CN109427514B - Thermal trip structure for motor starter - Google Patents
Thermal trip structure for motor starter Download PDFInfo
- Publication number
- CN109427514B CN109427514B CN201710721011.2A CN201710721011A CN109427514B CN 109427514 B CN109427514 B CN 109427514B CN 201710721011 A CN201710721011 A CN 201710721011A CN 109427514 B CN109427514 B CN 109427514B
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- plate
- electric heating
- heating material
- contact
- contact plate
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- 239000007858 starting material Substances 0.000 title claims abstract description 31
- 239000000463 material Substances 0.000 claims abstract description 91
- 238000005485 electric heating Methods 0.000 claims abstract description 79
- 238000003466 welding Methods 0.000 claims abstract description 63
- 230000003068 static effect Effects 0.000 claims abstract description 7
- 238000005452 bending Methods 0.000 claims description 17
- 238000009434 installation Methods 0.000 claims description 15
- 239000004020 conductor Substances 0.000 claims description 8
- 239000002184 metal Substances 0.000 claims description 8
- 229910052751 metal Inorganic materials 0.000 claims description 8
- 230000002411 adverse Effects 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 3
- 230000007246 mechanism Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/12—Automatic release mechanisms with or without manual release
- H01H71/14—Electrothermal mechanisms
- H01H71/16—Electrothermal mechanisms with bimetal element
- H01H71/164—Heating elements
Landscapes
- Breakers (AREA)
- Thermally Actuated Switches (AREA)
Abstract
A motor starter thermal trip structure comprises a bracket, a fixed contact, a contact plate, a bimetallic strip and an electric heating material, wherein the fixed contact, the contact plate, the bimetallic strip and the electric heating material are arranged on the bracket; an electromagnetic coil is arranged on one side of the thermal trip structure, the fixed contact is arranged below the bracket, the contact plate and the electric heating material are arranged above the bracket, and the bimetallic strip is arranged on the contact plate and connected with the contact plate; one end of the static contact is connected with one end of the electric heating material, the other end of the electric heating material is connected with one end of the contact plate, and the other end of the contact plate is connected with the electromagnetic coil. The invention relates to a motor starter thermal trip structure, wherein two ends of an electric heating material are respectively connected with a fixed contact and a contact plate, and after the structure is improved, the current flow path of the thermal trip structure is as follows: the electric current does not flow through the welding part of the bimetallic strip and the contact plate when the thermal trip device works, adverse effects caused by fluctuation of the resistance value of the part are avoided, and the trip of the product is more stable and reliable.
Description
Technical Field
The invention relates to the field of piezoelectric devices, in particular to a thermal trip structure of a motor starter.
Background
Motor starters (hereinafter referred to as "starter") are used for infrequent starting and overload protection (three-phase balanced load and unbalanced load, and having a temperature compensation function) of motors, and for short-circuit protection. Typically including thermal magnetic trips, operating mechanisms, contact systems, arc extinguishing systems, set current adjusting devices, temperature compensating devices, differential protection devices, insulating housings, and the like. The starter is manually operated and starts or stops the motor when the main circuit is closed or opened.
If the motor is overloaded, the current flowing through the thermal trip device of the starter is increased, the temperature of the bimetallic strip in the thermal trip device is increased after the bimetallic strip is heated, and the bimetallic strip can bend and drive the mechanism to trip; if short-circuit current is encountered, the magnetic release generates a stronger magnetic field, and the electromagnetic force enables the iron core of the magnetic release to rapidly move so as to drive the mechanism to release. When the two tripping actions are performed, the operating mechanism drives the moving contact and the fixed contact to be separated, the arc extinguishing system extinguishes the arc between the contacts, and finally, a circuit is disconnected, so that the purpose of protecting the motor is achieved.
The electrothermal material of the existing thermal trip is welded between a fixed contact and a bimetallic strip, and the current flowing path of the thermal trip is as follows: stationary contact, electrothermal material, bimetallic strip, contact plate, coil and wiring board. Wherein the bimetallic strip and the contact plate adopt a laser welding process. Laser welding has lower melting and more disperse parts to be welded than resistance welding. The resistance values at the different thermal trip welds are subject to fluctuations due to the fluctuating metal weld melts. The heat generated by the current flowing through the heat-absorbing device is greatly affected by the heat during operation, and finally, the bending amounts of the double-gold of the 3 heat-absorbing devices of the same product are inconsistent during 3-phase balanced load, so that the accuracy of the protection characteristics of the product is reduced.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide the thermal trip structure of the motor starter, which has the advantages of simple and compact structure, safe and reliable performance and simple and quick processing.
In order to achieve the above purpose, the invention adopts the following technical scheme:
The motor starter thermal trip structure comprises a bracket 1, a fixed contact 3, a contact plate 5, a bimetallic strip 6 and an electric heating material 2 which are arranged on the bracket 1; one side of the thermal trip structure is also provided with an electromagnetic coil 4, the fixed contact 3 is arranged below the bracket 1, the contact plate 5 and the electrothermal material 2 are arranged above the bracket 1, and the bimetallic strip 6 is arranged on the contact plate 5 and connected with the contact plate 5; one end of the fixed contact 3 is connected with one end of the electric heating material 2, the other end of the electric heating material 2 is connected with one end of the contact plate 5, and the other end of the contact plate 5 is connected with the electromagnetic coil 4.
Further, the fixed contact 3 and the contact plate 5 are installed on two sides of the support 1 in parallel, the bimetallic strip 6 is vertically connected to one end of the upper surface of the contact plate 5, the electric heating material 2 and the bimetallic strip 6 are arranged in parallel, and the electromagnetic coil 4 is located on one side of the bimetallic strip 6.
Further, one end of the electrothermal material 2 is welded and fixed with the fixed contact 3, and the other end of the electrothermal material 2 is welded and fixed with the contact plate 5.
Further, the electric heating material 2 is a double-layer sheet structure formed by folding a metal strip, and comprises a first electric heating material plate 21 and a second electric heating material plate 22, wherein the upper ends of the first electric heating material plate 21 and the second electric heating material plate 22 are connected, the lower end of the first electric heating material plate 21 is bent and extended to one side to be provided with a first welding end 211 welded with the fixed contact 3, and the lower end of the second electric heating material plate 22 is bent and extended downwards to be provided with a second welding end 221 welded with the contact plate 5.
Further, the first welding end 211 includes an arc-shaped bending portion 211a, a triangular folding portion 211b connected to the arc-shaped bending portion 211a, and a first welding piece 211c formed by bending one side of the triangular folding portion 211b and welded to the fixed contact 3, wherein the first welding end 211 is formed by bending a lower end of the first electric heating material plate 21 upward and outward and then folding the lower end outward along oblique lines to form the arc-shaped bending portion 211a and the triangular folding portion 211b, and an end portion of the triangular folding portion 211b is vertically bent outward to form the first welding piece 211c.
Further, the second welding end 221 includes an arc-shaped turning section 221a and an L-shaped section connected to the arc-shaped turning section 221a, the L-shaped section includes a vertical section 221b connected to the arc-shaped turning section 221a and a second welding piece 221c vertically connected to the other end of the vertical section 221b, the vertical section 221b is parallel to the second electric heating material plate 22, and the second welding piece 221c is bent right under the second electric heating material plate 22; the lower end of the second electric heating material plate 22 is bent outward to form an arc-shaped turning section 221a, bent downward to form a vertical section 221b, and then bent right below the second electric heating material plate 22 to form a second welding piece 221c welded with the contact plate 5.
Further, the stationary contact 3 includes contact plate 31 and the connecting plate 32 of perpendicular connection in contact plate 31 one end, contact plate 31 includes contact plate 311 and installation fixed plate 312 that are parallel to each other dislocation set, through slant connecting plate 313 between contact plate 311 and the installation fixed plate 312, the stationary contact is installed to the below of contact plate 311, the tip of installation fixed plate 312 is equipped with the fixed extension board 312a with the bottom installation complex of support 1, the fixed mounting groove with fixed extension board 312a installation complex is located to the bottom of support 1, the tip of connecting plate 32 is equipped with the welded welding piece 321 with the first welding piece 211c of electric heat material 2, connecting plate 32 bulge to both sides is equipped with connecting lug 322, the middle part of connecting lug 322 is equipped with connecting groove 323, the lateral wall of support 1 is equipped with the connecting lug with connecting groove 323 installation complex.
Further, one end of the upper surface of the contact plate 5 is welded with the bimetallic strip 6, one side of the other end is cut and bent upwards to form a welding column 51 welded with the electromagnetic coil 4, and the welding column 51 is perpendicular to the contact plate 5; the contact plate 5 is provided on both sides with mounting square grooves 52 mounted with the bracket 1.
Further, an insulating plate 81 is arranged between the bimetal 6 and the electric heating material 2, and the bimetal 6, the electric heating material 2 and the insulating plate 81 are tightly attached to each other and then are sleeved with an annular fixing piece 82.
Further, the other end of the electrothermal material 2 is connected with a flexible conductor, and the flexible conductor is connected with a contact plate 5.
The invention relates to a motor starter thermal trip structure, wherein two ends of an electric heating material are respectively connected with a fixed contact and a contact plate, and after the structure is improved, the current flow path of the thermal trip structure is as follows: the improved structure current does not flow through the bimetallic strip, the bimetallic strip is heated by the electric heating material, and the current does not flow through the welding part of the bimetallic strip and the contact plate when the thermal trip device works, so that adverse effects caused by fluctuation of the resistance value of the part are avoided, and the trip of the product is more stable and reliable. The contact plate of the invention has the function of fixing the bimetallic strip and the contact plate. Obviously, the other end of the electric heating material is connected with the soft conductor, and is connected with the contact plate through the soft conductor. The electrothermal material, the fixed contact and the contact plate can be welded. The whole electric heating material is of a double-layer sheet structure formed by folding a whole metal sheet, the processing technology is simple, the two ends of the electric heating material are welded and fixed with the fixed contact and the contact plate respectively through the first welding end and the second welding end, and the structure is stable and reliable.
Drawings
FIG. 1 is a schematic illustration of the motor starter thermal trip structure of the present invention;
FIG. 2 is a schematic view of another orientation of the motor starter thermal trip structure of the present invention;
FIG. 3 is an exploded view of the motor starter thermal trip structure of the present invention;
fig. 4 is a view showing an installation structure of the contact plate and the bimetal according to the present invention;
FIG. 5 is a block diagram of an electrocaloric material of the present invention;
Fig. 6 is a structural view of the stationary contact of the present invention.
Detailed Description
Embodiments of the motor starter thermal trip structure of the present invention are further described below with reference to the examples shown in fig. 1-6. The motor starter thermal trip structure of the present invention is not limited to the description of the following embodiments.
As shown in fig. 1-2, the motor starter thermal trip structure of the present invention comprises a bracket 1, a stationary contact 3, a contact plate 5, a bimetal 6 and an electric heating material 2 which are mounted on the bracket 1. One side of the release structure is also provided with an electromagnetic coil 4, the fixed contact 3 is arranged below the support 1, the contact plate 5 and the electrothermal material 2 are arranged above the support 1, and the bimetallic strip 6 is arranged on the contact plate 5 and connected with the contact plate 5. The static contact 3 and the contact plate 5 are arranged on two sides of the bracket 1 in parallel, the bimetallic strip 6 is vertically connected to one end of the upper surface of the contact plate 5, the electric heating material 2 and the bimetallic strip 6 are arranged in parallel, and the electromagnetic coil 4 is positioned on one side of the bimetallic strip 6. A wiring terminal is also arranged on one side of the electromagnetic coil 4, and a wiring board of the wiring terminal is connected with the electromagnetic coil 4. The whole structure of the thermal trip device of the engine starter is simple and compact.
As shown in fig. 1-2, in the structure of the motor starter thermal trip of the present invention, one end of the static contact 3 is connected with one end of the electric heating material 2, the other end of the electric heating material 2 is connected with one end of the contact plate 5, and the other end of the contact plate 5 is connected with the electromagnetic coil 4. The connection is welded. The invention relates to a motor starter thermal trip structure, wherein two ends of an electric heating material are respectively connected with a fixed contact and a contact plate, and after the structure is improved, the current flow path of the thermal trip structure is as follows: the improved structure current does not flow through the bimetallic strip, the bimetallic strip is heated by the electric heating material, and the current does not flow through the welding part of the bimetallic strip and the contact plate when the thermal trip device works, so that adverse effects caused by fluctuation of resistance values of the part are avoided, and the trip of the product is more stable and reliable.
As shown in fig. 2, specifically, one end of the electric heating material 2 and one end of the stationary contact 3 are welded at B, and the other end of the electric heating material 2 and the contact plate 5 are welded at D. The contact plate of the invention has the function of fixing the bimetallic strip and the contact plate. Obviously, the other end of the electric heating material 2 is connected with a flexible conductor, and is connected with the contact plate 5 through the flexible conductor. The electrothermal material 2, the fixed contact and the contact plate 5 can also be welded.
As shown in fig. 5, the electric heating material 2 is a double-layer sheet structure formed by folding a metal strip, and includes a first electric heating material plate 21 and a second electric heating material plate 22, the upper ends of the first electric heating material plate 21 and the second electric heating material plate 22 are connected, a first welding end 211 welded with the stationary contact 3 is bent and extended to one side at the lower end of the first electric heating material plate 21, and a second welding end 221 welded with the contact plate 5 is bent and extended to the lower end of the second electric heating material plate 22. The whole electric heating material 2 is of a double-layer sheet structure formed by folding a whole metal sheet, the processing technology is simple, two ends of the electric heating material are welded and fixed with the fixed contact 3 and the contact plate 5 respectively through the first welding end 211 and the second welding end 221, and the structure is stable and reliable.
Specifically, as shown in fig. 5, the first welding end 211 includes an arc-shaped bending portion 211a, a triangular folding portion 211b connected to the arc-shaped bending portion 211a, and a first welding piece 211c formed by bending the side of the triangular folding portion 211b and welded to the fixed contact 3, wherein the first welding end 211 is formed by bending the lower end of the first electric heating material plate 21 upward and outward and then folding the lower end outward along oblique lines to form the arc-shaped bending portion 211a and the triangular folding portion 211b, and the end of the triangular folding portion 211b is vertically bent outward to form the first welding piece 211c. The first welding end 211 is provided with an arc-shaped bending part 211a, so that the elasticity of the first welding end 211 is improved, the welding is convenient, and the breakage is prevented. The first welding end 211 is formed by folding the whole metal sheet into a triangular folding part 211b and a first welding piece 211c for welding, and the integral structure is more stable.
As shown in fig. 5, the second welding end 221 includes an arc-shaped turning section 221a and an L-shaped section connected to the arc-shaped turning section 221a, the L-shaped section includes a vertical section 221b connected to the arc-shaped turning section 221a and a second welding piece 221c vertically connected to the other end of the vertical section 221b, the vertical section 221b is parallel to the second electric heating material plate 22, and the second welding piece 221c is bent right under the second electric heating material plate 22; the lower end of the second electric heating material plate 22 is bent outward to form an arc-shaped turning section 221a, bent downward to form a vertical section 221b, and then bent right below the second electric heating material plate 22 to form a second welding piece 221c welded with the contact plate 5. The first welding end 211 is provided with an arc-shaped turning section 221a, so that the elasticity of the second welding end 221 is improved, the welding is convenient, and the breakage is prevented. The second welding end 221 is formed by folding the whole metal sheet into an L-shaped section, and the second welding piece 221c of the L-shaped section is used for welding, so that the integral structure is more stable.
In particular, an insulating plate 81 is arranged between the bimetallic strip 6 and the electric heating material 2, and the bimetallic strip 6, the electric heating material 2 and the insulating plate 81 are tightly attached to each other and then are sleeved with an annular fixing piece 82.
As shown in fig. 3, the stationary contact 3 includes a contact plate 31 and a connecting plate 32 vertically connected to one end of the contact plate 31, the contact plate 31 includes a contact plate 311 and a mounting fixing plate 312, which are parallel and staggered, the contact plate 311 and the mounting fixing plate 312 are connected with each other by an oblique connecting plate 313, a stationary contact is installed below the contact plate 311, a fixing extension plate 312a matched with the bottom of the bracket 1 is installed at the end of the mounting fixing plate 312, a fixing installation groove matched with the fixing extension plate 312a is provided at the bottom of the bracket 1, and the fixing extension plate 312a is fixedly installed with the fixing installation groove on the lower surface of the bracket 1, so that the structure is stable and the assembly is convenient. The tip of connecting plate 32 is equipped with the welded block 321 with the first welding piece 211c welded of electric heat material 2, and connecting plate 32 bulge to both sides is equipped with connection lug 322, and the middle part of connection lug 322 is equipped with connection groove 323, and support 1's lateral wall is equipped with the connection protruding with connection groove 323 installation complex, and connection groove 232 and support 1's connection protruding cooperation installation, stable in structure is reliable. The contact plate 31 and the connecting plate 32 of the fixed contact 3 are provided with corresponding mounting structures, and the mounting structure of the fixed contact is stable and reliable.
As shown in fig. 5, one end of the upper surface of the contact plate 5 is welded with the bimetallic strip 6, and one side of the other end is cut and bent upwards to form a welding post 51 welded with the electromagnetic coil 4, and the welding post 51 is perpendicular to the contact plate 5; the both sides of contact plate 5 are equipped with the installation square groove 52 of installing with support 1, and contact plate 5 passes through installation square groove 52 and support 1 installation cooperation, and the structure is firm.
The foregoing is a further detailed description of the invention in connection with the preferred embodiments, and it is not intended that the invention be limited to the specific embodiments described. It will be apparent to those skilled in the art that several simple deductions or substitutions may be made without departing from the spirit of the invention, and these should be considered to be within the scope of the invention.
Claims (10)
1. A motor starter thermal trip structure characterized by: comprises a bracket (1), a fixed contact (3), a contact plate (5), a bimetallic strip (6) and an electric heating material (2) which are arranged on the bracket (1); an electromagnetic coil (4) is arranged on one side of the thermal trip structure, the fixed contact (3) is arranged below the bracket (1), the contact plate (5) and the electric heating material (2) are arranged above the bracket (1), and the bimetallic strip (6) is arranged on the contact plate (5) and connected with the contact plate (5);
One end of the static contact (3) is connected with one end of the electric heating material (2), the other end of the electric heating material (2) is connected with one end of the contact plate (5), the other end of the contact plate (5) is connected with the electromagnetic coil (4), an insulating plate (81) is arranged between the bimetallic strip (6) and the electric heating material (2), and the bimetallic strip (6), the electric heating material (2) and the insulating plate (81) are tightly attached to each other.
2. The motor starter thermal trip structure of claim 1, wherein: the static contact (3) and the contact plate (5) are arranged on two sides of the support (1) in parallel, the bimetallic strip (6) is vertically connected to one end of the upper surface of the contact plate (5), the electric heating material (2) and the bimetallic strip (6) are arranged in parallel, and the electromagnetic coil (4) is located on one side of the bimetallic strip (6).
3. The motor starter thermal trip structure according to claim 1 or 2, characterized in that: one end of the electric heating material (2) is welded and fixed with the fixed contact (3), and the other end of the electric heating material (2) is welded and fixed with the contact plate (5).
4. The motor starter thermal trip structure according to claim 1 or 2, characterized in that: the electric heating material (2) is of a double-layer sheet structure formed by folding a metal strip, and comprises a first electric heating material plate (21) and a second electric heating material plate (22), wherein the upper ends of the first electric heating material plate (21) and the second electric heating material plate (22) are connected, the lower end of the first electric heating material plate (21) is bent and extended to one side and provided with a first welding end (211) welded with the fixed contact (3), and the lower end of the second electric heating material plate (22) is bent and extended downwards and provided with a second welding end (221) welded with the contact plate (5).
5. The motor starter thermal trip structure according to claim 4, wherein: the first welding end (211) comprises an arc-shaped bending part (211 a), a triangular folding part (211 b) connected with the arc-shaped bending part (211 a) and a first welding sheet (211 c) formed by bending one side of the triangular folding part (211 b) and welded with the fixed contact (3), the first welding end (211) is formed by bending the lower end of the first electric heating material plate (21) outwards and upwards and then outwards folding the lower end of the first electric heating material plate outwards along oblique lines in a doubling mode to form the arc-shaped bending part (211 a) and the triangular folding part (211 b), and the end part of the triangular folding part (211 b) is perpendicularly bent outwards to form the first welding sheet (211 c).
6. The motor starter thermal trip structure according to claim 4, wherein: the second welding end (221) comprises an arc turning section (221 a) and an L-shaped section connected with the arc turning section (221 a), the L-shaped section comprises a vertical section (221 b) connected with the arc turning section (221 a) and a second welding sheet (221 c) vertically connected with the other end of the vertical section (221 b), the vertical section (221 b) is parallel to the second electric heating material plate (22), and the second welding sheet (221 c) is bent right below the second electric heating material plate (22); the lower end of the second electric heating material plate (22) is bent outwards to form an arc-shaped turning section (221 a), is bent downwards to form a vertical section (221 b), and is bent right below the second electric heating material plate (22) to form a second welding sheet (221 c) welded with the contact plate (5).
7. The motor starter thermal trip structure according to claim 1 or 2, characterized in that: the static contact (3) comprises a contact plate (31) and a connecting plate (32) vertically connected to one end of the contact plate (31), the contact plate (31) comprises a contact plate (311) and a mounting fixing plate (312) which are arranged in parallel and staggered, a static contact is mounted between the contact plate (311) and the mounting fixing plate (312) through an oblique connecting plate (313), a fixed extension plate (312 a) which is mounted and matched with the bottom of the support (1) is arranged at the end of the mounting fixing plate (312), a fixed mounting groove which is mounted and matched with the fixed extension plate (312 a) is formed in the bottom of the support (1), a welding block (321) which is welded with a first welding piece (211 c) of the electric heating material (2) is arranged at the end of the connecting plate (32), a connecting lug (322) is arranged on the two sides in a protruding mode, a connecting groove (323) is formed in the middle of the connecting lug (322), and a connecting protrusion which is mounted and matched with the connecting groove (323) is formed in the side wall of the support (1).
8. The motor starter thermal trip structure according to claim 1 or 2, characterized in that: one end of the upper surface of the contact plate (5) is welded with the bimetallic strip (6), one side of the other end is cut and bent upwards to form a welding column (51) welded with the electromagnetic coil (4), and the welding column (51) is perpendicular to the contact plate (5); both sides of the contact plate (5) are provided with square installation grooves (52) which are installed with the bracket (1).
9. The motor starter thermal trip structure according to claim 1 or 2, characterized in that: the bimetal (6), the electric heating material (2) and the insulating plate (81) are tightly attached and then are sleeved with the annular fixing piece (82) outside.
10. The motor starter thermal trip structure according to claim 1 or 2, characterized in that: the other end of the electric heating material (2) is connected with a soft conductor, and the soft conductor is connected with a contact plate (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710721011.2A CN109427514B (en) | 2017-08-21 | 2017-08-21 | Thermal trip structure for motor starter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710721011.2A CN109427514B (en) | 2017-08-21 | 2017-08-21 | Thermal trip structure for motor starter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109427514A CN109427514A (en) | 2019-03-05 |
| CN109427514B true CN109427514B (en) | 2024-04-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710721011.2A Active CN109427514B (en) | 2017-08-21 | 2017-08-21 | Thermal trip structure for motor starter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109427514B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES441967A1 (en) * | 1975-10-21 | 1977-04-01 | Saez Herrero Enrique | Improvements in power limiting devices with automatic reset. (Machine-translation by Google Translate, not legally binding) |
| CN86105712A (en) * | 1985-07-31 | 1987-04-08 | 默林·格伦 | The switchette of band multiple moving contacts and thermo magnetic trip release |
| CN201194207Y (en) * | 2008-03-24 | 2009-02-11 | 李峰 | Improved circuit breaker |
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| CN207303012U (en) * | 2017-08-21 | 2018-05-01 | 浙江正泰电器股份有限公司 | Motor starter thermal trip structure |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9048048B2 (en) * | 2012-08-16 | 2015-06-02 | Uchiya Thermostat Co., Ltd. | Thermal protector |
| CN103269000B (en) * | 2013-04-28 | 2015-10-21 | 温州市万盛电器有限公司 | There is the improved earth leakage protection socket of backing protection function |
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- 2017-08-21 CN CN201710721011.2A patent/CN109427514B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES441967A1 (en) * | 1975-10-21 | 1977-04-01 | Saez Herrero Enrique | Improvements in power limiting devices with automatic reset. (Machine-translation by Google Translate, not legally binding) |
| CN86105712A (en) * | 1985-07-31 | 1987-04-08 | 默林·格伦 | The switchette of band multiple moving contacts and thermo magnetic trip release |
| CN201194207Y (en) * | 2008-03-24 | 2009-02-11 | 李峰 | Improved circuit breaker |
| CN204651275U (en) * | 2015-06-17 | 2015-09-16 | 浙江人民电器有限公司 | A kind of miniature circuit breaker |
| CN206022268U (en) * | 2016-08-16 | 2017-03-15 | 浙江正泰电器股份有限公司 | Breaker |
| CN207303012U (en) * | 2017-08-21 | 2018-05-01 | 浙江正泰电器股份有限公司 | Motor starter thermal trip structure |
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| Title |
|---|
| 断路器过电流保护脱扣器的设计研究;顾惠民;;电器与能效管理技术(02);17-23 * |
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| Publication number | Publication date |
|---|---|
| CN109427514A (en) | 2019-03-05 |
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