CN106876220B - Thermal overload alarm non-tripping device of circuit breaker - Google Patents
Thermal overload alarm non-tripping device of circuit breaker Download PDFInfo
- Publication number
- CN106876220B CN106876220B CN201510922871.3A CN201510922871A CN106876220B CN 106876220 B CN106876220 B CN 106876220B CN 201510922871 A CN201510922871 A CN 201510922871A CN 106876220 B CN106876220 B CN 106876220B
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- traction rod
- bracket
- circuit breaker
- armature
- alarm
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- 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
- H01H71/04—Means for indicating condition of the switching device
-
- 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
- H01H71/24—Electromagnetic mechanisms
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- Electromagnetism (AREA)
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Abstract
A thermal overload alarm non-tripping device of a circuit breaker comprises a base, a thermomagnetic system arranged in the base, a transmission mechanism and an alarm switch, wherein the transmission mechanism is arranged between the thermomagnetic system and the alarm switch and comprises a bracket and a draw bar horizontally matched with the bracket in a sliding manner, when overload current in the system reaches a set value, the thermomagnetic system drives the draw bar in the transmission mechanism to horizontally move towards a direction departing from the bracket, and the draw bar triggers the alarm switch to output an alarm signal to replace tripping action after moving for a certain distance, so that the occupied space of the circuit breaker in the height direction is effectively reduced, and the thermal overload alarm non-tripping device has the characteristics of compact structure, space saving and low manufacturing cost.
Description
Technical Field
The invention relates to the field of low-voltage electrical appliances, in particular to a circuit breaker, and particularly relates to a thermal overload alarm non-tripping device.
Background
Circuit breakers are an important component of the electrical industry and have found widespread use. When the circuit works normally, the circuit breaker can achieve the functions of power failure, power supply, circuit conversion and the like by closing or opening a circuit for supplying electric energy. When the circuit has faults of overload, voltage loss, undervoltage or short circuit and the like, the circuit breaker can automatically cut off the circuit, so that the safety of workers and the normal operation of equipment are prevented from being endangered due to the circuit faults. When the overload current of a bimetallic strip in a system reaches a setting value, the common thermal release is deformed and bent due to heating, so that the thermal release is released through a transmission mechanism in the circuit breaker to break the circuit breaker, and although the safety of circuit work can be ensured, the system power supply is discontinuous, and adverse effects are brought to production and life.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide the thermal overload alarm non-tripping device of the circuit breaker, which has the advantages of simple structure and high reliability.
In order to achieve the purpose, the invention adopts the following technical scheme:
a thermal overload alarm non-tripping device of a circuit breaker comprises a base 1, a thermomagnetic system 2, a transmission mechanism 3 and an alarm switch 4, wherein the thermomagnetic system 2, the transmission mechanism 3 and the alarm switch 4 are arranged in the base 1, the transmission mechanism 3 is arranged between the thermomagnetic system 2 and the alarm switch 4, the transmission mechanism 3 comprises a bracket 32 and a draw bar 31 in horizontal sliding fit with the bracket 32, when overload current in the system reaches a setting value, the thermomagnetic system 2 drives the draw bar 31 in the transmission mechanism 3 to horizontally move in a direction away from the bracket 32, and the draw bar 31 triggers the alarm switch 4 to output an alarm signal after moving for a certain distance.
Alternatively, the bracket 32 is provided with a horizontally extending guide shaft 321 on the side facing the drawbar 31, a shaft hole 311 is provided on the drawbar 31 to be matched with the guide shaft 321, and the drawbar 31 is supported by inserting the guide shaft 321 into the shaft hole 311 to be matched with the guide shaft 321, while the drawbar 31 is limited to be horizontally and reciprocally slidable only in the direction in which the guide shaft 321 extends.
Optionally, an extension end 31a is provided at one side of the traction rod 31 close to the thermo-magnetic system 2, a driving plate 313 is vertically provided at the other end of the extension end 31a, and the bimetal 21 in the thermo-magnetic system 2 is inserted between the driving plate 313 and the traction rod 31 and is engaged with the driving plate 313.
Optionally, a draw hook 314 extending toward the bracket 32 and folding toward the alarm switch 4 is disposed on a side of the draw bar 31 facing the bracket 32, and after the draw hook 314 moves a certain distance along with the draw bar 31, an inner side of a hook part of the draw hook 314 touches a contact of the alarm switch 4 to close the alarm switch 4.
Optionally, the transmission mechanism 3 includes a return spring 33, two ends of the return spring 33 are respectively connected to the traction rod 31 and the bracket 32, when the thermo-magnetic system 2 drives the traction rod 31 to move away from the bracket 32, the return spring 33 is stretched, and after the thermo-magnetic system 2 releases the action on the traction rod 31, the return spring 33 drives the traction rod 31 to return to the normal working position of the system.
Optionally, the draw bar 31 is in a shape of a bow as a whole, a middle portion of the draw bar is convexly folded in a direction away from the bracket 32 to form a convex folding portion 31b, a first groove 31c is formed on one side of the convex folding portion 31b facing the bracket 32, and two ends of a clamping edge of the first groove 31c are provided with shaft holes 311 facing the bracket 32.
Optionally, a boss 32a which is bent upward is arranged at the middle part of the bracket 32, the guide shaft 321 is arranged on the side surface of the boss 32a facing the traction rod 31, a second groove 32c is formed on the side surface of the boss 32a in the direction of the traction rod 31, a return spring 33 is arranged in the space formed by the first groove 31c and the second groove 32c, and two ends of the return spring are respectively connected with the traction rod 31 and the bracket 32.
Optionally, one end of the bracket 32 is folded into the base 1 and extends inwards to form a folded end 32b, which is provided with a hole 325 for mounting the alarm switch 4, the contact of the alarm switch 4 faces away from the drawbar 31, and the side of the alarm switch is mounted on the folded end 32b by a screw.
Optionally, counterbores 324 are symmetrically formed at two ends of the bracket 32, the counterbores 324 are matched with the base hole 111 on the rib 11 in the base 1, and the bracket 32 is mounted on the rib 11 by screws through the counterbores 324.
Optionally, the thermomagnetic system 2 includes a bimetallic strip 21, a thermal element 22, a connection plate 23, an armature bracket 24 and an armature 25, one end of the thermal element 22 is connected to a contact device of the circuit breaker, the other end of the thermal element is welded to the connection plate 23, and the other end of the connection plate 23 is connected to a wiring device of the circuit breaker; the armature bracket 24 is of a U-shaped structure, the bimetallic strip 21 and the thermal element 22 are inserted into the U-shaped structure of the armature bracket 24, an iron core 26 is further arranged between the armature bracket 24 and the thermal element 22, the bimetallic strip 21, the thermal element 22, the iron core 26 and the armature bracket 24 are fixed through rivets 29, and an adjusting screw 27 matched with the transmission mechanism 3 is further arranged at the other end of the bimetallic strip 21; the armature 25 is rotatably arranged in the armature bracket 24 through the matching between convex ribs 25a arranged at two sides of the armature 25 and notches 24a arranged at two sides of the armature bracket 24, both ends of two clamping edges of the armature bracket 24 are also provided with bending parts 24b which are bent inwards and used for limiting the rotating angle of the armature 25, and a counter force spring 28 is connected between the armature 25 and the armature bracket 24; when the overload current in the system reaches a setting value, the bimetallic strip 21 is heated by the thermal element 21 to bend and push the transmission mechanism 3 to give an alarm, and when a short circuit occurs in the system, the iron core 26 attracts the armature 25 to rotate so as to push the tripping mechanism to trip.
The thermal overload alarm non-tripping device of the circuit breaker can send out alarm signals when overload current occurs in a circuit without breaking the circuit breaker, realizes the output of the alarm signals through the horizontal sliding of the traction rod, effectively reduces the overall height of the circuit breaker, and has the characteristics of compact structure, space saving and low manufacturing cost.
Drawings
FIG. 1 is a schematic structural diagram of a thermal overload alarm trip device of the present invention;
FIG. 2 is a schematic view of the construction of a drawbar according to the present invention;
FIG. 3 is a schematic structural view of the stent of the present invention;
FIG. 4 is a schematic diagram of the structure of the thermomagnetic system of the present invention;
fig. 5 is a schematic structural view of the base of the present invention.
Detailed Description
The following further describes a specific embodiment of the thermal overload alarm trip device of the present invention with reference to the embodiments shown in fig. 1 to 4. The thermal overload alarm non-trip apparatus of the present invention is not limited to the description of the following embodiments.
As shown in fig. 1-3, the circuit breaker includes a base 1, a thermomagnetic system 2 disposed in the base 1, a transmission mechanism 3, and an alarm switch 4, and a rib 11 for separating contact systems of respective poles is disposed in the base 1. The thermomagnetic system 2 is matched with the transmission mechanism 3, the transmission mechanism 3 is arranged between the thermomagnetic system 2 and the alarm switch 4, the transmission mechanism 3 comprises a bracket 32 arranged on the convex rib 11 and a traction rod 31 connected with the bracket 32, one side of the traction rod 31 departing from the bracket 32 is provided with an extension end 31a, the other end of the extension end 31a is respectively and vertically provided with a drive plate 313, one end of a bimetallic strip 21 in the thermomagnetic system 2 is inserted between the drive plate 313 and the traction rod 31, when the overload current in the system reaches a set value, the thermomagnetic system 2 bends towards the direction of the drive plate 313 and pushes the traction rod 31 to slide in a horizontal plane deviating from the bracket 32, and after the overload current in the system reaches a certain distance, the traction rod 31 can trigger the alarm switch 4 to output an alarm signal. In the embodiment, the three-pole circuit breaker is provided, three thermomagnetic systems 2 are arranged in the base 1, and the three thermomagnetic systems 2 are matched with one traction rod 31 to realize alarm output. The thermal overload alarm non-tripping device of the circuit breaker realizes the output of the alarm signal through the horizontal sliding of the traction rod, thereby effectively reducing the space occupied by the whole circuit breaker in the height direction.
As shown in fig. 1 to 3, two horizontally extending guide shafts 321 are symmetrically disposed on the side of the bracket 32 facing the drawbar 31, a shaft hole 311 is disposed on the drawbar 31 to be engaged with the guide shaft 321, the guide shaft 321 is inserted into the shaft hole 311 to be engaged therewith, and the guide shaft 321 supports the drawbar 31 and further restricts the moving direction of the drawbar 31 in the extending direction of the guide shaft 321. The cooperation of guiding axle and shaft hole realizes horizontal migration, can play the spacing effect of installation, slip and direction simultaneously, and for other common sliding connection such as spout, the structure of guiding axle 321 cooperation in inserting shaft hole 311 is simpler, and manufacturing cost is also cheap relatively. Three extending ends 31a are symmetrically arranged on one side of the traction rod 31 close to the bimetallic strip 21, and the other ends of the extending ends 31a are respectively provided with a driving plate 313. The bimetallic strip 21 in the thermomagnetic system 2 is inserted between the driving plate 313 and the traction rod 31, a certain interval is formed between the bimetallic strip 21 and the driving plate 313 when the overload current in the system does not reach a set value, and when the overload current in the system reaches the set value, the bimetallic strip 21 bends towards the driving plate 313 and pushes the driving plate 313, so that the traction rod 31 is driven to move towards the direction away from the bracket 32. The bimetallic strip 21 is inserted between the driving plate 313 and the traction rod 31, so that the space occupied by the thermal overload alarm non-tripping device of the circuit breaker in the horizontal direction is effectively saved, and the whole circuit breaker is more compact. Meanwhile, a draw hook 314 for closing the alarm switch 4 is further arranged on one side of the draw bar 31 facing the bracket 32, the draw hook 314 is an end of the draw bar 31 on the side close to the bracket 32, extends towards the bracket 32, penetrates through the bracket 32 from the upper part, is folded towards the alarm switch 4 arranged on the bracket 32, and the inner side of the hook part of the draw hook 314 touches the contact point of the alarm switch 4 to close the alarm switch 4. In addition, a return spring 33 is arranged between the traction rod 31 and the bracket 32, the return spring 33 is respectively connected between the traction rod 31 and the bracket 32 through a spring hole 312 on the traction rod 31 and a spring hole 322 on the bracket 32, when the overload current in the system reaches a set value, the bimetallic strip 21 in the thermomagnetic system 2 bends and drives the traction rod 31 to move away from the bracket 32, at the moment, the return spring 33 is stretched, when the overload current of the set value in the system disappears, the bimetallic strip 21 in the thermomagnetic system 2 automatically returns to the original working state due to the physical characteristics of the bimetallic strip, and the traction rod 31 returns to the original working state due to the elastic restoring force of the return spring 33.
It should be noted that, in this embodiment, the alarm switch 4 is disposed inside the hook portion of the hook 314, so that the space volume occupied by the thermal overload alarm trip-free device of the circuit breaker in this embodiment can be effectively reduced, the overall structure can be more compact, and in addition, after the current of the set value in the system disappears, the alarm switch 4 can be quickly turned off by means of the characteristics of the alarm switch 4 itself to release the output of the alarm signal. In addition, since the first groove 31c and the second groove 32c are respectively arranged on the rod bodies of the traction rod 31 and the bracket 32, a space enough for accommodating the return spring 33 can be reserved when the traction rod 31 is matched with the bracket 32, and the structure of the thermal overload alarm tripping device of the circuit breaker is further compact.
Specifically, as shown in fig. 2, the traction rod 31 is in a "bow" shape as a whole, a middle portion thereof is convexly bent in a direction away from the bracket 32 to form a convex-bent portion 31b, a first groove 31c is formed on a side of the convex-bent portion 31b facing the bracket 32, and shaft holes 311 facing the bracket 32 are formed at both ends of a clamping edge of the first groove 31 c. The traction rod 31, the extension end 31a and the driving plate 313 are perpendicular to each other, but as another embodiment, the traction rod 31, the extension end 31a and the driving plate 313 may have other angles.
Specifically, as shown in fig. 3, a boss 32a folded upward is provided in the middle of the bracket 32, the guide shaft 321 is symmetrically provided on a side surface of the boss 32a facing the drawbar 31, the boss 32a forms a second groove 32c on a side surface in the direction of the drawbar 31, the return spring 33 is provided in a space formed by the first groove 31c and the second groove 32c, and both ends are respectively connected to the drawbar 31 and the bracket 32. One end of the bracket 32 is folded into the base 1 and extends inwards to form a folded end 32b, which is provided with a hole 325 for mounting the alarm switch 4, the contact of the alarm switch 4 faces away from the drawbar 31, and the side of the alarm switch is mounted on the folded end 32b by a screw. Meanwhile, counterbores 324 are symmetrically arranged at two ends of the support frame 32, the counterbores 324 are matched with the base holes 111 on the convex ribs 11 in the base 1, and the support frame 32 is installed on the convex ribs 11 through the counterbores 324 by screws. A stop 323 is provided on the side of the projection 32a facing away from the drawbar 31.
As shown in fig. 4, the thermomagnetic system 2 comprises a bimetallic strip 21, a thermal element 22, a connecting plate 23, an armature bracket 24 and an armature 25, wherein one end of the thermal element 22 is connected with a contact device of the circuit breaker, the other end of the thermal element is welded with the connecting plate 23, and the other end of the connecting plate 23 is connected with a wiring device of the circuit breaker; the armature bracket 24 is of a U-shaped structure, the bimetallic strip 21 and the thermal element 22 are inserted into the U-shaped structure of the armature bracket 24, an iron core 26 is further arranged between the armature bracket 24 and the thermal element 22, the bimetallic strip 21, the thermal element 22, the iron core 26 and the armature bracket 24 are fixed through rivets 29, and an adjusting screw 27 matched with the transmission mechanism 3 is further arranged at the other end of the bimetallic strip 21; the armature 25 is rotatably mounted in the armature bracket 24 by the engagement between the ribs 25a provided on both sides thereof and the notches 24a provided on both sides of the armature bracket 24, bent portions 24b bent inward for restricting the rotation angle of the armature 25 are further provided at both ends of both clamping sides of the armature bracket 24, and a reaction spring 28 is connected between the armature 25 and the armature bracket 24. When the overload current in the system reaches a setting value, the bimetallic strip 21 is heated by the thermal element 21 to bend and push the transmission mechanism 3 to give an alarm, and when a short circuit occurs in the system, the iron core 26 attracts the armature 25 to rotate so as to push the tripping mechanism to trip. Correspondingly, after the current of the setting value disappears, the bimetallic strip 21 or the armature 25 automatically returns to the working position when the system is normal. The thermomagnetic system 2 is fixed in the base 1 by means of screws, respectively by means of holes 30 provided on the thermal element 22 cooperating with the holes 12 of the base 1 and by means of holes 231 provided on the crosspiece 23 cooperating with the holes 13 of the base 1.
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.
Claims (9)
1. The utility model provides a thermal overload of circuit breaker does not trip gear that reports to police, includes base (1) and sets up thermomagnetic system (2), drive mechanism (3) and alarm switch (4) in base (1), and drive mechanism (3) set up between thermomagnetic system (2) and alarm switch (4), its characterized in that: the transmission mechanism (3) comprises a bracket (32) and a traction rod (31) which is in horizontal sliding fit with the bracket (32), when the overload current in the system reaches a setting value, the thermomagnetic system (2) drives the traction rod (31) in the transmission mechanism (3) to horizontally move in the direction away from the bracket (32), and after the traction rod (31) moves for a certain distance, the alarm switch (4) is triggered by the traction rod to output an alarm signal; the bracket (32) is provided with a guide shaft (321) extending horizontally on the side surface facing the traction rod (31), a shaft hole (311) matched with the guide shaft (321) is arranged on the traction rod (31), the guide shaft (321) is inserted into the shaft hole (311) to be matched to support the traction rod (31), and meanwhile, the traction rod (31) is limited to horizontally slide back and forth only along the extending direction of the guide shaft (321).
2. The thermal overload alarm trip device of a circuit breaker according to claim 1, wherein: an extension end (31a) is arranged on one side of the traction rod (31) close to the thermomagnetic system (2), a driving plate (313) is vertically arranged on the other end of the extension end (31a), and a bimetallic strip (21) in the thermomagnetic system (2) is inserted between the driving plate (313) and the traction rod (31) and is matched with the driving plate (313).
3. The thermal overload alarm trip device of a circuit breaker according to claim 1, wherein: and a draw hook (314) which extends towards the support (32) and is folded towards the alarm switch (4) is arranged on the side surface of the traction rod (31) facing the support (32), and the inner side of the hook part of the draw hook (314) touches the contact of the alarm switch (4) to close the alarm switch (4) after the draw hook (314) moves for a certain distance along with the traction rod (31).
4. The thermal overload alarm trip device of a circuit breaker according to claim 1, wherein: the transmission mechanism (3) comprises a return spring (33), two ends of the return spring (33) are respectively connected with the traction rod (31) and the support (32), when the thermo-magnetic system (2) drives the traction rod (31) to move away from the support (32), the return spring (33) is stretched, and after the thermo-magnetic system (2) releases the action on the traction rod (31), the return spring (33) drives the traction rod (31) to return to a working position when the system is normal.
5. The thermal overload alarm trip device of a circuit breaker according to claim 1, wherein: the traction rod (31) is in a bow shape as a whole, the middle part of the traction rod is convexly folded in the direction departing from the support (32) to form a convex folding part (31b), a first groove (31c) is formed on one side, facing the support (32), of the convex folding part (31b), and shaft holes (311) facing the support (32) are formed in two ends of the clamping edge of the first groove (31 c).
6. The thermal overload alarm trip device of a circuit breaker according to claim 5, wherein: a boss (32a) which is convexly bent upwards is arranged in the middle of the support (32), the guide shaft (321) is arranged on the side face, facing the traction rod (31), of the boss (32a), a second groove (32c) is formed in the side face, in the direction of the traction rod (31), of the boss (32a), the return spring (33) is arranged in a space formed by the first groove (31c) and the second groove (32c), and two ends of the return spring are connected with the traction rod (31) and the support (32) respectively.
7. The thermal overload alarm trip device of a circuit breaker according to claim 1, wherein: one end of the support (32) is folded into the base (1) and extends inwards to form a folded end (32b), a hole (325) for mounting the alarm switch (4) is formed in the folded end, a contact of the alarm switch (4) faces the direction departing from the traction rod (31), and the side face of the alarm switch is mounted at the folded end (32b) through a screw.
8. The thermal overload alarm trip device of a circuit breaker according to claim 1, wherein: counter bores (324) are symmetrically arranged at two ends of the support (32), the counter bores (324) are matched with the base holes (111) in the convex ribs (11) in the base (1), and the support (32) is installed on the convex ribs (11) through the counter bores (324) by screws.
9. The thermal overload alarm trip device of a circuit breaker according to claim 1, wherein: the thermomagnetic system (2) comprises a bimetallic strip (21), a thermal element (22), a connecting plate (23), an armature bracket (24) and an armature (25), one end of the thermal element (22) is connected with a contact device of the circuit breaker, the other end of the thermal element is welded with the connecting plate (23), and the other end of the connecting plate (23) is connected with a wiring device of the circuit breaker; the armature bracket (24) is of a U-shaped structure, the bimetallic strip (21) and the thermal element (22) are inserted into the U-shaped structure of the armature bracket (24), an iron core (26) is further arranged between the armature bracket (24) and the thermal element (22), the bimetallic strip (21), the thermal element (22), the iron core (26) and the armature bracket (24) are fixed through rivets (29), and an adjusting screw (27) matched with the transmission mechanism (3) is further arranged at the other end of the bimetallic strip (21); the armature (25) is rotatably arranged in the armature bracket (24) through the matching between convex ribs (25a) arranged on two sides of the armature (25) and notches (24a) on two sides of the armature bracket (24), two ends of two clamping edges of the armature bracket (24) are also provided with bending parts (24b) which are bent inwards and used for limiting the rotating angle of the armature (25), and a counter force spring (28) is connected between the armature (25) and the armature bracket (24); when the overload current in the system reaches a setting value, the bimetallic strip (21) is heated by the thermal element (21) to bend and push the transmission mechanism (3) to give an alarm, and when a short circuit occurs in the system, the iron core (26) attracts the armature (25) to rotate to push the tripping mechanism to trip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510922871.3A CN106876220B (en) | 2015-12-14 | 2015-12-14 | Thermal overload alarm non-tripping device of circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510922871.3A CN106876220B (en) | 2015-12-14 | 2015-12-14 | Thermal overload alarm non-tripping device of circuit breaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106876220A CN106876220A (en) | 2017-06-20 |
| CN106876220B true CN106876220B (en) | 2020-02-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510922871.3A Active CN106876220B (en) | 2015-12-14 | 2015-12-14 | Thermal overload alarm non-tripping device of circuit breaker |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113921345A (en) * | 2021-09-01 | 2022-01-11 | 乐清市海格物联科技有限公司 | Low-voltage intelligent circuit breaker |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0949646A2 (en) * | 1998-03-24 | 1999-10-13 | ABB Elettrocondutture S.p.A. | Accessory device for a magnetothermal circuit breaker |
| CN102683124A (en) * | 2011-03-10 | 2012-09-19 | 北京正北元电器有限公司 | Overload alarm non-tripping device of thermomagnetic plastic housing circuit breaker |
| CN204230175U (en) * | 2014-11-19 | 2015-03-25 | 江苏凯隆电器有限公司 | There is the breaker of plastic casing of a thermal overload alarm non-tripping function |
| CN205335193U (en) * | 2015-12-14 | 2016-06-22 | 浙江正泰电器股份有限公司 | Hot not trip gear that reports to police that transships of circuit breaker |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102800537B (en) * | 2012-07-27 | 2014-12-10 | 浙江中凯科技股份有限公司 | Signal transmission mechanism of overcurrent tripper |
| CN203588951U (en) * | 2013-12-02 | 2014-05-07 | 南京工程学院 | Thermomagnetic tripper with thermal compensation function |
-
2015
- 2015-12-14 CN CN201510922871.3A patent/CN106876220B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0949646A2 (en) * | 1998-03-24 | 1999-10-13 | ABB Elettrocondutture S.p.A. | Accessory device for a magnetothermal circuit breaker |
| CN102683124A (en) * | 2011-03-10 | 2012-09-19 | 北京正北元电器有限公司 | Overload alarm non-tripping device of thermomagnetic plastic housing circuit breaker |
| CN204230175U (en) * | 2014-11-19 | 2015-03-25 | 江苏凯隆电器有限公司 | There is the breaker of plastic casing of a thermal overload alarm non-tripping function |
| CN205335193U (en) * | 2015-12-14 | 2016-06-22 | 浙江正泰电器股份有限公司 | Hot not trip gear that reports to police that transships of circuit breaker |
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| Publication number | Publication date |
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| CN106876220A (en) | 2017-06-20 |
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Application publication date: 20170620 Assignee: Wenzhou Zhengtai Electrical Technology Co., Ltd Assignor: Zhejiang Chint Electrics Co.,Ltd. Contract record no.: X2020330000078 Denomination of invention: Thermal overload alarm non tripping device of circuit breaker Granted publication date: 20200218 License type: Common License Record date: 20201021 |