CN205159250U - Miniature circuit breaker electromagnetism is threaded off - Google Patents
Miniature circuit breaker electromagnetism is threaded off Download PDFInfo
- Publication number
- CN205159250U CN205159250U CN201520975503.0U CN201520975503U CN205159250U CN 205159250 U CN205159250 U CN 205159250U CN 201520975503 U CN201520975503 U CN 201520975503U CN 205159250 U CN205159250 U CN 205159250U
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- CN
- China
- Prior art keywords
- iron core
- yoke
- circuit breaker
- rear side
- static iron
- Prior art date
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Abstract
The utility model relates to a technical field of circuit arrangement especially relates to a miniature circuit breaker electromagnetism is threaded off, the utility model discloses a miniature circuit breaker electromagnetism is threaded off uses more reliably, include yoke, coil, reaction spring, quiet iron core, move iron core and ejector pin, the inside of yoke is provided with places the chamber, the front side and the rear side of yoke are provided with the through -hole respectively, quiet iron core is located places the intracavity to the edge of quiet iron core passes through the fixed axle and fixes the through -hole department at the yoke rear side, it is located and places the intracavity to move the iron core to be located the through -hole department of yoke front side, it is located the fixed axle to move the iron core to can be on the fixed axle lateral sliding, the reaction spring suit is in the outside of fixed axle to reaction spring's one end and the contact of quiet iron core, the other end with move the iron core contact, the coil is located the intracavity of placing of yoke to the coil is located the outside of moving iron core and quiet iron core, the ejector pin with move iron core installation together.
Description
Technical field
The utility model relates to the technical field of circuit arrangement, particularly relates to a kind of miniature circuit breaker electromagnetic trip.
Background technology
As everyone knows, electromagnetic tripping system, as the transient protection workpiece of MCB, is a kind of current mode electromagnet; along with the development of science and technology, the raising of social life level, the load of resident's electric equipment is increasing; once break down, short circuit current also can be thereupon increasing.The short-circuit protection function of the miniature circuit breaker (MiniatureCircuitBreaker, MCB) of current research and development is generally realized by electromagnetic tripping system.The action of electromagnetic tripping system is sensitiveer, and operate time is shorter, presents the time of arc voltage also more early in fragmentation procedure, highly beneficial to current limliting segmentation.Therefore, research and design electromagnetic tripping system is to protective device equipment and electric wiring important in inhibiting thereof.
Utility model content
For solving the problems of the technologies described above, the utility model provides a kind of and uses more reliable miniature circuit breaker electromagnetic trip.
Miniature circuit breaker electromagnetic trip of the present utility model, comprise yoke, coil, reaction spring, static iron core, dynamic iron core and push rod, the inside of described yoke is provided with placed cavity, front side and the rear side of described yoke are respectively arranged with through hole, described static iron core is positioned at placed cavity, and the edge of static iron core is fixed on the through hole on rear side of yoke by fixed axis, described dynamic iron core is positioned at placed cavity, and the through hole be positioned on front side of yoke, described dynamic iron core is positioned on fixed axis, and can self-retaining axle laterally slide; Described reaction spring is sleeved on the outside of fixed axis, and one end of reaction spring contacts with static iron core, and the other end contacts with dynamic iron core; Described coil is positioned at the placed cavity of yoke, and coil is positioned at the outside of dynamic iron core and static iron core; Described push rod and dynamic iron core are installed together.
Miniature circuit breaker electromagnetic trip of the present utility model, the rear side of described static iron core is provided with collar, described static iron core is fixed on the through hole on rear side of yoke by collar, and the inside of described static iron core is provided with rear perforation, the rear side of described dynamic iron core is provided with front perforation, and described fixed axis passes rear perforation from back to front and stretches in front perforation.
Miniature circuit breaker electromagnetic trip of the present utility model, described collar and static iron core are structure as a whole.
Compared with prior art the beneficial effects of the utility model are: by above-mentioned setting, can reach more reliable result of use.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Embodiment
Below in conjunction with drawings and Examples, embodiment of the present utility model is described in further detail.Following examples for illustration of the utility model, but are not used for limiting scope of the present utility model.
As shown in Figure 1, miniature circuit breaker electromagnetic trip of the present utility model, comprise yoke 1, coil 2, reaction spring 3, static iron core 4, dynamic iron core 5 and push rod 6, the inside of yoke is provided with placed cavity, front side and the rear side of yoke are respectively arranged with through hole, static iron core is positioned at placed cavity, and the edge of static iron core is fixed on the through hole on rear side of yoke by fixed axis, dynamic iron core is positioned at placed cavity, and the through hole be positioned on front side of yoke, dynamic iron core is positioned on fixed axis, and can self-retaining axle laterally slide; Reaction spring is sleeved on the outside of fixed axis, and one end of reaction spring contacts with static iron core, and the other end contacts with dynamic iron core; Coil is positioned at the placed cavity of yoke, and coil is positioned at the outside of dynamic iron core and static iron core; Push rod and dynamic iron core are installed together; By above-mentioned setting, more reliable result of use can be reached.
Miniature circuit breaker electromagnetic trip of the present utility model, the rear side of static iron core is provided with collar, static iron core is fixed on the through hole on rear side of yoke by collar, and the inside of static iron core is provided with rear perforation, the rear side of dynamic iron core is provided with front perforation, and fixed axis passes rear perforation from back to front and stretches in front perforation.
Miniature circuit breaker electromagnetic trip of the present utility model, collar and static iron core are structure as a whole.
Miniature circuit breaker electromagnetic trip of the present utility model, its know-why is as follows:
Electromagnetic tripping system, as the transient protection workpiece of MCB, is a kind of current mode electromagnet.Its structure is type, and the suction of electromagnet is:
F＝3.2(in)
2S/
F-electromagnet core pole-face suction in formula
I-excitation effective current
For current coil, IN is magnetomotive force.When IN is not enough, magnetic flux φ (φ=BS) is just little.Due to IN=φ Rm, Rm is magnetic resistance, is the magnetic resistance of magnetic conductor (iron core) and the magnetic resistance sum of fixed core working gas gap.The magnetic resistance Rm=L/ μ S of magnetic conductor, wherein L is iron circuit length, and S is area of core section, and μ is magnetic permeability unshakable in one's determination.Because μ value is more much larger than the magnetic permeability μ in air, the magnetic resistance of magnetic conductor is very little, therefore Rm is based on the air-gap reluctance between iron core.When Rm mono-timing, φ value is directly proportional to IN.Magnetic resistance Rm=8/ μ S in air gap, when the size of iron core is fixed, 8 is constant, then 8 is large, and Rm is just large.Keep fixed φ, φ=IN/Rm, when coil turn one timing, Rm is just large, then iron core need increase exciting current I.Otherwise iron core is adhesive, 8=0, now Rm is minimum, and in IN, exciting current I is minimum.If electromagnet is closed, because pole-face unshakable in one's determination is very not smooth, or have dust and steam to be attached to pole-face, electromagnet is just in and does not hold state completely, produces noise next time in the reaction spring effect of iron core because of shake.
Reaction spring is the important original paper of electromagnet, has had reaction spring, just can discharge when suction is less than spring force, when suction is greater than spring, and fixed core and dynamic iron core adhesive.For the electromagnetic system of MCB, running current even quite multiple electric current time (the overcurrent multiple of permission) can not electromagnetic actuation be made, namely magnetomotive force IN value is not enough to overcome the counter-force of spring and fixed core and dynamic iron core is in the open position.When MCB flow through comparatively major break down electric current time (exceeding the overcurrent multiple of permission), now magnetomotive force IN surges, the magnetic flux density produced becomes very large, suction F increases, overcome the counter-force of spring, dynamic iron core is held by fixed core, and drives push rod to make, hit release lever, MCB is disconnected rapidly.
The above is only preferred implementation of the present utility model; should be understood that; for those skilled in the art; under the prerequisite not departing from the utility model know-why; can also make some improvement and modification, these improve and modification also should be considered as protection range of the present utility model.
Claims (3)
1. a miniature circuit breaker electromagnetic trip, it is characterized in that, comprise yoke, coil, reaction spring, static iron core, dynamic iron core and push rod, the inside of described yoke is provided with placed cavity, front side and the rear side of described yoke are respectively arranged with through hole, described static iron core is positioned at placed cavity, and the edge of static iron core is fixed on the through hole on rear side of yoke by fixed axis, described dynamic iron core is positioned at placed cavity, and the through hole be positioned on front side of yoke, described dynamic iron core is positioned on fixed axis, and can self-retaining axle laterally slide; Described reaction spring is sleeved on the outside of fixed axis, and one end of reaction spring contacts with static iron core, and the other end contacts with dynamic iron core; Described coil is positioned at the placed cavity of yoke, and coil is positioned at the outside of dynamic iron core and static iron core; Described push rod and dynamic iron core are installed together.
2. miniature circuit breaker electromagnetic trip as claimed in claim 1, it is characterized in that, the rear side of described static iron core is provided with collar, described static iron core is fixed on the through hole on rear side of yoke by collar, and the inside of described static iron core is provided with rear perforation, the rear side of described dynamic iron core is provided with front perforation, and described fixed axis passes rear perforation from back to front and stretches in front perforation.
3. miniature circuit breaker electromagnetic trip as claimed in claim 2, it is characterized in that, described collar and static iron core are structure as a whole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520975503.0U CN205159250U (en) | 2015-12-01 | 2015-12-01 | Miniature circuit breaker electromagnetism is threaded off |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520975503.0U CN205159250U (en) | 2015-12-01 | 2015-12-01 | Miniature circuit breaker electromagnetism is threaded off |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205159250U true CN205159250U (en) | 2016-04-13 |
Family
ID=55694914
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520975503.0U Expired - Fee Related CN205159250U (en) | 2015-12-01 | 2015-12-01 | Miniature circuit breaker electromagnetism is threaded off |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205159250U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106206195A (en) * | 2016-08-31 | 2016-12-07 | 厦门宏发开关设备有限公司 | Electromagnetic tripping apparatus and electro-magnetic circuit breaker |
| CN107393775A (en) * | 2017-08-16 | 2017-11-24 | 芜湖市凯鑫避雷器有限责任公司 | A kind of release electromagnet device of low-voltage electrical apparatus |
-
2015
- 2015-12-01 CN CN201520975503.0U patent/CN205159250U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106206195A (en) * | 2016-08-31 | 2016-12-07 | 厦门宏发开关设备有限公司 | Electromagnetic tripping apparatus and electro-magnetic circuit breaker |
| CN106206195B (en) * | 2016-08-31 | 2020-09-01 | 厦门宏发开关设备有限公司 | Electromagnetic tripping device and electromagnetic circuit breaker |
| CN107393775A (en) * | 2017-08-16 | 2017-11-24 | 芜湖市凯鑫避雷器有限责任公司 | A kind of release electromagnet device of low-voltage electrical apparatus |
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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: 20160413 Termination date: 20171201 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |