WO2019196164A1 - Surge protection circuit and apparatus for ground resistance tester - Google Patents

Surge protection circuit and apparatus for ground resistance tester Download PDF

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Publication number
WO2019196164A1
WO2019196164A1 PCT/CN2018/087633 CN2018087633W WO2019196164A1 WO 2019196164 A1 WO2019196164 A1 WO 2019196164A1 CN 2018087633 W CN2018087633 W CN 2018087633W WO 2019196164 A1 WO2019196164 A1 WO 2019196164A1
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WIPO (PCT)
Prior art keywords
clamping module
surge protection
resistance tester
protection circuit
pole
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PCT/CN2018/087633
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French (fr)
Chinese (zh)
Inventor
张庭炎
陈冯进
谭胜淋
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深圳远征技术有限公司
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Priority to CN201810333565.X priority Critical
Priority to CN201810333565.XA priority patent/CN108512206A/en
Application filed by 深圳远征技术有限公司 filed Critical 深圳远征技术有限公司
Publication of WO2019196164A1 publication Critical patent/WO2019196164A1/en

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Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02HEMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H9/00Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
    • H02H9/04Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
    • H02H9/041Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage using a short-circuiting device
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02HEMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H9/00Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
    • H02H9/04Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
    • H02H9/042Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage comprising means to limit the absorbed power or indicate damaged over-voltage protection device
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R27/00Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
    • G01R27/02Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
    • G01R27/20Measuring earth resistance; Measuring contact resistance, e.g. of earth connections, e.g. plates
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02HEMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H9/00Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
    • H02H9/04Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
    • H02H9/043Protection of over-voltage protection device by short-circuiting
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02HEMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H9/00Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
    • H02H9/04Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
    • H02H9/06Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage using spark-gap arresters
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/50Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/50Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
    • G01R31/52Testing for short-circuits, leakage current or ground faults

Abstract

A surge protection circuit and apparatus for a ground resistance tester (10). The surge protection circuit comprises: a first clamping module (21), a second clamping module (22), and a third clamping module (23). By connecting the first clamping module (21) between a ground electrode (301) and an auxiliary voltage electrode (302) of the ground resistance tester (10), connecting the second clamping module (22) between the auxiliary voltage electrode (302) and an auxiliary current electrode (303) of the ground resistance tester (10), and connecting the third clamping module (23) between the ground electrode (301) and the auxiliary current electrode (303) of the ground resistance tester (10), potential differences among said three electrodes of the ground resistance tester (10) are clamped within a preset range, thereby solving the existing problem that during the testing of a ground resistance using a three-electrode method, due to that the auxiliary electrodes are connected to the ground, when a lightning stroke or surge happens, a potential difference would be generated between any two of the three electrodes, and if the potential difference reaches a given degree, the ground resistance tester (10) would be damaged.

Description

一种用于接地电阻测试仪的浪涌保护电路及装置Surge protection circuit and device for grounding resistance tester 技术领域Technical field
本方案属于电子设备技术领域,尤其涉及一种用于接地电阻测试仪的浪涌保护电路及装置。The solution belongs to the technical field of electronic devices, and particularly relates to a surge protection circuit and device for a grounding resistance tester.
背景技术Background technique
接地电阻测试仪对接地系统的接地电阻进行测量时,通常采用三极法测试,即通过在于接地极一定距离的位置安装电压辅助极和电流辅助极,三极之间有一定的距离。When the grounding resistance tester measures the grounding resistance of the grounding system, it is usually tested by the three-pole method, that is, the voltage auxiliary pole and the current auxiliary pole are installed at a certain distance from the grounding pole, and there is a certain distance between the three poles.
然而,采用三极法对接地电阻进行测试时,由于辅助极与大地连接,当发生雷击或者浪涌的情况时,三极中的任两极之间会产生电势差,当电势差达到一定程度时便会击坏接地电阻仪。However, when the grounding resistance is tested by the three-pole method, since the auxiliary pole is connected to the earth, when a lightning strike or a surge occurs, a potential difference is generated between any two poles in the three poles, and when the potential difference reaches a certain level, Damn the grounding resistance meter.
技术问题technical problem
在采用三极法对接地电阻进行测试时,由于辅助极与大地连接,当发生雷击或者浪涌的情况时,三极中的任两极之间会产生电势差,当电势差达到一定程度时便会击坏接地电阻仪,使得接地电阻仪在雷雨天气使用时具有较大的安全隐患。When the grounding resistance is tested by the three-pole method, since the auxiliary pole is connected to the earth, when a lightning strike or a surge occurs, a potential difference is generated between any two poles in the three poles, and when the potential difference reaches a certain level, it will strike. The bad grounding resistance meter makes the grounding resistance meter have a great safety hazard when used in thunderstorm weather.
技术解决方案Technical solution
本方案的目的在于提供一种用于接地电阻测试仪的浪涌保护电路及装置,旨在解决目前采用三极法对接地电阻进行测试时,由于辅助极与大地连接,当发生雷击或者浪涌的情况时,三极中的任两极之间会产生电势差,当电势差达到一定程度时便会击坏接地电阻仪的问题。The purpose of this solution is to provide a surge protection circuit and device for a grounding resistance tester, which aims to solve the problem that when a grounding resistance is tested by a three-pole method, a lightning strike or a surge occurs when the auxiliary pole is connected to the earth. In the case of a situation, a potential difference is generated between any two poles in the three poles, and when the potential difference reaches a certain level, the problem of the grounding resistance meter is destroyed.
本方案实施例提供了一种用于接地电阻测试仪的浪涌保护电路,所述接地电阻测试仪分别设有接地极、电压辅助极以及电流辅助极,所述浪涌保护电路包括:第一钳位模块、第二钳位模块、第三钳位模块;The embodiment of the present invention provides a surge protection circuit for a grounding resistance tester. The grounding resistance tester is respectively provided with a grounding pole, a voltage auxiliary pole, and a current auxiliary pole. The surge protection circuit includes: a clamping module, a second clamping module, and a third clamping module;
所述第一钳位模块连接于所述接地极与所述电压辅助极之间,所述第二钳位模块连接于所述电压辅助极与所述电流辅助极之间,所述第三钳位模块连接于所述接地极与所述电流辅助极之间。The first clamping module is connected between the grounding pole and the voltage auxiliary pole, and the second clamping module is connected between the voltage auxiliary pole and the current auxiliary pole, the third clamp The bit module is connected between the ground electrode and the current auxiliary electrode.
作为本方案一实施例,所述第一钳位模块的第一端与所述接地极连接,所述第一钳位模块的第二端与所述电压辅助极连接。As an embodiment of the present solution, the first end of the first clamping module is connected to the grounding pole, and the second end of the first clamping module is connected to the voltage auxiliary pole.
作为本方案一实施例,所述第二钳位模块的第一端与所述电压辅助极连接,所述第二钳位模块的第二端与所述电流辅助极连接。As an embodiment of the present solution, the first end of the second clamping module is connected to the voltage auxiliary pole, and the second end of the second clamping module is connected to the current auxiliary pole.
作为本方案一实施例,所述第三钳位模块的第一端与所述接地极连接,所述第三钳位模块的第二端与所述电流辅助极连接。As an embodiment of the present solution, the first end of the third clamping module is connected to the grounding pole, and the second end of the third clamping module is connected to the current auxiliary pole.
本方案的另一目的在于,提供一种包括上述实施例中的任一项浪涌保护电路的用于接地电阻测试仪的浪涌保护装置。Another object of the present solution is to provide a surge protection device for a ground resistance tester including any of the surge protection circuits of the above embodiments.
本方案中的一种用于接地电阻测试仪的浪涌保护电路及装置,该浪涌保护电路包括:第一钳位模块、第二钳位模块以及第三钳位模块,通过将所述第一钳位模块连接于所述接地电阻测试仪的接地极与电压辅助极之间,所述第二钳位模块连接于所述接地电阻测试仪的电压辅助极与电流辅助极之间,所述第三钳位模块连接于所述接地电阻测试仪的接地极与电流辅助极之间,通过第一钳位模块、第二钳位模块以及第三钳位模块将接地电阻测试仪的三电极之间的电势差钳位在预设区域,以起到浪涌保护的作用,解决了目前采用三极法对接地电阻进行测试时,由于辅助极与大地连接,当发生雷击或者浪涌的情况时,三极中的任两极之间会产生电势差,当电势差达到一定程度时便会击坏接地电阻仪的问题。A surge protection circuit and device for a grounding resistance tester, the surge protection circuit includes: a first clamping module, a second clamping module, and a third clamping module, a clamping module is connected between the grounding pole of the grounding resistance tester and the voltage auxiliary pole, and the second clamping module is connected between the voltage auxiliary pole and the current auxiliary pole of the grounding resistance tester, The third clamping module is connected between the grounding pole of the grounding resistance tester and the current auxiliary pole, and the three electrodes of the grounding resistance tester are connected by the first clamping module, the second clamping module and the third clamping module. The potential difference between the clamps is clamped in the preset area to protect the grounding resistance. When the grounding resistance is tested by the three-pole method, when the auxiliary pole is connected to the earth, when lightning strikes or surges occur, A potential difference is generated between any two poles in the three poles, and the grounding resistance meter is destroyed when the potential difference reaches a certain level.
有益效果Beneficial effect
本方案提出一种用于接地电阻测试仪的浪涌保护电路及装置,该浪涌保护电路包括:第一钳位模块、第二钳位模块以及第三钳位模块,通过将所述第一钳位模块连接于所述接地电阻测试仪的接地极与电压辅助极之间,所述第二钳位模块连接于所述接地电阻测试仪的电压辅助极与电流辅助极之间,所述第三钳位模块连接于所述接地电阻测试仪的接地极与电流辅助极之间,通过第一钳位模块、第二钳位模块以及第三钳位模块将接地电阻测试仪的三电极之间的电势差钳位在预设区域,以起到浪涌保护的作用,解决了目前采用三极法对接地电阻进行测试时,由于辅助极与大地连接,当发生雷击或者浪涌的情况时,三极中的任两极之间会产生电势差,当电势差达到一定程度时便会击坏接地电阻仪的问题。The present invention provides a surge protection circuit and device for a grounding resistance tester, the surge protection circuit comprising: a first clamping module, a second clamping module, and a third clamping module, by using the first The clamping module is connected between the grounding pole of the grounding resistance tester and the voltage auxiliary pole, and the second clamping module is connected between the voltage auxiliary pole and the current auxiliary pole of the grounding resistance tester, The three clamp module is connected between the grounding pole of the grounding resistance tester and the current auxiliary pole, and is connected between the three electrodes of the grounding resistance tester through the first clamping module, the second clamping module and the third clamping module The potential difference is clamped in the preset area to protect the grounding. When the grounding resistance is tested by the three-pole method, when the auxiliary pole is connected to the earth, when lightning strikes or surges occur, A potential difference is generated between any two poles in the pole, and the grounding resistance meter is destroyed when the potential difference reaches a certain level.
附图说明DRAWINGS
为了更清楚地说明本方案实施例中的技术方案,下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍,显而易见地,下面描述中的附图仅仅是本方案的一些实施例,对于本领域普通技术人员来讲,在不付出创造性劳动性的前提下,还可以根据这些附图获得其他的附图。In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the embodiments or the prior art description will be briefly described below. Obviously, the drawings in the following description are only the solutions of the present embodiment. For some embodiments, other drawings may be obtained from those of ordinary skill in the art in light of the inventive workability.
图1是本方案实施例1提供的一种用于接地电阻测试仪的浪涌保护电路的电路结构图;1 is a circuit structural diagram of a surge protection circuit for a grounding resistance tester provided in Embodiment 1 of the present embodiment;
图2是本方案实施例2提供的一种用于接地电阻测试仪的浪涌保护电路的电路结构图。2 is a circuit structural diagram of a surge protection circuit for a grounding resistance tester according to Embodiment 2 of the present embodiment.
本发明的实施方式Embodiments of the invention
实施例1Example 1
图1是本方案实施例1提供的一种用于接地电阻测试仪10的浪涌保护电路的电路结构图,为了便于说明,仅示出了与本实施例相关的部分,详述如下:1 is a circuit structural diagram of a surge protection circuit for a grounding resistance tester 10 provided in Embodiment 1 of the present embodiment. For convenience of description, only parts related to the present embodiment are shown, which are described in detail as follows:
如图1所示,本实施例中的浪涌保护电路包括:第一钳位模块21、第二钳位模块22、第三钳位模块23,本实施例中的接地电阻测试仪分别设有接地极、电压辅助极以及电流辅助极;具体的,第一钳位模块21连接于接地电阻测试仪10的接地极与电压辅助极之间,第二钳位模块22连接于接地电阻测试仪10的电压辅助极与电流辅助极之间,第三钳位模块23连接于接地电阻测试仪10的接地极与电流辅助极之间。As shown in FIG. 1, the surge protection circuit in this embodiment includes: a first clamping module 21, a second clamping module 22, and a third clamping module 23. The grounding resistance tester in this embodiment is respectively provided. The grounding pole, the voltage auxiliary pole, and the current auxiliary pole; specifically, the first clamping module 21 is connected between the grounding pole of the grounding resistance tester 10 and the voltage auxiliary pole, and the second clamping module 22 is connected to the grounding resistance tester 10 Between the voltage auxiliary pole and the current auxiliary pole, the third clamp module 23 is connected between the grounding pole of the grounding resistance tester 10 and the current auxiliary pole.
在本实施例中,正常情况下,接地电阻测试仪10的接地极与电压辅助极之间、接地电阻测试仪10的电压辅助极与电流辅助极之间、接地电阻测试仪10的接地极与电流辅助极之间的工作电压小于第一钳位模块21、第二钳位模块22、第三钳位模块23等钳位模块的导通电压,因此,第一钳位模块21、第二钳位模块22、第三钳位模块23等钳位模块对于接地电阻测试仪10的正常工作没有影响,在有雷电或者浪涌出现的情况时,接地电阻测试仪10的接地极与电压辅助极之间、接地电阻测试仪10的电压辅助极与电流辅助极之间或者接地电阻测试仪10的接地极与电流辅助极之间会产生电势差,当电势差达到第一钳位模块21、第二钳位模块22、第三钳位模块23等钳位模块的导通电压时,第一钳位模块21、第二钳位模块22、第三钳位模块23等钳位模块就会导通,通过将电势差钳位在她们的击穿电压,从而使接地电阻仪在工作中得到保护。In this embodiment, under normal conditions, the grounding pole of the grounding resistance tester 10 and the voltage auxiliary pole, the voltage auxiliary pole of the grounding resistance tester 10 and the current auxiliary pole, and the grounding pole of the grounding resistance tester 10 The working voltage between the current auxiliary poles is smaller than the voltage of the clamping module of the first clamping module 21, the second clamping module 22, the third clamping module 23, etc., therefore, the first clamping module 21 and the second clamp The clamping module such as the bit module 22 and the third clamping module 23 has no influence on the normal operation of the grounding resistance tester 10. In the case of lightning or surge, the grounding electrode and the voltage auxiliary pole of the grounding resistance tester 10 A potential difference is generated between the voltage auxiliary pole and the current auxiliary pole of the grounding resistance tester 10 or between the grounding pole and the current auxiliary pole of the grounding resistance tester 10, when the potential difference reaches the first clamping module 21 and the second clamping position. When the voltage of the clamp module of the module 22 and the third clamp module 23 is turned on, the clamp modules such as the first clamp module 21, the second clamp module 22, and the third clamp module 23 are turned on, and the Potential difference clamp Their breakdown voltage, so that the earth resistance meter protection in the workplace.
作为本方案一实施例,用户可以根据需要对第一钳位模块21、第二钳位模块22、第三钳位模块23的导通电压进行限制,以使接地电阻仪在不同的应用环境下均得到防浪涌保护。As an embodiment of the present solution, the user can limit the turn-on voltages of the first clamping module 21, the second clamping module 22, and the third clamping module 23 according to requirements, so that the grounding resistance device can be used in different application environments. All are protected against surges.
实施例2Example 2
图2是本方案实施例2提供的一种用于接地电阻测试仪10的浪涌保护电路的电路结构图,如图2所示,第一钳位模块21的第一端与接地极连接,第一钳位模块21的第二端与电压辅助极连接。2 is a circuit structural diagram of a surge protection circuit for the grounding resistance tester 10 provided in Embodiment 2 of the present embodiment. As shown in FIG. 2, the first end of the first clamping module 21 is connected to the grounding pole. The second end of the first clamping module 21 is connected to the voltage auxiliary pole.
作为本方案一实施例,请参阅图2,第一钳位模块21包括:第一瞬态抑制二极管TVS1和第一放电管GDT1;具体的,第一瞬态抑制二极管TVS1的第一端和第一放电管GDT1的第一端共接作为第一钳位模块21的第一端,第一瞬态抑制二极管TVS1的第二端和第一放电管GDT1的第二端共接作为第一钳位模块21的第二端。As an embodiment of the present embodiment, referring to FIG. 2, the first clamping module 21 includes: a first transient suppression diode TVS1 and a first discharge tube GDT1; specifically, a first end and a first end of the first transient suppression diode TVS1 A first end of a discharge tube GDT1 is commonly connected as a first end of the first clamping module 21, and a second end of the first transient suppression diode TVS1 and a second end of the first discharge tube GDT1 are commonly connected as a first clamp The second end of module 21.
作为本方案一实施例,第一放电管GDT1可以为气体放电管,气体放电管的响应时间一般在数百纳秒(ns)以至数毫秒(ms)之间,响应速度较慢,而瞬态抑制二极管(Transient Voltage Suppressor,TVS)的响应时间可达皮秒(ps)级别;另一方面,气体放电管的通流量比TVS管要大,气体放电管用于最前级,其后级的防护电路由TVS管组成,这种器件的响应时间很快,对后级电路的保护效果更好。As an embodiment of the present solution, the first discharge tube GDT1 may be a gas discharge tube, and the response time of the gas discharge tube is generally between several hundred nanoseconds (ns) and even several milliseconds (ms), and the response speed is slow, and the transient state is Suppression diode Suppressor, TVS) response time can reach picosecond (ps) level; on the other hand, the gas discharge tube has a larger flow rate than the TVS tube, the gas discharge tube is used for the foremost stage, and the protection circuit of the latter stage is composed of TVS tube. This device has a fast response time and better protection for the rear stage circuit.
作为本方案一实施例,请参阅图2,第二钳位模块22的第一端与电压辅助极连接,第二钳位模块22的第二端与电流辅助极连接。As an embodiment of the present invention, referring to FIG. 2, the first end of the second clamping module 22 is connected to the voltage auxiliary pole, and the second end of the second clamping module 22 is connected to the current auxiliary pole.
作为本方案一实施例,请参阅图2,第二钳位模块22包括:第二瞬态抑制二极管TVS2和第二放电管GDT2;具体的,第二瞬态抑制二极管TVS2的第一端和第二放电管GDT2的第一端共接作为第二钳位模块22的第一端,第二瞬态抑制二极管TVS2的第二端和第二放电管GDT2的第二端共接作为第二钳位模块22的第二端。As an embodiment of the present embodiment, referring to FIG. 2, the second clamping module 22 includes: a second transient suppression diode TVS2 and a second discharge tube GDT2; specifically, a first end and a second end of the second transient suppression diode TVS2 The first end of the second discharge tube GDT2 is commonly connected as the first end of the second clamping module 22, and the second end of the second transient suppression diode TVS2 and the second end of the second discharge tube GDT2 are connected as the second clamp The second end of module 22.
作为本方案一实施例,第二放电管GDT2可以为气体放电管。As an embodiment of the present solution, the second discharge tube GDT2 may be a gas discharge tube.
作为本方案一实施例,请参阅图2,第三钳位模块23的第一端与接地极连接,第三钳位模块23的第二端与电流辅助极连接。As an embodiment of the present invention, referring to FIG. 2, the first end of the third clamping module 23 is connected to the grounding pole, and the second end of the third clamping module 23 is connected to the current auxiliary pole.
作为本方案一实施例,请参阅图2,第三钳位模块23包括:第三瞬态抑制二极管TVS3和第三放电管GDT3;具体的,第三瞬态抑制二极管TVS3的第一端和第三放电管GDT3的第一端共接作为第三钳位模块23的第一端,第三瞬态抑制二极管TVS3的第二端和第三放电管GDT3的第二端共接作为第三钳位模块23的第二端。As an embodiment of the present embodiment, referring to FIG. 2, the third clamping module 23 includes: a third transient suppression diode TVS3 and a third discharge tube GDT3; specifically, the first end and the third transient suppression diode TVS3 The first end of the third discharge tube GDT3 is commonly connected as the first end of the third clamp module 23. The second end of the third transient suppression diode TVS3 and the second end of the third discharge tube GDT3 are connected as the third clamp. The second end of module 23.
作为本方案一实施例,第三放电管GDT3可以为气体放电管。As an embodiment of the present solution, the third discharge tube GDT3 may be a gas discharge tube.
作为本方案一实施例,本实施例中还提出了用于接地电阻测试仪10的浪涌保护装置,该浪涌保护装置包括如上述实施例中任一项所述的浪涌保护电路。As an embodiment of the present solution, a surge protection device for the ground resistance tester 10 is also proposed in the embodiment, and the surge protection device includes the surge protection circuit according to any of the above embodiments.
本方案实施例提供的一种用于接地电阻测试仪的浪涌保护电路及装置,该浪涌保护电路包括:第一钳位模块、第二钳位模块以及第三钳位模块,通过将所述第一钳位模块连接于所述接地电阻测试仪的接地极与电压辅助极之间,所述第二钳位模块连接于所述接地电阻测试仪的电压辅助极与电流辅助极之间,所述第三钳位模块连接于所述接地电阻测试仪的接地极与电流辅助极之间,通过第一钳位模块、第二钳位模块以及第三钳位模块将接地电阻测试仪的三电极之间的电势差钳位在预设区域,以起到浪涌保护的作用,解决了目前采用三极法对接地电阻进行测试时,由于辅助极与大地连接,当发生雷击或者浪涌的情况时,三极中的任两极之间会产生电势差,当电势差达到一定程度时便会击坏接地电阻仪的问题。A surge protection circuit and device for a grounding resistance tester provided by the embodiment of the present invention, the surge protection circuit includes: a first clamping module, a second clamping module, and a third clamping module, The first clamping module is connected between the grounding pole of the grounding resistance tester and the voltage auxiliary pole, and the second clamping module is connected between the voltage auxiliary pole and the current auxiliary pole of the grounding resistance tester. The third clamping module is connected between the grounding pole of the grounding resistance tester and the current auxiliary pole, and the grounding resistance tester is three through the first clamping module, the second clamping module and the third clamping module. The potential difference between the electrodes is clamped in the preset area to protect against the surge protection. When the grounding resistance is tested by the three-pole method, the lightning strike or surge occurs when the auxiliary pole is connected to the earth. When there is a potential difference between any two poles in the three poles, the grounding resistance meter will be damaged when the potential difference reaches a certain level.
以上仅为本方案的较佳实施例而已,并不用以限制本方案,凡在本方案的精神和原则之内所作的任何修改、等同替换和改进等,均应包含在本方案的保护范围之内。The above is only the preferred embodiment of the present solution, and is not intended to limit the present solution. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present solution should be included in the scope of protection of the present solution. Inside.

Claims (8)

  1. 一种用于接地电阻测试仪的浪涌保护电路,所述接地电阻测试仪分别设有接地极、电压辅助极以及电流辅助极,其特征在于,所述浪涌保护电路包括第一钳位模块、第二钳位模块以及第三钳位模块;A surge protection circuit for a grounding resistance tester, wherein the grounding resistance tester is respectively provided with a grounding pole, a voltage auxiliary pole and a current auxiliary pole, wherein the surge protection circuit comprises a first clamping module a second clamping module and a third clamping module;
    所述第一钳位模块连接于所述接地极与所述电压辅助极之间,所述第二钳位模块连接于所述电压辅助极与所述电流辅助极之间,所述第三钳位模块连接于所述接地极与所述电流辅助极之间。The first clamping module is connected between the grounding pole and the voltage auxiliary pole, and the second clamping module is connected between the voltage auxiliary pole and the current auxiliary pole, the third clamp The bit module is connected between the ground electrode and the current auxiliary electrode.
  2. 如权利要求1所述的浪涌保护电路,其特征在于,所述第一钳位模块的第一端与所述接地极连接,所述第一钳位模块的第二端与所述电压辅助极连接。The surge protection circuit of claim 1 , wherein the first end of the first clamping module is connected to the grounding pole, the second end of the first clamping module is connected to the voltage assisting Extremely connected.
  3. 如权利要求2所述的浪涌保护电路,其特征在于,所述第一钳位模块包括:第一瞬态抑制二极管和第一放电管;The surge protection circuit of claim 2, wherein the first clamping module comprises: a first transient suppression diode and a first discharge tube;
    所述第一瞬态抑制二极管的第一端和所述第一放电管的第一端共接作为所述第一钳位模块的第一端,所述第一瞬态抑制二极管的第二端和所述第一放电管的第二端共接作为所述第一钳位模块的第二端。a first end of the first transient suppression diode and a first end of the first discharge tube are commonly connected as a first end of the first clamping module, and a second end of the first transient suppression diode And a second end of the first discharge tube is commonly connected as a second end of the first clamping module.
  4. 如权利要求1所述的浪涌保护电路,其特征在于,所述第二钳位模块的第一端与所述电压辅助极连接,所述第二钳位模块的第二端与所述电流辅助极连接。The surge protection circuit of claim 1 , wherein the first end of the second clamping module is coupled to the voltage auxiliary pole, and the second end of the second clamping module is coupled to the current Auxiliary pole connection.
  5. 如权利要求4所述的浪涌保护电路,其特征在于,所述第二钳位模块包括:第二瞬态抑制二极管和第二放电管;The surge protection circuit of claim 4, wherein the second clamping module comprises: a second transient suppression diode and a second discharge tube;
    所述第二瞬态抑制二极管的第一端和所述第二放电管的第一端共接作为所述第二钳位模块的第一端,所述第二瞬态抑制二极管的第二端和所述第二放电管的第二端共接作为所述第二钳位模块的第二端。a first end of the second transient suppression diode and a first end of the second discharge tube are commonly connected as a first end of the second clamping module, and a second end of the second transient suppression diode And a second end of the second discharge tube is commonly connected as a second end of the second clamping module.
  6. 如权利要求1所述的浪涌保护电路,其特征在于,所述第三钳位模块的第一端与所述接地极连接,所述第三钳位模块的第二端与所述电流辅助极连接。The surge protection circuit of claim 1 , wherein the first end of the third clamping module is coupled to the grounding pole, the second end of the third clamping module is coupled to the current assist Extremely connected.
  7. 如权利要求6所述的浪涌保护电路,其特征在于,所述第三钳位模块包括:第三瞬态抑制二极管和第三放电管;The surge protection circuit of claim 6 , wherein the third clamping module comprises: a third transient suppression diode and a third discharge tube;
    所述第三瞬态抑制二极管的第一端和所述第三放电管的第一端共接作为所述第三钳位模块的第一端,所述第三瞬态抑制二极管的第二端和所述第三放电管的第二端共接作为所述第三钳位模块的第二端。a first end of the third transient suppression diode and a first end of the third discharge tube are commonly connected as a first end of the third clamping module, and a second end of the third transient suppression diode And a second end of the third discharge tube is commonly connected as a second end of the third clamping module.
  8. 一种用于接地电阻测试仪的浪涌保护装置,其特征在于,所述浪涌保护装置包括如权利要求1-7中任一项所述的浪涌保护电路。A surge protection device for a ground resistance tester, characterized in that the surge protection device comprises the surge protection circuit according to any one of claims 1-7.
PCT/CN2018/087633 2018-04-13 2018-05-21 Surge protection circuit and apparatus for ground resistance tester WO2019196164A1 (en)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120044599A1 (en) * 2010-08-17 2012-02-23 Lutron Electronics Co., Inc. Surge Suppression Circuit for a Load Control Device
CN106771716A (en) * 2016-11-28 2017-05-31 上海优泰欧申机电有限公司 Lightning protected intelligent management system
CN206321712U (en) * 2017-01-09 2017-07-11 成都工业学院 Impulse earthed resistance measuring system
CN206348391U (en) * 2016-12-19 2017-07-21 深圳远征技术有限公司 A kind of earth resistance device
CN107607789A (en) * 2017-09-06 2018-01-19 扬州华峰防雷新科技有限公司 A kind of ground resistance measurement method of lightning protection device
CN207994621U (en) * 2018-04-13 2018-10-19 深圳远征技术有限公司 A kind of surge protection circuit and device for earth resistance tester

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120044599A1 (en) * 2010-08-17 2012-02-23 Lutron Electronics Co., Inc. Surge Suppression Circuit for a Load Control Device
CN106771716A (en) * 2016-11-28 2017-05-31 上海优泰欧申机电有限公司 Lightning protected intelligent management system
CN206348391U (en) * 2016-12-19 2017-07-21 深圳远征技术有限公司 A kind of earth resistance device
CN206321712U (en) * 2017-01-09 2017-07-11 成都工业学院 Impulse earthed resistance measuring system
CN107607789A (en) * 2017-09-06 2018-01-19 扬州华峰防雷新科技有限公司 A kind of ground resistance measurement method of lightning protection device
CN207994621U (en) * 2018-04-13 2018-10-19 深圳远征技术有限公司 A kind of surge protection circuit and device for earth resistance tester

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