CN202197082U - Short circuit overcurrent protector - Google Patents
Short circuit overcurrent protector Download PDFInfo
- Publication number
- CN202197082U CN202197082U CN2011203660819U CN201120366081U CN202197082U CN 202197082 U CN202197082 U CN 202197082U CN 2011203660819 U CN2011203660819 U CN 2011203660819U CN 201120366081 U CN201120366081 U CN 201120366081U CN 202197082 U CN202197082 U CN 202197082U
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- CN
- China
- Prior art keywords
- circuit
- short circuit
- electromagnetic relay
- excitation coil
- 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 short circuit overcurrent protector, which comprises a switch button and further comprises an excitation coil and a leakage protector which are in series connection with the switch button, an excitation current output end of the excitation coil is sequentially in series connection with a gear selection circuit, a rectification filter circuit, a current amplification circuit and an electromagnetic relay. The output end of the electromagnetic relay is connected with the leakage current input end of the leakage protector, and the gear selection circuit is connected with a gear selection switch. The short circuit overcurrent protector has the advantages that 1, the structure is simple; and 2, when overcurrent or short circuit appears in a main circuit, excitation current generated by the excitation coil is increased rapid, and the excitation current is rectified, filtered and amplified, then triggers the electromagnetic relay to be closed, and then triggers the leakage protector to be opened, thereby protecting the whole circuit and load.
Description
Technical field
The utility model relates to a kind of circuit protection device, particularly a kind of short circuit overcurrent protector.
Background technology
In daily life, we can use various electrical equipment, so safety utilization of electric power is particularly important; But in the family, earth leakage protective device only is installed usually, and electric leakage when taking place in the electric wire that earth leakage protective device can only be in the family; Just can trigger outage, thereby protection range is limited, in case short circuit or overcurrent occur; Earth leakage protective device can not trigger outage, thereby potential safety hazard is big.
Summary of the invention
The problem that the utility model will solve is: provide a kind of simple in structure, can under the situation of short circuit and overcurrent, trigger the outage the short circuit overcurrent protector.
In order to solve the problems of the technologies described above; The short circuit overcurrent protector of the utility model; Comprise shift knob; Also comprise the excitation coil and the earth leakage protective device that are in series with shift knob, the exciting current output of said excitation coil selects circuit, current rectifying and wave filtering circuit, electric current amplification path and electromagnetic relay to be in series with gear successively, and the output of said electromagnetic relay links to each other with the leakage current input of earth leakage protective device.
For the ease of selecting the gear of overcurrent, the short circuit overcurrent protector of the utility model, said gear select circuit to link to each other with GSS Gear Select Switch.
The beneficial effect that the utility model is obtained is: (1) is simple in structure; (2) when occurring overcurrent or short circuit in the main circuit; The exciting current that excitation coil produced sharply increases, and this exciting current is through rectifying and wave-filtering and after amplifying, and it is closed to trigger electromagnetic relay; And then trigger earth leakage protective device and break off, thereby entire circuit and load are protected.
Description of drawings
Fig. 1 is the frame construction drawing of the utility model.
Among the figure: 1, shift knob, 2, excitation coil, 3, earth leakage protective device, 4, load, 5, GSS Gear Select Switch, 6, gear selects circuit, 7, current rectifying and wave filtering circuit, 8, current amplification circuit, 9, electromagnetic relay.
Embodiment
As shown in Figure 1; The short circuit overcurrent protector of the utility model; Comprise excitation coil 2 and earth leakage protective device 3 that shift knob 1, shift knob 1 are in series; The exciting current output of said excitation coil 1 selects circuit 6, current rectifying and wave filtering circuit 7, electric current amplification path 8 and electromagnetic relay 9 to be in series with gear successively, and the output of said electromagnetic relay 9 links to each other with the leakage current input of earth leakage protective device 3; Said gear selects circuit 6 to link to each other with GSS Gear Select Switch 5.
In the time of concrete the use, according to the size of load 4 power that link to each other with earth leakage protective device 3, the GSS Gear Select Switch 5 of being open to the custom is selected gear; The utility model is provided with seven gears from 800W to 5800W, selected gear after, open shift knob 1; Load this moment 4 operate as normal, the exciting current that excitation coil 2 produces is zero, when overcurrent or short circuit appear in load 4; The exciting current that excitation coil 2 produces sharply increases, and this exciting current drives electromagnetic relay 9 closures through rectifying and wave-filtering and amplification; Break off thereby trigger earth leakage protective device 3, realize overcurrent and short-circuit protection entire circuit and load.
The utility model is not limited to above-mentioned execution mode, and anyone should learn the structural change of under the enlightenment of the utility model, making, every with the utlity model has identical or close technical scheme, all fall within the protection range of the utility model.
Claims (2)
1. short circuit overcurrent protector; Comprise shift knob (1); It is characterized in that: also comprise the excitation coil (2) and the earth leakage protective device (3) that are in series with shift knob (1); The exciting current output of said excitation coil (1) selects circuit (6), current rectifying and wave filtering circuit (7), electric current amplification path (8) and electromagnetic relay (9) to be in series with gear successively, and the output of said electromagnetic relay (9) links to each other with the leakage current input of earth leakage protective device (3).
2. short circuit overcurrent protector according to claim 1 is characterized in that: said gear selects circuit (6) to link to each other with GSS Gear Select Switch (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203660819U CN202197082U (en) | 2011-09-08 | 2011-09-08 | Short circuit overcurrent protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203660819U CN202197082U (en) | 2011-09-08 | 2011-09-08 | Short circuit overcurrent protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202197082U true CN202197082U (en) | 2012-04-18 |
Family
ID=45951981
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203660819U Expired - Fee Related CN202197082U (en) | 2011-09-08 | 2011-09-08 | Short circuit overcurrent protector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202197082U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108592355A (en) * | 2018-05-17 | 2018-09-28 | 广东美的制冷设备有限公司 | Control box and air-conditioning system |
| CN110954237A (en) * | 2019-11-22 | 2020-04-03 | 奇瑞汽车股份有限公司 | Engine coolant temperature sensor and vehicle |
-
2011
- 2011-09-08 CN CN2011203660819U patent/CN202197082U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108592355A (en) * | 2018-05-17 | 2018-09-28 | 广东美的制冷设备有限公司 | Control box and air-conditioning system |
| CN110954237A (en) * | 2019-11-22 | 2020-04-03 | 奇瑞汽车股份有限公司 | Engine coolant temperature sensor and vehicle |
| CN110954237B (en) * | 2019-11-22 | 2021-11-30 | 奇瑞汽车股份有限公司 | Engine coolant temperature sensor and vehicle |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120418 Termination date: 20130908 |