CN204330914U - A kind of Transformer Bushing Tap monitoring device - Google Patents
A kind of Transformer Bushing Tap monitoring device Download PDFInfo
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- CN204330914U CN204330914U CN201420771269.5U CN201420771269U CN204330914U CN 204330914 U CN204330914 U CN 204330914U CN 201420771269 U CN201420771269 U CN 201420771269U CN 204330914 U CN204330914 U CN 204330914U
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- 238000012544 monitoring process Methods 0.000 abstract description 14
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- 230000009466 transformation Effects 0.000 abstract description 6
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- 238000009413 insulation Methods 0.000 description 8
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Abstract
本实用新型公开了一种变压器套管末屏监测装置，该装置将穿心传感器设置于接地盖和底座所围合的腔体内，且引线柱穿设于所述穿心传感器的磁芯中，并将穿心传感器的信号线通过所述接地盖的顶部的穿设的孔中引出。本实用新型实现了传感器与套管末屏的一体化整合，在安装时不需要对变压器套管进行相应改造，同时，由于将传感器内置于套管末屏中，避免了外界电磁干扰对传感器的影响，监测数据更加准确。由于本实用新型中套管末屏仍然采用了传统的通过接地盖和底座的接地方式，因此不需要外部接地，进而降低了外部接地所造成了接地不良的风险。本实用新型的变压器套管末屏监测装置结构简单，安装可靠，比现有的套管末屏监测装置更加安全。
The utility model discloses a monitoring device for the end screen of a transformer bushing. In the device, a through-core sensor is arranged in a cavity enclosed by a ground cover and a base, and a lead column is arranged in the magnetic core of the through-core sensor. And lead out the signal line of the through-core sensor through the pierced hole on the top of the ground cover. The utility model realizes the integrated integration of the sensor and the end screen of the bushing, and does not need to carry out corresponding transformation on the transformer bushing during installation. At the same time, since the sensor is built in the end screen of the bushing, the influence of external electromagnetic interference on the sensor is avoided. impact, the monitoring data is more accurate. Since the end screen of the bushing in the utility model still adopts the traditional grounding method through the grounding cover and the base, no external grounding is required, thereby reducing the risk of poor grounding caused by external grounding. The transformer bushing end screen monitoring device of the utility model has simple structure, reliable installation and is safer than the existing bushing end screen monitoring device.
Description
技术领域 technical field
本实用新型涉及变压器套管在线监测领域，特别涉及一种变压器套管末屏监测装置。 The utility model relates to the field of on-line monitoring of transformer bushings, in particular to a monitoring device for the end screen of transformer bushings.
背景技术 Background technique
高压套管作为变电站中所使用的电器，主要用于变压器、电抗器以及高压进出线的对地绝缘、支撑和载流等。高压套可分为变压器套管、电抗器套管、穿墙套管等。 As electrical appliances used in substations, high-voltage bushings are mainly used for ground insulation, support and current carrying of transformers, reactors, and high-voltage incoming and outgoing lines. High-voltage bushings can be divided into transformer bushings, reactor bushings, wall bushings, etc.
对于变压器套管而言，一般可分为充油式套管和电容式套管。其中，充油式套管中的电缆纸类似于电容式套管中的均压极板。电容式套管中的电容芯子是一串同轴圆柱形的电容器。充油式套管又可分为单油隙和多油隙套管，电容式套管又可分为胶纸和油纸套管。 For transformer bushings, it can generally be divided into oil-filled bushings and capacitor bushings. Among them, the cable paper in the oil-filled bushing is similar to the equalizing plate in the capacitive bushing. The capacitor core in the capacitor bushing is a series of coaxial cylindrical capacitors. Oil-filled bushings can be divided into single oil gap and multi-oil gap bushings, and capacitive bushings can be divided into gummed and oiled paper bushings.
在应用中，变压器及电容性设备的绝缘十分重要，它决定了变压器和变压器套管的技术经济性行能和运行可靠性。变压器和变压器套管的绝缘在运行中受到电、热和机械应力及环境应力的作用，其性能会随着使用时间的推移而逐渐下降，或者说绝缘状态会劣化，最终丧失绝缘功能。而绝缘的老化是一个渐变过程，如果不及时发现，就可能导致变压器及变压器套管发生故障，甚至突发性的电力事故，造成巨大的直接和间接损失。 In the application, the insulation of transformers and capacitive equipment is very important, which determines the technical and economic performance and operational reliability of transformers and transformer bushings. The insulation of transformers and transformer bushings is subjected to electrical, thermal and mechanical stresses and environmental stresses during operation, and their performance will gradually decline with the passage of time, or the insulation state will deteriorate, and eventually lose the insulation function. The aging of insulation is a gradual process. If it is not discovered in time, it may lead to failure of transformers and transformer bushings, or even sudden electrical accidents, resulting in huge direct and indirect losses.
为了应对上述问题，在电容式套管中增加了套管末屏，以用于对变压器套管的监测。现有的广泛使用的一种套管末屏结构如图1所示，其包括引线柱11、接地盖12和底座13，其中，所述底座13安装于变压器套管2外表面并与变压器套管2外表面电接触以通过所述变压器套管2外表面接地，所述引线柱11电连接于变压器套管2中的外层电容层21，并穿设于底座13中，为防止引线柱11穿出所述变压器套管2时与套管表面形成电连接，在引线柱11外围设有绝缘层15，接地盖12盖合于所述底座13上并将所述引线柱11包裹在接地盖12与底座13所形成的腔体内，所述接地盖12与底座13之间电连接，引线柱11的顶部与接地盖12的内部顶面电连接，进而形成了从引线柱11经过接地盖12到底座13的导电通路，而底座13通过变压器套管2的外表面接地，进而形成了套管末屏的有效接地。为了防潮，在接地盖12和底座13之间 设有相匹配的凸台结构，并在凸台结构的缝隙间设置密封垫14，以防止湿气进入腐蚀。为了适用于监测、检修等要求，接地盖12和底座13之间可采用螺纹连接的方式，以便于接地盖12拆卸。 In order to deal with the above problems, a bushing end screen is added to the capacitive bushing for monitoring the transformer bushing. An existing widely used bushing end screen structure is shown in Figure 1, which includes a lead post 11, a ground cover 12 and a base 13, wherein the base 13 is installed on the outer surface of the transformer bushing 2 and is connected to the transformer bushing. The outer surface of the tube 2 is electrically contacted to be grounded through the outer surface of the transformer bushing 2, and the lead post 11 is electrically connected to the outer capacitor layer 21 in the transformer bushing 2, and is installed in the base 13, in order to prevent the lead post from 11 passes through the transformer bushing 2 to form an electrical connection with the surface of the bushing, an insulating layer 15 is provided around the lead post 11, and the ground cover 12 covers the base 13 and wraps the lead post 11 on the ground. In the cavity formed by the cover 12 and the base 13, the ground cover 12 is electrically connected to the base 13, and the top of the lead post 11 is electrically connected to the inner top surface of the ground cover 12, thereby forming a connection from the lead post 11 through the ground cover. 12 to the base 13, and the base 13 is grounded through the outer surface of the transformer bushing 2, thereby forming an effective grounding of the end screen of the bushing. In order to prevent moisture, a matching boss structure is provided between the ground cover 12 and the base 13, and a gasket 14 is set between the gaps of the boss structure to prevent moisture from entering and corroding. In order to meet the requirements of monitoring and maintenance, the connection between the ground cover 12 and the base 13 can be screwed, so that the ground cover 12 can be easily disassembled.
为了了解变压器及套管的运行状态，避免或减少因绝缘故障引起损坏和非计划停电，需要通过套管末屏对变压器套管进行监测。对于图1所示的套管末屏结构来说，对变压器套管进行监测，需要将接地盖12卸下，并将监测装置连接于引线柱11，以监测变压器套管漏电流及绝缘情况，待监测结束后，还需将接地盖12安装于原处，以保证引线柱11的良好接地。这种方式，因为需要经常对接地盖12进行拆卸，难以保证引线柱11在正常工作状态下的有效接地，仍然影响着变压器及套管的安全运行。 In order to understand the operating status of transformers and bushings, avoid or reduce damage and unplanned power outages caused by insulation faults, it is necessary to monitor the transformer bushings through the end screen of the bushing. For the bushing end screen structure shown in Figure 1, to monitor the transformer bushing, it is necessary to remove the ground cover 12 and connect the monitoring device to the lead post 11 to monitor the leakage current and insulation of the transformer bushing. After the monitoring is finished, the ground cover 12 needs to be installed in place to ensure good grounding of the lead post 11 . In this way, because the ground cover 12 needs to be frequently disassembled, it is difficult to ensure the effective grounding of the lead post 11 under normal working conditions, which still affects the safe operation of the transformer and the bushing.
因此，提出了一种改进方案。如图2所示，为现有的一种改进的套管末屏结构。该结构是将图1所示的套管末屏的接地盖12更换为绝缘盖16，并从引线柱11中接出引线，所述引线连接到穿心传感器3中，并在穿心传感器3的安装位置处的变压器4表面就近接地。穿心传感器3主要由环形的传感器磁芯31构成，所述引线从传感器磁芯31的中心穿过，之后在穿心传感器3的安装位置处的变压器4表面就近接地。监测系统通过实时接收穿心传感器3的监测信号和实时分析进而实现了对解变压器及套管的运行状态的实时监测，并且不需在现场对套管末屏进行拆装工作。 Therefore, an improved scheme is proposed. As shown in Figure 2, it is an existing improved casing end screen structure. This structure is to replace the ground cover 12 of the bushing end screen shown in Figure 1 with an insulating cover 16, and connect the lead wire from the lead post 11, the lead wire is connected to the through-hole sensor 3, and the through-hole sensor 3 The surface of the transformer 4 at the installation position is grounded nearby. The through-hole sensor 3 is mainly composed of an annular sensor magnetic core 31 , the lead wire passes through the center of the sensor magnetic core 31 , and then the surface of the transformer 4 at the installation position of the through-hole sensor 3 is grounded nearby. The monitoring system realizes real-time monitoring of the running status of the transformer and bushing by receiving and analyzing the monitoring signal of the through-core sensor 3 in real time, and does not need to disassemble and assemble the end screen of the bushing on site.
图2所示的套管末屏结构中，虽然实现了对解变压器及套管的运行状态的实时监测，并且不需在现场对套管末屏进行拆装工作。但是，其中的穿心传感器3往往安装于套管末屏的变压器壳体，因此，安装时需要对变压器壳体进行改造(例如打孔)而影响现有变压器的安全，另外，引线从引线柱11到穿心传感器3之间的部分暴露于外部易于受到外部电磁场的干扰而影响监测信号的准确，同时所述引线接地时往往是连接于变压器套管表面或者变压器壳体表面，因为变压器套管表面或者变压器壳体表面为了防止腐蚀而涂有油漆，因此，所述引线的良好接地也受到了影响。 In the bushing end screen structure shown in Figure 2, although the real-time monitoring of the running status of the transformer and the bushing is realized, and there is no need to disassemble and assemble the bushing end screen on site. However, the core-through sensor 3 is often installed in the transformer casing of the bushing end screen, therefore, the transformer casing needs to be modified (for example, punched) during installation to affect the safety of the existing transformer. The part between 11 and the through-hole sensor 3 is exposed to the outside and is prone to be interfered by the external electromagnetic field to affect the accuracy of the monitoring signal. At the same time, the lead wire is often connected to the surface of the transformer bushing or the surface of the transformer shell when the ground is connected, because the transformer bushing Surfaces or transformer housing surfaces are painted to prevent corrosion, so good grounding of said leads is also compromised.
实用新型内容 Utility model content
有鉴于此，本实用新型提供一种新型的变压器套管末屏监测装置，以提高变压器和套管监测的安全。 In view of this, the utility model provides a novel transformer bushing end screen monitoring device to improve the safety of transformer and bushing monitoring.
本申请的技术方案是这样实现的： The technical scheme of the present application is realized like this:
一种变压器套管末屏监测装置，包括底座、引线柱和接地盖；其中， A transformer bushing end screen monitoring device, including a base, a lead post and a ground cover; wherein,
所述底座安装于变压器套管外表面并通过所述变压器套管外表面接地； The base is installed on the outer surface of the transformer bushing and grounded through the outer surface of the transformer bushing;
所述引线柱电连接于变压器套管中的外层电容层，并在所述底座的中部位置处从变压器套管中引出； The lead post is electrically connected to the outer capacitor layer in the transformer bushing, and is drawn out from the transformer bushing at the middle position of the base;
所述接地盖盖合于所述底座并与所述底座电连接，所述引线柱位于所述接地盖和底座所围合的腔体内，且所述引线柱的顶部与所述接地盖电连接； The ground cover covers the base and is electrically connected to the base, the lead post is located in the cavity enclosed by the ground cover and the base, and the top of the lead post is electrically connected to the ground cover ;
所述变压器套管末屏监测装置还包括穿心传感器和信号线； The transformer bushing end screen monitoring device also includes a core-through sensor and a signal line;
所述穿心传感器位于所述接地盖和底座所围合的腔体内，并套设于所述引线柱； The through-hole sensor is located in the cavity enclosed by the ground cover and the base, and is sleeved on the lead post;
所述信号线电连接于所述穿心传感器，并通过所述接地盖的顶部所穿设的孔，从所述接地盖中引出。 The signal line is electrically connected to the through-hole sensor, and is led out from the ground cover through a hole formed on the top of the ground cover.
进一步，所述穿心传感器由磁芯和缠绕于所述磁芯的线圈组成；其中， Further, the through-core sensor is composed of a magnetic core and a coil wound around the magnetic core; wherein,
所述磁芯套设于所述引线柱； The magnetic core is sheathed on the lead post;
所述信号线电连接于所述线圈。 The signal line is electrically connected to the coil.
进一步，所述引线柱与所述变压器套管外表面之间以及所述底座之间设有绝缘层。 Further, an insulating layer is provided between the lead post and the outer surface of the transformer bushing and between the base.
进一步，所述底座和接地盖之间设有密封结构。 Further, a sealing structure is provided between the base and the ground cover.
进一步，所述密封结构包括： Further, the sealing structure includes:
所述底座所具有的以所述引线柱为中心的凸环； a protruding ring centered on the lead post of the base;
所述接地盖的内侧所具有的与所述凸环上表面相匹配的平台；以及 the inner side of the ground cover has a platform that matches the upper surface of the raised ring; and
所述凸环上表面与所述平台之间的空隙处所装设的密封垫。 A gasket installed in the gap between the upper surface of the convex ring and the platform.
进一步，所述凸环的外侧面具有外螺纹； Further, the outer surface of the protruding ring has external threads;
所述接地盖的内侧具有与所述外螺纹相匹配的内螺纹； The inner side of the ground cover has internal threads matching the external threads;
所述接地盖通过所述内螺纹和外螺纹旋拧于所述底座上。 The ground cover is screwed on the base through the inner thread and the outer thread.
从上述方案可以看出，本实用新型的变压器套管末屏监测装置实现了传感器与套管末屏的一体化整合，在安装时不需要对变压器和套管进行相应改造，节约了改造费用并避免了改造风险。同时，由于将传感器内置于套管末屏中，避免了外界电磁干扰对传感器的影响，监测数据更加准确。同时，由于本实用新型的变压器套管末屏监测装置中，套管末屏仍然采用了传统的通过接地盖和底座的接地方式，因此不需要外部接地，进而降低了外部接地所造成了接地不良的风险。本实用新型的变压器套管末屏监测装置结构简单，安装可靠，比现有的套管末屏监测装置更加安全。 It can be seen from the above scheme that the transformer bushing end screen monitoring device of the utility model realizes the integrated integration of the sensor and the bushing end screen, and does not need to carry out corresponding transformation on the transformer and bushing during installation, which saves the transformation cost and The risk of modification is avoided. At the same time, since the sensor is built in the end screen of the casing, the influence of external electromagnetic interference on the sensor is avoided, and the monitoring data is more accurate. At the same time, in the transformer bushing end screen monitoring device of the utility model, the bushing end screen still adopts the traditional grounding method through the ground cover and the base, so no external grounding is required, thereby reducing the poor grounding caused by external grounding risks of. The transformer bushing end screen monitoring device of the utility model has simple structure, reliable installation, and is safer than the existing bushing end screen monitoring device.
附图说明 Description of drawings
图1为现有的一种套管末屏结构示意图； Fig. 1 is the structural schematic diagram of an existing casing end screen;
图2为现有的一种改进后的套管末屏结构示意图； Fig. 2 is a schematic structural diagram of an existing improved casing end screen;
图3为本实用新型的变压器套管末屏监测装置结构示意图。 Fig. 3 is a structural schematic diagram of the transformer bushing end screen monitoring device of the present invention.
具体实施方式 Detailed ways
为了使本实用新型的目的、技术方案及优点更加清楚明白，以下参照附图并举实施例，对本实用新型作进一步详细说明。 In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be further described in detail below with reference to the accompanying drawings and examples.
图3为本实用新型提供的变压器套管末屏监测装置实施例结构示意图，其包括引线柱11、接地盖12和底座13。其中，所述底座13安装于变压器套管2外表面并通过所述变压器套管2外表面接地。所述引线柱11电连接于变压器套管2中的外层电容层21，并在所述底座13的中部位置处从变压器套管2中引出。所述接地盖12盖合于所述底座13并与所述底座13电连接，所述引线柱11位于所述接地盖12和所述底座13所围合的腔体内，并且，所述引线柱11的顶部与所述接地盖12电连接，进而所述引线柱11通过所述接地盖12、底座13以及变压器套管2所组成的通路接地。 FIG. 3 is a structural schematic diagram of an embodiment of a transformer bushing end screen monitoring device provided by the present invention, which includes a lead post 11 , a ground cover 12 and a base 13 . Wherein, the base 13 is installed on the outer surface of the transformer bushing 2 and grounded through the outer surface of the transformer bushing 2 . The lead posts 11 are electrically connected to the outer capacitor layer 21 in the transformer bushing 2 and lead out from the transformer bushing 2 at the middle position of the base 13 . The ground cover 12 covers the base 13 and is electrically connected to the base 13, the lead post 11 is located in the cavity enclosed by the ground cover 12 and the base 13, and the lead post 11 The top of 11 is electrically connected to the ground cover 12 , and then the lead post 11 is grounded through the path formed by the ground cover 12 , the base 13 and the transformer bushing 2 .
同时，本实用新型所提供的变压器套管末屏监测装置还包括穿心传感器5和信号线6。其中，所述穿心传感器5位于所述接地盖12和底座13所围合的腔体内，并套设于所述引线柱11；所述信号线6电连接于所述穿心传感器5，并通过所述接地盖12的顶部所穿设的孔122，从所述接地盖12中引出。其中，所述穿心传感器5由磁芯51和缠绕于所述磁芯51的线圈(图中未示出)组成，其中，所述磁芯51套设于所述引线柱11，信号线6电连接于所述线圈，以输出测量信号。所述信号线6通过所述接地盖12顶部所穿设的孔122中引出，进而连接相应的监测设备。 At the same time, the transformer bushing end screen monitoring device provided by the utility model also includes a core-through sensor 5 and a signal line 6 . Wherein, the through-hole sensor 5 is located in the cavity surrounded by the ground cover 12 and the base 13, and is sleeved on the lead post 11; the signal line 6 is electrically connected to the through-hole sensor 5, and The hole 122 pierced through the top of the ground cover 12 leads out from the ground cover 12 . Wherein, the through-core sensor 5 is composed of a magnetic core 51 and a coil (not shown) wound on the magnetic core 51, wherein the magnetic core 51 is sleeved on the lead post 11, and the signal line 6 It is electrically connected to the coil to output measurement signals. The signal line 6 is led out through the hole 122 pierced at the top of the ground cover 12 , and then connected to corresponding monitoring equipment.
继续参见图3所示，本实用新型的变压器套管末屏监测装置中，为防止引线柱11与变压器套管2外表面之间以及引线柱11与底座13之间率先接地而导致的无法监测的情况，在引线柱11与变压器套管2的外表面之间，以及引线柱11与底座13之间设有绝缘层15。 Continuing to refer to Fig. 3, in the monitoring device for the end screen of the transformer bushing of the present invention, in order to prevent the first grounding between the lead post 11 and the outer surface of the transformer bushing 2 and between the lead post 11 and the base 13, it cannot be monitored. In some cases, an insulating layer 15 is provided between the lead post 11 and the outer surface of the transformer bushing 2 , and between the lead post 11 and the base 13 .
同时，为了防止长时间使用时，外界环境(例如水蒸汽)长时间对变压器套管末屏监测装置内部的腐蚀，本实用新型中还具有密封结构。该密封结构包括所述底座13所具有的以所述引线柱11为中心的凸环131，所述接地盖12的内侧所具有的与所述凸环131上表面相匹配的平台121；以及，所述凸环131上表面与平台121之间的空隙处所装设的密封垫14。 At the same time, in order to prevent the external environment (such as water vapor) from corroding the inside of the transformer bushing end screen monitoring device for a long time during long-term use, the utility model also has a sealing structure. The sealing structure includes a protruding ring 131 centered on the lead post 11 of the base 13 , and a platform 121 on the inner side of the ground cover 12 matching the upper surface of the protruding ring 131 ; and, The gasket 14 is installed in the gap between the upper surface of the protruding ring 131 and the platform 121 .
另外，所述凸环131的外侧面具有外螺纹，所述接地盖12的内侧具有与所述外螺纹相匹配的内螺纹，所述接地盖12通过所述内螺纹和外螺纹的旋拧于所述底座13上。 In addition, the outer surface of the protruding ring 131 has an external thread, the inner side of the ground cover 12 has an internal thread matching the external thread, and the ground cover 12 is screwed on the internal thread and the external thread. on the base 13.
本实用新型的变压器套管末屏监测装置实现了传感器与套管末屏的一体化整合，在安装时不需要对变压器和套管进行相应改造，节约了改造费用并避免了改造风险。同时，由于将传感器内置于套管末屏中，避免了外界电磁干扰对传感器的影响，监测数据更加准确。同时，由于本实用新型的变压器套管末屏监测装置中，套管末屏仍然采用了传统的通过接地盖和底座的接地方式，因此不需要外部接地，进而降低了外部接地所造成了接地不良的风险。本实用新型的变压器套管末屏监测装置结构简单，安装可靠，比现有的套管末屏监测装置更加安全。 The transformer bushing end screen monitoring device of the utility model realizes the integrated integration of the sensor and the bushing end screen, and does not require corresponding transformation of the transformer and bushing during installation, which saves transformation costs and avoids transformation risks. At the same time, since the sensor is built in the end screen of the casing, the influence of external electromagnetic interference on the sensor is avoided, and the monitoring data is more accurate. At the same time, in the transformer bushing end screen monitoring device of the utility model, the bushing end screen still adopts the traditional grounding method through the ground cover and the base, so no external grounding is required, thereby reducing the poor grounding caused by external grounding risks of. The transformer bushing end screen monitoring device of the utility model has simple structure, reliable installation, and is safer than the existing bushing end screen monitoring device.
以上所述仅为本实用新型的较佳实施例而已，并不用以限制本实用新型，凡在本实用新型的精神和原则之内，所做的任何修改、等同替换、改进等，均应包含在本实用新型保护的范围之内。 The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. within the spirit and principles of the present utility model shall include Within the protection scope of the utility model.
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| CN201420771269.5U CN204330914U (en) | 2014-12-09 | 2014-12-09 | A kind of Transformer Bushing Tap monitoring device |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104965128A (en) * | 2015-06-29 | 2015-10-07 | 国网天津市电力公司 | Multifunctional auxiliary test tool for bushing tap grounding device |
| CN105467286A (en) * | 2015-12-21 | 2016-04-06 | 许继（厦门）智能电力设备股份有限公司 | Local discharge detection device |
| CN106645822A (en) * | 2017-01-16 | 2017-05-10 | 江苏骏龙光电科技股份有限公司 | Voltage transformer insulation sleeve tube monitoring device and installation method therefor |
| CN111381186A (en) * | 2020-03-25 | 2020-07-07 | 国家电网有限公司 | Test device for simulating different grounding states of high-voltage bushing tap |
| CN112041945A (en) * | 2018-03-22 | 2020-12-04 | Abb电网瑞士股份公司 | Sleeve with end screen assembly |
| CN112731075A (en) * | 2020-12-17 | 2021-04-30 | 国网电力科学研究院武汉南瑞有限责任公司 | Intelligent sleeve with integrated structure built in sensor |
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2014
- 2014-12-09 CN CN201420771269.5U patent/CN204330914U/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104965128A (en) * | 2015-06-29 | 2015-10-07 | 国网天津市电力公司 | Multifunctional auxiliary test tool for bushing tap grounding device |
| CN104965128B (en) * | 2015-06-29 | 2017-09-15 | 国网天津市电力公司 | Bottom shielding of bushing earthing or grounding means multi-functional auxiliary testing instrument |
| CN105467286A (en) * | 2015-12-21 | 2016-04-06 | 许继（厦门）智能电力设备股份有限公司 | Local discharge detection device |
| CN106645822A (en) * | 2017-01-16 | 2017-05-10 | 江苏骏龙光电科技股份有限公司 | Voltage transformer insulation sleeve tube monitoring device and installation method therefor |
| CN112041945A (en) * | 2018-03-22 | 2020-12-04 | Abb电网瑞士股份公司 | Sleeve with end screen assembly |
| US11270817B2 (en) | 2018-03-22 | 2022-03-08 | Hitachi Energy Switzerland Ag | Bushing with a tap assembly |
| CN111381186A (en) * | 2020-03-25 | 2020-07-07 | 国家电网有限公司 | Test device for simulating different grounding states of high-voltage bushing tap |
| CN112731075A (en) * | 2020-12-17 | 2021-04-30 | 国网电力科学研究院武汉南瑞有限责任公司 | Intelligent sleeve with integrated structure built in sensor |
| CN112731075B (en) * | 2020-12-17 | 2022-04-29 | 国网电力科学研究院武汉南瑞有限责任公司 | A kind of intelligent casing with built-in sensor integrated structure |
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