CN1744403A - Intelligent magnetic retaining over under voltage protector - Google Patents
Intelligent magnetic retaining over under voltage protector Download PDFInfo
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- CN1744403A CN1744403A CN 200410055368 CN200410055368A CN1744403A CN 1744403 A CN1744403 A CN 1744403A CN 200410055368 CN200410055368 CN 200410055368 CN 200410055368 A CN200410055368 A CN 200410055368A CN 1744403 A CN1744403 A CN 1744403A
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Abstract
Being applied to low voltage power system in three-phase four wires mainly, the protector protects over voltage and under voltage of single-phase line automatically caused by fault of neutral wire, and unbalance voltages in three-phases. The protector is installed in front end of single-phase of user line. Characters are that: using magnetic latching relay is as switch for breaking line; using program in single chip for realizing operations: when voltage of line exceeds 260+/-5V, line is switched off automatically; when voltage of line is recovered back to 235+/-5V, line is switched on automatically. The invention possesses technical characters: consuming less than 100mw, the protector can control power larger than 13000 KW; when breaking line, contactor possesses treating function for less arc over; operating voltage is 0-450V; anti transient over voltage is 4.5Kv etc.
Description
Technical field:
The invention belongs to the low-voltage electrical apparatus class, be mainly concerned with in the three-phase and four-line low-voltage power supply system, the uniline overvoltage that causes by reasons such as neutral line fault and imbalance of three-phase voltage, a kind of automatic protector of under voltage.
Background technology:
The state-of-the-art resist technology of domestic present employing; be to install at single-phase circuit user entry place, downstream (distribution box); the under voltage protection device; its technique effect is: when circuit took place; automatic line disconnection during under voltage; when recovering normal voltage, connects in circuit circuit automatically; its typical case is represented as; Chinese invention patent 96117305.X full-automatic single-phase potential error protector and Chinese invention patent 00129110.6 intelligent uniphase voltage deviation protector; all can be under the unmanned condition that participates in, the normal operation that has promptly guaranteed power consumption equipment has guaranteed the safety of power consumption equipment again.; this protector utilizes electromagnetic type relay as the switch that cuts off and connect circuit; make the consumption power consumption of protector built-in control circuit and relay coil increase; this will influence protector reliability and life-span; small-sized high-power electromagnetic type relay contact loaded current also is difficult for accomplishing surpassing more than the 40A simultaneously; this is the raising of limiting protecting device power controlling, thereby has limited the scope of application.
Summary of the invention:
In order to overcome the deficiency of above two patents of invention, the present invention develops a kind of, is installed in the front end of single-phase subscriber's line, utilizes the switch of magnetic latching relay as the disjunction circuit; Utilize Single Chip Microcomputer (SCM) program to realize that line voltage distribution surpasses the automatic line disconnection of 260 ± 5V, returns to 235 ± 5V and connects circuit automatically; Have consumed power less than 100 milliwatts power controlling greater than 10,000 3 kilowatts; Contact has few arcing processing capacity when the disjunction circuit; Operating voltage is 0V to 450V; It is capable of automatic alarm when contact etc. breaks down; Anti-transient overvoltage ability kept the under voltage protection device smaller or equal to the intelligent magnetic more than the 4.5KV, had fundamentally overcome the shortcoming of being brought by electromagnetic type relay.
Intelligent magnetic of the present invention kept under voltage protection device (Fig. 1); be by uniline voltage (L; voltage between the N) enter step-down rectifier (2) circuit and sample circuit (4) respectively through protective circuit (1); the voltage of its step-down rectifier (2) circuit is supplied with single-chip microcomputer (5) through voltage stabilizing circuit (3) and is done power supply; its sample circuit (4) signal is supplied with single-chip microcomputer (5) input; single-chip microcomputer (5) is gathered the current signal in contact circuit (7) back magnitude voltage signals and the current sensor (8) in real time simultaneously; above-mentioned signal is handled by drive coil (6) circuit through Single Chip Microcomputer (SCM) program, makes contact circuit (7) switch on or off the phase line circuit.It is characterized by (Fig. 2), utilize the switch of magnetic latching relay as the disjunction circuit; Utilize Single Chip Microcomputer (SCM) program to realize every function of under voltage protection; Has few arcing processing capacity when utilizing Single Chip Microcomputer (SCM) program to realize consumed power less than 100 milliwatts and contact disjunction circuit.
Above-mentioned protective circuit (1) is made up of low-frequency choke coil and TVS pipe, realizes the impact and the High-frequency Interference of anti-transient overvoltage, and its technical characterictic is, low-frequency choke coil is connected in the phase line, and the TVS pipe is connected in parallel on behind the choke grade;
The decompression capacitor (C10) of above-mentioned step-down rectifying circuit (2) lining, its technical characterictic are that capacity parameter is chosen in below the 0.1uf, has reduced the consumption of circuit energy at ordinary times;
Above-mentioned voltage stabilizing circuit (3) lining filter capacitor, its technical characterictic be, parameter is chosen in more than the 330uf, and reserve power provides the energy of instantaneous driving magnetic latching relay coil;
Above-mentioned sample circuit (4) is made up of diode and resistance, realizes the alternation sampling, and its technical characterictic is, is connected between phase line and the single-chip microcomputer input by the circuit of diode series resistance;
Above-mentioned single-chip microcomputer (5) is characterized by, by 8 pin single-chip microcomputers of built in A/D converter and memory;
Above-mentioned drive coil circuit (6) is made up of resistance, triode, magnetic latching relay coil, realize of the control of input base current to the output collector current, technical characterictic is, input transistor base series resistance is connected in the single-chip microcomputer output, output triode collector electrode series connection magnetic latching relay coil.
Description of drawings:
Fig. 1 is an overall technical architecture hardware circuit feature schematic diagram of the present invention
Label among Fig. 1:
(1), protective circuit (2), step-down rectifier (3), voltage stabilizing circuit
(4), sample circuit (5), single-chip microcomputer (6), drive coil
(7), switch contacts (8), current sensor
Fig. 2 is the form of the technology of the present invention functional character
Fig. 3 is an overall technical architecture hardware circuit embodiment schematic diagram of the present invention
Label among Fig. 3:
N is the neutral line; L is a phase line; L1 is a low-frequency choke coil; TVS is a bipolar diode; C is an electric capacity; Q is a triode; D is a diode; DZ is a voltage stabilizing didoe; R is a resistance; DPJ is a single-chip microcomputer; L2 and L3 are the magnetic latching relay coil; K is a switch contact; DF is a light-emitting diode; Zgq is a current sensor.
Fig. 4 is the embodiment main program schematic flow sheet of overall technical architecture of the present invention
Further specify below in conjunction with Fig. 3 embodiment, the processing that the power supply of uniline is the L1 low-frequency choke coil by anti-transient overvoltage circuit, supplying with the TVS bipolar diode further absorbs residual overvoltage, make normal voltage through C10 capacitance decompression and the rectification of D10-D13 utmost point pipe, pass through current-limiting resistance R12 again by the voltage stabilizing of DZ voltage stabilizing didoe, supply with the DPJ single-chip microcomputer and do the control power supply, simultaneously, then directly supply with the drive coil circuit without the power supply of voltage stabilizing; Three road sample circuits then are taken from the voltage of contact K front-end and back-end respectively and one road electric current zgq of contact front end supplies with the DPJ single-chip microcomputer, after the program in the DPJ single-chip microcomputer is to three tunnel signal analysis, drive L2 and L3 coil by R40, R41, Q40, Q41, Q43, Q44, make the line disconnection of K contact or connect circuit, then, by R50, D50 contact state is supplied with the DPJ single-chip microcomputer and do further affirmation, show current state by DF.In order to obtain consumed power minimum under normal voltage, overvoltage, under-voltage state, select capacitor C 10 capacity parameters in the reduction voltage circuit be 0.1uf once, in order to obtain enough instantaneous promotion power, selecting the capacity parameter of the filter capacitor C12 in the voltage stabilizing circuit is to carry out energy reserve more than the 330uf, adapt to the building electric apparatus modular requirement in order to reduce volume, selection single-chip microcomputer (5) is 8 pin single-chip microcomputers by built in A/D converter and memory.
Further specify in conjunction with Fig. 4 embodiment on the basis of above-mentioned Fig. 3, at first explanation is circuit when power supply, and the magnetic latching relay contact is an open mode, and this open mode is formed by a preceding power down (having experienced under-voltage process).When starting time-histories ordered pair single-chip microcomputer, protector redefines; the characteristic of mating mutually with the peripheral hardware circuit is set; then; detect current line voltage distribution whether overvoltage is arranged; under voltage; normal voltage and contact state; and change corresponding program over to and handle; contact disconnects or when connecting circuit if desired in the process of handling; then move (disconnecting or connection) at the AC current phase zero cross near; when making the contact disconnection or connecting circuit; have few arcing processing capacity, reduced the contact fault, improved reliability; when contact breaks down; the relay mechanical breakdown; the relay coil broken string is then reported to the police by the DF flicker.
Intelligent magnetic kept the technology leading indicator and the characteristics of under voltage protection device
1 line voltage distribution surpasses the automatic line disconnection of 260 ± 5V, returns to 235 ± 5V and connects circuit automatically.
2 consumed powers do not generate heat continuous operation all the year round less than 100 milliwatts.
3 bearing powers are smaller or equal to 10,000 3 kilowatts.
4 operating voltage AC 0V-450V.
5 have the impact capacity of anti-transient overvoltage smaller or equal to 4.5KV.
6 relay contacts have few arcing processing capacity when the disjunction circuit.
7 have between kind startup time-delay in 3 minutes accurately and between the recovery time-delay.
9 mistakes, under voltage journey operate time anti-time limit characteristic.
10 contacts, relay coil, when existing fault, relay machinery then reports to the police.
The above, it only is preferred embodiment of the present invention, be not to pro forma restriction of the present invention, every after having seen technical solution of the present invention and embodiment, only any change of carrying out in the local techniques feature, make the open-and-shut technology of those skilled in the art, can be considered and be equal to replacement, all belong to technical solution of the present invention.
Claims (7)
1; a kind of intelligent magnetic kept under voltage protection device (Fig. 1); be to enter step-down rectifier (2) circuit and sample circuit (4) respectively through protective circuit (1) by uniline voltage; the voltage of its step-down rectifier (2) circuit is supplied with single-chip microcomputer (5) through voltage stabilizing circuit (3) and is done power supply; its sample circuit (4) signal is supplied with single-chip microcomputer (5) input; single-chip microcomputer (5) is gathered the current signal in contact circuit (7) back magnitude voltage signals and the current sensor (8) in real time simultaneously; above-mentioned signal is handled by drive coil (6) circuit through Single Chip Microcomputer (SCM) program, makes contact circuit (7) switch on or off the phase line circuit.It is characterized by (Fig. 2), utilize the switch of magnetic latching relay as the disjunction circuit; Utilize Single Chip Microcomputer (SCM) program to realize every function of under voltage protection; Has few arcing processing capacity when utilizing Single Chip Microcomputer (SCM) program to realize consumed power less than 100 milliwatts and contact disjunction circuit.
2, protective circuit according to claim 1 (1) is made up of low-frequency choke coil and TVS pipe, realizes the impact and the High-frequency Interference of anti-transient overvoltage, and its technical characterictic is, low-frequency choke coil is connected in the phase line, and the TVS pipe is connected in parallel on behind the choke grade.
3, the decompression capacitor (C10) of step-down rectifying circuit according to claim 1 (2) lining, its technical characterictic are that capacity parameter is chosen in below the 0.1uf, has reduced the consumption of circuit energy at ordinary times.
4, voltage stabilizing circuit according to claim 1 (3) lining filter capacitor, its technical characterictic be, parameter is chosen in more than the 330uf, and reserve power provides the energy of instantaneous driving magnetic latching relay coil.
5, sample circuit according to claim 1 (4) is made up of diode and resistance, realizes the alternation sampling, and its technical characterictic is, is connected between phase line and the single-chip microcomputer input by the circuit of diode series resistance.
6, single-chip microcomputer according to claim 1 (5) is characterized by, by 8 pin single-chip microcomputers of built in A/D converter and memory.
7, drive coil circuit according to claim 1 (6) is made up of resistance, triode, magnetic latching relay coil, realize of the control of input base current to the output collector current, technical characterictic is, input transistor base series resistance is connected in the single-chip microcomputer output, output triode collector electrode series connection magnetic latching relay coil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410055368 CN1744403A (en) | 2004-09-02 | 2004-09-02 | Intelligent magnetic retaining over under voltage protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410055368 CN1744403A (en) | 2004-09-02 | 2004-09-02 | Intelligent magnetic retaining over under voltage protector |
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| Publication Number | Publication Date |
|---|---|
| CN1744403A true CN1744403A (en) | 2006-03-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200410055368 Pending CN1744403A (en) | 2004-09-02 | 2004-09-02 | Intelligent magnetic retaining over under voltage protector |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102522272A (en) * | 2011-12-26 | 2012-06-27 | 南京觅丹电子信息有限公司 | Intelligent magnetic latching miniature circuit breaker and method for controlling same |
| CN102522273A (en) * | 2011-12-26 | 2012-06-27 | 南京觅丹电子信息有限公司 | Intelligent magnetic latching miniature circuit breaker |
| CN102751694A (en) * | 2011-04-22 | 2012-10-24 | 北京维通利电气有限公司 | Device and method for controlling neutral wire breaking protection |
| WO2013097288A1 (en) * | 2011-12-26 | 2013-07-04 | Liu Zhenyang | Intelligent magnetic latching miniature circuit breaker |
-
2004
- 2004-09-02 CN CN 200410055368 patent/CN1744403A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102751694A (en) * | 2011-04-22 | 2012-10-24 | 北京维通利电气有限公司 | Device and method for controlling neutral wire breaking protection |
| CN102522272A (en) * | 2011-12-26 | 2012-06-27 | 南京觅丹电子信息有限公司 | Intelligent magnetic latching miniature circuit breaker and method for controlling same |
| CN102522273A (en) * | 2011-12-26 | 2012-06-27 | 南京觅丹电子信息有限公司 | Intelligent magnetic latching miniature circuit breaker |
| WO2013097288A1 (en) * | 2011-12-26 | 2013-07-04 | Liu Zhenyang | Intelligent magnetic latching miniature circuit breaker |
| WO2013097287A2 (en) * | 2011-12-26 | 2013-07-04 | Liu Zhenyang | Intelligent magnetic-latching miniature circuit breaker |
| WO2013097289A1 (en) * | 2011-12-26 | 2013-07-04 | Liu Zhenyang | Intelligent magnetic latching miniature circuit breaker and control method therefor |
| WO2013097287A3 (en) * | 2011-12-26 | 2013-08-29 | Liu Zhenyang | Intelligent magnetic-latching miniature circuit breaker |
| CN102522273B (en) * | 2011-12-26 | 2013-12-11 | 南京觅丹电子信息有限公司 | Intelligent magnetic latching miniature circuit breaker |
| CN102522272B (en) * | 2011-12-26 | 2013-12-11 | 南京觅丹电子信息有限公司 | Intelligent magnetic latching miniature circuit breaker and method for controlling same |
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