CN2893892Y - Starting protective switch - Google Patents
Starting protective switch Download PDFInfo
- Publication number
- CN2893892Y CN2893892Y CN 200620082720 CN200620082720U CN2893892Y CN 2893892 Y CN2893892 Y CN 2893892Y CN 200620082720 CN200620082720 CN 200620082720 CN 200620082720 U CN200620082720 U CN 200620082720U CN 2893892 Y CN2893892 Y CN 2893892Y
- Authority
- CN
- China
- Prior art keywords
- switch
- circuit
- electrical equipment
- current
- electric current
- 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 a start-up protective switch, comprising a switch K1, a switch K2 which connects with the swich K1 in parallel to buffer change of current in the circuit upon closing of the protective switch after making connection in series, and a choke device consisting of an electric induction coil, L. The utility model effectively eliminates hazard of the pulse current in the circuit in operation of electric appliances.
Description
Technical field
The utility model relates to the safety guard in a kind of electrical equipment opening device, especially relates to a kind of startup protection switch.
Background technology
Because electric energy convenience in the use, the economy and the feature of environmental protection are that the electric equipment of the energy has obtained using widely socially with the electricity, no matter be in industrial enterprise, still in the daily life of daily life, be that the electric equipment of the energy is seen everywhere with the electricity.Especially in daily life, electrical equipment is to become the requisite life instrument of people.People are when using these electrical equipment, and adopt switch control power supply is electric power supply more, make electrical equipment obtain electricity work.It is some common power switch that but the switch that current people use mostly is; they are when closure is used; because the operating resistance in the electrical equipment can be when a lower temperature progressively rises to operate as normal temperature; therefore; its resistance also can progressively rise to normal work resistance from a smaller value; like this; electric current in the circuit will increase to a maximum at instantaneous time from zero; produce a pulse current; and the maximum of this pulse current can reach 5～10 times of the electrical equipment rated current sometimes; and all such pulse current can appear each open circuit the time; this pulse current is a very large influence to electrical equipment, directly can influence the useful life of electrical equipment, even burns electrical equipment sometimes then and there; or the protective device in the puncture electrical equipment, the person is damaged or initiation fire.In order to eliminate this unsafe factor, people have adopted various measures and method, have also produced various switches and have solved this unsafe factor, but, these switches that people produce, complex structure mostly, people are unusual inconvenience when in use, and costs an arm and a leg.
Summary of the invention
The technical problems to be solved in the utility model has provided a kind of startup protection switch, and it not only can effectively solve the current people harm that the pulse current in the circuit brings when making electrical appliance, and simple in structure, easy to use, cheap.
For solving the problems of the technologies described above, the technical solution of the utility model is: start protection switch, comprise K switch
1, described protection switch also is provided with and K switch
1The choke that electric current changes in the circuit when delaying switch closure in parallel.
As a kind of optimal way, described choke comprises the K switch that is connected in series
2With inductance coil L.
Adopt the startup protection switch of said structure; owing to be to have adopted the choke that is provided with a switch in parallel; like this in the protection switch closure; because choke has delayed the variation of electric current in the circuit; make the electric current increase progressively in the circuit, make operating resistance preheating in the electrical equipment to reach specified resistance, the generation of pulse electric current when having avoided adopting regular tap; eliminate pulse current to the harm that electrical equipment causes, protected the safety of people's the person and property.And adopt behind the switch series connection inductance coil and another switch in parallel, the mode of Closing Switch progressively, make electric current earlier under the choking effect of inductance coil, increase progressively, make operating resistance preheating in the electrical equipment to reach specified resistance, closed then another switch is an electric power supply, to avoid the generation of pulse current.
Description of drawings
Below in conjunction with accompanying drawing embodiment of the present utility model is further described:
Accompanying drawing is the circuit connection diagram in the startup protection switch of the present utility model.
Embodiment
With reference to accompanying drawing, a kind of startup protection switch of the present utility model is: comprise a regular tap K
1, also be provided with and K switch in this protection switch
1In parallel to delay the protection switch choke that electric current changes in the circuit when closed, this choke comprises another regular tap K
2With inductance coil L, K switch
2With after inductance coil L connects again with K switch
1In parallel to constitute the circuit of whole startup protection switch, like this, the K switch of series connection
2Just constituted K switch with inductance coil L
1A current bypass.
When starting the protection switch use, first closure is connected the K switch that starts in the appliance circuit in the protection switch
2, electric current is via K switch
2With inductance coil L be electric power supply, under the choking effect of inductance coil L, the electric current in the circuit slowly increases, the operating resistance preheating in the electrical equipment reaches specified resistance, simultaneously, the electric current in the circuit is also in progressively increase, then, Closing Switch K
1, realize power supply fully to electrical equipment.In powered-down, adopt opposite closing sequence, promptly first off switch K
1, the electric current in the circuit under the choking effect of inductance coil L, reducing progressively, then, off switch K
2, the complete electric current in the open circuit adopts the mode of such powered-down, reduced the generation that electric spark is located in each contact in the circuit, guaranteed the safe handling of electrical equipment.
Though adopted among the embodiment of this startup protection switch be behind the switch series connection inductance coil with the mode of another switch in parallel; eliminate the generation of circuit pulse electric current when closure is electric power supply; equally; the mode with a switch in parallel is used after a big divider resistance and the switch series connection in employing again in circuit, electric current is to the infringement of electrical equipment in the time of also reducing closing of circuit.
Claims (2)
1, starts protection switch, comprise K switch
1, it is characterized in that: described protection switch also is provided with and K switch
1In parallel to delay the protection switch choke that electric current changes in the circuit when closed.
2, startup protection switch according to claim 1, it is characterized in that: described choke comprises the K switch that is connected in series
2With inductance coil L.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620082720 CN2893892Y (en) | 2006-04-04 | 2006-04-04 | Starting protective switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620082720 CN2893892Y (en) | 2006-04-04 | 2006-04-04 | Starting protective switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2893892Y true CN2893892Y (en) | 2007-04-25 |
Family
ID=38062046
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620082720 Expired - Fee Related CN2893892Y (en) | 2006-04-04 | 2006-04-04 | Starting protective switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2893892Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107070197A (en) * | 2016-12-30 | 2017-08-18 | 苏州佳世达光电有限公司 | Power supply circuit and projection arrangement |
| CN110741456A (en) * | 2017-04-21 | 2020-01-31 | 奥马萨瓦尔有限公司 | Operating device and method |
-
2006
- 2006-04-04 CN CN 200620082720 patent/CN2893892Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107070197A (en) * | 2016-12-30 | 2017-08-18 | 苏州佳世达光电有限公司 | Power supply circuit and projection arrangement |
| CN110741456A (en) * | 2017-04-21 | 2020-01-31 | 奥马萨瓦尔有限公司 | Operating device and method |
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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 |