CN210607147U - Circuit breaker and electromagnetic tripping device thereof - Google Patents
Circuit breaker and electromagnetic tripping device thereof Download PDFInfo
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- CN210607147U CN210607147U CN201921325489.4U CN201921325489U CN210607147U CN 210607147 U CN210607147 U CN 210607147U CN 201921325489 U CN201921325489 U CN 201921325489U CN 210607147 U CN210607147 U CN 210607147U
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Abstract
The utility model relates to a circuit breaker and electromagnetic tripping device thereof the utility model discloses an among the electromagnetic tripping device, owing to cover in the shell outside of electromagnetic tripping device and be equipped with the shield cover, the shield cover has inside and outside two-layer housing moreover, and wherein the material of inner housing by high conductivity is made, can play good shielding effect to the electric field, and outer housing is made by high magnetic conductivity's material, can play good shielding effect to magnetic field. Therefore, the utility model discloses an electromagnetic tripping device can enough shield the electric field well, can also shield the magnetic field well, and protection level is higher.
Description
Technical Field
The utility model relates to a circuit breaker and electromagnetic trip device thereof, in particular to circuit breaker and electromagnetic trip device thereof that is applied to electric leakage series and protection release field among low-voltage circuit breaker.
Background
The electromagnetic tripping device on the market at present mostly has no shielding protection outside or insufficient protection strength, and the influence of an external strong magnetic field causes great disadvantages to a permanent magnet inside the tripper, thereby causing the consequences of increasing or losing magnetism, changing the performance of the tripper and causing the abnormal condition of locking or misoperation.
The electromagnetic shielding cover effectively suppresses the influence, so that the interference field forms a vortex in the shielding cover and generates reflection on an interface between the shielding cover and a protected space, thereby greatly weakening the field intensity value of the interference field in the protected space and achieving the shielding effect.
SUMMERY OF THE UTILITY MODEL
In view of the above, the technical problem to be solved by the present invention is to provide a circuit breaker and an electromagnetic trip device thereof, which can effectively shield an electric field and a magnetic field.
Under the normal state, the electromagnetic release is actuated by the armature under the action of the suction force generated by the internal magnetic steel, and the ejector rod is in a free state; when the leakage series circuit breaker detects that the leakage current exceeds the set leakage current or the set power frequency small current appears in the protection release, a reverse electromagnetic force is generated in a coil in the electromagnetic release to overcome the suction force of a part of electromagnetic steel, so that the reaction electromagnetic force plus the spring force is larger than the magnetic steel suction force, the armature is released, the action ejector rod of the electromagnetic release is popped up, and then the opening and closing mechanism of the circuit breaker is released to play a role in protection.
In order to achieve the purpose, the utility model provides an electromagnetic tripping device, which comprises a shell and a mandril, wherein the mandril extends out of the front end surface of the shell, and the mandril is driven by an electromagnetic coil arranged in the shell to stretch and contract;
the outer side of the shell is also sleeved with a shielding cover, the front end of the shielding cover is provided with an opening, and the front end face of the shell is exposed out of the opening at the front end of the shielding cover; the shielding case comprises an inner layer case and an outer layer case, wherein the outer layer case is made of a high-conductivity material, and the inner layer case is made of a high-conductivity material.
Preferably, the upper side and the lower side of the front end of the shell are respectively provided with a first pair of connecting lugs and a second pair of connecting lugs, the first pair of connecting lugs are coaxially provided with a first pair of connecting holes, and the second pair of connecting lugs are coaxially provided with a second pair of connecting holes;
the shielding cover is provided with a first pair of U-shaped grooves and a second pair of U-shaped grooves, the first pair of connecting holes are exposed out of the first pair of U-shaped grooves, and the second pair of connecting holes are exposed out of the second pair of U-shaped grooves.
Preferably, the axes of the first pair of connecting holes and the second pair of connecting holes extend in the left-right direction.
Preferably, the rear end of the shielding case is provided with a wire outlet hole, and a lead of the electromagnetic coil is led out from the wire outlet hole.
More preferably, the outlet hole is also used for leading out a signal wire.
Preferably, the inner shell of the shielding case is made of a ferrous material, and the outer shell of the shielding case is made of a copper material.
And with the utility model discloses an electromagnetic tripping device correspondingly, the utility model discloses still provide a circuit breaker, including above-mentioned technical scheme or any preferred technical scheme thereof electromagnetic tripping device.
As above, the utility model relates to a circuit breaker and electromagnetism trip gear thereof has following beneficial effect: the utility model discloses an among the electromagnetic tripping device, owing to be equipped with the shield cover at electromagnetic tripping device's the shell outside cover, the shield cover has inside and outside two-layer housing moreover, and outer housing is made by high conductivity material, can play good shielding effect to the electric field, and the inlayer housing is made by high magnetic conductivity material, can play good shielding effect to magnetic field. Therefore, the utility model discloses an electromagnetic tripping device can enough shield the electric field well, can also shield the magnetic field well, and protection level is higher.
Drawings
Fig. 1 shows a schematic structural diagram of an electromagnetic trip device according to the present invention.
Fig. 2 is a schematic structural view of the shield case.
Description of the element reference numerals
1 outer cover
2 ejector pin
3 front end face of the housing
4 shield cover
5 inner layer cover shell
6 outer layer cover
7a connecting lug
7b engaging lug
7c engaging lug
7d connecting lug
8a connecting hole
8b connecting hole
8c connecting hole
8d connecting hole
9a U groove
9b U groove
9c U groove
9d U groove
10 outlet hole
Detailed Description
The following description is provided for illustrative purposes, and other advantages and features of the present invention will become apparent to those skilled in the art from the following detailed description.
It should be understood that the structure, ratio, size and the like shown in the drawings attached to the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by those skilled in the art, and are not used for limiting the limit conditions that the present invention can be implemented, so that the present invention has no technical essential meaning, and any structure modification, ratio relationship change or size adjustment should still fall within the scope that the technical content disclosed in the present invention can cover without affecting the function that the present invention can produce and the purpose that the present invention can achieve. Meanwhile, the terms such as "upper", "lower", "left", "right", "middle", and the like used in the present specification are for the sake of clarity only, and are not intended to limit the scope of the present invention, and changes or adjustments of the relative relationship thereof are also considered to be the scope of the present invention without substantial changes in the technical content.
As shown in fig. 1 and 2, the present invention provides an electromagnetic trip device, which includes a housing 1 and a top rod 2, wherein the top rod 2 extends from a front end surface 3 of the housing, and the top rod 2 is driven by an electromagnetic coil arranged in the housing 1 to extend and retract;
the outer side of the shell 1 is also sleeved with a shielding cover 4, the front end of the shielding cover 4 is provided with an opening, and the front end surface 3 of the shell is exposed out of the opening at the front end of the shielding cover 4; the shielding case 4 comprises an inner layer case 5 and an outer layer case 6, wherein the outer layer case is made of high-conductivity materials, and the inner layer case is made of high-conductivity materials.
The utility model discloses an among the electromagnetic tripping device, owing to cover in the 1 outside of electromagnetic tripping device's shell and be equipped with shield cover 4, shield cover 4 has inside and outside two-layer housing 5, 6 moreover, and outer housing 6 is made by high conductivity material, can play good shielding effect to the electric field, and inner housing 5 is made by high magnetic conductivity material, can play good shielding effect to magnetic field. Therefore, the utility model discloses an electromagnetic tripping device can enough shield the electric field well, can also shield the magnetic field well, and protection level is higher.
The shield cover 4 has functions of absorbing energy (eddy current loss), reflecting energy (electromagnetic wave is reflected at the interface of the shield cover 4) and canceling energy (electromagnetic induction generates a reverse electromagnetic field on the shield layer, which can cancel part of the interfering electromagnetic wave) for both the interfering electromagnetic wave and the internal electromagnetic wave from the outside of the wire, cable, component, circuit or system, etc., so the shield cover 4 has a function of reducing the interference. When the frequency of the interference electromagnetic field is higher, the eddy current generated in the metal material with low resistivity is utilized to form the counteraction effect on the electromagnetic wave, thereby achieving the shielding effect. When the frequency of the interfering electromagnetic wave is low, a material with high magnetic permeability is adopted, so that the magnetic force lines are limited in the shielding case 4 to prevent the magnetic force lines from diffusing to the shielded space.
When the electromagnetic waves reach the surface of the shield 4, reflections of the incident waves occur due to the impedance discontinuity at the interface between the air and the metal. This reflection does not require that the shielding material must have a certain thickness, only a discontinuity at the interface; b. energy that is not reflected off the surface and enters the shield 4 is attenuated by the shielding material as it travels forward in the body. So-called absorption; c. the remaining energy that has not been attenuated within the shield 4, when it passes to another surface of the material, encounters a metal-air impedance discontinuity interface, is reflected again, and returns back into the shield 4. This reflection may be multiple reflections at the interface of the two metals. In summary, the electromagnetic attenuation of the electromagnetic shield 4 is mainly based on the reflection of the electromagnetic wave and the absorption of the electromagnetic wave.
In order to facilitate the installation of the electromagnetic trip device into the circuit breaker housing, as shown in fig. 1, the upper and lower sides of the front end of the housing 1 are respectively provided with a first pair of connection lugs 7a, 7b and a second pair of connection lugs 7c, 7d, the first pair of connection lugs 7a, 7b are coaxially provided with a first pair of connection holes 8a, 8b, and the second pair of connection lugs 7c, 7d are coaxially provided with a second pair of connection holes 8c, 8 d; the shielding case 4 is provided with a first pair of U-shaped grooves 9a, 9b and a second pair of U-shaped grooves 9c, 9d, the first pair of connection holes 8a, 8b are exposed to the first pair of U-shaped grooves 9a, 9b, and the second pair of connection holes 8c, 8d are exposed to the second pair of U-shaped grooves 9c, 9 d. The shell of the circuit breaker is provided with a plurality of connecting columns, and the connecting columns are connected in the first pair of connecting holes 8a and 8b and the second pair of connecting holes 8c and 8d, so that the electromagnetic tripping device is reliably fixed in the circuit breaker, and the electromagnetic tripping device is prevented from moving due to the reaction force when the ejector rod 2 moves. As shown in fig. 1, the axes of the first pair of connection holes 8a, 8b and the second pair of connection holes 8c, 8d extend in the left-right direction, and the connection posts on the circuit breaker case pass through the first pair of U-shaped grooves 9a, 9b and the second pair of U-shaped grooves 9c, 9d from the left and right sides and are inserted into the first pair of connection holes 8a, 8b and the second pair of connection holes 8c, 8d, respectively.
In order to facilitate leading out of a lead of a solenoid coil of the electromagnetic trip device, as shown in fig. 2, a lead outlet 10 is provided at a rear end of the shielding case 4, and the lead of the solenoid coil is led out from the lead outlet 10. The electromagnetic trip device is also provided with a signal wire, and the wire outlet hole 10 is also used for leading out the signal wire.
As shown in fig. 2, the inner shell 5 of the shielding can 4 is made of a ferrous material, and the outer shell 6 of the shielding can 4 is made of a copper material. Therefore, the inner-layer housing 5 made of the ferrous material tightly wraps the electromagnetic tripping device, so that the electromagnetic tripping device can be prevented from being interfered by an external magnetic field, and the output motion of the electromagnetic tripping device is stable. The outer casing 6, which is wrapped outside the inner casing 5, is made of copper material, and can effectively shield electric field vortex generated by charged components in the circuit breaker. The inner housing 5 and the outer housing 6 of the shielding case 4 may be formed by processing a copper material and an iron material, respectively, and then assembling or riveting the processed materials, or may be formed by directly processing the copper material on the outer side of the iron housing, for example, the outer housing 6 may be formed by plating the copper material on the outer side of the iron housing.
And with the utility model discloses an electromagnetic tripping device correspondingly, the utility model discloses still provide a circuit breaker, including above-mentioned technical scheme or any preferred technical scheme thereof electromagnetic tripping device.
Based on the technical scheme of above-mentioned embodiment, the utility model discloses a circuit breaker and electromagnetic tripping device thereof, owing to cover the shield cover 4 that is equipped with two kinds of materials of copper, iron and makes at the outside of electromagnetic tripping device casing, just so can shield external electric field and magnetic field to electromagnetic tripping device's interference effectively for electromagnetic tripping device does not receive the electromagnetic field interference that main circuit produced when passing through high frequency heavy current.
To sum up, the utility model discloses various shortcomings in the prior art have effectively been overcome and high industry value has.
The above embodiments are merely illustrative of the principles and effects of the present invention, and are not to be construed as limiting the invention. It will be apparent to those skilled in the art that modifications and variations can be made to the above-described embodiments without departing from the spirit and scope of the invention, and it is intended that all equivalent modifications and variations be covered by the appended claims without departing from the spirit and scope of the invention.
Claims (7)
1. An electromagnetic tripping device is characterized by comprising a shell and a mandril, wherein the mandril extends out of the front end surface of the shell and is driven by an electromagnetic coil arranged in the shell to stretch;
the outer side of the shell is also sleeved with a shielding cover, the front end of the shielding cover is provided with an opening, and the front end face of the shell is exposed out of the opening at the front end of the shielding cover; the shielding case comprises an inner layer case and an outer layer case, wherein the outer layer case is made of a high-conductivity material, and the inner layer case is made of a high-conductivity material.
2. The electromagnetic trip unit of claim 1, wherein: a first pair of connecting lugs and a second pair of connecting lugs are respectively arranged on the upper side and the lower side of the front end of the shell, a first pair of connecting holes are coaxially arranged on the first pair of connecting lugs, and a second pair of connecting holes are coaxially arranged on the second pair of connecting lugs;
the shielding cover is provided with a first pair of U-shaped grooves and a second pair of U-shaped grooves, the first pair of connecting holes are exposed out of the first pair of U-shaped grooves, and the second pair of connecting holes are exposed out of the second pair of U-shaped grooves.
3. The electromagnetic trip unit of claim 2, wherein: the axes of the first pair of connecting holes and the second pair of connecting holes extend along the left-right direction.
4. The electromagnetic trip unit of claim 1, wherein: and a wire outlet hole is formed in the rear end of the shielding cover, and a lead of the electromagnetic coil is led out from the wire outlet hole.
5. The electromagnetic trip unit of claim 4, wherein: the wire outlet hole is also used for leading out a signal wire.
6. The electromagnetic trip unit of claim 1, wherein: the inner layer housing of the shielding case is made of a ferrous material, and the outer layer housing of the shielding case is made of a copper material.
7. A circuit breaker, characterized by: comprising an electromagnetic trip device according to any of claims 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921325489.4U CN210607147U (en) | 2019-08-15 | 2019-08-15 | Circuit breaker and electromagnetic tripping device thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921325489.4U CN210607147U (en) | 2019-08-15 | 2019-08-15 | Circuit breaker and electromagnetic tripping device thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210607147U true CN210607147U (en) | 2020-05-22 |
Family
ID=70694780
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921325489.4U Active CN210607147U (en) | 2019-08-15 | 2019-08-15 | Circuit breaker and electromagnetic tripping device thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210607147U (en) |
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2019
- 2019-08-15 CN CN201921325489.4U patent/CN210607147U/en active Active
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