CN201796843U - Earth leakage protecting device of small-sized breaker - Google Patents
Earth leakage protecting device of small-sized breaker Download PDFInfo
- Publication number
- CN201796843U CN201796843U CN2010205322441U CN201020532244U CN201796843U CN 201796843 U CN201796843 U CN 201796843U CN 2010205322441 U CN2010205322441 U CN 2010205322441U CN 201020532244 U CN201020532244 U CN 201020532244U CN 201796843 U CN201796843 U CN 201796843U
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- mutual inductor
- zero sequence
- sequence current
- current mutual
- plate
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Abstract
The utility model provides an earth leakage protecting device of a small-sized breaker, which mainly solves the problem that the earth leakage protecting device of the existing small-sized breaker has low sensibility in leakage and tripping, and is characterized in that a zero sequence current mutual inductor (4) is an electromagnetic type zero sequence current mutual inductor, and a middle plate (2) is provided with a space capable of containing the zero sequence current mutual inductor (4), so that the zero sequence current mutual inductor (4) is arranged between a base (1) and a cover plate (3). In the utility model, the space for the installation of the zero sequence current mutual inductor is arranged in a shell body, the electromagnetic type zero sequence current mutual inductor with better performance is adopted, and under the circumstance of maintaining the original appearance structure and size of the shell body of the small-sized breaker, the sensibility of the leakage and tripping is improved; as long as current according with the protection of the earth leakage protecting device in the circuit is detected, the earth leakage protecting device conducts protection, and other power supply voltage is not needed.
Description
Technical field
The utility model relates to a kind of circuit breaker, belongs to a kind of earth leakage protective device of miniature circuit breaker.
Background technology
Existing miniature circuit breaker all is provided with earth leakage protective device, when electric leakage release is threaded off, and cuts off the electricity supply automatically, plays the safeguard protection effect.Earth leakage protective device mainly is made up of zero sequence current mutual inductor, arithmetic and control unit and magnetictrip; zero sequence current mutual inductor is mainly used in the detection induced current; then by arithmetic and control unit signal processing and amplifying; control the magnetictrip action at last; the action of promotion snap close; realize circuit breaker tripping, make the moving contact and the fixed contact disjunction of circuit breaker.Because the space in the miniature circuit breaker housing is limited, unreasonable structure, the zero sequence current mutual inductor that uses generally adopts electronic mutual inductor at present, and needing when this instrument transformer is worked provides voltage in the circuit, and the sensitivity that electric leakage is threaded off is low, has potential safety hazard.
The utility model content
Just for it is low and detect the deficiency that provide voltage that release is threaded off in the circuit is provided behind the leakage current to overcome sensitivity that the earth leakage protective device electric leakage of existing miniature circuit breaker threads off; the utility model provides a kind of earth leakage protective device of miniature circuit breaker; in housing, lay out the space that zero sequence current mutual inductor is installed; adopt the electromagnetic type zero sequence current mutual inductor of better performances; under the situation that does not change original miniature circuit breaker housing contour structures and size; improved the sensitivity that electric leakage is threaded off; need not to provide in the circuit voltage after making product detect electric leakage, release is threaded off.
The technical solution of the utility model is: a kind of earth leakage protective device of miniature circuit breaker; comprise base, middle plate, cover plate and zero sequence current mutual inductor; described zero sequence current mutual inductor is the electromagnetic type zero sequence current mutual inductor; plate is provided with the space that can hold zero sequence current mutual inductor in described, and zero sequence current mutual inductor is between base and the cover plate.
Plate is made up of big-and-middle plate and little middle two splits of plate in described, and described zero sequence current mutual inductor places between big-and-middle plate and the little plate.
Described big-and-middle plate is provided with a groove, and groove is built-in with arc control device.
Be inlaid with the lug plate that is electrically connected with bimetal leaf in the described little middle plate, be inlaid with the adjustment screw of regulating bimetal leaf on the described little middle plate.
The utlity model has following beneficial effect: owing to take such scheme, zero sequence current mutual inductor adopts the electromagnetic type zero sequence current mutual inductor of better performances, improved the sensitivity that electric leakage is threaded off, changed the installation site of zero sequence current mutual inductor, structure is compact more, reasonable.Between the base of housing and cover plate, lay out the space that zero sequence current mutual inductor is installed, under the situation that does not change original miniature circuit breaker housing contour structures and size, improved the sensitivity that electric leakage is threaded off.As long as detect the electric current that the protection that meets earth leakage protective device is arranged in the circuit, can implement protection, need not other supply voltages.
Description of drawings
Accompanying drawing 1 is a structure cutaway view of the present utility model.
Accompanying drawing 2 is outside drawings of the present utility model.
1-base among the figure, plate among the 2-, 3-cover plate, 4-zero sequence current mutual inductor, the big-and-middle plate of 5-, plate during 6-is little, 7-groove, 8-arc control device, 9-bimetal leaf, 10-lug plate, 11-adjustment screw.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing:
By Fig. 1 in conjunction with shown in Figure 2; a kind of earth leakage protective device of miniature circuit breaker; comprise base 1, middle plate 2, cover plate 3 and zero sequence current mutual inductor 4; described zero sequence current mutual inductor 4 is the electromagnetic type zero sequence current mutual inductor; plate 2 is provided with the space that can hold zero sequence current mutual inductor 4 in described, and zero sequence current mutual inductor 4 is between base 1 and the cover plate 3.Zero sequence current mutual inductor 4 adopts the electromagnetic type zero sequence current mutual inductor of better performances, improved the sensitivity that electric leakage is threaded off, changed the installation site of zero sequence current mutual inductor 4, structure is compact more, reasonable, between the base 1 of housing and cover plate 3, lay out the space that zero sequence current mutual inductor 4 is installed, under the situation that does not change original miniature circuit breaker housing contour structures and size, improved the sensitivity that electric leakage is threaded off.As long as the utility model detects the electric current that the protection that meets earth leakage protective device is arranged in the circuit, can implement protection, need not other supply voltages.
By shown in Figure 1, described middle plate 2 is made up of big-and-middle plate 5 and little middle 6 two splits of plate, and described zero sequence current mutual inductor 4 places between big-and-middle plate 5 and the little plate 6.Present embodiment is a kind of execution mode, and certainly, middle plate 2 also can be made into the structure that is interconnected on one, and purpose is to save the space that zero sequence current mutual inductor 4 is installed.
By shown in Figure 1, described big-and-middle plate 5 is provided with a groove 7, and groove 7 is built-in with arc control device 8.Arc control device 4 have increased the space of arc control device 8 between base 1 and cover plate 3, arc quenching effect is good.
By shown in Figure 1, be inlaid with the lug plate 10 that is electrically connected with bimetal leaf 9 in the described little middle plate 6, be inlaid with the adjustment screw 11 of regulating bimetal leaf 9 on the described little middle plate 6.Owing to zero sequence current mutual inductor 4 be used to wear in plate 2 place between base 1 and the cover plate 3, need the position of bimetal leaf 9 also to adjust, present embodiment can be adjusted bimetal leaf 9 easily by adjustment screw 11.
Claims (4)
1. the earth leakage protective device of a miniature circuit breaker; comprise base (1), middle plate (2), cover plate (3) and zero sequence current mutual inductor (4); it is characterized in that: described zero sequence current mutual inductor (4) is the electromagnetic type zero sequence current mutual inductor; plate (2) is provided with the space that can hold zero sequence current mutual inductor (4) in described, and zero sequence current mutual inductor (4) is between base (1) and the cover plate (3).
2. the earth leakage protective device of a kind of miniature circuit breaker according to claim 1; it is characterized in that: plate (2) is made up of big-and-middle plate (5) and little middle (6) two splits of plate in described, and described zero sequence current mutual inductor (4) places between big-and-middle plate (5) and the little plate (6).
3. the earth leakage protective device of a kind of miniature circuit breaker according to claim 2, it is characterized in that: described big-and-middle plate (5) is provided with a groove (7), and groove (7) is built-in with arc control device (8).
4. want the earth leakage protective device of 1,2 or 3 described a kind of miniature circuit breakers according to right; it is characterized in that: be inlaid with the lug plate (10) that is electrically connected with bimetal leaf (9) in the described little middle plate (6), be inlaid with the adjustment screw (11) of regulating bimetal leaf (9) on the described little middle plate (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205322441U CN201796843U (en) | 2010-09-16 | 2010-09-16 | Earth leakage protecting device of small-sized breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205322441U CN201796843U (en) | 2010-09-16 | 2010-09-16 | Earth leakage protecting device of small-sized breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201796843U true CN201796843U (en) | 2011-04-13 |
Family
ID=43851744
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205322441U Expired - Fee Related CN201796843U (en) | 2010-09-16 | 2010-09-16 | Earth leakage protecting device of small-sized breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201796843U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012045209A1 (en) * | 2010-10-09 | 2012-04-12 | Fang Huapeng | Miniature breaker |
-
2010
- 2010-09-16 CN CN2010205322441U patent/CN201796843U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012045209A1 (en) * | 2010-10-09 | 2012-04-12 | Fang Huapeng | Miniature breaker |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110413 Termination date: 20150916 |
|
| EXPY | Termination of patent right or utility model |