CN2826783Y - Intelligent magnetic latching single-phase protector for potential difference - Google Patents
Intelligent magnetic latching single-phase protector for potential difference Download PDFInfo
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- CN2826783Y CN2826783Y CN 200520004417 CN200520004417U CN2826783Y CN 2826783 Y CN2826783 Y CN 2826783Y CN 200520004417 CN200520004417 CN 200520004417 CN 200520004417 U CN200520004417 U CN 200520004417U CN 2826783 Y CN2826783 Y CN 2826783Y
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- latching relay
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Abstract
The utility model relates to an intelligent magnetic latching single-phase protector for electrical potential difference, which belongs to the class of low voltage electric appliances. The utility model is a line protecting technology which mainly prevents single-phase line overvoltage and undervoltage which are caused by reasons, such as neutral line failures, unbalanced three-phase voltage, etc. The utility model is characterized in that the protector is arranged at the front end of a single-phase subscriber line, a single chip computer is uses as a controller and a contact terminal of a magnetic latching relay is used as an executing switch. The utility model utilizes programs of the single chip computer to realize line overvoltage protection, line undervoltage protection, few flashover processing, low power consumption, inverse time-limit characteristic and time delay characteristic. The utility model utilizes contact terminal technology to realize rated electric current 40A, 63A, 80A and 100A; within the specified 100MS, overload current bears 10 times of rated current; within the specified 10MS, short-circuit current bears 1000A electric current. The using range of the intelligent magnetic latching single-phase protector is enlarged in a 220V single-phase subscriber line.
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 route protection technology of under voltage.
Background technology:
The state-of-the-art resist technology of domestic present employing; be installed at single-phase circuit user entry place, downstream (in the distribution box), the under voltage protection device; its technique effect is: when circuit took place, automatic line disconnection during under voltage, connect circuit automatically when circuit recovers normal voltage.The disclosed 96117305.X full-automatic single-phase potential error protector of Chinese patent, 00129110.6 intelligent uniphase voltage deviation protector, it is exactly typical case's representative of such protector, all protectors of the type all utilize the on-off switch of electromagnetic type relay as disjunction and connection circuit, because the contact of electromagnetic type relay is the point-contact junction structure, the contact rated current is difficult for surpassing 40A; In 100 milliseconds of times, the rated current of 5 times of overload current less thaies is born in the contact; In 10 milliseconds, 1000 amperes of the short circuit current less thaies that bear the contact; Because the electromagnetic type relay operating state needs coil current to keep work; thereby the consumption of control relay coil circuit is increased; relay coil itself consumes also to be increased; this will have a strong impact on the influence to contact of relay life-span and coil current, make protector complete machine consumed power increase that the life-span also shortens simultaneously.Specification requirement as the 220V line switching of low-voltage electrical apparatus class; protector should be able to bear circuit overload electric current and the short circuit current and the required time of national Specification; obvious above-mentioned protector is reliability, the fail safe that has a strong impact on conveying circuit; make potential safety hazard to circuit; so; this protector only is applicable to the protection (terminal protectors does not require overload current and short circuit current) of terminate load; be not suitable for route protection; therefore, limited the scope of application in the single-phase subscriber's line of 220V.
Summary of the invention:
In order to overcome above technical deficiency, the present invention develops and utilizes Single-chip Controlling magnetic latching relay contact to be series at a kind of protector of 220V uniline, and its characteristics are:
1, at the front end (in the standard container) of single-phase subscriber's line, utilize the switch of magnetic latching relay contact as disjunction circuit and connection circuit, make the rated current of control circuit be respectively 40A, 63A, 80A, 100A.
2, in 100 milliseconds of times, the contact is born overload current and is surpassed 10 times rated current.
3, in 10 milliseconds, the short circuit current that bear the contact is above 1000 amperes.
4, utilize Single Chip Microcomputer (SCM) program control magnetic latching relay contact, realize that line voltage distribution surpasses or the automatic line disconnection of magnetic latching relay contact when being lower than setting, line voltage distribution returns to the characteristics that setting magnetic latching relay contact is connected circuit automatically.
5, utilize Single Chip Microcomputer (SCM) program control magnetic latching relay contact, make contact no matter at the disjunction state or in on-state, relay coil does not all have operating current, makes protector total consumption power less than 100 milliwatts.
6, Single Chip Microcomputer (SCM) program control magnetic latching relay contact has few arcing characteristic when making the contact disjunction or connecting circuit, reduces the infringement of electric arc to contact.
Protector through above-mentioned 6 technology development has reduced the potential safety hazard to conveying circuit, lays a good foundation with other switch cooperation work in the standard container, has improved the scope of application in the single-phase subscriber's line of 220V greatly.
This intelligent magnetic retaining single-plase potential deviation protector (Fig. 1); its composition is to be made up of, lowering and stabilizing blood pressure (6), direct sample (7), single-chip microcomputer (8), magnetic latching relay (9), magnetic latching relay contact (4), four binding posts (1) (2) (3) (5) part.It is characterized by, the protector of being made up of above-mentioned nine parts is installed in the front end of user's uniline, be in the outdoor ammeter box or in the indoor standard container, (1) terminal connects the neutral line of incoming line, (3) terminal connects the phase line of incoming line, (2) be connected user's loaded line with (5) terminal, being connected in the middle of the lead of magnetic latching relay contact (4) series connection and (3) terminal and (5) terminal, (1) terminal directly is connected with lead with (2) terminal, when incoming line generation overvoltage or under voltage, circuit between magnetic latching relay contact (4) disjunction (3) terminal and (5) terminal, when incoming line voltage recovers just often, magnetic latching relay contact (4) is connected circuit between (3) terminal and (5) terminal; Operating characteristicss such as magnetic latching relay contact (4) disjunction circuit or connection circuit or few arcing, the coil of controlling magnetic latching relay (4) after the signal analysis of single-chip microcomputer (8) to direct sample (7) is all arranged, make magnetic latching relay contact (5) and the corresponding actions that obtains.Above-mentioned direct sample circuit (7), it is characterized in that the direct sample circuit is connected by diode carries out halfwave rectifier and connects resistance again and divide the sampling that is crimped onto single-chip microcomputer input on the phase line; Above-mentioned decompression voltage regulator (6) is characterized in that decompression voltage regulator is connected on the phase line by capacitor one end, and the other end is connected on the diode bridge rectifier circuit, and the output of bridge rectifier connects voltage stabilizing didoe; Above-mentioned magnetic latching relay circuit (4), its technical characterictic are that magnetic latching relay circuit is made up of two groups of coils, and an end of each group coil and the output of single-chip microcomputer join other end ground connection.
Description of drawings:
Fig. 1 is the technology of the present invention feature schematic diagram
Label among Fig. 1:
(1) neutral line binding post, (2) loaded line binding post, (3) phase terminal, (4) magnetic latching relay contact, (5) loaded line binding post, (6) decompression voltage regulator (7) direct sample circuit, (8) single chip circuit, (9) magnetic latching relay
Fig. 2 is a technical solution of the present invention hardware circuit embodiment schematic diagram
Label among Fig. 2:
N is the neutral line; L is a phase line; 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.
Fig. 3 is the expanded application hardware circuit embodiment schematic diagram of technical solution 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.
Embodiment:
Below in conjunction with Fig. 2 embodiment explanation, the power supply of uniline passes through current-limiting resistance R12 by the voltage stabilizing of WZ voltage stabilizing didoe again by C10 capacitance decompression and D10-D13 diode rectification, supplies with the DPJ single-chip microcomputer and does the control power supply, simultaneously, then directly supply with the drive coil circuit without the power supply of voltage stabilizing; Line voltage signal by R31 resistance and D21 diode series connection supply DPJ single-chip microcomputer after the program in the DPJ single-chip microcomputer is to signal analysis, drives L2 and L3 coil by Q40, Q41, Q43, Q44, makes the line disconnection of K contact or connects circuit.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, to select the capacity parameter of filter capacitor C12 be to lay in more than the 330uf in order to obtain enough instantaneous energy, this example selection 8 pin single-chip microcomputers.
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 D10-D13 diode rectification, 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.
The main feature of Single Chip Microcomputer (SCM) program is described below in conjunction with Fig. 2 and Fig. 3 embodiment: 1 starts time-histories ordered pair single-chip microcomputer defines, and the characteristic of mating mutually with the peripheral hardware circuit is set; 2 main programs are when detection line voltage overvoltage, under voltage, normal voltage or contact state, and change corresponding program over to and handle; 3 programs when handling contact disjunction circuit or connecting circuit, then make contact the alternating voltage phase place be zero or the current phase zero cross near move (disconnect or connect), contact disconnected or during the connection circuit, have few arcing characteristic; 4 programs are then cancelled the coil current of L2, L3 after contact is finished disjunction or connection task, have no power consumption characteristic.
The main feature of intelligent magnetic retaining single-plase potential deviation protector and technical indicator
1 principal character: be installed in the front end (in the standard container) of single-phase subscriber's line, utilize Single-chip Controlling magnetic latching relay contact, as the execution switch of actions such as disjunction circuit or connection circuit.
2 major technique features: line voltage distribution surpasses the automatic line disconnection of 260 ± 5V, returns to 235 ± 5V and connects circuit automatically; Line voltage distribution is lower than the automatic line disconnection of 170 ± 5V, returns to 200 ± 5V and connects circuit automatically.
3 consumed powers: less than 100MW.
4 rated current: 40A, 63A, 80A, 100A.
5 overload currents: in the 100ms of regulation, bear 10 times rated current.
6 short circuit currents: in the 10ms of regulation, bear the 1000A electric current.
6 operating voltages: AC 0V-450V.
8 few arcing characteristics: contact is zero or the operating characteristics of current phase zero cross near generation disjunction circuit or connection circuit in the alternating voltage phase place.
9 anti-time limit characteristics: circuit is crossed, the under voltage value is big more, and disjunction is fast more operate time.
10 time-delay characteristics: have 3 minutes accurately kinds and start between time-delay.
The above; it only is preferred embodiment of the present invention; be not to pro forma restriction of the present invention; every single-chip microcomputer that utilizes is as controller; the magnetic latching relay contact is as carrying out switch; carry out the front end that switch series is coupled to the 220V uniline, the power consumption equipment in circuit and the circuit is carried out a kind of mistake, under voltage protection technology, all belong to technical solution of the present invention.
Claims (4)
1, a kind of intelligent magnetic retaining single-plase potential deviation protector, its composition be by, lowering and stabilizing blood pressure, direct sample, single-chip microcomputer, magnetic latching relay, magnetic latching relay contact, four binding posts are partly formed, it is characterized by, the protector of being made up of above-mentioned nine parts is installed in the front end of user 220V uniline, be in the outdoor ammeter box or indoor standard container in, wherein two terminals connect the neutral line and the phase line of incoming lines, two other terminal connects user's loaded line; The terminal that links to each other with the neutral line directly is connected with lead, and the magnetic latching relay contact is connected on the centre that connects the phase terminal lead; When incoming line generation overvoltage or under voltage, the phase line of magnetic latching relay contact disjunction circuit, when incoming line voltage recovers just often, the magnetic latching relay contact is connected the phase line of circuit; Magnetic latching relay contact disjunction circuit or connect circuit or few arcing operating characteristics, all have single-chip microcomputer to the signal analysis of direct sample after the coil of control magnetic latching relay, make the magnetic latching relay contact and the corresponding actions that obtains.
2, according to the described intelligent magnetic retaining single-plase potential deviation protector of claim 1, it is characterized in that the direct sample circuit is connected by diode carries out halfwave rectifier and connects resistance again and divide the sampling that is crimped onto single-chip microcomputer input on the phase line.
3, intelligent magnetic retaining single-plase potential deviation protector according to claim 1; it is characterized in that decompression voltage regulator is connected on the phase line by capacitor one end; the other end is connected on the diode bridge rectifier circuit, and the output of bridge rectifier connects voltage stabilizing didoe.
4, intelligent magnetic retaining single-plase potential deviation protector according to claim 1, its technical characterictic are that magnetic latching relay circuit is made up of two groups of coils, and an end of each group coil and the output of single-chip microcomputer join other end ground connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520004417 CN2826783Y (en) | 2005-02-06 | 2005-02-06 | Intelligent magnetic latching single-phase protector for potential difference |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520004417 CN2826783Y (en) | 2005-02-06 | 2005-02-06 | Intelligent magnetic latching single-phase protector for potential difference |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2826783Y true CN2826783Y (en) | 2006-10-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520004417 Expired - Lifetime CN2826783Y (en) | 2005-02-06 | 2005-02-06 | Intelligent magnetic latching single-phase protector for potential difference |
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| CN (1) | CN2826783Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103515926A (en) * | 2013-10-22 | 2014-01-15 | 无锡华阳科技有限公司 | Inverse-time-lag overvoltage protection device |
-
2005
- 2005-02-06 CN CN 200520004417 patent/CN2826783Y/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103515926A (en) * | 2013-10-22 | 2014-01-15 | 无锡华阳科技有限公司 | Inverse-time-lag overvoltage protection device |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20150206 Granted publication date: 20061011 |