CN201113400Y - Composite type contactor - Google Patents
Composite type contactor Download PDFInfo
- Publication number
- CN201113400Y CN201113400Y CNU2007200923642U CN200720092364U CN201113400Y CN 201113400 Y CN201113400 Y CN 201113400Y CN U2007200923642 U CNU2007200923642 U CN U2007200923642U CN 200720092364 U CN200720092364 U CN 200720092364U CN 201113400 Y CN201113400 Y CN 201113400Y
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- CN
- China
- Prior art keywords
- phase
- contactor
- coil
- circuit
- contact
- 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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- Motor And Converter Starters (AREA)
- Control Of Ac Motors In General (AREA)
Abstract
The utility model discloses a compound contactor, comprising an AC contactor housing, wherein, a secondary circuit is connected between an A circuit and a C circuit and is connected in series with a stoppage button, a starting button and a contactor coil in sequence from phase A to phase C, the inner part of the housing is also provided with a small-sized relay, a coil and a contact of the small-sized relay serve as a secondary coil and a normally open secondary contact of the contactor, the secondary coil is connected between the phase B and the phase C, the secondary contact is connected in series in the secondary circuit arranged between the phase A and the stoppage button. The compound contactor can avoid the damage of the motor caused by the lack-phase operation thoroughly.
Description
Technical field:
The utility model relates to electric elements, particularly a kind of in three-phase electrical power system any one timely deenergization when breaking down mutually, avoid causing the compound contactor that motor burns out because of phase shortage.
Background technology:
The contactor of installing in the present three-phase circuit, its structure as shown in Figure 1, it is to be provided with A, B, C three-phase main line in a housing 1, and is serially connected with stop button 2 successively in the secondary line between the circuit 4 mutually with C, start button 3 and contactor coil 5 at A.The disadvantage of this structure be can only A mutually or C phase circuit in time stop the work of motor M when breaking down; motor is played a protective role; but when B phase circuit breaks down; timely deenergization just; and make motor under the power supply state of three-phase imbalance, continue operation; cause burning out motor, cause unnecessary loss.
Summary of the invention:
The purpose of this utility model provides a kind of any phase line failure deenergization in time, avoids causing the compound contactor that motor burns out because of the 3rd phase shortage.
Technical solution of the present utility model is, it includes an A.C. contactor housing, between A, C circuit, be connected with secondary line, phase is in series with stop button successively from A to C on the secondary line, start button and contactor coil, it is characterized in that: a miniature relay also is installed in housing, the coil of miniature relay and contact are as the secondary coil and the Chang Kai auxiliary contact of contactor, secondary coil be connected B and C mutually between, auxiliary contact is connected on from A to the secondary line between the stop button.
The utlity model has the phenomenon of thoroughly stopping to cause the motor damage because of phase-deficient operation.
Description of drawings:
Fig. 1 is the electrical block diagram of prior art,
Fig. 2 is an electrical block diagram of the present utility model.
Embodiment:
The utility model is improvements over the prior art, as shown in Figure 2: it is that a miniature relay is installed in A.C. contactor housing 1, the coil of miniature relay is as the secondary coil 6 of contactor, auxiliary contact 7 is often opened as contactor in the contact of miniature relay, connected mode is that secondary coil is connected across between B phase and the C phase, simultaneously auxiliary contact is connected on from A to the secondary line between the stop button 4.Above-mentioned contactor coil 5 can be made any one of 220 or 380 volts, and secondary coil then needs to make 380 volts.Its operation principle is, when A phase or the short of electricity of C phase, can in time cut off the power supply of motor by main coil 5 and stop button 2, when B mutually or can in time cut off the secondary circuit power supply of stop button 2 and the main power source that cuts off motor M simultaneously during the short of electricity of C phase by secondary coil 6 and Chang Kai auxiliary contact 7.So no matter in the electric power system during any phase decompression outage, contactor can both in time cut off the power supply of motor M, thereby the phenomenon of thoroughly having stopped to damage because of the circuit phase-deficient operation motor takes place.
Claims (1)
1, compound contactor, it includes an A.C. contactor housing, between A, C circuit, be connected with secondary line, phase is in series with stop button successively from A to C on the secondary line, start button and contactor coil is characterized in that: a miniature relay also is installed in housing, and the coil of miniature relay and contact are as the secondary coil and the Chang Kai auxiliary contact of contactor, secondary coil be connected B and C mutually between, auxiliary contact is connected on from A to the secondary line between the stop button.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200923642U CN201113400Y (en) | 2007-10-17 | 2007-10-17 | Composite type contactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200923642U CN201113400Y (en) | 2007-10-17 | 2007-10-17 | Composite type contactor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201113400Y true CN201113400Y (en) | 2008-09-10 |
Family
ID=39965145
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200923642U Expired - Fee Related CN201113400Y (en) | 2007-10-17 | 2007-10-17 | Composite type contactor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201113400Y (en) |
-
2007
- 2007-10-17 CN CNU2007200923642U patent/CN201113400Y/en not_active Expired - Fee Related
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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: 20080910 Termination date: 20101017 |