CN2580649Y - Protector able to meter three-phase AC motor - Google Patents
Protector able to meter three-phase AC motor Download PDFInfo
- Publication number
- CN2580649Y CN2580649Y CN 02284106 CN02284106U CN2580649Y CN 2580649 Y CN2580649 Y CN 2580649Y CN 02284106 CN02284106 CN 02284106 CN 02284106 U CN02284106 U CN 02284106U CN 2580649 Y CN2580649 Y CN 2580649Y
- Authority
- CN
- China
- Prior art keywords
- motor
- circuit
- processing circuit
- signal processing
- phase
- 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
Abstract
The utility model relates to a protector capable of metering of a three-phase AC motor. The input end of a current signal processing circuit is connected with a three-phase current transformer; a voltage signal processing circuit is provided with a three-phase voltage sampling end of the motor; the current signal processing circuit and the output end of the voltage signal processing circuit are accessed with an SCM processing circuit which is respectively connected with a protection and control circuit of the motor, a display, and a protection parameter setting circuit; the SCM processing circuit is provided with an electric energy metering unit and a motor protecting and distinguishing unit. Because the utility model adopts an integral arrangement, the three-phase motor protector also has the metering function so as to avoid the waste caused by the overlapped arrangement of some elements of each device with the single function and to simplify and reduce a control cabinet. The utility model has the advantages of simple installation and maintenance, and convenient operation, and all the factors cause the use cost of the motor to be greatly reduced.
Description
One, technical field
The utility model relates to a kind of motor protector.
Two, background technology
Alternating current machine in use for motor is not damaged, must use protector, and normally used protector has the mechanical type thermal protector, and electronic type overcurrent, overvoltage, under-voltage protection device, three phase electric machine also need have the phase failure (or uneven) protector.And,, in the motor use, except that the needs electric motor protecting, also need grasp the energy consumption or the efficient of other dragging system as fields such as weaving, the energy, machinery, mine, waterpower, buildings in a lot of occasions.Therefore, must increase the kilowatt-hour meter that uses the metering electric weight.Generally, in control cubicle, not only motor protecter is housed but also kilowatt-hour meter is housed, the electric wire of control cubicle is assorted many, and volume is very big.In fact motor protecter has a lot of identical devices with kilowatt-hour meter, as: power supply, current transformer, treatment circuit, casing etc.These overlapping parts cause very big waste.Owing to be not a table, use also inconvenient.
Three, summary of the invention
The purpose of this utility model provides a kind of three-phase alternating current motor protector that can measure that motor metering circuit and protective circuit can be taked integrated setting.
The utility model comprises threephase current transformer, the current signal treatment circuit, voltage signal processing circuit, the electric motor protecting control circuit, protection parameter setting circuit, display, the input of described current signal treatment circuit connects threephase current transformer, voltage signal processing circuit has motor three-phase voltage sampling end, it is characterized in that, the output of current signal treatment circuit and voltage signal processing circuit inserts the single-chip microcomputer treatment circuit, and the single-chip microcomputer treatment circuit links to each other with electric motor protecting control circuit, display, protection parameter setting circuit respectively; The single-chip microcomputer treatment circuit has electric energy metrical unit and electric motor protecting judgement unit.
During machine operation, threephase current transformer with current of electric with proportionate relationship sampling input current signal treatment circuit, the voltage sampling end is with motor voltage signal input voltage signal treatment circuit, current signal treatment circuit and voltage signal processing circuit are imported the single-chip microcomputer treatment circuit with processing signals separately respectively, through electric energy metrical unit wherein current of electric and voltage signal calculation process being sent into display, show the motor power consumption with kilowatt hour (degree); Differentiate whether enter guard mode as calculated through electric motor protecting judgement unit is wherein set motor current signal and voltage signal according to the parameter setting circuit electric motor protecting parameter; when overcurrent, overvoltage, under-voltage, the phase failure occurring; on the one hand this guard signal is sent display to show reason; simultaneously the electric motor protecting control circuit is provided control signal; the electric motor protecting control circuit is controlled output immediately and is cut off motor power, and motor is protected.
The utility model is owing to adopt integrated setting; make three-phase motor protector have the function of metering again; avoided that some device of device of each simple function is overlapping to be provided with the waste of being made; simplify and dwindled control cubicle; and make installation, safeguard simple and easy; easy to use, so many factors greatly descend the use cost of motor.
Four, description of drawings
Accompanying drawing is a circuit structure block diagram of the present utility model.
Claims (1)
- A kind of three-phase alternating current motor protector that can measure; comprise threephase current transformer; the current signal treatment circuit; voltage signal processing circuit; the electric motor protecting control circuit; protection parameter setting circuit; display; the input of described current signal treatment circuit connects threephase current transformer; voltage signal processing circuit has motor three-phase voltage sampling end; it is characterized in that the output of current signal treatment circuit and voltage signal processing circuit inserts the single-chip microcomputer treatment circuit, the single-chip microcomputer treatment circuit respectively with the electric motor protecting control circuit; display; protection parameter setting circuit links to each other: the single-chip microcomputer treatment circuit has electric energy metrical unit and electric motor protecting judgement unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02284106 CN2580649Y (en) | 2002-11-05 | 2002-11-05 | Protector able to meter three-phase AC motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02284106 CN2580649Y (en) | 2002-11-05 | 2002-11-05 | Protector able to meter three-phase AC motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2580649Y true CN2580649Y (en) | 2003-10-15 |
Family
ID=33745535
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02284106 Expired - Fee Related CN2580649Y (en) | 2002-11-05 | 2002-11-05 | Protector able to meter three-phase AC motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2580649Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101593965B (en) * | 2008-05-26 | 2012-05-23 | 鞍钢集团矿业公司 | Intelligent low-voltage motor protector with function of electric energy measurement |
| CN106849012A (en) * | 2017-02-15 | 2017-06-13 | 南京越博动力***股份有限公司 | A kind of integrated protector for electric motor and its guard method based on singlechip technology |
-
2002
- 2002-11-05 CN CN 02284106 patent/CN2580649Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101593965B (en) * | 2008-05-26 | 2012-05-23 | 鞍钢集团矿业公司 | Intelligent low-voltage motor protector with function of electric energy measurement |
| CN106849012A (en) * | 2017-02-15 | 2017-06-13 | 南京越博动力***股份有限公司 | A kind of integrated protector for electric motor and its guard method based on singlechip technology |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |