CN201541221U - Electric control circuit - Google Patents
Electric control circuit Download PDFInfo
- Publication number
- CN201541221U CN201541221U CN2009202584539U CN200920258453U CN201541221U CN 201541221 U CN201541221 U CN 201541221U CN 2009202584539 U CN2009202584539 U CN 2009202584539U CN 200920258453 U CN200920258453 U CN 200920258453U CN 201541221 U CN201541221 U CN 201541221U
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- CN
- China
- Prior art keywords
- secondary circuit
- contact
- load switch
- switch
- circuit
- 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 an electric control circuit, which includes a load switch, a main circuit, and a secondary circuit. One end of the contact of the load switch is connected with a power source, while the other end of the contact is connected with the main circuit, and a switch device in parallel connection with the load switch is included. One end of the contact of the switch device is connected with the power source, while the other end of the contact is connected with the secondary circuit. The utility model controls on/off of the secondary circuit by adding a knife-blade switch in parallel connection with the load switch. When the secondary circuit of the electric apparatus fails, the main circuit can be cut by cutting off the load switch, the failure of the secondary circuit can be found out under the condition that the secondary circuit is turned on. The utility model is convenient, easy for implementation, and safe.
Description
Technical field
The utility model relates to a kind of circuit, relates in particular to a kind of electric control circuit.
Background technology
At present, the general shared QS on-load switch of the major loop of present electric equipment and secondary circuit, motor positive and inverse electric control circuit as shown in Figure 1.If but secondary circuit breaks down, search problem more hidden and can not bringing onto load when searching problem, but must make secondary circuit charged; Search problem as the working voltage method, must disconnect load, the disconnecting consumers line, relatively more bothersome and dangerous.
The utility model content
The purpose of this utility model provides a kind of electric control circuit that can disconnect major loop and secondary circuit respectively.
The utility model adopts following technical proposals: a kind of electric control circuit, comprise on-load switch, major loop and secondary circuit, contact one end of on-load switch is connected with power supply, the contact other end is connected with major loop, it is characterized in that: also comprise a switching device in parallel with on-load switch, contact one end of described switching device is connected with power supply, and the other end of contact is connected with secondary circuit.
Described switching device is a knife switch.
A kind of electric control circuit of the utility model is controlled the break-make of secondary circuit by increasing a knife switch with the on-load switch parallel connection, when the electric equipment secondary circuit breaks down, can disconnect major loop easily by disconnecting on-load switch, make the fault of finding out secondary circuit under the charged situation of secondary circuit.The utility model is convenient easily to be implemented, and safety.
Description of drawings
Fig. 1 is electrical control figure of the prior art;
Fig. 2 is electrical control figure of the present utility model.
Embodiment
As shown in Figure 2, a kind of electric control circuit of the utility model comprises on-load switch QS, knife switch HK, major loop and secondary circuit, contact one end of on-load switch QS is connected with three phase mains L1, L2, L3, the contact other end is connected with major loop, knife switch HK is in parallel with on-load switch QS, contact one end of knife switch HK is connected with wherein two-phase L1, L2 in the three phase mains, and the other end of contact is connected with secondary circuit.
Operation principle of the present utility model: in this control circuit, knife switch HK is used for controlling secondary circuit, and on-load switch QS only controls major loop.When this control circuit operate as normal, on-load switch QS and knife switch HK simultaneously close; When the secondary circuit in this control circuit breaks down, then disconnect on-load switch QS, just can disconnect main control loop easily, because knife switch HK is closed, then secondary circuit is charged, then can find out the fault of secondary circuit easily.
In addition, the utility model also is suitable for obsolete control appliance of normal phase and out of order control circuit.
Claims (2)
1. electric control circuit, comprise on-load switch, major loop and secondary circuit, contact one end of on-load switch is connected with power supply, the contact other end is connected with major loop, it is characterized in that: also comprise a switching device in parallel with on-load switch, contact one end of described switching device is connected with power supply, and the other end of contact is connected with secondary circuit.
2. a kind of electric control circuit according to claim 1 is characterized in that: described switching device is a knife switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202584539U CN201541221U (en) | 2009-11-14 | 2009-11-14 | Electric control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202584539U CN201541221U (en) | 2009-11-14 | 2009-11-14 | Electric control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201541221U true CN201541221U (en) | 2010-08-04 |
Family
ID=42592672
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202584539U Expired - Fee Related CN201541221U (en) | 2009-11-14 | 2009-11-14 | Electric control circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201541221U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103001479A (en) * | 2012-10-30 | 2013-03-27 | 广东易事特电源股份有限公司 | Large-power phase-controlled rectifier start-and-stop circuit |
| CN104378014A (en) * | 2014-12-02 | 2015-02-25 | 国家电网公司 | Forward-backward rotation controller for three-phase asynchronous motor |
-
2009
- 2009-11-14 CN CN2009202584539U patent/CN201541221U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103001479A (en) * | 2012-10-30 | 2013-03-27 | 广东易事特电源股份有限公司 | Large-power phase-controlled rectifier start-and-stop circuit |
| CN103001479B (en) * | 2012-10-30 | 2014-11-05 | 广东易事特电源股份有限公司 | Large-power phase-controlled rectifier start-and-stop circuit |
| CN104378014A (en) * | 2014-12-02 | 2015-02-25 | 国家电网公司 | Forward-backward rotation controller for three-phase asynchronous motor |
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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: 20100804 Termination date: 20111114 |