CN105006808A - Three-phase no-voltage undervoltage intelligent release for low voltage circuit breaker - Google Patents
Three-phase no-voltage undervoltage intelligent release for low voltage circuit breaker Download PDFInfo
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- CN105006808A CN105006808A CN201510365896.8A CN201510365896A CN105006808A CN 105006808 A CN105006808 A CN 105006808A CN 201510365896 A CN201510365896 A CN 201510365896A CN 105006808 A CN105006808 A CN 105006808A
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Abstract
The invention discloses a three-phase no-voltage undervoltage intelligent release for a low-voltage circuit breaker. The three-phase no-voltage undervoltage intelligent release comprises a release and a control circuit, wherein the control circuit is connected with the release, and the control circuit comprises a three-phase voltage detection circuit, a no-voltage energy storage circuit, a release coil driving circuit, a time-delay setting circuit, a CPU control circuit and a power supply circuit; an input end of the three-phase voltage detection circuit is connected with three phases of voltages, and an output end is connected with a CPU control circuit; an input end of the no-voltage energy storage circuit is connected with three phases of voltages, an output end of the no-voltage energy storage circuit is connected with the release coil driving circuit, and another output end is connected with the power supply circuit; an output end of the power supply circuit is connected with the release coil driving circuit, another output end is connected with the CPU control circuit; the CPU control circuit is connected with the release coil driving circuit; and the time-delay setting circuit is connected with the CPU control circuit.
Description
Technical field
The present invention relates to a kind of electrical network intelligent controller, especially relate to a kind of under-voltage intelligent electrical apparatus release of three-phase pressure loss of the band delay function for low-voltage circuit breaker.
Background technology
The device for under-voltage releasing equipment of low-voltage circuit breaker is a kind of low-voltage distribution voltage protection; its effect is when voltage automatically disconnects low-voltage circuit breaker lower than device for under-voltage releasing equipment dropout during setting or can prevent low-voltage circuit breaker from closing a floodgate under circuit low-voltage state in low-voltage distributing line; thus the harm that protection circuit and equipment produce from low-voltage; as motor reversing etc.; at present in distributed photovoltaic power generation process; when system voltage is down to code requirement value, low-pressure grid-connection switch must be threaded off.But low-voltage circuit breaker device for under-voltage releasing equipment technical scheme is traditional detection single-wire voltage at present; its shortcoming can only detect a phase voltage for low voltage three-phase circuit; all the other two-phase voltages do not detect; once there is under-voltage protection of cannot threading off; intactly cannot detect the voltage status of three-phase line, protective value imperfection.Therefore existing release does not possess anti-interference, time delay and three-phase detection tripping function.
Summary of the invention
The present invention in order to solve the defect existed in above-mentioned prior art, provide a kind of band delay function for low-voltage circuit breaker the under-voltage intelligent electrical apparatus release of three-phase pressure loss.
The technical scheme that technical solution problem of the present invention adopts is: the present invention includes release and control circuit, control circuit is connected with release, and described control circuit comprises three-phase phase voltage testing circuit, decompression accumulator, tripping coil drive circuit, delay setting circuit, cpu control circuit and power circuit; Three-phase phase voltage testing circuit input is connected with three-phase voltage, and output is connected with cpu control circuit; Decompression accumulator input is connected with three-phase voltage, and an output of decompression accumulator is connected with tripping coil drive circuit, and another output is connected with power circuit; An output of power circuit is connected with tripping coil drive circuit, and another output is connected with cpu control circuit; Cpu control circuit is connected with tripping coil drive circuit; Delay setting circuit is connected with cpu control circuit.
The function of described three-phase phase voltage testing circuit is the AD sampling end inputting cpu control circuit after three-phase voltage is converted to the signal of telecommunication of low pressure.
The function of described decompression accumulator is that three-phase voltage rectification is obtained direct current.
The function of described tripping coil drive circuit is the signal of reception cpu control circuit and drives release action.
The function of described delay setting circuit sets certain delay time, signals to tripping coil drive circuit again after exceeding the delay time of this setting by cpu control circuit, drives release to thread off, have certain antijamming capability to make release.
The function of described cpu control circuit receives the sampling calculating of three-phase phase voltage testing circuit, the reading of delay time, the control of tripping coil drive circuit.
The function of described power circuit is that the direct voltage of DC18V/3.3V is to cpu control circuit and tripping coil drive circuitry voltage transitions.
Described release is magnetictrip.
The invention has the beneficial effects as follows: compared with prior art, the present invention has under-voltage, anti-interference delayed releasing function, and can automatic pick after supply voltage recovery is normal.
Accompanying drawing explanation
Fig. 1 is the under-voltage intelligent electrical apparatus release block diagram of three-phase pressure loss of the present invention.
Fig. 2 is A phase voltage detection circuit schematic diagram of the present invention.
Fig. 3 is decompression accumulator schematic diagram of the present invention.
Fig. 4 is tripping coil driving circuit principle figure of the present invention.
Fig. 5 is cpu control circuit schematic diagram of the present invention.
Embodiment
Below in conjunction with embodiment and accompanying drawing, further detailed annotation is done to the present invention.
As shown in the figure, the present invention includes release and control circuit, control circuit is connected with release.Described control circuit comprises three-phase phase voltage testing circuit, decompression accumulator, tripping coil drive circuit, delay setting circuit, cpu control circuit and power circuit; Three-phase phase voltage testing circuit input is connected with three-phase voltage, and output is connected with cpu control circuit; Decompression accumulator input is connected with three-phase voltage, and an output of decompression accumulator is connected with tripping coil drive circuit, and another output is connected with power circuit; An output of power circuit is connected with tripping coil drive circuit, and another output is connected with cpu control circuit; Cpu control circuit is connected with tripping coil drive circuit; Delay setting circuit is connected with cpu control circuit.
The function of described three-phase phase voltage testing circuit is the AD sampling end inputting cpu control circuit after three-phase voltage is converted to the signal of telecommunication of low pressure.
The function of described decompression accumulator is that three-phase voltage rectification is obtained direct current.
The function of described tripping coil drive circuit is the signal of reception cpu control circuit and drives release action.
The function of described delay setting circuit sets certain delay time, signals to tripping coil drive circuit again after exceeding the delay time of this setting by cpu control circuit, drives release to thread off, have certain antijamming capability to make release.Delay setting circuit of the present invention is general delay circuit.
The function of described cpu control circuit receives the sampling calculating of three-phase phase voltage testing circuit, the reading of delay time, the control of tripping coil drive circuit.
The function of described power circuit is that the direct voltage of DC18V/3.3V is to cpu control circuit and tripping coil drive circuitry voltage transitions.Power circuit of the present invention is general power circuit.
Described three-phase phase voltage testing circuit comprises A phase voltage detection circuit, B phase voltage detection circuit and C phase voltage detection circuit, A phase voltage detection circuit comprises the A commutating phase circuit be made up of diode D11, D3a, resistance R21, R11, electric capacity C2b, diode D11 output is connected with resistance R21, resistance R1 and D3a, R11, C2b connect, resistance R11 is parallel with electric capacity C2b, A phase voltage UA becomes low pressure measurement signal VA through A phase voltage detection circuit; B phase voltage detection circuit forms identical with A phase voltage detection circuit with the circuit of C phase voltage detection circuit, and B phase voltage UB becomes low pressure measurement signal VB through B phase voltage detection circuit, and C phase voltage UC becomes low pressure measurement signal VC through C phase voltage detection circuit.
Decompression accumulator comprises diode D4, D5, D7, voltage stabilizing didoe D2, D15, D16, D17, D12, metal-oxide-semiconductor Q2, electric capacity C6 and resistance R16, R23, diode D4 is connected with metal-oxide-semiconductor Q2 by resistance R16, electric capacity C6 is connected with metal-oxide-semiconductor Q2 with after voltage-stabiliser tube D12 parallel connection, voltage stabilizing didoe D15 one end is connected with diode D12, the other end is connected with voltage-stabiliser tube D16, D16 and D17 connects, D17 and D2 connects, three-phase voltage obtains direct voltage after over commutation, stable DC voltage DC is obtained and at electric capacity C16 by metal-oxide-semiconductor Q2 carrier Control, C16c, C13, C13c, C15, storage power in C15c.
Tripping coil drive circuit comprises triode Q3, under-voltage coil P2, metal-oxide-semiconductor Q1, diode D6, resistance R15, R5, R22, R8, triode Q3 is connected with metal-oxide-semiconductor Q1, under-voltage coil P2 is connected on metal-oxide-semiconductor Q1, and diode D6 is connected with metal-oxide-semiconductor Q1, and triode Q3 is connected with cpu control circuit.
Cpu control circuit adopts the single-chip microcomputer 89LPC915 of NXP company, and low pressure measurement signal VA, VB, VC of detecting voltage by three phase circuit access 1 pin, 14 pin and 13 pin respectively, and delay function arranges switch S 3 and accesses 8 pin and 9 pin.
Described release is magnetictrip.
Operation principle of the present invention is: detecting voltage by three phase circuit Real-Time Monitoring three-phase mains voltage, when voltage drop to 35% ~ 70% rated voltage, the first time delay official hour of delay setting circuit, such as 10 seconds, if (in 10 seconds) voltage is still abnormal in official hour, then cpu control circuit drives the action of tripping coil drive circuit, and release is threaded off; If in official hour more than voltage resume to 85%, then do not thread off.
After undervoltage tripping, time more than voltage resume to 85%, cpu control circuit drives the action of tripping coil drive circuit, makes release adhesive.
Claims (6)
1. the under-voltage intelligent electrical apparatus release of the three-phase pressure loss for low-voltage circuit breaker, comprise release and control circuit, control circuit is connected with release, it is characterized in that described control circuit comprises three-phase phase voltage testing circuit, decompression accumulator, tripping coil drive circuit, delay setting circuit, cpu control circuit and power circuit; Three-phase phase voltage testing circuit input is connected with three-phase voltage, and output is connected with cpu control circuit; Decompression accumulator input is connected with three-phase voltage, and an output of decompression accumulator is connected with tripping coil drive circuit, and another output is connected with power circuit; An output of power circuit is connected with tripping coil drive circuit, and another output is connected with cpu control circuit; Cpu control circuit is connected with tripping coil drive circuit; Delay setting circuit is connected with cpu control circuit;
The function of described three-phase phase voltage testing circuit is the AD sampling end inputting cpu control circuit after three-phase voltage is converted to the signal of telecommunication of low pressure;
The function of described decompression accumulator is that three-phase voltage rectification is obtained direct current;
The function of described tripping coil drive circuit is the signal of reception cpu control circuit and drives release action;
The function of described delay setting circuit sets certain delay time, signals to tripping coil drive circuit again after exceeding the delay time of this setting by cpu control circuit, drives release to thread off, have certain antijamming capability to make release;
The function of described cpu control circuit receives the sampling calculating of three-phase phase voltage testing circuit, the reading of delay time, the control of tripping coil drive circuit;
The function of described power circuit is that the direct voltage of DC18V/3.3V is to cpu control circuit and tripping coil drive circuitry voltage transitions.
2. the under-voltage intelligent electrical apparatus release of a kind of three-phase pressure loss for low-voltage circuit breaker as claimed in claim 1, it is characterized in that described three-phase phase voltage testing circuit comprises A phase voltage detection circuit, B phase voltage detection circuit and C phase voltage detection circuit, A phase voltage detection circuit comprises by diode D11, D3a, resistance R21, R11, the A commutating phase circuit that electric capacity C2b is formed, diode D11 output is connected with resistance R21, resistance R1 and D3a, R11, C2b connects, resistance R11 is parallel with electric capacity C2b, A phase voltage UA becomes low pressure measurement signal VA through A phase voltage detection circuit, B phase voltage detection circuit forms identical with A phase voltage detection circuit with the circuit of C phase voltage detection circuit, and B phase voltage UB becomes low pressure measurement signal VB through B phase voltage detection circuit, and C phase voltage UC becomes low pressure measurement signal VC through C phase voltage detection circuit.
3. the under-voltage intelligent electrical apparatus release of a kind of three-phase pressure loss for low-voltage circuit breaker as claimed in claim 1, it is characterized in that described decompression accumulator comprises diode D4, D5, D7, voltage stabilizing didoe D2, D15, D16, D17, D12, metal-oxide-semiconductor Q2, electric capacity C6 and resistance R16, R23, diode D4 is connected with metal-oxide-semiconductor Q2 by resistance R16, electric capacity C6 is connected with metal-oxide-semiconductor Q2 with after voltage-stabiliser tube D12 parallel connection, voltage stabilizing didoe D15 one end is connected with diode D12, the other end is connected with voltage-stabiliser tube D16, D16 and D17 connects, D17 and D2 connects, three-phase voltage obtains direct voltage after over commutation, stable DC voltage DC is obtained and at electric capacity C16 by metal-oxide-semiconductor Q2 carrier Control, C16c, C13, C13c, C15, storage power in C15c.
4. the under-voltage intelligent electrical apparatus release of a kind of three-phase pressure loss for low-voltage circuit breaker as claimed in claim 1, it is characterized in that described tripping coil drive circuit comprises triode Q3, under-voltage coil P2, metal-oxide-semiconductor Q1, diode D6, resistance R15, R5, R22, R8, triode Q3 is connected with metal-oxide-semiconductor Q1, under-voltage coil P2 is connected on metal-oxide-semiconductor Q1, diode D6 is connected with metal-oxide-semiconductor Q1, and triode Q3 is connected with cpu control circuit.
5. the under-voltage intelligent electrical apparatus release of a kind of three-phase pressure loss for low-voltage circuit breaker as claimed in claim 1, it is characterized in that described cpu control circuit adopts the single-chip microcomputer 89LPC915 of NXP company, low pressure measurement signal VA, VB, VC of detecting voltage by three phase circuit access 1 pin, 14 pin and 13 pin respectively, and delay function arranges switch S 3 and accesses 8 pin and 9 pin.
6. the under-voltage intelligent electrical apparatus release of a kind of three-phase pressure loss for low-voltage circuit breaker as claimed in claim 1, is characterized in that described release is magnetictrip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510365896.8A CN105006808A (en) | 2015-06-29 | 2015-06-29 | Three-phase no-voltage undervoltage intelligent release for low voltage circuit breaker |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510365896.8A CN105006808A (en) | 2015-06-29 | 2015-06-29 | Three-phase no-voltage undervoltage intelligent release for low voltage circuit breaker |
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| CN105006808A true CN105006808A (en) | 2015-10-28 |
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| CN201510365896.8A Pending CN105006808A (en) | 2015-06-29 | 2015-06-29 | Three-phase no-voltage undervoltage intelligent release for low voltage circuit breaker |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105552830A (en) * | 2016-03-09 | 2016-05-04 | 苏州未来电器股份有限公司 | Intelligent release for under voltage and voltage loss |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20100138004A (en) * | 2009-06-24 | 2010-12-31 | 대동전자(주) | The circuit braker having function for shorting the trip time when over current happens |
| CN202840468U (en) * | 2012-05-18 | 2013-03-27 | 厦门尤伯电气有限公司 | Permanent-magnetic overvoltage or under-voltage protector |
| CN103036593A (en) * | 2012-12-30 | 2013-04-10 | 青岛东软载波科技股份有限公司 | Low-voltage power line carrier communication circuit |
| CN203406596U (en) * | 2013-08-19 | 2014-01-22 | 人民电器集团有限公司 | Under-voltage tripping device |
-
2015
- 2015-06-29 CN CN201510365896.8A patent/CN105006808A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20100138004A (en) * | 2009-06-24 | 2010-12-31 | 대동전자(주) | The circuit braker having function for shorting the trip time when over current happens |
| CN202840468U (en) * | 2012-05-18 | 2013-03-27 | 厦门尤伯电气有限公司 | Permanent-magnetic overvoltage or under-voltage protector |
| CN103036593A (en) * | 2012-12-30 | 2013-04-10 | 青岛东软载波科技股份有限公司 | Low-voltage power line carrier communication circuit |
| CN203406596U (en) * | 2013-08-19 | 2014-01-22 | 人民电器集团有限公司 | Under-voltage tripping device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105552830A (en) * | 2016-03-09 | 2016-05-04 | 苏州未来电器股份有限公司 | Intelligent release for under voltage and voltage loss |
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| C41 | Transfer of patent application or patent right or utility model | ||
| CB03 | Change of inventor or designer information |
Inventor after: Chen Ding Inventor after: He Ping Inventor after: Tang Cuan Inventor after: Zhang Leiqiong Inventor after: Lu Yao Inventor before: Chen Ding Inventor before: He Ping Inventor before: Wang Kangxiong Inventor before: Zhang Leiqiong Inventor before: Lu Yao |
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Effective date of registration: 20160419 Address after: Jiaxing City, Zhejiang province 314000 North Road No. 99 Applicant after: Jiaxing Hengchuang Electric Power Design Research Institute Co., Ltd. Applicant after: Jiaxing Power Supply Company, State Grid Zhejiang Electronic Power Company Address before: Jiaxing City, Zhejiang province 314000 North Road No. 99 Applicant before: Jiaxing Hengchuang Electric Power Design Research Institute Co., Ltd. |
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| RJ01 | Rejection of invention patent application after publication | ||
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Application publication date: 20151028 |