CN2456305Y - Phaseoff protected contactor - Google Patents
Phaseoff protected contactor Download PDFInfo
- Publication number
- CN2456305Y CN2456305Y CN 00262272 CN00262272U CN2456305Y CN 2456305 Y CN2456305 Y CN 2456305Y CN 00262272 CN00262272 CN 00262272 CN 00262272 U CN00262272 U CN 00262272U CN 2456305 Y CN2456305 Y CN 2456305Y
- Authority
- CN
- China
- Prior art keywords
- contactor
- control system
- coil
- series
- 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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- Emergency Protection Circuit Devices (AREA)
Abstract
The utility model relates to a contactor with phase interruption automatic protection function. The utility model is characterized in that a control system is added in the existing insulating casing; a primary coil of a sensor of the control system is connected in series between a static contact and a wire connection screw; a secondary coil is connected with an electronic element of the control system; the contactor is provided with a main and a secondary coils; the main coil is connected in series with a normally closed contact of a relay of the control system; the secondary coil supplies the operating current to the control system. When power supply is switched on and the contactor is closed to work, a three-phase circuit generates phase failure, the sensor connected in series in the circuit triggers the signal to a control mechanism, the control mechanism sends the instruction to an actuator, the relay operates to cut off the main coil current of the contactor, the contactor is separated, and the power supply is cut off.
Description
The utility model relates to the contactor of a kind of threephase motor phase failure energy automatic disconnection.
At present, known contactor, only certain cuts off the power supply mutually and could disconnect in inserting the contactor coil circuit, can not automatic disconnection and neutralize other once outage mutually at the circuit that contactor output inserts load, therefore, make motor continue energising, cause the motor circuit inter-burnout-ing.
The purpose of this utility model provides the contactor that a kind of certificate has phase failure protection function; it reaches the purpose that the open phase protection motor burns regardless of being that the phase failure can both make the contactor automatic disconnection cut off motor power in the input of contactor or the outlet line that inserts load.
The purpose of this utility model is achieved in that in insulation crust, and a control system is set, and this control system has three transducers, and its primary coil one end links to each other with three fixed contacts on one side respectively, and the other end links to each other with three terminal screws respectively.Secondary coil is connected with three groups of electronic components on the control board respectively, and relay normally closed interlock one end of control system is connected with the contactor main coil, and the other end is electrically connected with terminal screw.The operating current of control system is provided by the contactor coil secondary coil.When pressing starting switch, electric current is added on the contactor main coil by the relay normally closed interlock, and moving adhesive unshakable in one's determination drives the operation of contact closure electric motor starting, and the contactor secondary coil induces the work of electric current supply control system simultaneously.Under normal circumstances three transducer secondary coil induced currents equate that relay is failure to actuate.As once the phase failure just is provided with induced current in a transducer secondary coil, cause control system work, relay adhesive normally closed interlock disconnects, and contactor main coil outage contact separately reaches the purpose of motor open phase protection.
Owing to adopted such scheme, contactor not only can be connected electric motor starting and disconnection, and has increased phase failure protection function easily.
Below in conjunction with drawings and Examples the utility model is further specified.
Fig. 1 is a circuit frame principle figure of the present utility model.
Fig. 2 is the cutaway view of contactor embodiment.
Among the figure 1, arc-extinguish chamber 2, compression spring sheet 3, moving contact 4, fixed contact 5, terminal screw 6, transducer 7, change over switch 8, control board 9, relay 10, insulation crust 11, contactor coil 12, short-circuited conducting sleeve 13, fixed core 14, buffer spring 15, moving unshakable in one's determination 16, auxiliary normally open contact 17, auxiliary normally closed interlock
In Fig. 1, fixed contact (4) the primary coil other end that links to each other with transducer (6) primary coil one end links to each other with terminal screw (5), the secondary coil of transducer (6) is connected with control board (8), and the relay on the control board (9) normally closed interlock is connected with the main coil of contactor coil (11).
In embodiment illustrated in fig. 2, a control board (8) is set in the insulation crust (10), its operating current is by obtaining in contactor coil (11) secondary coil.Contactor has three fixed contacts in one side (4) and terminal screw (5) to disconnect, and the centre is connected by the primary coil of three transducers (6) respectively.The main coil polyphone of the normally closed interlock of the relay on the control board (9) and contactor coil (11), when pressing starting switch, electric current is by the relay normally closed interlock, contactor main coil energising moving (15) unshakable in one's determination drives moving contact (3) and fixed contact (4) closure with fixed core (13) adhesive, and electric current is by transducer primary coil supply load.As once the phase failure causes control system action, the outage of contactor main coil is because the effect of spring separates moving contact (3) and fixed contact (4), the cut-out load power source.Change over switch (7) is manual and automatic phase failure function conversion switch.
Claims (2)
1, a kind of contactor, fixed contact is connected with power supply on one side, another side is connected with load, contactor coil is with push switch and be electrically connected, it is characterized in that: in the contactor insulation crust, set up a control system, the sensing mechanism of fixed contact by control system be electrically connected, the actuator of contactor coil by control system be electrically connected.
2, contactor according to claim 1 is characterized in that: it is what to separate with terminal screw that one side fixed contact is arranged, and contactor coil divides major and minor coil, is equipped with in the control system circuit automatically and manual change-over switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00262272 CN2456305Y (en) | 2000-11-10 | 2000-11-10 | Phaseoff protected contactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00262272 CN2456305Y (en) | 2000-11-10 | 2000-11-10 | Phaseoff protected contactor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2456305Y true CN2456305Y (en) | 2001-10-24 |
Family
ID=33617583
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00262272 Expired - Fee Related CN2456305Y (en) | 2000-11-10 | 2000-11-10 | Phaseoff protected contactor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2456305Y (en) |
-
2000
- 2000-11-10 CN CN 00262272 patent/CN2456305Y/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 | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |