CN116093913A - Surge protection device - Google Patents

Surge protection device Download PDF

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Publication number
CN116093913A
CN116093913A CN202111309889.8A CN202111309889A CN116093913A CN 116093913 A CN116093913 A CN 116093913A CN 202111309889 A CN202111309889 A CN 202111309889A CN 116093913 A CN116093913 A CN 116093913A
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CN
China
Prior art keywords
module
sub
surge protection
discharging
decoupling
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CN202111309889.8A
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Chinese (zh)
Inventor
沈能武
郑传啸
王炎林
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SHENZHEN RUILONGYUAN ELECTRONICS CO Ltd
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SHENZHEN RUILONGYUAN ELECTRONICS CO Ltd
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Priority to CN202111309889.8A priority Critical patent/CN116093913A/en
Publication of CN116093913A publication Critical patent/CN116093913A/en
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
    • H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
    • H02H9/06—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage using spark-gap arresters

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Abstract

The embodiment of the application provides a surge protection device, which comprises: the device comprises a first protection module, a primary surge protection module, a secondary surge protection module, a voltage stabilizing module, a first decoupling module and a second decoupling module; the first end of the first discharging sub-module is connected with the second discharging sub-module and the third discharging sub-module respectively; the first discharging electronic module is connected with the first protection module; the first protection module is used for connecting with a live wire; the second discharging submodule is connected with a zero line; the third discharging submodule is connected with a ground wire; the first end and the second end of the voltage stabilizing module are respectively connected with the first end and the second end of the first electronic releasing module; the first end and the second end of the first decoupling module are respectively connected with the second end of the voltage stabilizing module and the first end of the secondary surge protection module, the second end of the secondary surge protection module is connected with the first end of the second decoupling module, and the second end of the second decoupling module is connected with the second end of the second discharging sub-module. Thus, the surge protection device can effectively inhibit and eliminate surge voltage and improve the surge protection effect.

Description

Surge protection device
Technical Field
The application relates to the field of electronic technology, in particular to a surge protection device.
Background
In the prior art, in order to prevent the electronic device from being affected by a surge, a surge protection device is generally provided for the electronic device. The source of the surge is divided into an external cause and an internal cause, wherein the external cause can be a lightning cause, and the internal cause can be start-stop and failure of the electrical equipment. The existing surge protection device generally provides primary surge protection, cannot process residual voltage, and causes the problems of insufficient safety and lower protection effect.
Disclosure of Invention
In view of this, embodiments of the present application provide a surge protection device.
In a first aspect, embodiments of the present application provide a surge protection device, comprising: the device comprises a first protection module, a primary surge protection module, a secondary surge protection module, a voltage stabilizing module, a first decoupling module and a second decoupling module;
the first-stage surge protection module comprises a first discharging electronic module, a second discharging electronic module and a third discharging electronic module, wherein the first end of the first discharging electronic module is respectively connected with the first end of the second discharging electronic module and the first end of the third discharging electronic module; the second end of the first discharging sub-module is connected with the first end of the first protection module; the second end of the first protection module is used for connecting with a live wire; the second end of the second discharging sub-module is used for being connected with a zero line; the second end of the third discharging electronic module is used for being connected with a ground wire;
the first end of the voltage stabilizing module is connected with the first end of the first amplifying sub-module, and the second end of the voltage stabilizing module is connected with the second end of the first amplifying sub-module;
the first end of the first decoupling module is connected with the second end of the voltage stabilizing module, the second end of the first decoupling module is connected with the first end of the secondary surge protection module, the second end of the secondary surge protection module is connected with the first end of the second decoupling module, and the second end of the second decoupling module is connected with the second end of the second discharging module.
Optionally, the second discharging submodule includes a first piezoresistor and a second piezoresistor, and a first parallel end and a second parallel end of the parallel connection of the first piezoresistor and the second piezoresistor are the first end and the second end of the second discharging submodule respectively:
the third discharging submodule comprises a third piezoresistor and a fourth piezoresistor, and a first parallel end and a second parallel end of the third piezoresistor and the fourth piezoresistor which are connected in parallel are respectively the first end and the second end of the third discharging submodule.
Optionally, the first discharging submodule includes a gas discharging tube, a first end of the gas discharging tube is the first end of the first discharging submodule, and a second end of the gas discharging tube is the second end of the first discharging submodule.
Optionally, the secondary surge protection module includes a short-circuit prevention sub-module and a low residual voltage sub-module, wherein a first end of the short-circuit prevention sub-module is the first end of the secondary surge protection module;
the second end of the short-circuit prevention sub-module is connected with the first end of the low-residual-voltage sub-module;
the second end of the low residual voltage sub-module is the second end of the secondary surge protection module.
Optionally, the short-circuit prevention sub-module comprises a protective tube, a first end of the protective tube is the first end of the short-circuit prevention sub-module, a second end of the protective tube is the second end of the short-circuit prevention sub-module,
the low residual voltage sub-module comprises a fifth piezoresistor and a semiconductor discharge tube, wherein the first end of the fifth piezoresistor is the first end of the low residual voltage sub-module, and the first end of the fifth piezoresistor is connected with the second end of the protective tube;
the second end of the fifth piezoresistor is connected with the first end of the semiconductor discharge tube, and the second end of the semiconductor discharge tube is the second end of the low residual voltage sub-module.
Optionally, the voltage stabilizing module includes a transient diode and a first resistor, a first end of the first resistor is the first end of the voltage stabilizing module, a second end of the first resistor is connected with the first end of the transient diode, and a second end of the transient diode is the second end of the voltage stabilizing module.
Optionally, the first protection module is a thermal fuse, a first end of the thermal fuse is the first end of the first protection module, and a second end of the thermal fuse is the second end of the first protection module.
Optionally, the first decoupling module is a first inductor, a first end of the first inductor is the first end of the first decoupling module, and a second end of the first inductor is the second end of the first decoupling module;
the second decoupling module is a second inductor, a first end of the second inductor is the first end of the second decoupling module, and a second end of the second inductor is the second end of the second decoupling module.
Optionally, the surge protection device further comprises: the first prompting module comprises a first light emitting diode and a second resistor;
the first end of the first light-emitting secondary light is connected with the first end of the anti-short-circuit sub-module, and the second end of the first light-emitting secondary light is connected with the first end of the second resistor;
and the second end of the second resistor is connected with the second end of the low residual voltage sub-module.
Optionally, the surge protection device further comprises: the second prompting module comprises a second light emitting diode and a third resistor, wherein the first end of the second light emitting diode is connected with the second end of the short-circuit prevention sub-module, the second end of the second light emitting diode is connected with the first end of the third resistor, and the second end of the third resistor is connected with the second end of the low residual voltage sub-module.
The surge protection device provided by the application enables the low residual voltage of the live wire L and the zero line N to be lower than 600V through the primary surge protection module, the low residual voltage is controlled by using the structures of the fifth piezoresistor and the semiconductor discharge tube, the residual current of the primary surge protection module is controlled by using the first decoupling module and the second decoupling module to be in a bearing range of the semiconductor discharge tube, and the leakage current of the fifth piezoresistor in a power frequency state is smaller than the turn-off current of the semiconductor discharge tube so that the secondary surge protection module is recovered to a high-resistance state after surge. Thus, the surge protection device can effectively inhibit and eliminate surge voltage and improve the surge protection effect.
Drawings
In order to more clearly illustrate the technical solutions of the present application, the drawings that are required for the embodiments will be briefly described, it being understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope of protection of the present application. Like elements are numbered alike in the various figures.
Fig. 1 shows a schematic structural diagram of a surge protection device according to an embodiment of the present application;
fig. 2 shows another schematic structural view of a surge protection device provided in an embodiment of the present application;
fig. 3 shows another schematic structural view of a surge protection device provided in an embodiment of the present application;
fig. 4 shows a schematic view of an effect of the surge protection device according to the embodiment of the present application.
Detailed Description
The following description of the embodiments of the present application will be made clearly and completely with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments.
The components of the embodiments of the present application, which are generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present application, as provided in the accompanying drawings, is not intended to limit the scope of the application, as claimed, but is merely representative of selected embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present application without making any inventive effort, are intended to be within the scope of the present application.
In the following, the terms "comprises", "comprising", "having" and their cognate terms may be used in various embodiments of the present application are intended only to refer to a particular feature, number, step, operation, element, component, or combination of the foregoing, and should not be interpreted as first excluding the existence of or increasing the likelihood of one or more other features, numbers, steps, operations, elements, components, or combinations of the foregoing.
Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.
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 various embodiments of this application belong. The terms (such as those defined in commonly used dictionaries) will be interpreted as having a meaning that is identical to the meaning of the context in the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein in connection with the various embodiments.
The present embodiment provides a surge protection device.
Referring to fig. 1, 2 and 3, the surge protection device of the present embodiment includes:
the protection device comprises a first protection module 11, a primary surge protection module 1, a secondary surge protection module 2, a voltage stabilizing module 14, a first decoupling module 17 and a second decoupling module 16;
the primary surge protection module 1 comprises a first discharge sub-module 12, a second discharge sub-module 13 and a third discharge sub-module 15, wherein a first end of the first discharge sub-module 12 is respectively connected with a first end of the second discharge sub-module 13 and a first end of the third discharge sub-module 15; the second end of the first discharging sub-module 12 is connected with the first end of the first protection module 11; the second end of the first protection module 11 is used for connecting with an input end L_IN of a live wire; the second end of the second discharging sub-module 13 is used for connecting with the input end N_IN of the zero line; a second end of the third discharging sub-module 15 is used for being connected with a ground line PE;
a first end of the voltage stabilizing module 14 is connected with the first end of the first amplifier sub-module 12, and a second end of the voltage stabilizing module 14 is connected with the second end of the first amplifier sub-module 12;
the first end of the first decoupling module 17 is connected with the second end of the voltage stabilizing module 14, the second end of the first decoupling module 17 is connected with the first end of the secondary surge protection module 2, the second end of the secondary surge protection module 2 is connected with the first end of the second decoupling module 16, and the second end of the second decoupling module 16 is connected with the second end of the second discharging module 13.
IN this embodiment, when a surge is generated between the input terminal l_in of the live wire and the input terminal n_in of the neutral wire, the equivalent built-IN of the second discharging module 13 is rapidly reduced, a first starting voltage is generated, so that the voltage separated by the voltage stabilizing module 14 is rapidly increased, the voltage loaded at two ends of the first discharging module 12 is increased, when the voltage loaded at two ends of the first discharging module 12 is increased to be greater than the maximum voltage which can be borne by the first discharging module 12, the first discharging module 12 enters a discharging state to release electric quantity, the two ends of the first discharging module 12 generate arc voltage, and the voltage obtained by subtracting the arc voltage from the surge voltage is loaded on the second discharging module 13 to enable the second discharging module 13 to be conducted, so that the surge protection between the live wire and the neutral wire is realized.
When a surge is generated between the input end L_IN of the live wire and the ground wire PE, the equivalent built-IN of the third discharge module 15 is rapidly reduced, a second starting voltage is generated, the voltage obtained by the voltage stabilizing module 14 is rapidly increased, the voltage loaded at two ends of the first discharge module 12 is increased, when the voltage loaded at two ends of the first discharge module 12 is increased to be larger than the maximum voltage which can be borne by the first discharge module 12, the first discharge module 12 enters a discharge state to release electric quantity, arc voltage is generated at two ends of the first discharge module 12, the voltage obtained by subtracting the arc voltage from the surge voltage is loaded on the third discharge module 15, so that the third discharge module 15 is conducted, and surge protection between the live wire and the ground wire is realized.
Similarly, when a surge is generated between the input end n_in of the neutral line and the ground line PE, the equivalent built-IN of the second and third discharge sub-modules 13 and 15 is rapidly reduced, so that the second and third discharge sub-modules 13 and 15 are IN a conducting state, the surge between the neutral line and the ground line PE is controlled IN voltage, and redundant current is absorbed, thereby realizing surge protection between the neutral line and the ground line.
In this embodiment, the first and second discharge sub-modules 12 and 13 form a primary surge protection module of L-N. The first and third discharge sub-modules 12 and 15 constitute a primary surge protection module of L-PE. The second discharging sub-module 13 and the third discharging sub-module 15 form a primary surge protection module of N-PE.
In this embodiment, the low residual voltage of the surge between the live wire and the zero wire passing through the primary surge protection module 1 is less than 600V, and the first decoupling module 17 and the second decoupling module 16 limit the low residual voltage, so that the residual current is controlled within the range that the secondary surge protection module can bear.
Thus, a two-port serial surge protection structure can be formed, and the two-stage surge protection structure can provide higher safety protection effect.
Optionally, the second discharging sub-module 13 includes a first varistor VR1 and a second varistor VR2, and a first parallel end and a second parallel end of the parallel connection of the first varistor VR1 and the second varistor VR2 are the first end and the second end of the second discharging sub-module 13 respectively:
the third discharging sub-module 15 includes a third varistor VR3 and a fourth varistor VR4, and a first parallel end and a second parallel end of the third varistor VR3 and the fourth varistor VR4 connected in parallel are the first end and the second end of the third discharging sub-module 15, respectively.
Optionally, the first discharge sub-module 12 includes a gas discharge tube G1, a first end of the gas discharge tube G1 is the first end of the first discharge sub-module 12, and a second end of the gas discharge tube G1 is the second end of the first discharge sub-module.
In the present embodiment, the gas discharge tube G1 may be a ceramic gas discharge tube.
Optionally, the secondary surge protection module 2 includes a short-circuit prevention sub-module 21 and a low residual voltage sub-module 22, and a first end of the short-circuit prevention sub-module 21 is the first end of the secondary surge protection module 2;
the second end of the short-circuit prevention sub-module 21 is connected with the first end of the low residual voltage sub-module 22;
the second end of the low residual voltage sub-module 22 is the second end of the secondary surge protection module.
Optionally, the anti-short sub-module 21 includes a protective tube F2, a first end of the protective tube F2 is the first end of the anti-short sub-module 21, a second end of the protective tube F2 is the second end of the anti-short sub-module 21,
the low residual voltage sub-module 22 includes a fifth varistor VR5 and a semiconductor discharge tube TV1, wherein a first end of the fifth varistor is the first end of the low residual voltage sub-module 22, and the first end of the fifth varistor VR5 is connected with the second end of the fuse tube F2;
a second end of the fifth varistor VR5 is connected to the first end of the semiconductor discharge tube TV1, and the second end of the semiconductor discharge tube TV1 is the second end of the low residual voltage sub-module 22.
In this embodiment, the protective tube F2 is a short-circuit preventing device of the secondary surge protection module 2, and plays a role in preventing short-circuit. The semiconductor discharge tube TV1 is an overvoltage protection device, is manufactured by using a thyristor principle, is triggered to conduct and discharge by means of breakdown current of PN junction, and can flow large surge current or pulse current. The breakdown voltage range of the semiconductor discharge tube TV1 constitutes the range of overvoltage protection.
Optionally, the voltage stabilizing module 14 includes a transient diode D1 and a first resistor R1, a first end of the first resistor R1 is the first end of the voltage stabilizing module 14, a second end of the first resistor R1 is connected with the first end of the transient diode D1, and a second end of the transient diode D1 is the second end of the voltage stabilizing module 14.
In this embodiment, the function of the first resistor R1 is voltage division.
Optionally, the first protection module 11 is a thermal fuse F1, a first end of the thermal fuse F1 is the first end of the first protection module 11, and a second end of the thermal fuse F1 is the second end of the first protection module 11.
In this embodiment, the temperature fuse may also be referred to as a thermal trip.
Optionally, the first decoupling module 17 is a first inductor L1, a first end of the first inductor L1 is the first end of the first decoupling module 17, and a second end of the first inductor L1 is the second end of the first decoupling module 17;
the second decoupling module 16 is a second inductor L2, a first end of the second inductor L2 is the first end of the second decoupling module 16, and a second end of the second inductor L2 is the second end of the second decoupling module 16.
Optionally, the surge protection device further comprises: the first prompt module 31, the first prompt module 31 includes a first light emitting diode LED1 and a second resistor R2;
a first end of the first light emitting diode 1 is connected with the first end of the anti-short sub-module 21, and a second end of the first light emitting diode 1 is connected with a first end of the second resistor R2;
a second terminal of the second resistor R2 is connected to the second terminal of the low residual voltage sub-module 22.
In this embodiment, the first end of the first light emitting diode LED1 is further connected to the output terminal l_out of the live wire, and the second end of the second resistor R2 is further connected to the output terminal n_out of the zero wire. Thus, the first prompting module 31 can indicate the operating state of the voltage.
Optionally, the surge protection device further comprises: the second prompting module 32, the second prompting module 32 includes a second light emitting diode LED2 and a third resistor R3, a first end of the second light emitting diode LED2 is connected with the second end of the short-circuit prevention sub-module 21, a second end of the second light emitting diode LED2 is connected with a first end of the third resistor R3, and a second end of the third resistor R3 is connected with the second end of the low residual voltage sub-module 22.
In this embodiment, the second prompting module 32 may indicate the working state of the secondary surge protection module 2.
The maximum continuous working voltage of the surge protection device provided by the embodiment is 277V Alternating Current (AC), and the protection effect can be achieved that the residual voltage between a live wire and a zero wire is less than 600V, the residual voltage between the live wire and a ground wire is less than 1000V, and the residual voltage between the zero wire and the ground wire is less than 1800V.
Referring to fig. 4, a voltage and current waveform curve is formed in a time period of 1.2/50 mus by loading 20KV between the live wire and the zero wire. S1 is the residual voltage under a waveform of 1.2/50 mu S impacting 20kV, and S2 is the current flowing through the surge protection device of the embodiment under a voltage waveform of 1.2/50 mu S impacting 20 kV.
The surge protection device provided by the application enables the low residual voltage of the live wire L and the zero line N to be lower than 600V through the primary surge protection module, the first decoupling module and the second decoupling module are used for controlling the residual current of the primary surge protection module to control the bearing range of the semiconductor discharge tube, the residual current is controlled by using the structures of the fifth piezoresistor and the semiconductor discharge tube, and the leakage current of the fifth piezoresistor in the power frequency state is smaller than the turn-off current of the semiconductor discharge tube so that the secondary surge protection module is recovered to the high-resistance state after the surge. Thus, the surge safety of the surge protection device can be improved, and the protection effect is improved.
Although certain embodiments have been described above with a certain degree of particularity, those skilled in the art could make numerous alterations to the disclosed embodiments without departing from the scope of this disclosure. It is intended that all matter contained in the above description or shown in the accompanying drawings shall be interpreted as illustrative only and not limiting. Changes in detail or structure may be made without departing from this disclosure.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-described division of the functional units and modules is illustrated, and in practical application, the above-described functional distribution may be performed by different functional units and modules according to needs, i.e. the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-described functions. In the foregoing embodiments, the descriptions of the embodiments are emphasized, and in part, not described or illustrated in any particular embodiment, reference is made to the related descriptions of other embodiments.
The foregoing is merely specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily think about changes or substitutions within the technical scope of the present application, and the changes and substitutions are intended to be covered by the scope of the present application.

Claims (10)

1. A surge protection device, comprising: the device comprises a first protection module, a primary surge protection module, a secondary surge protection module, a voltage stabilizing module, a first decoupling module and a second decoupling module;
the first-stage surge protection module comprises a first discharging electronic module, a second discharging electronic module and a third discharging electronic module, wherein the first end of the first discharging electronic module is respectively connected with the first end of the second discharging electronic module and the first end of the third discharging electronic module; the second end of the first discharging sub-module is connected with the first end of the first protection module; the second end of the first protection module is used for connecting with a live wire; the second end of the second discharging sub-module is used for being connected with a zero line; the second end of the third discharging electronic module is used for being connected with a ground wire;
the first end of the voltage stabilizing module is connected with the first end of the first amplifying sub-module, and the second end of the voltage stabilizing module is connected with the second end of the first amplifying sub-module;
the first end of the first decoupling module is connected with the second end of the voltage stabilizing module, the second end of the first decoupling module is connected with the first end of the secondary surge protection module, the second end of the secondary surge protection module is connected with the first end of the second decoupling module, and the second end of the second decoupling module is connected with the second end of the second discharging module.
2. The surge protection device of claim 1, wherein the second discharge submodule comprises a first varistor and a second varistor, and wherein first and second parallel ends of the first varistor and the second varistor connected in parallel are the first and second ends of the second discharge submodule, respectively:
the third discharging submodule comprises a third piezoresistor and a fourth piezoresistor, and a first parallel end and a second parallel end of the third piezoresistor and the fourth piezoresistor which are connected in parallel are respectively the first end and the second end of the third discharging submodule.
3. The surge protection device of claim 2 wherein the first discharge submodule comprises a gas discharge tube, a first end of the gas discharge tube being the first end of the first discharge submodule, and a second end of the gas discharge tube being the second end of the first discharge submodule.
4. The surge protection device of claim 1, wherein the secondary surge protection module comprises a short-circuit prevention sub-module and a low residual voltage sub-module, a first end of the short-circuit prevention sub-module being the first end of the secondary surge protection module;
the second end of the short-circuit prevention sub-module is connected with the first end of the low-residual-voltage sub-module;
the second end of the low residual voltage sub-module is the second end of the secondary surge protection module.
5. The surge protection device of claim 4 wherein the anti-short sub-module comprises a fuse having a first end that is the first end of the anti-short sub-module and a second end that is the second end of the anti-short sub-module,
the low residual voltage sub-module comprises a fifth piezoresistor and a semiconductor discharge tube, wherein the first end of the fifth piezoresistor is the first end of the low residual voltage sub-module, and the first end of the fifth piezoresistor is connected with the second end of the protective tube;
the second end of the fifth piezoresistor is connected with the first end of the semiconductor discharge tube, and the second end of the semiconductor discharge tube is the second end of the low residual voltage sub-module.
6. The surge protection device of claim 1, wherein the voltage regulator module comprises a transient diode and a first resistor, a first end of the first resistor being the first end of the voltage regulator module, a second end of the first resistor being connected to a first end of the transient diode, a second end of the transient diode being the second end of the voltage regulator module.
7. The surge protection device of claim 1, wherein the first protection module is a temperature fuse, a first end of the temperature fuse is the first end of the first protection module, and a second end of the temperature fuse is the second end of the first protection module.
8. The surge protection device of claim 1, wherein the first decoupling module is a first inductor, a first end of the first inductor is the first end of the first decoupling module, and a second end of the first inductor is the second end of the first decoupling module;
the second decoupling module is a second inductor, a first end of the second inductor is the first end of the second decoupling module, and a second end of the second inductor is the second end of the second decoupling module.
9. The surge protection device of claim 4, further comprising: the first prompting module comprises a first light emitting diode and a second resistor;
the first end of the first light-emitting secondary light is connected with the first end of the anti-short-circuit sub-module, and the second end of the first light-emitting secondary light is connected with the first end of the second resistor;
and the second end of the second resistor is connected with the second end of the low residual voltage sub-module.
10. The surge protection device of claim 9, further comprising: the second prompting module comprises a second light emitting diode and a third resistor, wherein the first end of the second light emitting diode is connected with the second end of the short-circuit prevention sub-module, the second end of the second light emitting diode is connected with the first end of the third resistor, and the second end of the third resistor is connected with the second end of the low residual voltage sub-module.
CN202111309889.8A 2021-11-07 2021-11-07 Surge protection device Pending CN116093913A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202111309889.8A CN116093913A (en) 2021-11-07 2021-11-07 Surge protection device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202111309889.8A CN116093913A (en) 2021-11-07 2021-11-07 Surge protection device

Publications (1)

Publication Number Publication Date
CN116093913A true CN116093913A (en) 2023-05-09

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Application Number Title Priority Date Filing Date
CN202111309889.8A Pending CN116093913A (en) 2021-11-07 2021-11-07 Surge protection device

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CN (1) CN116093913A (en)

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