CN219106059U - Tripping device and overvoltage and overcurrent protection device - Google Patents
Tripping device and overvoltage and overcurrent protection device Download PDFInfo
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- CN219106059U CN219106059U CN202223613555.2U CN202223613555U CN219106059U CN 219106059 U CN219106059 U CN 219106059U CN 202223613555 U CN202223613555 U CN 202223613555U CN 219106059 U CN219106059 U CN 219106059U
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- overcurrent protection
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The utility model discloses a tripping device and an overvoltage and overcurrent protection device, wherein the tripping device comprises: the device comprises a first electrode, a tripping assembly, a first overvoltage and overcurrent protection unit, a fuse and a second electrode; the tripping assembly and the first overvoltage and overcurrent protection unit are connected in series to form a series loop which is connected between the first electrode and the second electrode; the fuse is connected in parallel with two ends of the tripping component. The utility model can avoid the arcing phenomenon when the protective function of the tripping device is started.
Description
Technical Field
The embodiment of the utility model relates to the technical field of overvoltage and overcurrent protection, in particular to a tripping device and an overvoltage and overcurrent protection device.
Background
Trip devices, such as those containing TVS (Transient Voltage Suppressor, transient diode), have a good effect on surge protection and thus have wide application in dc power sources.
However, the conventional power TVS is basically in a short-circuit state after failure, and has extremely small internal resistance after failure, and if the TVS is not disconnected, electric fire accidents are easily caused. One solution is to adopt a tripping technology, but the tripping technology has better effect under small current, but under large current, the tripping arcing is serious, even no tripping occurs, and fire disaster is easy to cause.
Disclosure of Invention
The utility model provides a tripping device, which is used for avoiding the arcing phenomenon when the protective function of the tripping device is started.
In a first aspect, an embodiment of the present utility model provides a trip device, including:
the device comprises a first electrode, a tripping assembly, a first overvoltage and overcurrent protection unit, a fuse and a second electrode;
the tripping assembly and the first overvoltage and overcurrent protection unit are connected in series to form a series loop which is connected between the first electrode and the second electrode;
the fuse is connected in parallel with two ends of the tripping component.
Optionally, one end of the tripping component is connected with the first electrode, and the other end of the tripping component is connected with the second electrode through the first overvoltage and overcurrent protection unit.
Optionally, the trip device further includes a second overvoltage and overcurrent protection unit, the other end of the fuse is connected with the second electrode through the second overvoltage and overcurrent protection unit, and the second overvoltage and overcurrent protection unit is connected with the first overvoltage and overcurrent protection unit in parallel.
Optionally, the first overvoltage/overcurrent protection unit is a transient suppression diode.
Optionally, the trip assembly includes:
a spring plate and a tension spring; one end of the elastic sheet is connected with the first electrode, and the other end of the elastic sheet is connected with the first overvoltage and overcurrent protection unit;
the tension spring is configured to pull the elastic sheet to disconnect the elastic sheet from the first overvoltage and overcurrent protection unit.
Optionally, the first overvoltage and overcurrent protection unit and the fuse are respectively located at two opposite sides of the elastic sheet.
Optionally, the spring plate and the first overvoltage and overcurrent protection unit are welded by low-temperature solder.
Optionally, one end of the tension spring is connected with the elastic sheet, and the other end of the tension spring is fixed.
Optionally, the trip device further includes a fixed conductive member, one end of the fixed conductive member is connected to the first electrode, and the fuse is fixedly connected to the fixed conductive member.
Optionally, the fuse is disposed at a side of the fixed conductive element away from the elastic sheet.
In a second aspect, an embodiment of the present utility model further provides an overvoltage and overcurrent protection device, where the overvoltage and overcurrent protection device includes the trip device of the first aspect and a housing, and the housing exposes the first electrode and the second electrode; the housing is formed with a receiving cavity, and the trip assembly, the first overvoltage and overcurrent protection unit and the fuse are disposed in the receiving cavity.
According to the technical scheme provided by the embodiment of the utility model, the adopted tripping device comprises: the device comprises a first electrode, a tripping assembly, a first overvoltage and overcurrent protection unit, a fuse and a second electrode; the tripping assembly and the first overvoltage and overcurrent protection unit are connected in series to form a series loop which is connected between the first electrode and the second electrode; the fuse is connected in parallel with two ends of the tripping component. The fuse of the first overvoltage and overcurrent protection unit is equivalent to two ends of a series branch consisting of the tripping assembly and the first overvoltage and overcurrent protection unit in parallel, and when the tripping assembly trips, current between the first electrode and the second electrode is conducted through the fuse and is not conducted through the tripping assembly any more, so that the arcing phenomenon of the tripping assembly is avoided; meanwhile, the fuse can cut off the current very quickly, so that the tripping device is ensured to be safe enough.
Drawings
Fig. 1 is a schematic structural diagram of a trip device according to an embodiment of the present utility model;
fig. 2 is a schematic structural diagram of a trip device according to another embodiment of the present utility model;
fig. 3 is a schematic circuit structure diagram corresponding to a trip device according to an embodiment of the present utility model.
Detailed Description
The utility model is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present utility model are shown in the drawings.
Fig. 1 is a schematic structural diagram of a trip device according to an embodiment of the present utility model, fig. 2 is a schematic structural diagram of another trip device according to an embodiment of the present utility model, and fig. 3 is a schematic circuit structure diagram corresponding to the trip device according to an embodiment of the present utility model, where, in combination with fig. 1 to fig. 3, the trip device includes: a first electrode 11 (48V in fig. 3), a trip assembly 12, a first overvoltage and overcurrent protection unit 13, a fuse 14, and a second electrode (RTN in fig. 3); the tripping component 12 and the first overvoltage and overcurrent protection unit 13 are connected in series to form a series loop which is connected between the first electrode 11 and the second electrode; the fuse 14 is connected in parallel across the trip assembly 12.
Specifically, the tripping device can be used for preventing large surge current or voltage from occurring in an electronic circuit, the first electrode 11 and the second electrode are respectively connected to two ends of a loop to be protected in the electronic circuit, and when the large surge current or voltage occurs in the loop to be protected, the first overvoltage and overcurrent protection unit 13 timely absorbs most of energy, so that the electronic circuit is prevented from being damaged; the trip assembly 12 is capable of conducting the current of the first electrode 11 to the first overvoltage and overcurrent protection unit 13 and ultimately to the second electrode; the trip component 12 is equivalent to a switch, when the first overvoltage and overcurrent protection unit 13 absorbs energy, the first overvoltage and overcurrent protection unit 13 generates heat, if the first overvoltage and overcurrent protection unit 13 is not disconnected from the loop, the first overvoltage and overcurrent protection unit 13 is damaged, so when the first overvoltage and overcurrent protection unit 13 absorbs large energy due to large surge in the loop, the trip component 12 is disconnected, the electric connection between the first overvoltage and overcurrent protection unit 13 and the first electrode 11 is disconnected, and the first overvoltage and overcurrent protection unit 13 is prevented from overheating, even a fire phenomenon occurs; meanwhile, in the tripping process of the tripping assembly 12, the tripping assembly 12 still has current, so that the phenomenon of arc discharge possibly occurs in the tripping process, namely, electric fire arc can occur, and the tripping device possibly fires due to the existence of the electric fire arc; in the embodiment, by arranging the fuse 14, the fuse 14 is equivalently connected in parallel at two ends of a serial branch consisting of the tripping assembly 12 and the first overvoltage and overcurrent protection unit 13, when the tripping assembly 12 trips, the current between the first electrode 11 and the second electrode is conducted through the fuse 14 and is not conducted through the tripping assembly 12 any more, so that the arcing phenomenon of the tripping assembly 12 is avoided; at the same time, the fuse 14 can also cut off the current very quickly, thereby ensuring that the trip device is sufficiently safe.
According to the technical scheme of the embodiment, the tripping device comprises: the device comprises a first electrode, a tripping assembly, a first overvoltage and overcurrent protection unit, a fuse and a second electrode; the tripping assembly and the first overvoltage and overcurrent protection unit are connected in series to form a series loop which is connected between the first electrode and the second electrode; the fuse is connected in parallel with two ends of the tripping component. When the tripping component trips, current between the first electrode and the second electrode is conducted through the fuse and is not conducted through the tripping component any more, so that arc discharge of the tripping component is avoided; meanwhile, the fuse can cut off the current very quickly, so that the tripping device is ensured to be safe enough.
Illustratively, as shown in fig. 3, one end of the trip assembly 12 is connected to the first electrode 11, and the other end of the trip assembly 12 is connected to the second electrode through the first overvoltage and overcurrent protection unit 13; illustratively, at this point one end of the fuse 14 is connected to the first electrode 11, and both the other end of the trip assembly 12 and the other end of the fuse 14 are connected to the intermediate electrode 20. Of course, in other embodiments, one end of the first overvoltage/overcurrent protection unit 13 may be connected to the first electrode 11, and the other end of the first overvoltage/overcurrent protection unit 13 may be connected to the second electrode through the trip assembly 12.
It should be noted that, as shown in fig. 3, the trip device may further include a monitoring end Signal, where the monitoring end Signal is connected with the other end of the trip assembly 12 and the other end of the fuse, and the external monitoring circuit may be used to determine whether the trip assembly 12 is tripped and whether the fuse 14 is blown.
Optionally, with continued reference to fig. 1 to 3, the trip device further comprises a second overvoltage and overcurrent protection unit 15, which may be, for example, a semiconductor discharge tube (Thyristor Surge Suppressors, TSS), the second overvoltage and overcurrent protection unit 15 being connected in parallel with the first overvoltage and overcurrent protection unit 13. Of course, the second overvoltage/overcurrent protection unit 15 may also be a transient suppression diode (Transient Voltage Suppressor, TVS) or a varistor, etc.
Specifically, when the voltage of the second overvoltage/overcurrent protection unit 15 is lower than the operation voltage thereof, the leakage current is extremely small and corresponds to the open circuit state, and at this time, the tripping device is correspondingly connected in the loop to be protected only by the tripping assembly 12 and the first overvoltage/overcurrent protection unit 13; when the external voltage continues to increase, breakdown starts to occur; and when further increased, the ends of the tube became on. In the present embodiment, the fuse 14 and the first electrode are connected, and the second overvoltage/overcurrent protection unit 15 and the second electrode are connected as an example; in other embodiments, however, one end of the fuse 14 is connected to the second electrode, and the other end of the fuse 14 is connected to the first electrode 11 through the second overvoltage/overcurrent protection unit 15.
Optionally, the first overvoltage/overcurrent protection unit 13 is a transient suppression diode, when two poles of the transient suppression diode are impacted by reverse transient high energy, the high resistance state between the two poles is changed into a low resistance state at a very fast speed, and the very high surge power is absorbed, so that the voltage between the two poles is clamped at a preset value, and various devices in an electronic circuit to be protected are effectively protected from being damaged by various surge pulses. Of course, the first overvoltage/overcurrent protection unit 13 may also be a semiconductor discharge tube, a varistor or the like.
Optionally, referring to fig. 1 and 2, the trip assembly 12 includes a spring plate 121 and a tension spring 122; one end of the elastic sheet 121 is connected with the first electrode 11, and the other end of the elastic sheet 121 is connected with the first overvoltage and overcurrent protection unit 13; the tension spring 122 is configured to pull the spring to disconnect the spring from the first overvoltage and overcurrent protection unit 13.
Specifically, the elastic sheet 121 may be, for example, a metal elastic sheet, and has conductivity, one end is electrically connected to the first electrode 11, and the other end is electrically connected to the first overvoltage/overcurrent protection unit 13; fig. 1 is a schematic structural diagram corresponding to the connection of the elastic sheet 121 and the first overvoltage/overcurrent protection unit 13, fig. 2 is a schematic structural diagram corresponding to the disconnection of the elastic sheet 121 and the first overvoltage/overcurrent protection unit 13, when the first overvoltage/overcurrent protection unit 13 does not absorb large surge energy and generates heat, the elastic sheet 121 and the first overvoltage/overcurrent protection unit 13 always maintain a connection state, and when the first overvoltage/overcurrent protection unit 13 absorbs large surge energy and generates heat, the first overvoltage/overcurrent protection unit 13 generates heat, so that the connection force between the first overvoltage/overcurrent protection unit 13 and the elastic sheet 121 is weakened, and at this time, the elastic sheet 121 and the first overvoltage/overcurrent protection unit 13 are disconnected under the action of the tension spring 122.
Optionally, the spring piece 121 and the first overvoltage and overcurrent protection unit 13 are soldered by low-temperature solder.
Specifically, the melting temperature of the low-temperature solder is low, for example, lower than 200 degrees celsius, and when the first overvoltage and overcurrent protection unit 13 absorbs large energy to generate heat, the low-temperature solder melts, so that the connection between the spring piece 121 and the first overvoltage and overcurrent protection unit 13 is disconnected, and the spring piece 121 is pulled away from the first overvoltage and overcurrent protection unit 13 by the tension spring 122.
Optionally, with continued reference to fig. 1 and 2, the first overvoltage and overcurrent protection unit 13 and the fuse 14 are respectively located on opposite sides of the elastic sheet 121.
Specifically, the farther the distance between the first overvoltage and overcurrent protection unit 13 and the fuse 14 is, the smaller the interaction therebetween, so that the trip device 13 and the fuse 14 can be disposed at opposite sides of the elastic piece 131, thereby avoiding the interaction therebetween.
Alternatively, with continued reference to fig. 1 and 2, one end of the tension spring 122 is connected to the spring piece 121, and the other end of the tension spring 122 is fixed. When the elastic sheet 121 and the first overvoltage and overcurrent protection unit 13 are kept connected, the tension spring 122 is in an open state, tension exists between the tension spring 122 and the elastic sheet 121, but due to the action of low-temperature solder, the elastic sheet 121 and the first overvoltage and overcurrent protection unit 13 are still connected, after the low-temperature solder melts, the tension spring 122 is restored to an original state due to the action of the elastic force, and one end, connected with the elastic sheet, of the tension spring can move, the other end cannot move, so that the elastic sheet 121 is pulled in a direction away from the first overvoltage and overcurrent protection unit 13, and disconnection between the elastic sheet 121 and the first overvoltage and overcurrent protection unit 13 is guaranteed.
Optionally, with continued reference to fig. 1 and 2, the trip device further includes a fixed conductive member 16, one end of the fixed conductive member 16 is connected to the first electrode 11, and the fuse 14 is fixedly connected to the fixed conductive member 16. The fixed conductive member 16 can conduct the electrical signal on the first electrode 11 to the fuse 14, and by fixedly and electrically connecting the fuse 14 to the fixed conductive member 16, support can be provided for the fuse 14, so that the fuse 14 is prevented from affecting the first overvoltage/overcurrent protection unit 13 due to movement and the like. Preferably, the fixed conductive member 16, the first electrode 11 and the elastic sheet 121 are integrally formed.
Optionally, with continued reference to fig. 1 and 2, the fuse 14 is disposed on a side of the fixed conductive member 16 away from the spring 121. By this arrangement, the distance between the fuse 14 and the first overvoltage/overcurrent protection unit 13 can be made longer, thereby further avoiding the influence therebetween.
Optionally, the embodiment of the present utility model further provides an overvoltage and overcurrent protection device, where the overvoltage and overcurrent protection device includes the trip device and the housing provided in any embodiment of the present utility model, and the housing exposes the first electrode 11 and the second electrode; the housing is formed with a receiving cavity in which the trip assembly 12, the first overvoltage and overcurrent protection unit 13, and the fuse 14 are disposed. The casing can protect the devices arranged in the accommodating cavity, such as protecting the devices from being corroded by water and oxygen, so that the service life of the tripping device is prolonged.
Note that the above is only a preferred embodiment of the present utility model and the technical principle applied. It will be understood by those skilled in the art that the present utility model is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the utility model. Therefore, while the utility model has been described in connection with the above embodiments, the utility model is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the utility model, which is set forth in the following claims.
Claims (10)
1. A trip device, the trip device comprising:
the device comprises a first electrode, a tripping assembly, a first overvoltage and overcurrent protection unit, a fuse and a second electrode;
the tripping assembly and the first overvoltage and overcurrent protection unit are connected in series to form a series loop which is connected between the first electrode and the second electrode;
the fuse is connected in parallel with two ends of the tripping component.
2. The trip device of claim 1 wherein one end of the trip assembly is connected to the first electrode and the other end of the trip assembly is connected to the second electrode through the first overvoltage and overcurrent protection unit.
3. The trip device of claim 2 further comprising a second overvoltage and overcurrent protection unit connected in parallel with the first overvoltage and overcurrent protection unit.
4. The trip unit of claim 2, wherein said trip assembly comprises:
a spring plate and a tension spring; one end of the elastic sheet is connected with the first electrode, and the other end of the elastic sheet is connected with the first overvoltage and overcurrent protection unit;
the tension spring is configured to pull the elastic sheet to disconnect the elastic sheet from the first overvoltage and overcurrent protection unit.
5. The trip device of claim 4, wherein the first overvoltage and overcurrent protection unit and the fuse are respectively located at two opposite sides of the spring plate.
6. The trip device of claim 4 wherein said spring plate is soldered to said first overvoltage and overcurrent protection unit by means of a low temperature solder.
7. The trip device of claim 4, wherein one end of the tension spring is connected to the spring plate, and the other end of the tension spring is fixed.
8. The trip unit of claim 4, further comprising a fixed conductive member, wherein one end of the fixed conductive member is connected to the first electrode, and wherein the fuse is fixedly connected to the fixed conductive member.
9. The trip unit of claim 8, wherein the fuse is disposed on a side of the fixed conductive member remote from the spring plate.
10. An overvoltage and overcurrent protection device, characterized in that the overvoltage and overcurrent protection device comprises the trip device of any one of claims 1 to 9 and a housing exposing the first electrode and the second electrode; the housing is formed with a receiving cavity, and the trip assembly, the first overvoltage and overcurrent protection unit and the fuse are disposed in the receiving cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223613555.2U CN219106059U (en) | 2022-12-30 | 2022-12-30 | Tripping device and overvoltage and overcurrent protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223613555.2U CN219106059U (en) | 2022-12-30 | 2022-12-30 | Tripping device and overvoltage and overcurrent protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219106059U true CN219106059U (en) | 2023-05-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223613555.2U Active CN219106059U (en) | 2022-12-30 | 2022-12-30 | Tripping device and overvoltage and overcurrent protection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219106059U (en) |
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- 2022-12-30 CN CN202223613555.2U patent/CN219106059U/en active Active
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