CN2152332Y - Motor protector - Google Patents
Motor protector Download PDFInfo
- Publication number
- CN2152332Y CN2152332Y CN 93204804 CN93204804U CN2152332Y CN 2152332 Y CN2152332 Y CN 2152332Y CN 93204804 CN93204804 CN 93204804 CN 93204804 U CN93204804 U CN 93204804U CN 2152332 Y CN2152332 Y CN 2152332Y
- Authority
- CN
- China
- Prior art keywords
- motor
- circuit
- time delay
- utility
- model
- 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
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- Motor And Converter Starters (AREA)
- Protection Of Generators And Motors (AREA)
Abstract
The utility model provides a motor protector which comprises a motor protecting circuit, a time delay self-starting circuit, and terminals 1, 2, 3, 4, and an initialize switch, a time delay circuit and a relay SJ connected with the time delay circuit are particularly added. The utility model can realize the automatic starting function of a motor by utilizing the time delay self-starting circuit to ensure that after the power of local power network is cut off, the motor can start working automatically when the power supply is restored, so that the automatic run of the electric motor is realized. In addition, the motor protective circuit can protect the motor, and once the motor is powered on or runs out of order, the motor can be protected from damage. The utility model with the advantages of simple circuit and safety is suitable for mass industrial production.
Description
The utility model relates to a kind of motor protector, particularly a kind of motor protector that has the self-starting function of delaying time.
At present, motor protector all is protective devices such as single overload, overvoltage, the phase failure, and when motor operation or power not normally, protection makes motor exempt from damage at once.As Chinese patent GG87206216.But in use, often find because partial electric grid has a power failure, and motor is shut down, need manually start when sending a telegram here once again, motor could recover running, and this uses the occasion of motor for field, dispersion, large tracts of land, for the duty personnel, workload is well imagined.
The purpose of this utility model is to provide a kind of motor protector, especially when local grid power blackout, and when sending a telegram here once again, the motor protector that motor can start voluntarily.
The utility model is achieved in that can preset " manually " and " automatically " two states by change over switch on existing protector GG87206216; under " automatically " state; when electrical network was sent a telegram here once again, the delay circuit that is made of the monostable circuit that increases was after time-delay after a while; connect the protective circuit power supply; make motor start-up, start the back if any abnormal conditions, protective circuit is turn-offed motor power; implement protection, make motor exempt from damage.
Because the utility model has reasonably been handled the relation of self-starting and motor protector, and they are organically combined, make easy to use and keep the safety in production all to be met, but also duty personnel's workload and intensity all are improved.In addition, this circuit is simple, and reliable, cost is low, is applicable to industrial production in enormous quantities.
Fig. 1 is the utility model circuit theory diagrams
Fig. 2 is that the utility model uses installation diagram
As Fig. 2, state prewired K switch can provide working power to " automatically " and " manually " respectively by general supply, and under auto state, power supply is by contact 1,4 transformer B
1Give the monostable time delay circuit supply; the monostable time delay circuit that constitutes by NE555; rigidly connecting energize; or when sending a telegram here once again; time-delay charging capacitor C both end voltage is very low; NE555 6; 2 pin are high potential; so 3 pin output low levels; relay SJ normally opened contact is turn-offed; protective circuit does not have power supply; motor is failure to actuate; after a period of time; time-delay charging capacitor C both end voltage raises; make NE555 6; 2 pin are electronegative potential; so 3 pin output high level; make the adhesive of relay SJ normally opened contact, protective circuit is by normally opened contact SJ; terminals 1; 3 obtain power supply, protective circuit work; by protection relay normally-closed contact J; also make A.C. contactor JC by contact 2; 3; normally-closed contact and terminals 1; 2 protection relay J that is connected and terminals 3; the 4 time-delay relay SJ energized that are connected, the A.C. contactor adhesive makes motor start-up work; power as motor; running is unusual; motor protecting circuit, protection is at once turn-offed protection relay; A.C. contactor is turn-offed, thereby the protection motor exempt from damage.
Claims (1)
1, a kind of motor protector comprises: motor protecting circuit, and terminals 1,2,3,4 is characterized in that it also comprises:
A, a monostable circuit as time-delay,
B, relay coil is connected with the monostable circuit output, the relay SJ that relay normally open contact is connected with terminals 3,4,
C, the motor protecting circuit power supply is connected with terminals 1,3,
D, the normally-closed contact of the protection relay J of motor protecting circuit is connected with terminals 1,2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93204804 CN2152332Y (en) | 1993-02-26 | 1993-02-26 | Motor protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93204804 CN2152332Y (en) | 1993-02-26 | 1993-02-26 | Motor protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2152332Y true CN2152332Y (en) | 1994-01-05 |
Family
ID=33788247
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93204804 Expired - Fee Related CN2152332Y (en) | 1993-02-26 | 1993-02-26 | Motor protector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2152332Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102035519A (en) * | 2010-10-26 | 2011-04-27 | 苏州科技学院 | Automatic elastic starter |
-
1993
- 1993-02-26 CN CN 93204804 patent/CN2152332Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102035519A (en) * | 2010-10-26 | 2011-04-27 | 苏州科技学院 | Automatic elastic starter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C20 | Patent right or utility model deemed to be abandoned or is abandoned | ||
| CF01 | Termination of patent right due to non-payment of annual fee |