CN2483875Y - Protector for electric appliance circuit - Google Patents
Protector for electric appliance circuit Download PDFInfo
- Publication number
- CN2483875Y CN2483875Y CN 01220134 CN01220134U CN2483875Y CN 2483875 Y CN2483875 Y CN 2483875Y CN 01220134 CN01220134 CN 01220134 CN 01220134 U CN01220134 U CN 01220134U CN 2483875 Y CN2483875 Y CN 2483875Y
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- CN
- China
- Prior art keywords
- temperature
- utility
- fuse
- model
- circuit
- 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 an electrical work circuit protecting device which comprises a shell and the insulated internal circuit provided therein, the internal circuit comprises a thermistor PTC, a temperature sensitive deformed element and a fuse in successive series connection, the other end of the thermistor PTC is connected with the power, the other end of the fuse is connected with an electric device; the utility model can remove faults and resume power in case of transient faults and temporary faults, the utility model can cut off circuit irreversibly in case of permanent faults so that the protecting device is free from burning out in case of the repeated connection of circuit, meanwhile, the utility model can prevent the protecting device form fatigue damage in case of the repeated operation of the device itself; the utility model has a simple structure and a high reliability.
Description
The utility model relates to a kind of appliance circuit protective device that is used for the unattended operation station, is a kind of circuit protection device that moves owing to overcurrent or other unusual electric operating mode specifically.
In the prior art, such as fuse commonly used at present, will once fuse when circuit overloads or short circuit take place, each fusing all must could continue to restore electricity after fault is got rid of and artificially changed fuse.An automatic reclosing commonly used and secondary automatic reclosing, their are distinguished for once or twice auto restore facility, when power consumption equipment generation temporary fault, or they are because the energising number of times is few and can not remove fault, even also can't recover energising after perhaps removing fault.The present electronic circuit protector more complicated of using, reliability can not get guaranteeing.The patent No. is 85201165 Chinese utility model patent " no fuse failure device " though have the function of repeatedly cutting off circuit and recovering energising automatically, and this utility model can cause accident to enlarge for permanent fault because it constantly recovers energising and cause that power consumption equipment burns.In addition, the above power consumption equipment protective device all will not protect power consumption equipment and autoprotection to consider simultaneously.
The purpose of this utility model is to provide a kind of and allows circuit to carry out several times disconnection and recovery energising at transient fault and temporary fault; at the appliance circuit protective device that no longer recovers energising after the permanent fault circuit disconnection, this apparatus structure is simple, reliability is high.
The utility model adopts following scheme to be achieved: this appliance circuit protective device comprise shell and with the internal circuit of its insulation; its internal circuit is composed in series successively by temperature-sensitive element PTC, temperature distortion element and fuse; another termination power of temperature-sensitive element PTC; another termination power consumption equipment of fuse, the temperature distortion element can adopt marmem or bimetal leaf.
The utility model has following advantage: for transient fault (as the discharge of thunderbolt flashover), the at first action because the response time of temperature-sensitive element PTC is the shortest is just recover energising afterwards automatically; For temporary fault, also be that temperature-sensitive element PTC at first moves several times, perhaps then marmem or bimetal leaf also participate in action, fault is eliminated (being burnt as small worm) after the energising several times, temperature-sensitive element PTC and marmem or bimetal leaf recover "on" position all automatically, needn't manual intervention, be applicable to that unattended operation station power consumption equipment protects when transient fault or temporary fault take place; And it is (harmful for permanent fault as the plague of rats or snake; and metal foreign object short circuit); after temperature-sensitive element PTC and marmem or the bimetal leaf action several times; finally cause the fuse action owing to the thermal accumlation on fusible link; circuit is disconnected and recover no longer automatically and switch on; circuit is unlikely ceaselessly to be disconnected; overlap; but also do not cause at protected equipment under the situation of cause thermal damage; accomplish permanent disconnection; up to hand inspection and after eliminating permanent fault; circuit is resumed operation; thereby both protected power consumption equipment, protected protective device itself again, and made it to have reduced fatigue damage and prolong its useful life.This protective device is simple in structure in addition, reliability is high.
Fig. 1 is each element syndeton schematic diagram of appliance circuit protective device.
Below in conjunction with accompanying drawing the utility model is described in further detail:
This appliance circuit protective device comprise shell 4 and with the internal circuit of its insulation; its internal circuit is composed in series successively by temperature-sensitive element PTC1, temperature distortion element 2 and fuse 3; another termination power of temperature-sensitive element PTC1; another termination power consumption equipment of fuse 3, temperature distortion element 2 can adopt marmem or bimetal leaf.Because causing the final cause of above each element action is temperature, and the operating temperature of each element is because electric current integration in time produces heat, the accumulation of heat causes the rising of temperature again, so the relation of the parameters relationship available current between these three elements is described, i.e. the operating current I of temperature-sensitive element PTC1
1Can be 1.2 times of power consumption equipment rated current In, the operating current I of temperature distortion element 2
2Can be I
11.2～1.5 times, the operating current I of fuse 3
3Can be I
21.2～1.5 times.
The operation principle of temperature-sensitive element PTC1 is to change resistance sensitively according to the temperature of element, and resistance becomes very big from approaching zero, and to general low pressure and electronic loop, resistance is almost infinity.This variation is when a certain specified temp that is takes place under a certain function of current and sharp, operate time T
1Below Millisecond.Marmem temperature after increasing by its electric current raises gradually, is out of shape suddenly when reaching certain specified temp; Bimetal leaf also can be out of shape gradually along with temperature raises.After marmem or the bi-metal plate deformed contact is disconnected.After marmem or bimetal leaf were selected according to its weight or shape, it can be at a period of time T that surpasses rated current
2The back action, this time T
2Compare T
1Grow.The fuse of fuse 3 makes it act on several times post-arrival time T repeatedly at certain electric current through suitably selected
3The i.e. fusing of Shi Fasheng action, this fusing time T
3(counting during short circuit from beginning) should be selected greater than T
2
Under certain overload current or short circuit current effect, as T operate time of the first pipe protection barrier temperature-sensitive element PTC1
1Be Millisecond; T operate time as the second pipe protection barrier shapes memorial alloy or bimetal leaf
2Than T
1Being length, is just to begin action after temperature-sensitive element PTC1 action several times; T operate time of the 3rd road barrier fuse 3
3Than T
2Being length, is just to begin action after marmem or bimetal leaf action several times.This device just can be removed fault and recover energising automatically by temperature-sensitive element PTC1 action several times or by marmem or bimetal leaf action several times for transient fault or temporary fault; This device is for permanent fault, by temperature-sensitive element PTC1 action several times or by not removing fault behind marmem or the bimetal leaf action several times and finally causing the fuse thermal accumlation and fusible link is blown.
Claims (3)
1. appliance circuit protective device; comprise shell (4) and with the internal circuit of its insulation; it is characterized in that: internal circuit is composed in series successively by temperature-sensitive element PTC (1), temperature distortion element (2) and fuse (3); another termination power of temperature-sensitive element PTC (1), another termination power consumption equipment of fuse (3).
2. appliance circuit protective device as claimed in claim 1 is characterized in that: temperature distortion element (2) can adopt marmem or bimetal leaf.
3. appliance circuit protective device as claimed in claim 1 or 2 is characterized in that: the operating current I of temperature-sensitive element PTC (1)
1Be 1.2 times of power consumption equipment rated current In, the operating current I of temperature distortion element (2)
2Be I
11.2～1.5 times, the operating current I of fuse (3)
3Be I
21.2～1.5 times.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01220134 CN2483875Y (en) | 2001-04-24 | 2001-04-24 | Protector for electric appliance circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01220134 CN2483875Y (en) | 2001-04-24 | 2001-04-24 | Protector for electric appliance circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2483875Y true CN2483875Y (en) | 2002-03-27 |
Family
ID=33637795
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01220134 Expired - Fee Related CN2483875Y (en) | 2001-04-24 | 2001-04-24 | Protector for electric appliance circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2483875Y (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101718832B (en) * | 2009-11-17 | 2012-01-04 | 深圳市科陆电子科技股份有限公司 | High-voltage line fault detection device and detection method |
| CN101728819B (en) * | 2009-11-20 | 2012-05-30 | 深圳市科陆电子科技股份有限公司 | Intelligent switch and control method thereof |
| CN102761205A (en) * | 2011-04-26 | 2012-10-31 | 罗伯特·博世有限公司 | Commutator for electrical starter motor |
| CN105207170A (en) * | 2015-08-13 | 2015-12-30 | 郑遥 | Improved fuse mechanism |
| CN109243939A (en) * | 2018-08-27 | 2019-01-18 | 西安中熔电气股份有限公司 | A kind of low-power consumption high response speed circuit protection device |
| CN116131037A (en) * | 2023-02-24 | 2023-05-16 | 深圳市振欢电子有限公司 | Explosion-proof type power adapter |
-
2001
- 2001-04-24 CN CN 01220134 patent/CN2483875Y/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101718832B (en) * | 2009-11-17 | 2012-01-04 | 深圳市科陆电子科技股份有限公司 | High-voltage line fault detection device and detection method |
| CN101728819B (en) * | 2009-11-20 | 2012-05-30 | 深圳市科陆电子科技股份有限公司 | Intelligent switch and control method thereof |
| CN102761205A (en) * | 2011-04-26 | 2012-10-31 | 罗伯特·博世有限公司 | Commutator for electrical starter motor |
| CN102761205B (en) * | 2011-04-26 | 2015-03-11 | 罗伯特·博世有限公司 | Commutator for electrical starter motor |
| CN105207170A (en) * | 2015-08-13 | 2015-12-30 | 郑遥 | Improved fuse mechanism |
| CN109243939A (en) * | 2018-08-27 | 2019-01-18 | 西安中熔电气股份有限公司 | A kind of low-power consumption high response speed circuit protection device |
| CN109243939B (en) * | 2018-08-27 | 2024-04-16 | 西安中熔电气股份有限公司 | Low-power consumption high response speed circuit protection device |
| CN116131037A (en) * | 2023-02-24 | 2023-05-16 | 深圳市振欢电子有限公司 | Explosion-proof type power adapter |
| CN116131037B (en) * | 2023-02-24 | 2023-10-20 | 深圳市振欢电子有限公司 | Explosion-proof type power adapter |
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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 |