CN205142057U - Star - triangle starting circuit - Google Patents
Star - triangle starting circuit Download PDFInfo
- Publication number
- CN205142057U CN205142057U CN201520842130.XU CN201520842130U CN205142057U CN 205142057 U CN205142057 U CN 205142057U CN 201520842130 U CN201520842130 U CN 201520842130U CN 205142057 U CN205142057 U CN 205142057U
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- Prior art keywords
- contactor
- main
- triangle
- star
- normally
- Prior art date
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Abstract
The utility model discloses a star - triangle starting circuit, three -phase power line L1, L2, L3 is connected with main contactor KM's main contacts through main switch QS and fusing FU1, main contactor KM's main contacts is connected with electrothermal relay KTH all the way, electrothermal relay KTH is connected with three phase motor's winding, another way of main contactor KM's main contacts is connected with triangle -shaped starting contactor KM triangle's main contacts, triangle -shaped starting contactor KM triangle and three phase motor's winding constitution triangle -shaped are connected, three phase motor's winding still with star starting contactor KMY's contact connection, star starting contactor KMY constitutes star connection with three phase motor's winding. The utility model discloses the circuit is simple.
Description
Technical field
The utility model relates to a kind of circuit, particularly a kind of star-triangle start circuit.
Background technology
Be the squirrel-cage asynchronous motor of delta connection for the normal stator winding run, if stator winding being connected into star when starting, being connected into triangle again after waiting to start, just can reducing starting current, alleviate its impact to electrical network.Such start mode is called star triangle decompression starting, or referred to as star delta control.When adopting star delta control, starting current is just original in 1/3 during delta connection across-the-line starting.When star delta control, starting current just 2-2.3 times.When adopting star delta control in other words, starting torque is also reduced to original in 1/3 during delta connection across-the-line starting.Be applicable to the occasion of no-load or light start.And compare with other reduced-voltage starter any, its structure is the simplest, and price is also the most cheap.In addition, star delta control mode also has an advantage, namely when load is lighter, motor can be allowed to run under star connection.Now, nominal torque can be mated with load, the efficiency of motor can be made like this to increase, and therefore saved power consumption.
Utility model content
For the defect of prior art, the utility model provides a kind of star-triangle start circuit.
A kind of star-triangle start circuit, three-phase power line L1, L2, L3 is connected with the main contacts of main contactor KM with fusing FU1 through main switch QS, main contacts one tunnel of main contactor KM is connected with thermal relay KTH, the winding switching of thermal relay KTH and threephase motor, another road of the main contacts of main contactor KM is connected with the main contacts of triangle starting contactor KM △, triangle starting contactor KM △ forms triangle with the winding of threephase motor and is connected, the winding of threephase motor is also connected with the contact of star starting contactor KMY, the winding of star starting contactor KMY and threephase motor forms Y-connection, power line L1 is connected with stop button SB2 through fusing FU2, be connected with the coil of main contactor KM after stop button SB2 connects with start button SB1, normally opened contact and the start button SB1 of main contactor KM are connected in parallel, the normally-closed contact of contactor KM △ is connected with the coil of contactor KMY after connecting with the normally-closed contact of time relay KT, with the coils from parallel connection of coils of described time relay KT after the normally-closed contact of time relay KT and the coils connected in series of contactor KMY, the normally-closed contact of described contactor KMY and the normally opened contact of time relay KT are connected with the coil of contactor KM △ after connecting, the normally opened contact of contactor KM △ and the normally opened contact of described time relay KT are in parallel, the coil of main contactor KM, the coil of contactor KMY, the coil of time relay KT, all be connected with power line L2 by the normally-closed contact of thermal relay KTH with the coil of contactor KM △.
The beneficial effects of the utility model are: circuit is simple, has saved power consumption.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of the utility model star-triangle start.
Embodiment
For enabling above-mentioned purpose of the present utility model, feature and advantage become apparent more, are described in detail embodiment of the present utility model below in conjunction with accompanying drawing, make above-mentioned and other object of the present utility model, Characteristics and advantages will be more clear.Reference numeral identical in whole accompanying drawing indicates identical part.Deliberately do not draw accompanying drawing in proportion, focus on purport of the present utility model is shown.
As shown in Figure 1, star of the present utility model-triangle start circuit, three-phase power line L1, L2, L3 is connected with the main contacts of main contactor KM with fusing FU1 through main switch QS, main contacts one tunnel of main contactor KM is connected with thermal relay KTH, the winding switching of thermal relay KTH and threephase motor, another road of the main contacts of main contactor KM is connected with the main contacts of triangle starting contactor KM △, triangle starting contactor KM △ forms triangle with the winding of threephase motor and is connected, the winding of threephase motor is also connected with the contact of star starting contactor KMY, the winding of star starting contactor KMY and threephase motor forms Y-connection, power line L1 is connected with stop button SB2 through fusing FU2, be connected with the coil of main contactor KM after stop button SB2 connects with start button SB1, normally opened contact and the start button SB1 of main contactor KM are connected in parallel, the normally-closed contact of contactor KM △ is connected with the coil of contactor KMY after connecting with the normally-closed contact of time relay KT, with the coils from parallel connection of coils of described time relay KT after the normally-closed contact of time relay KT and the coils connected in series of contactor KMY, the normally-closed contact of described contactor KMY and the normally opened contact of time relay KT are connected with the coil of contactor KM △ after connecting, the normally opened contact of contactor KM △ and the normally opened contact of described time relay KT are in parallel, the coil of main contactor KM, the coil of contactor KMY, the coil of time relay KT, all be connected with power line L2 by the normally-closed contact of thermal relay KTH with the coil of contactor KM △.
Operation principle: during startup, first closed main switch QS, press start button SB1, the now main contacts adhesive of main contactor KM, normally-closed contact adhesive, normally opened contact is opened, main contactor KM self-locking, now the normally opened contact of contactor KM △ is in closure state, the normally-closed contact of time relay KT is in closure state, the coil of contactor KMY obtains electric, the main contacts adhesive of contactor KMY, normally-closed contact is opened, motor star starts, time relay KT starts timing, after timing time arrives, the normally-closed contact of the time relay is opened, normally opened contact adhesive, the coil losing electricity of contactor KMY, the normally opened contact of contactor KMY is opened, normally-closed contact adhesive, the coil of contactor KM △ obtains electric, the normally opened contact adhesive of contactor KM △, contactor KM △ self-locking, the main contacts adhesive motor triangle of contactor KM △ runs.When there is overcurrent, thermal relay action, its normally-closed contact is opened, and cuts off the connection of each coil and power line L2, makes each main contacts open motor out of service.
Set forth a lot of detail in the above description so that fully understand the utility model.But above description is only preferred embodiment of the present utility model, the utility model can be much different from alternate manner described here to implement, and therefore the utility model is not by the disclosed concrete restriction implemented above.Any those skilled in the art are not departing under technical solutions of the utility model ambit simultaneously, the Method and Technology content of above-mentioned announcement all can be utilized to make many possible variations and modification to technical solutions of the utility model, or be revised as the Equivalent embodiments of equivalent variations.Every content not departing from technical solutions of the utility model, according to technical spirit of the present utility model to any simple modification made for any of the above embodiments, equivalent variations and modification, all still belongs in the scope of technical solutions of the utility model protection.
Claims (1)
1. star-triangle start circuit, it is characterized in that three-phase power line L1, L2, L3 is connected with the main contacts of main contactor KM with fusing FU1 through main switch QS, main contacts one tunnel of main contactor KM is connected with thermal relay KTH, the winding switching of thermal relay KTH and threephase motor, another road of the main contacts of main contactor KM is connected with the main contacts of triangle starting contactor KM △, triangle starting contactor KM △ forms triangle with the winding of threephase motor and is connected, the winding of threephase motor is also connected with the contact of star starting contactor KMY, the winding of star starting contactor KMY and threephase motor forms Y-connection, power line L1 is connected with stop button SB2 through fusing FU2, be connected with the coil of main contactor KM after stop button SB2 connects with start button SB1, normally opened contact and the start button SB1 of main contactor KM are connected in parallel, the normally-closed contact of contactor KM △ is connected with the coil of contactor KMY after connecting with the normally-closed contact of time relay KT, with the coils from parallel connection of coils of described time relay KT after the normally-closed contact of time relay KT and the coils connected in series of contactor KMY, the normally-closed contact of described contactor KMY and the normally opened contact of time relay KT are connected with the coil of contactor KM △ after connecting, the normally opened contact of contactor KM △ and the normally opened contact of described time relay KT are in parallel, the coil of main contactor KM, the coil of contactor KMY, the coil of time relay KT, all be connected with power line L2 by the normally-closed contact of thermal relay KTH with the coil of contactor KM △.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520842130.XU CN205142057U (en) | 2015-10-28 | 2015-10-28 | Star - triangle starting circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520842130.XU CN205142057U (en) | 2015-10-28 | 2015-10-28 | Star - triangle starting circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205142057U true CN205142057U (en) | 2016-04-06 |
Family
ID=55627809
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520842130.XU Expired - Fee Related CN205142057U (en) | 2015-10-28 | 2015-10-28 | Star - triangle starting circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205142057U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106655920A (en) * | 2017-01-24 | 2017-05-10 | 郭自刚 | Starting structure set and method of asynchronous starting permanent-magnet synchronous motor |
| CN114872874A (en) * | 2022-05-17 | 2022-08-09 | 江南造船(集团)有限责任公司 | Starting method of ship closed circulation system and seawater cooling system |
-
2015
- 2015-10-28 CN CN201520842130.XU patent/CN205142057U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106655920A (en) * | 2017-01-24 | 2017-05-10 | 郭自刚 | Starting structure set and method of asynchronous starting permanent-magnet synchronous motor |
| CN114872874A (en) * | 2022-05-17 | 2022-08-09 | 江南造船(集团)有限责任公司 | Starting method of ship closed circulation system and seawater cooling system |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160406 Termination date: 20161028 |