CN202678932U - Three-phase solid-state relay with missing phase-preventing function - Google Patents
Three-phase solid-state relay with missing phase-preventing function Download PDFInfo
- Publication number
- CN202678932U CN202678932U CN2012203754187U CN201220375418U CN202678932U CN 202678932 U CN202678932 U CN 202678932U CN 2012203754187 U CN2012203754187 U CN 2012203754187U CN 201220375418 U CN201220375418 U CN 201220375418U CN 202678932 U CN202678932 U CN 202678932U
- Authority
- CN
- China
- Prior art keywords
- phase
- circuit
- signal
- missing
- open
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
The utility model provides a three-phase solid-state relay with a missing phase-preventing function. The three-phase solid-state relay with the missing phase-preventing function comprises a connecting terminal, a data-processing ECU (Electronic Control Unit) circuit, a photoelectric isolating Opt circuit, a missing phase-detecting circuit, a thyristor SCR (Silicon Controlled Rectifier) and a protective element which are mutually connected, wherein the connecting terminal is used for receiving an external sensor signal and transmitting an original signal to a data-processing device; after the processed signal is isolated by the photoelectric isolating circuit, the trigger signal triggers the thyristor to switch on for work; and in the whole process, the missing phase-detecting circuit monitors whether power input has a missing phase phenomenon. When the missing phase phenomenon happens, an STA (Static Timing Analysis) end outputs direct current to supply working power to the alarm device; a control voltage is directly input into a CONT (control) end, so that the three-phase solid-state relay with the missing phase-preventing function can be used on an occasion where missing phase detection is not required; and the three-phase solid-state relay with the missing phase-preventing function is simple and stable in circuit and has wide application and popularization potentials.
Description
Affiliated technical field
The utility model relates to a kind of relay, especially can be in three-phase input any one automatically protection and the three-phase solid relay of reporting to the police when mutually open-phase fault occuring.
Background technology
At present, owing in the abominable occasion of some operating mode, because three-phase power supply system breaks down, cause threephase load in work power supply in service arbitrary mutually unexpected phase shortage to be arranged, cause threephase load to work, in the situation of frequent occurrence phase shortage even can be with the threephase load permanent damage.The generation of traditional reply phase shortage phenomenon, easy mode are to use fuse, but that its shortcoming is reaction speed is slow, Reliability of Microprocessor is poor, are inapplicable for the load appliance of precision; Or the special-purpose open phase protector of use, its shortcoming is that acquisition cost is expensive, and wiring is loaded down with trivial details, and equipment volume is larger etc., is unfavorable for the production application of each medium-sized and small enterprises.Solid-state relay is as contactless, no-spark, noiseless, and without electromagnetic interference, switching speed is fast, and the novel electron switch that antijamming capability is strong is of wide application.But because the in the past restriction of technical conditions is difficult to accomplish default-phase protection function is combined with solid-state relay.Someone once realized default-phase protection function with the mode that three luminous neon bulbs link to each other with dropping resistor, although can realize this function, it is owing to complex manufacturing, and manufacturing cost is higher, and the product defects rate is higher, is difficult to extensive popularization.
Summary of the invention
Can not realize detecting open-phase fault and start the automatically deficiency of protection in order to overcome existing solid-state relay; the utility model provides a kind of open-phase protection three-phase solid relay; this three-phase solid relay can not only detect three phase mains and open-phase fault whether occur; can also timely and effectively the load supplying loop be disconnected; guaranteed the safeguard protection to power consumption equipment, and the power supply of warning device is provided.
The technical scheme that its technical problem that solves the utility model adopts is: by binding post 4 pin and 2 pin access 12-24VDC signal, signal is after data processing unit ECU chip is processed, if phase shortage alarm signal PHFL is low level, then data processing unit ECU enters the photoelectricity isolated location with triggering signal TRIG with the form of high level.The central role of photoelectric isolating circuit is in the situation of electricity isolation, transmit signal take light as medium, can isolate the input and output circuit, thereby can effectively suppress system noise, eliminate the interference of grounded circuit, have that response speed is very fast, the life-span is long, the little benefit such as shock-resistant of volume, thyristor triggering signal TRIG is sent to the forceful electric power loop from weak electrical loop undistortedly.Synchronous working when three road thyristors are subject to triggering signal TRIG is connected three-phase major loop forceful electric power R, S, T.Work under the protection of deadlocked dose of epoxy resin in whole work loop, so that circuit safety, stable is not disturbed by external factor.
The beneficial effects of the utility model are, can be in the situations of three phase supply power phase shortage, and disconnecting consumers power supply timely and effectively, the output DC source is for warning device work simultaneously, and the circuit simple and stable can significantly be enhanced productivity.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further specified.
Fig. 1 is circuit theory diagrams of the present utility model.
Fig. 2 is the intact phase time circuit waveform of three-phase figure.
Fig. 3 is embodiment of the present utility model system pie graph
1. test contact among the figure, 2. insulation crust, 3. spring, 4. concentric resistance, 5. current-limiting resistance, 6. shunt resistance, 7. identification electrode, 8. neon tube, 9. spring, 10. bonnet, 11. hand touched electrode, 12. dielectric isolation layers, 13. springs.
Embodiment
By binding post 4 pin and 2 pin access 12-24VDC signal, signal is after data processing unit ECU chip is processed, if phase shortage alarm signal PHFL is low level, then data processing unit ECU enters the photoelectricity isolated location with triggering signal TRIG with the form of high level.The central role of photoelectric isolating circuit is in the situation of electricity isolation, transmit signal take light as medium, can isolate the input and output circuit, thereby can effectively suppress system noise, eliminate the interference of grounded circuit, have that response speed is very fast, the life-span is long, the little benefit such as shock-resistant of volume, thyristor triggering signal TRIG is sent to the forceful electric power loop from weak electrical loop undistortedly.Synchronous working when three road thyristors are subject to triggering signal TRIG is connected three-phase major loop forceful electric power R, S, T.
When three-phase input voltage was normal, its three-phase was inputted phase voltage waveform as shown in Figure 2, in interval T1, and U
A＞U
C＞U
B, the A phase voltage is maximum, and the B phase voltage is minimum, therefore, the optocoupler D in Fig. 1
1With diode VD
5Conducting, at this moment, control signal U
CBe low level, when the time from T
1Enter T
2When interval, U
A＞U
B＞U
C, the A phase voltage is maximum, and the C phase voltage is minimum, therefore, the optocoupler D in Fig. 1
1With diode VD
4Conducting, U
CBe low level, so analogize, at interval T
3, T
4, T
5, T
6The time, U
CBe low level.So, in a power cycle, U
CBe low level, that is to say, when three-phase input voltage is normal (not phase shortage), U
CBe low level, be low level thereby make phase shortage alarm signal PHFL always, and the expression input is normal.
When the three-phase input voltage phase shortage, owing to lack the C phase time, line voltage only has U
ABOne phase is worked as U
ABWhen near zero-crossing point, optocoupler D
1Not conducting, all the other two also not conductings of optocoupler, at this moment, control signal U
CBeing high level, is high level thereby make phase shortage alarm signal PHFL, and the expression input phase failure send data processing unit ECU to process.
Claims (6)
1. an open-phase protection three-phase solid relay under epoxy encapsulation, is interconnected by binding post, data processing equipment ECU, photoelectricity isolation Opt circuit, lack detection circuit, thyristor SCR and protection component RC; It is characterized in that: binding post receives the external sense signal, primary signal is sent to data processes the ECU unit, and the signal after processing is processed triggers thyristor SCR conducting work by triggering signal TRIG after the isolation of photoelectricity isolation Opt circuit; In whole process, there is the input of lack detection circuit monitoring power supply the phase shortage phenomenon whether to occur.
2. open-phase protection three-phase solid relay according to claim 1; it is characterized in that: the 4th pin by the four-core binding post is anodal; input 12-24V direct current signal; with signal input data processing circuit ECU chip; under the lack detection circuit effect, judge whether further to provide thyristor SCR triggering signal TRIG simultaneously.
3. open-phase protection three-phase solid relay according to claim 1 is characterized in that: by the signal after the data processing unit ECU processing, through photoelectric coupling Opt circuit, with three road thyristor SCR major loop triggering and conducting in the three-phase circuit.
4. open-phase protection three-phase solid relay according to claim 1; it is characterized in that: after the phase shortage situation occurs; lack detection circuit feeds back to the PHFL high level rapidly data and processes the ECU unit, cuts off immediately the thyristor triggering signal TRIG in the photoelectric coupling Opt loop simultaneously.
5. open-phase protection three-phase solid relay according to claim 1 is characterized in that: can not occur under the work condition environment of power phase shortage, will control voltage and directly input the CONT end, then also can make easily common 3 phase AC solid relay and use.
6. open-phase protection three-phase solid relay according to claim 1 is characterized in that: the PHFL high level signal that lack detection circuit produces, behind the ECU unit, by triode and voltage-stabiliser tube with the STA end of DC signal output to the four-core binding post; STA holds d. c. indicator light, buzzer, the relay of external operating voltage 3-24Vdc, or is connected with other automatic control equipment, makes alarm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012203754187U CN202678932U (en) | 2012-07-30 | 2012-07-30 | Three-phase solid-state relay with missing phase-preventing function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012203754187U CN202678932U (en) | 2012-07-30 | 2012-07-30 | Three-phase solid-state relay with missing phase-preventing function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202678932U true CN202678932U (en) | 2013-01-16 |
Family
ID=47499807
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012203754187U Expired - Fee Related CN202678932U (en) | 2012-07-30 | 2012-07-30 | Three-phase solid-state relay with missing phase-preventing function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202678932U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104678860A (en) * | 2015-02-11 | 2015-06-03 | 哈尔滨工业大学 | CPLD-based protection relay in AC and open-phase protection system |
-
2012
- 2012-07-30 CN CN2012203754187U patent/CN202678932U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104678860A (en) * | 2015-02-11 | 2015-06-03 | 哈尔滨工业大学 | CPLD-based protection relay in AC and open-phase protection system |
| CN104678860B (en) * | 2015-02-11 | 2017-05-24 | 哈尔滨工业大学 | CPLD-based protection relay in AC and open-phase protection system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204290310U (en) | A kind of oppositely ground protection circuit and ground-fault interrupter | |
| CN202770920U (en) | Alternating current vacuum contactor adhesion detection device | |
| CN203521788U (en) | Electric leakage over-current protection socket | |
| CN204216675U (en) | Based on power distribution cabinet electric leakage monitoring and the guard system of CAN formula | |
| CN101420113A (en) | Three phase electric power protector having counting and timing function | |
| CN103713232A (en) | Intelligent alarm capable of preventing battery reverse polarity | |
| CN203561857U (en) | Low-power standby control system | |
| CN103308755B (en) | The insulation detection device of high voltage direct current remote electric power system and method | |
| CN203071901U (en) | Three-phase solid-state relay | |
| CN202678932U (en) | Three-phase solid-state relay with missing phase-preventing function | |
| CN205753342U (en) | Earth leakage protective device | |
| CN205231816U (en) | Rifle control box charges | |
| CN204230865U (en) | A kind of motor protecting device | |
| CN203276459U (en) | Electrical fire monitoring detector having overvoltage under-voltage detecting and protective functions | |
| CN204290313U (en) | A kind of building DC power supply | |
| CN104682334A (en) | Guard grating circuit and lamp | |
| CN201638340U (en) | Fire prevention pre-alarm device for machine room of base station | |
| CN203069712U (en) | Fault indication apparatus | |
| CN201336554Y (en) | Three-phase power-supply protector with functions of counting and timing | |
| CN103529349A (en) | Break monitoring device for protection circuit of switch cabinet | |
| CN102495364B (en) | Detection device of three-phase fuse | |
| CN203502536U (en) | Switch cabinet protection circuit broken line monitoring device | |
| CN202094621U (en) | Intelligent monitoring type surge protector | |
| CN204695489U (en) | Multiloop fire detecting arrangement | |
| CN113064360A (en) | Microcomputer motor protection monitoring device with residual current type electric fire monitoring and detecting function |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20130116 Termination date: 20140730 |
|
| EXPY | Termination of patent right or utility model |