Partial discharge detection device and insulator for gas-insulated metal-enclosed switchgear

Abstract

The invention discloses a partial discharging detection device of gas insulation metal sealing switching equipment. The partial discharging detection device is connected with an insulator. The insulator comprises an insulation part, a conductor insert and a metal ring. The partial discharging detection device comprises a partial discharging detection antenna, a signal lead-out part and a signal processing unit; the partial discharging detection antenna is nested inside the insulation part; the signal lead-out part is connected with the partial discharging detection antenna, so as to lead out signals detected by the partial discharging detection antenna to the signal processing unit; and the partial discharging detection antenna is in a shape of a spiral spring. The partial discharging detection device has the advantages in that an opening can be prevented from being arranged on a shell; the quantities of equipment modules and sealing loops can be reduced; the equipment reliability can be improved, and the cost is reduced, so that a product is relatively attractive and compact; the influences on the intensity and the insulation property of an insulation material body by the spiral spring shape are small; the bend transformation and the easiness for keeping the shape can be realized; the partial discharging detection device is convenient to machine; the flowing resistance of the insulating material body in a forming process is small; and detection signals of the antenna in the spiral spring shape are good.

Description

technical field [0001] The invention relates to a gas-insulated metal-enclosed switchgear partial discharge detection device and an insulator. Background technique [0002] In gas-insulated metal-enclosed switchgear, when there are internal defects such as metal foreign objects, partial discharge occurs due to the unsatisfactory insulation effect, which greatly reduces the service life of insulating components, which may cause damage to the equipment and cause accidents . Therefore, it is necessary to carry out partial discharge detection on switchgear early to prevent accidents. [0003] In the existing gas-insulated metal-enclosed switchgear, the partial discharge detection is usually carried out in the way of insulating and leading out the built-in antenna. For example: [0004] In the document CN95304213.3, a partial discharge detection device is disclosed, which has an annular gap antenna sensor, the sensor has a flat outer contour, and can be installed in the flange...

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Problems solved by technology

[0006] Since the built-in antenna is installed in the gas-insulated metal-enclosed switchgear as a partial discharge detection sensor, openings and mounting flanges need to be added to the metal shell, so additional installation and sealing links are added, which reduces the reliability of the equipment and also increases Lower the cost, affect the appearance

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