CN204884922U - Electric switch device - Google Patents
Electric switch device Download PDFInfo
- Publication number
- CN204884922U CN204884922U CN201520323924.5U CN201520323924U CN204884922U CN 204884922 U CN204884922 U CN 204884922U CN 201520323924 U CN201520323924 U CN 201520323924U CN 204884922 U CN204884922 U CN 204884922U
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- CN
- China
- Prior art keywords
- contact assembly
- contact
- assembly
- switching device
- electrical apparatus
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- 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.)
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Abstract
The utility model discloses an electric switch device, include: the first contact subassembly and the second contact subassembly of establishing ties, wherein first contact subassembly has trouble current -limiting ability, breaks down, and first contact subassembly divides absolutely prior to second contact subassembly. The utility model discloses an electric switch device arranges through the position that to make two contact subassemblies to divide according to fixed order disconnected with breaking current setting, avoids appearing the disconnected sequence error of branch that causes because the performance mismatches to avoid component damage or electrical accident.
Description
Technical field
The utility model relates to Low Voltage Electrical Apparatus, more particularly, relates to a kind of electrical apparatus-switching device.
Background technology
Be arranged in industrialized technical equipment and be generally used for three-phase alternating-current motor for controlling and connecting big current and high-tension switching device, this switching device is also referred to as motor starter.Switching device as motor starter has following function usually in order to protect motor:
1) motor is connected or disconnected by service requirement.This function is by being called that the standard cell of contactor realizes.Contactor is used for repeating to connect or disconnect operating current according to service requirement.
2) for motor provides short-circuit protection and overload protection.Short-circuit protection and overload protection are generally be integrated in be called in the standard cell of circuit breaker.When there is short circuit or produce overload big current, circuit breaker is by power consumption equipment, and namely motor disconnects from power supply network.
In conventional design, two standard cells, namely contactor and circuit breaker to be disposed in parallel on a common support and to form switching device.This switching device needs in-site installation to match, and takes up room large, and requires that professional and technical personnel grasps fully the characteristic of each element, just can carry out designing the electrical system be suitable for.If grasp abundant not to element characteristic, it is improper to mate.When an error occurs, due to the existence of electrodynamic repulsion force, the contact of contactor can cause component wear even to have an impact to electrical system prior to the contact disjunction of circuit breaker.
Utility model content
The utility model is intended to propose a kind of electrical apparatus-switching device without the need to matching components characteristics.
According to an embodiment of the present utility model, propose a kind of electrical apparatus-switching device, comprising: the first contact assembly of series connection and the second contact assembly, wherein the first contact assembly has failure current limit ability, break down, the first contact assembly is prior to the second contact assembly disjunction.
In one embodiment, the first contact assembly is connected with Control protection assembly, and Control protection assembly is connected with the second contact assembly.First contact assembly, Control protection assembly and the second contact assembly are placed in switching device body.
In one embodiment, Control protection assembly control operation mechanism and electromagnet.
In one embodiment, the first contact assembly is the double-break bridging contact assembly with current limiting capacity.
In one embodiment, the contact of the first contact assembly separation or closed to be controlled by operating mechanism.
In one embodiment, break down, the electric current being greater than fault breaking current flows through the first contact assembly, and electrodynamic repulsion force makes the contact separation of the first contact assembly, and the contact of the first contact assembly is remained on separation point position by operating mechanism.
In one embodiment, the second contact assembly is double-break bridging contact assembly.
In one embodiment, the separation or closed by magnet control of the contact of the second contact assembly.
By location arrangements and breaking current, electrical apparatus-switching device of the present utility model is arranged so that two contact assemblies can according to fixing order disjunction, avoid occurring not mating due to performance and the disjunction sequence error that causes, thus avoid element damage or electric fault.
Accompanying drawing explanation
The above and other feature of the utility model, character and advantage are by more obvious by what become below in conjunction with the description of drawings and Examples, and Reference numeral identical in the accompanying drawings represents identical feature all the time, wherein:
Fig. 1 discloses the structural configuration schematic diagram of the electrical apparatus-switching device according to an embodiment of the present utility model.
Fig. 2 discloses the structural representation of the electrical apparatus-switching device according to an embodiment of the present utility model.
Embodiment
The utility model proposes a kind of electrical apparatus-switching device, comprise the first contact assembly and second contact assembly of series connection, wherein the first contact assembly has failure current limit ability, and when a failure occurs it, the first contact assembly is prior to the second contact assembly disjunction.First contact assembly and the second contact assembly are integrated in a switching device body.When there is the big current such as short circuit current or overload current; if electric current has exceeded the fault breaking current of the first contact assembly; first contact assembly can be opened prior to the second contact assembly; play the effect of short circuit or overload protection, prevent the contact caused due to electrodynamic repulsion force from disconnecting sequence error and the component wear that causes or electric fault.
With reference to shown in figure 1 and shown in Fig. 2, disclose the structural representation of the electrical apparatus-switching device according to an embodiment of the present utility model.In the illustrated embodiment in which, the first contact assembly 102 is connected with Control protection assembly 103, and Control protection assembly 103 is connected with the second contact assembly 104.First contact assembly 102, Control protection assembly 103 and the second contact assembly 104 are placed in switching device body 101.First contact assembly 102, Control protection assembly 103 and the second contact assembly 104 are integrated in switching device body 101, eliminate site-assembled operation, simplify operating procedure.
First contact assembly 102 can be the double-break bridging contact assembly with current limiting capacity.First contact assembly 102 plays the function of circuit breaker, provides short circuit and overload protection, and bridge-type double breaking points can provide than single-break the electrodynamic repulsion force and larger clearance between open contacts that more strengthen, thus provides better current limiting capacity.Second contact assembly 104 is double-break bridging contact assemblies.Second contact assembly 104 plays the function of contactor, connects or disconnects operating current by service requirement.
Control protection assembly 103 can control operation mechanism and electromagnet.In one embodiment, the contact of the first contact assembly 102 separation or closed to be controlled by operating mechanism.First contact assembly 102 comprises operating mechanism and operating mechanism is controlled by Control protection assembly 103.In one embodiment, the separation or closed by magnet control of the contact of the second contact assembly 104.Second contact assembly 104 comprises electromagnet and electromagnet is controlled by Control protection assembly 103.When being greater than the electric current of breaking current, when such as short circuit current or overload current flow through the first contact assembly, electrodynamic repulsion force makes the contact separation of the first contact assembly, the contact of the first contact assembly is remained on separation point position by operating mechanism, first contact assembly is disconnected prior to the second contact assembly, guarantees that electrical apparatus-switching device can disconnect in order.
Specifically, when being produced by short circuit current or overload current in the loop of electrical apparatus-switching device, this big current (short circuit or overload current) flows through the first contact assembly 102, make to produce electrodynamic repulsion force between the dynamic/static contact of the first contact assembly 102, electrodynamic repulsion force makes the moving contact of the first contact assembly 102 move to the direction away from fixed contact, and now the first contact assembly 102 disconnects.After first contact assembly 102 disconnects, electric current is cut off, and electrodynamic repulsion force disappears, and the moving contact of the first contact assembly 102 can fall after rise towards the direction of fixed contact.Again contact at the dynamic/static contact of the first contact assembly 102, before namely the first contact assembly 102 closes again, the first contact assembly 102 is remained on open position by operating mechanism action, and like this, the first contact assembly 102 is maintained at off-state.Because rate of current is far away higher than the speed that contact is scolded out, therefore before the contact at the first contact assembly 102 is scolded out by electrodynamic repulsion force, big current can continue to flow through the second contact assembly 104, produce electrodynamic repulsion force equally between the dynamic/static contact of the second contact assembly 104, the moving contact of the second contact assembly 104 moves to away from fixed contact direction under the effect of electrodynamic repulsion force.After second contact assembly 104 disconnects, electric current is cut off, and electrodynamic repulsion force disappears, and the moving contact of the second contact assembly 104 can fall after rise towards the direction of fixed contact.Electromagnet is now failure to actuate, and therefore the moving contact of the second contact assembly 104 can fall back to and again close with fixed contact, and namely the second contact assembly 104 closes.From said process, because the first contact assembly 102 is in the front of the second contact assembly 104 on electric wiring, therefore the first contact assembly 102 can disconnect prior to the second contact assembly 104 all the time.In addition, the first contact assembly 102 has failure current limit function, and when electric current reaches the fault breaking current of the first contact assembly 102, the first contact assembly 102 disconnects, and cuts off circuit.Therefore the electric current flowing through the second contact assembly 104 can not cause damage to the second contact assembly 104.
By location arrangements and breaking current, electrical apparatus-switching device of the present utility model is arranged so that two contact assemblies can according to fixing order disjunction, avoid occurring not mating due to performance and the disjunction sequence error that causes, thus avoid element damage or electric fault.
Above-described embodiment is available to be familiar with person in the art to realize or to use of the present utility model; those skilled in the art can when not departing from utility model thought of the present utility model; various modifications or change are made to above-described embodiment; thus protection range of the present utility model not limit by above-described embodiment, and should be the maximum magnitude meeting the inventive features that claims are mentioned.
Claims (7)
1. an electrical apparatus-switching device; it is characterized in that; comprise: the first contact assembly, Control protection assembly and the second contact assembly; described first contact assembly is connected with Control protection assembly; described Control protection assembly is connected with the second contact assembly; wherein the first contact assembly has failure current limit ability, breaks down, and the first contact assembly is prior to the second contact assembly disjunction.
2. electrical apparatus-switching device as claimed in claim 1, it is characterized in that, described first contact assembly, Control protection assembly and the second contact assembly are placed in switching device body.
3. electrical apparatus-switching device as claimed in claim 2, is characterized in that, described Control protection assembly control operation mechanism and electromagnet.
4. electrical apparatus-switching device as claimed in claim 3, it is characterized in that, described first contact assembly is the double-break bridging contact assembly with current limiting capacity.
5. electrical apparatus-switching device as claimed in claim 4, is characterized in that, the separation of the contact of described first contact assembly or closedly to be controlled by operating mechanism.
6. electrical apparatus-switching device as claimed in claim 3, it is characterized in that, described second contact assembly is double-break bridging contact assembly.
7. electrical apparatus-switching device as claimed in claim 6, is characterized in that, the separation or closed by magnet control of the contact of described second contact assembly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520323924.5U CN204884922U (en) | 2015-05-19 | 2015-05-19 | Electric switch device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520323924.5U CN204884922U (en) | 2015-05-19 | 2015-05-19 | Electric switch device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204884922U true CN204884922U (en) | 2015-12-16 |
Family
ID=54829271
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520323924.5U Active CN204884922U (en) | 2015-05-19 | 2015-05-19 | Electric switch device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204884922U (en) |
-
2015
- 2015-05-19 CN CN201520323924.5U patent/CN204884922U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |