CN219163313U - Metal release sheet of surge protector, tripping device and surge protector - Google Patents
Metal release sheet of surge protector, tripping device and surge protector Download PDFInfo
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- CN219163313U CN219163313U CN202222535369.5U CN202222535369U CN219163313U CN 219163313 U CN219163313 U CN 219163313U CN 202222535369 U CN202222535369 U CN 202222535369U CN 219163313 U CN219163313 U CN 219163313U
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Abstract
The embodiment of the application provides a metal release sheet of a surge protector, a tripping device and the surge protector, and relates to the field of over-current protection. Wherein the metal release sheet comprises: a fusing part and a connecting part. The connecting part is connected with the fusing part, the connecting part is also connected with the incoming line connecting plate of the surge protector through the soft connecting wire of the surge protector, and the fusing part is connected with the piezoresistor of the surge protector. When the surge protector works, current flows in from the incoming wire connecting plate, flows into the piezoresistor through the flexible connecting wires, the connecting parts and the fusing parts, and the minimum length of the fusing parts along the first direction is smaller than that of the connecting parts along the first direction. Therefore, when the surge current in the surge protector exceeds the maximum discharge current or the surge protector flows through the short-circuit current, the fusing part can rapidly generate a large amount of heat, so that the fusing part is broken or the low-temperature welding point is melted and broken, and the safety performance of the surge protector is improved.
Description
Technical Field
The embodiment of the application relates to the field of over-current protection, in particular to a metal release sheet of a surge protector, a tripping device and the surge protector.
Background
A surge protector is a commonly used low voltage protection device that is normally in a high impedance state. If the voltage in the power system is too high due to lightning strike induction, capacitive load switching on, inductive load switching off and the like, the power system can be conducted in a very short time, and lightning current or overvoltage is led into the ground through the grounding wire, so that electric equipment in the power system is protected.
In the prior art, as the impedance of the metal release sheet of the surge protector is low and the heating value is small, when the surge current in the surge protector exceeds the maximum discharging current or the surge current in the surge protector is short-circuited instantaneously, the low-temperature welding point cannot be fused in time, the release device of the surge protector cannot be released in time, and the circuit cannot be cut off in time, so that certain potential safety hazards exist.
In order to prevent a short-circuit fault after the failure of the surge protector, a backup protection switch is generally connected in series with the front end of the surge protector. The backup protection switch commonly used at present is a fuse and a breaker, and a tripping device of the surge protector can trip only when a certain action threshold is required to be reached. However, the momentary short-circuit high current of the surge protector or the maximum discharge current in the surge protector sometimes cannot reach the action threshold value of the backup protection switch, so that the backup protection switch cannot play a role in protection.
Disclosure of Invention
In view of the above problems, embodiments of the present application provide a metal release sheet of a surge protector, a trip device, and a surge protector, which overcome or at least partially solve the problem that when a large current flows through an instantaneous short circuit or when a surge current in the surge protector exceeds a maximum discharge current, the metal release sheet of the surge protector cannot timely cause a low-temperature welding point to fuse, and has a certain potential safety hazard.
In a first aspect of embodiments of the present application, there is provided a metal release sheet of a surge protector, the metal release sheet comprising: a fusing part and a connecting part. The connecting part is connected with the fusing part, the connecting part is also connected with the incoming line connecting plate of the surge protector through the soft connecting wire of the surge protector, and the fusing part is connected with the piezoresistor of the surge protector. When the surge protector works, current flows in from the incoming wire connecting plate, flows into the piezoresistor through the flexible connecting wires, the connecting parts and the fusing parts, and the minimum length of the fusing parts along the first direction is smaller than that of the connecting parts along the first direction.
In this embodiment of the application, the metal breaking away from piece includes fusing portion and connecting portion, and the minimum length of fusing portion along the first direction is less than the minimum length of connecting portion along the first direction for the current-carrying cross-sectional area of fusing portion diminishes, has improved the impedance of metal breaking away from the piece. Thus, when the surge current in the surge protector exceeds the maximum discharge current or when the short-circuit current flows in the surge protector, the fusing part can rapidly generate a large amount of heat, so that the fusing part breaks or a low-temperature welding point between the fusing part and the piezoresistor is melted. Then, the tripping device of the surge protector is caused to trip, and the circuit is cut off, so that the safety performance of the surge protector is improved.
In an alternative manner, the fusing part is provided with a missing structure such that a minimum length of the fusing part in the first direction is smaller than a minimum length of the connecting part in the first direction.
Through be equipped with the missing structure on the fusing portion, can make the minimum length of fusing portion along first direction be less than the minimum length of connecting portion along first direction to reduce the current-carrying cross-sectional area of fusing portion, improve the impedance of metal break away from the piece.
In an alternative, the missing structure is disposed between the flexible connection lead and the varistor.
The missing structure is arranged between the flexible connecting wires and the piezoresistor, so that the missing structure is arranged in the current channel, and the purposes of reducing the current carrying cross section area of the fusing part and improving the impedance of the metal separation sheet are achieved.
In an alternative, the cross-sectional area of the missing structure is 55% -85% of the maximum cross-sectional area of the metal release sheet.
By setting the cross-sectional area of the missing structure to be 55% -85% of the maximum cross-sectional area of the metal release sheet, the metal release sheet is not disconnected when the current in the surge protector is within the maximum discharge current; when the surge current in the surge protector exceeds the maximum discharge current or the surge protector flows with short-circuit current, the metal release sheet is disconnected in time.
In an alternative, the number of missing structures is at least one.
Therefore, when a plurality of missing structures are arranged, the current-carrying cross-sectional area of the fusing part can be uniformly reduced, and the impedance of the metal release sheet is improved.
In an alternative, the missing structure is a notch and/or a through hole.
In an alternative, the through-holes include at least one of polygonal through-holes and elliptical through-holes.
According to the embodiment of the application, the shape of the through hole is not limited, the through holes with different shapes can reduce the current-carrying cross section area of the fusing part, and the impedance of the metal separation sheet is improved.
In a second aspect of the embodiments of the present application, there is provided a trip device of a surge protector, including: the push rod, the bump, the first spring and the metal release sheet provided in the first aspect of the embodiments of the present application. The first end of push rod is connected with connecting portion, is provided with the spout on the push rod, and first spring is located the spout. The lug sets up on surge protector's housing, and first spring compression sets up between lug and push rod. When the surge current in the surge protector exceeds the maximum discharge current or the surge protector flows with short-circuit current, the current flows in from the incoming wire connecting plate, and passes through the flexible connecting wire, the connecting part and the fusing part to break the fusing part, and the first spring pushes the push rod to move towards the second direction.
Through setting up push rod, lug and first spring, when fusing portion fracture or low temperature welding point melt fracture, first spring can promote the push rod and remove to the second direction under the restriction of lug, realizes trip gear's dropout.
In a third aspect of the embodiments of the present application, a surge protector is provided, including a surge protector body, an incoming connection board, a flexible connection wire, a varistor, an outgoing connection board, and a trip device provided in the second aspect of the embodiments of the present application. The wire inlet connecting plate is connected with the flexible connecting wires, the flexible connecting wires are connected with the metal release sheets, the metal release sheets are connected with the piezoresistors, and the piezoresistors are connected with the wire outlet connecting plate.
When short-circuit current flows in the surge protector or the surge current in the surge protector exceeds the maximum discharge current, current flows in from the incoming wire connecting plate, and the current passes through the flexible connecting wire, the connecting part and the fusing part to break the fusing part, and the first spring pushes the push rod along the second direction.
In this application embodiment, when flowing short-circuit current or surge current in the surge protector surpasses the biggest discharge current in the surge protector, the electric current flows in from the inlet wire connecting plate, through flexible connection wire, connecting portion and fusing portion, can make fusing portion fracture or make low temperature welding point melt fracture. At this time, the first spring can push the push rod in the second direction under the restriction of the projection.
In an alternative, the surge protector further comprises an indicator and a second spring. The push rod of the tripping device is provided with a second end, and the second end of the push rod extends to the first end of the indicating piece. The first end of the second spring is arranged on the surge protector body, and the second end of the second spring abuts against the second end of the indicating piece. When short-circuit current flows in the surge protector or the surge current in the surge protector exceeds the maximum discharge current, current flows in from the incoming wire connecting plate, and the current passes through the flexible connecting wire, the connecting part and the fusing part to break the fusing part, the first spring pushes the push rod along the second direction, the second end of the push rod is separated from the first end of the indicating piece, and the indicating piece moves in the direction away from the second spring.
When the second end of the push rod is separated from the first end of the indicating piece, the indicating piece moves away from the second spring, so that a user can observe that the surge protector is in a deteriorated state.
The foregoing description is only an overview of the technical solutions of the embodiments of the present application, and may be implemented according to the content of the specification, so that the technical means of the embodiments of the present application can be more clearly understood, and the following detailed description of the present application will be presented in order to make the foregoing and other objects, features and advantages of the embodiments of the present application more understandable.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram illustrating an internal structure of a surge protector according to an embodiment of the present application.
Fig. 2 is a schematic structural diagram of the reverse side of fig. 1 according to an embodiment of the present application.
Fig. 3 is a schematic diagram of an internal structure of a surge protector according to an embodiment of the present application.
Fig. 4 is a schematic diagram illustrating breakage of a fuse portion of a surge protector according to an embodiment of the present application.
Fig. 5 is a schematic diagram of melting of a low-temperature welding point in a surge protector according to an embodiment of the present application.
Reference numerals illustrate:
01. a fusing part; 011. a notch; 012. a through hole; 02. a connection part; 021. a connection hole; 03. soft connecting wires; 04. a wire inlet connecting plate; 05. a piezoresistor; 06. a push rod; 061. a projection; 07. a bump; 08. a first spring; 09. an outgoing line connecting plate; 10. an indicator; 11. a second spring; l, a first direction; m, the second direction.
Detailed Description
For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, based on the embodiments herein, which would be apparent to one of ordinary skill in the art without making any inventive effort, are intended to be within the scope of the present application.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the description of the applications herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.
The terms "comprising" and "having" and any variations thereof in the description and claims of the present application and in the description of the drawings are intended to cover, but not exclude, other matters. The word "a" or "an" does not exclude the presence of a plurality.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the present application. The appearances of the phrase "an embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.
The directional terms appearing in the following description are all directions shown in the drawings and are not intended to limit the specific structures of the metal release plate, trip device and surge protector of a surge protector of the present application. For example, in the description of the present application, the terms "length," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," and the like indicate an orientation or positional relationship based on that shown in the drawings, merely for convenience of description of the present application and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus are not to be construed as limiting the present application.
Furthermore, the expressions of directions of indication such as L-direction and M-direction for explaining the operation and construction of the respective members of the surge protector, trip device and surge protector of one kind of the surge protector of the present embodiment are not absolute but relative, and although these indications are proper when the respective members of the surge protector are in the positions shown in the drawings, these directions should be interpreted differently when these positions are changed to correspond to the changes.
Furthermore, the terms first, second and the like in the description and in the claims of the present application or in the above-described figures, are used for distinguishing between different objects and not for describing a particular sequential order, and may be used to expressly or implicitly include one or more such features.
In the description of the present application, unless otherwise indicated, the meaning of "plurality" means two or more (including two), and similarly, "plural sets" means two or more (including two).
In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "coupled" are to be construed broadly, e.g., the terms "connected" or "coupled" of a mechanical structure may refer to a physical connection, e.g., the physical connection may be a fixed connection, e.g., by a fastener, such as a screw, bolt, or other fastener; the physical connection may also be a detachable connection, such as a snap-fit or snap-fit connection; the physical connection may also be an integral connection, such as a welded, glued or integrally formed connection. "connected" or "connected" of circuit structures may refer to physical connection, electrical connection or signal connection, for example, direct connection, i.e. physical connection, or indirect connection through at least one element in the middle, so long as circuit communication is achieved, or internal communication between two elements; signal connection may refer to signal connection through a medium such as radio waves, in addition to signal connection through a circuit. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art in a specific context.
Referring to fig. 1 and fig. 2, fig. 1 is a schematic diagram illustrating an internal structure of a surge protector according to an embodiment of the present application. Fig. 2 is a schematic structural diagram of the reverse side of fig. 1 according to an embodiment of the present application.
As shown in fig. 1 and 2, the metal release sheet includes: a fusing part 01 and a connecting part 02. The connection portion 02 and the fusing portion 01 may be connected, for example, the connection portion 02 may be welded to the fusing portion 01, or the connection portion 02 and the fusing portion 01 may be integrally formed. The connection part 02 is also connected with the wire inlet connection plate 04 of the surge protector through the flexible connection wire 03 of the surge protector, and the fusing part 01 is connected with the piezoresistor 05 of the surge protector. When the surge protector works, current flows in from the incoming wire connecting plate 04, and flows into the piezoresistor 05 through the flexible connecting wire 03, the connecting part 02 and the fusing part 01. The minimum length of the fusing part 01 in the first direction L is smaller than the minimum length of the connecting part 02 in the first direction L.
In one possible manner, in order to make the minimum length of the fusing part 01 in the first direction L smaller than the minimum length of the connection part 02 in the first direction L, a missing structure may be provided at the fusing part 01.
By providing the missing structure on the fusing part 01, the minimum length of the fusing part 01 along the first direction L can be smaller than the minimum length of the connecting part 02 along the first direction L, so as to reduce the current-carrying cross-sectional area of the fusing part 01 and improve the impedance of the metal release sheet.
In practical application, the missing structure can be arranged between the flexible connection wire 03 and the piezoresistor 05, so that when the surge protector works, current can flow in from the incoming connection plate 04, and after passing through the missing structure of the flexible connection wire 03, the connection part 02 and the fusing part 01, the current flows into the piezoresistor 05, so that the missing structure is arranged in a current channel, the current carrying cross-sectional area of the fusing part 01 is reduced, and the impedance of the metal separation sheet is improved.
In an alternative, the number of missing structures is at least one.
Thus, when a plurality of missing structures are provided, the current-carrying cross-sectional area of the fusing part 01 can be uniformly reduced, and the resistance of the metal release sheet can be improved.
Specifically, the missing structure may be a notch and/or a through hole.
For example, as shown in fig. 1, the fusing part 01 is provided with a through hole 012 such that the minimum length of the fusing part 01 in the first direction L is smaller than the minimum length of the connecting part 02 in the first direction L.
In practical use, a plurality of through holes 012 may be provided to uniformly reduce the current-carrying cross-sectional area of the fuse portion 01 and to increase the resistance of the metal release sheet. The plurality of through holes 012 may be distributed on the metal release sheet at intervals or in an array.
The shape and size of the plurality of through holes 012 may be the same, partially the same, or different from each other. For example, the through-hole 012 includes at least one of a polygonal through-hole and an elliptical through-hole. In the embodiment of the present application, the shape of the through hole 012 is not limited, and through holes 012 with different shapes can reduce the current-carrying cross-sectional area of the fusing part 01 and improve the impedance of the metal release sheet.
It can be seen that, by providing the through hole 012 on the fusing part 01, the minimum length of the fusing part 01 along the first direction L can be made smaller than the minimum length of the connecting part 02 along the first direction L, so that the current-carrying cross-sectional area of the fusing part 01 can be reduced, and the impedance of the metal release sheet can be improved.
For example, as shown in fig. 3, a notch 011 is provided on the fusing part 01, where fig. 3 is a schematic diagram of an internal structure of a surge protector according to an embodiment of the present application.
In practical application, a plurality of notches 011 may be provided on the fusing part 01, and the shape of the notches 011 may be regular or irregular, which is not limited in the embodiment of the present application, as long as the minimum length of the fusing part 01 provided with the notches 011 along the first direction L is smaller than the minimum length of the connecting part 02 along the first direction L. By providing the notch 011 in the fuse portion 01, the current-carrying cross-sectional area of the fuse portion 01 can be reduced, and the resistance of the metal release sheet can be improved.
It should be noted that, under the condition that the space of the metal release sheet allows, the fusing part 01 can be provided with a plurality of notches 011 with different shapes and a plurality of through holes 012 with different shapes at the same time, so as to reduce the current-carrying cross-sectional area of the fusing part 01 and improve the impedance of the metal release sheet.
In this embodiment of the application, the metal separation sheet includes the fusing part 01 and the connecting part 02, and the minimum length of the fusing part 01 along the first direction L is smaller than the minimum length of the connecting part 02 along the first direction L, so that the current-carrying cross-sectional area of the fusing part 01 becomes smaller, and the impedance of the metal separation sheet is improved. In this way, when a short-circuit current flows in the surge protector or when the surge current in the surge protector exceeds the maximum discharge current, the fusing part 01 can rapidly generate a large amount of heat, resulting in breakage of the fusing part 01 as shown in fig. 4 or melting of a low-temperature welding point between the fusing part 01 and the varistor 05 as shown in fig. 5. For example, when a short-circuit current or a surge current flowing therethrough is large, for example, when the current exceeds 1000 amperes, breakage of the fusing part 01 may be caused; when the short circuit current or the surge current flowing therethrough is small, for example, the current is less than 1000 amperes, the low temperature welding point may be caused to melt. Then, the tripping device of the surge protector is caused to trip, and the circuit is cut off, so that the safety performance of the surge protector is improved.
In one embodiment, to ensure that the metal release sheet is able to withstand a certain surge current without breaking when the surge protector is operating within the maximum discharge current, the area of the notch 011 or through hole 012 may be set.
For example, the cross-sectional area of the missing structure may be set to be 55% -85% of the maximum cross-sectional area of the metal release sheet. The maximum cross-sectional area of the metal release sheet refers to the cross-sectional area of the metal release sheet along the width direction, and the maximum cross-sectional area is calculated by multiplying the width of the metal release sheet by the thickness of the metal release sheet, wherein the width direction of the metal release sheet is consistent with the first direction L, and the length direction of the metal release sheet is consistent with the second direction M. In practical applications, the cross-sectional area of the notch 011 or the cross-sectional area of the through hole 012 may be set according to the magnitude of the surge current to be achieved by the surge protector, which is not particularly limited herein.
For example, when the metal release sheet is required to withstand an inrush current of 65 Kiloamperes (KA), the residual cross-sectional area of the metal release sheet should reach 1.2 square millimeters (mm) 2 ) At this time, the cross-sectional area of the notched 011 portion of the metal release sheet or the cross-sectional area of the through hole 012 may be 1.8mm 2 The maximum cross-sectional area of the metal release sheet may be 3mm 2 The cross-sectional area of the portion of the notch 011 or the cross-sectional area of the through hole 012 is 60% of the maximum cross-sectional area of the metal release sheet. When the metal release sheet needs to bear 40KA surge current, the residual cross section area of the metal release sheet should reach 1mm 2 At this time, the cross-sectional area of the notched 011 portion of the metal release sheet or the cross-sectional area of the through hole 012 may be 0.25mm 2 The maximum cross-sectional area of the metal release sheet may be 1.25mm 2 The cross-sectional area of the portion of the notch 011 or the cross-sectional area of the through hole 012 is 80% of the maximum cross-sectional area of the metal release sheet.
Specifically, the width of the metal release sheet may be 6 millimeters (mm), the thickness of the metal release sheet may be 0.5mm, and the maximum cross-sectional area of the metal release sheet may be 3mm 2 . A square through hole 012 is arranged on the metal release sheet, the width of the square through hole 012 can be 3.6mm, and the length can be 1mm, so that the cross section area of the through hole 012 reaches 1.8mm 2 The residual cross-sectional area of the metal release sheet reaches 1.2mm 2 The cross-sectional area of the through-hole 012 is 60% of the maximum cross-sectional area of the metal release sheet. Thus, when the current in the surge protector is within 65KA, which is the maximum discharge current, the metal release sheet is not disconnected; when the surge current in the surge protector exceeds the maximum discharge current or the surge protector flows with short-circuit current, the metal release sheet is disconnected in time.
As shown in fig. 1 and 2, some embodiments of the present application further provide a trip device of a surge protector, including: pushrod 06, tab 07, first spring 08, and metal release tab provided in the above embodiments.
Wherein, the first end of push rod 06 is connected with connecting portion 02, is provided with the spout on push rod 06, for example, the spout can be along second direction M setting, and first spring 08 is located the spout. The projection 07 is arranged on the housing of the surge protector, and the first spring 08 is arranged between the projection 07 and the push rod 06 in a compressed manner. When the surge current in the surge protector exceeds the maximum discharge current or when the short-circuit current flows in the surge protector, the current flows in from the wire inlet connection plate 04, passes through the flexible connection wire 03, the connection part 02 and the fusing part 01, so that the fusing part 01 breaks, and the first spring 08 pushes the push rod 06 to move towards the second direction M.
In one example, when the first end of the push rod 06 is connected to the connection portion 02, a protrusion 061 may be provided at the first end of the push rod 06, and a connection hole 021 may be provided at the connection portion 02, and the connection between the first end of the push rod 06 and the connection portion 02 may be achieved by fixing the protrusion 061 in the connection hole 021.
In this embodiment, by setting the push rod 06, the bump 07 and the first spring 08, when the fusing part 01 breaks or the low-temperature welding point melts and breaks, the first spring 08 can push the push rod 06 to move towards the second direction M under the limitation of the bump 07, so as to implement the trip of the trip device.
In another embodiment of the present application, as shown in fig. 1-5, a surge protector is further provided, which includes a surge protector body, an incoming connection board 04, a flexible connection wire 03, a varistor 05, an outgoing connection board 09, and the trip device provided in the foregoing embodiment. The incoming wire connecting plate 04 is connected with the flexible connecting wires 03, the flexible connecting wires 03 are connected with metal release sheets, the metal release sheets are connected with the piezoresistors 05, and the piezoresistors 05 are connected with the outgoing wire connecting plate 09.
When the surge protector works normally, the piezoresistor 05 is conducted, and current is led into the ground wire from the incoming wire connecting plate 04 to the outgoing wire connecting plate 09, so that the protection effect on a circuit system is achieved.
When the surge current in the surge protector exceeds the maximum discharge current or when the short-circuit current flows in the surge protector, the current flows in from the wire inlet connection plate 04, passes through the flexible connection wire 03, the connection portion 02 and the fusing portion 01, breaks the fusing portion 01, and the first spring 08 pushes the push rod 06 in the second direction M.
In this embodiment of the present application, when the surge current in the surge protector exceeds the maximum discharge current, or when the surge protector flows short-circuit current, the current flows from the incoming connection board 04, passes through the flexible connection wire 03, the connection portion 02 and the fusing portion 01, and may break the fusing portion 01 or melt and break the low-temperature welding point. At this time, the first spring 08 can push the push rod 06 in the second direction M under the restriction of the projection 07.
In practice, the surge protector may further comprise an indicator 10 and a second spring 11. Wherein the push rod 06 of the trip device has a second end, the second end of the push rod 06 extending to the first end of the indicator 10. The first end of the second spring 11 is arranged on the surge protector body, and the second end of the second spring 11 pushes against the second end of the indicator 10. When a short-circuit current flows in the surge protector or when the surge current in the surge protector exceeds the maximum discharge current, the current flows in from the incoming connection plate 04, passes through the flexible connection wire 03, the connection part 02 and the fusing part 01, breaks the fusing part 01, and the first spring 08 pushes the push rod 06 in the second direction M, so that the second end of the push rod 06 is separated from the first end of the indicator 10, and the indicator 10 moves away from the second spring 11.
When the second end of push rod 06 is disengaged from the first end of indicator 10, indicator 10 may be moved away from second spring 11, facilitating the user's observation that the surge protector is already in a degraded state.
Specifically, two areas with different colors can be provided on the indicator 10 to indicate whether the surge protector is deteriorated, and a user can know whether the surge protector in use is deteriorated by observing the color of the indicator 10, so that a new surge protector can be replaced in time to protect the circuit system.
By way of example, the indicator 10 may include a red area for indicating that the surge protector in use is not degraded and a green area for indicating that the surge protector in use has been degraded.
Based on this, a window area may be provided at a position of the surge protector body corresponding to the indicator 10. The user can view the indicator 10 through the window area. When the surge protector is in a normal operating state, a user can observe the green area of the indicator 10 through the window area; when the surge protector is in a deteriorated state, the indicator 10 moves away from the second spring 11, and the user can observe the red area of the indicator 10 through the window area.
Those skilled in the art will appreciate that while some embodiments herein include certain features that are included in other embodiments, combinations of features of different embodiments are meant to be within the scope of the present application and form different embodiments. For example, in the claims, any of the claimed embodiments may be used in any combination.
The above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the corresponding technical solutions.
Claims (10)
1. A metal release sheet of a surge protector, the metal release sheet comprising: a fusing part and a connecting part, wherein,
the connecting part is connected with the fusing part and is also connected with an incoming line connecting plate of the surge protector through a soft connecting wire of the surge protector;
the fusing part is connected with the piezoresistor of the surge protector;
when the surge protector works, current flows in from the incoming wire connecting plate, flows into the piezoresistor through the flexible connecting wires, the connecting portion and the fusing portion, and the minimum length of the fusing portion along the first direction is smaller than that of the connecting portion along the first direction.
2. The metal release sheet according to claim 1, wherein the fusing part is provided with a missing structure such that a minimum length of the fusing part in the first direction is smaller than a minimum length of the connecting part in the first direction.
3. The metal release sheet of claim 2, wherein the missing structure is disposed between the flexible connection lead and the varistor.
4. The metal release sheet of claim 2, wherein the cross-sectional area of the missing structure is 55% -85% of the maximum cross-sectional area of the metal release sheet.
5. The metal release sheet according to claim 2, wherein the number of missing structures is at least one.
6. The metal release sheet according to claim 2, wherein the missing structure is a notch and/or a through hole.
7. The metal release sheet of claim 6, wherein the through-holes comprise at least one of polygonal through-holes and elliptical through-holes.
8. A trip device for a surge protector comprising a push rod, a bump, a first spring, and the metal release sheet of any one of claims 1-7;
the first end of the push rod is connected with the connecting part, a chute is arranged on the push rod, and the first spring is positioned in the chute;
the lug is arranged on the housing of the surge protector, and the first spring is arranged between the lug and the push rod in a compressed mode;
when the surge current in the surge protector exceeds the maximum discharge current or the surge protector flows through short-circuit current, the current flows in from the incoming wire connecting plate, passes through the flexible connecting wires, the connecting part and the fusing part, so that the fusing part is broken, and the first spring pushes the push rod to move towards the second direction.
9. A surge protector is characterized by comprising a surge protector body, an incoming connection plate, a flexible connection wire, a piezoresistor, an outgoing connection plate and the tripping device of claim 8, wherein,
the wire inlet connecting plate is connected with the flexible connecting wires, the flexible connecting wires are connected with the metal separation sheets, the metal separation sheets are connected with the piezoresistors, and the piezoresistors are connected with the wire outlet connecting plate;
when short-circuit current flows in the surge protector or the surge current in the surge protector exceeds the maximum discharge current, the current flows in from the incoming wire connecting plate, passes through the flexible connecting wire, the connecting part and the fusing part, so that the fusing part is broken, and the first spring pushes the push rod along the second direction.
10. The surge protector of claim 9, further comprising an indicator and a second spring, wherein,
the push rod of the trip device has a second end that extends to the first end of the indicator;
the first end of the second spring is arranged on the surge protector body, and the second end of the second spring props against the second end of the indicator;
when short-circuit current flows in the surge protector or the surge current in the surge protector exceeds the maximum discharge current, the current flows in from the incoming wire connecting plate, passes through the flexible connecting wire, the connecting part and the fusing part to break the fusing part, the first spring pushes the push rod along the second direction to enable the second end of the push rod to be separated from the first end of the indicator, and the indicator moves in a direction away from the second spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222535369.5U CN219163313U (en) | 2022-09-22 | 2022-09-22 | Metal release sheet of surge protector, tripping device and surge protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222535369.5U CN219163313U (en) | 2022-09-22 | 2022-09-22 | Metal release sheet of surge protector, tripping device and surge protector |
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| Publication Number | Publication Date |
|---|---|
| CN219163313U true CN219163313U (en) | 2023-06-09 |
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ID=86645165
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222535369.5U Active CN219163313U (en) | 2022-09-22 | 2022-09-22 | Metal release sheet of surge protector, tripping device and surge protector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219163313U (en) |
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