CN201160214Y - Ultra-underpressure open phase protector - Google Patents
Ultra-underpressure open phase protector Download PDFInfo
- Publication number
- CN201160214Y CN201160214Y CNU2008200040085U CN200820004008U CN201160214Y CN 201160214 Y CN201160214 Y CN 201160214Y CN U2008200040085 U CNU2008200040085 U CN U2008200040085U CN 200820004008 U CN200820004008 U CN 200820004008U CN 201160214 Y CN201160214 Y CN 201160214Y
- Authority
- CN
- China
- Prior art keywords
- phase
- phase electricity
- voltage controller
- thermal relay
- contactor
- 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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Abstract
The utility model relates to an overvoltage, undervoltage and phase lack protector for a three-phase electric appliance. The protector is composed of three-phase electricity, an alternating current contactor, a thermal relay and an electric appliance. The three-phase electricity A, B and C is connected with the electric appliance via the alternating current contactor and the thermal relay in sequence; the thermal relay is connected with the three-phase electricity via a switch and a power supply and voltage controller in sequence, and two normally closed contacts are arranged in the power supply and voltage controller. The potential windings a and b of the power supply and voltage controller are respectively connected with C and B of the three-phase electricity; the phase C of the three-phase electricity is also connected with the terminal b1 of the alternating current contactor; the terminal a1 of the alternating current contactor is connected with the thermal relay, and then connected with the phase A of the three-phase electricity via the switch, the connecting terminal n, and the terminal m of the power supply and voltage controller in sequence. The overvoltage, undervoltage and phase lack protector has the advantages that the design is reasonable; the structure is simple; the protection function can be realized when the undervoltage or the overvoltage situation occurs, and thus the purpose of protection can be truly achieved.
Description
Technical field
The utility model relates to a kind of three-phase electrical appliance ultra under-pressure open phase protector.
Background technology
At present; electromechanical equipments such as all kinds of alternating current motors and water pump all are the three phase mains power supplies; its protective device is to be connected to A.C. contactor in supply line, and wherein the coil windings of A.C. contactor is connected across in wherein the two-phase supply line, three control contacts are connected in the three-phase power line respectively.Since the coil windings of A.C. contactor just with three-phase power line in two be connected, if the third phase supply line of the wiring circle winding phase shortage that opens circuit not, A.C. contactor is operate as normal still, three control closings of contact, continuation is to the power supply of load phase shortage, as the electromechanical equipment of load, as the electrical appliance of motor or water pump one class, because the power supply phase shortage is very easily burnt out.
Summary of the invention
The utility model is intended to overcome the deficiencies in the prior art, and a kind of three-phase electrical appliance ultra under-pressure open phase protector is provided.
Three-phase electrical appliance ultra under-pressure open phase protector of the present utility model is to be made of three-phase electricity, A.C. contactor, thermal relay and electrical appliance.Three-phase electricity A, B, C link to each other through A.C. contactor, thermal relay and electrical appliance successively, and thermal relay is connected with three-phase electricity through switch, supply voltage controller successively, are provided with two normally-closed contacts in the supply voltage controller.
As further improvement of the utility model, potential winding a, the b of described supply voltage controller end is connected with C, the B of three-phase electricity respectively; And the C of three-phase electricity and the b of A.C. contactor
1End links to each other; The a of A.C. contactor
1End is connected with thermal relay, after the wiring n of switch, supply voltage controller holds, hold through m and be connected with the A of three-phase electricity; The two ends of switch link to each other with f with the secondary Chang Kaiduan e of A.C. contactor respectively.
Three-phase electrical appliance ultra under-pressure open phase protector of the present utility model is reasonable in design, simple in structure, can play a protective role when under-voltage, overload, really reaches the purpose of protection.
Description of drawings
Figure of description is the structural representation of the new three-phase electrical appliance ultra under-pressure open phase protector of this practicality.
Embodiment
Three-phase electrical appliance ultra under-pressure open phase protector of the present utility model is to be made of three-phase electricity, A.C. contactor 1, thermal relay 2 and electrical appliance 3.Three-phase electricity A, B, C link to each other through A.C. contactor 1, thermal relay 2 and electrical appliance 3 successively, and thermal relay 2 is connected with three-phase electricity through switch 4, switch 5, supply voltage controller 6 successively, are provided with two normally-closed contact K in supply voltage controller 6
1, K
2Potential winding a, the b end of described supply voltage controller 6 is connected with C, the B of three-phase electricity respectively; And the b of the C of three-phase electricity and A.C. contactor 1
1End links to each other; The a of A.C. contactor 1
1End is connected with thermal relay 2, after the wiring n of switch 4, switch 5, supply voltage controller 6 holds, hold through m and be connected with the A of three-phase electricity; The two ends of switch 4 link to each other with f with the secondary Chang Kaiduan e of A.C. contactor 1 respectively.
Claims (2)
1, three-phase electrical appliance ultra under-pressure open phase protector; be to constitute by three-phase electricity, A.C. contactor (1), thermal relay (2) and electrical appliance (3); it is characterized in that three-phase electricity A, B, C link to each other through A.C. contactor (1), thermal relay (2) and electrical appliance (3) successively; thermal relay (2) is connected with three-phase electricity through switch (4), switch (5), supply voltage controller (6) successively, is provided with two normally-closed contact (K in supply voltage controller (6)
1, K
2).
2, three-phase electrical appliance ultra under-pressure open phase protector as claimed in claim 1 is characterized in that potential winding a, the b end of described supply voltage controller (6) is connected with C, the B of three-phase electricity respectively; And the b of the C of three-phase electricity and A.C. contactor (1)
1End links to each other; The a of A.C. contactor (1)
1End is connected with thermal relay (2), after the wiring n of switch (4), switch (5), supply voltage controller (6) holds, hold through m and be connected with the A of three-phase electricity; The two ends of switch (4) link to each other with f with the secondary Chang Kaiduan e of A.C. contactor (1) respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200040085U CN201160214Y (en) | 2008-02-02 | 2008-02-02 | Ultra-underpressure open phase protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200040085U CN201160214Y (en) | 2008-02-02 | 2008-02-02 | Ultra-underpressure open phase protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201160214Y true CN201160214Y (en) | 2008-12-03 |
Family
ID=40110796
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200040085U Expired - Fee Related CN201160214Y (en) | 2008-02-02 | 2008-02-02 | Ultra-underpressure open phase protector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201160214Y (en) |
-
2008
- 2008-02-02 CN CNU2008200040085U patent/CN201160214Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20081203 |