CN2826787Y - Ultra under-voltage lack phase protector for three-phase electrical appliance - Google Patents
Ultra under-voltage lack phase protector for three-phase electrical appliance Download PDFInfo
- Publication number
- CN2826787Y CN2826787Y CN 200520122574 CN200520122574U CN2826787Y CN 2826787 Y CN2826787 Y CN 2826787Y CN 200520122574 CN200520122574 CN 200520122574 CN 200520122574 U CN200520122574 U CN 200520122574U CN 2826787 Y CN2826787 Y CN 2826787Y
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- China
- Prior art keywords
- phase
- electrical appliance
- contactor
- protector
- utility
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Abstract
The utility model relates to an ultra under-voltage lack phase protector for a three-phase electrical appliance, particularly a safety electricity consumption protector for the three-phase electrical appliance. A power supply voltage controller is additionally arranged among an alternating current contactor, three-phase electricity and a starting and stopping switch. Consequently, the defects of unreasonable structure, hysteretic operation and easy ageing of a coil of a motor existing in the prior art are solved. The utility model has the advantages that the utility model not only can play a protect action in undervoltage and overload, but also can immediately and automatically cut off the power supply in phase lack, overpressure, lightning strike and short circuit, and consequently, the purpose of lack phase protection can be verily obtained. The utility model has the advantages of reasonable structure and low cost.
Description
Affiliated technical field
The utility model belongs to a kind of three-phase electric apparatus safety electricity consumption protector, particularly a kind of three-phase electrical appliance ultra under-pressure open phase protector.
Background technology
At present; known three-phase asynchronous motor open-phase protect device is generally the magnetic starter air switch; only superelevation or ultralow power supply are sent to motor because of it when ultra under-pressure, thunderbolt, the motor water inlet, after the temperature-sensitive element feedback, could disconnect dynamo-electric source by the time.Thereby the defective that exists unreasonable structure, action hysteresis, motor winding easily to wear out and burn.
Summary of the invention
In order to overcome the above-mentioned defective of present known three-phase asynchronous motor open-phase protect device; the utility model provides a kind of improved three-phase electrical appliance ultra under-pressure open phase protector; it not only can play a protective role when ultra under-pressure, overload; and when phase shortage, can cut off the electricity supply automatically immediately, really reach the purpose of open-phase protection.
The technical scheme that its technical problem that solves the utility model adopts is: comprise A.C. contactor that links to each other with three-phase electricity and the thermal relay that links to each other with electrical appliance with A.C. contactor; and the three-phase electrical appliance ultra under-pressure open phase protector that is connected the startup shutdown switch between A.C. contactor and the thermal relay; its design feature is also to be provided with a supply voltage controller between A.C. contactor, three-phase electricity and startup shutdown switch, and is provided with two normally-closed contacts in it.And a kind of in the voltmeter of remodeling and the voltage relay of remodeling of described supply voltage controller.Potential winding a, the b end of described supply voltage controller is connected with C, the B of three-phase electricity respectively; And the C of three-phase electricity links to each other with the b1 of A.C. contactor end; And the a1 of A.C. contactor end by thermal relay after connect shutdown switch, starting switch links to each other with wiring 2 ends of supply voltage controller; Wiring 2 ends of supply voltage controller by two normally-closed contacts after and be connected with the A of three-phase electricity through wiring 1 end; The two ends of starting switch are often opened 2 ends with the pair of A.C. contactor respectively and are linked to each other with 1 end.Described electrical appliance is a kind of in the electrical appliances such as motor, distribution board and step-down side.
The beneficial effects of the utility model are: because of it has increased a special supply voltage controller on the basis of existing magnetic starter.Thereby not only the time can play a protective role, and when phase shortage superpressure, thunderbolt, short circuit, can cut off the electricity supply automatically immediately, really reach the purpose of open-phase protection in under-voltage, overload.The utility model is rational in infrastructure, and cost is low, is suitable for and three-phase electrical appliances such as threephase motor, transformer, very easily application.
Description of drawings:
Fig. 1 is a structural representation of the present utility model
Among the figure: 1, A.C. contactor; 2, thermal relay; 3, electrical appliance; 4, starting switch; 5, shutdown switch; 6, supply voltage controller; A, B, C are the three-phase electricity live wire; A, b are the two ends of supply voltage controller potential winding; A1, b1 are the two ends of A.C. contactor solenoid; M, n are wiring 1,2 ends of supply voltage controller; F, e are 1,2 ends that the same pair of A.C. contactor is often left.
Embodiment:
As shown in Figure 1; comprise A.C. contactor (1) that links to each other with three-phase electricity A, B, C and the thermal relay (2) that links to each other with motor (3) with A.C. contactor (1); and the three-phase electrical appliance ultra under-pressure open phase protector that is connected the startup shutdown switch (4,5) between A.C. contactor (1) and the thermal relay (2); its design feature is the voltage relay (6) that also is provided with a remodeling between A.C. contactor (1), three-phase electricity A, B, C and startup shutdown switch (4,5), and is provided with two normally-closed contact (k in it
1, k
2).Potential winding a, the b end of described voltage relay (6) is connected with C, the B of three-phase electricity respectively; And the C of three-phase electricity links to each other with the b1 end of A.C. contactor (1); And the a1 of A.C. contactor (1) end by thermal relay (2) after connect shutdown switch (5), starting switch (4) links to each other with wiring 2 ends (n) of voltage relay (6); Wiring 2 ends (n) of voltage relay (6) are by two normally-closed contact (k
2, k
1) afterwards and through wiring 1 end (m) be connected with the A of three-phase electricity; The two ends of starting switch (4) are often opened 2 ends (e) with the same pair of A.C. contactor (1) respectively and are linked to each other with 1 end (f).
During use, when three phase mains exceeded setting range, voltage relay (6) potential winding magnetic flux density increased and with normally-closed contact (k
2) open, cause the solenoid of A.C. contactor (1) to cut off simultaneously; And when three phase mains was lower than setting range, voltage relay (6) potential winding magnetic flux density weakened and with normally-closed contact (k
1) open, the solenoid of A.C. contactor (1) is cut off simultaneously.
Claims (5)
1, a kind of three-phase electrical appliance ultra under-pressure open phase protector; comprise A.C. contactor (1) that links to each other with three-phase electricity A, B, C and the thermal relay (2) that links to each other with electrical appliance (3) with A.C. contactor (1); and be connected startup shutdown switch (4,5) between A.C. contactor (1) and the thermal relay (2); it is characterized in that between A.C. contactor (1), three-phase electricity A, B, C and startup shutdown switch (4,5), also being provided with a supply voltage controller (6), and be provided with two normally-closed contact (k in it
1, k
2).
2, three-phase electrical appliance ultra under-pressure open phase protector as claimed in claim 1 is characterized in that a kind of in the voltmeter of remodeling and the voltage relay of remodeling of described supply voltage controller (6).
3, 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 C of three-phase electricity links to each other with the b1 end of A.C. contactor (1); And the a1 of A.C. contactor (1) end by thermal relay (2) after connect shutdown switch (5), starting switch (4) links to each other with wiring 2 ends (n) of supply voltage controller (6); Wiring 2 ends (n) of supply voltage controller (6) are by two normally-closed contact (k
2, k
1) afterwards and through wiring 1 end (m) be connected with the A of three-phase electricity; The two ends of starting switch (4) are often opened 2 ends (e) with the pair of A.C. contactor (1) respectively and are linked to each other with 1 end (f).
4, three-phase electrical appliance ultra under-pressure open phase protector as claimed in claim 1 is characterized in that described electrical appliance (3) is a motor.
5, three-phase electrical appliance ultra under-pressure open phase protector as claimed in claim 1 is characterized in that a kind of in distribution board and the step-down side electrical appliance of described electrical appliance (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520122574 CN2826787Y (en) | 2005-10-22 | 2005-10-22 | Ultra under-voltage lack phase protector for three-phase electrical appliance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520122574 CN2826787Y (en) | 2005-10-22 | 2005-10-22 | Ultra under-voltage lack phase protector for three-phase electrical appliance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2826787Y true CN2826787Y (en) | 2006-10-11 |
Family
ID=37066970
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520122574 Expired - Fee Related CN2826787Y (en) | 2005-10-22 | 2005-10-22 | Ultra under-voltage lack phase protector for three-phase electrical appliance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2826787Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104037725A (en) * | 2014-06-25 | 2014-09-10 | 江南嘉捷电梯股份有限公司 | Elevator safeguard detector |
-
2005
- 2005-10-22 CN CN 200520122574 patent/CN2826787Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104037725A (en) * | 2014-06-25 | 2014-09-10 | 江南嘉捷电梯股份有限公司 | Elevator safeguard detector |
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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 |