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Capacitive casing end screen signal detection device

A capacitive bushing and signal detection technology, applied in the direction of testing dielectric strength, etc., can solve the problems of potential safety hazards, large signal attenuation, low detection efficiency, etc., and achieve good applicability, small signal attenuation, and high detection efficiency. Effect

Pending Publication Date: 2018-03-23
HANGZHOU XIHU ELECTRONICS INST
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing devices have defects such as inconvenient installation, large signal attenuation, low detection efficiency, and potential safety hazards

Method used

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  • Capacitive casing end screen signal detection device
  • Capacitive casing end screen signal detection device

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Embodiment Construction

[0018] Such as figure 1 As shown, a capacitive bushing end screen signal detection device includes a signal acquisition device 1 and a signal processing device 2 that are threaded.

[0019] Such as figure 2 As shown, the signal acquisition device 1 includes a first metal shell 1-1, an end screen terminal 1-2, a high frequency partial discharge sensor 1-3 and a low frequency dielectric loss sensor 1-4.

[0020] The first metal shell 1-1 and the last screen terminal 1-2 are cylindrical, and the last screen terminal 1-2 is located in the first metal shell 1-1, and is integrally washed with the first metal shell 1-1. The last screen terminal 1-2 is connected to the first metal shell 1-1 through the connection platform 1-5, and the connection platform 1-5 closes one end of the last screen terminal 1-2, and the last screen terminal 1- 2 and the first metal shell 1-1 form an annular cavity.

[0021] A horizontal annular baffle 1-6 of insulating material is arranged in the annular...

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Abstract

The invention relates to a capacitive casing end screen signal detection device. The existing device has the disadvantages of inconvenient installation, large signal attenuation, low detection efficiency, potential safety hazard and the like. The device provided by the invention comprises a signal acquisition device and a signal processing device, wherein the signal acquisition device and the signal processing device are in threaded connection. The signal acquisition device comprises a first metal casing body, an end screen wiring terminal, a high-frequency partial discharge sensor and a low-frequency dielectric loss sensor. The end screen wiring terminal is located in the first metal casing body. The high-frequency partial discharge sensor and the low-frequency dielectric loss sensor sleeve the end screen wiring terminal. The signal processing device comprises a second metal casing body, a high frequency signal conditioning circuit board, a low frequency signal conditioning circuit board, a high frequency BNC connector and a low frequency BNC connector. The high frequency signal conditioning circuit board and the low frequency signal conditioning circuit board are arranged in thesecond metal casing body. The BNC connector is arranged on the second metal casing body. The capacitive casing end screen signal detection device provided by the invention has the advantages of excellent shielding performance, good anti-interference performance, safe and reliable use and long service life, and can effectively adapt to the on-site environment.

Description

technical field [0001] The invention belongs to the technical field of high-voltage detection, and in particular relates to a capacitive bushing end screen signal detection device. Background technique [0002] Bushing failure is one of the important reasons for power equipment failure and power outage. At present, the insulation state of the bushing is mainly detected by traditional preventive tests, but the pre-test period is long, and it is difficult to detect potential faults in the bushing in time. Generally speaking, there are two main structures of the casing end screen, one is the external thread structure, and the other is the internal thread structure, both of which are reliably grounded through the casing end screen grounding cover. [0003] Bushing partial discharge detection mainly collects high-frequency partial discharge signals through the bushing end screen. At present, relevant personnel have developed a device for collecting signals at the bushing end scr...

Claims

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Application Information

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IPC IPC(8): G01R31/12
CPCG01R31/12
Inventor 刘凤琳张武波叶新林厉洋王光祥
Owner HANGZHOU XIHU ELECTRONICS INST
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