Air-insulated switching device used for controlling inner electric field

Abstract

The invention provides an air-insulated switching device used for controlling an inner electric field. The switching device comprises a busbar chamber, a circuit breaker chamber, a cable chamber and an instrument chamber which are separated by metal baffle plates, wherein a circuit breaker is inserted in a working position through a chassis; a wall bushing and a static contact box are structures with inner shields; the structure of a capacitance mandrel in a live displaying sensor is modified; and each live part of the electrode is provided with a voltage equalizing cover with an epoxy layer. The invention has the following advantages: each part in a high electric field intensity of the equipment is provided with the special voltage equalizing cover with the epoxy layer, which is designed by the invention, and the elements with inner shields to control the inner electric field. Therefore, the insulating property is greatly increased, the electric clearance is reduced, the size of cabinet is greatly reduced, the floor space is reduced, the voltage boosting modification is facilitated, the capital can be saved and the effect is remarkable.

Description

technical field [0001] The invention relates to a switchgear, in particular to an air-insulated switchgear for internal electric field regulation in which the electric field is regulated for high-voltage components in the device and the insulation performance of the device is improved. Background technique [0002] At present, there are many internal components of the switchgear, which causes the internal electric field of the equipment to be relatively complicated, and the volume of the equipment is relatively large. In addition, generally only by maintaining a certain air gap between high-voltage components can the insulation performance between components be guaranteed. In this way, the volume of the equipment needs to be further increased. The increase in equipment volume increases the production cost on the one hand, and increases the cost of transportation and land use on the other hand. Switchgear needs to work normally under different climatic conditions. However, b...

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Problems solved by technology

Switchgear needs to work normally under different climatic conditions. However, because the various components in the existing equipment work under the condition of uneven electric field, it is difficult to realize the normal operation of the equipment under overvoltage and harsh environmental conditions. ; Therefore, the insulation failure rate of the existing switchgear remains high, and the reliability and safety of the work cannot be guaranteed, resulting in relatively large potential safety hazards for the power grid

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