WO2013075374A1 - 交流高压电线的监测装置和方法 - Google Patents
交流高压电线的监测装置和方法 Download PDFInfo
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- WO2013075374A1 WO2013075374A1 PCT/CN2011/084262 CN2011084262W WO2013075374A1 WO 2013075374 A1 WO2013075374 A1 WO 2013075374A1 CN 2011084262 W CN2011084262 W CN 2011084262W WO 2013075374 A1 WO2013075374 A1 WO 2013075374A1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
- G01R31/085—Locating faults in cables, transmission lines, or networks according to type of conductors in power transmission or distribution lines, e.g. overhead
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/54—Testing for continuity
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/58—Testing of lines, cables or conductors
Definitions
- the present invention relates to the field of electric power, and in particular to a monitoring apparatus and method for an alternating current high voltage electric wire.
- Some high-voltage devices such as a wall anti-over system, an electrostatic discharge device, etc., apply a high voltage to a length of wire or wire. In the process of use, if the wire or wire is broken, the high-voltage device cannot work normally. When the wire or wire is broken, it needs to be handled by the staff in time. In view of the problem that the staff in the related art cannot handle the disconnection of the AC high-voltage electric wire in time, an effective solution has not been proposed yet.
- a primary object of the present invention is to provide a monitoring apparatus and method for an AC high voltage electric wire to solve the problem that a worker cannot handle the disconnection of an AC high voltage electric wire in time.
- a monitoring apparatus for an alternating current high voltage electric wire is provided.
- the monitoring device for an alternating current high voltage electric wire comprises: a detecting electrode disposed at a predetermined distance from the alternating current high voltage electric wire for forming a capacitance with the electric wire; and an inductive device connected to the detecting electrode for passing the detecting electrode and The capacitor formed by the electric wire senses the AC high voltage to obtain the sensing signal; the controller is connected to the sensing device to determine whether the sensing signal satisfies the preset condition, and outputs an alarm signal when the sensing signal does not satisfy the preset condition.
- the sensing device is a resistor, the first end of the resistor is connected to the detecting electrode, and the second end is grounded to form an induced voltage.
- the monitoring device further includes: a buffer, the first end is connected to the resistor, and the second end is connected to the controller.
- the controller includes: a calculating unit, configured to calculate an induced voltage; a determining unit, configured to determine whether the induced voltage is lower than a preset value; and an executing unit, configured to output an alarm signal when the induced voltage is lower than a preset value .
- the calculation unit calculates the induced voltage using the following formula: Where R is the resistance, U is the AC voltage on the wire, f is the frequency of the AC voltage, V R is the voltage of the resistance, ie the induced voltage, and C is the capacitance between the detection electrode and the wire.
- the device further includes: an alarm, connected to the controller, configured to report the old according to the alarm signal.
- a monitoring method of an alternating current high voltage electric wire includes: sensing an AC high voltage by a capacitor formed by an AC high voltage electric wire and a detecting electrode to obtain an inductive signal; determining whether the sensing signal satisfies a preset condition; and when the sensing signal does not satisfy a preset condition, An alarm signal is issued. Further, inducing an alternating voltage through a capacitor formed by the alternating high voltage power line and the detecting electrode to obtain an induced signal comprises: forming an induced voltage.
- determining whether the sensing signal satisfies a preset condition; and when the sensing signal does not satisfy the preset condition, outputting the alarm signal includes: calculating the induced voltage; determining whether the induced voltage is lower than a preset value; and detecting the voltage lower than the preset When the value is output, an alarm signal is output. Further, the induced voltage is calculated using the following formula:
- a monitoring device comprising an alternating current high voltage electric wire comprising the following structure: a detecting electrode disposed at a predetermined distance from the alternating current high voltage electric wire for forming a capacitance with the electric wire; and an inductive device connected to the detecting electrode for The capacitor is sensed by the capacitor to obtain an inductive signal; the controller is connected to the sensing device, and is configured to determine whether the sensing signal meets a preset condition, and output an alarm signal when the sensing signal does not satisfy the preset condition.
- FIG. 1 is a block diagram of a monitoring apparatus for an alternating current high voltage electric wire according to an embodiment of the present invention
- FIG. 2 is a schematic diagram of a monitoring apparatus for an alternating current high voltage electric wire according to an embodiment of the present invention
- FIG. 3 is an embodiment according to the present invention.
- DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict. The invention will be described in detail below with reference to the drawings in conjunction with the embodiments.
- 1 is a block diagram of a monitoring device for an alternating current high voltage electric wire according to an embodiment of the present invention. As shown in FIG.
- the monitoring device includes: a detecting electrode 10 disposed at a predetermined distance from an alternating current high voltage wire for use with a wire Forming a capacitor; the sensing device 30 is connected to the detecting electrode 10 for sensing the alternating high voltage through the capacitor to obtain an inductive signal; the controller 50 is connected to the sensing device 30 for determining whether the sensing signal meets a preset condition, and The alarm signal is output when the sensing signal does not satisfy the preset condition.
- the detecting electrode 10 is disposed in the vicinity of the alternating current high-voltage electric wire to form a capacitance between the detecting electrode 10 and the electric wire, and then the alternating high voltage is induced by the sensing device 30 to obtain an induced signal, and the signal is output to the controller 50,
- the controller 50 compares the sensing signal with a preset condition, wherein the preset condition is a characteristic that should be present when the AC high voltage power line works normally, so that when the sensing signal does not match the preset condition, the AC high voltage wire is disconnected. At this time, an alarm signal is output to enable the staff to handle the disconnection of the wire in time.
- the outputting the alarm signal may include outputting a signal that controls the display to display the alarm message, or a signal that controls the alarm of the alarm, or outputting a signal that otherwise alerts the worker that the wire is disconnected.
- the device further includes: an alarm, connected to the controller 50, configured to perform an alarm according to the alarm signal, and when the sensing signal does not meet the preset condition, the controller controls the alarm alarm number to enable the staff to timely process The wire is disconnected.
- 2 is a schematic diagram of a monitoring device for an alternating current high voltage electric wire according to an embodiment of the present invention. As shown in FIG.
- the AB segment is an alternating current high voltage wire or an electrode wire, and the terminal A is connected to the high voltage electrode of the alternating current high voltage generator, and B is the end.
- Set any detection point between AB including detection points 1, ..., n, ..., B and so on.
- a detecting electrode is respectively disposed, and the detecting electrode is close to the high voltage electric wire or the electrode wire, and a capacitance is formed between the detecting electrode and the high voltage electric wire or the electric wire, and the capacitance of the capacitor is C.
- the detecting electrode is connected to the resistor R, and the other end of the resistor R is grounded to induce an alternating voltage to form an induced voltage.
- the induced voltage is output through a buffer stage with a high input impedance, and the high input impedance ensures that the induced voltage is not attenuated.
- the controller calculates the induced voltage through the calculating unit, determines whether the induced voltage is lower than the preset value by the determining unit, and finally executes the preset when the induced voltage is lower than the preset value by the executing unit.
- the command wherein the preset value is determined according to an actual working condition, and is preferably zero.
- the calculation unit calculates the induced voltage by the following method:
- U is the high voltage AC voltage
- f is the high voltage AC voltage frequency
- V R is the induced voltage on the resistor R, buffered by the buffer output, after the signal is buffered, the controller performs an alarm or other control operation according to the induced voltage.
- the controller performs an alarm or other control operation, so that the staff can know the working condition of the AC high voltage electric wire in time, so that the electric wire break can be dealt with in time. open. If you only need to judge whether the high voltage wire (wire) is broken or not, you only need to set a probe point at the end B. If you need to judge the breakpoint, you need to set multiple probe points. Assuming that the high-voltage electric wire or the wire is broken between the n-1 point and the n-point, the detection points after the n-point have no high-voltage induction signal, so that the interval in which the breakpoint is located can be determined.
- Step S102 Inductive AC high voltage is formed by a capacitor formed by the alternating high voltage electric wire and the detecting electrode to obtain an inductive signal.
- Step S104 Determine whether the sensing signal satisfies a preset condition.
- Step S106 When the sensing signal does not satisfy the preset condition, the alarm signal is output.
- a detecting electrode is disposed in the vicinity of the alternating current high-voltage electric wire, so that the electric wire of the detecting electrode 1 forms a capacitance, and the alternating high voltage is induced to form an inductive signal through step S102, and the sensing signal is compared with a preset condition by step S104, wherein
- the preset condition is the characteristic that the AC high-voltage electric wire should have when it works normally. Therefore, when the sensing signal does not match the preset condition, the AC high-voltage electric wire is disconnected, and an alarm signal is output at this time, so that the staff can timely deal with the disconnection of the electric wire. open.
- the outputting the alarm signal may include outputting a signal to control the display of the alarm information, or controlling the alarm to signal the alarm, or outputting a signal to otherwise alert the worker that the wire is disconnected.
- the step S102 includes: inductive AC high voltage formed by the alternating high voltage electric wire and the detecting electrode to obtain an induced voltage
- step S104 and step S106 include: calculating an induced voltage; determining whether the induced voltage is lower than a preset value; When the preset value is lower than the preset value, an alarm signal is output.
- the induced voltage is calculated by the following formula:
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- General Physics & Mathematics (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
- Testing Relating To Insulation (AREA)
Abstract
提供一种交流高压电线的监测装置和方法。该装置包括：探测电极（10），设置于与交流高压电线相距预设距离的位置，用于与电线形成电容；感应装置（30），与探测电极（10）相连接，用于通过电容感应交流高压以得到感应信号；控制器（50），与感应装置（30）相连接，用于判断感应信号是否满足预设条件，并在感应信号不满足预设条件时，输出报警信号。本装置实时监测交流高压电线，并在监测信号不满足预设条件时，输出报警信号，以使工作人员能够确定交流高压电线断开，从而及时维修。
Description
交流高压电线的监测装置和方法 技术领域 本发明涉及电力领域， 具体而言， 涉及一种交流高压电线的监测装置和方法。 背景技术 一些高压装置如围墙防翻越系统、 静电放电装置等是将高压加在一段电线或电极 丝上， 在使用过程中， 如果电线或电极丝发生断裂， 高压装置便不能正常工作， 因此， 在电线或电极丝发生断裂时， 需要工作人员及时处理。 针对相关技术中工作人员不能及时处理交流高压电线断开的问题， 目前尚未提出 有效的解决方案。 发明内容 本发明的主要目的在于提供一种交流高压电线的监测装置和方法， 以解决工作人 员不能及时处理交流高压电线断开的问题。 为了实现上述目的， 根据本发明的一个方面， 提供了一种交流高压电线的监测装 置。 根据本发明的交流高压电线的监测装置包括： 探测电极， 设置于与交流高压电线 相距预设距离的位置， 用于与电线形成电容； 感应装置， 与探测电极相连接， 用于通 过探测电极与电线形成的电容感应交流高压以得到感应信号； 控制器， 与感应装置相 连接， 用于判断感应信号是否满足预设条件， 并在感应信号不满足预设条件时， 输出 报警信号。 进一步地， 感应装置为电阻， 该电阻的第一端与探测电极相连接， 第二端接地， 用于形成感应电压。 进一步地， 该监测装置还包括： 缓冲器， 第一端与电阻相连接， 第二端与控制器 相连接。
进一步地， 控制器包括： 计算单元， 用于计算感应电压； 判断单元， 用于判断感 应电压是否低于预设值； 以及执行单元， 用于在感应电压低于预设值时， 输出报警信 号。 进一步地， 计算单元采用以下公式计算感应电压：
其中， R为电阻， U为电线上的交流电压， f为交流电压的频率， VR为电阻的电 压， 即感应电压， C为探测电极与电线之间的电容。 进一步地， 该装置还包括： 报警器， 与控制器相连接， 用于根据报警信号进行报 舊。 为了实现上述目的， 根据本发明的另一个方面， 提供了一种交流高压电线的监测 方法。 根据本发明的交流高压电线的监测方法包括： 通过交流高压电线与探测电极形成 的电容感应交流高压以得到感应信号； 判断感应信号是否满足预设条件； 以及在感应 信号不满足预设条件时， 发出报警信号。 进一步地， 通过交流高压电线与探测电极形成的电容感应交流高压以得到感应信 号包括： 形成感应电压。 进一步地，判断感应信号是否满足预设条件； 以及在感应信号不满足预设条件时， 输出报警信号包括： 计算感应电压； 判断感应电压是否低于预设值； 以及在感应电压 低于预设值时， 输出报警信号。 进一步地， 采用以下公式计算感应电压：
其中， R为电阻， U为电线上的交流电压， f为交流电压的频率， VR为电阻的电 压， 即感应电压， C为探测电极与电线之间的电容。 通过本发明， 采用包括以下结构的交流高压电线的监测装置： 探测电极， 设置于 与交流高压电线相距预设距离的位置， 用于与电线形成电容； 感应装置， 与探测电极 相连接， 用于通过该电容感应交流高压以得到感应信号； 控制器， 与感应装置相连接， 用于判断感应信号是否满足预设条件， 并在感应信号不满足预设条件时， 输出报警信
号， 实时监测交流高压电线， 并在监测信号不满足预设条件时， 输出报警信号， 以使 工作人员能够根据报警确定交流高压电线断开， 从而及时维修， 解决了工作人员不能 及时处理交流高压电线断开的问题， 进而达到了及时确定并处理交流高压电线断开的 效果。 附图说明 构成本申请的一部分的附图用来提供对本发明的进一步理解， 本发明的示意性实 施例及其说明用于解释本发明， 并不构成对本发明的不当限定。 在附图中： 图 1是根据本发明实施例的交流高压电线的监测装置的框图； 图 2是根据本发明实施例的交流高压电线的监测装置的示意图； 以及 图 3是根据本发明实施例的交流高压电线的监测方法的流程图。 具体实施方式 需要说明的是， 在不冲突的情况下， 本申请中的实施例及实施例中的特征可以相 互组合。 下面将参考附图并结合实施例来详细说明本发明。 图 1是根据本发明实施例的交流高压电线的监测装置的框图， 如图 1所示， 该监 测装置包括： 探测电极 10， 设置于与交流高压电线相距预设距离的位置， 用于与电线 形成电容； 感应装置 30， 与探测电极 10相连接， 用于通过该电容感应交流高压以得 到感应信号； 控制器 50， 与感应装置 30相连接， 用于判断感应信号是否满足预设条 件， 并在感应信号不满足预设条件时， 输出报警信号。 在该实施例中， 通过在交流高压电线附近设置探测电极 10， 以使探测电极 10与 电线形成电容，进而通过感应装置 30感应交流高压以得到感应信号， 并将该信号输出 至控制器 50， 控制器 50将该感应信号与预设条件进行比较， 其中， 预设条件为交流 高压电线正常工作时应有的特性， 从而， 在该感应信号与预设条件不符时， 说明交流 高压电线断开， 此时输出报警信号， 以使工作人员及时处理电线的断开。 在该实施例中， 输出报警信号可以包括输出控制显示器显示报警信息的信号， 或 者控制报警器报警的信号， 或者输出以其他方式警示工作人员电线断开的信号。
优选地， 该装置还包括： 报警器， 与控制器 50相连接， 用于根据报警信号进行报 警， 在感应信号不满足预设条件时， 控制器控制报警器报警号， 以使工作人员及时处 理电线的断开。 图 2是根据本发明实施例的交流高压电线的监测装置的示意图， 如图 2所示， AB 段为交流高压电线或电极丝， A端连接交流高压发生器的高压电极， B为末端。在 AB 间设置任意探测点， 在图中包括探测点 1， ……， n， ……， B等点。 在各探测点处， 分别设置探测电极， 探测电极靠近高压电线或电极丝， 探测电极与高压电线或电极丝 间形成电容， 该电容器的电容为 C。 探测电极与电阻 R连接， 电阻 R另一端接地， 用 于感应交流高压形成感应电压。 该感应电压通过高输入阻抗的缓冲级输出， 高输入阻 抗确保感应电压不被衰减。 控制器接收到缓冲器的输出电压信号后， 通过其计算单元计算感应电压， 通过判 断单元判断感应电压是否低于预设值， 最后通过执行单元在感应电压低于预设值时， 执行预设命令， 其中， 该预设值根据实际使用工况确定， 优选为零。 其中， 计算单元采用如下的方法计算感应电压：
其中， U为高压交流电压， f为高压交流电压频率， VR为电阻 R上的感应电压， 由缓冲器缓冲输出， 对该信号进行缓冲处理后， 控制器根据感应电压进行报警或其它 控制操作。 在该方法中， 电容 C、 交流电压频率 f或电阻 R越大， 探测到的感应电压信号 越大， 因此， 探测电极与高压电线 （丝） 之间的距离为不发生放电且能够产生足够高 的感应电压为佳。 在该实施例中， 能够实时检测交流高压电线是否断开， 并且在电线断开时， 控制 器进行报警或其它控制操作， 以使工作人员及时了解交流高压电线工作状况， 从而能 够及时处理电线断开。 如果只需判断高压电线 （丝） 断裂与否， 则仅需在末端 B处设 一个探测点即可； 如果需要判断断点， 则需要设置多个探测点。 假设高压电线或电极 丝在 n-1点和 n点之间断裂， 则 n点以后的各探测点均无高压感应信号， 因此可以判 断出断点所处区间。 图 3是根据本发明实施例的交流高压电线的监测方法的流程图， 如图 3所示， 该 方法包括如下的步骤 S102至步骤 S106。
步骤 S102:通过交流高压电线与探测电极形成的电容感应交流高压以得到感应信 号。 步骤 S104: 判断感应信号是否满足预设条件。 步骤 S106: 在感应信号不满足预设条件时， 输出报警信号。 在该实施例中， 在交流高压电线附近设置探测电极， 以使探测电极 1 电线形成电 容， 通过步骤 S102感应交流高压形成感应信号， 通过步骤 S104将该感应信号与预设 条件进行比较， 其中， 预设条件为交流高压电线正常工作时应有的特性， 从而， 在该 感应信号与预设条件不符时， 说明交流高压电线断开， 此时输出报警信号， 以使工作 人员及时处理电线的断开。 在该实施例中， 输出报警信号可以包括输出控制显示器显示报警信息的信号， 或 者控制报警器进行报警的信号， 或者输出以其他方式警示工作人员电线断开的信号。 优选地，步骤 S102包括：通过交流高压电线与探测电极形成的电容感应交流高压 以得到感应电压， 步骤 S104与步骤 S106包括： 计算感应电压； 判断感应电压是否低 于预设值； 以及在感应电压低于预设值时， 输出报警信号。 其中， 采用以下公式计算感应电压:
其中， U为高压交流电压， f为高压交流电压频率， VR为电阻 R上的感应电压， 由缓冲器缓冲输出， 对该信号进行缓冲处理后， 控制器根据感应电压进行报警或其它 控制操作。 从以上的描述中， 可以看出， 本发明实现了如下技术效果： 实时监测交流高压电 线， 并在监测信号不满足预设条件时， 发出报警信号， 以使工作人员能够及时知晓交 流高压电线断开， 从而能够在交流高压电线断开时及时处理。 以上所述仅为本发明的优选实施例而已， 并不用于限制本发明， 对于本领域的技 术人员来说， 本发明可以有各种更改和变化。 凡在本发明的精神和原则之内， 所作的 任何修改、 等同替换、 改进等， 均应包含在本发明的保护范围之内。
Claims
1. 一种交流高压电线的监测装置， 其特征在于， 包括：
探测电极， 设置于与交流高压电线相距预设距离的位置， 用于与所述电线 形成电容；
感应装置， 与所述探测电极相连接， 用于通过所述电容感应交流高压以得 到感应信号； 以及
控制器， 与所述感应装置相连接， 用于判断所述感应信号是否满足预设条 件， 并在所述感应信号不满足所述预设条件时， 输出报警信号。
2. 根据权利要求 1所述的监测装置， 其特征在于， 所述感应装置为电阻， 所述电 阻的第一端与所述探测电极相连接， 所述电阻的第二端接地， 所述电阻用于形 成感应电压。
3. 根据权利要求 2所述的监测装置， 其特征在于， 还包括： 缓冲器， 第一端与所述电阻相连接， 第二端与所述控制器相连接。
4. 根据权利要求 2或 3所述的监测装置， 其特征在于， 所述控制器包括：
计算单元， 用于计算所述感应电压；
判断单元， 用于判断所述感应电压是否低于预设值； 以及
执行单元， 用于在所述感应电压低于所述预设值时， 输出所述报警信号。
5. 根据权利要求 4所述的监测装置， 其特征在于， 所述计算单元采用以下公式计 算所述感应电压：
¾ =■ U/ fi + i (2H CR)2
其中， R为所述电阻， VR为所述电阻的电压， 即所述感应电压， U为电线 上的交流电压， f为所述交流电压的频率， C为所述探测电极与所述电线之间的 电容。
6. 根据权利要求 1所述的监测装置， 其特征在于， 还包括：
报警器， 与所述控制器相连接， 用于根据所述报警信号进行报警。
一种交流高压电线的监测方法， 其特征在于， 包括：
通过交流高压电线与探测电极形成的电容感应交流高压以得到感应信号； 判断所述感应信号是否满足预设条件； 以及
在所述感应信号不满足预设条件时， 输出报警信号。 根据权利要求 7所述的监测方法， 其特征在于， 通过交流高压电线与探测电极 形成的电容感应交流高压以得到感应信号包括： 形成感应电压。 根据权利要求 8所述的监测方法， 其特征在于， 判断所述感应信号是否满足预 设条件； 以及在所述感应信号不满足预设条件时， 输出报警信号包括：
计算所述感应电压；
判断所述感应电压是否低于预设值； 以及
在所述感应电压低于所述预设值时， 输出所述报警信号。 根据权利要求 9所述的监测方法， 其特征在于， 采用以下公式计算所述感应电 压：
¾ = 0 ^1 + 1/(2«:R)3
其中， R为所述电阻， VR为所述电阻的电压， 即所述感应电压， U为电线 上的交流电压， f为所述交流电压的频率， C为所述探测电极与所述电线之间的 电容。
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| US4523187A (en) * | 1980-08-29 | 1985-06-11 | Norman W. Hutchinson & Sons Pty. Ltd. | Alarm system for electric fences |
| US5570010A (en) * | 1992-05-20 | 1996-10-29 | The Furukawa Electric Co., Ltd. | Method and apparatus for identifying objects using compound signal and a detector employing an electrical static coupling technique |
| US20010002793A1 (en) * | 1999-12-02 | 2001-06-07 | Woodhead Robert Charles Bryan | Detector device |
| CN101819226A (zh) * | 2010-03-10 | 2010-09-01 | 国网电力科学研究院 | 1000kV特高压交流非接触多通道测距式验电器 |
| CN201611364U (zh) * | 2010-03-10 | 2010-10-20 | 国网电力科学研究院 | 1000kV特高压交流非接触多通道测距式验电器 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4523187A (en) * | 1980-08-29 | 1985-06-11 | Norman W. Hutchinson & Sons Pty. Ltd. | Alarm system for electric fences |
| US5570010A (en) * | 1992-05-20 | 1996-10-29 | The Furukawa Electric Co., Ltd. | Method and apparatus for identifying objects using compound signal and a detector employing an electrical static coupling technique |
| US20010002793A1 (en) * | 1999-12-02 | 2001-06-07 | Woodhead Robert Charles Bryan | Detector device |
| CN101819226A (zh) * | 2010-03-10 | 2010-09-01 | 国网电力科学研究院 | 1000kV特高压交流非接触多通道测距式验电器 |
| CN201611364U (zh) * | 2010-03-10 | 2010-10-20 | 国网电力科学研究院 | 1000kV特高压交流非接触多通道测距式验电器 |
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