CN207559557U - A kind of contactor with wide-voltage range applies circuit - Google Patents
A kind of contactor with wide-voltage range applies circuit Download PDFInfo
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- CN207559557U CN207559557U CN201721408882.0U CN201721408882U CN207559557U CN 207559557 U CN207559557 U CN 207559557U CN 201721408882 U CN201721408882 U CN 201721408882U CN 207559557 U CN207559557 U CN 207559557U
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Abstract
The utility model is related to contactor applied technical field, the utility model applies circuit for a kind of contactor with wide-voltage range, including three-phase ac contactor, the first current-limiting resistance and the second current-limiting resistance；The three-phase ac contactor includes main contacts, coil, normally closed auxiliary contact and normally opened auxiliary contact, the main contacts is connected on the A of AC three-phase circuit, B, in C three-phases, the first end of the normally closed auxiliary contact connects a wherein phase line for three-phase line by first current-limiting resistance, any one phase line of another two phase line of the first end connection three-phase line of coil, the first end of the normally opened contact is connect by second current-limiting resistance with N lines, the second end of the normally-closed contact, the second end of the normally opened contact, and the second end of the coil links together.The utility model makes contactor in wider voltage range, still ensure that the safe and reliable work of contactor using circuit, can also reduce contactor and keep power consumption, and design simply, cost is relatively low.
Description
Technical field
It should the utility model is related to contactor applied technical field more particularly to a kind of contactor with wide-voltage range
Use circuit.
Background technology
Contactor is widely used in electric power, distribution and electricity consumption occasion, operation principle：When contactor coil is powered
Afterwards, coil current can generate magnetic field, and the magnetic field of generation makes static iron core generate electromagnetic attraction attraction iron core, and contactor is driven to get an electric shock
Action, normally closed get an electric shock disconnect, and normally opened contact is closed, and the two is linkage.When the coil is de-energized, electromagnetic attraction disappears, and armature exists
It is discharged under the action of release spring, restores electric shock, normally opened contact disconnects, and normally closed get an electric shock is closed.A.C. contactor is touched using main
Point carrys out control circuit, and control loop is connected with auxiliary contact.Main contacts is usually normally opened contact, and auxiliary contact often have two pairs
Normally opened contact and normally-closed contact.
The control voltage of usual contactor is applied directly on coil, and operating voltage generally could normal work in more than 180V
Make, and maintenance voltage generally will be in below 250V.However, scope range of the fluctuation of voltage is larger in current distribution, some grid lines
The voltage of road terminal temperature difference is less than 130V, and contactor coil voltage is too low so that main contacts can not be normally attracted；Some circuits end
The voltage of end subscriber is higher than 270V, and the maintenance voltage of contactor coil is excessively high, coil can be caused to be burned out because electric current is excessive.Therefore
In these cases, the equal cisco unity malfunction of contactor.
Patent 200510029373.2 proposes a kind of " wide voltage energy-saving controller for contactor ", can be compared with Width funtion model
In enclosing, ensure contactor reliably working, but the design of its circuit is excessively complicated, and cost is higher, in practical distribution line
Inconvenience is implemented.
Invention content
For overcome the deficiencies in the prior art, the utility model provides a kind of contactor application with wide-voltage range
Circuit, the circuit in wider voltage range, can not only ensure the safe and reliable work of contactor, can also reduce contactor
Power consumption is kept, and is designed simply, cost is relatively low.
To achieve the above object, the utility model adopts the following technical solution：A kind of contactor with wide-voltage range
Using circuit, including three-phase ac contactor, the first current-limiting resistance and the second current-limiting resistance；The three-phase ac contactor includes
Main contacts K1, coil K1, normally closed auxiliary contact K1C and normally opened auxiliary contact K1O, the main contacts K1 are connected on AC three-phase line
In the A phase, B phase, C phase on road, the first end of the normally closed auxiliary contact K1C connects three-phase line by first current-limiting resistance
A wherein phase line, coil K1 first end connection three-phase line another two phase line any one phase line, it is described normally opened
The first end of contact K1O is connect by second current-limiting resistance with N lines, the second end of the normally-closed contact K1C, described normally opened
The second end of contact K1O and the second end of the coil K1 link together.
Preferably, D.C. contactor is further included, the D.C. contactor includes normally-closed contact K2, coil K2, coil K1's
First end is connect with the first end of the normally-closed contact K2, and the of the second end of normally-closed contact K2 and first current-limiting resistance
Two ends are connected respectively at arbitrary the two of AC three-phase circuit end of incoming cables.
Preferably, switch is further included, the first end of the coil K2 is extremely connected with the one of DC power supply, the coil K2's
Second end is extremely connected by the switch with the another of DC power supply.
Preferably, the first current-limiting resistance and the second current-limiting resistance be using metal wound wire resistance, and the second current-limiting resistance
Resistance value is more than the resistance value of the first current-limiting resistance.
Preferably, it switchs as controllable switch element.
Compared with prior art, the beneficial effects of the utility model are：
The coil of contactor, which starts operating voltage, becomes line voltage so that in relatively low circuit phase voltage, coil can be with
It being worked with line voltage start, the holding voltage of contactor is phase voltage, and current-limiting resistance can be such that holding voltage further reduces,
So that in higher line voltage distribution, safe and reliable work still can be kept, coil will not be burnt；Therefore contactor should
It is broadened with voltage range.
Current-limiting resistance can reduce holding electric current, so as to reduce the power consumption of contactor coil.
Only use two current-limiting resistances can be broadening by operating voltage range, design is simple, and cost is relatively low.
Description of the drawings
Fig. 1 is the circuit diagram that a kind of contactor with wide-voltage range of the utility model applies circuit.
Specific embodiment
In order to illustrate more clearly of the technical solution of the utility model, below in conjunction with attached drawing, the utility model is carried out
It specifically describes.However, the embodiments of the present invention are not limited thereto.
With reference to attached drawing 1, a kind of contactor with wide-voltage range applies circuit, including three-phase ac contactor, direct current
Contactor, controllable switch M1 and two current-limiting resistances R1, R2；The three-phase ac contactor include main contacts K1, coil K1, often
Close auxiliary contact K1C and normally opened auxiliary contact K1O；The D.C. contactor includes normally-closed contact K2, coil K2.
The main contacts K1 is connected in the A phase, B phase, C phase of AC three-phase circuit, and the first end of the coil K1 passes through
Normally-closed contact K2 is connected with the C of AC three-phase circuit end of incoming cables, and the first end of the normally closed auxiliary contact K1C passes through current limliting electricity
Resistance R1 is connected with the B of AC three-phase circuit end of incoming cables, and the first end of the normally opened contact K1O passes through current-limiting resistance R2 and N lines
Connection, the second end of the second end of the normally-closed contact K1C, the second end of the normally opened contact K1O and the coil K1 connect
It is connected together.The first end of the coil K2 is connected with the anode of DC power supply, and second end passes through controllable switch M1 and direct current
The cathode in source is connected.
Line voltage of the startup voltage of contactor coil K1 between B, C, when power grid phase voltage is 130V（Less than coil
Start voltage 180V）, at this time coil K1 B, C phase are connected to by normally closed auxiliary contact K1C, current-limiting resistance R1 and normally-closed contact K2
Between, the voltage born is line voltage, and value is 130*1.732=225V, and more than the startup voltage of coil, therefore coil K1 opens
Power grid phase voltage is 130V（Or less than 180V）When, still it can start, the range for starting voltage is broadening.
After coil K1 starts, main contacts K1, auxiliary normally-closed contact K1C, auxiliary normally opened contact K1O are acted, and K1 is closed
It closes, K1C is disconnected, and K1O is closed.Coil K1 is connected to C by normally opened auxiliary contact K1O, current-limiting resistance R2, normally-closed contact K2 at this time
Mutually between N phases, the maintenance voltage of coil K1 becomes phase voltage, if phase voltage is 270V（It is upper more than coil maintenance voltage
Limit 250V）, by the partial pressure of current-limiting resistance R2, the range that can cause the voltage drop of coil K1 that can be born as low as maintenance voltage
It is interior.Therefore, the range of maintenance voltage is also broadening.
If desired the connection of major loop is disconnected, then is closed controllable switch M1, obtains coil K2 electric, normally-closed contact K2 breaks at this time
It opens, coil K1 power down so that main contacts K1 is disconnected, and cuts off major loop.
It is designed using the circuit, the coil of contactor, which starts operating voltage, becomes line voltage so that in relatively low circuit phase
During voltage, coil can be worked with line voltage start, and the holding voltage of contactor is phase voltage, and current-limiting resistance can make holding
Voltage further reduces so that in higher line voltage distribution, still can keep safe and reliable work, will not burn line
Circle；Therefore the applied voltage range of contactor broadens.In addition, current-limiting resistance can also reduce holding electric current, so as to reduce
The power consumption of contactor coil.Only used two current-limiting resistances can be broadening by operating voltage range, design is simple, cost compared with
It is low.
Above-described embodiment is only the technical concept, principle and feature for illustrating the utility model, and its object is to allow be familiar with this
The people of item technology can understand the content of the utility model and implement according to this, and the protection model of the utility model can not be limited with this
It encloses.The equivalent transformation or modification that all Spirit Essences according to the utility model main technical schemes are done, should all cover in this reality
Within novel protection domain.
Claims (5)
1. a kind of contactor with wide-voltage range applies circuit, including three-phase ac contactor, the first current-limiting resistance and the
Two current-limiting resistances；The three-phase ac contactor includes main contacts K1, coil K1, normally closed auxiliary contact K1C and normally opened auxiliary and touches
Point K1O, it is characterised in that：The main contacts K1 is connected in the A phase, B phase, C phase of AC three-phase circuit, and the normally closed auxiliary is touched
The first end of point K1C connects a wherein phase line for three-phase line by first current-limiting resistance, and the first end of coil K1 connects
Any one phase line of another two phase line of three-phase line is connect, the first end of the normally opened contact K1O passes through second current limliting
Resistance is connect with N lines, the second end of the normally-closed contact K1C, the second end of the normally opened contact K1O and the coil K1
Second end link together.
2. a kind of a kind of contactor with wide-voltage range as described in claim 1 applies circuit, it is characterised in that：Also wrap
D.C. contactor is included, the D.C. contactor includes normally-closed contact K2, coil K2, the first end of coil K1 and the normally-closed contact
The second end of the first end connection of K2, the second end of normally-closed contact K2 and first current-limiting resistance is respectively at AC three-phase circuit
Arbitrary the two of end of incoming cables are connected.
3. a kind of a kind of contactor with wide-voltage range as claimed in claim 2 applies circuit, it is characterised in that：Also wrap
Switch is included, the first end of the coil K2 is extremely connected with the one of DC power supply, and the second end of the coil K2 passes through the switch
Another with DC power supply is extremely connected.
4. a kind of contactor as described in claim 1 with wide-voltage range applies circuit, it is characterised in that：Described first
Current-limiting resistance and the second current-limiting resistance are using metal wound wire resistance, and the resistance value of the second current-limiting resistance is more than the first current-limiting resistance
Resistance value.
5. a kind of contactor as claimed in claim 3 with wide-voltage range applies circuit, it is characterised in that：The switch
For controllable switch element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721408882.0U CN207559557U (en) | 2017-10-30 | 2017-10-30 | A kind of contactor with wide-voltage range applies circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721408882.0U CN207559557U (en) | 2017-10-30 | 2017-10-30 | A kind of contactor with wide-voltage range applies circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207559557U true CN207559557U (en) | 2018-06-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721408882.0U Active CN207559557U (en) | 2017-10-30 | 2017-10-30 | A kind of contactor with wide-voltage range applies circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107658874A (en) * | 2017-10-30 | 2018-02-02 | 广州开能电气实业有限公司 | A kind of contactor with wide-voltage range applies loop |
-
2017
- 2017-10-30 CN CN201721408882.0U patent/CN207559557U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107658874A (en) * | 2017-10-30 | 2018-02-02 | 广州开能电气实业有限公司 | A kind of contactor with wide-voltage range applies loop |
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