CN201533153U - Control circuit for preventing frequent make-and-break of alternating current contactor - Google Patents
Control circuit for preventing frequent make-and-break of alternating current contactor Download PDFInfo
- Publication number
- CN201533153U CN201533153U CN2009201652204U CN200920165220U CN201533153U CN 201533153 U CN201533153 U CN 201533153U CN 2009201652204 U CN2009201652204 U CN 2009201652204U CN 200920165220 U CN200920165220 U CN 200920165220U CN 201533153 U CN201533153 U CN 201533153U
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- protector
- contactor
- control
- switch
- break
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Abstract
The control circuit uses the make-and-break of a protector working power supply (BV) and a protector output relay with time-delay movements according to 'New Method of Preventing Frequent Make-and-break of Alternating Current Contactor'. A pressure switch or a stroke switch controls the protector working power supply, the protector output relay controls an alternating contactor coil, when a pressure switch or a stroke switch contact is not well contacted, the alternating contactor cannot be carried out frequent make-and-break, and the major difficulty existing in the prior art is solved. The control circuit relates to the field of magnetic force starters, in particular to the control of magnetic force starters or alternating current contactors by electro-motors and the control and protection of alternating current contactors such as protection devices, and the control circuit can be widely applied in electric control of air compressors and pumps and other machines.
Description
Technical field:
The utility model relates to low-voltage electrical apparatus field, particularly motor or other load is made up with protective device with magnetic starter or A.C. contactor control.
Technical background:
A.C. contactor was mostly with button or toggle switch control in the past, but normal working pressure switch or travel switch etc. in automatic control system, tend to run into that contact contact is bad causes the frequent break-make of A.C. contactor and loose contact or cause ac contactor contact fusing, adhesion and damage, cause faults such as phase shortage, three-phase imbalance, overload, equipment can not be run well, heavy then motor or miscellaneous equipment are burnt.The similar devices that is in operation at present has millions of approximately, nearly all is in the state operation down that does not have precautionary measures, and year spoilage is up to more than 80%, and will cause the economic loss of several hundred million units every year.
Summary of the invention:
The purpose of this utility model is that the output relay control A.C. contactor of motor protector has solved the key issue of former existence at a kind of working power of utilizing pressure switch or travel switch control motor protector of above-mentioned defective invention.
The technical solution of the utility model: the control circuit of the frequent break-make of a kind of preventing AC contactor is by A.C. contactor (KM); motor (M) or other load; motor protector (MB); control switch (SA1) or pressure switch or travel switch normally-closed contact (SA2) are formed; it is characterized in that three phase mains (U); (V) and (W) run through motor protector (MB) after process A.C. contactor (KM) control; connect motor (M) or other load then; (U) connects ac contactor coil (KM) and protector power supply terminal (A2) in the three phase mains; connect protector relay normally open contact (KA) lead-out terminal (95) and pressure switch or travel switch normally-closed contact (SA2) simultaneously behind (W) the process control switch (SA1) in the three phase mains; through connecting protector power supply terminal (A1) again after pressure switch or travel switch normally-closed contact (SA2) control; protector relay normally open contact (KA) lead-out terminal (96) connects ac contactor coil (KM); formation control switch (SA1) is connected with protector relay normally open contact (KA) and is controlled A.C. contactor (KM), and control switch (SA1) is connected with pressure switch or travel switch normally-closed contact (SA2) and controlled protector working power (BV).
Description of drawings:
The control circuit schematic diagram of Fig. 1, the frequent break-make of a kind of preventing AC contactor.
U V W three phase mains, KM ac contactor contact or ac contactor coil, M motor, MB motor protector, KA protector relay normally open contact, 95 lead-out terminals, 96 lead-out terminals, A1A2 protector power supply terminal, SA1 control switch, SA2 pressure or travel switch normally-closed contact, BV protector working power among the figure.
Implementation method:
Fig. 1 is the control circuit schematic diagram of the frequent break-make of a kind of preventing AC contactor, and mode of connection is three phase mains (U), (V) and (W) through running through motor protector (MB) after A.C. contactor (KM) control, connects motor (M) then.(U) connects ac contactor coil (KM) and protector power supply terminal (A2) in the three phase mains; connect protector relay normally open contact (KA) lead-out terminal (95) and pressure switch or travel switch normally-closed contact (SA2) simultaneously behind (W) the process control switch (SA1) in the three phase mains; through connecting protector power supply terminal (A1) again after pressure switch or travel switch normally-closed contact (SA2) control; protector relay normally open contact (KA) lead-out terminal (96) connects ac contactor coil (KM); formation control switch (SA1) is connected with protector relay normally open contact (KA) and is controlled A.C. contactor (KM), and control switch (SA1) is connected with pressure switch or travel switch normally-closed contact (SA2) and controlled the power supply of protector working power (BV).Operation principle is to open control switch (SA1); the control power supply is powered to motor protector (MB) through pressure switch or travel switch normally-closed contact (SA2); protector relay normally open contact (KA) is connected, A.C. contactor (KM) adhesive, motor (M) running.If pressure switch or travel switch normally-closed contact (SA2) contact when bad; protector working power (BV) has of short duration delay function with protector relay normally open contact (KA); so protector relay normally open contact (KA) can not disconnect, avoided the phenomenon of the frequent break-make of A.C. contactor (KM) contact.
Claims (1)
1. the control circuit of the frequent break-make of preventing AC contactor is by A.C. contactor (KM); motor (M) or other load; motor protector (MB); control switch (SA1) and pressure switch or travel switch normally-closed contact (SA2) are formed; it is characterized in that three phase mains (U); (V) and (W) run through motor protector (MB) after process A.C. contactor (KM) control; connect motor (M) or other load then; (U) connects ac contactor coil (KM) and protector power supply terminal (A2) in the three phase mains; connect protector relay normally open contact (KA) lead-out terminal (95) and pressure switch or travel switch normally-closed contact (SA2) simultaneously behind (W) the process control switch (SA1) in the three phase mains; through connecting protector power supply terminal (A1) again after pressure switch or travel switch normally-closed contact (SA2) control; protector relay normally open contact (KA) lead-out terminal (96) connects ac contactor coil (KM); formation control switch (SA1) is connected with protector relay normally open contact (KA) and is controlled A.C. contactor (KM), and control switch (SA1) is connected with pressure switch or travel switch normally-closed contact (SA2) and controlled protector working power (BV).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201652204U CN201533153U (en) | 2009-06-24 | 2009-06-24 | Control circuit for preventing frequent make-and-break of alternating current contactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201652204U CN201533153U (en) | 2009-06-24 | 2009-06-24 | Control circuit for preventing frequent make-and-break of alternating current contactor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201533153U true CN201533153U (en) | 2010-07-21 |
Family
ID=42528553
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201652204U Expired - Fee Related CN201533153U (en) | 2009-06-24 | 2009-06-24 | Control circuit for preventing frequent make-and-break of alternating current contactor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201533153U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102611265A (en) * | 2011-12-09 | 2012-07-25 | 江南嘉捷电梯股份有限公司 | Bridging device applied to synchronous motor |
-
2009
- 2009-06-24 CN CN2009201652204U patent/CN201533153U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102611265A (en) * | 2011-12-09 | 2012-07-25 | 江南嘉捷电梯股份有限公司 | Bridging device applied to synchronous motor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP02 | Change in the address of a patent holder |
Address after: 325200 Ruian City, south of the Yangtze River in the city of riverside Street standard factory building light industrial zone, the first floor of the ninth floor of the first floor of the Thai Electrical Appliance Co., Ltd., four Patentee after: Cai Fuhan Address before: 325207 Zhejiang province Ruian City Feiyun Town Yun Zhou Industrial Zone Thai Electric Appliance Co. Ltd Patentee before: Cai Fuhan |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100721 Termination date: 20140624 |
|
| EXPY | Termination of patent right or utility model |