02-06 | A kind of single-chip microcomputer power supply circuits be applied on phase-defect protection circuit breaker off zero |
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| CN (1) | CN204465372U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104682742A (en) * | 2015-02-06 | 2015-06-03 | 广东南冠电气有限公司 | Single-chip microcomputer power supply circuit applied to faulted neutral line and open phase protection circuit breaker |
-
2015
- 2015-02-06 CN CN201520087284.2U patent/CN204465372U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104682742A (en) * | 2015-02-06 | 2015-06-03 | 广东南冠电气有限公司 | Single-chip microcomputer power supply circuit applied to faulted neutral line and open phase protection circuit breaker |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |