CN203352507U - Control and protection switch - Google Patents
Control and protection switch Download PDFInfo
- Publication number
- CN203352507U CN203352507U CN 201320268679 CN201320268679U CN203352507U CN 203352507 U CN203352507 U CN 203352507U CN 201320268679 CN201320268679 CN 201320268679 CN 201320268679 U CN201320268679 U CN 201320268679U CN 203352507 U CN203352507 U CN 203352507U
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- CN
- China
- Prior art keywords
- contactor
- main contactor
- normally opened
- opened contact
- relay
- 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 discloses a control and protection switch. The control and protection switch comprises a main contactor KM1, a contactor KM2, a contactor KM3, a time relay KT, an intermediate relay KA, an air switch QF is turned on and a three-phase power supply is switched on, a start button SB2 is pressed and the main contactor KM1 is energized, normally open contacts KM1K1, KM1K2, KM1K4 of the main contactor KM1 are switched on, an autotransformer coil QSA is switched on and connected to be a star shape, at the same time, the contactor KM2 is energized and actuated, and a normally open contact KM2K of the contactor KM2 is switched on, and thus a low voltage tap of the autotransformer QSA connects 65% of a three-phase voltage to an electromotor, and the electromotor realizes a low-voltage start. The utility model provides a control and protection switch for voltage reduction in starting of the electromotor, reduces a current in starting of the electromotor, reduces impact to a power supply in starting of the electromotor, and prolongs service life of the electromotor.
Description
Technical field
The utility model relates to the control and protective switch field, is specifically related to a kind of control and protective switch.
Background technology
Expend electric current during electric motor starting very large, power supply is impacted, use electric current when reducing electric motor starting, avoid the impact that power supply is caused, study the new problem that a kind of control and protective switch that reduces motor start-up voltage has become research.
The utility model content
The purpose of this utility model just is to provide a kind of electric current can reduce electric motor starting the time, reduces a kind of control and protective switch of electric motor starting to the impact of power supply.
A kind of control and protective switch comprises main contactor KM1, contactor KM2, contactor KM3, time relay KT, auxiliary relay KA, described auxiliary relay KA and time relay KT, main contactor KM1, contactor KM3 connects, time relay KT is connected with main contactor KM1, main contactor KM1 is connected with auxiliary relay normally-closed contact KAK3, time relay KT, contactor KM2 is connected with the normally opened contact KM1K2 of main contactor KM1, auxiliary relay KA is connected with the normally opened contact KTK of time relay KT, the normally-closed contact KM1K3 of contactor KM3 and main contactor KM1, the normally opened contact KAK2 of auxiliary relay KA connects.
The air switch QF that closes connects three phase mains, press start button SB2 main contactor KM1 energising, normally opened contact KM1K1, the KM1K2 of main contactor KM1, KM1K4 closure, autotransformer coil QSA connects and is connected into star, the adhesive of contactor KM2 energising simultaneously, the normally opened contact KM2K closure of contactor KM2, make the low pressure tap of autotransformer QSA by 65% access motor of three-phase voltage, and motor is realized low voltage starting.
The normally opened contact KM1K2 closure of main contactor KM1, the time relay KT adhesive of switching on, start timing by the time set, after the time arrives, the time delay normally opened contact KTK closure of time relay KT, auxiliary relay KA energising adhesive self-locking, the normally-closed contact KAK3 of auxiliary relay KA disconnects and makes main contactor KM1 outage, normally opened contact KM1K1, the KM1K2 of main contactor KM1, KM1K4 all disconnect, and autotransformer QSA envelope star end is opened; Contactor KM2 outage simultaneously, its normally opened contact KM2K disconnects, and cuts off autotransformer QSA power supply; The normally opened contact KAK2 of auxiliary relay KA due to auxiliary relay KA electric and closed, the normally-closed contact KM1K3 closure resetted by main contactor KM1 outage, motor moves under total head.
The normally opened contact KM1K2 of main contactor KM1 disconnects time relay KT is disconnected, and its time delay normally opened contact KTK becomes disconnection by closure, and after having guaranteed that the motor start-up task completes, time relay KT is in off-position.
The utility model provides a kind of control and protective switch of motor start-up step-down, has reduced the electric current of motor start-up, while having reduced motor start-up, to the impact of power supply, has extended the useful life of motor.
The accompanying drawing explanation
Accompanying drawing 1 is operation principle schematic diagram of the present utility model.
Embodiment
A kind of control and protective switch comprises main contactor KM1, contactor KM2, contactor KM3, time relay KT, auxiliary relay KA, described auxiliary relay KA and time relay KT, main contactor KM1, contactor KM3 connects, time relay KT is connected with main contactor KM1, main contactor KM1 is connected with auxiliary relay normally-closed contact KAK3, time relay KT, contactor KM2 is connected with the normally opened contact KM1K2 of main contactor KM1, auxiliary relay KA is connected with the normally opened contact KTK of time relay KT, the normally-closed contact KM1K3 of contactor KM3 and main contactor KM1, the normally opened contact KAK2 of auxiliary relay KA connects.
The air switch QF that closes connects three phase mains, press start button SB2 main contactor KM1 energising, normally opened contact KM1K1, the KM1K2 of main contactor KM1, KM1K4 closure, autotransformer coil QSA connects and is connected into star, the adhesive of contactor KM2 energising simultaneously, the normally opened contact KM2K closure of contactor KM2, make the low pressure tap of autotransformer QSA by 65% access motor of three-phase voltage, and motor is realized low voltage starting.
The normally opened contact KM1K2 closure of main contactor KM1, the time relay KT adhesive of switching on, start timing by the time set, after the time arrives, the time delay normally opened contact KTK closure of time relay KT, auxiliary relay KA energising adhesive self-locking, the normally-closed contact KAK 3 of auxiliary relay KA disconnects and makes main contactor KM1 outage, normally opened contact KM1K1, the KM1K2 of main contactor KM1, KM1K4 all disconnect, and autotransformer QSA envelope star end is opened; Contactor KM2 outage simultaneously, its normally opened contact KM2K disconnects, and cuts off autotransformer QSA power supply; The normally opened contact KAK2 of auxiliary relay KA due to auxiliary relay KA electric and closed, the normally-closed contact KM1K3 closure resetted by main contactor KM1 outage, motor moves under total head.
The normally opened contact KM1K2 of main contactor KM1 disconnects time relay KT is disconnected, and its time delay normally opened contact KTK becomes disconnection by closure, and after having guaranteed that the motor start-up task completes, time relay KT is in off-position.
The utility model provides a kind of control and protective switch of motor start-up step-down, has reduced the electric current of motor start-up, while having reduced motor start-up, to the impact of power supply, has extended the useful life of motor.
Claims (3)
1. a control and protective switch comprises main contactor KM1, contactor KM2, contactor KM3, time relay KT, auxiliary relay KA, it is characterized in that: described auxiliary relay KA and time relay KT, main contactor KM1, contactor KM3 connects, time relay KT is connected with main contactor KM1, main contactor KM1 is connected with auxiliary relay normally-closed contact KAK3, time relay KT, contactor KM2 is connected with the normally opened contact KM1K2 of main contactor KM1, auxiliary relay KA is connected with the normally opened contact KTK of time relay KT, the normally-closed contact KM1K3 of contactor KM3 and main contactor KM1, the normally opened contact KAK2 of auxiliary relay KA connects.
2. a kind of control and protective switch according to claim 1; it is characterized in that: the air switch QF that closes connects three phase mains; press start button SB2 main contactor KM1 energising; normally opened contact KM1K1, the KM1K2 of main contactor KM1, KM1K4 closure; autotransformer coil QSA connects and is connected into star; the adhesive of contactor KM2 energising simultaneously; the normally opened contact KM2K closure of contactor KM2; make the low pressure tap of autotransformer QSA by 65% access motor of three-phase voltage, motor is realized low voltage starting.
3. a kind of control and protective switch according to claim 1, it is characterized in that: the normally opened contact KM1K2 closure of main contactor KM1, the time relay KT adhesive of switching on, start timing by the time set, after the time arrives, the time delay normally opened contact KTK closure of time relay KT, auxiliary relay KA energising adhesive self-locking, the normally-closed contact KAK3 of auxiliary relay KA disconnects and makes main contactor KM1 outage, normally opened contact KM1K1, the KM1K2 of main contactor KM1, KM1K4 all disconnect, and autotransformer QSA envelope star end is opened; Contactor KM2 outage simultaneously, its normally opened contact KM2K disconnects, and cuts off autotransformer QSA power supply; The normally opened contact KAK2 of auxiliary relay KA due to auxiliary relay KA electric and closed, the normally-closed contact KM1K3 closure resetted by main contactor KM1 outage, motor moves under total head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320268679 CN203352507U (en) | 2013-05-16 | 2013-05-16 | Control and protection switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320268679 CN203352507U (en) | 2013-05-16 | 2013-05-16 | Control and protection switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203352507U true CN203352507U (en) | 2013-12-18 |
Family
ID=49752354
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320268679 Expired - Fee Related CN203352507U (en) | 2013-05-16 | 2013-05-16 | Control and protection switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203352507U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104917423A (en) * | 2015-07-01 | 2015-09-16 | 山东鲁亿通智能电气股份有限公司 | Reduced-voltage starting control system |
| CN110635731A (en) * | 2019-09-30 | 2019-12-31 | 徐州柏兴电子有限公司 | Start-up repair method for transformer |
-
2013
- 2013-05-16 CN CN 201320268679 patent/CN203352507U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104917423A (en) * | 2015-07-01 | 2015-09-16 | 山东鲁亿通智能电气股份有限公司 | Reduced-voltage starting control system |
| CN104917423B (en) * | 2015-07-01 | 2019-03-05 | 山东鲁亿通智能电气股份有限公司 | A kind of reduced-voltage starting control system |
| CN110635731A (en) * | 2019-09-30 | 2019-12-31 | 徐州柏兴电子有限公司 | Start-up repair method for transformer |
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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: 20131218 Termination date: 20140516 |