CN204538652U - A kind of low-voltage customer over-and under-voltage circuit breaker - Google Patents
A kind of low-voltage customer over-and under-voltage circuit breaker Download PDFInfo
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- CN204538652U CN204538652U CN201520216157.8U CN201520216157U CN204538652U CN 204538652 U CN204538652 U CN 204538652U CN 201520216157 U CN201520216157 U CN 201520216157U CN 204538652 U CN204538652 U CN 204538652U
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- 230000000087 stabilizing effect Effects 0.000 claims description 15
- 230000001681 protective effect Effects 0.000 claims description 10
- 239000003990 capacitor Substances 0.000 claims description 8
- 230000005611 electricity Effects 0.000 abstract description 5
- 208000033999 Device damage Diseases 0.000 abstract description 2
- 239000000203 mixture Substances 0.000 description 7
- 238000010586 diagram Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- 230000001012 protector Effects 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- 238000001914 filtration Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000012271 agricultural production Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
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- 238000005070 sampling Methods 0.000 description 1
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Abstract
The utility model discloses a kind of low-voltage customer over-and under-voltage circuit breaker; comprise choked flow circuit; rectification circuit; divider resistance, overvoltage crowbar, under-voltage protecting circuit and circuits for triggering; described choked flow circuit is connected with rectification circuit; described rectification circuit is connected with divider resistance, and described divider resistance is connected with overvoltage crowbar and under-voltage protecting circuit respectively, and described overvoltage crowbar is all connected with circuits for triggering with under-voltage protecting circuit.Advantage is: whole design loop is simple, can be integrated with current Household electricity leakage protection device, and the function of protecting is leaked in expansion, also can independent utility, and without the need to changing original leakages guarantor circuit; For low-voltage customer excises power consumption equipment fast under overvoltage/undervoltage situation appears in system voltage, avoid causing device damage to provide simple, a reliable solution.
Description
Technical field
The utility model relates to a kind of circuit breaker, specifically a kind of low-voltage customer over-and under-voltage circuit breaker.
Background technology
Along with popularizing of present electric equipment, bring revolutionary change to industrial and agricultural production, Defence business, science and technology, accelerate the development of society, people have stepped into Electrification Age, also make the quality of life of people obtain significantly to improve, people more and more be unable to do without these electric equipments.But how to protect these electric equipments not by extraneous interference, become the subject matter that current development in science and technology is paid close attention to.
The electrical network of current China is fast-developing, and huge network system gives us many convenience.But along with the user of access electrical network increases, and the variation of consumer electronics, also result in the instability of line voltage, voltage fluctuated, just become the principal element damaging electric equipment.How to protect power consumption equipment when change in voltage is larger, more and more cause the concern of people.
Traditional low-voltage customer lead-in circuit breaker is opened based on fuse, sky, earth leakage protective device; its protection philosophy is all based on overcurrent tripping system; and also there is voltage at low pressure 220V supply network and raise suddenly; if distribution transforming neutral point is because having no progeny in a variety of causes; user side voltage spikes (the highest may be raised to 380V); user's overvoltage is caused to burn out the situation of equipment; the electric equipment that other is higher to voltage request has dropped into voltage control approach on the terminal device repeatedly in order to security of operation, makes to drop into strengthen.
Utility model content
In order to solve the problems of the technologies described above, the utility model provides a kind of low-voltage customer over-and under-voltage circuit breaker, takes into account, impact that under voltage causes user, simplifies user's voltage control mode.
The technical solution adopted in the utility model is: a kind of low-voltage customer over-and under-voltage circuit breaker; comprise choked flow circuit; rectification circuit; divider resistance, overvoltage crowbar, under-voltage protecting circuit and circuits for triggering; described choked flow circuit is connected with rectification circuit; described rectification circuit is connected with divider resistance, and described divider resistance is connected with overvoltage crowbar and under-voltage protecting circuit respectively, and described overvoltage crowbar is all connected with circuits for triggering with under-voltage protecting circuit.
Described rectification circuit is the unidirectional bridge rectifier that the 1st diode forms to the 4th diode.
Described circuits for triggering comprise a unidirectional thyristor.
Described under-voltage protecting circuit comprises the first voltage stabilizing didoe, 5th diode, triode, filter capacitor, protective resistance and sample resistance, described divider resistance is connected with filter capacitor, described filter capacitor is connected with the positive pole of the first voltage stabilizing didoe, first voltage stabilizing didoe negative pole is connected with the collector electrode of triode, the emitter of described triode is connected with the positive pole of the 5th diode, the negative pole of the 5th diode is connected with the trigger end of unidirectional thyristor, the collector electrode of described triode, emitter and base stage are all in series with protective resistance, the described protective resistance be connected with base stage is connected with sample resistance.
Described overvoltage crowbar comprises second voltage stabilizing didoe of connecting with divider resistance, and the described positive pole of the second voltage stabilizing didoe is connected with the trigger end of unidirectional thyristor.
Described choked flow circuit also connects a piezo-resistance.
The utility model advantage is: whole design loop is simple, can be integrated with current Household electricity leakage protection device, and the function of protecting is leaked in expansion, also can independent utility, and without the need to changing original leakages guarantor circuit; For low-voltage customer excises power consumption equipment fast under overvoltage/undervoltage situation appears in system voltage, avoid causing device damage to provide simple, a reliable solution; Introduce piezo-resistance as major control element, utilize its Interruption performance in voltage, meet the quick response function of circuit breaker.
Accompanying drawing explanation
Fig. 1 is circuit diagram of the present utility model;
Fig. 2 is that Fig. 1 gets the bid out the working circuit diagram of overvoltage circuit
Fig. 3 is the working circuit diagram marking under-voltage circuit in Fig. 1;
Fig. 4 is the utility model abnormal pressure working circuit diagram when entering.
Embodiment
Below in conjunction with the drawings and specific embodiments, the technical solution of the utility model is further described, but protection range of the present utility model is not limited thereto.
As shown in Figure 1; a kind of low-voltage customer over-and under-voltage circuit breaker; comprise choked flow circuit, rectification circuit, divider resistance R1, R2, R3; overvoltage crowbar; under-voltage protecting circuit and circuits for triggering, described choked flow circuit is connected with rectification circuit, and described rectification circuit is connected with divider resistance; described divider resistance is connected with overvoltage crowbar and under-voltage protecting circuit respectively, and described overvoltage crowbar is all connected with circuits for triggering with under-voltage protecting circuit.
Described rectification circuit is the unidirectional bridge rectifier of diode D1, D2, D3 and D4 composition.
Described circuits for triggering comprise a unidirectional thyristor VT1.
Described under-voltage protecting circuit comprises the first voltage stabilizing didoe DW1, diode D5, triode BG1, filter capacitor C2, protective resistance R4, R5, R6 and sample resistance R7, R8, described divider resistance is connected with filter capacitor C2, described filter capacitor C2 is connected with the positive pole of voltage stabilizing didoe DW1, the negative pole of DW1 is connected with the collector electrode of triode BG1, the emitter of BG1 is connected with the positive pole of diode D5, the negative pole of D5 is connected with the trigger end of unidirectional thyristor, the collector electrode of described triode BG1, emitter and base stage are in series with protective resistance R4 respectively, R5, R6, protective resistance R6 and sample resistance R7, R8 connects.
Described overvoltage crowbar comprises the second voltage stabilizing didoe DW2 connected with divider resistance, and the positive pole of voltage stabilizing didoe DW2 is connected with the trigger end of unidirectional thyristor.
Described choked flow circuit also connects a piezo-resistance RT1.
Its course of work is as follows:
Overvoltage operating circuit: working power is through L1(filtering at ordinary times: anti-momentary spikes interference etc.) and the rectification of D1-D4 composition, export 220 volts of direct voltages, voltage is detected to DW2 voltage stabilizing didoe from drawing between R2, R3 after R1-R3 dividing potential drop, when voltage is elevated to certain value, DW2 reverse breakdown, leakage current is loaded on one-way SCR trigger end, controlled silicon conducting, (220V50Hz alternating current is by the isolator of four diode compositions, by the corresponding moment unidirectional voltage of positive and negative for 50Hz half wave conversion, then realize conducting with unidirectional silicon); L1 magnetictrip obtains conducting, release action, and link gear is cut off the electricity supply (this protector of turned off in synchronization power supply).
Under-voltage operating circuit: working power is through L1(filtering at ordinary times: anti-momentary spikes interference etc.) and the rectification of D1-D4 composition, export 220 volts of direct voltages, through R1, R2, R3, C2, DW1, R5 composition stable voltage reference point and R7, R8 composition voltage sampling point and BG1, R4, D5 form under-voltage detection actuating circuit, here C1 prevent large appliance starting moment step-down cause misoperation; BG1 crystal switch pipe is NPN structure, collector voltage is 10V at ordinary times, base voltage is 12V, at this moment triode is just equivalent to a diode, and forward conduction, base stage will only have about 0.7V to collector voltage, BG1 is cut-off state, because the operating voltage reference value be made up of R1, R2, C2, DW1, R5 makes BG1 collector potential constant, current potential passes through the monitoring voltage value of R7, R8 composition higher than collector electrode at ordinary times, so BG1 cut-off; Once base voltage is lower than collector voltage, BG1 is switching tube state, and voltage is by R5, BG1, R4, D5 to VT1 trigger end; protection act, controllable silicon VT1 conducting, L1 magnetictrip obtains conducting; release action, link gear is cut off the electricity supply (this protector of turned off in synchronization power supply).
L1 seals in and is equivalent to choke, causes circuit burnout after preventing circuit from accessing suddenly 380V voltage.
When primary voltage raises suddenly; in case of unexpected high pressure invades (induced lightening electric wave); voltage is loaded into RT1 piezo-resistance two ends through L1 magnetictrip coil; piezo-resistance RT1 can puncture fast; L1 magnetictrip obtains conducting; release action, link gear is cut off the electricity supply (this protector of turned off in synchronization power supply).
Claims (6)
1. a low-voltage customer over-and under-voltage circuit breaker; it is characterized in that; comprise choked flow circuit, rectification circuit, divider resistance; overvoltage crowbar; under-voltage protecting circuit and circuits for triggering, described choked flow circuit is connected with rectification circuit, and described rectification circuit is connected with divider resistance; described divider resistance is connected with overvoltage crowbar and under-voltage protecting circuit respectively, and described overvoltage crowbar is all connected with circuits for triggering with under-voltage protecting circuit.
2. a kind of low-voltage customer over-and under-voltage circuit breaker according to claim 1, is characterized in that, described rectification circuit is the unidirectional bridge rectifier that the 1st diode forms to the 4th diode.
3. a kind of low-voltage customer over-and under-voltage circuit breaker according to claim 1, is characterized in that described circuits for triggering comprise a unidirectional thyristor.
4. a kind of low-voltage customer over-and under-voltage circuit breaker according to claim 1, it is characterized in that, described under-voltage protecting circuit comprises the first voltage stabilizing didoe, 5th diode, triode, filter capacitor, protective resistance and sample resistance, described filter capacitor is connected with the positive pole of divider resistance and the first voltage stabilizing didoe respectively, first voltage stabilizing didoe negative pole is connected with the collector electrode of triode, the emitter of described triode is connected with the positive pole of the 5th diode, the negative pole of the 5th diode is connected with the trigger end of unidirectional thyristor, the collector electrode of described triode, emitter and base stage are all in series with protective resistance, the protective resistance be connected with base stage is connected with sample resistance.
5. a kind of low-voltage customer over-and under-voltage circuit breaker according to claim 1 or 3; it is characterized in that; described overvoltage crowbar comprises second voltage stabilizing didoe of connecting with divider resistance, and the described positive pole of the second voltage stabilizing didoe is connected with the trigger end of unidirectional thyristor.
6. a kind of low-voltage customer over-and under-voltage circuit breaker according to claim 1, it is characterized in that, described choked flow circuit also connects a piezo-resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520216157.8U CN204538652U (en) | 2015-04-13 | 2015-04-13 | A kind of low-voltage customer over-and under-voltage circuit breaker |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520216157.8U CN204538652U (en) | 2015-04-13 | 2015-04-13 | A kind of low-voltage customer over-and under-voltage circuit breaker |
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| CN204538652U true CN204538652U (en) | 2015-08-05 |
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| CN201520216157.8U Expired - Fee Related CN204538652U (en) | 2015-04-13 | 2015-04-13 | A kind of low-voltage customer over-and under-voltage circuit breaker |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104836197A (en) * | 2015-04-13 | 2015-08-12 | 国家电网公司 | Low-voltage user overvoltage under-voltage circuit breaker |
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2015
- 2015-04-13 CN CN201520216157.8U patent/CN204538652U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104836197A (en) * | 2015-04-13 | 2015-08-12 | 国家电网公司 | Low-voltage user overvoltage under-voltage circuit breaker |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150805 |
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| CF01 | Termination of patent right due to non-payment of annual fee |