Chamber type automatic duplicate supply converting switch

Abstract

The invention discloses a box type automatic double-power-supply transfer switch which comprises a box body, three main power supply binding posts which are arranged on the box body, three spare power supply binding posts, three load binding posts and a power supply transferring mechanism, wherein the power supply transferring mechanism comprises a main transferring shaft and an auxiliary transferring shaft, three main switching contact knifes which are used for switching the main power supply binding posts are arranged on the main transferring shaft, three auxiliary switching contact knifes which are used for switching the auxiliary power supply binding posts are arranged on the auxiliary transferring shaft, and the main transferring shaft and the auxiliary transferring shaft are linked by an interlocking interactive mechanism. The invention transfers double power supplies by linking the two shafts and has the advantages of compact structure and small volume.

Description

technical field [0001] The invention belongs to the technical field of high-voltage electric switches, and in particular relates to a box-type automatic dual-power switch. Background technique [0002] At present, in order to improve the reliability of power supply, a large number of dual power supply lines (two power supply lines, generally one power system line and one self-contained line) are used in the power supply system. When the power supply of one line fails, the other line supplies power. . For this reason, control devices are needed, and no less than two high-voltage switchgears should be used indoors, and no less than two high-voltage switches on poles should be used outdoors, so as to realize the requirements of selecting power supply lines. This control method not only increases the user's equipment and operating costs, but also poses hidden dangers of power supply accidents. For two or more high-voltage switchgear / column-mounted high-voltage switches, it is ...

AI Technical Summary

Problems solved by technology

[0003] Chinese patent application 200610154471.3 discloses an outdoor high-voltage dual-power vacuum circuit breaker. This type of vacuum circuit breaker is equipped with a high-voltage dual-power conversion device consisting of a chained double-throw isolating switch on the vacuum circuit breaker. Although this method realizes high-voltage There are electrical interlocking and mechanical interlocking when the dual power supply is automatically switched, which reduces the possibility of two high-voltage feeds at the same time. It is an ideal high-voltage dual power switching device at present, but there are still drawbacks. In the external environment, with the increase of the number of times and time of use, the surface of the contact will continue to oxidize, resulting in an increase in the resistance of the contact and a decrease in the conductivity, and the contact is prone to heat and burnout.

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