CN211266449U - Overload protection device and electrical equipment - Google Patents
Overload protection device and electrical equipment Download PDFInfo
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- CN211266449U CN211266449U CN202020081751.1U CN202020081751U CN211266449U CN 211266449 U CN211266449 U CN 211266449U CN 202020081751 U CN202020081751 U CN 202020081751U CN 211266449 U CN211266449 U CN 211266449U
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Abstract
The utility model relates to an overload protection device and electrical equipment, wherein, overload protection device, include: the self-recovery fuse and the plug-in power resistor connected with the self-recovery fuse are connected; the plug-in power resistor is tightly attached to the self-recovery fuse. The utility model discloses overload protection device can enter into high resistant state by the quick response and protect equipment, and simple structure easily realizes, low cost.
Description
Technical Field
The utility model relates to an electronic circuit technical field, in particular to overload protection device and electrical equipment.
Background
When a user uses the device, the user usually does not know the specification of the power supply product intentionally, so that some faults caused by improper use can occur. Although an overload protection circuit is arranged in the traditional technology, the overload protection circuit has the problems that a disposable device cannot be recovered after being fused and is inconvenient to use, or a circuit is complex and has high cost, or short-circuit current is large, so that equipment cannot be protected in time, and the like.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an overload protection device and electrical equipment to the problem that the conventional art exists.
In one embodiment, the present invention provides an overload protection apparatus, comprising: the self-recovery fuse and the plug-in power resistor connected with the self-recovery fuse are connected;
the plug-in power resistor is tightly attached to the upper part of the self-recovery fuse.
In one embodiment, a self-healing fuse is connected in series with the package power resistor.
In one embodiment, a self-healing fuse is connected in parallel with the package power resistor.
In one embodiment, the self-healing fuse is a patch-type self-healing fuse;
the power resistor of the plug-in is tightly attached to the upper part of the patch type self-recovery fuse.
In one embodiment, the self-healing fuse is a plug-in type self-healing fuse.
The plug-in power resistor is tightly attached to the upper part or the side of the plug-in type self-recovery fuse.
In one embodiment, the present invention also provides an electrical device comprising an overload protection apparatus.
In one embodiment, when the self-restoring fuse is connected in series with the plug-in power resistor, one end of the plug-in power resistor is connected with one end of the self-restoring fuse, the other end of the plug-in power resistor is used as a power input end to be connected to a power supply end of the electrical equipment, and the other end of the self-restoring fuse is used as a power output end to be connected to the external equipment; or the other end of the plug-in power resistor is used as a power supply output end to be connected to external equipment, and the other end of the self-recovery fuse is used as a power supply input end to be connected to a power supply end of the electrical equipment.
In one embodiment, when the self-healing fuse is connected in parallel with the plug-in power resistor, a connection between one end of the self-healing fuse and the plug-in power resistor is used as a power input end to be connected to a power supply end of the electrical equipment, and a connection between the other end of the self-healing fuse and the plug-in power resistor is used as a power output end.
In one embodiment, the self-recovery fuse is attached to the circuit board when the self-recovery fuse is a patch type self-recovery fuse; the plug-in power resistor is inserted on the circuit board and is tightly attached to the upper part of the self-recovery fuse.
In one embodiment, the self-recovery fuse is inserted on the circuit board when the self-recovery fuse is a plug-in type self-recovery fuse; the plug-in power resistor is plugged on the circuit board and is tightly attached to the upper part or the side of the self-recovery fuse.
The utility model provides an overload protection device and electrical equipment, including self-resuming fuse and the plug-in components power resistance of connecting the self-resuming fuse, the self-resuming fuse is hugged closely to plug-in components power resistance. Therefore, when the current flowing through the circuit abnormally is overlarge or exceeds the trigger current value of the self-recovery fuse, the plug-in power resistor can directly transfer the heat of the plug-in power resistor to the self-recovery fuse. Therefore, the temperature rise caused by triggering the recovery fuse body into a high configuration can be reduced by means of the heat of the plug-in power resistor, so that the protection response time of the self-recovery fuse is shortened. The utility model discloses hug closely plug-in components power resistor in the self-resuming fuse and can give the self-resuming fuse with plug-in components power resistor's direct quick transmission of heat to influence the heat conduction effect on every side in the heat scatters and disappears. And then the utility model discloses overload protection device and electrical equipment of each embodiment can respond fast in time and get into the high resistant state and protect equipment, and simple structure easily realizes, low cost.
Drawings
Fig. 1 shows a schematic structural diagram of an overload protection apparatus according to an embodiment of the present invention;
fig. 2 shows a schematic circuit diagram of an overload protection apparatus according to an embodiment of the present invention;
fig. 3 shows another schematic circuit connection of the overload protection apparatus according to an embodiment of the present invention;
fig. 4 shows another schematic circuit connection of the overload protection apparatus according to an embodiment of the present invention;
fig. 5 shows a side view of the overload protection device according to an embodiment of the invention;
fig. 6 shows another structural side view of the overload protection apparatus in an embodiment of the present invention;
fig. 7 shows another structural side view of the overload protection apparatus in an embodiment of the present invention;
fig. 8 shows a schematic structural diagram of an electrical device according to an embodiment of the present invention.
Detailed Description
Hereinafter, various embodiments of the present invention will be described more fully. The present invention is capable of various embodiments and of being modified and varied therein. However, it should be understood that: there is no intention to limit the scope of the invention to the specific embodiments disclosed herein, but rather, the invention is to cover all modifications, equivalents, and/or alternatives falling within the spirit and scope of the various embodiments of the invention.
Hereinafter, the terms "includes" or "may include" used in various embodiments of the present invention indicate the presence of the disclosed functions, operations, or elements, and do not limit the addition of one or more functions, operations, or elements. Furthermore, as used in various embodiments of the present invention, the terms "comprises," "comprising," "includes," "including," "has," "having" and their derivatives are intended to refer only to the particular feature, number, step, operation, element, component, or combination of the foregoing, and should not be construed as first excluding the existence of, or adding to, one or more other features, numbers, steps, operations, elements, components, or combination of the foregoing.
In various embodiments of the present invention, the expression "at least one of a or/and B" includes any or all combinations of the words listed simultaneously. For example, the expression "a or B" or "at least one of a or/and B" may include a, may include B, or may include both a and B.
Expressions (such as "first", "second", and the like) used in various embodiments of the present invention may modify various constituent elements in various embodiments, but may not limit the respective constituent elements. For example, the above description does not limit the order and/or importance of the elements. The foregoing description is for the purpose of distinguishing one element from another. For example, the first user device and the second user device indicate different user devices, although both are user devices. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, without departing from the scope of various embodiments of the present invention.
It should be noted that: if it is described that one constituent element is "connected" to another constituent element, the first constituent element may be directly connected to the second constituent element, and a third constituent element may be "connected" between the first constituent element and the second constituent element. In contrast, when one constituent element is "directly connected" to another constituent element, it is understood that there is no third constituent element between the first constituent element and the second constituent element.
The term "user" as used in various embodiments of the present invention may indicate a person using an electronic device or a device using an electronic device (e.g., an artificial intelligence electronic device).
The terminology used in the various embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the various embodiments of the invention. Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the various embodiments of the present invention belong. Terms such as those defined in commonly used dictionaries will be interpreted as having a meaning that is the same as a contextual meaning in the related art and will not be interpreted as having an idealized or overly formal meaning unless expressly so defined herein in various embodiments of the present invention.
Referring to fig. 1, in one embodiment, the present invention provides an overload protection apparatus, including: a self-healing fuse F1, and a plug power resistor R1 connected to the self-healing fuse F1.
The card power resistor R1 is attached to the self-healing fuse F1.
The self-recovery fuse is a heat sensitive device, when the current flowing through the self-recovery fuse F1 exceeds the trigger current value too much, the self-recovery fuse F1 can generate heat to form a high resistance state, so that the current is reduced to limit and protect the circuit, or when the self-recovery fuse F1 is influenced by the ambient temperature to enable the temperature of the self body to rise to a set temperature value, the self-recovery fuse F1 can be triggered to enter the high resistance state, after the fault is eliminated, the self-recovery fuse F1 is restored to a low resistance state, so that the circuit is protected, and manual replacement is not needed. The protection function of over-temperature, overload, short circuit and the like of the circuit is realized by utilizing the characteristic.
The self-recovery fuse F1 may be of a plug-in type or a tab type. When the self-recovery fuse F1 is a patch type self-recovery fuse, the plug power resistor R1 is tightly attached above the self-recovery fuse F1; when the self-healing fuse F1 is a plug-type self-healing fuse, the plug power resistor R1 may be closely attached to the self-healing fuse F1. Thus, embodiments of the present invention may enable the self-healing fuse F1 to be in direct contact with the plug-in power resistor R1. Under the normal operating condition, the phenomenon of abnormal heating can not appear in plug-in power resistance R1 and self-resuming fuse F1, when the circuit appears unusually, the too big messenger plug-in power resistance R1 that flows through the circuit can generate heat unusually, and plug-in power resistance R1 can directly transmit self heat to self-resuming fuse F1 this moment to avoid keeping apart the sky and cause the heat to give off to influence surrounding device and calorific loss to the periphery, lead to the invalid problem of heat transfer.
Furthermore, the card power resistor R1 is used to directly transmit its heat to the self-recovery fuse F1 when the current flowing through the circuit exceeds the trigger current value to cause self abnormal heating when a fault such as overload or short circuit occurs, so as to shorten the protection response time of the self-recovery fuse F1 triggered to enter a high configuration. Or, when the current flowing through the circuit is too large due to the circuit abnormality, the plug power resistor R1 is heated abnormally, even if the current is too large at this time and does not exceed the trigger current value of the self-recovery fuse F1, if the self-recovery fuse F1 is affected by the heat of the plug power resistor R1, the self-recovery fuse F1 triggers the circuit to enter the high configuration and protect the circuit in time when the self-body temperature rises to the set temperature value. Namely the embodiment of the utility model provides a can reduce short-circuit current and holistic area load capacity for when appearing the short circuit or transshipping when unusual, can utilize plug-in components power resistance R1's that hug closely heat or plus self recovery fuse F1's heat, make self recovery fuse F1 temperature rise fast to setting for the temperature value and get into high configuration, can in time protect the injury in order to reduce equipment to the circuit.
The utility model discloses overload protection device, thereby the mountable plays the guard action at electrical equipment's feed end or signal output part to electrical equipment and the load that electrical equipment connects. The fuse protector comprises a self-recovery fuse F1 and a plug power resistor R1 connected with the self-recovery fuse F1, wherein the plug power resistor R1 is tightly attached to the self-recovery fuse F1. Therefore, when the current of the circuit abnormally flowing through the circuit is too large or exceeds the trigger current value of the self-recovery fuse F1, the plug power resistor R1 can directly transfer the self-heat to the self-recovery fuse F1. Therefore, the temperature rise triggered into the high configuration from the body of the recovery fuse F1 can be reduced by the heat of the plug power resistor R1, so as to shorten the protection response time of the self-recovery fuse F1. The utility model discloses hug closely plug-in power resistor R1 in self-resuming fuse F1 can give self-resuming fuse F1 with plug-in power resistor R1's direct quick transmission of heat to influence the heat conduction effect on every side in the heat loss. And then the utility model discloses overload protection device can respond fast in time and get into the high resistance state and protect equipment, and simple structure easily realizes, low cost.
Referring to fig. 2 and 3, in one particular embodiment, a self-healing fuse F1 is connected in series with a package power resistor R1.
The embodiment of the utility model provides a can play the effect of current-limiting partial pressure, prevent that the too big voltage that leads to devices such as self-resuming fuse F1 or plug-in components power resistance R1 of electric current from surpassing corresponding rated operating voltage and being damaged. Further, when the current is too large or even exceeds the trigger current value due to faults such as short circuit or overload of the circuit, and the plug-in power resistor R1 and the self-recovery fuse F1 generate heat, the heat of the plug-in power resistor R1 can be utilized to quickly raise the temperature of the self-recovery fuse F1 to a set temperature value to enter a high configuration, so that the protection response time is shortened, and the circuit can be protected in time to reduce the damage to equipment.
Further, when the self-recovery fuse F1 is in the high configuration, the circuit flows a weak current, which generates a certain amount of heat to maintain the high configuration of the fuse. That is, if the overload is removed but the load is not completely cut off and current still flows through the circuit, the self-recovery fuse F1 still maintains the high-impedance state until the current is so weak that the heat generated by the fuse is not enough to maintain the high-group state, and the self-recovery fuse F1 returns to the low-impedance state. If no current flows through the circuit when the overload is removed and the load is completely cut off, the self-healing fuse F1 has no current to maintain a low-resistance state.
The utility model discloses overload protection device, it is long in order in time to protect the circuit when can shortening the protection response of self-resuming fuse F1, simple structure easily realizes, low cost, can play the current-limiting effect simultaneously, and the function is comparatively perfect.
Referring to fig. 4, in one particular embodiment, a self-healing fuse F1 is connected in parallel with a package power resistor R1.
The self-recovery fuse F1 is connected in parallel with the plug-in power resistor R1, and can be realized in a circuit bearing range, so that the overload capacity is properly increased, and the condition that equipment cannot normally operate due to false start of circuit protection caused by interference of other external environmental factors can be prevented.
Further, in an abnormal situation, when the current is too large or exceeds the trigger current value due to a fault such as a short circuit or an overload of the circuit, a part of the current flows through the self-recovery fuse F1, and the other part of the current flows through the package power resistor R1, and both of the currents generate heat. At this time, the heat of the power resistor R1 of the plug-in unit is tightly attached, so that the temperature of the self-recovery fuse F1 is quickly raised to enter a high configuration, the protection response time is shortened, and the circuit can be protected in time.
Further, when the self-recovery fuse F1 is in the high configuration, the circuit flows a weak current, which generates a certain amount of heat to maintain the high configuration of the fuse. As shown in fig. 4, if the overload is removed but the load is not completely cut off, the circuit still has the possibility of a large current, and the self-recovery fuse F1 still maintains the high-impedance state. If the load is not fully disconnected and the circuit still has a small current, the self-recovery fuse F1 recovers to a low resistance state when the current through the self-recovery fuse F1 causes insufficient heat to be generated to maintain the high configuration. If no current flows when the overload is removed and the load is completely cut off, the self-healing fuse F1 has no current to maintain the low-resistance state. Therefore, the self-recovery fuse F1 and the plug power resistor R1 are connected in parallel, so that when the heat generated by the current flowing through the self-recovery fuse F1 is insufficient to maintain a high configuration, the high-resistance state can be maintained by the heat of the plug power resistor R1, and the low-resistance state is recovered after the fault is completely eliminated and no current exists in the circuit.
The utility model discloses overload protection device can enter into high resistant state by the quick response and protect equipment, and simple structure easily realizes, low cost. The protection device can improve the protection performance of the overload protection device while preventing the false start of circuit protection, and avoids the situation that the load is not completely cut off to cause repeated protection and recovery so as to influence the normal use of equipment.
Referring to fig. 5, in one particular embodiment, the self-healing fuse is a patch type self-healing fuse.
The power resistor of the plug-in is tightly attached to the upper part of the patch type self-recovery fuse.
The utility model discloses overload protection device, self-resuming fuse F1 can be patch type self-resuming fuse more optimally, and plug-in components power resistance R1 is hugged closely in patch type self-resuming fuse top. Therefore, the installation is convenient, the heat transferred by the plug-in power resistor R1 is received, the high-resistance state is triggered quickly by the heat of the plug-in power resistor R1 effectively, and the equipment is protected in time.
Referring to fig. 6 and 7, in one particular embodiment, the self-healing fuse F1 is a plug-in type self-healing fuse.
The plug power resistor R1 is closely attached to the top or side of the plug type self-restoring fuse.
The utility model discloses overload protection device, self-resuming fuse F1 can be plug-in components type self-resuming fuse better, and plug-in components power resistance R1 hugs closely in plug-in components type self-resuming fuse top as figure 6, or the side is as figure 7, and the installation position is comparatively nimble, and can be applicable to in the high power circuit. Therefore, the heat transferred by the plug-in power resistor R1 is received while the installation is facilitated, the high-resistance state is rapidly triggered by the heat of the plug-in power resistor R1 effectively, and the equipment is protected in time.
Referring to fig. 1, in one embodiment, the self-healing fuse F1 has a resistance value in the high configuration that is 10-30 times the resistance value of the power resistor R1.
The embodiment of the utility model provides a for improve overload protection device's protective properties, plug-in components power resistance R1's resistance can be far less than the resistance value when self-resuming fuse F1 high configuration. Preferably, the resistance of the self-healing fuse F1 in the high configuration is 10-30 times greater than the resistance of the power resistor R1. Therefore, most of the current in the circuit after the self-recovery fuse F1 is in the high configuration flows through the plug power resistor R1, so that the self-recovery fuse F1 can maintain the high-resistance state by means of the heat of the plug power resistor R1, and the high-resistance state can be maintained by means of the heat of the plug power resistor R1 when the heat generated by the current flowing through the self-recovery fuse F1 is not enough to maintain the high configuration, and the low-resistance state can be recovered after no current exists in the fault complete elimination circuit.
Referring to fig. 8, in one embodiment, the present invention also provides an electrical apparatus including an overload protection device.
It should be noted that, for the specific limitation of the overload protection device 810 according to the embodiment of the present invention, reference may be made to the limitation of the overload protection device according to the above embodiments, and details are not described herein again.
The utility model discloses electrical equipment, including overload protection device 810, thereby its mountable plays the guard action at electrical equipment's supply terminal or signal output part to electrical equipment and the load that electrical equipment is connected. The overload protection device 810 includes a self-recovery fuse and a plug-in power resistor connected to the self-recovery fuse, and the plug-in power resistor is tightly attached to the self-recovery fuse. Therefore, when the circuit is abnormal, the current flowing through the circuit is too large or exceeds the trigger current value of the self-recovery fuse, the plug-in power resistor can directly transfer the heat of the plug-in power resistor to the self-recovery fuse. Therefore, the temperature rise caused by triggering the recovery fuse body into a high configuration can be reduced by means of the heat of the plug-in power resistor, so that the protection response time of the self-recovery fuse is shortened. The embodiment of the utility model provides a hug closely plug-in components power resistance in the self-resuming fuse, can directly transmit the heat of plug-in components power resistance for the self-resuming fuse fast to influence the heat conduction effect on every side in order to avoid the heat to scatter and disappear. And then the utility model discloses electrical equipment can respond fast in time and get into the high resistance state and protect equipment, and simple structure easily realizes, low cost.
Referring to fig. 2 and 3, in a specific embodiment, when the self-healing fuse F1 is connected in series with the card power resistor R1, one end of the card power resistor R1 is connected to one end of the self-healing fuse F1, the other end of the card power resistor R1 is used as a power input terminal to be connected to a power supply terminal VIN of the electrical device, and the other end of the self-healing fuse F1 is used as a power output terminal VOUT to be connected to an external device; or, the other end of the card power resistor R1 is used as the power output terminal VOUT to be connected to an external device, and the other end of the self-healing fuse F1 is used as the power input terminal VIN to be connected to the power supply terminal of the electrical device.
The utility model discloses electrical equipment, thereby the overload protection device wherein is particularly suitable for installing and plays the guard action to electrical equipment and the load that electrical equipment is connected at electrical equipment's power supply end. Meanwhile, the high-resistance state can be quickly responded, the device is protected, the structure is simple, the implementation is easy, the cost is low, the current limiting effect can be achieved, and the function is complete.
Referring to fig. 4, in a specific embodiment, when the self-healing fuse F1 is connected in parallel with the card power resistor R1, the junction of the self-healing fuse F1 and one end of the card power resistor R1 is used as the power input terminal VIN to be connected to the power supply terminal of the electrical device; the other end of the self-recovery fuse F1 and the plug-in power resistor R1 is connected to serve as a power output terminal VOUT.
The utility model discloses electrical equipment, thereby the overload protection device wherein is particularly suitable for installing and plays the guard action to electrical equipment and the load that electrical equipment is connected at electrical equipment's power supply end. Meanwhile, the device can be quickly responded to enter a high-resistance state to protect the device, and the device is simple in structure, easy to implement and low in cost. The protection device can improve the protection performance of the overload protection device while preventing the false start of the circuit protection, and avoids the situation that the circuit is not completely cut off to cause repeated protection and recovery from influencing the normal use of equipment.
In a specific embodiment, the electrical device is any one of a power supply device or a servo driver.
The utility model discloses electrical equipment can but not be restricted to any kind in including power supply unit or servo driver etc to give the power supply of external device when power supply unit, or servo driver control external motor, when meetting trouble such as overload or short circuit, can quick response get into the high resistance state and protect equipment, simple structure easily realizes, low cost.
Referring to fig. 5, in one embodiment, the self-healing fuse F1 is attached to the circuit board a when it is a patch type self-healing fuse; the plug-in power resistor R1 is inserted on the circuit board A and is closely attached above the self-recovery fuse F1.
The utility model discloses overload protection device among electrical equipment, its self recovery fuse F1 can be patch type self recovery fuse better. The utility model discloses overload protection device structure among electrical equipment is comparatively perfect, can make self-resuming fuse F1 and plug-in components power resistance R1 the stable contact on the circuit board, helps making plug-in components power resistance R1 give self-resuming fuse F1 with heat direct transfer to influence the heat conduction effect on every side in order to avoid the heat to scatter and disappear.
Referring to fig. 6 and 7, in one embodiment, the self-healing fuse F1 is inserted on the circuit board a when it is a plug-in type self-healing fuse; the plug-in power resistor R1 is plugged on the circuit board A and is closely attached to the upper side or the side of the self-recovery fuse F1.
The utility model discloses overload protection device in electrical equipment, its self-resuming fuse F1 can be plug-in components type self-resuming fuse. When the fuse is a plug-in type self-recovery fuse, the fuse is plugged on a circuit board A, and a plug-in power resistor R1 is also plugged on the circuit board A and is closely attached to the self-recovery fuse F1 as shown in FIG. 6, or is laterally attached to the self-recovery fuse F1 as shown in FIG. 7. The embodiment of the utility model provides an in can being applicable to high-power circuit and in time playing the guard action.
Those skilled in the art will appreciate that the drawings are merely schematic representations of one preferred implementation scenario and that the blocks or flow diagrams in the drawings are not necessarily required to practice the present invention.
Those skilled in the art will appreciate that the modules in the devices in the implementation scenario may be distributed in the devices in the implementation scenario according to the description of the implementation scenario, or may be located in one or more devices different from the present implementation scenario with corresponding changes. The modules of the implementation scenario may be combined into one module, or may be further split into a plurality of sub-modules.
The sequence numbers of the present invention are only for description, and do not represent the advantages and disadvantages of the implementation scenario. The above disclosure is only a few specific implementation scenarios of the present invention, however, the present invention is not limited thereto, and any changes that can be considered by those skilled in the art shall fall within the protection scope of the present invention.
Claims (10)
1. An overload protection apparatus, comprising: the self-recovery fuse is connected with the plug-in power resistor;
the plug-in power resistor is tightly attached to the self-recovery fuse.
2. The overload protection device of claim 1, wherein the self-healing fuse is in series with the package power resistor.
3. The overload protection device of claim 1, wherein the self-healing fuse is connected in parallel with the package power resistor.
4. The overload protection device of claim 1, wherein the self-healing fuse is a patch-type self-healing fuse;
the plug-in power resistor is tightly attached to the upper part of the patch type self-recovery fuse.
5. The overload protection device of claim 1, wherein the self-healing fuse is a plug-in type self-healing fuse;
the plug-in power resistor is tightly attached to the upper part or the side of the plug-in type self-recovery fuse.
6. An electrical apparatus, characterized in that it comprises an overload protection device according to any one of claims 1 to 5.
7. The electrical device of claim 6, wherein when the self-healing fuse is connected in series with the plug power resistor, one end of the plug power resistor is connected to one end of the self-healing fuse, the other end of the plug power resistor is configured to be connected as a power input terminal to a power supply terminal of the electrical device, and the other end of the self-healing fuse is configured to be connected as a power output terminal to an external device, or the other end of the plug power resistor is configured to be connected as a power output terminal to an external device, and the other end of the self-healing fuse is configured to be connected as a power input terminal to a power supply terminal of the electrical device.
8. The electrical device as claimed in claim 6, wherein when the self-healing fuse is connected in parallel with the plug-in power resistor, a connection between the self-healing fuse and one end of the plug-in power resistor is used as a power input end to be connected to a power supply end of the electrical device, and a connection between the self-healing fuse and the other end of the plug-in power resistor is used as a power output end.
9. The electrical apparatus of claim 6, wherein the self-healing fuse is mounted on a circuit board when the self-healing fuse is a tab-type self-healing fuse; the plug-in power resistor is inserted on the circuit board and is tightly attached to the upper part of the self-recovery fuse.
10. The electrical apparatus of claim 6, wherein the self-healing fuse is plugged onto a circuit board when the self-healing fuse is a plug-in type self-healing fuse; the plug-in power resistor is plugged on the circuit board and is tightly attached to the upper part or the side of the self-recovery fuse.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020081751.1U CN211266449U (en) | 2020-01-14 | 2020-01-14 | Overload protection device and electrical equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020081751.1U CN211266449U (en) | 2020-01-14 | 2020-01-14 | Overload protection device and electrical equipment |
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| Publication Number | Publication Date |
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| CN211266449U true CN211266449U (en) | 2020-08-14 |
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| CN202020081751.1U Active CN211266449U (en) | 2020-01-14 | 2020-01-14 | Overload protection device and electrical equipment |
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| CN (1) | CN211266449U (en) |
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2020
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